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Artículos de revistas sobre el tema "Chelate effect"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 12 de febrero de 2022

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1

Razanov, S., S. Tkachyk, and A. Razanova. "The intensity of heavy metals accumulation by the milk thistle leaf mass under its fertilization with the latest fertilizers." Agrobìologìâ, no. 2(161) (November 24, 2020): 160–67. http://dx.doi.org/10.33245/2310-9270-2020-161-2-160-167.

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The aim of the research is to study the intensity of heavy metals accumulation in milk thistle leaf mass under fertilization with the latest types of fertilizers and to assess the environmental safety of such raw materials. Two experiments were laid in the research: the effect of fertilizing milk thistle with organo-mineral fertilizer Growth-concentrate on the intensity heavy metals accumulation by its leaf mass; the effect of fertilizing milk thistle with chelated fertilizers Phosphorus-chelate and Potassium-chelate on the intensity on heavy metals accumulation by the leaf mass. The use of a

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2

Sengupta, Arkajyoti, Anthony Seitz, and Kenneth M. Merz. "Simulating the Chelate Effect." Journal of the American Chemical Society 140, no. 45 (2018): 15166–69. http://dx.doi.org/10.1021/jacs.8b09371.

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3

Major, Ryan C., and X. Y. Zhu. "The Surface Chelate Effect." Journal of the American Chemical Society 125, no. 28 (2003): 8454–55. http://dx.doi.org/10.1021/ja035544q.

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4

Lester, Gene E., and Michael A. Grusak. "Postharvest Application of Calcium and Magnesium to Honeydew and Netted Muskmelons: Effects on Tissue Ion Concentrations, Quality, and Senescence." Journal of the American Society for Horticultural Science 124, no. 5 (1999): 545–52. http://dx.doi.org/10.21273/jashs.124.5.545.

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Muskmelon senescence is directly associated with a decline in hypodermal mesocarp membrane integrity and its Ca concentration, but infusing Ca into melons has been a problem. Fully ripened and abscised hybrid honeydew [Cucumis melo L. (Inodorus Group) `Honey Brew'] and netted muskmelon [Cucumis melo L. (Reticulatus Group) `Explorer'] fruit were submerged (dipped) 20 min at 25 ± 3 °C in a solution containing a Ca-chelate, a Mg-chelate, a combination of both chelates, or no mineral chelate. Following 10 or 24 days of cold storage (4 °C for `Explorer' and 10 C for `Honey Brew'), fruit were analyz

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5

Albano, Joseph P., and William B. Miller. "Photodegradation of FeDTPA in Nutrient Solutions. I. Effects of Irradiance, Wavelength, and Temperature." HortScience 36, no. 2 (2001): 313–16. http://dx.doi.org/10.21273/hortsci.36.2.313.

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Irradiation of FeDTPA-containing nutrient solutions by a fluorescent plus incandescent light source resulted in the loss of both Fe-chelate and soluble Fe, the formation of a precipitate that was composed mostly of Fe, and a rise in pH. The rate of Fe-chelate photodegradation in solution increased with irradiance intensity and with solution temperature under irradiation, but irradiance had the greater effect. Fe-chelates absorb in the blue and UV regions of the spectrum. Removal of these wavelengths with a spectral filter eliminated photodegradation. Chemical name used: ferric diethylenetriami

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6

MODAIHSH, A. S. "FOLIAR APPLICATION OF CHELATED AND NON-CHELATED METALS FOR SUPPLYING MICRONUTRIENTS TO WHEAT GROWN ON CALCAREOUS SOIL." Experimental Agriculture 33, no. 2 (1997): 237–45. http://dx.doi.org/10.1017/s001447979700001x.

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A field experiment was conducted from 1992 to 1994 to study the effect of supplying micronutrients to wheat (Triticum aestivum L., cv. Yecora rojo) grown on calcareous soil. Chelated and/or non-chelated forms of Fe, Mn, Zn and Cu were administered through a wide range of foliar applications, sprayed either individually or in combination. All the chelated micronutrients were applied in the form of EDTA with the exception of Fe (EDDHA). However, all the non-chelated elements were in the form of sulphate. The grain yield was significantly increased by the application of individual micronutrients

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7

GOMAN, N. V., I. A. BOBRENKO, V. V. POPOVA, and A. A. GAIDAR. "AGROCHEMICAL REGULATORY INDICATORS OF MINERAL NUTRITION OF SPRING WHEAT IN THE FOREST STEPPE OF WESTERN SIBERIA." Izvestiâ Timirâzevskoj selʹskohozâjstvennoj akademii, no. 1 (2021): 5–17. http://dx.doi.org/10.26897/0021-342x-2021-1-5-17.

