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Artículos de revistas sobre el tema "Residues"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 25 de julio de 2025

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1

KUMAR, KULDIP, K. M. GOH, W. R. SCOTT, and C. M. FRAMPTON. "Effects of 15N-labelled crop residues and management practices on subsequent winter wheat yields, nitrogen benefits and recovery under field conditions." Journal of Agricultural Science 136, no. 1 (2001): 35–53. http://dx.doi.org/10.1017/s0021859600008522.

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Nitrogen-15 enriched ammonium sulphate was applied to micro-plots in a field in which two leguminous (white clover and peas) and two non-leguminous (ryegrass and winter wheat) crops were grown to produce 15N-labelled crop residues and roots during 1993/94. Nitrogen benefits and recovery of crop residue-N, root-N and residual fertilizer-N by three succeeding winter wheat crops were studied. Each crop residue was subjected to four different residue management treatments (ploughed, rotary hoed, mulched or burned) before the first sequential wheat crop (1994/95) was sown, followed by the second (1

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2

Kulkarni, Prachi, Megan Shoff, and Anne Lucas. "Comparison of Test Methods To Screen For Residual Chemical Contamination On Medical Device Surfaces." Biomedical Instrumentation & Technology 46, no. 5 (2012): 388–94. http://dx.doi.org/10.2345/0899-8205-46.5.388.

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Abstract Reprocessing medical devices involves several steps including cleaning and disinfection or sterilization. Chemical residuals can occur at various stages of reprocessing. These residues could interfere with device function and potentially harm patients. These solutions are composed of a combination of various chemicals and their residues are highly diluted post rinsing, therefore, it is difficult to find a sensitive and rapid method to detect toxicity due to chemical residues. This study focused on (1) finding the levels of residues that are cytotoxic using two mammalian cell lines and

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3

Sukitprapanon, Tanabhat-Sakorn, Metawee Jantamenchai, Duangsamorn Tulaphitak, Nattaporn Prakongkep, Robert John Gilkes, and Patma Vityakon. "Influence of Application of Organic Residues of Different Biochemical Quality on Phosphorus Fractions in a Tropical Sandy Soil." Agronomy 11, no. 2 (2021): 248. http://dx.doi.org/10.3390/agronomy11020248.

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Understanding phosphorus (P) dynamics in tropical sandy soil treated with organic residues of contrasting quality is crucial for P management using organic amendments. This research determined P fractions in a tropical sandy soil under the application of organic residues of different quality, including groundnut stover (GN), tamarind leaf litter (TM), dipterocarp leaf litter (DP), and rice straw (RS). The organic residues were applied at the rate of 10 t DM ha−1 year−1. The P fractions were examined by a sequential extraction procedure. Organic residue application, regardless of residue qualit

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Drabikowska, A. K., and G. Woźniak. "Modification of uridine phosphorylase from Escherichia coli by diethyl pyrocarbonate. Evidence for a histidine residue in the active site of the enzyme." Biochemical Journal 270, no. 2 (1990): 319–23. http://dx.doi.org/10.1042/bj2700319.

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Uridine phosphorylase from Escherichia coli is inactivated by diethyl pyrocarbonate at pH 7.1 and 10 degrees C with a second-order rate constant of 840 M-1.min-1. The rate of inactivation increases with pH, suggesting participation of an amino acid residue with pK 6.6. Hydroxylamine added to the inactivated enzyme restores the activity. Three histidine residues per enzyme subunit are modified by diethyl pyrocarbonate. Kinetic and statistical analyses of the residual enzymic activity, as well as the number of modified histidine residues, indicate that, among the three modifiable residues, only

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5

Takim, Kasim, and Mehmet Emin Aydemir. "GC-MS and LC-MS Pesticide Analysis of Black Teas Originating from Sri Lanka, Iran, Turkey, and India." Toxics 11, no. 1 (2022): 34. http://dx.doi.org/10.3390/toxics11010034.

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The purpose of this study is to investigate pesticide residues in the imported and domestic tea sold in Turkey and to detect their compliance with maximum residue limits (MRL) and Acceptable Daily Intake (ADI). A total of 79 samples were analyzed by using LC-MS/MS and GC-MS devices with AOAC 2007.01 method to investigate 603 pesticide residues. According to the results, pesticide residues were found in a total of 28 tea samples. Pesticide residues were found in the countries of origin at the rates as follows: Iran (100%), India (33.3%) and Sri Lanka (17.3%). No pesticide residue was detected i

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6

Indraningsih, Indraningsih, and Yulvian Sani. "Pesticide residues in brain tissues of dairy cattle in Lembang." Jurnal Ilmu Ternak dan Veteriner 11, no. 1 (2012): 76–83. https://doi.org/10.14334/jitv.v11i1.510.

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The use of pesticides to control plant diseases may cause residual formation in crops, its byproduct and environmental. Furthermore, the use of agriculture byproduct as animal feed may cause poisoning or residual formation in animal products. The purpose of this study is to investigate of pesticide residues in brain tissues of dairy cattle in relation to animal feed as a contamination source. Samples consisted of animal feeds (19 samples of fodder and 6 samples of feed), 31 samples of sera and 25 samples of brain tissues of dairy cattle collected from Lembang, West Java. Feeds and fodders were

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7

Malgwi, K. D., B. Umaru, S. A. Chabri, et al. "Assessment of Oxytetracycline and Penicillin G Residues Levels in Raw and Fermented Milk in Maiduguri, Northeastern Nigeria." Saudi Journal of Medical and Pharmaceutical Sciences 9, no. 03 (2023): 140–49. http://dx.doi.org/10.36348/sjmps.2023.v09i03.001.

