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Artigos de revistas sobre o tema "Effect of perchlorates on Plants"

Autor: Grafiati

Publicado: 25 de julho de 2024

Última modificação: 31 de julho de 2024

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1

Oze, Christopher, Joshua Beisel, Edward Dabsys, Jacqueline Dall, Gretchen North, Allan Scott, Alandra Marie Lopez, Randall Holmes e Scott Fendorf. "Perchlorate and Agriculture on Mars". Soil Systems 5, n.º 3 (24 de junho de 2021): 37. http://dx.doi.org/10.3390/soilsystems5030037.

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Perchlorate (ClO4−) is globally enriched in Martian regolith at levels commonly toxic to plants. Consequently, perchlorate in Martian regolith presents an obstacle to developing agriculture on Mars. Here, we assess the effect of perchlorate at different concentrations on plant growth and germination, as well as metal release in a simulated Gusev Crater regolith and generic potting soil. The presence of perchlorate was uniformly detrimental to plant growth regardless of growing medium. Plants in potting soil were able to germinate in 1 wt.% perchlorate; however, these plants showed restricted growth and decreased leaf area and biomass. Some plants were able to germinate in regolith simulant without perchlorate; however, they showed reduced growth. In Martian regolith simulant, the presence of perchlorate prevented germination across all plant treatments. Soil column flow-through experiments of perchlorate-containing Martian regolith simulant and potting soil were unable to completely remove perchlorate despite its high solubility. Additionally, perchlorate present in the simulant increased metal/phosphorous release, which may also affect plant growth and biochemistry. Our results support that perchlorate may modify metal availability to such an extent that, even with the successful removal of perchlorate, Martian regolith may continue to be toxic to plant life. Overall, our study demonstrates that the presence of perchlorate in Martian regolith provides a significant challenge in its use as an agricultural substrate and that further steps, such as restricted metal availability and nutrient enrichment, are necessary to make it a viable growing substrate.

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Gureeva, Maria V., e Artem P. Gureev. "Molecular Mechanisms Determining the Role of Bacteria from the Genus Azospirillum in Plant Adaptation to Damaging Environmental Factors". International Journal of Molecular Sciences 24, n.º 11 (23 de maio de 2023): 9122. http://dx.doi.org/10.3390/ijms24119122.

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Agricultural plants are continuously exposed to environmental stressors, which can lead to a significant reduction in yield and even the death of plants. One of the ways to mitigate stress impacts is the inoculation of plant growth-promoting rhizobacteria (PGPR), including bacteria from the genus Azospirillum, into the rhizosphere of plants. Different representatives of this genus have different sensitivities or resistances to osmotic stress, pesticides, heavy metals, hydrocarbons, and perchlorate and also have the ability to mitigate the consequences of such stresses for plants. Bacteria from the genus Azospirillum contribute to the bioremediation of polluted soils and induce systemic resistance and have a positive effect on plants under stress by synthesizing siderophores and polysaccharides and modulating the levels of phytohormones, osmolytes, and volatile organic compounds in plants, as well as altering the efficiency of photosynthesis and the antioxidant defense system. In this review, we focus on molecular genetic features that provide bacterial resistance to various stress factors as well as on Azospirillum-related pathways for increasing plant resistance to unfavorable anthropogenic and natural factors.

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He, Hongzhi, Haishuo Gao, Guikui Chen, Huashou Li, Hai Lin e Zhenzhen Shu. "Effects of perchlorate on growth of four wetland plants and its accumulation in plant tissues". Environmental Science and Pollution Research 20, n.º 10 (15 de maio de 2013): 7301–8. http://dx.doi.org/10.1007/s11356-013-1744-4.

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Ismail Saleh, Al Sammarrai Anes, V. V. Korobko, N. V. Pchelintseva e E. A. Samsonova. "Effect of Polysubstituted Perchlorates Halkogen(Thio)Pyrilium on Morphogenesis of Wheat Seedlings". Chemistry. Biology. Ecology 17, n.º 4 (2017): 413–19. http://dx.doi.org/10.18500/1816-9775-2017-17-4-413-419.

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5

Góbi, Sándor, Matthew J. Abplanalp e Ralf I. Kaiser. "EFFECT OF PERCHLORATES ON ELECTRON RADIOLYSIS OF GLYCINE WITH APPLICATION TO MARS". Astrophysical Journal 822, n.º 1 (26 de abril de 2016): 8. http://dx.doi.org/10.3847/0004-637x/822/1/8.

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6

Kim, Shin-Jo, Ki-Yong Lee, Ki-Cheol Lee, Namil Chung e Dong-Il Jung. "Effect of general ions on biological treatment of perchlorates in smelting wastewater". Desalination and Water Treatment 48, n.º 1-3 (outubro de 2012): 60–69. http://dx.doi.org/10.1080/19443994.2012.698795.

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Ouédraogo, Jean Claude W., Edouard Tapsoba, Sié Faustin Sib e Yvonne Libona Bonzi-Coulibaly. "Styrylpyrylium Salts: and NMR High-Resolution Spectroscopy (1D and 2D)". International Journal of Spectroscopy 2010 (29 de junho de 2010): 1–6. http://dx.doi.org/10.1155/2010/246821.

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and NMR high-resolution spectroscopy (1D and 2D) (, -COSY, HSQC, HMBC) for four styrylpyrylium perchlorates were carried out and signal attributions are reported. Chemical shifts observed on NMR spectra for the styrylpyrylium salts were compared with net atomic charge for carbon obtained by AM1 semiempirical calculations. The position of the styryl group present low effect on chemical shifts for carbon atoms, while the presence of methyl group led to the unshielding of the substituted carbon.