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The authors studied the influence of different methods of using micronutrient fertilizers on the yield of spring wheat grain and established standard agrochemical indicators of mineral nutrition on the grassland-chernozem soil of the Omsk region. Use was made of helated micronutrient fertilizers (zinc and copper). Chelated micronutrient fertilizers are an organic complex of a microelement with a chelating agent, in which the microelement is freely absorbed by the plant. The advantages of chelated micronutrient fertilizers are an increase in the availability of trace elements, because these com

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8

Farnia, Amin, and Saeed Khodabandehloo. "Changes in Yield and its Components of Maize (Zea mays L.) to Foliar Application of Zinc Nutrient and Mycorrhiza under Water Stress Condition." International Journal of Life Sciences 9, no. 5 (2015): 75–80. http://dx.doi.org/10.3126/ijls.v9i5.12702.

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A field experiment was carried out in order to evaluate the effect of mycorrhiza and foliar application of Zn chelate on yield and yield components of maize (zea mays L.) SC600 cultivar under water stress condition in the faculty of agronomy and plant breeding, Islamic Azad University, Boroujerd Branch, Iran during the growing seasons 2013-2014. The experiment was laid out in a split-factorial design based on randomized block design with three replications. Treatments were different irrigation periods (7, 14 and 21 days) in main plots and Zn chelate and mycorrhiza (strain of Glomus intraradice

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9

Li, Min, and Paul R. Selvin. "Luminescent Polyaminocarboxylate Chelates of Terbium and Europium: The Effect of Chelate Structure." Journal of the American Chemical Society 117, no. 31 (1995): 8132–38. http://dx.doi.org/10.1021/ja00136a010.

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10

H. Mahdi, Hasan, Lamiaa A. Mutlag, and Raghad S. Mouhamad. "Study the effect of khazra iron nano chelate fertilizer foliar application on two rapeseed varieties." Bionatura 4, no. 2 (2019): 841–45. http://dx.doi.org/10.21931/rb/2019.04.02.4.

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An experiment was conducted in Al-zafraniya station / Baghdad – Iraq, during the winter season 2017 - 2018 in order to study the effect of khazra iron nano chelate fertilizer foliar application on two rapeseed varieties for increasing yield and yield components. The experiment designed by randomized complete blocks design (RCBD) for three replicates. The first factor included two rapeseed varieties (Brassica napus var. oleifera and Brassica napus L. var. pactol) and second factor included khazra iron nano chelated in three levels 0, 5 (kg.ha-1) (0.5 kg nano iron fertilizers per 1000-liter wate

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11

Šrámek, F., and M. Dubský. "Occurrence and correction of lime-induced chlorosis in petunia plants." Plant, Soil and Environment 57, No. 4 (2011): 180–85. http://dx.doi.org/10.17221/426/2010-pse.

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The effect of various concentrations and ratios of iron (Fe) and manganese (Mn) chelates on growth, micronutrient uptake and chlorophyll content was investigated in a glasshouse experiment using potted petunia plants. The plants were cultivated in a peat substrate amended with dolomitic limestone at rate of 3.0 g/L (control substrate) or 12.0 g/L. The higher rate was established both to restrict the uptake of Fe, Mn and other nutrients and also to test the effectiveness of various Fe and Mn treatments. The plants in all the treatments were fertigated at weekly intervals with a nutrient solutio

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12

Lomozová, Zuzana, Václav Tvrdý, Marcel Hrubša, et al. "Dehydroflavonolignans from Silymarin Potentiate Transition Metal Toxicity In Vitro but Are Protective for Isolated Erythrocytes Ex Vivo." Antioxidants 10, no. 5 (2021): 679. http://dx.doi.org/10.3390/antiox10050679.

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2,3-Dehydrosilybin (DHS) was previously shown to chelate and reduce both copper and iron ions. In this study, similar experiments with 2,3-dehydrosilychristin (DHSCH) showed that this congener of DHS also chelates and reduces both metals. Statistical analysis pointed to some differences between both compounds: in general, DHS appeared to be a more potent iron and copper chelator, and a copper reducing agent under acidic conditions, while DHSCH was a more potent copper reducing agent under neutral conditions. In the next step, both DHS and DHSCH were tested for metal-based Fenton chemistry in v

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13

Klem-Marciniak, Ewelina, Marta Huculak-Mączka, Kinga Marecka, Krystyna Hoffmann, and Józef Hoffmann. "Chemical Stability of the Fertilizer Chelates Fe-EDDHA and Fe-EDDHSA over Time." Molecules 26, no. 7 (2021): 1933. http://dx.doi.org/10.3390/molecules26071933.

