The effect that application of nitrogen-phosphorus (NP) rates exerts on some parameters of nitrogen metabolism and on yield in aubergine plants (eggplant, Solanummelongena cv. Bonica) was studied. All plants were grown under controlled conditions in an experimental greenhouse. The treatments consisted of the combination of three rates of N in the form of KNO3 (N1: 15 g m-2, N2: 22.5 g m,-2 and ...

Low cost activated carbon, prepared from saw dust of Ziziphus jujube by chemical activation with phosphoric acid (H3PO4) was characterized and utilized for the removal of Cr (VI) ions from aqueous solutions under different conditions of solution pH, contact time, initial concentration, carbon dose and temperature. Adsorption of Cr (VI) ions was found highly pH dependent that increased with decr...

Gaucher disease is a sphingolipidosis that leads to an accumulation of glucosylceramide. The objective of this study was to develop a methodology, based on the extraction, purification and quantification of glucosylceramide from blood plasma, for use in clinical research laboratories. Comparison of the glucosylceramide content in plasma from Gaucher disease patients, submitted to enzyme replace...

This paper describes a versatile technique for amino-acid separation using a novel low-capacity sulfoacylated macroreticular polystyrene-divinylbenzene cation-exchange column with a simple binary high-pressure pH gradient elution. Proteinic 16 amino acids were well separated within 50 min using a H3PO4/Na2HPO4-CH3CN eluent system, and the cycle time was about 70 min. The chromatography with pos...

A high-performance liquid chromatographic method for the determination of ofloxacin and lomefloxacin in human plasma has been developed and validated. The effect of organic modifiers on the retention of the investigated drugs was investigated. A simple isocratic chromatographic assay with UV-detection at 280 nm was performed on a Hibar Lichrospher 100 RP 8 column (250 4.6 mm, 5 m. Merck, German...

The electrical and semiconducting properties of thin anodic passive films potentiostatically formed (1 V ≤ Ef ≤ 5 V vs. sce) on polycrystalline niobium electrodes in aqueous 0.5 mol/L H3PO4 solutions (pH 1.3) were studied, at room temperature, using electrochemical impedance spectroscopy. The data were analysed with a transfer function using a non-linear fitting routine, assuming that the resis...

Sabut kelapa merupakan limbah perkebunan yang kurang dimanfaatkan . Dalam bagian sabut memiliki kandungan lignin dan selulosa menjadi dasar bahwa bisa dijadikan karbon aktif. Tahapan dilakukan pada pembuatan aktif meliputi proses preparasi sampel, karbonisasi, pengayakan aktivasi menggunakan asam fosfat, kemudian uji terdiri dari sifat fisis, karakterisasi FTIR, XRD, SEM Adsorpsi. Variasi fosfa...

The performance of alkalis (NaOH and Ca(OH)2) and acids (H2SO4, HCl, H3PO4, CH3COOH, and HNO3) in the pretreatment of rice husk was screened, and a suitable reagent was assessed for subsequent optimization using response surface methodology. From the assessment, HCl that hydrolysed rice husk well was optimized with three parameters (HCl loading, pretreatment duration, and temperature) using Box...