This paper shows the characteristics of temperature and adsorbed (water vapor) mass rate distribution in adsorber unit which is key part to any adsorption refrigeration system. The profiles adsorption/desorption phases (Dynamic Sorption) are measured experimentally under operating conditions 90oC hot water temperature, 30oC cooling 35oC cycle time 40 min. Based on profiles, transfer equations f...

The results of an experimental study the effect pressure drop air filter pf on operat-ing parameters and exhaust emissions a modern CI internal combustion engine truck equipped with electronically controlled power system are presented. tests were carried out for clean cartridge Δpf0 = 0,58 kPa contaminated after service mileage (about 50 thousand km) ΔpfD 2,024 kPa. In each test, performance, r...

This study aimed to develop and compare growth models of Bacillus cereus in cooked fried rice. A cocktail B. was inoculated into rice obtain an initial concentration ca. 2 log CFU g-1 stored at 13, 30, 42, 60oC. The cell during storage were fitted the primary Baranyi, Huang, modified Gompertz. maximum specific rates (µmax) Ratkowsky model, while lag phase using first-order polynomial model. The...

abstract: kefir is fermented milk that has a unique flavor because of acetaldehyde, diacetyl, acetoin and ethanol. the aim of this study was to evaluate flavor and aroma compounds present in kefir. two types of starter (christian hansen and sacco) and three levels of temperatures (30, 33 and 35oc) were used for the preparation of kefir samples. the samples were analyzed for acetaldehyde, diacet...

the removal of disulfide oil (dso) from contaminated soil was studied by the bioremediation method and the influence of electrokinetic on the bioremediation process was investigated. the bacillus subtilis strain was used in the bioremediation process. the effects of humidity, time and dso concentration in soil was studied. the experimental results for the bioremediation of dso show, the removal...

Nghiên cứu được thực hiện với mục đích phân lập và tuyển chọn nấm men Saccharomyces cerevisiae (S. cerevisiae) định hướng sản xuất probiotics dùng trong chăn nuôi. Kết quả nghiên đã 32 chủng từ 52 mẫu chất chứa ruột gà khoẻ mạnh. Dựa vào đặc điểm hình thái, sinh hóa danh bằng phương pháp khuếch đại vùng gen ITS xác 3 (Y35, Y63, Y100) thuộc loài S. cerevisiae. Ba này sàng lọc thêm các tính khác ...

The decomposition of organic matter is a major biogeochemical process because of its effect on ecosystem productivity and its implications on climate change. Temperature and moisture are two variables that have a tremendous influence on microbial decomposition. Decomposition is also influenced by substrate type, in which higher quality substrates often have greater decomposition than lower qual...

Melanin is nearly a ubiquitous pigment synthesized by living organisms in the course of hydroxylation and polymerization of organic compounds. Melanins have immense application potentials in the field of agriculture, cosmetics and pharmaceutical industries (photoprotection and mosquitocidal activity isolated from Streptomycete). In this study, the halophilic black yeast, Hortaea werneckii produ...

The control measures for deterioration of aerobic activated sludge were experimented. Wastewater samples with different pH, temperature, SVI, and MLSS were investigated to detect the cause of sludge deterioration. The results show that after being operated at high S2O3 2(which could lead to a pH decrease) loading in an A/O biological reactor treated for coking wastewater, though the pH was cont...

Catalase activity of the sulfate-reducing bacteria Desulfovibrio piger Vib-7 and Desulfomicrobium sp. Rod-9 isolated from the human large intestine was studied. The high activity of the enzyme in cell-free extracts of both bacterial strains was determined (1745.21154.67 and 873.1172.23 U×mg protein for D. piger Vib-7 and Desulfomicrobium sp. Rod-9, respectively). The effect of different tempe...