Cell extracts from car mutants of Phycomyces blakesleeanus, which can convert '4C—labelled mevalonic acid into unsaturated carotenes, were treated with high ionic strength buffer and a range of detergents in an attempt to solubilise the carotenogenic enzymes. Phytoene synthetase was dislodged from the membrane with high molarity Tris-HC1 buffer, but the enzymes which convert phytoene into s—car...

The different genetic markers of pneumococcal transforming DNA are inactivated in solution at characteristic temperatures, analogous to melting points. These temperatures are spaced sufficiently to permit inactivation of the lower melting markers while the others are preserved intact.' Such partially inactivated DNA has been considered to be a mixture of native and denatured molecules.1 If this...

The solubility of cellulase extracted from the abscission zones of citrus leaf explants (Citrus sinensis L. Osbeck) in sodium phosphate buffer depends on the pH of the extracting solution and, to a lesser extent, on the ionic strength. By increasing molarity from 0.01 to 0.16, the solubility of cellulase increased from 51% to 89% at pH 6.1 and from 70% to 98% at pH 7. In all cases, residual cel...

An study to produce cellulose nanocrystals (CNCs) from oil palm empty fruit bunch (OPEFB) was presented through hydrothermal proses and sonication pretreatment. The influence of molarity, reaction time acid ratio were studied the yield, crystallinity, chemical structure resulted CNCs. Hydrolysis at temperature 110°C using catalyst hydrochloric 1 M, with hour, 2 hour 3 hour. highest yield up 48,...

The purpose of this study was to investigate the relationship between molarity and workability in Self-Compacting Geopolymer Concrete (SCGC), as well mechanical properties. Compressive strength split tensile tests are used characterize characteristics research. Additionally, investigates optimal for self-compacting geopolymer concrete. Fly ash lieu cement On new concrete geopolymer, is determin...

The Turner 210 spectrofluorometer was used for fluorescence mea;;urements. The Cary model 15 spectrophotometer was used to obtain absorption and difference spectra. A Cary 60 spectropolarimeter, equipped with a Pockels cell, was used to measure circular dichroism. Solutions had optical densities, in the wave length region of measurement, below 2.0. The data are reported as mean residue elliptic...

<p>Permanent damages and spalling occur in conventional concrete due to high temperatures. Also loses its compressive strength amounting about 50 75% of the original as reported most research works. As opting for grade leads higher costs emits CO2, an attempt develop thermal-resistant geopolymer is done. A new class silica-alumina binders called geopolymers has ability withstand Generally...

Aqueous NaOH with ethanol (strong) etchant is widely used. It shortens etching time effectively compared to normal conditions (6.25N at 70 °C). Two equations have been proposed calculate the molarity and volume. Another two empirical were introduced for estimating bulk etch rates of PADC etched in strong etchant. Up now, there no such available literature that can predict V b volumes. The funda...