نتایج جستجو برای: organic solvents

تعداد نتایج: 235734  

2007
Scott L. Taylor

The total oil content of soyflakes, canola seed and wetmilled corn germ were determined by analytical supercritical fluid extraction (SFE) with carbon dioxide as the extraction solvent. Results obtained by SFE were in excellent agreement with those obtained by a conventional Soxhlet technique with organic solvents. The analyticalscale SFE technique yielded average means within one standard devi...

2014
Antonello Di Crescenzo Valeria Ettorre Antonella Fontana

Carbon nanotubes (CNTs) have been proposed and actively explored as multipurpose innovative nanoscaffolds for applications in fields such as material science, drug delivery and diagnostic applications. Their versatile physicochemical features are nonetheless limited by their scarce solubilization in both aqueous and organic solvents. In order to overcome this drawback CNTs can be easily non-cov...

Journal: :International journal of occupational medicine and environmental health 2005
Marek Jakubowski

Exposure to nephrotoxic substances may cause renal tubular and glomerular dysfunction. The aim of the paper was to evaluate, based on literature reports, whether occupational exposure to organic solvents entails a risk of renal dysfunction. The results of the studies performed over the last twenty years are contradictory. In workers occupationally exposed to organic solvents, tubular, glomerula...

2017
Xiaoling Wu Cheng Yang Jun Ge

OBJECTIVES Enzyme/metal-organic framework composites with high stability in protein denaturing solvents were reported in this study. RESULTS Encapsulation of enzyme in metal-organic frameworks (MOFs) via co-precipitation process was realized, and the generality of the synthesis was validated by using cytochrome c, horseradish peroxidase, and Candida antarctica lipase B as model enzymes. The s...

Journal: :Dalton transactions 2015
Xudong Wang Dan Wang Yali Guo Chengduan Yang Anam Iqbal Weisheng Liu Wenwu Qin Dan Yan Huichen Guo

A highly sensitive carbon dot-imidazole (CD-imidazole) nanoprobe is prepared through covalently conjugating imidazole group onto the surface of carbon dots for water fluorescence. In organic solvents, quenching of fluorescence occurs via photoinduced electron transfer (PET) process from the imidazole nitrogen to the CD acceptor. Addition of a trace amount of water into CD nanocomposites in vari...

Journal: :Journal of agricultural and food chemistry 2012
Fulgencio Saura-Calixto

Most research studies in the field of dietary polyphenols or phenolic compounds use a chemical approach focusing exclusively on polyphenols extracted from plant foods with organic solvents. However, an appreciable part of polyphenols are not extracted with organic solvents and thus are ignored in biological, nutritional, and epidemiological studies. Recent studies have shown that these nonextra...

Journal: :Chemosphere 2007
Yu-Jen Shin Yun-Hwei Shen

In this study, various organic solvents were used to prepare coal slurries and the rheological and thermal properties of coal-organic solvent slurries were examined. Solvents with molecules containing unpaired electrons (high basicity) show high extraction power and cause swelling of coal. Therefore, coal-organic solvent slurries usually showed higher viscosities compared to coal-water slurry. ...

Journal: :British journal of industrial medicine 1989
P Hotz J Pilliod D Söderström F Rey M A Boillat H Savolainen

In case-control studies on glomerulonephritis and organic solvents several authors have assessed exposure to organic solvents with a score based on the self reported occupational history. The underlying principle is that all exposures can be weighted by an intensity factor and then added to get one number representative of lifetime exposure. As this score has hitherto not been validated the rel...

Journal: :The Science of the total environment 2006
Shi-Nian Uang Tung-Sheng Shih Chun-Huei Chang Szu-Min Chang Chuen-Jinn Tsai C G Deshpande

The main objective of this study is to investigate the personal or area exposure of organic solvents during paint stripping and paint spraying. Three aircraft paint stripping/spraying workplaces in Taiwan were selected, and the Council of Labor Affairs and NIOSH recommended sampling/analytical methods used in this study. Activated charcoal tubes were used to investigate the personal and area ex...

2012
Hidetaka Noritomi

Enzymes are very effective and biodegradable catalysts, and act under mild conditions such as room temperature, atmospheric pressure, and around pH 7. Consequently, the applications of enzymes to the organic synthesis have extensively been studied from the standpoint of the development of sustainable synthetic processes (Truesdell, 2005). Enzymes exhibit the high activity and specificity not on...

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