نتایج جستجو برای: copper ii cation
تعداد نتایج: 695395 فیلتر نتایج به سال:
We report the synthesis of alloyed quaternary and quinary nanocrystals based on copper chalcogenides, namely, copper zinc selenide-sulfide (CZSeS), copper tin selenide-sulfide (CTSeS), and copper zinc tin selenide-sulfide (CZTSeS) nanoplatelets (NPLs) (∼20 nm wide) with tunable chemical composition. Our synthesis scheme consisted of two facile steps: i.e., the preparation of copper selenide-sul...
Copper (II) phthalocyanine and 2,9,16,23 tetrakis nitro copper (II) phthalocyaninehas been synthesized respectively from phthalonitrile and 4-nitro phthalonitrile under solvent-free condition using two different catalystsovernanodimensionalzeolites. 4-Nitro phthalonitrile synthesized from phthalimide in three steps. The newly prepared compounds have been characterized by IR, UV-Vis, 1</sup...
رشد و گسترش بسیاری از گیاهان به واسطه فعالیت هورمون های گیاهی تنظیم می شود. نتایج تجربی نشان دادند که هورمون تراپی با هورمون ga3 تاثیر معناداری بر روی توزیع مونوترپن ها در گیاهrubus caesius دارد. در حضور هورمون ga3 غلظتcineole و ? –cadinene کاهش و میزان ? –terpinoleneand longifoleneافزایش یافت. با بررسی مسیر بیوسنتزی مشخص شد که ? –terpinolene و cineoleاز حدواسط ? –terpinyl cation مشتق شده اند و...
The crystal structure of plastocyanin from a green alga, Ulva pertusa, has been determined at 1.6-A resolution. At its copper site, U. pertusa plastocyanin has a distorted tetrahedral coordination geometry similar to other plastocyanins. In comparison with structures of plastocyanins reported formerly, a Cu(II)-Sdelta(Met92) bond distance (2.69 A) is shorter by about 0.2 A and a Cu(II)-Sgamma(C...
Microbial resistance to antibiotics is one of the biggest public health threats of the modern world. Antibiotic resistance is an area of much clinical relevance and therefore research that has the potential to identify agents that may circumvent it or treat resistant infections is paramount. Solution behavior of various fluoroquinolone (FQ) complexes with copper(II) in the presence and absence ...
Copper (II) phthalocyanine and 2,9,16,23 tetrakis nitro copper (II) phthalocyaninehas been synthesized respectively from phthalonitrile and 4-nitro phthalonitrile under solvent-free condition using two different catalystsovernanodimensionalzeolites. 4-Nitro phthalonitrile synthesized from phthalimide in three steps. The newly prepared compounds have been characterized by IR, UV-Vis, 1</sup...
Three naphtol derivativesweresynthesized using several strategies; in first stage, was synthetized the compound 4(1-[(2-Amino-ethylamino)-phenyl-methyl]-naphthalen-2-ol) using the three-component system (β-naphtol, benzaldehyde and ethylenediamine).The secondstage involves the synthesis of1-{[2-Hex-1-ynyl-phenyl-amino)-ethylamino]-phenyl-methyl}-naphtalen2-ol (6) by the reaction of 4 with 1-hex...
A new microcrystal test for the detection of gamma-hydroxybutyrate (GHB) is described. The silver/copper reagent consists of an aqueous solution of 0.1 g of cupric nitrate and 0.1 g of silver nitrate in 10.0 mL water. While some crystals form upon evaporation of the reagent, the test forms distinctive crystals for GHB and does not form crystals with some commonly encountered controlled substanc...
our main objective is a better understanding of spin spin interaction of dinuclear copper(ii) complexes through system. the synthesis and characterization of two new dinuclear copper(ii) complexes, based on the use of large, pyrole-containing macrocycles, the so called “ expanded porphyrins” , [cu2(macrocycle)]4+ is described. a chloroform solution spectrum of two complexes taken at room tem...
In vivo, copper(II) is a major source of reactive oxygen species (ROS) via Fenton Haber Weiss reactions. Interest in Alzheimer’s disease has led to intensive studies into the generation of ROS catalyzed by copper(II) with or without the presence of β-amyloid (Aβ) peptides and biological antioxidants. We establish a potential connection between tyrosine nitration and copper(II) toxicity in neuro...
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