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Knop, Jim-Marcel, Sanjib K. Mukherjee, Stewart Gault, Charles S. Cockell e Roland Winter. "Structural Responses of Nucleic Acids to Mars-Relevant Salts at Deep Subsurface Conditions". Life 12, n.º 5 (2 de maio de 2022): 677. http://dx.doi.org/10.3390/life12050677.

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High pressure deep subsurface environments of Mars may harbor high concentrations of dissolved salts, such as perchlorates, yet we know little about how these salts influence the conditions for life, particularly in combination with high hydrostatic pressure. We investigated the effects of high magnesium perchlorate concentrations compared to sodium and magnesium chloride salts and high pressure on the conformational dynamics and stability of double-stranded B-DNA and, as a representative of a non-canonical DNA structure, a DNA-hairpin (HP), whose structure is known to be rather pressure-sensitive. To this end, fluorescence spectroscopies including single-molecule FRET methodology were applied. Our results show that the stability both of the B-DNA as well as the DNA-HP is largely preserved at high pressures and high salt concentrations, including the presence of chaotropic perchlorates. The perchlorate anion has a small destabilizing effect compared to chloride, however. These results show that high pressures at the kbar level and perchlorate anions can modify the stability of nucleic acids, but that they do not represent a barrier to the gross stability of such molecules in conditions associated with the deep subsurface of Mars.

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Marin, Alexandru, Maria-Daniela Sandu, George-Ovidiu Iorga, Gabriel Epure e Dănuț Moşteanu. "SEM/EDX and FTIR/ATR Behavior of Ammonium Perchlorate Under Accelerated Aging in a New Solid Rocket Motor Fuel Composition with Superior Explosive and Mechanical Performance". International conference KNOWLEDGE-BASED ORGANIZATION 30, n.º 3 (1 de junho de 2024): 1–7. http://dx.doi.org/10.2478/kbo-2024-0088.

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Abstract The oxidation potential of perchlorates is high, which makes this material suitable for fuels with high specific impulse. Perchlorates are characterized by a ClO4- moiety/anion in their molecular structure and are crystalline materials used in the formation of solid fuels. Ammonium perchlorate (AP) particle size and shape influence the manufacturing process of fuels and their burning rate. The physical and chemical processes that can occur in the natural degradation process of composite fuels are related to molecular reactions and diffusion phenomena governed by kinetic processes and can be accelerated by increasing the temperature. The paper presents studies carried out by scanning electron microscopy and infrared spectrometry on the behavior of ammonium perchlorate in the new composite material of solid rocket motor fuel under the effect of high temperature, in the range of 65-85οC, at regular time intervals. The self-initiation temperature was also determined, with a temperature rise rate controlled at 5ºC/minute. It is very likely that these accelerated aging studies will show the changes that occur in the stability, sensitivity, mechanical and functional properties of fuels during their lifetime.

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Penov Gaši, Katarina M., Dušica Rackov Čolic, Otto N. Arcson, Zvonimir O. Sakač, Evgenija A. Djurendić, Marija N. Sakač, Ljubica Medic-Mijačevic e Dušan A. Miljković. "Improved Methods for Obtaining Immonium Perchlorates and Enamines of Solanidine Type Steroidal Alkaloids". Collection of Czechoslovak Chemical Communications 61, n.º 11 (1996): 1655–61. http://dx.doi.org/10.1135/cccc19961655.

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Oxidation of solanidine and some of its derivatives with mercury(II) acetate in acetone afforded corresponding N-22 immonium perchlorates or 22(23)-enamines. It has been found that the effect of solvents on regioselectivity e.g. formation N-22 and N-16 immonium salts, was remarkable. The isomerisation of 22(23)-enamines into corresponding 20(22)-enamines, potentialy important intermediates in planned chemical degradation of solanidine to steroidal hormones, was performed in 0.1% acetic acid in ether, or in dichloromethane (chloroform).

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Casaschi, Adele, Giovanni Desimoni, Giuseppe Faita, Anna Gamba Invernizzi, Simonetta Lanati e PierPaolo Righetti. "Catalysis with inorganic cations. 2. The effect of some perchlorates on Diels-Alder reaction rates". Journal of the American Chemical Society 115, n.º 18 (setembro de 1993): 8002–7. http://dx.doi.org/10.1021/ja00071a010.

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Polinski, Matthew J., Shuao Wang, Evgeny V. Alekseev, Justin N. Cross, Wulf Depmeier e Thomas E. Albrecht-Schmitt. "Effect of pH and Reaction Time on the Structures of Early Lanthanide(III) Borate Perchlorates". Inorganic Chemistry 51, n.º 21 (9 de outubro de 2012): 11541–48. http://dx.doi.org/10.1021/ic301421e.

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13

Seyfferth, Angelia L., Maya K. Henderson e David R. Parker. "Effects of common soil anions and pH on the uptake and accumulation of perchlorate in lettuce". Plant and Soil 302, n.º 1-2 (6 de dezembro de 2007): 139–48. http://dx.doi.org/10.1007/s11104-007-9461-8.

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Choji, Solomon, Faith Damla, Larry Barde, Riyang Zakka e Adeshola Adegbite. "ANTI-DIABETIC EFFECTS OF ETHANOL LEAF EXTRACT OF ONIONS (Allium cepa) ON ALLOXAN-INDUCED DIABETIC WISTAR ALBINO RATS". BOKKOS JOURNAL OF APPLIED SCIENTIFIC REPORTS 1, n.º 2 (14 de março de 2021): 19–34. http://dx.doi.org/10.47452/bjasrep.v1i2.22.