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In application conditions, the influence of environmental parameters on used fertilizer chelates and their distribution over time is important. For this purpose, the changes in the content of micronutrient ions and Fe-EDDHA and Fe-EDDHSA chelates in an aqueous medium at different pH values were studied. In the assumed time, changes in the ions content were analyzed using the voltammetry method at pH 3, 5 and 7. The content of isomers and chelate forms was analyzed by ion pair chromatography at pH 3, 5 and 7. These studies allowed us to determine the effect of pH on the stability of iron chelat

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14

Bowman, Donald C. "A Colorful Look at the Chelate Effect." Journal of Chemical Education 83, no. 8 (2006): 1158. http://dx.doi.org/10.1021/ed083p1158.

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15

Davydova, E. I., T. N. Sevastianova, A. Y. Timoshkin, A. V. Suvorov, and G. Frenking. "Chelate effect: The importance of reorganization energy." International Journal of Quantum Chemistry 100, no. 4 (2004): 419–25. http://dx.doi.org/10.1002/qua.20094.

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16

Heidari, M., I. Salmanpour, H. Ghorbani, and H. R. Asghari. "Iron Chelate and Rhizobactria Changed Growth, Grain Yield, and Physiological Characteristics in Maize." Scientia Agriculturae Bohemica 49, no. 4 (2018): 245–54. http://dx.doi.org/10.2478/sab-2018-0031.

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Abstract In order to investigate the effect of iron chelate and plant growth promoting rhizobacteria (PGPR) on maize, an experiment was conducted as completely randomized block factorial design with three replicates. The first factor included of bacterial strain: S1= Control (without use of bacteria), S2=Azotobacter chroococcum and S3= Azospirillum brasilens and the second factor included of iron chelate: F1= Control, F2= soil application of Fe chelate, F3= foliar application of Fe chelate, F4= soil application of nano Fe chelate and F5= foliar application of nano Fe chelate. The results showe

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17

Neocleous, Damianos, Georgios Nikolaou, Georgia Ntatsi, and Dimitrios Savvas. "Impact of Chelated or Inorganic Manganese and Zinc Applications in Closed Hydroponic Bean Crops on Growth, Yield, Photosynthesis, and Nutrient Uptake." Agronomy 10, no. 6 (2020): 881. http://dx.doi.org/10.3390/agronomy10060881.

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In this study, we investigated the effect of individual and combined applications of manganese (Mn) and zinc (Zn) chelates on common bean grown in hydroponics (nutrient film technique—NFT) on physiological and agronomical responses. Inorganic sulphate forms of Mn and Zn were compared to their synthetic chelate forms, in the replenishment nutrient solution (RNS). Nutrient (N, P, K, Ca, Mg, Fe, Mn, Zn and Cu) to water uptake ratios (termed uptake concentrations; UCs), growth, pods yield and quality, photosynthetic parameters and tissue nutrient status were evaluated in different cropping seasons

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18

Strnadová, Petra, Vlasta Svobodová, Leoš Pavlata, Ľubica Mišurová, and Rudolf Dvořák. "Effect of inorganic and organic zinc supplementation on coccidial infections in goat kids." Acta Veterinaria Brno 80, no. 2 (2011): 131–37. http://dx.doi.org/10.2754/avb201180020131.

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The aim of this study was to identify the effect of zinc-enriched diet fed to goats and their kids on the number of Coccidia oocysts shed by kids, on clinical signs of coccidiosis, weight gains, and kids’ blood plasma concentration of zinc. A total of 22 goat kids were divided into 4 groups of 5 or 6 animals. Goats and kids from the control group did not receive any additional zinc, the second group was supplemented with inorganic zinc (zinc oxide), the third group was given zinc lactate, and the fourth group received chelated zinc. Samples of kids’ faeces were taken weekly from 3 to 9 weeks o

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19

Olakanmi, Oyebode, Larry S. Schlesinger, Ambar Ahmed, and Bradley E. Britigan. "The Nature of Extracellular Iron Influences Iron Acquisition by Mycobacterium tuberculosis Residing within Human Macrophages." Infection and Immunity 72, no. 4 (2004): 2022–28. http://dx.doi.org/10.1128/iai.72.4.2022-2028.2004.