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This study was conducted to evaluate the presence and concentration of Oxytetracycline and Penicillin G residues in raw cow and Fermented milk consumed in Maiduguri, Northeastern Nigeria. A total of 172 (86 raw and 86 fermented) milk samples were randomly collected from different milk selling points in Maiduguri. A Spectrophotometer ultraviolet visible spectrum machine was used to detect and quantify the oxytetracycline and penicillin G residues in the milk samples. All samples (raw and fermented milk) tested positive for oxytetracycline and penicillin G residues with a mean residual concentra

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8

Ahmed, Md Sultan, Md Arifur Rahman, Afroza Begum, Alamgir Zaman Chowdhury, and Md Shahed Reza. "Multi insecticide residue analysis in vegetables collected from different regions of Bangladesh." Asian-Australasian Journal of Bioscience and Biotechnology 1, no. 3 (2016): 547–51. http://dx.doi.org/10.3329/aajbb.v1i3.64036.

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An investigative study was conducted to determine the left over residue of five commonly used insecticides in cauliflower and yard long bean samples collected from local market of eight different regions like Bogra, Comilla, Dhaka, Gazipur, Jessore, Khagrachari, Rajshahi and Rangpur and carried out to the lab for analysis. Among 47 analyzed vegetable samples, 20 had insecticide residues, of them 11 had above maximum residue limit (MRL) set by FAO/WHO. Of 24 analyzed cauliflower samples, 11 contained residue of cypermethrin, diazinon, quinalphos, fenitrothion and malathion in which 8 had above

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9

Bixler, G. S., M. Bean, and M. Z. Atassi. "Site recognition by protein-primed T cells shows a non-specific peptide size requirement beyond the essential residues of the site Demonstration by defining an immunodominant T site in myoglobin." Biochemical Journal 240, no. 1 (1986): 139–46. http://dx.doi.org/10.1042/bj2400139.

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In previous studies, six T sites within myoglobin (Mb) were localized. To define precisely the boundaries of the T sites, a new approach is introduced and applied here to the T site residing within residues 107-120 of Mb. Two sets of peptides were synthesized. One set represents a stepwise elongation by one-residue increments of the Mb sequence. The other set represents an identical stepwise addition of one-residue increments of the Mb sequence, but which were extended by additional unrelated (nonsense) residues to a uniform size of 14 residues. The longer peptides (nonsense-extended) usually

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10

Nining, Euis, Rizal Sjarief Sjaiful Nazli, Zainal Alim Mas’ud, Machfud Machfud, and Sobir Sobir. "Profil Residu Insektisida Organofosfat di Kawasan Produksi Bawang Merah (Allium Ascalonicum L.) Kabupaten Brebes Jawa Tengah." Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) 9, no. 4 (2019): 999–1009. http://dx.doi.org/10.29244/jpsl.9.4.999-1009.

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Excessive use of pesticides can have an impact on the environment, including the loss of pesticide residues in soil and agricultural products. The purpose of this study was to determine the spreading of organophosphate pesticide residues in the shallot production area of Brebes Regency, Central Java. Research locations were two districts selected by purposive sampling based on production area, namely Kersana and Wanasari Districts. Organophosphate compounds analyzed include chlorpyrifos, paration, profenofos, diazinon, fenitrotion, metidation and malation. Organophosphate residue analysis was

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11

Kellogg, Glen E. "Three-Dimensional Interaction Homology: Deconstructing Residue–Residue and Residue–Lipid Interactions in Membrane Proteins." Molecules 29, no. 12 (2024): 2838. http://dx.doi.org/10.3390/molecules29122838.

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A method is described to deconstruct the network of hydropathic interactions within and between a protein’s sidechain and its environment into residue-based three-dimensional maps. These maps encode favorable and unfavorable hydrophobic and polar interactions, in terms of spatial positions for optimal interactions, relative interaction strength, as well as character. In addition, these maps are backbone angle-dependent. After map calculation and clustering, a finite number of unique residue sidechain interaction maps exist for each backbone conformation, with the number related to the residue’

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Šuk, Jaroslav, Kateřina Hamouzová, Jana Hajšlová, and Miroslav Jursík. "Dynamics of herbicides degradation in carrot (Daucus carota L.) roots and leaves." Plant, Soil and Environment 67, No. 6 (2021): 353–59. http://dx.doi.org/10.17221/46/2021-pse.

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This research had two main aims. First, to analyse the degradation dynamics of herbicides commonly used in carrot (aclonifen, clomazone, flufenacet, linuron, metribuzin, pendimethalin, S-metolachlor). Second, to compare the amount of herbicide residues with the maximum residue level and with requirements of non-residual production. The field experiments were conducted in 2012–2016. All tested herbicides resulted in relatively low concentrations of residues in carrot roots (up to 10 µg/kg) when the recommended withdrawal period was followed between application and harvest. The concentration of

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Malladi, Haritha, Meron Asnake, Andrew LaCroix, and Cassie Castorena. "Low-Temperature Vacuum Drying Procedure for Rapid Asphalt Emulsion Residue Recovery." Transportation Research Record: Journal of the Transportation Research Board 2672, no. 28 (2018): 256–65. http://dx.doi.org/10.1177/0361198118791913.

