In this work, we present a novel ex situ modification of bacterial cellulose (BC) polymer, that significantly improves its ability to absorb water after drying. The method involves single inexpensive and easy-to-perform process BC crosslinking, using citric acid along with catalysts, such as disodium phosphate, sodium bicarbonate, ammonium bicarbonate or their mixtures. particular, the mixture ...

Hydrated salts (salt hydrates) are highly promising low-temperature phase change materials (PCMs) due to their high cohesive energy density and low cost. However, they exhibit separation, liquid leakage, inherent supercooling, which hinder applications in sustainable building technology. Here, we describe the design of a stable emulsion gel system (EmulGels) that exhibits nonflammable shape-mem...

Reducing the amounts consumed of organic solvents while keeping good chromatographic performance has been a significant step towards greening analytical methodologies. When sodium dodecyl sulfate (SDS) and Brij-35 surfactants are combined in mobile phase, they can be used as green alternative to modifiers. Surfactants have numerous advantages, including low cost toxicity, safe environmental dis...

1. Evidence is presented for the presence of pyridoxamine phosphate oxidase and a pyridoxal phosphate phosphatase in aqueous extracts of E8cherichia coli. 2. Spectrophotometric methods have been developed for the precise measurement of substrate and product concentrations in both enzyme systems. Specific activities of the order of 10-2 tumole/30 min./mg. ofprotein/ml. ofreaction mixture are rep...

The stereochemistry of dl-glycerol 3-phosphate was studied by X-ray-crystallographic techniques. All the bond lengths and angles are within normally accepted limits except the ester bond, which is one of the largest yet noted, being 0.1637nm. The conformation of the molecule is such that an intramolecular hydrogen bond is formed between the hydroxyl group on the beta-carbon atom and the phospha...

In this paper, we report a facile, rapid, and green strategy for the synthesis of cellulose/hydroxyapatite (HA) nanocomposites using an inorganic phosphorus source (sodium dihydrogen phosphate dihydrate (NaH2PO4·2H2O)), or organic phosphorus sources (adenosine 5′-triphosphate disodium salt (ATP), creatine phosphate disodium salt tetrahydrate (CP), or D-fructose 1,6-bisphosphate trisodium salt o...

A few years ago one of the authors (0. A. B.) and his colleagues described a relatively simple micromethod for the determination of alkaline phosphatase in serum (1). The method is based on the spectrophotometric measurement of the amount of p-nitrophenol (which absorbs light strongly at 400 mp) liberated from p-nitrophenyl phosphate under certain standard conditions and is simple and rapid to ...

The intended purpose of this work is to develop and validate a dissolution test for betamethasone acetate and betamethasone sodium phosphate injectable suspension using a reverse-phase liquid chromatographic method. After testing sink conditions, dissolution medium and stability of the drug, the best conditions were: flow through cell of diameter 22.6 mm, 2.0 ml per minutes flow rate for 120 mi...

The objective of the study was to develop a simple, specific and stability-indicating HPLC method for the simultaneous determination of creatine phosphate sodium (CPS) and its related substances in pharmaceutical formulation. Separation of creatine phosphate sodium from its major process impurities and degradation products was achieved on a Hypersil BDS C18 column (250 × 4.6 mm, 5 μm) with an a...