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ABSTRACT We have reported that Mycobacterium tuberculosis residing within the phagosomes of human monocyte-derived macrophages (MDM) can acquire Fe from extracellular transferrin (TF) and sources within the MDM. In the lung, Fe is also bound to lactoferrin (LF) and low-molecular-weight chelates. We therefore investigated the ability of intraphagosomal M. tuberculosis to acquire Fe from these sources. M. tuberculosis acquired 30-fold and 3-fold more Fe from LF and citrate, respectively, compared to TF, in spite of similar MDM-associated Fe. M. tuberculosis infection decreased MDM-associated Fe

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20

Tsuchida, Eishun, and Hiroyuki Nishide. "Polymer effect in the chelate formation of macromolecules." Die Makromolekulare Chemie 14, S19851 (1985): 71–80. http://dx.doi.org/10.1002/macp.1985.020141985107.

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21

Breslow, Ronald, Sandro Belvedere, Leland Gershell, and David Leung. "The chelate effect in binding, catalysis, and chemotherapy." Pure and Applied Chemistry 72, no. 3 (2000): 333–42. http://dx.doi.org/10.1351/pac200072030333.

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Cyclodextrin (CD) dimers bind amino acid side chains, and such binding can dissociate aggregated proteins, including citrate synthase (dimer) and lactic dehydrogenase (tetramer). A CD dimer can bind a hydrophobic photosensitizer that, upon irradiation, generates singlet oxygen. This cleaves the dimer and releases the photosensitizer. CD dimers in a cytochrome P-450 mimic steer catalyzed hydroxylation to a bound steroid with geometric control. Chelate binding has also led to a group of cytodifferentiating agents whose mechanism has been recently established. They have promising anticancer prope

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22

Breslow, Ronald. "The chelate effect in binding, catalysis, and chemotherapy." Recueil des Travaux Chimiques des Pays-Bas 113, no. 11 (1994): 493–98. http://dx.doi.org/10.1002/recl.19941131102.

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23

Bashir, Safdar, Abdul Basit, Rana Nadeem Abbas, et al. "Combined application of zinc-lysine chelate and zinc-solubilizing bacteria improves yield and grain biofortification of maize (Zea mays L.)." PLOS ONE 16, no. 7 (2021): e0254647. http://dx.doi.org/10.1371/journal.pone.0254647.

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Malnutrition a health disorders arising due to over or low use of minerals, vitamins and nutritional substances required for proper functioning of body tissues and organs. Zinc (Zn) is the most important mineral required for the normal metabolism of plants and humans. Zinc-deficiency is one of the major cause of malnutrition globally. Maize is highly susceptible to Zn-deficiency and inflicts Zn-deficiency to humans and other animals being nourished on it. This study evaluated the effect of zinc-lysine chelate alone (0.1, 0.5, 1.0 and 1.5%) as seed priming and in combination with Zn-solubilizin

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24

Kwiecień, Małgorzata, Anna Winiarska-Mieczan, Kazimierz Zawiślak, and Szymon Sroka. "Effect of copper glycinate chelate on biomechanical, morphometric and chemical properties of chicken femur." Annals of Animal Science 14, no. 1 (2014): 127–39. http://dx.doi.org/10.2478/aoas-2013-0085.

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AbstractThe effect of Cu in the form of glycinate chelate, added to chicken feed mixtures, on biomechanical, morphometric and chemical parameters of chicken femur bones was evaluated at 6 weeks of age. Three hundred one-day-old Ross 308 male chicks were divided into 6 groups each in 5 repetitions of 10 chicks. The basal feed mixtures contained: starter 6.1 mg·kg-1 Cu, grower 6.21 mg·kg-1 Cu, finisher 5.91 mg·kg-1 Cu. In the experiment 8, 4 or 2 mg·kg-1 of copper were added to the premix (containing no Cu) in the form of copper sulfate (S-Cu) or as copper glycinate chelate (Gly-Cu). The highest

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25

Santos, Jose Reynaldo A., and Frank J. Dainello. "NUTRIPRIMING: A METHOD TO IMPROVE GERMINATION PERFORMANCE OF OLD SPINACH SEEDS." HortScience 25, no. 9 (1990): 1156a—1156. http://dx.doi.org/10.21273/hortsci.25.9.1156a.

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One-year old `Coho' spinach seeds (Spinacea oleracea L.) were primed, air-dried, and germinated for 12 days to determine the effects of multi nutrient liquid chelate compound (Crop-Up) and its single nutrient chelate components on the germination performance of old seeds. Treatments consisted of Crop-Up, Ca, Mg, Mn, Fe, Zn, Cu, and B chelate solutions at concentrations of 5, 0.25, 0.11, 0.28, 0.25, 0.34, 0.10, and 0.05%, respectively. Distilled water was used for the check. Crop-Up-, Fe-, Zn-, and Cu-priming significantly increased both seedling fresh and dry weights, and improved seed germina

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26

Thomidis, T., C. Tsipouridis, Z. Michailides, and E. Exadaktylou. "Effect of zinc on the leaf mineral content, yield, fruit weight and susceptibility of peaches to Monilinia laxa." Australian Journal of Experimental Agriculture 46, no. 9 (2006): 1203. http://dx.doi.org/10.1071/ea04237.

