نتایج جستجو برای: organic solvents

تعداد نتایج: 235734  

2017
Ingrid Astrid Jiménez Barbosa

The use of organic solvents in developing countries has been wide spread in the last century [1]. Organic solvents are used in different industrial processes and are sometimes considering important supplies in order to obtain more benefit in any type of manufacturer business, due to they can be reused [2]. Organic solvents are commonly used in the dry cleaning industry, because relatively stabl...

2013
Tifeng Jiao Fengqing Gao Qingrui Zhang Jingxin Zhou Faming Gao

In this paper, new bolaform cholesteryl imide derivatives with different spacers were designed and synthesized. Their gelation behaviors in 23 solvents were investigated, and some of them were found to be low molecular mass organic gelators. The experimental results indicated that these as-formed organogels can be regulated by changing the flexible/rigid segments in spacers and organic solvents...

2009
MOHAMMAD MAZLOUM-ARDAKANI SHAHRAM LOTFI MOHAMMAD NOROOZI

The acid–base properties of calcon (1-(2-hydroxy-1-naphthylazo)-2-naphthol-4-sulfonic acid) in water and mixed water–organic solvents at 25 °C at an ionic strength of 0.10 M are studied by a multiwavelength spectrophotometric method. The organic solvents used were the amphiprotic (methanol), dipolar aprotic (dimethylsulfoxide), and low basic aprotic (acetonitrile). To evaluate the pH absorbance...

2013
Tifeng Jiao Yujin Wang Qingrui Zhang Jingxin Zhou Faming Gao

In this paper, new azobenzene imide derivatives with different substituent groups were designed and synthesized. Their gelation behaviors in 21 solvents were tested as novel low-molecular-mass organic gelators. It was shown that the alkyl substituent chains and headgroups of azobenzene residues in gelators played a crucial role in the gelation behavior of all compounds in various organic solven...

2011
Julian Thiele Adam R. Abate Ho Cheung Shum Simone Bachtler Stephan Förster David A. Weitz

We present a versatile technique for fabricating polymersomes in glass-coated stamped microfluidic devices. We use templates comprised of double emulsions with a shell of block copolymers dissolved in organic solvents. The double emulsions direct the assembly of amphiphilic diblock copolymers into polymersomes during evaporation of the organic solvents. Our device consists of a single cross jun...

Journal: :ACS nano 2013
Rouhollah Jalili Seyed Hamed Aboutalebi Dorna Esrafilzadeh Konstantin Konstantinov Simon E Moulton Joselito M Razal Gordon G Wallace

We introduce soft self-assembly of ultralarge liquid crystalline (LC) graphene oxide (GO) sheets in a wide range of organic solvents overcoming the practical limitations imposed on LC GO processing in water. This expands the number of known solvents which can support amphiphilic self-assembly to ethanol, acetone, tetrahydrofuran, N-dimethylformamide, N-cyclohexyl-2-pyrrolidone, and a number of ...

2004
Sebastián Torres Guillermo R. Castro

Enzymes are highly specific catalysts that typically function in aqueous solvents. However, many enzymes retain their catalytic activities at high concentrations in non-aqueous environments, including neat hydrophilic organic solvents. In fact, enzymes can be used to carry out reactions in organic solvents that are not possible in aqueous systems. Therefore, biocatalysis in homogenous non-aqueo...

2012
Magdalena Regel-Rosocka Maciej Wisniewski

Solvents and catalysts for organic reactions:  Friedel-Crafts reactions,  Alkylation,  Izomerisation,  Acylation,  Esterification,  Cracking,  Diels-Alder addition,  Wittig reactions,  Polymerisation. Solvents in separation processes:  Extraction of metals and organic compounds,  Nuclear wastewater treatment,  Production of selective liquid membranes and sensors. Others:...

2001
Carla Mattos Dagmar Ringe

Catalysis in organic solvents and the mapping of protein surfaces using multiple solvent crystal structures are two rapidly developing areas of research. Recent advances include the study of protein folding and stability in different solvents, and the demonstration that it is possible to qualitatively rank the affinities of protein binding sites for a given organic solvent using the multiple so...

2018
Kazuya Iseda Kenta Kokado Kazuki Sada

In this study, we performed conductometry in various organic solvents to directly detect the transformation from tetrabutylammonium chloride (TBACl) ion-pair salt to the free ions through complexation with meso-octamethylcalix[4]pyrrole (CP), which is a well-known receptor for chloride anions. In the presence of CP, the conductivity of TBACl increases in various non-polar solvents, indicating t...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید