نتایج جستجو برای: organic product

تعداد نتایج: 471450  

2002
Stefan Mecking Anke Held Florian M. Bauers

Aqueous catalytic polymerization may seem like a contradiction at first sight. The high water sensitivity of Ziegler or Phillips catalysts applied commercially for the production of polyolefins is well known. However, water offers a unique combination of properties as a medium for polymerization reactions: A high heat capacity, which enables an effective transfer of the heat of polymerization. ...

Journal: :Biomedical sciences instrumentation 2011
Rula M Allaf Iris V Rivero

Several widely used techniques for the fabrication of three dimensional (3D) scaffolds utilize the particulate leaching method to achieve a porous structure. This method involves the selective leaching of a mineral or an organic compound to generate pores. However, scaffolds prepared by this technique tend to exhibit limited interconnectivity. Therefore, to enhance the interconnectivity of the ...

Journal: :Applied and environmental microbiology 1994
R Aono T Negishi H Nakajima

A variety of genes are involved in determining the level of organic solvent tolerance of Escherichia coli K-12. Gene ostA is one of the genes contributing to the level of organic solvent tolerance. This gene was cloned from an n-hexane-tolerant strain of E. coli, JA300. A JA300-based n-hexane-sensitive strain, OST4251, was converted to the n-hexane-tolerant phenotype by transformation with DNA ...

Journal: :ACS nano 2017
Avijit Baidya Mohd Azhardin Ganayee Swathy Jakka Ravindran Kam Chiu Tam Sarit Kumar Das Robin H A Ras Thalappil Pradeep

In view of a great demand for paper-based technologies, nonwettable fibrous substrates with excellent durability have drawn much attention in recent years. In this context, the use of cellulose nanofibers (CNFs), the smallest unit of cellulosic substrates (5-20 nm wide and 500 nm to several microns in length), to design waterproof paper can be an economical and smart approach. In this study, an...

2008
Tae-Ho Yoon Lan-Young Hong Sang-Hee Park Kyung-Ik Min Sung-Joon Park Dong-Pyo Kim

Microreactors fabricated with optically transparent inorganic polymers from two types of ceramic precursors using a UV-micro-imprinting process demonstrated reliable solvent resistance, biocompatible and capability for performing photo catalytic and organic synthetic reactions, which were compared with batch systems and glass based microreactors. It is for the first time that the polymer-based ...

2017
Charlotte K. Rouse Adam D. Martin Christopher J. Easton Pall Thordarson

A peptide amphiphile is reported, that gelates a range of polar organic solvents including acetonitrile/water, N,N-dimethylformamide and acetone, in a process dictated by β-sheet interactions and facilitated by the presence of an alkyl chain. Similarities with previously reported peptide amphiphile hydrogelators indicate analogous underlying mechanisms of gelation and structure-property relatio...

Journal: :Biochemical Society transactions 1991
T Sirman L Pyle A S Grandison

Liquid membranes usually consist of an extracting agent (carrier) in an organic solvent which separates "feed" and "stripping" phases containing aqueous solutions of the solute of interest and a stripping agent, respectively. In supported liquid membranes (SLMs) the membrane solution is immobilised into a thin solid microporous support, between the feed and stripping phases where transport is f...

Journal: :Dalton transactions 2013
Chisato Kato Sadafumi Nishihara Ryo Tsunashima Yoko Tatewaki Shuji Okada Xiao-Ming Ren Katsuya Inoue De-Liang Long Leroy Cronin

Herein we report the synthesis of α-Dawson type POM, Li6[α-P2W18O62]·28H2O, directly from the use of Li2WO4 as the tungstate source. The salt obtained was soluble not only in water but also in a range of polar and non-polar organic solvents, such as benzene.

2014
Mildred Quintana Jesús Iván Tapia Maurizio Prato

The development of chemical strategies to render graphene viable for incorporation into devices is a great challenge. A promising approach is the production of stable graphene dispersions from the exfoliation of graphite in water and organic solvents. The challenges involve the production of a large quantity of graphene sheets with tailored distribution in thickness, size, and shape. In this re...

Journal: :Applied and environmental microbiology 1997
R Aono H Kobayashi

In this study, we examined cell surface properties of mutants of Escherichia coli for which organic solvent tolerance levels were elevated. The cell surface of each mutant was less hydrophobic than that of the parent, probably due to an increase in lipopolysaccharide content. OmpF synthesis was repressed in the mutants. Organic solvent bound readily to viable E. coli cells in response to the po...

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