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1
Šimon, T. "Aliphatic compounds, organic C and N and microbial biomass and its activity in long-term field experiment." Plant, Soil and Environment 51, No. 6 (November 19, 2011): 276–82. http://dx.doi.org/10.17221/3586-pse.
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The content of aliphatic compounds, hydrophobicity index, organic C and N content and the microbial biomass and respiration activity were analysed in soil samples originating from different plots of a long-term field experiment (variants: nil, NPK – mineral fertilization: 64.6–100 kg/ha/year, FYM – farmyard manure and FYM + NPK) from three blocks (III, IV and B) with different crop rotation. Samples were taken from 0–200 mm layer in 2002 and 2003 (spring and autumn). The plots without any fertilization had the significantly lowest aliphatic compound content compared to variants fertilized by FYM or FYM + NPK in all the evaluated blocks in both years. The variants fertilized only by mineral NPK without any organic fertilization had the slightly increased aliphatic compound content but they did not exceed significantly the control variants in most cases. The aliphatic compound contents correlated significantly with the organic C contents in 2002 and 2003, as well. The values of the hydrophobicity index showed a similar trend like the data mentioned above. Organic manure increased the soil organic nitrogen content, similarly to the carbon content. In variants fertilized by FYM and FYM + NPK the higher microbial biomass content was found comparing to unfertilized variants. Correlations between aliphatic compound content and biomass differed in spring (2002: r = 0.065, 2003: r = 0.068) and autumn (2002: r = 0.407, 2003: r = 0.529). Organically fertilized variants had increased basal respiration, in autumn 2002 the basal respiration was higher in variants fertilized by mineral NPK, too. The highest specific respiration was recorded in the unfertilised plot in block B (autumn 2002 and 2003), where low microbial biomass exhibited high activity. Increased specific respiration was found also in plots fertilized by FYM and FYM + NPK (block III and IV, autumn samplings). Positive significant correlations between microbial biomass content and basal respiration were found in 2002 (spring: r = 0.716) and 2003 (spring: r = 0.765, autumn: r = 0.671).
2
Luo, Qiao, Jing Wang, JianHui Wang, Yu Shen, Peng Yan, YouPeng Chen, and ChengCheng Zhang. "Fate and Occurrence of Pharmaceutically Active Organic Compounds during Typical Pharmaceutical Wastewater Treatment." Journal of Chemistry 2019 (April 8, 2019): 1–12. http://dx.doi.org/10.1155/2019/2674852.
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The chemical composition, distribution, and fate of pharmaceutically active compounds (PhACs) present in typical pharmaceutical wastewater treatment plants were investigated with the aim of effectively removing these pollutants while minimizing waste of resources and energy. The results of this study indicate that the relative content of an organic compound class is unrelated to the number of organic compounds in the influent and effluent, yet it is directly proportional to the pollution contribution in pharmaceutical wastewater. In wastewater influent, the organic compound classes with the highest relative contents and pollution contributions were acids (relative content = 63.65%, contribution to pollution = 67.22%), esters (44.96%, 41.24%), and heterocyclic compounds (30.24%, 35.23%); in wastewater effluent, these classes were organic acids (62.54%, 65.13%), esters (52.66%, 59.02%), and organosilicon compounds (42.46%, 37.45%). The different physicochemical characteristics of these pollutants result in different removal efficiencies. For example, N,N-dimethylformamide, 4-methyloctane, N-ethylmorpholine, and 4-amino-N,N- and N,N-diethylbenzamide are refractory and are not degraded by microorganisms; thus, these compounds are discharged into the aquatic environment. Other organic compound classes including organosilicon compounds, acids, esters, heterocycles, and alcohols are mostly biodegraded, which leads to high concentrations of hydrocarbons in the wastewater effluent. The results of this study provide a foundation for the improvement of pharmaceutical wastewater treatment.
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Schwarzenbach, R. P., and J. Westall. "Sorption of Hydrophobic Trace Organic Compounds in Groundwater Systems." Water Science and Technology 17, no. 9 (September 1, 1985): 39–55. http://dx.doi.org/10.2166/wst.1985.0081.
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Factors influencing the subsurface sorption behavior of neutral and ionizable trace organic compounds are discussed. At equilibrium, the sorption of a neutral hydrophobic organic compound can be expressed by a simple partition coefficient. Partition coefficients, and thus retardation factors, may be estimated from the octanol/water partition coefficient of the compound and the organic carbon content of the aquifer material, if the organic carbon content exceeds 0.1%. For ionizable (anionic) hydrophobic compounds (represented by chlorinated phenols), the distribution ratio depends on both the pH and ionic strength of the aqueous phase, in contrast to the partitioning model for neutral compounds in which the composition of the aqueous phase is relatively unimportant.
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Cvetković, Biljana, Aleksandra Bajić, Miona Belović, Lato Pezo, Danka Dragojlović, Olivera Šimurina, Marijana Djordjević, Karin Korntheuer, Christian Philipp, and Reinhard Eder. "Assessing Antioxidant Properties, Phenolic Compound Profiles, Organic Acids, and Sugars in Conventional Apple Cultivars (Malus domestica): A Chemometric Approach." Foods 13, no. 14 (July 20, 2024): 2291. http://dx.doi.org/10.3390/foods13142291.
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This study analyzed the phenolic compounds, organic acids, sugars, and antioxidant activity in different conventional apple cultivars (Malus domestica) from the Serbian market. Polyphenol profiles, sugars, and organic acid contents were analyzed by HPLC, and antioxidant activity was examined by DPPH and FRAP. Notable findings included variations in phenolic compound presence, with certain compounds detected only in specific cultivars. ‘Red Jonaprince’ exhibited the highest arbutin (0.86 mg/kg FW) and quercetin-3-rhamnoside content (22.90 mg/kg FW), while ‘Idared’ stood out for its gallic acid content (0.22 mg/kg FW) and ‘Granny Smith’ for its catechin levels (21.19 mg/kg FW). Additionally, malic acid dominated among organic acids, with ‘Granny Smith’ showing the highest content (6958.48 mg/kg FW). Fructose was the predominant sugar across all cultivars. Chemometric analysis revealed distinct groupings based on phenolic and organic acid profiles, with ‘Granny Smith’ and ‘Golden Delicious’ exhibiting unique characteristics. Artificial neural network modeling effectively predicted antioxidant activity based on the input parameters. Global sensitivity analysis highlighted the significant influence of certain phenolic compounds and organic acids on antioxidant activity.
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Jiao, Huiying, Sijia Wu, Jingming Li, and Yanxin Sun. "Effects of Pelletized and Coated Organic Fertilizers on Flavor Compounds of Tomato Fruits and Leaves." Foods 13, no. 11 (May 25, 2024): 1653. http://dx.doi.org/10.3390/foods13111653.
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The application of organic fertilizers is one of the most important agricultural measures aimed at improving the flavor and productivity of Lycopersicon esculentum, with the granulation and coating of organic fertilizers, which can reduce seepage losses of great significance to the ecosystem. In this study, Jingcai 8 tomato was selected as the test material. Headspace solid-phase microextraction and gas chromatography–mass spectrometry (HS-SPME-GC-MS) methods were used to investigate the effects of different pelletized organic fertilizers and various coating materials on the flavor profile of the tomatoes. The results indicated that 67 volatile organic compounds (VOCs) were identified in the tomato fruits and 62 volatile compounds were identified in the leaves under different fertilizer treatments. The volatile compound content of the fruits in the BP treatment group was 35.38 μg/g, which was higher than that in other treatment groups, and the volatile compound content of the leaves was lower. A differential compound analysis with log2|fold change| ≥ 1 and variable important in projection (VIP) > 1 highlighted styrene, 3-methyl-1-butanol, and (E, E)-2,4-hexadienal as the major up-regulated compounds and methyl salicylate as the major down-regulated compound in the tomato fruit BCK (control) vs. BP. Moreover, the α-phellandrene content decreased in the tomato leaves. In addition, an analysis of the tomato fruit differential compounds and compounds with odor activity values (OAV) of ≥ 1, considering the OAV values of characteristic aroma compounds, identified key compounds affecting the flavor of the tomato fruits under the BP treatment. These included 2-nonenal, (E)-2-pentylfuran, trans-β-ionone, 1-penten-3-one, (E, E)-2,4-hexadienal, and 3-hexenol (fruity, floral, and herbaceous odors), (E, E)-2,4-heptadienal (fatty odor), and hexanal (green odor). The combined results analysis of the volatile compound content, differential compounds, and OAV values of characteristic aroma compounds aimed to clarify that the BP treatment group, which applied pelletized, large-grain organic fertilizer with polyurethane (pozzolanic + small-grain oil-coated + 2% paraffinic + 4% polyurethane) as a coating material, proved to be most effective in influencing the flavor of the tomato fruits. This finding lays the foundation for its potential commercial application in artificial orchards.
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Du, Yaxiao, Xuebin Xu, Fei Ma, and Changwen Du. "Solvent-Free Synthesis of Iron-Based Metal-Organic Frameworks (MOFs) as Slow-Release Fertilizers." Polymers 13, no. 4 (February 13, 2021): 561. http://dx.doi.org/10.3390/polym13040561.
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Metal-organic frameworks (MOFs) were usually synthesized in hydrothermal conditions; in this study, a more energy-saving, easier to control, and solvent-free mechanochemical method was firstly applied to synthesize MOFs with varied reactants as slow release fertilizer, and the components and structures were characterized by X-ray diffraction (XRD), Fourier transform infrared total attenuated reflectance (FTIR-ATR), and laser-induced breakdown spectroscopy (LIBS). Results showed that three MOFs (compounds I, II, and III) were obtained, the MOFs were confirmed as oxalate phosphate oxalate frameworks (OPA-MOF), and ions were adsorbed between layers that contributed to the contents, while urea molecules mainly impacted the structure. The elemental compositions significantly varied among the three compounds; compound I showed the highest content of N (4.91%), P (15.71%), and Fe (18.60%), compound III indicated the highest content of C (6.52%) and K (12.59%), while the contents of C, K, P, and Fe in compound II were in the medium range. Similar release profiles of Fe and P were found among the three MOFs, and the release rates of nutrients were demonstrated as the order of N > K > P > Fe. The compositions and release profiles demonstrated potential application of MOFs as a novel slow-release fertilizer.