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Asphalt emulsions are used extensively in tack coats and preservation surface treatments. The current specifications for asphalt emulsion residue recovery in AASHTO PP 72 are based on low-temperature evaporative drying. The shortest residue recovery procedure included in AASHTO PP 72 requires 6 h of conditioning in an oven to dry an emulsion. The ability to recover emulsion residues efficiently is of great interest given the ongoing efforts to develop emulsion performance-graded specifications based on residual binder properties. In this study, a rapid, vacuum drying technology was evaluated f

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14

Dike-Iheanyi, Evelyn Ifeyinwa, J. C. Ifemeje, Chinenye Justy, Okoye, F. C. Okoroigwe, and V. C. Ezeanyanwu. "Determination of Residual Pesticides in Selected Grains, Fruits and Vegetables Commercially Sold in Eke Awka Market, Awka, Anambra State, Nigeria." IDOSR JOURNAL OF BIOCHEMISTRY, BIOTECHNOLOGY AND ALLIED FIELDS 9, no. 3 (2024): 1–6. http://dx.doi.org/10.59298/idosr/jbbaf/24/93.16000.

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Six samples from cucumber (Cucumis sativus), apple (Malus domestica), cabbage (Brassica oleracea), Tiger nuts (Cyperus esculentus), Beans (Phaseolus vulgaris), Green peas (Pisum sativum) were purchased from Eke Awka market, Awka in Anambra state, and were evaluated for their residual pesticides. Estimation of Pesticides residues were carried out using American Public Health Association Method. The result of the pesticide residues analysis showed that all the samples contain pesticide residues but the most prevalent one was Isopropylamine. The pesticide residues in beans have highest concentrat

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15

She, Xiaoyun, Yu Gao, and Yan Shi. "Determination of glufosinate-ammonium residue in wheat and soil by ultra-performance liquid chromatography-tandem mass spectrometry." Quality Assurance and Safety of Crops & Foods 15, no. 2 (2023): 244–51. http://dx.doi.org/10.15586/qas.v15i2.1163.

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The worldwide use of glufosinate-ammonium has dramatically increased, but concern over its impact on plants and soil is also increasing. With the aim of clarifying whether the application of glufosinate-ammonium will generate residue in wheat (Triticum aestivum L.) and soil, ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) was used to detect wheat plants, grains, and soil. Under experimental conditions, no residue of glufosinate-ammonium was detected in wheat plants and grains during each growth period. The residual level of glufosinate decreased gradually with the

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16

Memon, Tarique Ahmed. "Assessment of Rice Residues as Potential Energy Source in Pakistan." Sukkur IBA Journal of Emerging Technologies 5, no. 1 (2022): 41–53. http://dx.doi.org/10.30537/sjet.v5i1.982.

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Pakistan produces enormous quantity of biomass wastes for example rice straw (RS) and rice husk (RH), wheat straw, and other biomass wastes that are being burned in the field after crop harvest to prepare the land for next crop. Biomass is known as potential energy source which can be effectively utilized as an alternative to fossil fuels. This study aims to assess the energy potential and gaseous pollutant emissions from rice residues such as RS and RH. The Energy potential of crop residues in Pakistan was obtained by considering the residual characteristics like residue to crop product ratio

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17

Zhang, Qiu Rong, Shuang Quan Zhang, and Ting Ting Pan. "Fraction Distribution Changes of Heavy Metals in Co-Pyrolysis of Sewage Sludge and Corn Straw." Advanced Materials Research 236-238 (May 2011): 187–91. http://dx.doi.org/10.4028/www.scientific.net/amr.236-238.187.

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Maiz’s short sequential extraction procedure was used to extract the heavy metals in the carbon residues made from sewage sludge by co-pyrolysis with corn straw. The content of heavy metals in the residues was determined by ICP-MS to study the fraction distribution changes of heavy metals. It is concluded that the content of mobile and mobilization heavy metals exsisted in the residue decrease and the content of residual heavy metals increase due to the co-pyrolysis. The co-pyrolysis temperature has great effect on the fraction distribution changes of heavy metals. The content of residual frac

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18

Suhartana, Sona, Yuniawati, Seca Gandaseca, Dulsalam, Soenarno, and Jegatheswaran Ratnasingam. "Potential of Wood Harvesting Residues and Residual Stand Damage due to Timber Harvesting: A Case Study at PT Austral Byna in Central Kalimantan, Indonesia." International Journal of Forestry Research 2022 (January 12, 2022): 1–8. http://dx.doi.org/10.1155/2022/3251945.

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The practice of timber harvesting in natural forests which has been conducted up to now still leaves wood harvesting residue and residual stand damage. Most condition of wood harvesting residue is still good and can be utilized. The objective of this research was to determine the potency of wood harvesting residue and residual stand damage on timber harvesting in natural forests. The data on wood utilization, wood harvesting residue, and residual damage were collected from three sample plots. The sample plots were arranged in a systematic and purposive manner, and the data were processed with

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19

Song, Qiaoling, Zhenan Wu, Chenghao Jin, Zhichao Yu, Peng Xu, and Zhouting Jiang. "Effects of Residual Composition and Distribution on the Structural Characteristics of the Protein." International Journal of Molecular Sciences 23, no. 22 (2022): 14263. http://dx.doi.org/10.3390/ijms232214263.