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ANTI-DIABETIC EFFECTS OF ETHANOL LEAF EXTRACT OF ONIONS (Allium cepa) ON ALLOXAN-INDUCED DIABETIC WISTAR ALBINO RATS Choji Solomon S. Department of Biochemistry, Faculty of Natural and Applied Sciences, Plateau State University, Bokkos. P.M. B 2012, Jos. Nigeria. Chojisolomon@gmail.com +2347065752410 Damla Faith U. Department of Biochemistry, Faculty of Natural and Applied Sciences, Plateau State University, Bokkos. P.M. B 2012, Jos. Nigeria Barde Larry A. Department of Biochemistry, Faculty of Natural and Applied Sciences, Plateau State University, Bokkos. P.M. B 2012, Jos. Nigeria Zakka Riyang. Department of Food Science and Technology, Faculty of Agricultural Science, Federal University Wukari. P.M.B 1020 Adegbite Adeshola. Ladoke Akintola University of Technology. Ogbomoso. Oyo State. Abstract. Diabetes is a chronic disease characterised by high blood glucose level and abnormal metabolism of carbohydrates, protein and fat. The condition is characterised by persistent hyperglycaemia. Allium cepa leaf is a functional food used in traditional medicine for the treatment of diabetes mellitus. The use of plants especially vegetable as antidiabetic remedies have added interest of joining two basic diabetes mellitus control factors: food and medication. The ethanol extract of Allium cepa leaf was investigated for antidiabetic effects using alloxan- induced diabetic wistar albino rats. Wistar albino rats were randomly divided into six groups; Group A rats were non-diabetic control. Diabetes was induced in groups B, C, D, E and F by single intraperitoneal injection of alloxan (150mg/kg body weight). Group B were not treated and served as negative control group. Group C were treated with glibenclamide (5mg/kg body weight), thus served as postive control group. Groups D, E and F were treated with 200, 300 and 400 mg/kg body weight of the extract respectively for a period of two weeks through intraperitoneal route. The effect of treatment with the doses of the extract and standard drug were studied on blood glucose level, total serum cholesterol and body weight. Allium Cepa extract produced a dose- dependent significant reduction in the blood glucose level when compared with that of the control group. Significant total serum cholesterol reduction was observed at 300 and 400mg/kg. An observed decrease in body weight of the negative control group was recorded and significant increase for all other groups. The findings from this study indicate that the crude extract of Allium cepa leaf caused a significant hypoglycaemic and hypocholesterolemic activity in alloxan-induced diabetic rats thus, validates its use in ethno – medicine for the control of diabetes mellitus. KEY WORDS: Diabetes mellitus, Allium cepa, Alloxan, Blood glucose, Cholesterol Glibenclamide. 1.0 INTRODUCTION. Diabetes Mellitus (DM) is a group of metabolic disorders associated with disturbances in the metabolism of fuel molecules due to absolute deficiency of insulin, insufficient insulin secretion and / or its secretion [1]. It is a disorder that affects the body’s ability to make or use insulin. Insulin is a hormone produced in the pancreas that helps transport glucose (blood sugar) from the bloodstream into the cells so they can break it down and use it for fuel. People cannot live without insulin [2]. It is also a widespread endocrine disorder that is associated with considerable morbidity and mortality and is found in all population throughout the world [3] Despite the presence of anti-diabetic drugs in the pharmaceutical market, the treatment of diabetes with medicinal plants is often successful. Herbal medicine and plant components with insignificant toxicity and less or no side effect are notable therapeutic options for the treatment of this disease around the world [4]. The most common herbal active ingredients used in treating diabetes are flavonoids, tannins, phenols and alkaloids [5]. The existence of these compounds implies the importance of the anti-diabetic properties of these plants [4]. Allium cepa is one of the recognised medicinal plants known to possess several medicinal properties including lowering of blood pressure, antiseptic, hypoglycaemic and hypocholesterolemic activity [6]. In the rural communities, many people depend solely on medicinal plants for the treatment of diabetes due to its easy accessibility, affordability and availability even when the efficacy of the herbal remedies has not been established [6]. Dietary therapy is unarguably the best treatment for diabetes. The diabetic diet should be carefully monitored to minimize the load placed on the blood glucose regulating mechanism. The use of plants, especially vegetables, by the population as antidiabetic remedies has added interest of joining two basic diabetes mellitus control factors: food and medication [7]. This research is thus geared towards finding a medicinal plant that will not only increase the energy content of diabetics but also lower glycaemic index properties for the management of diabetic pressures in our society. 2.0 MATERIALS AND METHODS. 2.1 Materials. 2.1.1 Chemicals and Reagents. Baker Ltd Dagenham, England, BDH Chemicals Ltd; Poole England, Sigma Chemicals, St Louis, USA, Emzor Pharmaceuticals Industry Ltd, Nigeria and Randox Laboratories. London, UK. 2.1.2 Plant The Allium cepa leaves used for the experiment was bought from Barkin Ladi Market, Plateau State, Nigeria. The plants were identified by Professor Pob Poppva in the Department of Botany, University of Jos, Plateau State. A voucher specimen was deposited in the herbarium unit of the department. 2.1.3 Experimental Animals. A total of thirty-six (36) adult male Wistar albino rats weighing 80 to 150g and twelve (12) mice were used for the experiment. The experimental animals were purchased from Chris Animal Farm, G.R.A. Awka. They were housed six (6) rats per cage at the experimental Animal House of Biochemistry Department, Nnamdi Azikiwe University, Awka, Anambra State. They were acclimatized for two weeks under standard laboratory conditions and were maintained on water and Guinea growers mash pellet (Vital Feed Grand Cereals Nigeria Ltd, Jos, Nigeria) that was obtained from Eke Market, Awka, Anambra State. 2.2 Methods 2.2.1 Preparation of ethanol leaf extract of Allium cepa . The leaves of Allium cepa were properly washed with distilled water and dried at room temperature for three weeks. The dried leaves were then pulverised using corona manual grinding machine. The powdered samples of Allium cepa was weighed and exactly 1475g was extracted in 5 litres of 80% ethanol for 24 hours with occasional stirring, sieved and filtered using filter paper (Whatman number 1). The filtrate was then concentrated using a rotary evaporator at 600C and appeared as a dark brown gel solid. The extracts were kept in a labelled glass container and stored in a refrigerator until when required for reconstitution and administration. 2.2.2 Phytochemical Screening of Secondary metabolites(Constituents) The qualitative phytochemical screening of the ethanol leaf extract of Allium cepa was carried out using standard procedures as outlined by [8], [9]. 2.2.3 Acute toxicity and Median Lethal Dose (LD50) test of ethanol leaf extract of Allium cepa. The median Lethal Dose (LD50) was determined using Wistar albino mice as described by the modified method of [10]. Test animals were divided into six (6) groups. The first 3 groups which contain 3 animals each were given 10mg/kg, 100mg/kg and 1000mg/kg body weight of the ethanol extract of Allium Cepa leaves. The Allium Cepa extract was administered orally and was monitored for 24 hours. The last 3 groups which contain one animal each per group were then given 1600mg/kg, 2900mg/kg and 5000mg/kg body weight of the ethanol extract of Allium Cepa leaves and were observed for 24 hours. 2.2.4 Induction of Diabetes. Alloxan was prepared and induced by adopting the method of [11]. All rats, except for the normal control group were intraperitoneally injected with 150mg/kg body weight of the prepared alloxan dissolved in normal saline solution. The blood glucose levels of the rats were checked before the administration of alloxan using one touch glucometer (Fine touch, USA) and test strips. The rats were then fasted for 16 hours, but with free access to water after which they received an intraperitoneal injection of alloxan 150mg/kg body weight. The rats were orally given 20ml each of 10% glucose solution after 2 hours to prevent hypoglycaemia. The animals were allowed free access to food and water after alloxan administration. After 48 hours of the alloxan administration, blood was collected orbito-rectally and their glucose levels were checked using one touch glucometer and test strips. Diabetes was confirmed to have been induced if the glucose level was observed to be far much higher than normal (above 140mg/dl). 2.2.5 Experimental Design This study was carried out on alloxan –induced diabetic rats for two (2) weeks. A total of thirty-six (36) Wistar albino rats were used for the experiment. The albino rats were randomly divided into six (6) groups with six (6) rats in each group. The extract and the reference drug were administered intraperitoneally to the animals. Group A – Normal (non-diabetic control) Group B – Diabetic (negative) control group Group C – Diabetic (positive) control – this group received 5mg/kg body weight of glibenclamide. Group D – This group received 200mg/kg body weight of the extract. Group E – This group received 300mg/kg body weight of the extract. Group F – This group received 400mg/kg body weight of the extract The weights of the animals were carefully monitored before the induction and throughout the duration of the experiment. 2.2.6 Biochemical Assay 2.2.6.1 Blood glucose level determination Determination of the blood glucose level was done by the glucose-oxidase principle [12] using the one touch instrument and results were reported as mg/dl [13]. 2.2.6.2 Determination of total serum cholesterol. The cholesterol of the serum was oxidised to tetraene derivative by ferric ions derived from ferric perchlorate using four different test tubes that were marked test, control, standard and blank. The absorbance was measured (using spectrophotometer) at 590nm wavelength and compared with that of a pure solution of cholesterol [14]

