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All Journal Bumi Lestari Naturalis : Jurnal Penelitian Pengelolaan Sumberdaya Alam dan Lingkungan Jurnal Agroindustri EnviroScienteae PENDIPA Journal of Science Education Molekul: Jurnal Ilmiah Kimia Jurnal Ilmu Kehutanan

Ridwan Yahya

Universitas Bengkulu

Author-ID : 3327935

Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Environmental Science Industrial & Manufacturing Engineering Mathematics

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Analisis kadar komponen kimia pelepah sawit varietas dura sebagai bahan baku pulp yang diterapkan pada pembelajaran kimia Sri Astuti; Ridwan Yahya; Agus Sundaryono
PendIPA Journal of Science Education Vol 2, No 1 (2018): February
Publisher : University of Bengkulu

ABSTRAK Penelitian ini bertujuan untuk menentukan kadar komponen kimia yang meliputi zat ekstraktif, lignin, holoselulosa dan ?-selulosa pelepah sawit varietas dura, menjelaskan pengaruh bagian pelepah sawit varietas dura terhadap kadar ekstraktif, lignin, holoselulosa dan ?-selulosa, membandingkan perbedaan kadar komponen kimia antar bagian pangkal, tengah dan ujung dari pelepah sawit varietas dura, mengindentifikasi gugus fungsi yang ada pada sampel (lignin, holoselulosa dan ?-selulosa) dengan menggunakan metode spektroskopi FTIR, membandingkan pengaruh perbedaan hasil belajar sebelum dan sesudah diberi pengembangan konsep makromolekul dengan melihat video yang diaplikasikan pada Lembar Kerja Peserta Didik (LKPD) terhadap cara berfikir kritis siswa Olimpiade Kimia. Zat ekstraktif, holoselulosa, ?- selulosa dan lignin dianalisis dengan menggunakan Tappi Test methode :204, T 203, T:222 serta diidentifikasi dengan spektroskopi FTIR. Hasil penelitian Kadar komponen kimia pada pelepah sawit varietas dura menurut bagiannya dari pangkal, tengah, ujung berturut-turut dengan rerata untuk kadar zat ekstraktif 8,92%, 7,80% , 7,23%. Lignin 24,89 %, 26,87 %, 24,17 %. Holoselulosa 84,11 %, 83,47 %, 82,24% dan ?- selulosa 45,76 %, 45,76 %, 45,54%. Penelitian pendidikan dengan desain one-group pretes-postes. Penelitian pendidikan dilakukan dengan melakukan proses pembelajaran menggunakan Video dan LKPD sesuai dengan keterampilan berpikir kritis. Pada implementasi dalam pembelajaran terdapat perbedaan pada hasil belajar kimia sebelum dan sesudah proses pembelajaran menggunakan video dan LKPD. Rata-rata nilai pretest 42,25 sedangkan rata-rata postest sebesar 83,50 dan terdapat peningkatan hasil belajar setelah dilakukan proses pembelajaran menggunakan Video dan LKPD secara signifikan sebesar 41.25. Kata kunci: zat ekstraktif; holoselulosa; selulosa; lignin; LKPD.

STUDI KOMPONEN KIMIA PELEPAH SAWIT VARIETAS TENERA DAN PENGEMBANGANNYA SEBAGAI MODUL PEMBELAJARAN KIMIA Arpinaini Arpinaini; Sumpono Sumpono; Ridwan Yahya
PendIPA Journal of Science Education Vol 1, No 1 (2017): october
Publisher : University of Bengkulu

This study aims to (1) determine the levels of the components of the Tenera variety of palm oil compounds including extractives, holocellulose, ? - cellulose, and lignin. (2) Analyze the utilization of the pulp of Tenera varieties as pulp raw materials based on their chemical components; (3) application of chemistry learning module to improving student learning outcomes. Determination of extractive substance content with TAPPI test methods Q: 204; lignin content T: 222; holocellulose Q: 9 levels and ?-cellulose content with TAPPI test methods T: 204. then lignin, holocellulose and ?-cellulose produced from the procedure were characterized by an IR spectrophotometer. The results of the study were module and implemented in ICHO students in SMAN 2 Kota Bengkulu. The data of the research results were analyzed by ANOVA test at 5% level. The results of the characterization of lignin, holocellulose and ?-cellulose with FTIR obtained a distinctive peak of the respective functional groups of the macromolecules. From the research also obtained the average value of chemical component content on the palm velvet varieties of tenera according to their part of base, middle, ends with mean for extractive substance 8.49%, 7,87%, 6,74%, lignin 20,7 %, 18.95%, 16.69%. holocellulose 81.57%, 80.33%, 79.24% and ?- cellulose 44.57%, 43.56%, 43.26%. Based on the results of the variance analysis, the difference in position (base, center, tip) on the palm oil of the tenera varieties on extractive, lignin, holocellulose and ?-cellulose substances has significant differences. Based on the chemical component classification of Indonesian wide wood leaf, sheep betera varieties of tenera in all three positions are used as pulp raw materials because they have moderate lignin content, high levels of Holocellulose and moderate levels of ?-cellulose. The result of module implementation in students there is a significant difference between pretest and posttest value. The use of modules in learning in science groups can improve student learning outcomes.

