5 research outputs found

    Online Monitoring Kualitas Air Pada Budidaya Udang Berbasis WSN Dan IoT

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    Dalam tulisan ini dijelaskan desain dan pengembangan sistem online monitoring kualitas air berbasis wireless sensor Network (WSN) dan Internet of Things (IoT). Sistem ini didesain dan dikembangkan untuk memantau parameter DO (Dissolved Oxygen), pH, conductivity dan temperatur pada budidaya udang. Sistem terdiri dari beberapa node sensor dengan komponen utama arduino uno yang terhubung dengan Xbee board dan master board dengan komponen utamanya adalah Raspberry Pi 2 (RPi2) board dan Xbee. Data dikirim dari masing-masing node ke RPi2 menggunakan jaringan WSN dengan paket data yang dilengkapi dengan masing-masing ID, setelah itu data disimpan di database internal RPi2 dan ditampilkan di graph. Timer update server digunakan untuk update data dari RPi2 ke server menggunakan jaringan internet melalui wifi. Data di server dapat dilihat menggunakan website, selain itu juga data dapat dilihat pada aplikasi Telegram Messenger yang ter-install di perangkat ponsel. Program RPi2 dikembangkan menggunakan bahasa python dan komponen matplotlib. Hasil percobaan menunjukkan bahwa sistem memiliki prospek yang besar dan dapat digunakan untuk keperluan budidaya udang dengan memberikan informasi yang relevan dan tepat waktu. Data hasil pengumpulan tersebut dapat digunakan untuk penelitian dan analisa lebih lanjut

    The Use of Tragacanth as a Gelling Agent in Roselle Flower Extract based Radiochromic Indicators

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    Gamma irradiation techniques have been used in various fields, such as sterilizing medical equipment and food products. In such a process, monitoring the dose of radiation using radio radiochromic dosimeter is important to guarantee the accuracy of the radiation dose absorbed by the irradiated materials. Radio chromic dosimeters usually consisted of radiation-sensitive dyes that could change colors when exposed to radiation. In this research, natural dyes in the form of anthocyanins obtained from roselle flower extract (Hibiscus sabdariffa L.) have been used as radio chromic indicators. The radio chromic indicators have been made in liquid using water solvent and gel using a tragacanth gelling agent. Each radiochromic indicator's pH values varied between 2 and 11 using NaOH and HNO3 solutions. All radio chromic indicators were then gamma irradiated using a Co-60 radiation source and tested for stability at 8°C under closed storage conditions. The characterization was performed using UV Vis spectrophotometry. The results showed that roselle flower extract was sensitive to gamma radiation as indicated by decolorization, and their sensitivity increased when made in the form of gel at pH 2 and 5. The stability test also showed that the anthocyanin content was stable after being maintained for 28 days in a closed storage at 8°C. With such differences in sensitivity of the roselle flower extract when used in either liquid or gel solution, the radio chromic indicators should find wide application in the future, depending on the radiation doses given to the solutions
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