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Knyazev, A. V., A. V. Dolganov, L. A. Klimaeva, S. G. Kostryukov, A. Sh Kozlov, A. D. Yudina e O. V. Tarasova. "Electrocatalytic Reduction of CO2 when Using N-Substituted Salts of 2,4,6-Triphenylpyridine". Журнал физической химии 97, n.º 8 (1 de agosto de 2023): 1097–105. http://dx.doi.org/10.31857/s0044453723080058.

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A study is performed of the electrocatalytic activity of substituted pyridine salts (N-hydro-, N‑methyl-, and N-phenyl-2,4,6-triphenylpyridinium perchlorates) in the electroreduction of carbon dioxide to carbon monoxide. The effect the natures of the substituent and the H+ source have on the efficiency of the process is determined. The main reasons for the occurrence of the electrocatalytic process are identified, and the values of TOF (catalyst speed) and TON (number of revolutions of the catalyst) are calculated. It is shown that the values of TOF and TON fall as the pK of the acid rises.

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Polinski, Matthew J., Shuao Wang, Evgeny V. Alekseev, Justin N. Cross, Wulf Depmeier e Thomas E. Albrecht-Schmitt. "ChemInform Abstract: Effect of pH and Reaction Time on the Structures of Early Lanthanide(III) Borate Perchlorates." ChemInform 44, n.º 7 (12 de fevereiro de 2013): no. http://dx.doi.org/10.1002/chin.201307015.

