Four new azo-dyes, 3-phenyl azopentane-2,4-dion (LA), 3-(4-nitro phenyl azo)-pentane-2,4-dion (LP), 3-(2-nitro phenyl azo)-pentane-2,4-dion (LO) and 4-(1-acetyle-2-oxo-propyl azo)-benzene sulfonate sodium (LS), were synthesized from, aniline, 4-nitroaniline, 2-nitroaniline and sulfanilic acid with acetylacetone, respectively. Reaction of these new dyes with acetate salts of copper(II), nickel(I...

ilver has good electric conductivity and solderability and possesses S excellent electric characteristics as a contact and is thus widely used for plating electronic industrial parts. A cyanide plating bath is most often used, but the cyanide compounds have strong toxicity and a large amount of the cost is rxpkd for securing safe working conditions and waste treatment. Because of this, many cya...

Pantai Pedelegan merupakan salah satu pantai kawasan wisata yang terletak di Kabupaten Pamekasan. Perairan Padelegan dekat dengan ekosistem mangrove, estuari dan berdekatan tambak garam. Ekosistem tersebut penunjang kesuburan perairan dapat diketahui dari kadar nutrient distribusi klorofil-a ada. Penelitian ini bertujuan untuk mengetahui nutrien biomassa fitoplankton serta hubungannya parameter...

A quantitative study o f the diazo reaction has been made with several bilirubins including a 2,3dihydrobilirubin and several phycorubins. The latter have been prepared from the integral phycocyanin of two cyanobacteria (Mastigocladus laminosus and Spirulina platensis), and from the phycocyanin subunits. These phycorubins have been subjected to the diazo reaction in order to test for the presen...

In the recent literature several chemical methods for the determination of thiamine are described. Some of these admittedly lack specificity (l-3). The determination of the blue fluorescence in ultraviolet light of thiochrome, one of the oxidation products of thiamine, has been most widely investigated (4-12). Its application to the quantitative determination of thiamine is complicated by simil...

The presence in testicle extracts of a factor enhancing the lesions produced by infectious agents was demonstrated by Duran-Reynals (1). Subsequently McClean (2) and Hoffman and Duran-Reynals (3) reported that testicle extract had the power to diffuse through certain tissues, especially the connective tissue of the skin. Extracts from other mammalian organs were found to have these properties, ...

The objective of this study was to determine whether nitric oxide (NO) is responsible for the vascular smooth muscle relaxation elicited by endothelium-derived relaxing factor (EDRF). EDRF is an unstable humoral substance released from artery and vein that mediates the action of endothelium-dependent vasodilators. NO is an unstable endothelium-independent vasodilator that is released from vasod...

Histochemical and ultrastructural studies demonstrate that keratohyalin can be mobilized from fresh specimens of cattle hoof epidermis by 1.0 M potassium phosphate buffer (pH 7.0). Macroaggregates with histochemical characteristics identical to those of in situ keratohyalin granules (staining by Harris' hematoxylin, Congo red, diazotized sulfanilic acid, sodium alizarin sulfonate, toluidine blu...

Alkaline phosphodiesterase I activity is demonstrable in lysates of mouse resident peritoneal macrophages (1.43 mU/mg), endotoxin-stimulated macrophages (1.36 mU/mg), and thioglycollate-stimulated macrophages (3.91 mU/mg), as well as in the lysates of several mouse cell lines. The enzyme showed little variation in culture, although serum deprivation caused a 50% decrease in enzyme activity. In ...