نتایج جستجو برای: cosolvent
تعداد نتایج: 416 فیلتر نتایج به سال:
The dissolution of cellulosic flax fibres in the ionic liquid 1-ethyl-3-methylimidazolium acetate ([C2mim][OAc]) with cosolvent dimethyl sulfoxide (DMSO) has been studied. were submerged liquid/DMSO mixtures at different temperatures for a range times, then coagulated water. After drying, cross sections analysed using an optical microscope, which was used to track fraction fibre. temperature de...
The purpose of the study is to prepare reversible thermochromic materials with good discoloration properties, which are used as fillers a new type ink. Reversible were prepared by solid phase method crystal violet lactone chromogenic agent, boric acid agent and hexadecanol cosolvent, ink was using material filler. scanning electron microscope images showed that spherical had advantages non-adhe...
Rapid damping of interfaces experiencing vibrations is critical to the performance many complex mechanical systems ranging from airplanes human bodies. Current synthetic materials utilized in vibration are limited by either their frequency range, tunability, or environmental stability. Here, it shown how single metal ion cross-linked hydrogels exhibit tunable across a large range and multiple b...
Leishmaniasis is a parasitic infection that is considered worldwide one of the most important public health problem, affecting more than 12 million people with an estimated number of 2 million new cases occurring annually. Among the compounds isolated from Tabernaemontana catharinensis, coronaridine and voacangine are the indole alkaloids which have antileishmanial activity. In this work, the t...
Silica aerogels are among the most easily produced types of aerogels due to the availability of required materials, the cheapness of required materials such as carbon dioxide, ethanol, and tetraethyl orthosilicate, and the relatively simple sol-gel chemistry. Using silica aerogels as skeletons, nanomaterials were easily and effectively structured in three dimensions. The aerogels were doped wit...
Aqueous NMR Signal Enhancement by Reversible Exchange in a Single Step Using Water-Soluble Catalysts
Two synthetic strategies are investigated for the preparation of water-soluble iridium-based catalysts for NMR signal amplification by reversible exchange (SABRE). In one approach, PEGylation of a variant N-heterocyclic carbene provided a novel catalyst with excellent water solubility. However, while SABRE-active in ethanol solutions, the catalyst lost activity in >50% water. In a second approa...
A rapid throughput octanol-water lipophilicity measurement based on 96-well shake-flask and LC/UV/APPI/MS is described. The method utilizes central liquid storage where compounds are stored as 10 mM solutions in dimethyl sulfoxide (DMSO). The DMSO is subsequently removed to generate solid like material used for LogD measurement. The removal of DMSO minimizes the concern for potential DMSO cosol...
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