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The effect of ratio and consecutive number of hydrophobic residues in the repeating unit of protein chains was investigated by MD simulation. The modified off-lattice HNP model was applied in this study. The protein chains constituted by different HNP ratios or different numbers of consecutively hydrophobic residues with the same chain length were simulated under a broad temperature range. We concluded that the proteins with higher ratio or larger number of sequentially hydrophobic residues present more orientated and compact structure under a certain low temperature. It is attributed to the l

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20

Kim, Chang Jo, Won Tae Jeong, Kee Sung Kyung, et al. "Dissipation and Distribution of Picarbutrazox Residue Following Spraying with an Unmanned Aerial Vehicle on Chinese Cabbage (Brassica campestris var. pekinensis)." Molecules 26, no. 18 (2021): 5671. http://dx.doi.org/10.3390/molecules26185671.

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We assessed the residual distribution and temporal trend of picarbutrazox sprayed by agricultural multicopters on Chinese cabbage and considered fortification levels and flying speeds. In plot 2, 14 days after the last spraying, the residues decreased by ~91.3% compared with those in the samples on day 0. The residues in the crops decreased by ~40.8% of the initial concentration owing to growth (dilution effect) and by ~50.6% after excluding the dilution effect. As the flight speed increased, picarbutrazox residues decreased (p < 0.05, least significant deviation [LSD]). At 2 m s−1 flight s

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21

Griffin, James L., and John F. Robinson. "Metolachlor and Alachlor Persistence in Rice (Oryza sativa) Following Soybean (Glycine max)." Weed Technology 3, no. 1 (1989): 82–85. http://dx.doi.org/10.1017/s0890037x00031365.

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Field studies were conducted for 3 yr to evaluate the persistence of metolachlor and alachlor applied to ‘Centennial’ soybean and to determine their residual effect on ‘Mars' rice. At labeled use rates of metolachlor at 2.8 kg ai/ha and alachlor at 3.9 kg ai/ha, soil residue levels in the fall 5 months after application on Crowley and Midland silt loam soils averaged 0.04 and 0.05 ppmw, respectively. Metolachlor fall soil residues averaged 3.5 times higher when applied at 5.6 and 11.2 kg/ha compared to 2.8 kg/ha, but residues for labeled and double rates of alachlor were similar. In the spring

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22

Dari, Linda, Ahmad ADDO, and Komla Agbeko DZISI. "Determination of Pesticide Residuals in Soil and Tomato Fruits from Two Tomato Production Areas in northern Ghana." Ghana Journal of Science, Technology and Development 6, no. 2 (2020): 37–44. http://dx.doi.org/10.47881/167.967x.

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Tomato fruit (Lycopersicon esculentum Mill) is an important vegetable commodity in Ghana, as it is consumed daily in many households either heat-treated or without any form of heat treatments. Tomato production is a major source of income for many smallholder producers in Northern Ghana especially through dry season farming when the major supply of tomatoes from Southern Ghana is exhausted. Research conducted for the past decade confirmed the presence of pesticide residues in fruits and vegetables such as cabbage, onion, cucumber, lettuce, tomatoes, okra and pepper. The objective of this study

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23

Tian, Chunlan, Ju Zhou, Chunxiao Ren, Mamdouh Omran, Fan Zhang, and Ju Tang. "Drying Kinetics of Microwave-Assisted Drying of Leaching Residues from Hydrometallurgy of Zinc." Materials 16, no. 16 (2023): 5546. http://dx.doi.org/10.3390/ma16165546.

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In the hydrometallurgical process of zinc production, the residue from the leaching stage is an important intermediate product and is treated in a Waelz kiln to recover valuable metals. To ensure optimal results during the Waelz kiln process, it is necessary to pre-treat the residues by drying them first due to their higher water content. This work studies the residue’s drying process using microwave technology. The study results indicate that microwave technology better removes the residue’s oxygen functional groups and moisture. The dehydration process’s effective diffusion coefficient incre

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Sagara, H. M., S. A. Schliebe, and M. C. Kong. "Pyrotechnic Residues in Gunshot Residue Analysis." Proceedings, annual meeting, Electron Microscopy Society of America 43 (August 1985): 128–29. http://dx.doi.org/10.1017/s0424820100117649.

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Particle analysis by scanning electron microscopy with energy-dispersive x- ray analysis is one of the current methods used in crime laboratories to aid law enforcement in identifying individuals who have recently fired or handled a firearm. During the discharge of a firearm, the high pressure caused by the detonation of the cartridge materials forces a portion of the generated gases through leaks in the firing mechanism of the weapon. These gases contain residues of smokeless powder, primer mixture, and contributions from the projectile itself. The condensation of these hot gases form discret

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Ulomi, Winstone J., Fauster X. Mgaya, Zuhura Kimera, and Mecky I. Matee. "Determination of Sulphonamides and Tetracycline Residues in Liver Tissues of Broiler Chicken Sold in Kinondoni and Ilala Municipalities, Dar es Salaam, Tanzania." Antibiotics 11, no. 9 (2022): 1222. http://dx.doi.org/10.3390/antibiotics11091222.