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Kuzin, A. V., I. G. Gorichev, E. A. Eliseeva e L. E. Slynko. "The Effect of Stoichiometry of Iron (II) and (III) and Magnetite Oxides on the Kinetic Regularities of their Dissolution in Orthophosphoric Acid Containing Fe (II) and Fe (III) Ions". Herald of the Bauman Moscow State Technical University. Series Natural Sciences, n.º 83 (2019): 104–13. http://dx.doi.org/10.18698/1812-3368-2019-2-104-113.

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The kinetics of dissolution of iron oxides FeO, α-Fe2O3 and Fe3O4 in orthophosphoric acid, including those containing additions of Fe (II) and Fe (III) ions (in the form of perchlorates), has been studied. The values of the stationary potential in the magnetite electrode system--solutions of orthophosphoric acid, including those containing additions of Fe (II) and Fe (III) ions are determined. The dissolution of Fe3O4 in orthophosphoric acid has been studied and described. Based on the experimental results, it was established that the stimulating and inhibitory effect of Fe (II) and Fe (III) ions is related to their effect on the value of the potential at the boundary of the iron oxide phases/electrolyte solution. The orders of reactions for ions Fe (II), Fe (III) and H3PO4 are determined

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Page, Michael Le. "Climate's surprise effect on plants". New Scientist 238, n.º 3175 (abril de 2018): 15. http://dx.doi.org/10.1016/s0262-4079(18)30737-1.

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Gupta, Akshat. "Effect of Music on Plants". International Journal of Science and Research (IJSR) 12, n.º 10 (5 de outubro de 2023): 28–29. http://dx.doi.org/10.21275/sr23924093613.

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Sugiyarto, KH, DC Craig, AD Rae e HA Goodwin. "Structural and Electronic Properties of Iron(II) and Nickel(II) Complexes of 2-Triazolyl-1,10-phenanthroline Derivatives". Australian Journal of Chemistry 49, n.º 4 (1996): 505. http://dx.doi.org/10.1071/ch9960505.

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Salts of the [FeN6]2+ derivatives of the tridentate systems 2-(triazol-3-yl)-1,10-phenanthroline, 2-(1-methyltriazol-3-yl)-1,10-phenanthroline, 2-(5-methyltriazol-3-yl)-1,10-phenanthroline and 2-(1,5-dimethyltriazol-3-yl)-1,10-phenanthroline undergo temperature-induced singlet (1A1) ↔ quintet (5T2) transitions in both the solid state and in solution. Both the nature of the associated anion and the extent of solvation of the salts influence the extent of the transition in solid samples. The solution behaviour has been interpreted in terms of a simple thermal equilibrium involving the two spin states. Electronic spectra of corresponding nickel(II) complexes establish that the field strengths for all ligands fall within a narrow range, but suggest that the order is influenced by electronic effects of the methyl substituents . Structural data indicate that a 5-methyl substituent exerts a small steric barrier to coordination of the triazolyl moiety. Data were obtained at 298 K for [FeL2] [ClO4]2.H2O.C2H5OH (L = 2-(1-methyltriazol-3-yl)-1,10-phenanthroline) and [FeL2] [ClO4]2.3H2O (L = 2-(5-methyltriazol-3-yl)-1,10-phenanthroline). The average Fe-N distance in the former complex is 1.96 Ǻ and in the latter 1.97 Ǻ, indicating that in both instances the metal is essentially in the singlet state in these crystals. The ligands coordinate in meridional planes of an octahedron and give a distorted environment about the metal atom, the Fe- Ncentral distances being significantly shorter than the Fe-Ndistal distances in both instances. This distortion results in unusually large quadrupole splitting in the Mossbauer spectra for the complexes in the singlet state. Bis [2-(1-methyltriazol-3-yl)-1,10-phenanthroline]iron(II) perchlorate monohydrate monoethanolate : triclinic, space group Pī , a 9.423(4), b 10.536(4), c 19.402(8) Ǻ, α 75.59(3), β 85.80(3), γ 68.76(3)°, Z 2. Bis [2-(5-methyltriazol-3-yl)-1,10-phenanthroline ]iron(II) perchlorate trihydrate : tetragonal, space group P41212, a 14.676(3), c 16.169(3) Ǻ, Z 4.

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Wang, Shiow Y., e Gene J. Galletta. "Effect of Silicon on Strawberry Plants". HortScience 31, n.º 4 (agosto de 1996): 675d—675. http://dx.doi.org/10.21273/hortsci.31.4.675d.

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The effect of silicon (Si) foliar applications on metabolic changes and powdery mildew infection in strawberry plants were determined. Silicon was used in the forms of potassium (K) and sodium (Na) salts. Foliar sprays containing 0, 250, 500, 750, and 1000 ppm of Si were applied. Strawberry plants showed no difference in response to the K or Na salts of Si during the seven weeks of experimental period. Plants treated with potassium and sodium silicate showed reduced severity of powdery mildew, increased chlorophyll content, and increased plant growth. Potassium and sodium silicate treatments also induced metabolic changes such as an increase in citric acid and malic acid levels, and a decrease in fructose, glucose, sucrose, and myoinositol content. The treated tissues also had higher ratios of (18:2 + 18:3)/18:1 in glycolipids and phospholipids and elevated amounts of membrane lipids in leaves and petioles. These results suggest that Si has beneficial effects on strawberry plants and may serve as an alternative to fungicides for controlling powdery mildew.

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Rounkova, L. V. "CYTOKININS' EFFECT ON SOME ORNAMENTAL PLANTS". Acta Horticulturae, n.º 167 (abril de 1985): 69–78. http://dx.doi.org/10.17660/actahortic.1985.167.6.

