The research about “The Effect of Variation of the Type of Acid on Gelatine Yield from Cakalang Fish Bone (Katsuwonus pelamis)”. The aim of this research was to determine the higher gelatine rendament using various of type of acid. This research used Completely Randomized Design (CRD), each treatment was done in duplo.The acid variation in this research were Chloride, Sulphate, Phosphoric, Acetic, Oxalate and Citrate acid respectively. The result showed that the highest rendament was 14,658% at 5% of phosphoric acid. The analysis of the treatment has fulfilled the standard. Keywords : Gelatine, Cakalang fish bone, Isolate, Yield
The investigation about the utilization of Banana peel (Musa paradisiaca) as biosorbent Rhodamine B dye has been done The purpose of this study was to determine the maximum contact time and to determine the adsorption capacity of kepok banana peel. Completely randomized design (CRD) was used in this research with two variables (the contact time and Rhodamine B concentration. Both variables were done in five levels i.e 10, 30, 60, 90, and 120 min and 2, 4, 6, 8 and 10 ppm respectively. The result showed that the maximum concentration of banana peel in adsorbing Rhodamine B was 6 ppm with 120 of contact time, and Rhodamine B adsorption capacity was 4.55mg/g.
Keywords: Banana peel, Rhodamine B, biosorbent
Telah dilakukan sintesis polieugenol dan karakteristiknya dari eugenol menggunakan katalis H2SO4 – CH3COOH. Sintesis dilakukan dengan cara polimerisasi kationik dengan perbandingan eugenol dengan katalis H2SO4 – CH3COOH adalah 4:1. Dalam penelitian ini polieugenol diperoleh dari proses sintesis dan ditentukan berat molekulnya dengan metode viskometri serta karakteristiknya. Hasil penelitian menunjukkan berat molekul 776.247,12 g/mol. Karakteristik polieugenol berbentuk padat, berwarna coklat dengan titik leleh 84oC – 90 oC. Tidak larut dalam air, n-heksan, benzena tetapi larut dalam etanol, etil asetat dan kloroform. Produk sintesis memiliki konduktivitas 176,4 volt dengan kekuatan arus listrik 0,05 A dan 16,80 ohm.Kata Kunci : Eugenol, polimerisasi kationik, polieugenol
Salah satu upaya untuk menjaga lingkungan tetap bersih, sehat, dan bebas dari paparan virus corona adalah dengan melakukan penyemprotan cairan desinfektan. Pemerintah senantiasa menghimbau masyarakat agar dapat membuat desinfektan secara mandiri di rumah. Akan tetapi, masyarakat di Desa Suruang, Kecamatan Campalagian, Kabupaten Polewali Mandar masih banyak yang belum mengetahui cara membuat desinfektan, kalaupun masyarakat ada yang tahu membuat desinfektan pada umumnya mereka hanya sekedar mencampur bahan kimia tanpa mengetahui kandungan senyawa di dalam botol kemasan, bagaimana sifat senyawa tersebut dan bagaimana takaran tepatnya. Akibatnya, pencampuran bahan kimia tersebut justru dapat berdampak negatif bagi mereka seperti pembentukan senyawa baru yang berbahaya bagi kesehatan mereka. Olehnya itu, kegiatan dalam wujud edukasi tentang pembuatan desinfektan sangat perlu dilakukan.
In this work, sensitivity, optimal control, and cost-effectiveness of several intervention strategies of filariasis are discussed. We study the intervention strategies that are related to bednet use, insecticide, and the combination of bed-net use and insecticide. We use Pontryagin’s maximum principle to characterize the optimal controls. The Average Cost-Effectiveness Ratio (ACER) and Infection Averted Ratio (IAR) are used to identify the most cost-effective strategy. We also determine the basic reproduction number and investigate the sensitivity of the basic reproduction number on the parameters that are related to bed-net use and insecticide. Based on the ACER values, the most cost-effective strategy to control filariasis is insecticide intervention. On the other hand, the IAR values indicates that bed-net use intervention is the most cost-effective strategy. Furthermore, it is also the most effective strategy to eliminate filariasis. The sensitivity analysis results show that the control parameter related to bed net use and treatment have a central role in reducing the basic reproduction number and filariasis spread.
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