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Prasetiyo, Himawan, Sri Purwaningsih, Iriani Setyaningsih, Mala Nurilmala, Uju Uju, and Kustiyariah Tarman. "Off-odour Identification from Volatile Organic Compounds (VOCs) of Spirulina." BIO Web of Conferences 92 (2024): 02006. http://dx.doi.org/10.1051/bioconf/20249202006.
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Spirulina platensis is a common cyanobacteria microalga with high nutrition and bioactive compound sources. The addition of spirulina in foods and beverages improves nutrition and bioactive compound content. However, certain species of cyanobacteria are known to produce various compounds causing off-odour. This study investigates the chemical profile and volatile organic compounds (VOCs) in spirulina biomass and determine off-odour potency. The spirulina extract was analysed phytochemical qualitatively and GC-MS (Gas Chromatography-Mass Spectrometry). The Spectra mass was compared to the mass spectral database and profile of chemical compound libraries. The result shows, phytochemical analysis positively contains of alkaloids, flavonoids, tannins, saponins, and terpenoids. A total of 155 volatile compounds consisting of classes acid, alcohol, aldehyde, alkene, benzene, ether, ester, ketone, sulphur-contain, and terpene were identified. The off-odour VOC content such as phytol; cyclopropanebutanoic acid, 2- [[2 - [[2 - [(2- pentylcyclopropyl) methyl) cyclopropyl) methyl) cyclopropyl) methyl]-, methyl ester; 3.7.11.15-tetramethyl-2-hexadecen-1-ol; Imidazole, 2-fluoro-5-(2-carboxyvinyl)-; β-ionone; and N,N-Dimethyl-O-(1-methyl-butyl)-hydroxylamine, were detected in spirulina. The odour descriptions of off-odour VOCs are floral, balsamic, powdery, waxy, rancid, sweaty, woody, alkali, and fish-like. The off-odour content of VOCs might influence food's sensory odour, with spirulina added in excessive quantities.
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Zheng, Tingting, Shu Wang, Mengyao Wang, Jiao Mao, Yuanmeng Xu, Jiangling Ren, Yuhan Liu, Sichen Liu, Zhijun Qiao, and Xiaoning Cao. "Effect of Different Fertilizer Types on Quality of Foxtail Millet under Low Nitrogen Conditions." Plants 13, no. 13 (July 3, 2024): 1830. http://dx.doi.org/10.3390/plants13131830.
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In order to clarify the effect of different fertilizers on foxtail millet quality under low nitrogen conditions, we used JGNo.21 and LZGNo.2 as experimental materials and set up five treatments, including non-fertilization, nitrogen, phosphorus, compound, and organic fertilizers, to study the regulation of different fertilizer types on agronomic traits, nutrient fractions, and pasting characteristics of foxtail millet under low nitrogen conditions. Compared with the control, all of the fertilizers improved the agronomic traits of JGNo.21 to a certain extent. Nitrogen and compound fertilizer treatments reduced the starch content of JGNo.21; the starch content was reduced by 0.55% and 0.07% under nitrogen and compound fertilizers treatments. Phosphorus and organic fertilizers increased starch content, and starch content increased by 0.50% and 0.56% under phosphorus and organic fertilizer treatments. The effect of each fertilizer treatment on protein content was completely opposite to that of starch; different fertilizer treatments reduced the fat content of JGNo.21 and increased the fiber content. Among them, nitrogen and phosphorus fertilizers increased the yellow pigment content; the yellow pigment content increased by 1.21% and 2.64% under nitrogen and phosphorus fertilizer treatments. Organic and compound fertilizers reduced the content of yellow pigment; the yellow pigment content was reduced by 3.36% and 2.79% under organic and compound fertilizer treatments. Nitrogen and organic fertilizers increased the fat content of LZGNo.2; the fat content increased by 2.62% and 1.98% under nitrogen, organic fertilizer treatment. Compound and phosphorus fertilizer decreased the fat content; the fat content decreased by 2.16% and 2.90% under compound and phosphorus fertilizer treatment. Different fertilizer treatments reduced the cellulose and yellow pigment content of LZGNo.2. The content of essential, non-essential, and total amino acids of JGNo.21 was increased under compound and nitrogen fertilizer treatments and decreased under organic and phosphorus fertilizer treatments. The content of essential, non-essential, and total amino acids of LZGNo.2 was significantly higher under compound, nitrogen, and organic fertilizer treatments compared with control and significantly decreased under phosphorus fertilizer treatments. Nitrogen and compound fertilizer treatments significantly reduced the values of peak viscosity, trough viscosity, breakdown viscosity, final viscosity, setback viscosity, and pasting time of each index of JGNo.21; phosphorus and organic fertilizer treatments improved the values of each index. In contrast, the pasting viscosity of LZGNo.2 increased under phosphorus fertilizer treatment and decreased under nitrogen fertilizer treatment. Reasonable fertilization can improve the quality of foxtail millet, which provides a scientific theoretical basis for improving the quality of foxtail millet.
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Miklavčič Višnjevec, Ana, Paul Baker, Adam Charlton, Dave Preskett, Kelly Peeters, Črtomir Tavzes, Katja Kramberger, and Matthew Schwarzkopf. "Developing an Olive Biorefinery in Slovenia: Analysis of Phenolic Compounds Found in Olive Mill Pomace and Wastewater." Molecules 26, no. 1 (December 22, 2020): 7. http://dx.doi.org/10.3390/molecules26010007.
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The valorization of olive pomace through the extraction of phenolic compounds at an industrial scale is influenced by several factors that can have a significant impact on the feasibility of this approach. These include the types and levels of phenolic compounds that are present, the impact that seasonal variation and cultivar type have on the phenolic compound content in both olive pomace and mill effluents and the technological approach used to process the olive crop. Chemical analysis of phenolic compounds was performed using an HPLC-diode-array detector (DAD)-qTOF system, resulting in the identification of 45 compounds in olive mill wastewater and pomace, where secoiridoids comprised 50–60% of the total phenolic content. This study examined three different factors that could impact the phenolic compound content of these processing streams, including cultivar types typically grown on local farms in Slovenia, the type of downstream processing used and seasonality effects. Olive crop varieties sourced from local farms showed high variability, and the highest phenolic content was associated with the local variety “Istrska Belica”. During processing, the phenolic content was on average approximately 50% higher during two-phase decanting compared to three-phase decanting and the type of compound present significantly different. An investigation into the seasonal effects revealed that the phenolic content was 20% higher during the 2019 growing season compared to 2018. A larger sample size over additional growing seasons is required to fully understand the annual variation in phenolic compound content. The methods and results used in this study provide a basis for further analysis of phenolic compounds present in the European Union’s olive crop processing residues and will inform techno-economic modelling for the development of olive biorefineries in Slovenia.
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Simkova, Kristyna, Robert Veberic, Mariana Cecilia Grohar, Massimiliano Pelacci, Tina Smrke, Tea Ivancic, Aljaz Medic, Nika Cvelbar Weber, and Jerneja Jakopic. "Changes in the Aroma Profile and Phenolic Compound Contents of Different Strawberry Cultivars during Ripening." Plants 13, no. 10 (May 20, 2024): 1419. http://dx.doi.org/10.3390/plants13101419.
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Secondary metabolites, namely, phenolic and volatile organic compounds, contribute to the nutritional and organoleptic quality of the strawberry fruit. This study focuses on the changes in the content of phenolic compounds and volatile organic compounds during the ripening, from green to overripe fruit, of five strawberry cultivars (‘Asia’, ‘CIVN 766’, ‘Aprica’, ‘Clery’, and ‘Malwina’). Additionally, these changes are compared with the colour of the fruit and peroxidase and polyphenol oxidase activity. Our results show that the accumulation of secondary metabolites (phenolic and volatile organic compounds) significantly changed during the ripening process for all of the studied cultivars. As for phenolic compounds, flavanols and hydroxybenzoic acid derivatives comprised between 87 and 95% of the total phenolic compound content in unripe green fruit. In contrast, anthocyanins and hydroxycinnamic acid derivatives comprised between 64 and 77% of the total phenolic compound content in overripe fruit, except in the fruit of the cultivar ‘CIVN766’. When it comes to the aroma profile, the content of aldehydes decreased by 24–49% as the fruit ripened, and the accumulation of esters increased. Our study also shows that the ripening process differs among cultivars, and it is therefore necessary to define ripening indicators separately for each cultivar.
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Sivrikaya, Osman, and A. I. Arol. "ALTERNATIVE BINDERS TO BENTONITE FOR IRON ORE PELLETIZING: PART I: EFFECTS ON PHYSICAL AND MECHANICAL PROPERTIES." HOLOS 3 (July 3, 2014): 94. http://dx.doi.org/10.15628/holos.2014.1758.
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The use of conventional bentonite binder is favorable in terms of mechanical and metallurgical pellet properties, however, because of its acid constituents bentonite is considered as impurity especially for iron ores with high acidic content. Therefore, alternative binders to bentonite have been tested. Organic binders are the most studied binders and they yield pellets with good wet strength; they fail in terms of preheated and fired pellet strengths. This study was conducted to investigate how insufficient pellet strengths can be improved when organic binders are used as binder. The addition of a low-melting temperature and slag bonding/strength increasing constituent (free in acidic contents) into pellet feed was proposed. Addition of boron compounds such as colemanite, tincal, borax pentahydrate, boric acid together with organic binders such as CMC, starch, dextrin and some organic based binders, into iron oxide pellet was tested. Wet and thermally treated pellet physical-mechanical qualities (balling - moisture content - size - shape - drop number - compressive strengths - porosity - dustiness) were determined. The results showed that good quality wet, dry, preheated and fired pellets can be produced with combined binders (an organic binder plus a boron compound) when compared with bentonite-bonded pellets. While organic binders provided sufficient wet and dry pellet strengths, the boron compounds provided the required preheated and fired pellet strengths at even lower firing temperature. Especially, the contribution of boron compound addition is most pronounced for hematite pellets which do not have strengthening mechanism through oxidation like magnetite pellets during firing. Therefore, addition of boron compound is beneficial to recover the low physical-mechanical qualities of pellets produced with organic binders through slag bonding mechanism. Furthermore, lowering the firing temperature thanks to low-melting boron compounds will be cost-effective for firing part of the pelletizing plants.
