The effect of titanium dioxide as a semiconductive additive and barium titanate as a highly polar additive on the d.c. transient currents in low density polyethylene is investigated. Experiments were made using thick specimens under high electric field ( > 25 x 106 V/m) and constant temperature of 40OC. Results indicate that the incorporation of the foresaid additives has a remarkable effect on...

The production of lipase from Pseudomonas putida 922 was optimized by modifying various physical parameters such as carbon source, nitrogen source, pH, salt concentration and biochemical parameters of the production medium such as temperature and incubation time of the growth medium. Oil cakes were also used as carbon source to check for an increased production of the enzyme. The bacterium was ...

ABSTRAKSalah satu faktor yang dapat mempengaruhi efisiensi panel surya adalah suhu pada modul surya. Efisiensi akan menurun seiring dengan naiknya Oleh karena itu, dibutuhkan suatu mekanisme pendinginan sistem untuk meningkatkan Pada penelitian ini, dirancang sebuah metode penyemprotan air dan pengontrolan air. Jika telah mencapai 40oC, pompa terdapat bak penampungan bekerja mengalirkan ke perm...

The capability of the plant pathogenic fungus Myrothecium verrucaria to produce extracellular hydrolytic enzymes in submerged cultures was studied using several substrates. The fungus was able to produce different depolymerases and glycosidases, being xylanase, pectinase and protease the most important. Lipase was found in cultures developed in the presence of olive oil, while protease activity...

Multistage heat pump drying of macadamia nut under modified atmosphere was studied to improve the drying process and quality of the nuts. Conditions of study included drying temperature of 40-60°C, using nitrogen and normal air as drying medium. Drying kinetics and quality of nuts (moisture content, aw, rancidity and colour) as well as energy consumption of all drying processes were examined. T...

A Young Boy With High Fever and Lethargy A 5-year-old boy is brought to the emergency department (ED) by his parents. They report that, for the past week, the child has had a high fever (temperature up to 40oC [104oF]), generalized weakness, lethargy, and lack of appetite. The boy’s eyes are bloodshot and he has refused food and drink. The child has no history of cough, shortness of breath, hem...

This paper presents a new CMOS differential voltage-to-frequency converter (VFC) which targets front-end sensor interfacing in wireless sensor network applications. The proposed VFC, designed in a low-cost 0.35 μm CMOS technology supplied at 3 V, achieves high performances: power consumption below 0.3 mW, 0 2V differential input range operation and nonlinearity error less than 0.3 %. Thanks to ...

The effect of heat shock (40oC, 3 h) on the photosynthetic activity of 4-, 7and 11-day-old barley seedlings was studied. The rate of CO2 gas exchange in young leaves was not changed under heat shock while in 11-dayold seedlings the high temperature affected both the average quantum yield and the shape of light response curves of photosynthesis. Nevertheless, in chloroplasts of young heated leav...

Penelitian ini bertujuan untuk melihat hubungan kondisi udara masuk terhadap keluaran air cooler. Selain itu juga mendapatkan nilai efektivitas rata Suhu divariasikan, tetapi memiliki kelembapan spesifik w yang sama. Proses penurunan suhu udara, terjadi pada saat melewati beberapa cooling pad permukaannya dialiri air. pendinginan diasumsikan berjalan secara evaporative cooling. dilakukan eksper...

Background: Tannases are enzymes that may be used in different industrial sectors as, for example, food and pharmaceutical. They are obtained mainly from microorganisms, as filamentous fungi. However, the diversity of fungi stays poorly explored for tannase production. In this article, Aspergillus ochraceus is presented as a new source of tannase with interesting features for biotechnological a...