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Verma, Moni, Mukti Verma e Achal Kiran. "Effect of ultraviolet radiation on plants". Annals of Horticulture 12, n.º 2 (2019): 150. http://dx.doi.org/10.5958/0976-4623.2019.00023.9.

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Bhat, N. R., M. K. Suleiman, R. R. Bellen e L. AL-Mulla. "Mulching effect on selected ornamental plants". Journal of Applied Horticulture 06, n.º 02 (15 de dezembro de 2004): 102–5. http://dx.doi.org/10.37855/jah.2004.v06i02.22.

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Amin, Afaf, Atef El-Sayed, Menrvat Foad e Osama Rashwan. "Antimicrobial effect of some Egyptian plants". Egyptian Journal of Nutrition and Health 1, n.º 1 (1 de janeiro de 2006): 1–31. http://dx.doi.org/10.21608/ejnh.2006.4799.

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Sengupta, Saumitra, Subir Kumar Sadhukhan e Sanchita Bhattacharyya. "Probing the effect of gegenions in Heck reactions of arenediazonium salts: Arenediazonium perchlorates and fluorides as new Heck-substrates". Tetrahedron 53, n.º 6 (fevereiro de 1997): 2213–18. http://dx.doi.org/10.1016/s0040-4020(96)01124-6.

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Stygar, J., A. Biernat, A. Kwiatkowska, P. Lewandowski, A. Rusiecka, A. Zalewska e W. Wieczorek. "Effect of Cation and Salt Concentration on Conductivity and Microstructure Characteristics of Polyether Electrolytes Doped with Alkali Metal Perchlorates". Journal of Physical Chemistry B 108, n.º 14 (abril de 2004): 4263–67. http://dx.doi.org/10.1021/jp030894k.

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Fayiga, Abioye O. "Remediation of inorganic and organic contaminants in military ranges". Environmental Chemistry 16, n.º 2 (2019): 81. http://dx.doi.org/10.1071/en18196.

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Environmental contextContaminants occur in the soil and water associated with military ranges. This review article describes how the extent of contamination depends not only on the type of military range and its period of activity, but also on the chemistry of both the soil and the contaminant. A full understanding of the soil chemistry is necessary to develop effective remediation methods for the restoration of these impacted environments. AbstractThis review discusses the contaminants associated with military ranges and the approaches taken to remediate these sites. The type and extent of contamination depends on the type of range, period of activity, soil chemistry and contaminant chemistry. Small arms firing ranges typically have high concentrations of metals and metalloids whereas military ranges typically have high concentrations of perchlorates, white phosphorus, explosives and propellants. For explosives, higher concentrations are found in sites that have undergone a low order detonation than in sites with a high order detonation. Remediation technologies for small arms firing ranges include leaching and immobilisation whereas for military ranges, methods such as alkaline hydrolysis, photolysis, bioremediation and phytoremediation have been tested. A lot of work has been done to immobilise metals/metalloids using soil amendments, which show a high effectiveness in stabilising them. Some of these amendments, however, also mobilise other co-contaminants. More studies are needed to simultaneously immobilise all inorganic contaminants. Explosives can be transformed into simpler non-toxic forms by photolysis, bioremediation or phytodegradation. The introduction of bacteria transgenes into plants has been used to enhance uptake and degradation of explosives in transgenic plants. Adoption of appropriate remediation technologies in impacted military ranges will reduce contaminant levels and protect public health.

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Desimoni, Giovanni, Giuseppe Faita e PierPaolo Righetti. "Catalysis with inorganic cations. III. The effect of perchlorates on the competition between intramolecular hetero-Diels-Alder and ene reactions". Tetrahedron Letters 36, n.º 16 (abril de 1995): 2855–58. http://dx.doi.org/10.1016/0040-4039(95)00366-k.

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Ainy, Noer Sarifah, e Nestiyanto Hadi. "MAKING LEARNING MEDIA FOR GREENBOX EFFECT SIMULATOR TO IMPROVE UNDERSTANDING OF THE CONCEPT OF THE GREENHOUSE EFFECT". JHSS (JOURNAL OF HUMANITIES AND SOCIAL STUDIES) 5, n.º 1 (31 de março de 2021): 11–16. http://dx.doi.org/10.33751/jhss.v5i1.3198.

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The earth is experiencing global warming due to an increase in air temperature (greenhouse effect). This is due to the large number of greenhouse gases produced by human activities. In addition, it is also due to the reduced number of plants that absorb greenhouse gases, especially carbon dioxide. This condition causes the study of the greenhouse effect to become an object studied by students at school. Understanding the greenhouse effect is somewhat difficult if only understood in theory. Increasing understanding can be done by making practicum learning media. This study aims to create learning media for the Greenbox Effect Simulator to help understand the concept of the greenhouse effect. The research was conducted using control variables and independent variables (use of plants and without plants). The plants used are Caisim, Sri Gading and Anggrek. The presence of carbon dioxide (CO2) greenhouse gases can be detected by three things, namely changes in the color of the CO2 indicator, changes in temperature, and visibility of the box. The color of the CO2 indicator shows green and green yellow for Box B (with plants) which means the concentration of CO2 in normal conditions. Whereas Box C (without plants) gives a yellow color, which means that the concentration of CO2 is at high conditions. The presence of carbon dioxide gas from combustion will increase the temperature by 1.4 - 1.9 oC in Box C (without plants) and 0.7 - 1.5 oC in Box B (use of plants). The visibility of Box B shows a higher brightness level than Box C. The best plants that can absorb CO2 concentrations are orchids. The ability of orchids to absorb CO2 is assisted by their roots which also function to carry out photosynthesis. The existence of plants functions to absorb CO2 quite well when viewed from changes in temperature, color indicators and visibility.

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Eltayeb, A., e K. Ibrahim. "Potential antileishmanial effect of three medicinal plants". Indian Journal of Pharmaceutical Sciences 74, n.º 2 (2012): 171. http://dx.doi.org/10.4103/0250-474x.103856.

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Ali Esmail Al-Snafi. "Medicinal plants with lactogenic effect: A review". GSC Biological and Pharmaceutical Sciences 19, n.º 2 (30 de maio de 2022): 114–21. http://dx.doi.org/10.30574/gscbps.2022.19.2.0179.

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Milk production is essential for optimal feeding of infants. The most common lactogenic drugs are dopamine 2 antagonists, oxytocin, recombinant bovine somatotropin (rBST), thyrotropin releasing hormone (TRH) and estrogenic drugs. However, many medicinal plants possess lactogenic effects in humans and animals. The current review focused on medicinal plants with lactogenic effect as natural sources of galactogogues characterized by efficacy and safety.

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Ali Esmail Al-Snafi. "Blood lipids lowering effect of medicinal plants". GSC Biological and Pharmaceutical Sciences 19, n.º 3 (30 de junho de 2022): 015–43. http://dx.doi.org/10.30574/gscbps.2022.19.3.0213.

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Hyperlipidemia refers to elevated levels of lipids and cholesterol in the blood. It plays an important role in the development of atherosclerosis, the main cause of death in the world. Medicinal plants can lower blood lipids by many mechanisms included inhibition of the expression of fatty acid synthase, decreasing free fatty acid release, inhibition of HMG-CoA reductase, increasing the fecal excretion of fat and cholesterol, inhibition of the activity of pancreatic lipase and inhibition of cholesterol absorption. The current review will highlight the hypolipidemic effects of medicinal plants as promising effective and safe therapies.

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FROLOV, A. E., e O. N. KOTKOVA. "EFFECT OF TREATMENT PLANTS ON ENVIRONMENTAL SAFETY". Urban construction and architecture 3, n.º 4 (15 de dezembro de 2013): 68–74. http://dx.doi.org/10.17673/vestnik.2013.04.12.

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Water treatment and returning the treated water into the production is very important for refining and petrochemical industries. The technical condition of wastewater and water treatment with characteristic lesions of structural elements significantly aﬀect the ecology of the environment and the plant area with flooding possible contamination of groundwater. These issues are discussed based on a survey of individual objects petrochemicals.

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Hochma, Efrat, Ludmila Yarmolinsky, Boris Khalfin, Marina Nisnevitch, Shimon Ben-Shabat e Faina Nakonechny. "Antimicrobial Effect of Phytochemicals from Edible Plants". Processes 9, n.º 11 (22 de novembro de 2021): 2089. http://dx.doi.org/10.3390/pr9112089.

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Current strategies of combating bacterial infections are limited and involve the use of antibiotics and preservatives. Each of these agents has generally inadequate efficacy and a number of serious adverse effects. Thus, there is an urgent need for new antimicrobial drugs and food preservatives with higher efficacy and lower toxicity. Edible plants have been used in medicine since ancient times and are well known for their successful antimicrobial activity. Often photosensitizers are present in many edible plants; they could be a promising source for a new generation of drugs and food preservatives. The use of photodynamic therapy allows enhancement of antimicrobial properties in plant photosensitizers. The purpose of this review is to present the verified data on the antimicrobial activities of photodynamic phytochemicals in edible species of the world’s flora, including the various mechanisms of their actions.

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Podlipná, Radka. "Benzimidazoles and Plants: Uptake, Transformation and Effect". Toxics 10, n.º 3 (11 de março de 2022): 135. http://dx.doi.org/10.3390/toxics10030135.

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In recent years, there has been increasing concern over the environmental risks of the so called “Emerging pollutants (EPs)” that are defined as synthetic or naturally occurring chemicals that are not commonly monitored in the environment but which have the potential to enter the environment and cause adverse ecological and (or) human health effects [...]

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Andrade-Cetto, Adolfo, Fernanda Espinoza-Hernández, Gerardo Mata-Torres e Sonia Escandón-Rivera. "Hypoglycemic Effect of Two Mexican Medicinal Plants". Plants 10, n.º 10 (29 de setembro de 2021): 2060. http://dx.doi.org/10.3390/plants10102060.

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Type 2 diabetes is a worldwide prevalent disease that is due to a progressive loss of adequate β-cell insulin secretion, frequently against a background of insulin resistance. In Mexican traditional medicine, the therapeutic use of hypoglycemic plants to control the disease is a common practice among type 2 diabetic patients. In the present work, we examined the traditional use of the aerial parts of Eryngium longifolium and the rhizome of Alsophila firma, consumed by people use over the day (in fasting state) to control their blood glucose levels, therefore, we aimed to assess the acute hypoglycemic effect of both plants. First, basic phytochemical profiles of both plants were determined and, subsequently, acute toxicity tests were carried out. Then, in vivo hypoglycemic tests were performed in streptozotocin-nicotinamide (STZ-NA) induced hyperglycemic Wistar rats and finally the effect of the plants on three enzymes involved in glucose metabolism was assayed in vitro. Through HPLC-DAD chromatography, caffeic acid, chlorogenic acid, rosmarinic acid, isoflavones, and glycosylated flavonoids were identified in E. longifolium, while the possible presence of flavanones or dihydroflavonols was reported in A. firma. Both plants exhibited a statistically significant hypoglycemic effect, without a dose-dependent effect. Furthermore, they inhibited glucose 6-phosphatase and fructose 1,6-bisphosphatase in in vitro assays, which could be associated with the hypoglycemic effect in vivo. Thus, this study confirmed for the first time the traditional use of the aerial part of E. longifolium and the rhizome of A. firma as hypoglycemic agents in a hyperglycemic animal model. In addition, it was concluded that their ability to regulate hyperglycemia could involve the inhibition of hepatic glucose output, which mainly controls glucose levels in the fasting state.

