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Nadia Amida
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Alotrop Jurnal Pendidikan dan Ilmu Kimia
Published by Universitas Bengkulu
ISSN : 22528075     EISSN : 26152819     DOI : -
Core Subject : Science, Education,
Chemistry Education
Welcome to the Journal Alotrop, is an Open-Acces and peer-reviewed journal aims to publish scientific articles related to chemistry and education :i.e an interaction between natural sciences, educational sciences, technologies and management for both education and sciences and wise use of resources. We particularly encourage manuscripts that discuss contemporary research that can be used directly or inderecly in adressing critical issues and sharing of advanced knowledge and best practices in chemistry and education.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 12 Documents
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Search results for , issue "Vol 6, No 1 (2022)" : 12 Documents clear
EKSTRAKSI METABOLIT SEKUNDER DAN UJI ANTIOKSIDAN DARI DAUN MEDANG PERAWAS (Litsera Odorifera val) DENGAN METODE 1,1-DIPHENYL 2-PICRYLHIDRAZYL (DPPH) I Nyoman Candra; Theo Kuntara; Agus Sundaryono
ALOTROP Vol 6, No 1 (2022)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v6i1.22398

Abstract

Litseaodoriferaval.(MedangPerawas) is well recognized in Muko-Mukoregency, Bengkulu Province and used as construction material. In Serawai and Lembak Ethnic groups, it is traditionally used as medication for mouth sprue, stomachache,and boil as well as used for inducing lactation. This research aims to extract secondary metabolite compound group contained in Litseraodorifera val. leaf and to examine its antioxidant activity potency against 1,1-diphenyl 2-picrylhidrazyl (DPPH). A Fresh leaves from Litseraodorifera val. collected from Tahura Forest, Central Bengkulu area were separated into two parts: one run into chemical screeningand the second was used for extraction experiment using ethanol, ethyl acetate, hexane and acetone. Secondary metabolite compound groups contained in those extracts were tested for antioxidantactivity potency. The results showed that the extract of Litseraodorifera val. leaf contained compound group of flavonoid, saponin, tannin, phenolicand terpenoid. The extract of Litseraodorifera val. Leafincrude extract, ethyl acetate, acetone, ethanol and hexane can reduce free radical of  DPPH with IC50 of 250.7; 66.7; 69.7; 100.3 and 181.9 ppm respectively. Those are higher compared to vitamin C whose IC50 was 28.3 ppm. The extract of Litseraodorifera val. leaf haspotency as antioxidant activity that can be developed through further research.
PENGEMBANGAN LEMBAR KERJA PRAKTIKUM MAHASISWA BERBASIS RISET SOLID LIPID NANOPARTIKEL (SLN) TRIMIRISTIN HASIL ISOLASI BIJI PALA (Myristica fragrans) Pramesthi Regita Putri; Agus Sundaryono; Hermansyah Amir
ALOTROP Vol 6, No 1 (2022)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v6i1.22399

Abstract

This research aims to determine the feasibility, practicality, and effectiveness of LKPM based on solid lipid research of trimiristin nanoparticles resulting from nutmeg seed insulation as a guide sheet of organic chemical practicum II in lipid matter. This research uses 4-D methods, consisting of 4 stages, namely define, design, develop, and disseminate. However, in this study the researchers only performed until the third stage which is the development stage (develope). This research data is obtained from the results of material and media expert validation questionnaires, product practicality questionnaires as well as pretest and posttest results tested to fourth semester students who participated in organic chemistry course II.LKPM based on Research Solid Lipid Nanoparticle (SLN) Trimiristin resulting from Nutmeg Seed Isolation that has been developed obtained a value of 83.75% on media validation and obtained a value of 87.3% on material validation, which means it is in the category of highly feasible. While the practicality percentage result of 88.36 % on the small-scale test, which goes into the category strongly agrees, The average result that means students strongly agree that the products that have been developed are very practical to use. The average value of N-Gain Small Scale Test Score is 0.43, meaning it can be concluded that The Student Practicum Worksheet (LKPM) based on Solid Lipid Nanoparticle (SLN) trimiristin research resulting from Nutmeg Seed Isolation (Myristica fragrans) has moderate effectiveness value.

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