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Orak, Hakime Hülya, Magdalena Karamać, Ryszard Amarowicz, Adnan Orak, and Kamila Penkacik. "Genotype-Related Differences in the Phenolic Compound Profile and Antioxidant Activity of Extracts from Olive (Olea europaea L.) Leaves." Molecules 24, no. 6 (March 21, 2019): 1130. http://dx.doi.org/10.3390/molecules24061130.
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The phenolic compound contents and antioxidant activities of the leaf extracts of nine olive genotypes were determined, and the obtained data were analysed using chemometric techniques. In the crude extracts, 12 compounds belonging to the secoiridoids, phenylethanoids, and flavonoids were identified. Oleuropein was the primary component for all genotypes, exhibiting a content of 21.0 to 98.0 mg/g extract. Hydroxytyrosol, verbascoside, luteolin 7-O-glucoside, and luteolin 4′-O-glucoside were also present in noticeable quantities. Genotypes differed to the greatest extent in the content of verbascoside (0.45–21.07 mg/g extract). The content of hydroxytyrosol ranged from 1.33 to 4.03 mg/g extract, and the aforementioned luteolin glucosides were present at 1.58–8.67 mg/g extract. The total phenolic content (TPC), DPPH• and ABTS•+ scavenging activities, ferric reducing antioxidant power (FRAP), and ability to inhibit the oxidation of -carotene-linoleic acid emulsion also varied significantly among genotypes. A hierarchical cluster analysis enabled the division of genotypes into three clusters with similarity above 60% in each group. GGE biplot analysis showed olive genotypes variability with respect to phenolic compound contents and antioxidant activities. Significant correlations among TPC, FRAP, the values of both radical scavenging assays, and the content of oleuropein were found. The contents of 7-O-glucoside and 4′-O-glucoside correlated with TPC, TEAC, FRAP, and the results of the emulsion oxidation assay.
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Zhou, Shiqi, Duo Feng, Yaxi Zhou, Hao Duan, Yue He, Yongjun Jiang, and Wenjie Yan. "Characteristic Volatile Organic Compound Analysis of Different Cistanches Based on HS-GC-IMS." Molecules 27, no. 20 (October 11, 2022): 6789. http://dx.doi.org/10.3390/molecules27206789.
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Cistanche is a medicinal and food homologous substance with a long history of consumption and medicinal use in China. In order to further understand the volatile organic compound differences between different cistanches, this study selected oil cistanche, blood cistanche and cistanche tubulosa in Xinjiang for HS-GC-IMS volatile organic compounds, and established the characteristic fingerprints of different cistanches for organic content and characteristic organic compound analysis. PCA and cluster analysis were used to study the similarity between different cistanches. After qualitative analysis, a total of 32 volatile organic compounds were identified, covering aldehydes (17), ketones (5), furans (1), alcohols (5), lactones (1) and esters (3), and the volatile organic compounds between samples a, b and c could be significantly distinguished, affecting the flavor of cistanche itself. It provides a basic theoretical basis for the study of cistanche flavor.
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Cruz-Carrión, Álvaro, Ma Josefina Ruiz de Azua, Begoña Muguerza, Miquel Mulero, Francisca Isabel Bravo, Anna Arola-Arnal, and Manuel Suarez. "Organic vs. Non-Organic Plant-Based Foods—A Comparative Study on Phenolic Content and Antioxidant Capacity." Plants 12, no. 1 (January 1, 2023): 183. http://dx.doi.org/10.3390/plants12010183.
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A plant’s stress response involves the production of phytochemicals, including phenolic compounds. Their synthesis can be modulated by organic (ORG) or non-organic (NORG) farming systems in which they are grown. To examine this issue, thirteen plant-based foods cultivated in ORG and NORG systems were compared in terms of antioxidant capacity, total content of phenolics, anthocyanins, flavan-3-ols and flavonols. The results showed that NORG fruits tended to have higher phenolic compounds content, whereas ORG fruits had more antioxidant capacity. NORG legume stood out for having higher values from all the parameters analyzed in comparison to its ORG equivalent. ORG nuts showed more flavan-3-ols and flavonols than their NORG counterparts, nonetheless, tended to be less antioxidant. ORG vegetables displayed higher phenolics and anthocyanins, which reflected in higher antioxidant capacity than NORG ones. These findings suggest that farming systems differentially modulate phenolic compound composition and antioxidant capacity based on the plant species studied.
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Shea, Patrick J. "Role of Humified Organic Matter in Herbicide Adsorption." Weed Technology 3, no. 1 (March 1989): 190–97. http://dx.doi.org/10.1017/s0890037x00031614.
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Organic matter is the soil constituent most often associated with herbicide adsorption. Structural diversity makes humified organic material an ideal substrate for the adsorption of many pesticides, but variability in composition and distribution in situ complicates interpretation of its quantitative effect on adsorption. Variability in the adsorption distribution coefficient (KD) of a herbicide among soils often is due to differences in organic matter content and can be reduced by adjusting KDfor soil organic carbon content and computing the organic carbon partition coefficient (Koc). Koccan be estimated from the octanol-water partition coefficient (Kow) of organic compounds, but the correlation weakens as compound polarity increases. Kocalso can be correlated with aqueous solubility if a correction is made for the melting point of compounds that are solids at 25 C. Relative adsorption can be estimated from parachor and molecular connectivity indices; but corrections are needed for polar compounds, and correlations with KDor Kochave been variable. Such predictive methods may be useful for broad classification purposes, but accurate extrapolation generally requires site-specific adsorption measurements. Empirical models which accommodate the multiple regression of organic matter content and other soil properties such as clay content, pH, and cation exchange capacity on herbicide adsorption can increase accuracy, but interpretation may be restricted to a small number of sites.
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Matłok, Natalia, Józef Gorzelany, Agnieszka Ewa Stępień, Adam Figiel, and Maciej Balawejder. "Effect of Fertilization in Selected Phytometric Features and Contents of Bioactive Compounds in Dry Matter of Two Varieties of Basil (Ocimum basilicum L.)." Sustainability 11, no. 23 (November 22, 2019): 6590. http://dx.doi.org/10.3390/su11236590.
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This study investigated the effects of sustainable, organic and standard mineral fertilization in selected phytometric features and contents of bioactive compounds in dry matter of two varieties of Ocimum basilicum L. The herbal material was first examined for its phytometric characterisation and then subjected to the combined convective pre-drying and vacuum-microwave finish drying method (CPD-VMFD). The energy consumption for the drying process of plant material in the case of CPD-VMFD is lower in comparison to the convection method (CD). The obtained dry material was assessed for determination of the colour parameters. Next, the analysis to identify the total content of polyphenols and the antioxidant properties (ABTS) was done. The dried material was subjected to head space–solid phase microextraction (HS-SPME) to determine volatile compound content. The herbal material obtained from the basil cultivated with an addition of sustainable, organic fertilizer was found to have a significantly higher content of bioactive compounds than the control, especially of polyphenols and volatile compounds like eucalyptol. Presumably, this is an effect of the elicitation process resulting from the fact that extract from common nettle was applied as an organic fertilizer component.
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Juswardi, Juswardi, and Salsabila Ulya. "Content of Chlorophyll, Antioxidants, and Metabolite Compounds in the Leaf Development Stage of Murraya koenigii (L.) Spreng." Jurnal Biologi Tropis 23, no. 3 (June 12, 2023): 225–30. http://dx.doi.org/10.29303/jbt.v23i3.4869.
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Murraya koenigii (L.) Spreng is often known as Temurui or Curry as a local name in Indonesia, and has long been used in medicine and has as a potential as a multi-medicinal plant. Temurui as a producer of bioactivity has the antioxidant properties. This is due to the presence of metabolite compounds contained in the leaves of the Temurui plant. Leaves are organs that are always growing where chemical components such as chlorophyll in the leaves will also develop thereby affecting leaf metabolism in plants. This study aims to determine the contens of chlorophyll, contens of antioxidants and metabolite compounds in Temurui leaves at the level of leaf development. Different leaf extractions are also used to measure the antioxidant, chlorophyll content and metabolite compounds found in Temurui leaves. The research results obtained on young, and old Temurui leaves obtained a total of 3 groups of dominant compounds, terpenoids, organic acids and esters, and mature leaves not find ester compound. The level of leaf development affects the contents of antioxidants and chlorophyll contents. Chlorophyll content in mature leaves was 44.60ug/ml, young leaves were 41.28ug/ml and old leaves were 30.27ug/ml while antioxidant contents in young leaves were 8.949ppm, mature leaves were 8.85ppm and old leaves were 8.429ppm.
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Sun, Shi Jing, and Jun Shen. "Study on Reducing the Volatile Organic Compounds Emissions from Different Processing Particleboards." Advanced Materials Research 113-116 (June 2010): 1101–5. http://dx.doi.org/10.4028/www.scientific.net/amr.113-116.1101.
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The aim of this paper is to study on how to control VOC emissions from wood-based panel manufacturing. Total volatile organic compounds (TVOC) emissions from larch particleboard under different processing conditions were collected by an environmental chamber. VOC samples were prepared by desiccator, adsorbed by activated carbon, desorpted with Methylene dichloride and measured by GC/MS. The result showed that the optimal process parameters were single-layer structure, moisture content of 6%, density of 0.60 g•cm-3, thickness of 8mm, resin content of 7%, hot-pressing time of 4min.TVOC increased with board density going up，hot-pressing time increasing, moisture content and resin content rising. The predominant compounds emissions from the particleboards are aromatic compound and hydrocarbon. 24 kinds of compounds were identified from the standard board. With hydrocarbon decreasing, aromatic VOC type increased.
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Mielcarek, Artur, Kamil Łukasz Bryszewski, Joanna Rodziewicz, Karolina Kłobukowska, and Wojciech Janczukowicz. "Phosphorus Removal Rate and Efficiency in an Electrochemical Sequencing Reactor for the Treatment of Wastewater with Low Organic Carbon Content." Energies 17, no. 6 (March 12, 2024): 1352. http://dx.doi.org/10.3390/en17061352.
