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All Journal Sainstek : Jurnal Sains dan Teknologi Jurnal Altifani Penelitian dan Pengabdian kepada Masyarakat Journal of Multidisciplinary Science: MIKAILALSYS
Liza Devita
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Religion Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Education Environmental Science Languange, Linguistic, Communication & Media Nursing Physics Public Health Social Sciences Other

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STUDI MOLEKUL n2P2 DENGAN GRUP SIMETRI D~h MENGGUNAKAN METODE AB INITIO Devita, Liza
Sainstek : Jurnal Sains dan Teknologi Vol 6, No 2 (2014)
Publisher : IAIN Batusangkar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (435.54 KB) | DOI: 10.31958/js.v6i2.112

Abstract

This research theoretically describes the molecule n2 p2 with cemetery group d-h using ab initio /STO-3 G that is included in the package of HyperChem Pro.6.0. this study also discusses the effect of atom toward electronic features and the structure that is formed from molecule n2 p2. Moreover, this research investigated the effect of cemetery group n1-P2 toward molecule stability n2 P2. Research findings revealed that loop n1-P2 or loop P2-P3 could be single loop, double loop, and even triple loop.  For the optimum result, the most stable molecule was CIP (E=993242,9375), that is the optimum result of CIPPCI. However, the most unstable molecule was PP (E=423494,6563), that is the optimum result of HPPH. In one group from top-down or in a period form left-right, total energy seems decrease.  In other words, n2 P2 was seen more stable. Key wordS :Ab initio, molekul n2P2, grup simetri D~h
PENGGUNAAN BEBERAPA PELARUT ORGANIK DALAM EKSTRAKSI BESI(III) DENGAN OKSIN SECARA EKSTRAKSI PELARUT Devita, Liza
Sainstek : Jurnal Sains dan Teknologi Vol 4, No 2 (2012)
Publisher : IAIN Batusangkar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (861.294 KB) | DOI: 10.31958/js.v4i2.74

Abstract

The research on the extraction of iron (III)  aims at finding the best condition of extraction of iron (III) using oksin (8-hidroksikuinolin) as the complement. It was done by setting the  oksin concentration, pH, and the appropriate solvent. The  extraction process was done in a separating funnel. The reaction occurs when the water phase containing ions of iron (III) contacted an organic phase containing oksin as a chelate ligand. The water phase was measured with atomic absorption Spectrophotometer.  The concentration of iron (III) in the organic phase extracted was obtained from the difference between the concentration of iron (III) with the initial concentration of iron (III) which was measured by atomic absorption spectrophotometer. As the result of the research, it was found that Fe-Oksinat was extracted optimally at pH 3, the concentration of iron (III) concentration of 10 ppm and oksin 0.12 M, with a 40-minute standing time and agitation time 20 min. Fe-oksinat for benzene solvent extracted optimum pH 3, the concentration of iron (III) concentration of 10 ppm and 0.12 M. oksin with a 20-minute standing time and mixing time 10 minutes. From the comparative figures of the comparison distribution at the optimum conditions for the three solvents (chloroform, ethyl acetate and benzene), it was obtained that the best solvent for the extraction of iron (III) with oksin as a completing agent is chloroform. Key words : solvent extraction, organic solvents, oksin, Iron (III)
Peningkatan Nilai Tambah Cabai Merah (Capsicum annum L.) Melalui Berbagai Proses Pengolahan Setiavani, Gusti; Devita, Liza; Suarti, Budi
Jurnal Altifani Penelitian dan Pengabdian kepada Masyarakat Vol. 3 No. 6 (2023): November 2023 - Jurnal Altifani Penelitian dan Pengabdian kepada Masyarakat
Publisher : Indonesian Scientific Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59395/altifani.v3i6.499

Abstract

Seiring pengembangan luas tanam cabai merah melalui program pengembangan Kawasan Pertanian Terpadu di Kabupaten Dairi, diperlukan peningkatan kapasitas petani dalam hilirisasi cabai merah. Hal ini untuk mengantisipasi fluktuasi harga cabai dan kerusakan pada cabai yang berdampak terhadap pendapatan dan kesejahteraan petani. Kegiatan Pengabdian Masyarakat dilaksanakan di Desa Parbuluan V yang merupakan lokasi KPT di Kabupaten Dairi. Pelaksanaan kegiatan diawali dengan melakukan observasi lokasi dan kelompok tani dilanjutkan pelatihan mengenai pengolahan cabai merah sebanyak 3 kali. Metode pelatihan meliputi ceramah, diskusi, dan praktek langsung. Hasil kegiatan menunjukkan Efektifitas Pelatihan cukup efektif khususnya pelatihan pembuatan saos cabai. Efektifitas Perubahan Perilaku tergolong efektif pada pelatihan pembuatan saos cabai dan cukup efektif pada panen, pembuatan cabai kering dan pengemasan dan labelling. Secara keseluruhan kegiatan pelatihan cukup efektif merubah perliku/sikap peserta selama pelatihan mengenai panen, pembuatan produk olahan cabai merah kering dan saos cabai untuk meningkatkan pengetahuan, nilai tambah dan pendapatan keluarga.
Extension Design for the Use of a Mobile Application for Oil Palm Harvest Recording in Laut Tador District, Batu Bara Regency Alamsyah, Alfian Danis; Devita, Liza; Astuti, Linda Tri Wira
Journal of Multidisciplinary Science: MIKAILALSYS Vol 4 No 3 (2026): Journal of Multidisciplinary Science: MIKAILALSYS
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Harvest recording supports transparent oil palm production reporting for Roundtable on Sustainable Palm Oil (RSPO) certification. However, smallholders in Laut Tador District, Batu Bara Regency, continue to rely on simple manual systems that may expose harvest data to loss. This study developed an agricultural extension design for a mobile harvest-recording application and assessed its acceptance, behavioural outcomes, and continued application use. A quantitative descriptive approach was employed, with data collected through interviews and questionnaires and analysed using extension planning procedures and Likert-scale scoring. Regional potential identification informed a design specifying objectives, target participants, content, methods, media, session volume, location, timing, and costs. The objectives followed SMART and ABCD principles, with a target achievement level of 60%. Overall acceptance of the extension design reached 86.1%. Evaluation results were 80.9% for knowledge, 78.86% for attitudes, 67% for skills, and 30.4% for continued application use. These findings indicate strong acceptance of the extension design alongside limited sustained use of the application. The study provides an extension design tailored to local conditions and highlights continued assistance as a priority for translating acceptance into routine digital harvest recording and strengthening the transparency of production reporting.
Co-Authors Alamsyah, Alfian Danis Budi Suarti Linda Tri Wira Astuti setiavani, gusti