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The effect of zinc sulfate and zinc chelate on the leaf mineral content, yield and fruit weight of the peach variety Andross was investigated in a Greek orchard. Foliar application of a 25% zinc sulfate solution on 25 February and 2% zinc chelate solution on 20 May increased the zinc content of leaves and no toxicity was observed. In contrast, foliar application of 6% zinc sulfate and soil application of zinc sulfate at a rate of 200 g/tree on 25 February did not affect the zinc content of leaves. However, zinc sulfate applied to the soil at a rate of 200 g/tree significantly increased fruit y

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27

Neale, Zachary G., Chaofeng Liu, and Guozhong Cao. "Effect of synthesis pH and EDTA on iron hexacyanoferrate for sodium-ion batteries." Sustainable Energy & Fuels 4, no. 6 (2020): 2884–91. http://dx.doi.org/10.1039/d0se00120a.

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28

Алейникова, Наталья Васильевна, Нина Владимировна Цирульникова, Павел Александрович Диденко, Елена Аркадьевна Никулина, and Светлана Валентиновна Левченко. "Prospects of treatment grapes in Crimea with locally produced chelate microfertilizers." Magarach Vinogradstvo i Vinodelie, no. 3(113) (September 21, 2020): 216–20. http://dx.doi.org/10.35547/im.2020.22.3.006.

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В статье представлены результаты исследований 2018-2019 гг., проведенных в почвенно-климатических условиях Южнобережной зоны виноградарства Крыма по изучению влияния внекорневых подкормок хелатными микроудобрениями Хелат В и Хелатон Экстра на винограде ценного технического сорта Каберне-Совиньон. В ходе исследований не выявлено изменений в продолжительности и сроках наступления фенологических фаз развития винограда на фоне применения изучаемых микроудобрений. Показано положительное влияние данных препаратов на вегетативное и генеративное развитие, количественные и качественные показатели урожа

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29

Hu, Xiao-bo, Yi Gong, Lei Li, Shao-ping Nie, Yuan-xing Wang, and Ming-yong Xie. "Safety Evaluation of Zinc Threoninate Chelate." International Journal of Toxicology 29, no. 4 (2010): 372–79. http://dx.doi.org/10.1177/1091581810367438.

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The acute toxicity of zinc threoninate chelate was assessed. The oral lethal dose 50% (LD50) was 2710 mg/kg in female rats and 3160 mg/kg in male rats. Genotoxicity was assessed by Ames test in Salmonella typhimurium strains TA97, TA98, TA100, and TA102, by bone marrow mouse micronucleus test and a sperm abnormality test with mice. Thirty-day repeat dose toxicity study was conducted at oral daily doses of 0, 42, 169, and 675 mg/kg in rats. Teratogenicity was assessed at the same daily dose in pregnant rats by gavage. No significant changes in body weight, food consumption, organ weight, relati

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30

Machado, Francisca Ligia de Castro, Ricardo Elesbão Alves, and Raimundo Wilane Figueiredo. "Application of 1-methylcyclopropene, calcium chloride and calcium amino acid chelate on fresh-cut cantaloupe muskmelon." Pesquisa Agropecuária Brasileira 43, no. 5 (2008): 569–74. http://dx.doi.org/10.1590/s0100-204x2008000500003.

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The objective of this work was to determine the effects of postharvest application of 1-methylcyclopropene (1-MCP) and two calcium salts, applied individually or combined, on firmness and visual quality of fresh-cut muskmelon stored in air, for 18 days. Two sets of fruits, one of them exposed to 1-MCP at 300 nL L-1, were cut into cubes, dipped in deionized water, or in 1% Ca solutions as CaCl2, or in calcium amino acid chelate (Ca-chelate), placed in clamshell containers, and stored in air at 5±1ºC and 90±5% RH, for 18 days. The assay was conducted using an entirely randomized design, with thr

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31

Zhang, Biliang, and Ronald Breslow. "Enthalpic domination of the chelate effect in cyclodextrin dimers." Journal of the American Chemical Society 115, no. 20 (1993): 9353–54. http://dx.doi.org/10.1021/ja00073a087.

