Sesame and groundnut are important crops and a source of edible oil and protein. Amino acid content of both meals was analyzed and studies made on the protein solubility of defatted sesame and groundnut meal in aqueous solution over various pH and in various salt solutions. Valine, isoleucine, arginine, aspartic acid and glutamine were present in high concentration in both the defatted meals. A...

Double-barrel ion-sensitive microelectrodes were used to measure activity-related changes in extracellular pH (pHe), potassium and calcium concentration ([K+]e and [Ca2+]e) in the spinal dorsal horns of frogs. Repetitive stimulation (30-100 Hz) of the dorsal root evoked transient acidification in the lower dorsal horn by 0.25 pH units, which was accompanied by an increase in [K+]e by 4-5 mmol/l...

1. The hydrolysis of gelatin at a constant hydrogen ion concentration follows the course of a monomolecular reaction for about one-third of the reaction. 2. If the hydrogen ion concentration is not kept constant the amount of hydrolysis in certain ranges of acidity is proportional to the square root of the time (Schütz's rule). 3. The velocity of hydrolysis in strongly acid solution (pH less th...

Background In tissue engineering, scaffold characteristics play an important role in the biological interactions between cells and the scaffold. Cell adhesion, proliferation, and activation depend on material properties used for the fabrication of scaffolds. Objective In the present investigation, we used collagen with proper characteristics including mechanically stability, biodegradability ...

The following facts have been established experimentally. 1. In the presence of the synthetic detergent, Duponol PC, there is a definite reaction between dilute ferricyanide and denatured egg albumin. 0.001 mM of ferrocyanide is formed by the oxidation of 10 mg. of denatured egg albumin despite considerable variation in the time, temperature, and pH of the reaction and in the concentration of f...

The normal and differential titration curves of liganded and unliganded hemoglobin were measured at various KCl concentrations (0.1 to 2.0 M). In this range of KCl concentrations, the curves for deoxyhemoglobin showed no salt-induced pK changes of titratable groups. In the same salt concentration range oxyhemoglobin showed a marked change in titration behavior which could only be accounted for ...

Those bacteria that cause the reddening of salted hides and salted fish, commonly designated as halophiles, grow more luxuriantly in laboratory media as the salt concentration increases from about 3 molar to saturation. This stimulative effect of sodium chloride has been observed and reported by Clayton (^)/ Robertson (6), Lockhead (5), and Stuart and James (13), Halophilic bacteria also have b...

A neutron activation analysis method with pre-irradiation separation and post-irradiation purification is presented for the determination of 129I content and 129I/127I ratio in some environmental samples, such as seawater, seaweed, grass and soil. An evaporation concentration followed by solvent extraction was used for the separation of iodine from seawater, and alkaline ashing or alkaline fusi...

BACKGROUND This study was performed in an attempt to assess serum calcium, phosphorus, and alkaline phosphatase in adolescent girls and calcium supplementation in subjects with abnormal serum findings. METHODS A randomized, cross-sectional, cluster sampling, prospective, and descriptive trial was conducted from January through March 2003 for measurement of serum calcium, phosphorus, and alkal...