نتایج جستجو برای: organic product

تعداد نتایج: 471450  

2010
M. KANCHANA

Proteases are very important industrial enzymes, which contribute about 60% of the total world enzyme market. Among the various proteases, bacterial proteases are the most significant, compared with animal and fungal proteases (Rahman et al., 1994) and among bacteria, Bacillus sp are specific producers of extra-cellular proteases (Coolbear et al., 1992; Banerjee et al., 1999). These enzymes hav...

Journal: :Chemical communications 2015
Tongnian Gu Mingliang Zhang Jia Chen Hongdeng Qiu

Deep eutectic solvents (DESs), as a novel class of green solvents, were successfully applied as eco-friendly and sustainable reaction media for fast surface modification of spherical porous silica, resulting in stationary phases for high-performance liquid chromatography. The new reaction media were advantageous over organic solvents in many aspects, such as the high dispersibility of silica sp...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2007
Yanli Xi Huiru Dong

An effective method for separating and enriching organophosphorous pesticides (OPPs) from vegetables by solvent sublation and the OPPs determination by gas chromatography with flame photometric detector (GC-FPD) has been developed. The effects of organic solvent, nitrogen flow rate, pH of the solution, sublation time etc. on the sublation efficiency of OPPs were investigated in detail, and the ...

Journal: :Chemical communications 2013
Anna Zep Miroslaw Salamonczyk Nataša Vaupotič Damian Pociecha Ewa Gorecka

The achiral liquid crystalline materials showing two B4 (HN) phases have been found to exhibit strong gelation ability for various organic solvents with reversible sol-gel phase transition. The gel is formed by helical tubules, which build entangled 3D network, encapsulating the solvent. The equilibrium of left- and right-handed tubules is preserved in the gel, even if the chiral solvent is used.

2016
Thibault Demoulin George W. Scherer Fred Girardet Robert J. Flatt

The magnitude of the thermal stresses that originate in an acrylic-based repair material used for the reprofiling of natural sandstone is analyzed. This kind of artificial stone was developed in the late 1970s for its peculiar property of reversibility in an organic solvent. However, it displays a high thermal expansion coefficient, which can be a matter of concern for the durability either of ...

2005
Thomas Wenzel

Before examining chromatographic separations, it is useful to consider the separation process in a liquid-liquid extraction. Certain features of this process closely parallel aspects of chromatographic separations. The basic procedure for performing a liquid-liquid extraction is to take two immiscible phases, one of which is usually water and the other of which is usually an organic solvent. Th...

2012
Mariana Roberto Gama Raquel Gomes da Costa Silva Carol H. Collins Carla B.G. Bottoli

In the early 1990s, hydrophilic interaction (liquid) chromatography (HILIC) emerged as a new separation method. HILIC is becoming increasingly popular for the separation of polar compounds in aqueous-organic mobile phases rich in organic solvents (usually acetonitrile). It has become important for the separation of pharmaceuticals, neurotransmitters, nucleosides, nucleotides and other compounds...

2015
Ana B. Serrano-Montes Dorleta Jimenez de Aberasturi Judith Langer Juan J. Giner-Casares Leonardo Scarabelli Ada Herrero Luis M. Liz-Marzán

We present a general route for the transfer of Au and Ag nanoparticles of different shapes and sizes, from water into various organic solvents. The experimental conditions for each type of nanoparticles were optimized by using a combination of thiolated poly(ethylene glycol) and a hydrophobic capping agent, such as dodecanethiol. The functionalized nanoparticles were readily transferred into or...

Journal: :Bioresource technology 2012
Noppadon Sathitsuksanoh Zhiguang Zhu Y-H Percival Zhang

Developing feedstock-independent biomass pretreatment would be vital to second generation biorefineries that would fully utilize diverse non-food lignocellulosic biomass resources, decrease transportation costs of low energy density feedstock, and conserve natural biodiversity. Cellulose solvent- and organic solvent-based lignocellulose fractionation (COSLIF) was applied to a variety of feedsto...

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