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32

Abdossi, V., and M. Kazemi. "Effect of nano-iron chelate on chemical composition and antimicrobial properties of Carum copticum L. essential oil and its main Terpenes from Iran." Bangladesh Journal of Botany 44, no. 4 (2018): 537–42. http://dx.doi.org/10.3329/bjb.v44i4.38567.

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The effect of exogenous application of nano-iron chelate (100 and 200 mg/l) in early flowering stage on components of essential oils (EOs) of Carum copticum was evaluated. The EO extracted by hydrodistillation from Iranian C. copticum was characterized by means of GC/MS. The nano-iron chelate application increased γ- terpinene and thymol and decreased α-pinene, β-pinene and p-cymene concentration. The oil was also subjected to antimicrobial activity. C. copticum oil was found to inhibit Bacillus cereus and Candida albicans with the lowest MIC and MBC/MFC values. Thymol and carvacrol possessed

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33

Chen, Xingyu, Fangfang Chen, and Maria Forsyth. "Molecular dynamics study of the effect of tetraglyme plasticizer on dual-cation ionomer electrolytes." Physical Chemistry Chemical Physics 19, no. 25 (2017): 16426–32. http://dx.doi.org/10.1039/c7cp02129a.

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34

Bedford, Robin B., Peter B. Brenner, David Elorriaga, Jeremy N. Harvey, and Joshua Nunn. "The influence of the ligand chelate effect on iron-amine-catalysed Kumada cross-coupling." Dalton Transactions 45, no. 40 (2016): 15811–17. http://dx.doi.org/10.1039/c6dt01823h.

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35

Fouegue Tamafo, Aymard Didier, Julius Numbonui Ghogomu, Nyiang Kennet Nkungli, Désiré Bikélé Mama, and Elie Younang. "Quantum Chemical Investigation on the Antioxidant Activity of Neutral and Anionic Forms of Juglone: Metal Chelation and Its Effect on Radical Scavenging Activity." Journal of Chemistry 2017 (2017): 1–14. http://dx.doi.org/10.1155/2017/3281684.

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The chelation ability of divalent Mg, Ca, Fe, Co, Ni, Cu, Zn, and monovalent Cu ions by neutral and anionic forms of juglone has been investigated at DFT/B3LYP/6-31+G(d,p) level of theory in gas and aqueous phases. It is noteworthy that only the 1 : 1 stoichiometry was considered herein. The effects of these metals on the radical scavenging activity of neutral juglone were evaluated via the usual descriptors of hydrogen atom transfer. According to our results, metal chelation by the two forms of juglone was spontaneous and exothermic in both media. Based on the binding energies, Cu(II) ion sho

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36

El Bouchti, Mehdi, Hassan Hannache, Said Gmouh, Naima Hanafi, and Omar Cherkaoui. "Antibacterial Properties of Functional Polyamide 6.6." Autex Research Journal 14, no. 2 (2014): 73–75. http://dx.doi.org/10.2478/aut-2014-0002.

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Abstract Polyamide 6.6 multifilaments are grafted with the monomer N-allyliminodiacetic acid for the purpose of removal of some heavy metal ions from their aqueous solutions by forming its metal chelate especially with Ag+ ion. Such a fibrous chelate-forming resin has been used with success due to its large surface area, which contains an important metal chelate-forming functional group, where metal ions are adsorbed or desorbed on its surface, and therefore having an improved adsorption and desorption capability. In previous work, chelate-forming fibre was characterised by ICP-AES analysis ac

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37

Alikhani, Tahereh Tofighi, Seyed Jalal Tabatabaei, Ali Mohammadi Torkashvand, and Daryush Talei. "Silica nanoparticles and calcium on the histological characteristics and stem bending in gerbera cut flower." Ornamental Horticulture 27, no. 3 (2021): 334–43. http://dx.doi.org/10.1590/2447-536x.v27i3.2308.

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Abstract Silica nanoparticles and calcium are necessary for improving plant yield and decreasing stem bending in gerbera flower (Gerbera Jamesonii L.). In order to determine the optimal concentrations of silica nanoparticles and calcium in gerberas (Gerbera Jamesonii L.), a factorial experiment in the form of completely randomized design with two factors was conducted. The first factor was the concentration of silica nanoparticles (Nanoparticle-SiO2) at four rates (0, 20, 40, and 80 mg L-1) and the second factor was the concentration of calcium chelate (Ca-Chelate) at four rates (0, 60, 120, a

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38

Jursík, František, and Jana Ondráčková. "Cooperative effect of NH bond orientation and triamine six-membered chelate ring rigidity in stereospecific formation of exo-((1,6-diamine-3-azahexane)-(S)-aspartato)cobalt(III) isomers." Collection of Czechoslovak Chemical Communications 53, no. 11 (1988): 2654–63. http://dx.doi.org/10.1135/cccc19882654.