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Energy is essential for the operation of wastewater treatment systems. Simultaneously, it can be a factor facilitating the electrochemical purification processes. Previous studies have shown that under specific conditions, there is no technological justification for using bio-electrochemical reactors designed for the simultaneous removal of both phosphorus and nitrogen compounds. This is because similar dephosphatation process effects can be achieved in an electrochemical reactor. Additionally, in a bio-electrochemical reactor, a portion of the organic substrate introduced for biological treatment is lost due to the electrocoagulation process. The aim of the research was to determine the influence of low direct current densities (0.4–2.0 A/m2) on the rate and efficiency of phosphorus and other compound removal in a sequencing electrochemical reactor treating real wastewater from a greenhouse with low organic compound content. In the conducted studies, an increase in electric current density resulted in an increase in the removal rates of phosphorus from 26.45 to 34.79 mg/L·h, nitrogen from 2.07 to 6.58 mg/L·h, and organic compounds from 0.44 to 1.50 mg/L·h. This corresponded to maximum removal efficiencies of 88.6 ± 2.5% for phosphorus, 7.4 ± 2.5% for nitrogen, and 51.1 ± 8.3% for organic compounds. As a result of electrocoagulation, sludge rich in phosphorus was obtained, ranging from 347 ± 38 mg/L (18.1% P) to 665 ± 36 mg/L (11.7% P). The obtained results can be utilized in the future for the development of two-stage systems for wastewater treatment with a low content of organic compounds, aiming at the removal of phosphorus and nitrogen.
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Beaver, M. R., M. J. Elrod, R. M. Garland, and M. A. Tolbert. "Ice nucleation in sulfuric acid/organic aerosols: implications for cirrus cloud formation." Atmospheric Chemistry and Physics Discussions 6, no. 2 (March 28, 2006): 2059–90. http://dx.doi.org/10.5194/acpd-6-2059-2006.
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Abstract. Using an aerosol flow tube apparatus, we have studied the effects of aliphatic aldehydes (C3 to C10) and ketones (C3 and C9) on ice nucleation in sulfuric acid aerosols. Mixed aerosols were prepared by combining an organic vapor flow with a flow of sulfuric acid aerosols over a small mixing time (~60 s) at room temperature. No acid-catalyzed reactions were observed under these conditions, and physical uptake was responsible for the organic content of the sulfuric acid aerosols. In these experiments, aerosol organic content, determined by a Mie scattering analysis, was found to vary with the partial pressure of organic, the flow tube temperature, and the identity of the organic compound. The physical properties of the organic compounds (primarily the solubility and melting point) were found to play a dominant role in determining the mode of nucleation (homogenous or heterogeneous) and the specific freezing temperatures observed. Overall, very soluble, low-melting organics, such as acetone and propanal, caused a decrease in aerosol ice nucleation temperatures when compared with aqueous sulfuric acid aerosol. In contrast, sulfuric acid particles exposed to organic compounds of eight carbons and greater, of much lower solubility and higher melting temperatures, nucleate ice at temperatures above aqueous sulfuric acid aerosols. Organic compounds of intermediate carbon chain length, C4-C7, (of intermediate solubility and melting temperatures) nucleated ice at the same temperature as aqueous sulfuric acid aerosols. Interpretations and implications of these results for cirrus cloud formation are discussed.
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Beaver, M. R., M. J. Elrod, R. M. Garland, and M. A. Tolbert. "Ice nucleation in sulfuric acid/organic aerosols: implications for cirrus cloud formation." Atmospheric Chemistry and Physics 6, no. 11 (August 4, 2006): 3231–42. http://dx.doi.org/10.5194/acp-6-3231-2006.
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Abstract. Using an aerosol flow tube apparatus, we have studied the effects of aliphatic aldehydes (C3 to C10) and ketones (C3 and C9) on ice nucleation in sulfuric acid aerosols. Mixed aerosols were prepared by combining an organic vapor flow with a flow of sulfuric acid aerosols over a small mixing time (~60 s) at room temperature. No acid-catalyzed reactions were observed under these conditions, and physical uptake was responsible for the organic content of the sulfuric acid aerosols. In these experiments, aerosol organic content, determined by a Mie scattering analysis, was found to vary with the partial pressure of organic, the flow tube temperature, and the identity of the organic compound. The physical properties of the organic compounds (primarily the solubility and melting point) were found to play a dominant role in determining the inferred mode of nucleation (homogenous or heterogeneous) and the specific freezing temperatures observed. Overall, very soluble, low-melting organics, such as acetone and propanal, caused a decrease in aerosol ice nucleation temperatures when compared with aqueous sulfuric acid aerosol. In contrast, sulfuric acid particles exposed to organic compounds of eight carbons and greater, of much lower solubility and higher melting temperatures, nucleate ice at temperatures above aqueous sulfuric acid aerosols. Organic compounds of intermediate carbon chain length, C4-C7, (of intermediate solubility and melting temperatures) nucleated ice at the same temperature as aqueous sulfuric acid aerosols. Interpretations and implications of these results for cirrus cloud formation are discussed.
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Kremer, Dario, Renata Jurišić Grubešić, Dalibor Ballian, Danijela Stešević, Ivan Kosalec, Jadranka Vuković Rodríguez, Marija Vukobratović, and Siniša Srečec. "Influence of Soil Traits on Polyphenols Level in Moltkia petraea (Tratt.) Griseb. (Boraginaceae)." Acta Botanica Croatica 75, no. 2 (October 1, 2016): 266–71. http://dx.doi.org/10.1515/botcro-2016-0026.
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Abstract The Illyric–Balkan endemic species Moltkia petraea (Tratt.) Griseb. is very interesting as a potential horticultural and medicinal plant. The aim of this study was to investigate soil conditions of M. petraea habitats, the phenolic content in plant parts, and the influence of soil properties on the phenolic contents. The results were evaluated using Spearman rank order correlations. Analyzed soil samples contained very low to intermediate levels of physiologically active phosphorus, but were very rich in potash. Organic matter content of soil was high. Phenolic compound content was higher in leaves than in flowers or stems. The analyses showed that M. petraea possesses considerable quantities of phenolic compounds and has no specific demands for particular soil conditions. A negative correlation was found between soil phosphorus content and total phenols content in leaves and stems, and with the total phenolic acids content in flowers. Organic matter in soil also found to have a negative influence on total tannins content in stems. Among the tested geographical locations, the Mljet population showed a higher degree of separation from the remaining locations.
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Hallmann, Ewelina, Anna Rusaczonek, Ewa Muszyńska, Daniel Ziółkowski, Sebastian Kuliński, Jakub Jasek, and Alicja Ponder. "A Long-Term Study on Chemical Compounds and Their Location in Sweet Basil Leaves from Organic and Conventional Producers." Foods 13, no. 3 (January 24, 2024): 383. http://dx.doi.org/10.3390/foods13030383.
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Bioactive compound profiles in organic and conventional sweet basil were analyzed by HPLC, and the enzymatic status and antioxidant status of plants cultivated with the two systems were also examined. Fluorescence microscopy was used for the determination of compounds’ locations in the basil leaves. The experiment was conducted from 2019 to 2021. Organic and conventional basil samples were obtained directly from Polish herb producers. The results showed that the chemical profiles of organic and conventional basil leaves are different. Not only the cultivation method but also the experimental year had a significant impact on the antioxidant content in basil leaves. Organic basil contained significantly more dry matter (11.97 g 100 g−1 FW) compared to conventional one (10.54 g 100 g−1 FW) and a higher tendency for total phenolic compounds (5.24 mg g −1 DW) accumulation. The higher bioactive compound content reflects the antioxidant activity (61.0%, 54.33%, and 46%) in organic basil compared to conventional (46.87%, 38.055, and 39.24%) with respect to the analysis method (ABTS, DPPH, and FRAP). Catalase activity (39 µmol H2O2 min−1 mg−1) in organic basil was higher compared to conventional (23.19 µmol H2O2 min−1 mg−1) ones. The obtained results are very unique and could be used by herb producers as a key for high-quality basil production. The higher concentration of bioactive compounds in organic basil gives a better nutraceutical status to this popular herb.
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Nugraheni, M., Windarwati, and S. Palupi. "Gluten-free noodles made based on germinated organic red rice: chemical composition, bioactive compounds, antioxidant activity and sensory evaluation." Food Research 6, no. 4 (August 26, 2022): 354–63. http://dx.doi.org/10.26656/fr.2017.6(4).506.
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The purpose of this research was to find out the chemical composition, bioactive compound content, antioxidant activity, and sensory evaluation of gluten-free noodles made from organic red rice. The study was carried out by creating three formulations using germinated organic red rice flour, germinated Vigna radiata flour, and tapioca flour. Proximate analysis, resistant starch and dietary fibre were used to analyze the chemical composition. Phenolic and flavonoid compounds were among the bioactive compounds studied. The DPPH method was used to assess antioxidant activity. The findings revealed that all three formulations of gluten-free organic red rice noodles, formulations I, II, and III, had high fibre content, resistant starch, bioactive compounds, and antioxidant activity. According to sensory evaluation, gluten-free organic red rice noodles formulation I have the highest acceptance rate compared to organic red rice noodles formulations II and III. The amount of soluble dietary fibre was 0.79±0.08%, the amount of insoluble dietary fibre was 6.73±0.18%, and the amount of resistant starch was 7.56±0.02%. Total phenolics content (TPC) was 49.16±0.27%, total flavonoids content (TFC) was 53.36±0.86%, and the IC50 was 9665.84±72.39. The content of bioactive compounds and the IC50 of glutenfree organic red rice noodles have a significant and positive correlation. According to the study's findings, gluten-free organic red rice noodle formulation could be developed as a functional food high in dietary fibre, resistant starch, and antioxidants.
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Carlsson, Josefine, Francesco Iadaresta, Jonas Eklund, Rozanna Avagyan, Conny Östman, and Ulrika Nilsson. "Suspect and non-target screening of chemicals in clothing textiles by reversed-phase liquid chromatography/hybrid quadrupole-Orbitrap mass spectrometry." Analytical and Bioanalytical Chemistry 414, no. 3 (November 16, 2021): 1403–13. http://dx.doi.org/10.1007/s00216-021-03766-x.
