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All Journal Journal of Tropical Soils Jurnal Pendidikan dan Pemberdayaan Masyarakat Jurnal Zarah Science and Technology Indonesia Alotrop Jurnal Pendidikan dan Ilmu Kimia Omni-Akuatika PENDIPA Journal of Science Education Jurnal Teknodik Hydrogen: Jurnal Kependidikan Kimia TRIBUTE: JOURNAL OF COMMUNITY SERVICES Andromeda: Jurnal Pengabdian Masyarakat Rafflesia Mammiri: Jurnal Pengabdian Masyarakat IJIS Edu : Indonesian Journal of Integrated Science Education
Rina Elvia, Rina
Pendidikan Kimia Universitas Bengkulu
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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PENINGKATAN HASIL BELAJAR KIMIA MAHASISWA MENGGUNAKAN MODEL INKUIRI TERBIMBING BERBASIS KONTEKSTUAL Nurhamidah, Nurhamidah; Elvia, Rina; Amida, Nadia; Yanti, Della Novri
Jurnal Zarah Vol 9 No 2 (2021): Jurnal Zarah
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/zarah.v9i2.2916

Abstract

Pembelajaran kimia seringkali dianggap susah oleh sebagian mahasiswa, karena materinya banyak bersifat abstrak, hitungan dan konsep-konsep yang harus dipahami dengan baik. Untuk menunjang proses pembelajaran supaya menarik dan mudah dipahami dibutuhkan model pembelajaran yang tepat sehingga materi tersampaikan dengan baik. Tujuan dari Penelitian ini untuk melihat hasil belajar setelah menerapkan Model Pembelajaran Inkuiri Terbimbing Berbasis Kontekstual pada materi Stoikiometri. Penelitian ini dilakukan kepada mahasiswa baru Program Studi Pendidikan Biologi Fakultas Keguruan dan Ilmu Pendidikan Universitas Bengkulu, semester I angkatan 2020/2021. Hasil belajar dilihat melalui tes kognitif berupa posttest pada setiap akhir siklus. Berdasarkan hasil analisis data postes setiap siklus, menunjukkan terjadi peningkatan hasil belajar dimana nilai rata-rata, dan ketuntasan belajar klasikal siklus I adalah 51.92 dan 2.86 %, siklus II menjadi 72,5 dan 48.57 % dan siklus III naik menjadi 84.85 dan 94.29 %. Hasil ini menunjukkan pada siklus III pembelajaran sudah tuntas, dimana nilai rata-rata yang diperoleh telah ≥ 75 dan ketuntasan belajar klasikal sudah diatas 80 % yaitu 94.29 %.
Pemberdayaan kelompok tani melalui pembuatan bioenergi pertanian dari limbah batang pisang Nurhamidah Nurhamidah; Rina Elvia; Dewi Handayani; Nadia Amida; Citra Dwi Palenti
JPPM (Jurnal Pendidikan dan Pemberdayaan Masyarakat) Vol 7, No 2 (2020): November 2020
Publisher : Departement of Nonformal Education, Graduate Scholl of Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jppm.v7i2.35136

