نتایج جستجو برای: alumina sulfuric acid

تعداد نتایج: 758307  

Journal: :Environmental Health Perspectives 1989
M O Amdur

Data from exposure of experimental animals and human subjects to sulfuric acid presents a consistent picture of its toxicology. Effects on airway resistance in asthmatic subjects were well predicted by data obtained on guinea pigs. Sulfuric acid increases the irritant response to ozone in both rats and man. In donkeys, rabbits, and human subjects, sulfuric acid alters clearance of particles fro...

Journal: :The Bulletin of Tokyo Dental College 2010
Yuji Suyama Satoru Takaku Yoshikazu Okawa Takashi Matsukubo

To investigate dental erosion in employees working with sulfuric acid at a lead storage battery manufacturing plant and level of personal exposure to sulfuric ions, we measured sulfuric ion concentrations in the mouth rinse of those employees. We also measured exposure levels from air samples obtained from 2 employees from the same plant who did not work with sulfuric acid using a portable air ...

2002
G. R. Howe

Strong inorganic acid mists containing sulfuric acid are known to be human carcinogens based on sufficient evidence of carcinogenicity from studies in humans that indicate a causal relationship between exposure to strong inorganic acid mists containing sulfuric acid and human cancer. Occupational exposures to strong inorganic acid mists containing sulfuric acid are specifically associated with ...

2005
R. W. Carlson M. S. Anderson R. Mehlman R. E. Johnson

Sulfuric acid hydrate has been proposed as an important species on Europa’s surface, the acid being produced by radiolysis of surficial sulfur compounds. We investigated the spectral properties of disordered and crystalline forms of sulfuric acid and suggest that the hydration properties of Europa’s hypothesized sulfuric acid lie between two end members: liquid sulfuric acid and its higher crys...

Journal: :Periodica Polytechnica Chemical Engineering 2011

Journal: :Soil Science 1936

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد یزد - دانشکده شیمی 1392

in this study, a simple, rapid and selective method was developed for the determination of dexamethasone. the proposed method is based on inhibitory effect of dexamethasone on the oxidation of orange-g by bromate in sulfuric acid media. the reaction was followed spectrophotometrically at 478.5 nm (?max). under optimum experimental conditions, (72.6 ?mol l-1 of orange-g, 0.76 mol l-1 of h2so4, 0...

Journal: :Bioresource technology 2012
Ananda S Amarasekara Bernard Wiredu

Single step pretreatment-saccharification of corn stover was investigated in aqueous p-toluenesulfonic and sulfuric acid media. Dilute aqueous solution of p-toluenesulfonic acid was a better catalyst than aqueous sulfuric acid of the same H(+) ion concentration for single step pretreatment-saccharification of corn stover at moderate temperatures and pressures. For example, 100mg corn stover hea...

Journal: :international journal of aquatic biology 0
seyyed morteza hoseini faculty of fisheries and environmental sciences, gorgan university of agricultural sciences and natural resources mohammad hadi abolhassani faculty of fisheries and environmental sciences, gorgan university of agricultural sciences and natural resources rasool ghorbani faculty of fisheries and environmental sciences, gorgan university of agricultural sciences and natural resources

in the present study, sulfuric acid was used for artemia cysts decapsulation. cysts of artemia franciscana were hatched out in regular manner or following hypochlorite or acid decapsulation. two acid concentrations (1 and 5%), three acid immersion times (10, 30 and 50 min) were used and hatching rates were recorded after 15, 18 and 24 h incubation. hatching rates increased but hatching time dec...

Journal: :international journal of occupational hygiene 0
mohammadjavad jafari dept of occupational health eng, faculty of health, shahid beheshti university of medical sciences, tehran, iran. majid hajibabaei dept of occupational health eng, faculty of health, ahvaz jundishapur university of medical sciences, ahvaz, iran. ahmadreza yazdanbakhsh dept of environmental health eng, faculty of health, shahid beheshti university of medical sciences, tehran, iran. yadoolah mehrabi dept of epidemiology, faculty of health, shahid beheshti university of medical sciences, tehran, iran. roohollah ghasemi dept of occupational health eng, faculty of health, zabol university of medical sciences, zabol, iran. marzieh kazempour dept of occupational health eng, faculty of health, shahid beheshti university of medical sciences, tehran, iran.

original paper   the mass-transfer media plays a significant role on the performance of a packed tower. in this paper three counter-current single-stage packed towers at laboratory scale, randomly packed with two different sizes of two types of packing material were experimentally tested to study the role of the packing on the performance of them in the removal of sulfuric acid mists. gas sampl...

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