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AbstractThe global manufacturing of clothing is usually composed of multistep processes, which include a large number of chemicals. However, there is generally no information regarding the chemical content remaining in the finished clothes. Clothes in close and prolonged skin contact may thus be a significant source of daily human exposure to hazardous compounds depending on their ability to migrate from the textiles and be absorbed by the skin. In the present study, twenty-four imported garments on the Swedish market were investigated with respect to their content of organic compounds, using a screening workflow. Reversed-phase liquid chromatography coupled to electrospray ionization/high-resolution mass spectrometry was used for both suspect and non-target screening. The most frequently detected compound was benzothiazole followed by quinoline. Nitroanilines with suspected mutagenic and possible skin sensitization properties, and quinoline, a carcinogenic compound, were among the compounds occurring at the highest concentrations. In some garments, the level of quinoline was estimated to be close to or higher than 50,000 ng/g, the limit set by the REACH regulation. Other detected compounds were acridine, benzotriazoles, benzothiazoles, phthalates, nitrophenols, and organophosphates. Several of the identified compounds have logP and molecular weight values enabling skin uptake. This pilot study indicates which chemicals and compound classes should be prioritized for future quantitative surveys and control of the chemical content in clothing as well as research on skin transfer, skin absorption, and systemic exposure. The results also show that the current control and prevention from chemicals in imported garments on the Swedish market is insufficient. Graphical abstract
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T., Bedernichek, and Рartyka Т. "Content of water-soluble carbohydrates as a quality indicator of cryogenic soils." Proceedings of the State Natural History Museum, no. 34 (November 20, 2019): 43–48. http://dx.doi.org/10.36885/nzdpm.2018.34.43-48.
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The content of water-soluble organic matter in the soil is an important indicator of its quality and affects physical, chemical and biological properties of soil. This indicator is widely used for assessment of most zonal soils. However, in some cases, accumulation rates of water-soluble organic compounds in soil may significantly exceed the rate of their destruction. If so, it is more important to quantify not only the fraction of water-soluble organic matter as a whole but also to determine its composition. In this context, it is important to determine the content of the most labile and available for microorganisms compound – water-soluble carbohydrates. In this paper, the content of water-soluble carbohydrates and water-soluble organic matter in soils of Coastal Antarctica was estimated. Soils under three different plant communities were studied. We found that water-soluble organic matter of studied soils may contain up to 50% of carbohydrates. Hence, further research is needed to study other soils of Coastal Antarctica to determine their vulnerability to global climate change
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Blanchet, L., A. Smolinska, A. Baranska, E. Tigchelaar, M. Swertz, A. Zhernakova, J. W. Dallinga, C. Wijmenga, and F. J. van Schooten. "Factors that influence the volatile organic compound content in human breath." Journal of Breath Research 11, no. 1 (February 22, 2017): 016013. http://dx.doi.org/10.1088/1752-7163/aa5cc5.
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Pawluczuk, Jan, and Arkadiusz Stępień. "Dynamics of Organic Nitrogen Compound Mineralization in Organic Soils under Grassland, and the Mineral N Concentration in Groundwater (A Case Study of the Mazurian Lake District, Poland)." Sustainability 15, no. 3 (February 1, 2023): 2639. http://dx.doi.org/10.3390/su15032639.
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Peatlands serve numerous functions, with one of the main ones being the retention of nutrients, including mineral nitrogen. A field study in organic soils was carried out in the Mazurian Lake District situated in north-eastern Poland (53°37′50′ N, 20°28′51′ E). In the test peat soils, the rate of organic nitrogen compound mineralization varied significantly depending on the season. The dynamics of the organic matter mineralization process were most strongly influenced by the soil use and the season. The mineral N release was higher in organic soil under intensively used grassland. In this soil, much more mineral nitrogen was released during the summer and spring periods. The dominant form in the organic nitrogen compound mineralization processes was N-NO3. The highest dynamics of the organic nitrogen compound mineralization were noted at a soil moisture content ranging from 57% to 59%. The interdependence of the soil moisture content and the rate of organic nitrogen compound mineralization fluctuated over the study period, with an increase in spring and a decrease in summer. A correlation was demonstrated between the nitrate form content in the peat soils under intensive cultivation and the nitrate-nitrogen concentration in groundwater, while no correlation was demonstrated between the N-NO3 content in the soils under a forest and the N-NO3 concentration in the groundwater of these soils. The results provide the basis for the conclusion that the land use type (forest, grassland), which determines the morphological structure of organic soils, affects the intensity of the infiltration of different mineral nitrogen forms.
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Sokół-Łętowska, Anna, Alicja Z. Kucharska, Grzegorz Hodun, and Marta Gołba. "Chemical Composition of 21 Cultivars of Sour Cherry (Prunus cerasus) Fruit Cultivated in Poland." Molecules 25, no. 19 (October 8, 2020): 4587. http://dx.doi.org/10.3390/molecules25194587.
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Sour cherry (Prunus cerasus L.) is a very important fruit crop for producers as well as consumers. To obtain information on sour cherry fruit, we determined the sugar and organic acid composition and phenolic compound contents of twenty-one cultivars and genotypes of Prunus cerasus L. by HPLC quantification. Antioxidant capacity was determined by DPPH radical scavenging, reducing power (FRAP) and determination of substances reacting with Folin–Ciocalteu reagent (FCRS). The main organic acids in sour cherries were malic and malonic acids, and the main sugars were glucose and fructose. The highest sugar content was found in the “Lucyna” cultivar and the highest organic acids in “Paraszt Meggy” and “Suda Hardy”. The richest in phenolic compounds were “Wieluń 17”, “Sokówka Nowotomyska”, “Grosenkirch” “Sokówka Nowotomyska” “Grosenkirch” (anthocyanins, flavanols and total phenolics), and “Meteor” (phenolic acids). Flavan 3-ols were not quantified in every cultivar. “Dradem, “Turgieniewka”, “Wróble”, and “Nana” contained the smallest amounts of phenolic compounds. Antioxidant capacity was highly correlated with phenolic compound composition. According to principal component analysis (PCA), it was concluded that cultivars whose harvest maturity was medium to late contained more flavonols and anthocyanins and were characterized by higher antioxidant capacity than those whose harvest maturity was classified as early or early to medium.
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Frías-Moreno, María Noemí, Rafael A. Parra-Quezada, Gustavo González-Aguilar, Jacqueline Ruíz-Canizales, Francisco Javier Molina-Corral, David R. Sepulveda, Nora Salas-Salazar, and Guadalupe I. Olivas. "Quality, Bioactive Compounds, Antioxidant Capacity, and Enzymes of Raspberries at Different Maturity Stages, Effects of Organic vs. Conventional Fertilization." Foods 10, no. 5 (April 27, 2021): 953. http://dx.doi.org/10.3390/foods10050953.
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Raspberries are important sources of bioactive compounds, whose synthesis is influenced by the fertilization system and the maturity stage. This study evaluated the effect of organic and conventional fertilization systems on raspberries at three maturity stages, pink, ripe, and overripe. Physicochemical characteristics, bioactive compounds (phenolic profile, vitamin C), antioxidant capacity (DPPH, FRAP, TEAC, and ORAC), phenolic-associated enzyme, phenylalanine ammonia lyase (PAL), and antioxidant enzymes (SOD, CAT, GPx, and APX) were evaluated. The physicochemical determination of the fruit did not reveal differences between fertilization systems. Regarding bioactive compounds, higher content of anthocyanins was found in organic raspberries at all maturity stages. Organic fertilization increased the content of ellagic acid and gallic acid at all stages of maturity. Higher content of caffeic, hydroxybenzoic, protocatechuic acid, and vitamin C was observed in organic raspberry at the overripe stage. Raspberries grown with organic fertilization exhibited higher values of antioxidant capacity by the DPPH, FRAP, and TEAC methods at all maturity stages. Raspberries under organic fertilization showed significantly greater activity of CAT, SOD, APX, GPX, and PAL. The present study suggests that organic fertilization induces oxidative stress causing an increase in antioxidant defense mechanisms, enhancing bioactive compound production, and improving antioxidant capacity in raspberries.
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Campos, Olivia Pak, Flávia Maria Leme, Gabriel Cássia Fortuna, Jordany Aparecida de Oliveira Gomes, Caio Scardini Neves, Rosani do Carmo de Oliveira Arruda, and Filipe Pereira Giardini Bonfim. "Morphological characteristics, trichomes, and phytochemistry of inflorescences of Humulus lupulus L: Comparison of cropping systems and varieties." March 2023, no. 17(03):2023 (March 3, 2023): 263–74. http://dx.doi.org/10.21475/ajcs.23.17.03.p3754.
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This study aimed to assess the influence of cropping systems (conventional and organic) and hops varieties ('Cascade', 'Chinook', 'Columbus', 'Hallertau Mittelfrüh', and 'Nugget') on morphological and anatomical aspects, as well as the contents of essential oil and phenolic compounds of hops inflorescences. Thus, morphological description and cone length; identification of trichomes and peltate glandular trichome density; anatomical and histochemical analysis of peltate glandular trichomes; essential oil content; and total phenolic compound content were evaluated. The results showed no influence of treatments on morphology; however, higher cone lengths were observed in organic cropping and in ‘Cascade’ and ‘Chinook’. These results report the first record of hops trichomes grown in Brazil. Three types of trichomes were identified in inflorescences: nonglandular, peltate, and bulbous glandular. An intense presence of peltate trichomes was observed on flowers. The trichome density in bracts differed among varieties, and 'Cascade' had the highest mean (8.19). There was a significant interaction between cropping systems and varieties for trichome density in flowers: with the exception of 'Nugget' (59.50), the varieties had higher means under organic cropping, especially 'Hallertau Mittelfrüh' (92.12) and 'Chinook' (88.12). Histochemical analysis revealed the presence of polysaccharides, starch, lipids, phenolic compounds, and proteins in peltate trichomes. The cropping systems did not affect the oil content, although there were significant differences between varieties. 'Hallertau Mittelfrüh' showed the lowest oil content (0.25%). Phenolic compounds showed no effect of treatments. Therefore, the results indicate that organic cropping and the 'Cascade' and 'Chinook' varieties are more promising under the conditions studied
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Gecer, Mustafa Kenan, Erdal Orman, Muttalip Gundogdu, Sezai Ercisli, and Rohini Karunakaran. "Identification of Metabolites Changes and Quality in Strawberry Fruit: Effect of Cultivation in High Tunnel and Open Field." Plants 11, no. 10 (May 21, 2022): 1368. http://dx.doi.org/10.3390/plants11101368.
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Strawberry has gained increasing popularity all over the world due to its fruit properties. This popularity is due to the phytochemicals that strawberries have. The aim of this study is to reveal the effect of cultivation in open field and high tunnel on agromorphological and biochemical properties of strawberries. In this study, fruit yield and fruit quality characteristics of some strawberry varieties grown in open field and high tunnel were investigated. The highest fruit yield, fruit weight and titratable acidity were obtained in high tunnel grown Albion cultivar (542.743 g/plant, 14.927 g/fruit and 1.047%, respectively). While there was no statistical difference between cultivars and treatments in terms of soluble solids content and pH, fruit count was higher in Albion and Kabarla cultivars in both treatments compared to other cultivars (p < 0.05). Among the phenolic compounds, gallic acid was determined to be higher (between 9.246–31.680 mg/100 g) than other phenolics. Considering the organic acid content, malic acid was determined as the dominant organic acid in Kabarla cultivar (870.729 mg/100 g). In addition, in terms of vitamin C content, Rubygem cultivar stood out in both applications. Phenolic compound and organic acid contents varied in terms of varieties and applications. As a result, strawberry fruit, which is an important fruit in terms of fruit quality and consumption diversity, has been found to have high phenolic compounds and organic acid content, although it varies in all varieties and applications.
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Shi, Lisheng, Jiayan Ge, Shuangxi Nie, Chengrong Qin, and Shuangquan Yao. "Effect of lignin structure on adsorbable organic halogens formation in chlorine dioxide bleaching." Royal Society Open Science 6, no. 2 (February 2019): 182024. http://dx.doi.org/10.1098/rsos.182024.
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Adsorbable organic halogens (AOX) are formed in pulp bleaching as a result of the reaction of residual lignin with chlorine dioxide. The natural structure of lignin is very complex and it tends to be damaged by various extraction methods. All the factors can affect the study about the mechanism of AOX formation in the reaction of lignin with chlorine dioxide. Lignin model compounds, with certain structures, can be used to study the role of different lignin structures on AOX formation. The effect of lignin structure on AOX formation was determined by reacting phenolic and non-phenolic lignin model compound with a chlorine dioxide solution. Vanillyl alcohol (VA) and veratryl alcohol (VE) were selected for the phenolic and non-phenolic lignin model compound, respectively. The pattern consumption of lignin model compounds suggests that both VA and VE began reacting with chlorine dioxide within 10 min and then gradually steadied. The volume of AOX produced by VE was significantly higher than that produced by VA for a given initial lignin model compound concentration. In a solution containing a combination of VA and VE in chlorine dioxide, VE was the dominant producer of AOX. This result indicates that the non-phenolic lignin structure was more easily chlorinated, while the phenolic lignin structure was mainly oxidized. In addition, AOX content produced in the combined experiments exceeded the total content of the two separate experiments. It suggested that the combination of phenolic and non-phenolic lignin structure can promote AOX formation.
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Qi, Wang, Lim Fang Yee, and Hu Jiangyong. "Relationship between organic precursors and N-nitrosodimethylamine (NDMA) formation in tropical water sources." Journal of Water and Health 12, no. 4 (July 14, 2014): 736–46. http://dx.doi.org/10.2166/wh.2014.117.
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The presence of organic compounds in water sources is one of the concerns in water treatment. They are potential precursors of disinfection byproducts (DBPs) and thus induce health problems in humans. Among the emerging DBPs, carcinogenic compound N-nitrosodimethylamine (NDMA) has been receiving attention during the last decade. This study examined the characteristics of organic components in various water sources and investigated their relationships with NDMA formation. Experiments were carried out on selected water samples from both natural water and wastewater. Results showed similar NDMA formation kinetics for both water sources. However, more contribution of NDMA precursors was found to be from the wastewater due to its higher organic nitrogen content. NDMA formation potential (NDMAFP) of secondary effluent ranged from 264 to 530 ng/L. A correlation study between organic compound characteristics and NDMAFP indicated that the majority of NDMA precursors came from dissolved organic nitrogen (DON) compound with small molecular weight (smaller than 500 Da), with correlation R2 = 0.898. Although secondary treatment removed more than 90% of NDMA precursors, the remaining precursors in secondary effluent would still pose a challenge for water quality.
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Yildiz, Elif. "Characterization of Fruit Vinegars via Bioactive and Organic Acid Profile Using Chemometrics." Foods 12, no. 20 (October 13, 2023): 3769. http://dx.doi.org/10.3390/foods12203769.
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Vinegar has been known as a traditional remedy since ancient times. In addition to being used as a flavoring and aroma enhancer in world cuisines, it has attracted more and more attention due to its bioactive potential and health properties. Although the most common use is apple cider vinegar together with grape vinegar, vinegar produced from red fruits has come to the fore due to their health purposes. Rosehip, pomegranate, fig, guelder-rose, blackberry, raspberry, and blueberry vinegars were evaluated regarding the organic acid content, phenolic compound content, and bioactive potential to assess their health potential and associated contents. Acetic acid, citric acid, succinic acid, and malic acid were determined as prominent organic acids in the vinegar samples. In contrast, gallic acid, vanillic acid, protocatechuic acid, and ferulic acid were dominant regarding phenolic compounds. Raspberry, guelder-rose, and pomegranate vinegars came forth regarding their bioactive content and potential. The discriminative parameters of the vinegar samples were pH, total acidity, dL-isocitric acid, gallic acid, and hydroxybenzoic acid. Fruit vinegars were determined to have a notable bioactive content compared to apple and grape vinegars. The use of these vulnerable bioactive materials in vinegar fermentation could provide an effective way for nutrition and raw material resourcing.
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Rachtan-Janicka, Joanna, Alicja Ponder, and Ewelina Hallmann. "The Effect of Organic and Conventional Cultivations on Antioxidants Content in Blackcurrant (Ribes nigrum L.) Species." Applied Sciences 11, no. 11 (May 31, 2021): 5113. http://dx.doi.org/10.3390/app11115113.
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The number of consumers seeking safe and health-beneficial foods is systematically increasing. Consumers demand more environmentally friendly and safe food options coming from organic farming. Blackcurrants fruits are a perfect source of biological active compounds, such as vitamin C, polyphenols and flavonoids as well anthocyanins. Organic agricultural practices have modified the level of bioactive compounds in blackcurrant fruits. The novelty and the aim of the presented study was to compare the concentrations of selected health-promoting antioxidants in fruits of three blackcurrants (‘Ben Adler’, ‘Tiben’ and ‘Titania’) grown in organic and conventional orchards in Poland. For bioactive compound determination, the high-performance liquid chromatography (HPLC) method was used. The obtained results showed that organic blackcurrant fruits contained significantly more vitamin C (9.4 mg/100 g f.w.), total polyphenols (189.2 mg/100 g f.w.), total phenolic acids (10.3 mg/100 g f.w.), and total flavonoids (178.8 mg/100 g f.w.), as well anthocyanins (167.9 mg/100 g f.w.), compared to conventional ones. The selected cultivars and the years of cultivation system affect the concentration of the measured polyphenols, with strong interactions between these factors. The experiment confirms the hypothesis that organic blackcurrants should be a very important part of well-balanced, healthy diet.
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Laukalēja, Ilze, Zanda Krūma, and Ingmars Cinkmanis. "Impact of The Roast Level on Chemical Composition of Coffee from Colombia." Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences. 76, no. 1 (February 1, 2022): 145–51. http://dx.doi.org/10.2478/prolas-2022-0022.
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Abstract During the roasting process, a cascade of chemical reactions occur, from which non-volatile compounds degrade and form new compounds with potential aroma attributes. Considering that the roasting process significantly influences the biologically active compound concentration and some unwanted compound formation, such as acrylamide, it is crucial to understand the roasting process from both positive and negative aspects. The aim of this study was to evaluate the chemical composition changes in different roast level coffee samples from Colombia. The moisture, pH, acrylamide, total phenolic, and flavonoid content, and the volatile compound profile were analysed for coffee samples roasted at three different roast levels (light, medium, dark). The results showed a decrease of total phenolic and flavonoid concentration with increased roast level. Acrylamide concentration reached the highest peak in the medium roasted and the lowest in dark roasted coffee. With increasing roast level, the volatile organic acid concentration decreased, while furan and phenol compound concentration increased in the dark roasted coffee. Dark roasted coffee had the lowest acrylamide and organic acid concentration, and the highest pH in brew, which would be more suitable for coffee consumers with a sensitive stomach.
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Karadima, Katerina S., Vlasis G. Mavrantzas, and Spyros N. Pandis. "Insights into the morphology of multicomponent organic and inorganic aerosols from molecular dynamics simulations." Atmospheric Chemistry and Physics 19, no. 8 (April 29, 2019): 5571–87. http://dx.doi.org/10.5194/acp-19-5571-2019.
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Abstract. We explore the morphologies of multicomponent nanoparticles through atomistic molecular dynamics simulations under atmospherically relevant conditions. The particles investigated consist of both organic (cis-pinonic acid – CPA, 3-methyl-1,2,3-butanetricarboxylic acid – MBTCA, n-C20H42, n-C24H50, n-C30H62 or mixtures thereof) and inorganic (sulfate, ammonium and water) compounds. The effects of relative humidity, organic mass content and type of organic compound present in the nanoparticle are investigated. Phase separation is predicted for almost all simulated nanoparticles either between organics and inorganics or between hydrophobic and hydrophilic constituents. For oxygenated organics, our simulations predict an enrichment of the nanoparticle surface in organics, often in the form of islands depending on the level of humidity and organic mass fraction, giving rise to core–shell structures. In several cases the organics separate from the inorganics, especially from the ions. For particles containing water-insoluble linear alkanes, separate hydrophobic and hydrophilic domains are predicted to develop. The surface partitioning of organics is enhanced as the humidity increases. The presence of organics in the interior of the nanoparticle increases as their overall mass fraction in the nanoparticle increases, but this also depends on the humidity conditions. Apart from the organics–inorganics and hydrophobics–hydrophilics separation, our simulations predict a third type of separation (layering) between CPA and MBTCA molecules under certain conditions.
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Sokół-Łętowska, Anna, Alicja Z. Kucharska, Antoni Szumny, Katarzyna Wińska, and Agnieszka Nawirska-Olszańska. "Phenolic Composition Stability and Antioxidant Activity of Sour Cherry Liqueurs." Molecules 23, no. 9 (August 27, 2018): 2156. http://dx.doi.org/10.3390/molecules23092156.
