Chicken eggshell waste is a promising source of CaO which can be converted into heterogeneous catalyst materials. The purpose this study was to utilize derived from breed chicken produce biodiesel cooking oil through the transesterification process. A total 4 g material mixed with 200 and 60 methanol, then mixture stirred at speed 700 rpm for 6 h ± 40C. produced analyzed using GC-MS elucidate v...

Pendahuluan: Minuman kemasan jambu biji merah memiliki kandungan vitamin C. Vitamin C atau asam askorbat mempunyai sifat yang dapat larut dalam air dan teroksidasi. Faktor mengoksidasi C, seperti suhu pH. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh penyimpanan terhadap kadar minuman dijual di kota Bekasi. Metode: Metode digunakan analisis kualitatif kuantitatif. Analisis menggun...

Polar amplification of global warming has led to an average 2C rise in air temperatures in parts of the 14 polar regions in the last 50 years. Poikilothermic ectotherms that are found in these regions, such as 15 Collembola and mites, may therefore be put under pressure by changing environmental conditions. 16 However, it has also been suggested that the thermal sensitivity of invertebrates dec...

Understanding the response of bacterial communities to environmental change is extremely important in predicting the effect of biogeochemical modifications in ecosystem functioning. The Cuatro Cienegas Basin is an ancient oasis in the Mexican Chihuahuan desert that hosts a wide diversity of microbial mats and stromatolites that have survived in extremely oligotrophic pools with nearly constant ...

Br-doping Li4Ti5O12 microspheres (LTOS) with micro-nano hierarchical structure are synthesized using cetyltrimethylammonium hydroxide-assisted hydrothermal and further calcination. The morphology of the obtained LTOS were characterized by X-ray diffraction, scanning electron microscopy photoelectron spectroscopy. It is found that spherical spinel-type microstructure do not change after appropri...

The carbonic anhydrase (CA: Carbonate hydrolyase: E.C.4.2.1.1) content from the leaves and flowers of mature yarrow (Achillea millefolium), a plant believed to possess healing qualities, was purified and characterized. The purification levels were 35.58 fold in the leaves and 40.21 fold in the flowers. The optimum temperatures were 25C and 40C for the leaves and flowers, respectively, and optim...

of reduced glutathione was detected and this decrease was fo11owed by a decrease in leyels of glucose 6-phesphate. When twigs that contained depressed leyels of reduced glutathione and glucose-6-phosphate were transferred to 40C, oyercompensation for the decrease in reduced glutathione and glucose-6-phosphate occurred and the resultant surplus appeared to reflect the metabolic dysfunction in th...

Experiments were designed to determine the rate of gain of heat-tolerance for three different groups of goldfish, Carassius auratus, respectively acclimated to 4°C., 12°C., and 20°C., and subsequently moved to a temperature S°C. higher. The rate of change of heat-tolerance showed a marked difference in the three greups, twenty or more days being required for complete acclimation in the 40C. gro...

The anti-bacterial property and preservative nature of honey has been studied by evaluating the role of hydrogen peroxide in these properties, against bacterial strains isolated and identified from pasteurized milk samples. The antibacterial property of honey examined by agar incorporation assay and turbidometry, indicated a concentration dependent inhibition of bacterial growth in all catalase...