نتایج جستجو برای: hydroxy sodalite
تعداد نتایج: 31511 فیلتر نتایج به سال:
One of the research projects is concerned with the four-membered saturated inorganic ring system called cylcodiphosphazanes, which essen ally act as monoor bidentate ligands toward transi on metals. Deriva ves of cyclodiphosphazanes containing oxygen, sulphur, phosphorous or nitrogendonor-func onali es have shown versa le coordina on behaviour, resul ng in simple mononuclear to tri-, tetraor po...
Catalysis of the acylation aniline with 3-hydroxy-2-naphthoic, 1-hydroxy-2-naphthoic, 2-hydroxy-1-naphthoic and 1-hydroxy-4-naphthoic acids by phosphorus P(III) silicon Si(IV) compounds leads to formation anilides corresponding hydroxynaphthoic under mild conditions (ortho-xylene, 146.5–147 °C) in almost quantitative yield.
 Among trichloride tribromide; phosphorous, 1-hydroxyethyliden...
Motivated by recent discovery of yttrium-based high-temperature ternary superconducting hydrides (e.g., CaYH$_{12}$, LaYH$_{12}$, and ScYH$_{6}$), we have employed evolutionary algorithm first-principles calculations to comprehensively examine the structural stability superconductivity YMgH$_{x}$ system at high pressure. The hydrogen content $x$ pressure are both important factors in these cand...
Poly(α-hydroxy acids), as a family of biodegradable polyesters, are valuable materials due to their broad applications in packaging, agriculture, and biomedical engineering. Herein we highlight explore recent advances catalysts controlled ring-opening polymerization O-carboxyanhydrides towards functionalized poly(α-hydroxy especially metal catalyst-mediated polymerization. Limitations current s...
abstract in first part of this project, the use of a new and biguanid-like catalyst supported on silica as a recyclable catalyst provides a new route for the synthesis of a variety of arylalkylidene rhodanine derivatives through knoevenagle reaction in at present of solvent at room temperature. rhodanine derivatives and especially arylalkylidene rhodanines have proven to be attractive compound...
Background and Aim: Anti-inflammatory and hypo- pigmenting effects of topical tretinoin and alpha-hydroxy acids have been documented. This study was designed to compare the efficacy of 0.05% tretinion cream with 7% alpha-hydroxy acid in the treatment of ephelides. Methods: In this clinical trial 80 patients with ephelides were selected and allocated into two groups. One group was treated with ...
a number of 6-hydroxy-2-benzylidene-3-coumaranones were synthesized from condensation of 6-hydroxy-3-coumaranone with appropriate aldehydes and were evaluated for their antioxidant activities. the antioxidant activity was assessed using two methods, including, 1,1-biphenyl-2-picrylhydrazyl (dpph) radical scavenging, and reducing power assays. some of the benzylidene coumaranones showed antioxid...
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