A bacterium, MAN-511 that produced extracellular mannanase, was isolated and identified as Bacillus subtilis on the basis of 16S rDNA phylogenetic analysis. The enzyme was purified to apparent homogeneity by precipitasi ammonium sulfat 70% and Sephadex G-75 chromatography procedures. The mannanase was purified 7.6 fold and specificity of 9.3 U/mg protein. SDS-PAGE of the purified enzyme showed ...

The present work describes an experimental investigation concerning the determination of viscosity behavior with shear rate and temperature of edible oils: canola; sunflower; corn; soybean and the no edible oil: Jatropha curcas. Besides these, it was tested a blend of canola, corn and sunflower oils as well as sunflower and soybean biodiesel. Based on experiments, it was obtained shear stress a...

The present paper is a numerical and experimental comparative study of hermetic and semi-hermetic reciprocating compressors working with carbon dioxide as fluid refrigerant against the conventional R134a hermetic compressors. When cooling conditions for one-stage compressor type (i.e., evaporation temperatures between 7.2oC and –10oC) have been considered, the numerical and experimental results...

A liquid medium containing wheat bran, salts and a source of inducer (pectin) was found to be suitable for the production of exoand endo-polygalacturonases by Aspergillus oryzae CCT3940. Induction of polygalacturonases by purified pectin was significantly higher than when rinds of citrus fruits were used as inducer. A. oryzae growth was favoured by pH close to 4, although a drop of pH to around...

Background: Accelerated ageing causes seeds to deteriorate that affect the seed quality of groundnut seeds. Seed deterioration will cause metabolic and chemical changes viz., lipid peroxidation autoxidation, leading loss membrane integrity enzyme activities. These are associated with reduced germination vigour. Methods: The cv. VRI 8 was subjected for accelerated at 40oC 100% RH upto 11 days ev...

The hybrid nanofluid's synergetic effect is proportional to the mixing ratio. However, One Factor at A Time (OFAT) method only displays optimised ratio when used in respective experiments specified. Thus, purpose of this study optimise nanoparticle using Design Experiment (DOE) Expert 11 cover entire range ratios with fewest possible. prepared nanofluid comprises Titanium Dioxide (TiO2) and Gra...

During the nineteenth century, when steadystate cosmological theories were in vogue, Lord Kelvin, Svante Arrhenius, and other eminent scientists believed that the transfer of life from one planet to another was a process made inevitable by the infinite extent and duration of the universe. This hypothesis, known as panspermia, subsequently fell out of favor, partly as a result of the acceptance ...

Spent lube oils are continuously generated from factories, vehicles and other machineries. Most spent engine oil contains harmful substances such as heavy metals indiscriminate disposal of this causes environmental pollution. The recycling has also become important due to its economic benefits. In study, solvent extraction clay percolation techniques were used recycle oil. specific gravity, fla...

Tuna contains high protein so that it fulfills the nutritional needs of human body. is a marine fish omega 3, vitamins, and minerals. This study aims to determine effect freezing technique tuna (Euthynnus affinis) on organoleptic at PT.Aceh Lampulo Jaya Bahari using temperature -30oC -40oC with time about 8 - 12 hours. Methods used qualitative method consisting research first influence comparis...

Dehydrofreezing is a food freezing method in which the foods are partially dehydrated before freezing. In this study, carrots were frozen with convective (-30, -35, -40oC and 2 m/s airflow) cryogenic methods after dehydrating them by different (osmotic dehydration, vacuum drying). The effects of dehydration method, conditions storage time on β-carotene amounts dehydrofrozen changes content duri...