Volatile Organic Compounds (VOCs) are widely measured at ppb and ppt level in many contexts, from therapeutic drug control respiratory diseases to monitoring of climate change indoor air quality. The need for accuracy is a common denominator all these fields. interactions between gas mixtures solid surfaces sampling lines instruments play an important role calculating the total uncertainty amou...

Instead of the chlorofluorocarbon specified as the ozone-depleting substance, a chlorinated organic compound, hydrocarbon, alcohol, etc. are used as an alternative washing solvent, and they are used as a mixed solvent in many cases. Therefore, adsorption operation of binary systems is needed. Furthermore, since azeotropic may happen, in the case of the design of a solvent recovery system and op...

Each Dipasic tablet contains 47.2 mgm. of INH and 52 mgrn. of PAS in chemical combination. This substance was first investigated pharmacologically and bacteriologically by Smith and Wiederkehrl who found, by in vitro testing, that various dilutions of tubercle bacilli, resistant to streptomycin and INH, were sensitive to GEWO 339; and they claimed further that its effectiveness in vivo exceeded...

Explosives materials are stable in soil and recalcitrant to biodegradation. Different authors report that TNT (2,4,6-trinitrotoluene), RDX (hexahydro-1,3,5-trinitro-1,3,5-triazine) and HMX (octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine) are toxic, but most investigations have been performed in artificial soil with individual substances. The aim of the presented research was to assess the tox...

The structure and properties of diethanolamine complexes of copper(ii) triflates dissolved in an excess of diethanolamine (DH2) were studied. The copper containing substance was found to be a solution of copper(ii) complex salt [Cu(2+)DH2(DH(-))]OTf(-) in LTTM composition [(DH2)4H(+)](OTf(-)), where LTTM = low-transition-temperature mixture, OTf(-) = triflate anion. According to the EXAFS data,...

tract to a pasty consistency. Alcohol (80 per cent.) is then added and the mixture is centrifugalised and the active principle is obtained in alcoholic solution in the clear top layer. This is pipetted off and mixed with an excess of absolute alcohol in which the active principle becomes precipitated. The precipitate is then dissolved in sterile distilled water, concentrated by distillation in ...

Since the assay method for pantoprazole in pantoprazole pellets is not described in current pharmacopoeias (USP, BP), the aim of this work was to develop and validate a simple, precise and accurate method for determination of pantoprazole in pantoprazole pellets. Separation was achieved on a reversed-phase C8 column (250 x 4.6 mm i.d.; 5 a mixture of phosphate buffer pH 3.0 and acetonitrile as ...

background substance use in patients with psychiatric disorder is an every-day seen. detection of this comorbidity can significantly affect the treatment of these disorders, as well as substance use. objectives this study has been conducted to determine the prevalence and pattern of substance use in hospitalized psychiatric patients. patients and methods in this cross-sectional study, 210 hospi...

Burkholderia glumae produced antibiotic substance(s) on agar plate media, but none in various liquid media. Some minor elements in agar were considered to be involved in the antibiotic production. K+, Ca'~, Mg" and NH4 ~ were shown to play significant roles in the production by culturing the bacterium in liquid media supplemented with various inorganic chemicals. Highest production was observed...