Abstract

Kabupaten Kepahiang merupakan sentra produksi sayur-sayuran dan buah-buahan salah satunya buah pisang. Kualitas produksi sangat bergantung pada proses pemeliharaan dan pemupukan yang harganya sangat memberatkan dan menjadi permasalahan bagi petani. Pasca panen, batang pisang akan dibiarkan sebagai limbah padahal batang pisang berpotensi sebagai bioenergi pertanian. Berkaitan dengan permasalahan dan potensi tersebut maka dilaksanakan  kegiatan pengabdian yang bertujuan untuk memberikan pengetahuan dan motivasi kepada masyarakat Desa Tapak Gedung Kecamatan Tebat Karai Kabupaten Kepahiang Propinsi Bengkulu dalam memanfaatkan limbah pisang. Kegiatan ini dilakukan dengan menggunakan Metode Participatory Action Research (PAR) melalui 3 strategi yaitu Sosialisasi, Pelaksanaan serta monitoring dan evaluasi program. Data dikumpulkan melalui teknik observasi, Fosused Group Discussion (FGD), wawancara, praktek lapangan dan dokumentasi. Kegiatan ini disambut baik dan antusias oleh masyarakat Desa Tapak Gedung. Masyarakat merasa sangat terbantu dalam penyedian pupuk organik dalam menunjang usaha pertaniannya. Berdasarkan strategi yang dilakukan dapat disimpulkan bahwa kegiatan pemberdayaan kelompok tani melalui pembuatan bioenergi pertanian dari limbah batang pisang dapat memberikan ilmu yang sangat membantu bagi masyarakat serta pembuatan pupuk organik dalam skala besar dapat dijadikan alternatife untuk peningkatan ekonomi masyarakat. AbstractKepahiang Regency is a center for the production of vegetables and fruits, one of which is bananas. The quality of production is very dependent on the maintenance and fertilization process, which is very expensive and a problem for farmers. After harvest, banana stems will be left as waste, even though banana stems have the potential as agricultural bioenergy. In connection with these problems and potential, community service activities were carried out aimed at providing knowledge and motivation to the people of Tapak Gedung Village, Tebat Karai District, Kepahiang Regency, Bengkulu Province in utilizing banana waste. This activity is carried out using the Participatory Action Research (PAR) method through 3 strategies: socialization, implementation, and monitoring and evaluation of the program. Data were collected through observation techniques, Focused Group Discussion (FGD), interviews, field practice and documentation. This activity was welcomed and enthusiastically by the people of Tapak Gedung Village. The community feels very helpful in providing organic fertilizers to support their agricultural business. Based on the strategy carried out, it can be concluded that the activities of empowering farmer groups through the manufacture of agrarian bioenergy from banana stem waste can provide knowledge that is very helpful for the community, and the manufacture of organic fertilizers on a large scale can be used as an alternative to improve the community's economy.
Pengembangan media pembelajaran kimia menggunakan video untuk mengukur kemampuan berfikir kritis siswa Rina Endriani; Agus Sundaryono; Rina Elvia
PendIPA Journal of Science Education Vol 2, No 2 (2018): june
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/pendipa.2.2.142-146

Abstract

ABSTRAKPenelitian ini bertujuan untuk mengembangkan media pembelajaran dalam bentuk video pembelajaran kimia dan digunakan untuk mengukur kemampuan berpikir kritis siswa. Metode yang digunakan adalah penelitian dan pengembangan (Research and Development) pembelajaran kimia pada bahan minyak bumi dengan model Dick dan Carey, melalui tahapan: desain, validasi, revisi dan tes formatif untuk siswa kelas XI di SMAN 1 Bengkulu Tengah. Kemampuan berpikir kognitif siswa dapat diukur dan dilihat dari hasil tes formatif, data yang diperoleh dalam bentuk data kuantitatif dan dilakukan analisis deskriptif untuk menilai kemampuan berpikir kritis siswa. Berdasarkan hasil tes formatif, 13,3% siswa kurang kritis, 60% siswa kritis, 20% siswa kritis dan 6,67% sangat penting.Kata kunci: Pengembangan; media; pembelajaran kimia; video; berfikir kritis.
Produksi Biofuel Dari Limbah Cpo Dengan Katalis Berbasis Titanium Oksida Dan Implementasinya Pada Pembelajaran Kimia Nurlia Latifah; Agus Sundaryono; Rina Elvia
PendIPA Journal of Science Education Vol 1, No 1 (2017): october
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (205.486 KB) | DOI: 10.33369/pendipa.1.1.19-24

Abstract

Conversion of CPO waste into biofuel is one of the efforts to find alternative energy to overcome Indonesia's energy crisis. The resulting methyl ester was further processed into biofuel by cracking process with Ni/TiO2 and Co/TiO2 catalysts at temperature > 350oC for 2.5 hours followed by distillation. Educational research was done by doing the learning process by using biofuel module. The optimum biofuel yield was obtained from cracking methyl ester with 5% Ni/TiO2 catalyst and 3% Co/TiO2 catalyst respectively of 66,67 and 61,90%. The physical and chemical properties of cracked biofuels with Ni/TiO2 and Co/ TiO2 catalysts have complied with ASTM standards for biofuel except acid numbers. There is an increase in student learning outcomes before and after using the module. 
PENGEMBANGAN INSTRUMEN ASESMEN KOGNITIF BERBASIS KETERAMPILAN BERPIKIR KRITIS PADA MATERI ASAM BASA DI SMA NEGERI 3 BENGKULU TENGAH Rovi Atahilah; Rina Elvia; Febrian Solikhin
ALOTROP Vol 6, No 1 (2022)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v6i1.21753