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The aim of the study was to evaluate changes of phenolic and anthocyanin contents, antioxidant activity, aroma compounds and color of sour cherry liqueurs with and without sugar during 6 months of storage at temperatures of 15 °C and 30 °C. Contents of phenolic compounds (HPLC, UPLC-MS) and antiradical activity (ABTS) changes were measured. Color changes were measured by an objective method (ColorQuest XE). During storage fluctuations of phenolic compounds and antioxidant activity content were observed. The content of substances which react with Folin-Ciocalteu reagent was comparable before and after 24 weeks. During the 24 weeks of storage, the highest average antioxidant activity against ABTS radicals was shown by sour cherry liqueurs without sugar, stored at 15 °C. Quicker degradation of anthocyanins was observed in liqueurs without sugar, stored at 30 °C (t1/2—5.9 weeks in liqueurs with sugar and 6.6 weeks in liqueurs without sugar). Better stability of red color was observed in liqueurs with sugar, stored at 15 °C. The content of the dominant aroma compound, benzaldehyde, increased during storage. Long-term storage and sugar addition decreases color attributes but increases organoleptic value without of great influence on antioxidant activity. Studies on a half-year period of liqueur storage showed that their characteristic features are almost unchanged if stored at 15 °C and without sugar added, but organoleptic properties were better in samples stored at 30 °C.
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Latief, Madyawati, Rizky Maharani, Indra Lasmana Tarigan, and Sutrisno Sutrisno. "Coffee Improvement by Wet Fermentation Using Lactobacillus plantarum: Sensory Studies, Proximate Analysis, Antioxidants, and Chemical Compounds." Jurnal Rekayasa Kimia & Lingkungan 18, no. 2 (October 23, 2023): 134–48. http://dx.doi.org/10.23955/rkl.v18i2.32708.
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Fermentation has been developed to produce a distinctive taste in food, one of which is coffee. Fermentation affects the quality and taste of coffee in coffee beans. This study conducted coffee fermentation using Lactobacillus plantarum bacteria, isolates of Lactic Acid Bacteria. The research method begins with the preparation of Lactobacillus plantarum inoculants which will be used for coffee fermentation, fermentation, total phenol and flavonoid content, caffeine content, chlorogenic acid content, compound analysis, antioxidants, and proximate analysis. Total phenol and flavonoid, caffeine, chlorogenic acid, and antioxidant using the UV-VIS Spectrophotometer instrument. In addition, compound analysis is carried out using GC-MS. This study showed that the bacterium Lactobacillus plantarum would hydrolyze sucrose into simpler sugars with the enzyme invertase and produce organic acids through glycolysis. Liberica coffee fermented using Lactobacillus plantarum bacteria contains phenol compounds, flavonoids, antioxidants, and compound compounds higher than Original Liberica coffee. Meanwhile, the caffeine and chlorogenic acid of Liberica coffee fermented using Lactobacillus plantarum bacteria are lower than Original Liberica coffee. Overall, the chemical compounds of Liberica coffee that have been fermented using Lactobacillus plantarum bacteria are better than Original Liberica Coffee. Liberica coffee beans fermented using Lactobacillus plantarum bacteria have better physical quality and taste than Original Liberica coffee
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Ma, Huan-Jin, Li Lin, Ze-Bin Chen, Sheng-Guang Xu, Yu Li, Rui Zhang, and Sheng-Yue Yi. "Biochar preparation and its effects with reduced compound fertilizer on nutrients, phenolic acid and fungal community in tobacco rhizosphere soil." Materials Express 13, no. 11 (November 1, 2023): 1888–98. http://dx.doi.org/10.1166/mex.2023.2574.
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Biochar is a carbon-rich soil conditioner produced from pyrolysis of biomass, it has been widely used to enhance soil quality because of its physical adsorption as well as water and fertilizer conservation functions. This work aimed to improve the soil quality of continuously cropped flue-cured tobacco fields using biochar prepared from agricultural waste. To explore the impact of reduced compound fertilizer with biochar application on nutrients, phenolic acid contents and fungi diversity in the rhizosphere soil, 4 treatments were set: regular compound fertilizer application (T1), and biochar with reduced compound fertilizer in different proportions (T2, T3, T4, with 100, 75, 50% of compound fertilizer, respectively). The physicochemical properties of the prepared biochar were characterized and observed using electron microscopy. The results indicated that, a noticeable increase in the content of soil organic matter (SOM) and soil organic carbon (SOC) in T2 treatment compared to T1 treatment. Moreover, T2 treatment demonstrated a significant improvement in the contents of alkali-hydrolyzable nitrogen (AN), available phosphorus (AP), and available potassium (AK), with increases of 9.29%, 15.85% and 25.42% compared to T1 treatment, respectively. While a gradual decrease in soil AN, AP, and AK content was observed with the reduction of compound fertilizer application (T2–T4), there was no obvious difference between T3 and T1. For total phenolic acid, the content in T2 treatment significantly decreased by 35.99% compared to T1 treatment, while T3 and T4 treatments showed significant reductions of 15.30 and 18.73% respectively, compared to T2 treatment. Biochar application could enhance the fungal community’s abundance and diversity in the rhizosphere soil. Fungal community exhibited the highest richness under T3 treatment, while the relative abundance of Fusarium and Mortierella reduced as the decrease of compound fertilizer (T2–T4). In conclusion, the reduced compound fertilizer with biochar application could reduce nutrient loss, phenolic acids accumulation, and improving the abundance of fungal community in the rhizosphere soil. This paper provides a reference for biochar combined with compound fertilizer to improve soil from the regulation of allelochemicals and soil fungi.
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Takač, Verica, Viola Tóth, Marianna Rakszegi, Péter Mikó, Sanja Mikić, and Milan Mirosavljević. "The Influence of Farming Systems, Genotype and Their Interaction on Bioactive Compound, Protein and Starch Content of Bread and Spelt Wheat." Foods 11, no. 24 (December 13, 2022): 4028. http://dx.doi.org/10.3390/foods11244028.
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An increase in the production and consumption of spelt products can be associated with positive effects on human health, which are attributed to bioactive compounds present in the grain. The basic success of spelt wheat in organic farming might be explained by the fact that spelt wheat belongs to the group of hulled wheat where the presence of a husk protects the seed from abiotic and biotic stress factors, thus demanding less chemical protection. The goal of this study was to investigate the variations in the bioactive compound (alkylresorcinol, arabinoxylan, β-glucan), protein, starch and fructan content of bread and spelt wheat under different farming systems (conventional and organic). The results showed higher protein and alkylresorcinol but lower fructan content in spelt wheat. Organic spelt had significantly higher starch, fiber and alkylresorcinol content but lower β-glucan and protein content than conventionally grown spelt. The spelt variety ‘Oberkulmer-Rotkorn’ was characterized by the highest values for the majority of analyzed traits under both farming systems. Overall, the environmental conditions (Hungary and Serbia), farming systems (conventional and organic) and wheat species (bread and spelt) contributed to the variations of the compositional traits in different manners.
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Yan, Jianfa, Xianmei Zhang, Fanrong Meng, Guodong Chen, Ruodi Wang, Ziyi Ma, Zhenquan He, Guosheng Gai, and Jinhu Zhi. "Evaluation of Cyperus Fertility Improvement in Aeolian Soils from an Application of Humic Acid Combined with Compound Fertilizer." Processes 11, no. 12 (November 22, 2023): 3273. http://dx.doi.org/10.3390/pr11123273.
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Humic acid is a macromolecular organic compound with active groups that, when applied to the soil, can regulate the storage and release of nutrient elements. The effects of a humic acid application at two application rates (F-1: 15 t·hm−2 and F-2: 30 t·hm−2) on soil physicochemical properties and plant growth and yield were compared in field experiments to explore the impact of the humic acid dosage on the soil fertility of aeolian sandy soils. The CEC, EC, pH, organic matter, and available nutrient content were measured in the 0~20 cm and 20~40 cm soil before and after the humic acid application. The results showed that the soil organic matter and available nutrient content increased significantly with an increased humic acid application rate. In the 0~20 cm soil layer, the contents of soil alkaline-hydrolyzable nitrogen, available potassium, and organic matter were the highest in the F-2 treatment, at 24.97, 207.66 mg·kg−1, and 8.99 g·kg−1, respectively, which increased by 76%, 66%, and 54% compared with the control treatment. On the other hand, the content of available phosphorus was the highest in the F-1 treatment, at 13.23 mg·kg−1, which was 38% higher than the control. In the 20~40 cm soil layer, the contents of soil alkaline-hydrolyzable nitrogen, available phosphorus, and available potassium were the highest after the F-2 treatment, at 16.33, 8.51, and 17.14 mg·kg−1, respectively, which increased by 19%, 113%, and 58% compared with the control. The organic matter content was the highest in the F-1 treatment, at 7.61 g·kg−1. After the humic acid application, the CEC and EC increased significantly, and the pH decreased. In addition, the growth status (leaf length, tillering number, and chlorophyll content) and yield of the Cyperus plants significantly increased with an increase in the humic acid dosage. In short, adding humic acid can effectively improve the physical and chemical properties of aeolian soils, regulate the nutrient circulation in the soil, and increase the yield and income from Cyperus cultivation.
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Liu, Zhe, Changbao Xu, George Ac Beattie, Xuying Zhang, and Yijing Cen. "Influence of different fertilizer types on life table parameters of citrus red mite, Panonychus citri (Acari: Tetranychidae) ." Systematic and Applied Acarology 24, no. 11 (November 23, 2019): 2209–18. http://dx.doi.org/10.11158/saa.24.11.11.
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Citrus red mite, Panonychus citri (McGregor) is an important pest of citrus. In order to assess the effect of different fertilizers applying in citrus on this mite, the biological characteristics on the young citrus trees treated with 3 kinds of fertilizer, organic, chemical and compound (mix of organic and chemical fertilizer) were monitored in a thermostatic room. The immature durations were not affected by different fertilizer treatments. However, the survival rates of the immature stages were significantly higher on compound fertilizer and organic fertilizer than on chemical fertilizer. The fecundity of female mites reared on compound fertilizer citrus was also significantly higher than chemical fertilizer. The pre-oviposition period of females reared on compound fertilizer treated citrus was significantly shorter, and the longevity of males was significantly longer than organic fertilizer. Overall, the mites reared on compound fertilizer treated citrus had the highest net reproduction rate (Ro), index of population trend (I), intrinsic rate of increase (rm), finite rates of increase () and shortest mean generation time (T) comparing with other treatments. The results of nutrient composition determination of citrus leaves treated with three fertilizer treatments showed that the leaves of compound fertilizers contained the highest N, P content and N/K. As P has no positive or direct influence on most phytophagous insects and Acaridae mites in previous studies, the compound fertilizer is beneficial to the optimum population growth of citrus red mite may be closely related to the two indexes, N content and N/K.
