Facultad de Ciencias Químicas y Farmacéuticas: Recent submissions
Now showing items 4141-4160 of 5062
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(Universidad de chile, 1985)
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(ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD, 2011-03)Chenopodium quinoa Willd (quinoa) has been a source of food for millennia by the Andes region native population. Because of its bitter taste, quinoa seeds are commercialized without their coat for human consumption. Quinoa ...
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(PERGAMON-ELSEVIER SCIENCE LTD, 1998)Industrial and domestic waste waters in Chile are discharged without previous treatment into rivers and other inland waters which are used to irrigate agricultural lands. The present study reports on results obtained when ...
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(IST CHIMICA AGRARIA, UNIV PISA VIA S MICHELE DEGLI SCALZI, 1999-05)The content and the chemical forms of chromium, copper, nickel and zinc in allophanic and montmorillonitic soils, one of them irrigated exclusively with untreated sewage waters, were studied. To gain information about the ...
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(MARCEL DEKKER INC, 1999)Soil samples from a field irrigated with untreated industrial and municipal wastewater for several decades and from a field not receiving wastewater (control) were analyzed for total copper (Cu) and zinc (Zn) and for the ...
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(ELSEVIER SCIENCE BV, 1990-02)The actinomycete Streptomycetes viridosporus attacks wheat lignocellulose releasing soluble lignin-rich fragments (APPL). Chemical analyses indicated that these APPL contain 20% less guaiacyl and 70% less glucose residues ...
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(SPRINGER/PLENUM PUBLISHERS, 2011-04)The slightly water-soluble flavonoid kaempferol (KAE) and its inclusion complexes with beta-cyclodextrin (beta CD), hydroxypropyl-beta-cyclodextrin (HP beta CD) or heptakis-2,6-O-dimethyl-beta-cyclodextrin (DM beta CD) ...
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(Stockton Press, 1990-01)The ability of the lignino-cellulolytic actinomycete Streptomycetes viridosporus T7A to attack purified fractions of kraft lignin was examined. In the presence of 0.3% yeast extract, high-molecular weight kraft lignin (MW ...
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(SPRINGER VERLAG, 1993-11)Methyl methacrylate and methyl acrylate were grafted onto chitosan by using potassium persulfate alone as redox initiator and in combination with MnCl2 and CuCl2, as inorganic, and both ammonium tartrate and oxalate as ...
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(PROUS SCIENCE, SA, 1998-03)Acetazolamide is recommended for the prophylaxis of acute mountain sickness symptoms which sets in on climbing to high altitudes (H) above 2,500 m. It is primarily excreted unchanged in urine. In a previous study, we ...
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(MARCEL DEKKER INC, 1996)A continuous flow injection reaction-stopped flow detection method using derivative spectrophotometry was developed for the determination of cobalt and iron in mixtures. A conventional two-channel flow injection manifold ...
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(ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS, 1996-05)An integrated retention/photometric detection method for the determination of microamounts of iron was developed. The method is based on the retention of the reaction product of the analyte with ferrozine in a flow cell ...
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(FRIEDR VIEWEG SOHN VERLAG GMBH, 1992-11)An automatic method based on the combination of a flow injection (FI) manifold with a liquid chromatograph has been developed for the enrichment and determination of transition metal ions in water samples. Alternatively, ...
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(MARCEL DEKKER INC, 1999)A simple flow injection photometric method for the determination of copper was developed based on the formation and liquid-liquid extraction of the analyte-bathocuproine-perchlorate ternary complex. The analytical reaction ...
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Studies on quinones.209 a convenient approach to the synthesis of 2-acetonylpyranonaphuthoquinones (MARCEL DEKKER INC, 1990)a SHORT AND EFFICIENT SYNTHESIS OF 2-ACETONYLPYRANONAPHTHOQUINONES (13 AND 14) STARTING FROM MICHAEL ADDUCT 5 IS DESCRIBED
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(MARCEL DEKKER INC, 1992)The synthesis of pyranoquinone 9 starling from hydroxyquinone 4 through Michael adduct 5 is described.
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(MARCEL DEKKER INC, 1992)The synthesis of pyranoquinone 6 and its application to the elaboration of pyranonaphthoquinone 1b is described.
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(PORTLAND PRESS, 1995-06)Laccase is one of the ligninolytic enzymes found in liquid cultures of the fungus Ceriporiopsis subvermispora in defined medium. As an approach to a clarification of the role of laccases during the attack on lignin by the ...
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(GEORG THIEME VERLAG, 1999-12)The effective synthesis of a variety of bisthiourea-bridged calix[4]arenes substituted by carbohydrates units (D-glucose, D-mannose, D-galactose and lactose) at the narrow rim by reaction of bis(aminoethoxy)calix[4]arene ...
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(HETERO CORPORATION, 2000-03)Several new 6-amino- and 6,8-dinmino-4-aryl-2,3-dihydropyrimido[4,5-b][1,4]diazepines were obtained from the reaction of 4,5,6-triaminopyrimidine 1a and 2,4,5,6-tetraaminopyrimidine 1b with one equivalent of 3-dimethylam ...
