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All Journal SPIN: Jurnal Kimia & Pendidikan Kimia Indonesian Journal of STEM Education
Multazam Multazam
Universitas Islam Negeri Mataram
Chemistry Education Engineering Mathematics Physics

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ANALISIS TEORI ENERGI DESOLVASI ION NATRIUM PADA PELARUT ELEKTROLIT ORGANIK MENGGUNAKAN DENSITY FUNCTIONAL TIGHT BINDING (DFTB): THEORETICAL ANALYSIS OF DESOLVATION ENERGY SODIUM IONS IN ORGANIC ELECTROLYTE SOLVENTS USING DENSITY FUNCTIONAL TIGHT BINDING (DFTB) Ismiatul Hidayah; Multazam Multazam; Yahdi Yahdi; Aditya Wibawa Sakti
SPIN JURNAL KIMIA & PENDIDIKAN KIMIA Vol. 4 No. 1 (2022): Januari - Juni 2022
Publisher : UIN Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/spin.v4i1.5147

Abstract

Larutan elektrolit sangat berperan penting sebagai media transfer ion pada baterai. Transfer ion pada antar muka elektrolit dan elektroda dapat menentukan energi desolvasi dan konduktivitas ion. Tujuan penilitian ini adalah untuk mengetahui pengaruh variasi pelarut organik terhadap energi desolvasi lepasnya pelarut organik.  Penelitian ini menggunakan lima pelarut elektrolit organik yaitu Adiponitrile (APN), Acetonitrile (ATN), Butylene Carbonate (BC), Diethyl Carbonate (DEC), dan 1,4-Dioxa­ne (DIO). Parameter yang diamati adalah energi desolvasi menggunakan metode DFTB dengan program Dcdftbmd. Hasil analisis data twoway ANOVA diperoleh signifikansi kurang dari 0,05 dan Ha diterima yang berarti bahwa ada perbedaan yang nyata pada jenis pelarut elektrolit organik terhadap energi desolvasi. Untuk uji lanjut Post Hoc diperoleh bahwa terdapat perbedaan secara signifikan. Berdasarkan parameter yang diamati, dapat disimpulkan bahwa kelima jenis pelarut elektrolit organik memiliki pengaruh terhadap energi desolvasi. Energi desolvasi masing-masing pelarut organik cenderung meningkat seiring dengan semakin banyaknya pelarut organik yang lepas ikatannya dengan Natrium.   ABSTRACT Electrolyte is very important as an ion transfer medium in battery. Ion transfer at the interface between electrolyte and electrode can determine desolvation energy and ion conductivity. The aims of this study is to determine the effect of variations in organic solvent on desolvation energy of organic solvent. In this study, we were used five organic electrolyte solvents namely Adiponitrile (APN), Acetonitrile (ATN), Butylene Carbonate (BC), Diethyl Carbonate (DEC), and 1,4-Dioxa­ne (DIO). The parameter observed were desolvation energy using DFTB method with the Dcdftbmd program. The result of two way ANOVA data analysis obtained a significance of less than 0.05 and Ha was accepted, which means that there is significant difference between the type of organic electrolyte solvent and the desolvation energy. For the Post Hoc test, it was found that there was a significant difference. Based parameter observed, the five organic solvents have an influence on the desolvation energy. Each desolvation energy of organic solvents tends to increase along with the increasing number of organic solvents released of bond with Sodium.
Effect of Soaking in Natural Pesticides from Garlic Bulbs and Liquid Soap on The Mortality of Onion Caterpillars Nurul Hidayah; Yahdi Yahdi; Multazam Multazam
Indonesian Journal of STEM Education Vol. 6 No. 1 (2024): Edisi Januari-Juni 2024
Publisher : Indonesian Publication Center

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Abstract

Productivity of onion in Bima, West Nusa Tenggara (NTB), caused by rain and attacks from pests, has decreased significantly. One of the pests that often attack onion plants is armyworm (Spodoptera exigua Hubner) which causes 100% damage. To prevent damage, farmers use chemical pesticides to stop armyworm (Spodoptera exigua Hubner) attacks. The use of chemical pesticides has many negative impacts both in terms of the environment and health. To resolve this problem, utilize natural pesticides. Natural pesticides don’t have residual effects and are safe for health. The purpose of this study was to know the effect of natural pesticides garlic and liquid soap against the mortality of armyworms. The methods used are experimental research and a quantitative approach. The result of this study obtained the highest armyworm mortality at 9 days of immersion of 100% and the longer the immersion was carried out the higher the mortality rate of armyworm. Based on the analysis of One Way ANOVA, there was an effect of soaking time of natural pesticides against the mortality of armyworms with a significant value of 0.046.
Co-Authors Aditya Wibawa Sakti Ismiatul Hidayah Nurul Hidayah Yahdi Yahdi, Yahdi