Pengembangan Modul Berbasis Penelitian Pencegahan P. berghei pada Mus musculus terhadap Berpikir Kritis Mahasiswa Maya Wahyunarti; Ridwan Yahya; Agus Sundaryono
PendIPA Journal of Science Education Vol 3, No 2 (2019): JUNE
Publisher : University of Bengkulu

Abstract[Module Development Based on P. berghei Prevention Research in Musculus on Student Critical Thinking]. This study aims to develop learning module based on the research of prevent the occurrence P. berghei bacterial infection and as well as to determine students' critical thinking skills against learning process by modules. This study is Research and Development with 4D design (define, design, development, and desimination). The results of the study found prevention of Plasmodium behergei infection from% inhibitors of erythrocytes at each dose. The dosage used in this study was a dose of 0.014 g / kgbb, 0.028 g / kgbb, 0.056 g / kgbb. The dose of 0.014 g / kg has an 9,24 % inhibitor, a dose of 0.028 g / kgbb has a 9.93% inhibitor, the dose of 0.056 g / kgbb has a 6.61% inhibitor. So the dose of 0.028 g / kgbb is the dose that most reduces the risk of P.berghei infection Mus musculus. In this study the critical thinking students of Semester 6 Chemistry University of Bengkulu classically are good category with a score of 63.13. This percentage is divided in some indicators, the indicator focus to the question is 67.92 value on the Critical criteria, considering the source can be trusted or not in the critically enough criteria with a value of 59.58, conclude by induction and consider the results of induction with a value of 64, 58 with critical criteria and identify assumptions of getting 63.13 values with critical criteria.Keyword: Module; J. Multifida; P. Berghei; Mus musculus; Critical Thinking.(Received November 19, 2018; Accepted April 15, 2019; Published June 18, 2019)AbstrakPenelitian ini bertujuan mengembangkan modul pembelajaran berbasis penelitian pencegahan infeksi Plasmodium berghei terhadap kemampuan berpikir kritis mahasiswa. Penelitian ini adalah penelitian Research and Development dengan desain penelitian 4D (define, design, development, and desimination). Hasil penelitian didapatkan pencegahan infeksi Plasmodium behergei dari % penghambat pada eritrosit pada setiap dosis. Dosis pada penelitian digunakan dosis 0,014 g/kgbb, 0,028 g/kgbb, 0,056 g/kgbb. Dosis 0,014 g/kgbb memiliki %penghambat 9,24 % , dosis 0,028 g/kgbb mimiliki %penghambat 9,93 %, dosis 0,056 g/kgbb memiliki %penghambat 6,61%. Jadi dosis 0,028 g/kgbb merupakan dosis yang paling mengurangi resiko terinfeksi P.bergehei pada mencit. Pada penelitian berpikir kritis mahasiswa pendidikan Kimia Semester 6 Universitas Bengkulu secara klasikal berada pada kategori baik dengan nilai 63,13. Persentase ini dibagi dalam beberapa indikator yakni indikator memfokuskan pertanyaan berada pada kriteria Kritis dengan nilai 67,92, mempertimbangkan apakah sumber dapat dipercaya atau tidak berada pada kriteria cukup kritis dengan nilai 59,58, menyimpulkan dengan cara induksi dan mempertimbangkan hasil induksi dengan nilai 64,58 dengan kriteria kritis dan mengidentifikasikan asumsi mendapatkan nilai 63,13 dengan kriteria kritis.Kata kunci: Modul; J. Multifida; P. Berghei; Mus musculus; Berpikir Kritis.

Co-Authors AGUS SUSATYA Arpinaini Arpinaini Budiyanto Budiyanto Cahyadi Insan Devi Silsia Devi Silsia Devi Silsia Insan, Cahyadi Jalin Elsaprike Jerry Antonio Maya Wahyunarti Mucharomah Mucharomah Mucharromah Mucharromah Mucharromah Mucharromah Septiana Septiana Sri Astuti Sumpono Sumpono Yuwana Yuwana

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