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In Tanzania, the increased demand for animal-derived foods, particularly eggs, meat, and milk, has resulted in the intensification of farming systems with the use of antimicrobials, particularly sulphonamides and tetracyclines. According to the FAO/WHO Codex Alimentarius commission, concentrations of antimicrobial residues in food exceeding the acceptable daily intake (ADI) and maximum residual limit (MRL) pose a health risk to consumers. This cross-sectional study determined the concentrations of sulphonamide and tetracycline residues in the liver tissues of commercial broiler chicken sold in

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Malico, Isabel, and Ana Cristina Gonçalves. "Eucalyptus globulus Coppices in Portugal: Influence of Site and Percentage of Residues Collected for Energy." Sustainability 13, no. 11 (2021): 5775. http://dx.doi.org/10.3390/su13115775.

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Studies that quantify forest bioenergy potentials hardly address the questions of site quality, proportion and type of residues removed from the stands, and environmental impacts of those removals. However, those factors are important for energy-potential results and forest sustainability. This study compares, in terms of residual biomass availability for energy production and of sustainability, different locations, site indices, and forest management strategies in Eucalyptus globulus stands for pulp and paper in northern and central Portugal. A growth and production simulator was used to calc

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Das, Anuj Kumer, and G. M. M. Anwarul Hasan. "Analysis of Pesticide Residual Levels In Maize (Zea mays L.) Grain, Flour and Processed Items in Selected Areas of Dhaka, Bangladesh." Oriental Journal Of Chemistry 38, no. 3 (2022): 681–87. http://dx.doi.org/10.13005/ojc/380319.

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In this study, the residual levels of Organophosphorus pesticides (OPPs) and organochlorine pesticides (OCPs) in maize grain, maize flour and processed items were determined. A total of 90 samples were collected and analyzed by Gas chromatography Tandem Mass spectrometry (GC-MS/MS). Several OPPs residues including Dichlorvos (964.38 ± 143.21 μg/kg), Methyl Parathion (43.98 ± 12.90 μg/kg) and Dursban (Chlorpyrifos) (39.82 ± 10.75 μg/kg) were detected in maize grain samples while Dichlorvos (128.65 ± 22.78 μg/kg) and Dursban (Chlorpyrifos) (12.54 ± 7.66 μg/kg) were detected in maize flour sample

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Fitriadi, Bayu Refindra, та Ayutia Ciptaningtyas Putri. "Dampak Aplikasi Pestisida Sipermetrin, Deltametrin, Klorpirifos dan λ-Sihalotrin Terhadap Kandungan Residu Pestisida pada Biji Kakao". Jurnal AGROSAINS dan TEKNOLOGI 4, № 1 (2019): 10. http://dx.doi.org/10.24853/jat.4.1.10-18.

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The use of various types of active ingredients with high intensity pesticides in dealing with pest disturbances often makes farmers pay less attention to the negative impacts. Deltamethrin, sipermetrin, λ-cyhalothrin and chlorpyrifos are active ingredients of pesticides that are often used by cocoa farmers to control pests Helopeltis sp. spp. which is one of the main pests in cocoa plants. Field tests on pesticide application were carried out on cocoa plants with Helopeltis sp. spp. High. This test was carried out on 4 treatment blocks applied with different active ingredients. Pesticide resid

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Pichayakorn, Buasuwan, Pusuwan Ratchaneevipa, Runhiwa Nuttida, and Prasertphon Suphatchaya. "Prevalence of Pesticide residues in Fresh Chili sold in Fresh Markets in Nonthaburi Province, Thailand." International Journal of Life Sciences Research 10, no. 3 (2022): 56–60. https://doi.org/10.5281/zenodo.7053562.

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<strong>Abstract:</strong>  Background: Pesticide residues were found in many samples of vegetables sold in fresh markets for consumers. Chili pepper is one of the most popular food ingredients. Objective: Find the percentage of vegetables from the produced market and organic vegetables from the department store that were detected Organophosphate and Carbamate pesticide residue above MRL (maximum residue limit for pesticide). Method:  In this research, the samples were tested for pesticide residues with MJPK pesticide test kit that applies colorimetric cholinesterase inhibitor assay.

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Galt, Ryan E. ""It just goes to kill Ticos": national market regulation and the political ecology of farmers' pesticide use in Costa Rica." Journal of Political Ecology 16, no. 1 (2009): 1. http://dx.doi.org/10.2458/v16i1.21689.

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This paper addresses pesticide residues on vegetables in developing countries through the specific case of Costa Rica. Pesticide residues are often very high on vegetables in developing countries, generally considerably higher than in industrialized countries. Using a political ecology approach, I combine qualitative and quantitative primary data with secondary data to answer two questions. Why do farmers use pesticides in a manner that results in high levels of residues on vegetables? And, how do markets with unequal regulatory strength affect farmers' pesticides use, and, by inference, the r

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Ferdous, Most Rifat Ara, Md Raju Ahmed, Sayekul Hasan Khan, et al. "Effect of discriminate and indiscriminate use of oxytetracycline on residual status in broiler soft tissues." January-2020 13, no. 1 (2020): 61–67. http://dx.doi.org/10.14202/vetworld.2020.61-67.

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Aim: This study aimed to evaluate the effects of discriminate and indiscriminate use of oxytetracycline on hematological parameters, residual status in soft tissue of broiler and of thermal effect on oxytetracycline residual status. Materials and Methods: Eighteen, day-old male broiler chickens were purchased and were divided into three different groups (control group, discriminate group, and indiscriminate group). The control group received no antibiotics. The discriminate group received oxytetracycline 1 g/L drinking water for 5 consecutive days, and 10 days' withdrawal period was maintained

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El-Sheikh, El-Sayed A., Mahmoud M. Ramadan, Ahmed E. El-Sobki, et al. "Pesticide Residues in Vegetables and Fruits from Farmer Markets and Associated Dietary Risks." Molecules 27, no. 22 (2022): 8072. http://dx.doi.org/10.3390/molecules27228072.

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The use of pesticides leads to an increase in agricultural production but also causes harmful effects on human health when excessively used. For safe consumption, pesticide residues should be below the maximum residual limits (MRLs). In this study, the residual levels of pesticides in vegetables and fruits collected from farmers’ markets in Sharkia Governorate, Egypt were investigated using LC-MS/MS and GC-MS/MS. A total number of 40 pesticides were detected in the tested vegetable and fruit samples. Insecticides were the highest group in detection frequency with 85% and 69% appearance in vege

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Atassi, M. Z., M. Yoshioka, M. Bean, and G. S. Bixler. "Non-specific peptide size effects in the recognition by site-specific T-cell clones. Demonstration with a T site of myoglobin." Biochemical Journal 246, no. 2 (1987): 307–12. http://dx.doi.org/10.1042/bj2460307.

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Six regions (T sites) of myoglobin (Mb) were found by a comprehensive synthetic strategy to stimulate Mb-primed lymph-node cells. To define precisely the N-terminal boundary of the immunodominant T site (residues 107-120) with site-specific T-cell clones and to determine the effects of peptide size on their stimulation, two sets of peptides were employed. In one set, the peptides were elongated to the left from His-113 by one-residue increments of the Mb sequence. The other set represented an identical stepwise elongation by one-residue increments of the Mb sequence, but which were extended by

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Xu, Chunyuhang, Siyu Chen, Tiange Liu, et al. "Antrodia cinnamomea Residual Biomass-Based Hydrogel as a Novel UV-Protective and Antimicrobial Wound-Healing Dressing for Biomedical Use." International Journal of Molecular Sciences 26, no. 10 (2025): 4496. https://doi.org/10.3390/ijms26104496.

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Antrodia cinnamomea is widely known for its bioactive properties, particularly in anti-cancer, anti-inflammatory, and antibacterial areas. Despite the full use of the bioactive compounds from its fruiting body, high-value residues remain largely underexploited. This study presents a novel one-pot gel formation method, utilizing cinnamomea cellulose-riched residues to create hydrogels as an effective wound-healing dressing. The hydrogels derived from these residues show desirable properties, including non-drying characteristics, antibacterial activity against Staphylococcus aureus ATCC 1768, an

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35

Hoffman, Melinda L., Leslie A. Weston, John C. Snyder, and Emilie E. Regnier. "Separating the Effects of Sorghum (Sorghum bicolor) and Rye (Secale cereale) Root and Shoot Residues on Weed Development." Weed Science 44, no. 2 (1996): 402–7. http://dx.doi.org/10.1017/s0043174500094078.

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Greenhouse experiments that used capillary mat subirrigation to maintain constant soil moisture and to supply fertilizer continuously were conducted to evaluate the effects of sorghum or rye residue on early growth of barnyardgrass and velvetleaf. The separate effects of root residue and of shoot residue were compared to the combined effects of root plus shoot residues and to an uncovered soil control. Residues included as nontoxic controls were leached shoot tissue and poplar excelsior. Shoot residue, leached shoot tissue, and poplar excelsior were surface-applied on an equal light transmitta

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Cotten, T. K., and G. P. Munkvold. "Survival of Fusarium moniliforme, F. proliferatum, and F. subglutinans in Maize Stalk Residue." Phytopathology® 88, no. 6 (1998): 550–55. http://dx.doi.org/10.1094/phyto.1998.88.6.550.

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The roles of residue size and burial depth were assessed in the survival of Fusarium moniliforme, F. proliferatum, and F. subglutinans in maize stalk residue. Stalk pieces (small or large sizes) were soaked in a spore suspension of F. moniliforme, F. proliferatum, or F. subglutinans and placed in a field on the soil surface or buried at 15- or 30-cm depths. Residue pieces were recovered periodically, cultured on a selective medium, and microscopically examined for the presence of the inoculated Fusarium species. After 630 days, the inoculated Fusarium species were recovered from 0 to 50% of th

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37

Ebikiton, Ndiwari, and Ongodiebi Zuonaki. "Time Impact on Residue in a Non - homogeneous Equation of Statics in the Theory of Elastic Mixture." International Journal of Mathematics And Computer Research 09, no. 05 (2021): 2303–8. https://doi.org/10.47191/ijmcr/v9i5.04.

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Residual stress in continuum has not been quantified because time relationship with residues has not been proven analytically. This is achieved in this paper by analyzing a two component mixture with the non-homogeneous equation of statics in the theory of elastic mixture, and second order differentialequations with variable coefficients. A dry mixture of sand and cement is transformed into acontinuum, which is been determined as an entire or a meromorphic function, as a result of the existence of residues that are contained in the principal component of the mixture obtained directly from the

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38

Burgess, M. S., G. R. Mehuys, and C. A. Madramootoo. "Decomposition of grain-corn residues (Zea mays L.): A litterbag study under three tillage systems." Canadian Journal of Soil Science 82, no. 2 (2002): 127–38. http://dx.doi.org/10.4141/s01-013.