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Zhao, Xin, Edward Carey, James Nechols, Kim Williams, and Weiqun Wang. "(473) Influences of Fertilizer Source and Insecticide Application on Phenolic Compounds in Pac Choi (Brassica rapa L.)." HortScience 40, no. 4 (July 2005): 1092C—1092. http://dx.doi.org/10.21273/hortsci.40.4.1092c.
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Implications of dietary phenolic compounds for human health and disease prevention have been indicated by a body of literature. A greenhouse pot study was performed to investigate the impacts of fertilizer source and preventive insecticide application on phenolic compound levels in pac choi [Brassica rapa (L.) cv. Mei Qing]. A two-way randomized complete-block design with five replications was used in this experiment. Fertilizer source consisted of two levels: conventional fertilizer (pre-plant application of Osmocote slow-release fertilizer), and organic fertilizer (pre-plant application of vermicompost and fertigation with compost tea and fish emulsion). Insecticide application consisted of three levels: organic (pyrethrin) vs. conventional (permethrin), and a plain water control. At harvest, total phenolics and individual phenolic compounds in pac choi leaves (blades) were analyzed by Folin assay and HPLC, respectively. Head weight of pac choi was significantly higher under conventional fertilizer treatment, while it was not affected by insecticides. Total phenolic content of pac choi was significantly increased by organic fertilizer treatment. HPLC results indicated that organic fertilizer treatment resulted in significantly higher levels of individual phenolic compounds, including chlorogenic acid and ferulic acid. In contrast, preventive insecticide application showed little effect on the phenolics in pac choi. Correlation analysis excluded the influence of plant size (head weight) on phenolic content in pac choi. Differential N-forms, rates of nutrient release, and/or variable nutrient content in organic and conventional fertilizer treatments may contribute to elevated phenolic content in organically fertilized pac choi.
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Lee, Kang, and Wan Whang. "Inhibitory Effects of Bioassay-Guided Isolation of Anti-Glycation Components from Taraxacum coreanum and Simultaneous Quantification." Molecules 23, no. 9 (August 27, 2018): 2148. http://dx.doi.org/10.3390/molecules23092148.
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Inhibition of the formation of advanced glycation end products (AGEs) is an attractive strategy in diabetes treatment. Taraxacum coreanum extracts were suggested to have antidiabetic effects. However, studies on the components of T. coreanum are lacking, and there is no report on the inhibitory effects of T. coreanum on the formation of AGEs. Therefore, T. coreanum extracts and fractions were tested for their inhibitory effects on α-glucosidase and AGEs formation in two systems (bovine serum albumin (BSA)–glucose and BSA–methylglyoxal (MGO)). Bioassay-guided isolation of compounds from T. coreanum led to six flavones (1–6) and four hydroxycinnamic acid derivatives (7–11). Compound 11 exhibited the highest inhibitory activity against α-glucosidase and AGEs formation and had the highest content in T. coreanum extract. All compounds except compound 9 showed a stronger inhibition than the positive control in the BSA-glucose and BSA-MGO system. In addition, T. coreanum showed a higher content of bioactive compounds and stronger inhibition of AGE formation and α-glucosidase activity than T. officinale. Our study demonstrated the preventive and therapeutic efficacy of T. coreanum and its potential use as a cost-effective phytopharmaceutical in complementary therapy against type-2 diabetes and its complications.
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Alcântara, Laura M., Thalita C. S. Ferreira, Vanessa Fontana, Eric Chatelain, Carolina B. Moraes, and Lucio H. Freitas-Junior. "A Multi-Species Phenotypic Screening Assay for Leishmaniasis Drug Discovery Shows That Active Compounds Display a High Degree of Species-Specificity." Molecules 25, no. 11 (May 30, 2020): 2551. http://dx.doi.org/10.3390/molecules25112551.
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High genetic and phenotypic variability between Leishmania species and strains within species make the development of broad-spectrum antileishmanial drugs challenging. Thus, screening panels consisting of several diverse Leishmania species can be useful in enabling compound prioritization based on their spectrum of activity. In this study, a robust and reproducible high content assay was developed, and 1280 small molecules were simultaneously screened against clinically relevant cutaneous and visceral species: L. amazonensis, L. braziliensis, and L. donovani. The assay is based on THP-1 macrophages infected with stationary phase promastigotes and posterior evaluation of both compound antileishmanial activity and host cell toxicity. The profile of compound activity was species-specific, and out of 51 active compounds, only 14 presented broad-spectrum activity against the three species, with activities ranging from 52% to 100%. Notably, the compounds CB1954, Clomipramine, Maprotiline, Protriptyline, and ML-9 presented pan-leishmanial activity, with efficacy greater than 70%. The results highlight the reduced number of compound classes with pan-leishmanial activity that might be available from diversity libraries, emphasizing the need to screen active compounds against a panel of species and strains. The assay reported here can be adapted to virtually any Leishmania species without the need for genetic modification of parasites, providing the basis for the discovery of broad spectrum anti-leishmanial agents.
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Naksing, Thanyarat, Jantima Teeka, Wutti Rattanavichai, Prapaporn Pongthai, Dolnapa Kaewpa, and Atsadawut Areesirisuk. "Determination of bioactive compounds, antimicrobial activity, and the phytochemistry of the organic banana peel in Thailand." Bioscience Journal 37 (May 12, 2021): e37024. http://dx.doi.org/10.14393/bj-v37n0a2021-56306.
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Banana fruit is enriched with phytonutrients, minerals, and its peel, which is mostly discarded as waste. This research aimed to study its bioactive compound properties, antimicrobial activity, and identify and characterize the constituents of organic banana peel extract (BPE), composed of six species (i.e., Kluai Homthong, Kluai Namwa, Kluai Kai, Kluai Hukmook, Kluai Lebmuernang, and Kluai Homtaiwan). Total phenolic content (TPC), antioxidant content, and ferric-reducing antioxidant power (FRAP) were important in BPE of Kluai Kai. BPE of Kluai Hukmook could inhibit Aeromonas hydrophila and Staphylococcus aureus. The Fourier-transform infrared spectroscopy (FTIR) spectrum exposed diverse compounds of primary and secondary phytochemicals. Four main constituents, including acetic acid, formic acid, 1,2-benzenediol,3-methyl-, and 4-hydroxy-2-methylacetophone derived from gas chromatography-mass spectroscopy (GC-MS), demonstrated their antioxidant properties and antimicrobial activity. This result suggests that organic banana peel can both be applied as an antioxidant and antimicrobial substance. BPE increases the value of banana peels (BPs) and reduces the burden of its waste disposal in the environment.
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Schall, Christian, Klaus Gustav Heumann, Stephen De Mora, and Peter A. Lee. "Biogenic brominated and iodinated organic compounds in ponds on the McMurdo Ice Shelf, Antarctica." Antarctic Science 8, no. 1 (March 1996): 45–48. http://dx.doi.org/10.1017/s0954102096000089.
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During January 1994 seven meltwater ponds on the McMurdo Ice Shelf were investigated for their content of biogenic iodinated and brominated volatile hydrocarbons. An efficient purge and trap system in combination with a powerful gas chromatographic separation and an electron capture detector achieved detection limits of 0.02–0.4 ng 1−1, depending on the different substances. The following compounds could be identified and quantified: CH3I, CH2I2, CH2C1I, CHBr3, CH2Br2, BrCH2CH2Br, CHBr2Cl, and CHBrCl2. This is the first time that 1,2–dibromoethane has been detected as a biogenic substance in the environment. In contrast to many other aquatic systems, where CH3I is found to be the most volatile iodine compound, CH2I2 showed the highest concentration in all ponds falling in the range of 5–20 ng 1−1. In three of seven ponds investigated, CH2CII was the second abundant iodinated substance. CHBr3 usually exhibited concentrations in the range of 2.5–8.6 ng 1−1. BrCH2CH2Br, previously not observed as a biogenic compound, was found to have concentrations similar to those of bromoform and even exceeded the bromoform content in two ponds and the CH2Br2 content in all ponds. Whether cyanobacteria, the dominant organisms in the ponds, are responsible for this distribution pattern must be clarified by further investigations.
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Polumackanycz, Milena, Spyridon Alexandros Petropoulos, Mikel Añibarro-Ortega, José Pinela, Lillian Barros, Alina Plenis, and Agnieszka Viapiana. "Chemical Composition and Antioxidant Properties of Common and Lemon Verbena." Antioxidants 11, no. 11 (November 15, 2022): 2247. http://dx.doi.org/10.3390/antiox11112247.
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The nutritional profiles of common and lemon verbena leaves were analyzed (proximate constituents, free sugars, organic acids, tocopherols, and fatty acids) and the leaves were prepared in hydromethanolic and aqueous (decoctions and infusions) extracts. The phenolic compound composition and antioxidant activity (2,2-Diphenyl-1-picrylhydrazyl (DPPH); 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS), ferric-reducing antioxidant power (FRAP); and cupric-reducing antioxidant capacity (CUPRAC) assays) of the extracts were characterized. The nutritional composition varied between the studied species, with lemon verbena showing higher amounts of protein, ash, and fat than common verbena, whereas the opposite trend was recorded for the dietary fiber content. The main free sugars detected in both species were fructose, glucose, and sucrose, which were present in higher amounts in the common verbena samples. Succinic acid was the most abundant organic acid in both species while high amounts of oxalic acid were detected in lemon verbena. The main fatty acids in both species were α-linolenic, palmitic, and linoleic acid. Regarding the phenolic compound content, the extracts of lemon verbena presented higher amounts of total phenolic compounds (TPCs), total flavonoids (TFs) and total phenolic acids (TPAs) than the common verbena extracts while the aqueous extracts (infusions and decoctions) were richer in TPCs, TFs, and TPAs than the hydromethanolic ones in both species. Nine phenolic compounds were identified and quantified, including seven phenolic acids and two flavonoids. The lemon verbena samples were characterized by higher antioxidant activity compared to the common verbena samples while the aqueous extracts showed higher antioxidant efficacy than the hydromethanolic ones. In conclusion, both species showed promising results in terms of the nutritional value, chemical composition, and antioxidant activities, which were positively correlated with the phenolic compound contents. Moreover, the extraction protocol may affect the chemical composition and bioactive properties of both species, with aqueous extracts showing better results than hydromethanolic ones.