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All Journal PROSIDING SEMINAR NASIONAL Setrum : Sistem Kendali-Tenaga-elektronika-telekomunikasi-komputer
Dwi H
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STUDI AWAL PROSES INAKTIVASI ENZIM LIPOKSIGENASE UNTUK PRODUKSI TEPUNG BIJI KECIPIR SEBAGAI BAHAN BAKU TEPUNG KOMPOSIT M Endy Y; Dwi H; Fahmi A; Indah H; Erlangga -; Ndaru Okvitarini; Fiqih Putri J
PROSIDING SEMINAR NASIONAL & INTERNASIONAL 2010: Bio Molekuler, Analis Kesehatan, Keperawatan
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3752.432 KB)

Abstract

Soybean is known as source of protein. Soybean is also rich of nutrition such as minerals, vitamin B, complex carbohydrate and food fiber. Nevertheless central java is still lack of soybean. Winged bean (Psophocarpus tetragonolobus L) which its nutrition content is similar with soybean, is expected as the substitute of  soybean. Winged bean can be used as source of protein by transforming it into composite flour which can be used as food product or edible film in food packaging. The usage of winged bean is limited, such as in tofu production. This is caused by strong bitter beany flavour of winged bean. The beany flavour is caused by the conversion of unsaturated fatty acid especially linoleate that catalyzed by lipoksigenase. In order to avoid the beany flavour, it’s urge to find an appropriate method which able to extract the oil of winged bean in the low or zero activity of lipoksigenase. In order to avoid the conversion of hydroperoxide fatty acid, we need to develop an effective extraction method which inactivate the lipoksigenase and also separate the unsaturated fatty acid in winged bean. This research is used to develop process scheme of winged bean’s oil thermal extraction, so we can produce flour of winged bean which is free of bitter beany flavour. The research was begins by designing and fabricate the enzimatics inactivation extractio, and followed by study the thermal extraction process parameter. The parameters of enzymatic inactivation extraction were ethanol concentration (75 – 95%) and  pH (3-6). The samples of each variable were analyzed by using Ultra Violet Spectrophotometer. The Bio-extractor has been developed with multifunction, which were inactivating the lipoksigenase and extract the oil of winged bean. The higher solvent concentration, the unsaturated fatty acid concentration is lower, but at higher pH, the unsaturated fatty acid concentration is higher also. Keywords: enzyme, flour, inactivation, winged bean
Perencanaan Penempatan Antena Pemancar Wireless Indoor Berdasarkan Daya Terima Dwi H
Setrum : Sistem Kendali-Tenaga-elektronika-telekomunikasi-komputer Vol 6, No 1 (2017): Edisi Juni 2017
Publisher : Fakultas Teknik Elektro - Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1079.689 KB) | DOI: 10.36055/setrum.v6i1.1736

Abstract

Abstrak – Kualitas suatu sinyal dapat diketahui dari daya yang diterima. Semakin tinggi/kuat daya terima, maka semakin baik kualitasnya dan begitu sebaliknya. Dalam komunikasi wireless yang berkembang saat ini, antena pemancar memiliki peranan penting terhadap kualitas sinyal. Perlu dilakukan perencanaan penempatan antena pemancar dengan memperhatikan level daya terima disetiap perangkat/antena penerima. Disini dilakukan simulasi menggunakan RPS pada suatu ruangan berisi komputer yang akan mengganti jaringan kabel LAN menjadi wireless LAN. Dari lima antena pemancar, yang direncanakan dimana diposisikan ditengah dan disetiap pojok ruangan pertama, ternyata penempatan antena pemancar terbaik yaitu pada posisi di tengah ruangan. Daya terima terbaik sebesar -28,87804 dBm dengan rata-rata daya terima sebesar -40,38082 dBm dan penerima yang mendapatkan sinyal terbaik berjumlah 14 antena penerima.Abstract – The signal quality can be known from the received power. The higher/stronger the power received, the better the quality and vice versa. In today's growing wireless communications, transmitting antennas have an important role for signal quality. Planning of the transmitting antenna is required by taking into account the receiving power level in each receiving/antenna device. This paper simulates received power for typical indoor using Radiowave Propagation Simulator (RPS). Simulations performed on Computer room that will replace the wired LAN network to a wireless LAN. It is planned that five transmitting antennas are positioned in the center and in every corner of the first room. The system performances shown the best transmitting antenna is in position in the center of the room. The best received power is -28,87804 dBm with average receive power -40,38082 dBm and receiver that gets the best signal is 14 receiving antenna
Co-Authors Erlangga - Fahmi A Fiqih Putri J Indah H M Endy Y Ndaru Okvitarini