Barbituric Acid
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. SÍNTESE, ESTUDOS ESPECTROSCÓPICOS E ESTRUTURAIS DE COMPLEXOS CONTENDO O LIGANTE 4,4- BIPIRIDINA, O ÂNION BARBITURATO E OS ÍONS METÁLICOS DA PRIMEIRA SÉRIE DE TRANSIÇÃO (Fe2+, Co2+, Ni2+, Cu2+ e Zn2+)
This work describes the synthesis and characterization of five new transition metal complexes of general formula MB2Bipy.10H2O (where M = Fe2+, Co2+, Ni2+, Cu2+ and Zn2+, B is barbiturate anion and Bipy is 4,4-bipyridine) . Several physical and spectroscopical techniques were used to characterize the compounds, such as elemental analysis (CHN), thermal analy
Publicado em: 2009
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2. Café (Coffea arabica, L.) submetido a diferentes condições de torrefação: caracterização química e avaliação da atividade antioxidante e sensorial / Coffee (Coffea arabica, L.) submitted to different roasting conditions: chemical characterization and evaluation of sensorial and antioxidant activity
Evaluation of antioxidant activity of plant phenolic compounds has been studied as an alternative to the use of synthetic antioxidants, such as butil-hydroxy -toluene (BHT). In this paper we evaluated the in vitro antioxidant capacity of coffee extracts (ether, ethanol and aqueous) and fractions ( free, bound and unbound) roasted for different periods of tim
Publicado em: 2007
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3. Oxidações bio e fotosensibilizadas por oxigenio singlete : consequencias em sistemas quimicos e bioquimicos
Our experiments show that an effective procedure for verifying the presence of singlet oxygen in biological systems involves the use of the following techniques: photon emission, emission spectra, product distributuion, D20 effect, DABCO effect, quencher effect and steady state techniques. Our experiments lead to the conclusion that singlet oxygen is present
Publicado em: 1981
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4. A simple, inexpensive urine test of smoking.
Three novel colorimetric methods of detecting urinary nicotine metabolites called the barbituric acid, diethylthiobarbituric acid (DETB), and DETB extraction methods were evaluated for use as a simple, cheap, objective test of smoking. Urine samples were collected from 103 male smokers and 78 male non-smokers working at two London factories. The smokers reco
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5. POISONING WITH DERIVATIVES OF BARBITURIC ACID
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6. A CASE OF POISONING WITH A DERIVATIVE OF BARBITURIC ACID
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7. Studies on the control of pyrimidine biosynthesis in human diploid cell strains. II. Effects of 5-azaorotic acid, barbituric acid, and pyrimidine precursors on cellular phenotype.
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8. NUTRITIONAL REQUIREMENTS OF BACILLUS POPILLIAE1
Sylvester, Charles J. (Michigan State University, East Lansing), and Ralph N. Costilow. Nutritional requirements of Bacillus popilliae. J. Bacteriol. 87:114–119. 1964.—Bacillus popilliae grew consistently well in a semisynthetic medium containing a “vitamin-free,” salt-free, acid hydrolysate of casein supplemented with dextrose, dl-tryptophan, and th
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9. Rifomycin: XIV. Production of Rifomycin B
The production of a fraction of the rifomycin complex (rifomycin B) by Streptomyces mediterranei has been described. Both qualitative and quantitative aspects of the fermentation are determined by suitable agitation-aeration parameters. In addition to conventional nutrient ingredients, the presence of some of the barbituric acid derivatives was found to be e
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10. Gene Sequence and Properties of an s-Triazine Ring-Cleavage Enzyme from Pseudomonas sp. Strain NRRLB-12227
Pesticides based on the s-triazine ring structure are widely used in cultivation of food crops. Cleavage of the s-triazine ring is an important step in the mineralization of s-triazine compounds and hence in their complete removal from the environment. Cyanuric acid amidohydrolase cleaves cyanuric acid (2,4,6-trihydroxy-s-triazine), which yields carbon dioxi
American Society for Microbiology.
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11. Production and Stabilization of Cells of Bacillus popilliae and Bacillus lentimorbus1
Bacillus popilliae and B. lentimorbus grew most rapidly and to the greatest extent in aerated cultures at 30 to 32 C with oxygen absorption rates of 1 mmole of O2 per min per liter, or above. The control of pH also increased the maximal populations attained. Media were developed which consistently produced cell populations of about 109 within 24 to 48 hr in
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12. Prediction of adsorption from multicomponent solutions by activated carbon using single-solute parameters. Part II—Proposed equation
Prediction of multicomponent adsorption is still one of the most challenging problems in the adsorption field. Many models have been proposed and employed to obtain multicomponent isotherms from single-component equilibrium data. However, most of these models were based on either unrealistic assumptions or on empirical equations with no apparent definition.
Springer-Verlag.