Prevention of Dengue Hemorrhagic Fever (DHF) Associated with the Aedes Aegypti Larvae Presence Based on the Type of Water Source

Aedes aegypti is the vector of Dengue Hemorrhagic Fever (DHF) disease. Containers are breeding places for DHF vector and the most commonly found larvae in the bath water containers. The presence of Aedes aegypti larvae in a container could be affected by the type of water source besides the container\u27s color, material, location, lid existence and the container\u27s drain frequency. This study was conducted to determine the associate of water source type with larvae presence and the additional factors. This study used observational analytic with case control design. The case group consisted of households using well water and the control group consisted of households using tap water with a sample size of 130 households for each group. The sample was collected by proportional random sampling in five villages. The data was analyzed using a regression logistic test. The significant variables associated with the presence of larvae were the water source type (OR=1.923), container\u27s color (OR=2.345), container\u27s location (OR=2.241), container\u27s lid existence (OR=2.122) and the container\u27s drain frequency (OR=2.260). This study did not consider the significant association of the container\u27s material. The dominant variable associated with the presence of larvae was the container\u27s drain frequency which was controlled by the water source type, container\u27s color and container\u27s location

Efisiensi Motor Induksi 3 Sebagai Generator Induksi 3

Motor induksi 3phase pada umumnya digunakan sebagai motor penggerak beban dalam bidang industri. Dalam kondisi tertentu, motor induksi 3phase dapat digunakan sebagai penghasil daya atau pembangkit daya listrik. Analisa efisiensi motor induksi 3phase sebagai generator induksi 3phase (MISGI) ditinjau dengan melihat karakteristik dari motor induksi sebelum dioperasikan sebagai generator induksi 3phase dan sesudah dioperasikan sebagai generator induksi 3phase. Analisa perhitungan efisiensi dilakukan dengan menggunakan program matlab . Efisiensi daya meningkat sebanyak 12 kali dari daya motor. Faktor daya dan daya output meningkat dengan meningkatnya kecepatan putar. Untuk dapat beroperasi sebagai generator, kecepatan putar rotor motor induksi 3phase harus diatas kecepatan sinkronnya

Penetapan Kadar Flavonoid Total Ekstrak Etanol Kulit Buah Alpukat (Persea Americana Mill.) Dengan Metode Spektrofotometri Uv-vis

Avocado plant (Persea americana Mill.), belongs to Lauraceae family which have medicinal properties. Avocado peel contains flavonoid compounds that can be used to protect and reduce the skin damage against UV rays. This study aimed to determine the total flavonoids content of the ethanol extract of the avocado peel using UV-Vis spectrophotometry. The ethanol extract of avocado peel was obtained by maceration with ethanol. The qualitative analysis used FeCl3 by forming green complex. The determination of total flavonoids content is conducted based on AlCl3 method with total flavonoids expressed in QE (Quercetin equivalent) at the maximum wavelength of 435 nm. The result showed that the average content of flavonoid total is 4.0122 mgQE/g extract