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Of the six isomers possible, only exo-sym-fac(S), exo-unsym1-fac(S) and exo-Δ-unsym2-fac(R)-[Co(1,6-dah)(S)-Asp]+ (1,6-dah = 1,6-diamine-3-azahexane) isomers were prepared and characterized by electronic absorption and circular dichroism spectra. Isomers formation is stereospecific due to the linear triamine NH bond orientation which causes that of the three sites in mer(R or S)-[Co(1,6-dah)(H2O)3]3+ intermediates, only two are available for initial coordination of aspartic acid as bidentate ligand. In addition to this, 1,6-dah six-membered chelate ring precludes the necessary movement of the

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39

Gonzalez, Demetrio, Patricia Almendros, and Jose M. Alvarez. "Effects of synthetic Zn chelates on flax response and soil Zn status." Spanish Journal of Agricultural Research 14, no. 3 (2016): e1104. http://dx.doi.org/10.5424/sjar/2016143-8765.

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Throughout the world, flax (Linum usitatissimum L.) is often grown in Zn-deficient soils, but appropriate fertilizer management can optimize both crop yield and micronutrient content. A greenhouse experiment was conducted on Typic Haploxeralf (pH 6.1) and Typic Calcixerept (pH 8.1) soils to study the relative efficiency of chelated Zn using two application rates of three different Zn sources [Zn-EDDHSA, ethylenediamine-di-(2-hydroxy-5-sulfophenylacetate of Zn); Zn-HEDTA, N-2-hydroxyethyl-ethylenediaminetriacetate of Zn; and Zn-EDTA, ethylenediaminetetraacetate of Zn]. Dry matter /DM) yield, Zn

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40

Youngme, Sujittra, Pongthipun Phuengphai, Chaveng Pakawatchai, Palangpon Kongsaeree, and Narongsak Chaichit. "Five-coordinate copper(II) complexes: crystal structures, spectroscopic properties and new extended structural pathways of [Cu(chelate)2 X]Y, where chelate = dpyam, phen and bipy; X = pseudohalide ligands." Acta Crystallographica Section B Structural Science 64, no. 3 (2008): 318–29. http://dx.doi.org/10.1107/s0108768108004151.

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The crystal structures of four distortion isomers of the [Cu(chelate)2 X]+ cation, where chelate = 2,2-bipyridine (bipy), 1,10-phenanthroline (phen) and di-2-pyridylamine (dpyam), X = a pseudohalide ligand (NCO, NCS, N3 and C2N3), have been compared by scatterplot analysis with 25 [Cu(chelate)2 X]Y complexes of known crystal structure. The four new complexes [Cu(phen)2NCO]Br (1), [Cu(phen)2N3]BPh4·H2O (2), [Cu(dpyam)2(N3)]NO3·H2O (3) and [Cu(dpyam)2(N3)]ClO4 (4) involve a near regular square-based pyramidal stereochemistry (RSBP). The structures of complexes (1) and (2) are of the rare cases f

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41

Patyka, V., H. Huliaieva, I. Tokovenko, V. Maksin, and V. Kaplunenko. "Physiological effect of citrate chelate nanoparticles on plants of wheat." Agricultural Science and Practice 4, no. 2 (2017): 28–36. http://dx.doi.org/10.15407/agrisp4.02.028.

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Aim. Complex study on the physiological effect of citrate chelate nanoparticles of silver and copper on spring wheat plants under presowing soaking of seeds and foliar treatment of plants. Methods. Physiological, biochemical, bio- physical, microbiological, statistical. Results. The data on the physiological effect of the presowing soaking of seeds in the solutions of citrate chelate nanoparticles of silver and copper on growth processes and photochemical activity of leaves in laboratory conditions have been studied, analyzed, and summarized along with the effect of foliar treatment of spring

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42

Ben-David, Y., M. Portnoy, M. Gozin, and D. Milstein. "Palladium-catalyzed vinylation of aryl chlorides. Chelate effect in catalysis." Organometallics 11, no. 6 (1992): 1995–96. http://dx.doi.org/10.1021/om00042a008.

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Lisensky, G. C., R. L. Penn, C. J. Murphy, and A. B. Ellis. "Electro-Optical Evidence for the Chelate Effect at Semiconductor Surfaces." Science 248, no. 4957 (1990): 840–43. http://dx.doi.org/10.1126/science.248.4957.840.