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This study was undertaken to obtain litterbag decomposition data for grain-corn residues in eastern Canadian conditions, to determine tillage and/or depth effects on residue mass loss, and to compare decomposition patterns for the different plant parts that constitute the residue (cobs, stems, leaves, husks). Mesh bags containing residues were buried or left on the soil surface in grain-corn plots under no-till, reduced tillage, and conventional tillage, and retrieved over a 2-yr period. Data were obtained separately for each plant part, then used to calculate pooled totals for all residues co

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39

SILFRANY, R. O., R. E. CABA, F. SOLÍS de LOS SANTOS, and I. HANNING. "Detection of Quinolones in Poultry Meat Obtained from Retail Centers in Santiago Province, the Dominican Republic." Journal of Food Protection 76, no. 2 (2013): 352–54. http://dx.doi.org/10.4315/0362-028x.jfp-12-310.

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In the Dominican Republic, poultry consumption per capita is greater than 34 kg of poultry meat per year. However, antibiotics, specifically the quinolone group, may be overused and can result in residues in the poultry meat. These residues are of concern because consumers may have allergies to antibiotics and antibiotic-resistant bacteria can develop from overuse of antibiotics in production. Little is known concerning this issue specifically for Santiago Province in the Dominican Republic. Thus, the main purpose of this research was to evaluate the incidence of residual quinolones in poultry

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Jaber, Ali, Zeinab Zahreddine, Simon Abou Haidar, Chadi Hosri, Ghassan Ibrahim, and Edmond Cheble. "HPLC-DAD multi-residue method for determination of florfenicol, penicillin and tetracycline residues in raw cow milk." Journal of Clinical and Laboratory Research 2, no. 3 (2021): 01–08. http://dx.doi.org/10.31579/2768-0487/017.

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The existence of antibiotic residues in edible products constitutes a health problem to the consumers. Reversed-phase high-performance liquid chromatography with diode array detection (HPLC–DAD) was optimized and validated for the simultaneous determination of florfenicol (FF), penicillin (PE), and tetracycline (TC) residues in dairy raw milk samples. The determination of these antibiotics was carried out on HP-ODS Hypersil C18 (5μm, 125*4 mm) column at a flow rate (1mL/min) and temperature (35 ⁰C). The extraction method includes deproteinization of the milk sample followed by a solid-phase ex

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41

Dowling, L. M., W. G. Crewther та D. A. Parry. "Secondary structure of component 8c-1 of α-keratin. An analysis of the amino acid sequence". Biochemical Journal 236, № 3 (1986): 705–12. http://dx.doi.org/10.1042/bj2360705.

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The amino acid sequence of component 8c-1 from alpha-keratin was analysed by using secondary-structure prediction techniques, homology search methods, fast Fourier-transform techniques to detect regularities in the linear disposition of amino acids, interaction counts to assess possible modes of chain aggregation and assessment of hydrophilicity distribution. The analyses show the following. The molecule has two lengths of coiled-coil structure, each about 20 nm long, one from residues 56-202 with a discontinuity from about residue 91 to residue 101, and the other from residues 219-366 with di

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42

Zamora-Cristales, Rene, John Sessions, and Gevan Marrs. "Economic implications of grinding, transporting, and pretreating fresh versus aged forest residues for biofuel production." Canadian Journal of Forest Research 47, no. 2 (2017): 269–76. http://dx.doi.org/10.1139/cjfr-2016-0221.

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The moisture content in forest harvest residues is a key factor affecting the supply cost for bioenergy production. Fresh harvest residues tend to contain higher amounts of water, thus making transportation inefficient. Additionally, fresh harvest residues contain greater amounts of needles and bark that may reduce the polysaccharide content, thus affecting the production of liquid fuels derived from cellulosic components. In this study, we estimated the downstream economic effect in the supply chain of collecting, grinding, transporting and pretreating fresh versus aged residues. Specifically

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Li, Ying Yu, Yan Yan Chu, Hao Shen, and Dong Liang. "Study on Fire Residues in Pure Cotton Fabric Combustion." Advanced Materials Research 391-392 (December 2011): 1479–82. http://dx.doi.org/10.4028/www.scientific.net/amr.391-392.1479.

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Residual accelerant from fire debris is the major evidence in the fire investigation. Because all evidences are almost damaged by fire, many isolation methods of analytical chemistry has been already used in extracting trace residue. In this paper, ultrasonic extraction is applied to isolate the residual accelerant and hexane as the solvent. The solution obtained from the residue is tested by GC-MS to analyze their total ion chromatogram (TIC). The chromatographic patterns observed for ignitable liquids are different from the patterns observed for without ignitable liquids. The composition of

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Ilari, Alessio, Daniele Duca, Kofi Armah Boakye-Yiadom, Thomas Gasperini, and Giuseppe Toscano. "Carbon Footprint and Feedstock Quality of a Real Biomass Power Plant Fed with Forestry and Agricultural Residues." Resources 11, no. 2 (2022): 7. http://dx.doi.org/10.3390/resources11020007.

