نتایج جستجو برای: solvents

تعداد نتایج: 45213  

Journal: :Chemical communications 2002
Douglas F Foster Dave J Adams David Gudmunsen Alison M Stuart Eric G Hope David J Cole-Hamilton

Triaryl-phosphines and -phosphites bearing fluorous ponytails give high rates, good linear selectivity and good retention of catalyst in the fluorous phase during hydroformylation of alkenes in fluorous solvents.

Journal: :Lancet 1997
R F White S P Proctor

We describe the clinical evaluation of the nervous-system effects of solvent exposure. We review the current evidence in the epidemiological literature on neurotoxicological effects of solvents, and outline methods and issues to be taken into account in assessment of the patient whose symptoms may be related to solvent toxicity. Primary prevention of these disorders is essential, because treatm...

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: :Chemical communications 2014
Zhenyu Sun Xing Huang Fang Liu Xiaoning Yang Christoph Rösler Roland A Fischer Martin Muhler Wolfgang Schuhmann

Four organic amine-based solvents were discovered which enable direct exfoliation of graphite to produce high-quality and oxygen-free graphene nanosheets. These solvents outperform previously used solvents and additives such as N-methyl-pyrrolidone and surfactants in terms of their dispersing capacity. The resulting dispersions allow the facile fabrication of zeolitic imidazolate framework (ZIF...

Faramarz Sadeghzadeh Darabi Mohammad Khodadadi-Moghaddam

Heterogeneous catalytic hydrogenation of cyclohexene, catalyzed by Pt/A1203, was carried out in thirteenvarious solvents (four alcoholic solvents, six aprotic polar solvents and three non polar solvents) at 25 °C.Single-parameter correlations of logk vs. normalized polarity parameter (ETN), hydrogen-bond acceptorbasicity (p), hydrogen-bond donor acidity (a) and dipolarity/polarizibility (it*) d...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - پژوهشکده علوم 1388

heteropoly acids (hpa) and their salts have advantages as catalysts which make them both economically and environmentally attractive, strong br?nsted acidity, exhibiting fast reversible multi-electron redox transformations under rather mild conditions, very high solubility in polar solvents, fairly high thermal stability in the solid states, and efficient oxidizing ability, so that they are imp...

ژورنال: طب کار 2016
عطارچی, میرسعید, محمدی, صابر, والی راد, فاطمه, پورزارع, غفور,

Introduction: Based on the results of some studies, concurrent exposure to organic solvents and noise in industrial areas can accelerate the amount of hearing loss. The aim of this study was to assess the effect of concurrent exposure to organic solvents and noise on high frequency hearing loss. Method: This was a cross-sectional analytic study conducted on 1029 tire manufacturing company wo...

2014
Shubha Srivastava Tanweer Alam

Quantum mechanical calculations of different energies components of 1,10-phenanthroline in ground state were carried out by DFT method , in isolated state and in various solvents to study the effects of solvents on various energy components . The solvation energy, chemical potential, hardness, electrophilicity of 1,10-phenanthroline were calculated with the help of computed HOMO-LUMO gap of 1,1...

2003
Raphael Metzger

Organic solvents have long been recognized as being toxic to multiple organ systems. It is commonly known that exposure to organic solvents causes hematologic diseases, including hematologic cancers such as leukemia and lymphoma. A large body of literature has developed which shows that exposure to organic solvents causes kidney disease, especially chronic glomerulonephritis. A number of recent...

2013
Ewa Hawlicka Tomasz Lis

The conductivity of N al in ternary solvents consisting of water, alcohol and urea has been determined at 25 °C in its dependence on the alcohol concentration. Viscosities and static dielectric constants of these ternary solvents have also been measured. It has been found that in all studied solvents the limiting equivalent conductivities A0 are smaller than those in binary solvents despite of ...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید