نتایج جستجو برای: hedp hydroxy ethilidene diphoshponate

تعداد نتایج: 31324  

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده علوم پایه 1391

چکیده: در این پروژه از واکنش متیل آنترانیلات (1) با مواد مختلف محصولات گوناگونی به عنوان ضدآفتاب سنتز شده به طوری که: از واکنش متیل آنترانیلات (1) با اپی کلروهیدرین (2) و الاستین (5) محصول (methyl 2-(2-hydroxy-3-(elastin)propylamino)benzoate (7 با بازده خوب بدست آمد. از واکنش متیل آنترانیلات (1) با آلدهید (8) و الاستین (5) مشتقات (9) سنتز گردید. r` r 9 h h a oh-2-ph h b ome-2-ph h c ph...

Journal: :Materials advances 2022

The combination of 1-hydroxy-tetrazole and 1-hydroxy-1,2,4-triazole produces a new bisheterocyclic moiety, which is characterized derivatized extensively. We tried to combine the positive advantages TKX-50 MAD-X1 backbone with this building block.

Journal: :Nucleic acids research 2001
K Fujikawa H Kamiya H Yakushiji Y Nakabeppu H Kasai

The human nucleotide pool sanitization enzyme, MTH1, hydrolyzes 2-hydroxy-dATP and 8-hydroxy-dATP in addition to 8-hydroxy-dGTP. We report here that human MTH1 is highly specific for 2-hydroxy-ATP, among the cognate ribonucleoside triphosphates. The pyrophosphatase activities for 8-hydroxy-GTP, 2-hydroxy-ATP and 8-hydroxy-ATP were measured by high-performance liquid chromatography. The kinetic ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه زنجان - دانشکده علوم انسانی 1390

چکیده کاتالیست های ناهمگن (1) (silica gel)-o2(eto)si-l1-mn(hl2) ، (silica gel)-[o2(meo) ni-h2l3(h2o)] (3)، (silica gel)-[o2(meo) cu-l4(h2o)2] (4) باکارایی و گزینش پذیری بالا به ترتیب از طریق تثبیت کمپلکس های منگنز، مس و نیکل روی بستر های معدنی سنتز شدند. کاتالیست دستوار(2) sio2-[mn3(µ-d-(?)-tart)2(ohch3)6(ch3co2)] از طریق حلال کافت سل-ژل و تراکم چندتایی باز شیف در حضور d- (-) تارتاریک اسید در...

Journal: : 2023

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...

Journal: :Organic materials 2021

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...

Journal: :Nature Communications 2021

Abstract Magnetized plasma interactions are ubiquitous in astrophysical and laboratory plasmas. Various physical effects have been shown to be important within colliding flows influenced by opposing magnetic fields, however, experimental verification of the mechanisms interaction region has remained elusive. Here we discuss a laser-plasma experiment whereby results verify that Biermann battery ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1390

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...

ژورنال: پوست و زیبایی 2011
آزادی, آزاده, بابایی‌نژاد, شهلا, عظیمی, حمیده, هریزچی‌قدیم, حمیده, گل‌فروشان, فریده,

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 ...

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