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Phasing out fossil fuels to renewables is currently a global priority due to the climate change threat. Advocacy for biomass use as an energy source requires assessing the quality biomass and ecological impacts of bioenergy supply chains. This study evaluated the quality of biomass residues from orchards and silviculture transported from different Northern and Central Italy locations and the carbon footprint of a biomass power plant. The total greenhouse emissions were calculated based on primary data for 2017 according to the ISO/TS 14067. All the residue samples showed their suitability for

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Sun, Xuan, Tao Yu, Yi Huang, et al. "Effects of Different Heat Treatment Methods on Organic Pollutants and Heavy Metal Content in Oil Sludge Waste and Ecotoxicological Evaluation." Applied Sciences 12, no. 7 (2022): 3609. http://dx.doi.org/10.3390/app12073609.

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The discharge of large amounts of oily sludge heat treatment residues constitutes a severe threat to the environment. However, little is known about the toxicity of these heat-treated residues. Current research has mainly focused on the toxic effects of single heavy metals or single hydrocarbons on plants, whereas the phytotoxic effects of hydrocarbon–metal mixtures have remained largely unexplored. In this study, pot experiments were conducted to evaluate the effects of different proportions of heat treatment residues (pyrolysis, heat-washing, and high-temperature oxidation residues) from thr

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46

Cao, Zhenzhen, Xiaolong Zheng, Meiyan Guan, et al. "Cumulative Risk Assessment of Dietary Exposure to Pesticide Residues in Brown Rice (Oryza sativa L.) from the Three Main Rice-Growing Regions in China during 2016–2020." Journal of Food Quality 2022 (October 8, 2022): 1–13. http://dx.doi.org/10.1155/2022/5902540.

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The residual levels of 25 monitored pesticides in 6,229 brown rice samples obtained from the 17 provinces of the three main rice-growing regions in China during 2016–2020 were analyzed, and the cumulative risks of chronic and acute exposure to pesticides for the Chinese population were assessed. The QuEChERS extraction coupled with liquid chromatography-mass spectrometry for simultaneous determination of 25 pesticide residues in brown rice was developed and validated with good accuracy and precision (recoveries of 70%–120% and RSD ≤20%). The overall detection rate and over the maximum residue

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Afzal, Tahseen, Abdul Wakeel, Sardar Alam Cheema, Javed Iqbal, and Muhammad Sanaullah. "Influence of quality and quantity of crop residues on organic carbon dynamics and microbial activity in soil." Soil and Environment 43, no. 1 (2024): 53–64. http://dx.doi.org/10.25252/se/2024/243394.

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An incubation study investigated the decomposition patterns, microbial activities, soil aggregates distribution, and soil organic carbon (SOC) contents, using four crop residues; wheat (Triticum aestivum L.), rice (Oryza sativa L.), cotton (Gossypium hirsutum L.), and maize (Zea mays L.), at low and high rates (10 and 20 g kg–1). An average increase of about 35% in cumulative C-CO2 emissions and 26% in soil microbial biomass carbon (MBC) was observed at high residue rates as compared to low rates. A positive and strong correlation (0.96) was found between C-CO2 emissions and MBC, and the effec

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48

Namiq, Karzan, Nuha Hameed Albassam, and Nihad Khurshid Wahab. "Assessment of Pesticide Residues in Fish Tissues and Water at Various Time of the Year." Diyala Agricultural Sciences Journal 17, no. 1 (2025): 178–93. https://doi.org/10.52951/dasj.25170114.

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The present study aimed to assess three pesticide residues (hexachlorobenzene, cypermethrin and chlorpyrifos) in the muscle of common carp (Cyprinus carpio), barbus grypus (Arabibarbus grypus) and water from Dukan Lake. About 60 samples were collected from different sites on the Dukan Lake in Iraq from different seasons (November 2023 to August 2024). Fish samples were analyzed fresh and grilled for the presence of pesticide residues using the QuEChERS method for extraction and water extraction was done by solid-phase extraction method accompanied by cleanup and detection using GC–MS (gas chro

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Hui, Kwokyin, Deane McIntyre, and Robert J. French. "Conotoxins as Sensors of Local pH and Electrostatic Potential in the Outer Vestibule of the Sodium Channel." Journal of General Physiology 122, no. 1 (2003): 63–79. http://dx.doi.org/10.1085/jgp.200308842.

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We examined the block of voltage-dependent rat skeletal muscle sodium channels by derivatives of μ-conotoxin GIIIA (μCTX) having either histidine, glutamate, or alanine residues substituted for arginine-13. Toxin binding and dissociation were observed as current fluctuations from single, batrachotoxin-treated sodium channels in planar lipid bilayers. R13X derivatives of μCTX only partially block the single-channel current, enabling us to directly monitor properties of both μCTX-bound and -unbound states under different conditions. The fractional residual current through the bound channel chang

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Barry, Christopher, and Roy Duncan. "Multifaceted Sequence-Dependent and -Independent Roles for Reovirus FAST Protein Cytoplasmic Tails in Fusion Pore Formation and Syncytiogenesis." Journal of Virology 83, no. 23 (2009): 12185–95. http://dx.doi.org/10.1128/jvi.01667-09.

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ABSTRACT Fusogenic reoviruses utilize the FAST proteins, a novel family of nonstructural viral membrane fusion proteins, to induce cell-cell fusion and syncytium formation. Unlike the paradigmatic enveloped virus fusion proteins, the FAST proteins position the majority of their mass within and internal to the membrane in which they reside, resulting in extended C-terminal cytoplasmic tails (CTs). Using tail truncations, we demonstrate that the last 8 residues of the 36-residue CT of the avian reovirus p10 FAST protein and the last 20 residues of the 68-residue CT of the reptilian reovirus p14

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