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Castillo, B., D. L. Madhavi, and M. A. L. Smith. "Effect of Irradiance Level and Iron Chelate Source on the Shoottip Culture of Carica papaya L." HortScience 30, no. 4 (1995): 876E—876. http://dx.doi.org/10.21273/hortsci.30.4.876e.

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Interaction between irradiance levels (5–40 mM–m–2–s–1) and iron chelate sources (FeNa2EDTA and FeNaDTPA) on the establishment, growth, and proliferation of shoot tips of Carica papaya were tested. Reduced irradiance level (5 mM–m–2–s–1) enhanced the establishment of shoot tips regardless of the source of iron chelate tested. At higher irradiance levels (30 and 40 mM–m–2–s–1), presence of FeNaDTPA in the medium enhanced establishment of shoot tips. Continuous or alternating light/dark (16/8 h) photoperiods at high irradiance levels had no effect on the establishment or growth of the culture. A

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45

Siemeling, Ulrich, Thomas Türk, Wolfgang W. Schoeller, Carl Redshaw, and Vernon C. Gibson. "Benefits of the Chelate Effect: Preparation of an Unsymmetricalansa-Bis(imido)molybdenum Complex Containing a Seven-Membered Chelate Ring†." Inorganic Chemistry 37, no. 18 (1998): 4738–39. http://dx.doi.org/10.1021/ic9800381.

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PREDESCU, Corina, Camelia PAPUC, Carmen PETCU, George GORAN, and Amelia Elena RUS. "The Effect of Some Polyphenols on Minced Pork during Refrigeration Compared with Ascorbic Acid." Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Food Science and Technology 75, no. 1 (2018): 36. http://dx.doi.org/10.15835/buasvmcn-fst:0027.

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Quality of meat and meat products by two oxidative processes is affected. The two processes are lipid peroxidation and myoglobin oxidation. To delay oxidative processes, in meat and meat products are added compounds with antioxidant activity.The aim of this study was to evaluate the antioxidant activity of (±)-catechin, quercetin, and gallic acid, on oxidative processes in minced pork, comparatively with ascorbic acid in the same concentration. The ability of antioxidants to reduce DPPH• and to chelate Fe (II) were determinated. Minced pork samples separately with the chemicals were treated. T

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47

Pilný, Radomír, Přemysl Lubal, and Lars I. Elding. "Thermodynamics for complex formation between palladium(ii) and oxalate." Dalton Trans. 43, no. 32 (2014): 12243–50. http://dx.doi.org/10.1039/c4dt01062k.

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48

Guérin, B., C. Chabot, N. Mackintosh, W. W. Ogilvie та Y. Guindon. "Free radicals and Lewis acid. Chelation-controlled radical allylations of substituted α-halo- or α-phenylseleno-β-alkoxy esters. The endocyclic effect." Canadian Journal of Chemistry 78, № 6 (2000): 852–67. http://dx.doi.org/10.1139/v00-074.

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The radical allylation of a series of α-halo or α-phenylseleno-β-alkoxy esters in the presence of MgBr2·OEt2 is reported and compared with analogous reactions under non-chelating conditions. The addition of MgBr2·OEt2 gives excellent selectivity favoring anti products; in some cases ratios >100:1 are obtained. Varying the substrate substituents reveals that these reactions are quite tolerant of alkyl functionalities at the β-position. Changes to the alkoxy function indicate that a chelate is involved in the reaction. The reactions are successful with secondary iodides, bromides, and phenyls

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49

Tilcock, Colin, Quet Fah Ahkong, and Derek Fisher. "99mTc-labeling of lipid vesicles containing the lipophilic chelator PE-DTTA: Effect of tin-to-chelate ratio, chelate content and surface polymer on labeling efficiency and biodistribution behavior." Nuclear Medicine and Biology 21, no. 1 (1994): 89–96. http://dx.doi.org/10.1016/0969-8051(94)90134-1.

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Ma, Chunyan, Fang Li, Caihua Wang та ін. "Tuning the adsorption behaviour of β-structure chitosan by metal binding". Environmental Chemistry 15, № 5 (2018): 267. http://dx.doi.org/10.1071/en18070.

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Environmental contextChitosan is an abundant natural component of marine life with potential applications as an adsorbant material for pollutants. We investigate the binding behaviour of chitosan, and show that the β-type structure readily chelates metal ions leading to enhanced adsorption of anionic pollutants in the chitosan-metal complex. The results are highly relevant to the removal of anionic organic pollutants from water. AbstractChitosan, which is commonly extracted from squid pens of the Loligo genus, has a β-type structure. Chitosan has potential application to the adsorption of poll

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