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Hassan, R. A., S. T. AboTaleb, M. I. Sanad e Sahar E. Hamed. "ANTIDIABETIC EFFECT OF SOME MEDICINAL PLANTS EXTRACTS". Journal of Agricultural Chemistry and Biotechnology 4, n.º 6 (1 de junho de 2013): 229–37. http://dx.doi.org/10.21608/jacb.2013.53202.

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Atabayeva, S. D. "THE PECULIARITIES OF CADMIUM EFFECT ON PLANTS". Eurasian Journal of Ecology 1, n.º 50 (2017): 27–35. http://dx.doi.org/10.26577/eje-2017-1-750.

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Al-Mutaz, Ibrahim S. "Features of multi-effect evaporation desalination plants". Desalination and Water Treatment 54, n.º 12 (22 de abril de 2014): 3227–35. http://dx.doi.org/10.1080/19443994.2014.910842.

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Pant, Manu, e Himanshu Badoni. "Effect of mobile phone radiations on plants". Agrochimica, n.º 1 (2020): 15–26. http://dx.doi.org/10.12871/00021857202012.

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Trites, Lary F., e R. G. S. Bidwell. "Effect of acidic precipitation on bean plants". Canadian Journal of Botany 65, n.º 6 (1 de junho de 1987): 1121–26. http://dx.doi.org/10.1139/b87-156.

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Direct and indirect effects of acidic precipitation on the rates of CO2 exchange of bean plants (Phaseolus vulgaris L., cv. Tendergreen) were measured. Solutions of HCl, HNO3, H2SO4, and artificial acid rain at pH values from 2.7 to 5.0 sprayed on leaves at intervals (varying from 1 to 5 days in different experiments) for 3 weeks had no effect on rates of CO2 exchange. Some lesions appeared on leaves where chlorophyll was destroyed; apparently undamaged areas of the leaf compensated by increasing the rate of photosynthesis. Application of acidic solutions to pot soil in which the plants were growing or growing plants in nutrient solutions at pH 3.0 caused serious effects in the leaves, resembling Ca or Mg deficiency symptoms, but no obvious deleterious effects to the roots. Effects of acid were greater when Ca, Mg, P, or N were supplied at reduced concentration. Reducing the concentration of K, Fe, or the mixture of trace elements normally supplied did not influence the effect of acidity of the nutrient solution. The uptake and distribution of Ca, Mg, P, and N throughout the plant was not affected by the acid treatments. It is concluded that acidic soil water or nutrient solutions interfere with the metabolism of calcium, magnesium, phosphorus, and nitrogen in the leaves.

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Stumpf, P. K. "Transgenic Plants: Effect on the Third World". Science 268, n.º 5219 (30 de junho de 1995): 1830–31. http://dx.doi.org/10.1126/science.268.5219.1830.

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Morita, S., M. Ito, Y. Fujii e J. Harada. "Plant growth inhibiting effect in arbor plants". Journal of Weed Science and Technology 46, Supplement (2001): 134–35. http://dx.doi.org/10.3719/weed.46.supplement_134.

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MU, Rasheed, e Thajuddin N. "Effect of medicinal plants on Moraxella cattarhalis". Asian Pacific Journal of Tropical Medicine 4, n.º 2 (fevereiro de 2011): 133–36. http://dx.doi.org/10.1016/s1995-7645(11)60053-9.

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Roman-Ramos, R., J. L. Flores-Saenz e F. J. Alarcon-Aguilar. "Anti-hyperglycemic effect of some edible plants". Journal of Ethnopharmacology 48, n.º 1 (agosto de 1995): 25–32. http://dx.doi.org/10.1016/0378-8741(95)01279-m.

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Perez G., R. M., M. A. Zavala S., S. Perez G. e C. Perez G. "Antidiabetic effect of compounds isolated from plants". Phytomedicine 5, n.º 1 (março de 1998): 55–75. http://dx.doi.org/10.1016/s0944-7113(98)80060-3.

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Tkachuk, Z. Yu, T. G. Yakovenko, A. N. Kalenchuk e B. S. Muzychenko. "Mutagenic effect of oligonucleotides on maize plants". Biopolymers and Cell 9, n.º 6 (20 de novembro de 1993): 78–85. http://dx.doi.org/10.7124/bc.000387.

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Budovsky, Arie, Ludmila Yarmolinsky e Shimon Ben-Shabat. "Effect of medicinal plants on wound healing". Wound Repair and Regeneration 23, n.º 2 (março de 2015): 171–83. http://dx.doi.org/10.1111/wrr.12274.

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Druetta, Paula, Pio Aguirre e Sergio Mussati. "Optimization of Multi-Effect Evaporation desalination plants". Desalination 311 (fevereiro de 2013): 1–15. http://dx.doi.org/10.1016/j.desal.2012.10.033.

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