Abstract

This study aims to develop a cognitive instrument based on critical thinking skills on acid-base material based on needs analysis in schools. This type of research is research and development with the ADDIE model, where researchers only carry out until the implementation stage. The sample of this research is class XI IPA 1 opening 29 people. The sampling technique used was purposive sampling. Data analysis using item validation test and reliability test using Lawshe theory and Rasch model as well as testing students' critical thinking skills. The results of developing the Critical Thinking instrument show that it is valid and has a very high reliable value. Valid questions from validation are 18 questions from 24 questions developed, valid questions from empirical validation 8 questions from the expert validation stage. The results of the trial for critical thinking obtained 3.4% very critical, namely 1 critical person, 51.7% critical, namely 15 students, 37.9% critical, namely 11 students and 7% less critical, namely 2. Average value of thinking skills The overall critical score of students is 62.2% which is in the critical category. For results based on Ennis' critical thinking indicators, 76.6% of questions focus indicators are included in the critical category, 59.3% of indicators determine a source including the critical enough category, critical indicators analyze arguments 66.2% are included in the critical category, indicators define terms and considering a definition 52.4% is included in the quite critical category, the ID indicator assumptions 69.7% is included in the critical category, the indicator observes and considers the observation results 52.4% is included in the quite critical category, the indicator answers challenges 61.4% includes critical category, and indicators make and determine the results of the consideration 59.3% including quite critical category.
UJI EFEKTIVITAS ASAP CAIR CANGKANG BUAH Hevea braziliensis TERHADAP AKTIVITAS BAKTERI Escherichia coli Dinda Oktarina; Sumpono Sumpono; Rina Elvia
ALOTROP Vol 1, No 1 (2017)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v1i1.2704

Abstract

This research purpose to determine the effectiveness of the liquid smoke of the Hevea braziliensis  fruit shell  against the activity of Escherichia coli bacteria. The preparation and purification of liquid smoke is carried out by 4 stages: pyrolysis , sedimentation, stage 1 and stage  2  distillation. This research was started with total acidity test, phenol level, pH and density with result of measurement 4,725% total acid content, 0,84% phenol content, 2,548 pH and 1,004 in density . An antibacterial test  using disc diffusion method by looking at the diameter of the clear zone. There are six concentrations of liquid smoke of  H.braziliensis  rubber shell used, negative control using aquades and positive control using ciprofloxacin . An  effective concentration was found in inhibiting E.coli is 100% concentration with a clear zone diameter of 11.3 mm. The result of analysis using One Way ANOVA showed F count (4.42)> F table (3,23), then H0 rejected, meaning there is a significant difference of influence of concentration to the diameter of clear zone produced.
PENGARUH PEMANFAATAN MEDIA PRESENTASI ONLINE PREZI PADA MATERI KONSEP MOL TERHADAP HASIL BELAJAR SISWA (Studi Eksperimen di Kelas X MIPA SMAN 9 Bengkulu Utara) Ahmad Fadli Zil Ikram; Rina Elvia; Dewi Handayani
ALOTROP Vol 5, No 1 (2021)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v5i1.16488

Abstract

Penelitian ini bertujuan mengetahui pengaruh pemanfaatan media presentasi online Prezi pada materi konsep mol terhadap hasil belajar siswa Kelas X MIPA SMA N 9 Bengkulu Utara Tahun Ajaran 2018/2019. Jenis penelitian ini adalah kuasi eksperimen. Data berupa N-Gain Score, lembar observasi guru, angket respon siswa. Analisis data menggunakan rata-rata, uji normalitas, uji homogenitas, dan uji hipotesis (uji t). Data hasil belajar siswa diperoleh dari nilai pretest dan posttest dengan rata-rata 34,636 dan 71,545 untuk kelas eksperimen sedangkan pada kelas kontrol 27,407 dan 61,407. Pemanfaatan media online Prezi mendapat nilai N-Gain Score sebesar 0,587 diperoleh dari rata-rata pretest dan posttest. Hasil observasi guru kimia pembelajaran berlangsung dengan baik dengan skor total 20. Respon siswa dari angket berisi 10 pernyataan sangat positif dengan persentase 81,93%. Berdasarkan hasil uji hipotesis (Uji t) dengan taraf signifikansi < 0,05 didapat nilai 0,000423. Hal ini menunjukkan bahwa pembelajaran kimia yang menggunakan media presentasi online Prezi dengan pendekatan saintifik lebih baik daripada pembelajaran konvensional.
SINTESIS SILIKA-KITOSAN UNTUK MENURUNKAN KADAR ION BESI DALAM AIR PERMUKAAN Rangga Putra; Rina Elvia; 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/atp.v6i1.20318

Abstract

Penelitian ini bertujuan untuk sistesis silika dari abu sekam padi (Oryza sativa) yang dimofikasi dengan kitosan dan hasilnya diaplikasikan untuk menurunkan kadar ion besi dalam air permukaan, terutama air sumur. Metode yang digunakan adalah metode alkali fusion dengan perbandingan abu dengan KOH sebesar 20:80 % berat total. Hasil penelitian menunjukkan modifikasi antara silika dan kitosan berhasil dilakukan serta kemampuan adsorpsi silika yang dimodifikasi lebih baik dibanding silika biasa. Uji FTIR menunjukkan telah terjadi modifikasi silika dengan kitosan pada rasio silika-kitosan 2:1 dan 2:2. Pada rasio silika-kitosan 2:1 adanya gugus NH pada bilangan gelombang 1559,61 cm-1,sedangkan pada rasio silika-kitosan 2:2 adanya gugus NH pada bilangan gelombang 1556,93 cm-1.Kondisi optimum adsorpsi logam Fe berada pada pH 5, waktu kontak optimum selama 50 menit dengan suhu adsorbat pada suhu 28°C, dan berat optimum pada rasio silika-kitosan 2:0 sebanyak 150 mg dan pada rasio silika-kitosan 2:1 sebanyak 200 mg. Adsorpsi logam Fe pada kondisi optimum pada rasio silika-kitosan 2:1 lebih tinggi dibanding rasio silika-kitosan 2:0. Pada sampel air sumur dengan kondisi optimum, Konsentrasi adsorpsi logam Fe pada  rasio silika-kitosan 2:1 sebesar 0,742 ppm denganefisiensi adsorpsi 64,838% dan adsorpsi rasio silika-kitosan 2:0 sebesar 0,577 ppmdenganefisiensi adsorpsi 89,776%.
SINTESIS DAN KARAKTERISASI XEROGEL HASIL KOPRESIPITASI DARI PASIR PANTAI PANJANG BENGKULU Finni Meyori; Rina Elvia; I Nyoman Candra
ALOTROP Vol 2, No 1 (2018)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v2i1.4646

Abstract

[SYNTHESIS AND CHARACTERIZATION OF XEROGEL RESULTS OF COPRECIPITATION OF LONG BEACH BENGKULU BEACH].  This research aims to synthesize and characterization to  Xerogel which synthesizes from Pantai Panjang  sands Bengkulu. The method used for this study to synthesizes Xerogel is to use the coprecipitation method. Qualitative XRF test against raw sand  materials that were used show that the content of the element is the most significant element of Si. The first  stages of the synthesis of Xerogel is a purification of the sand sample..  Xerogel synthesis is carried out in two phases, namely the manufacture of aqueous solutions of Sodium Silicate and continued with the formation of a gel. The production of Sodium Silicate solution is done using the NaOH concentration at 5, 6 and 7 M.  Gel formation process is done by adding a solution of HCl 10 M into the solution of Sodium Silicate, followed by process of filtration, washing and drying in the oven. The results showed that the optimum conditions of synthesis of Xerogel   obtained  using 6 M NaOH  , with a yield obtained is amounting at 0.8%. The results of the test by XRD shows that the silica crystal structure  on Xerogel  are amorphous-shaped. SEM-EDS test results show that the acquired  Xerogel on research has a smooth texture and size is not homogeneous with the highest content of elements are the elements Si and O.  PSA test shows that particle size in Xerogel an average at 191.4 nm. 
PERBANDINGAN MODEL PEMBELAJARAN KOOPERATIF TIPE THINK TALK WRITE (TTW) DAN CREATIVE PROBLEM SOLVING (CPS) TERHADAP MINAT DAN HASIL BELAJAR KIMIA SISWA Ghea Sefriza Pratiwi; Amrul Bahar; Rina Elvia
ALOTROP Vol 3, No 2 (2019)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v3i2.10497

Abstract

The purpose of this study is to describe the comparison of Think Talk Write learning models and Creative Problem Solving learning models to the interests and learning outcomes of chemistry in basic chemical law material. This research was conducted in January-May 2019. The research conducted was a kind of quasi-experimental research. The population of this study was class X MIA, totaling 136 students in SMAN 8 Kota Bengkulu in the academic year 2018/2019. Sampling was carried out after the normality and homogeneity test, so the X MIA 2 class was selected using Think Talk Write and X MIA 3 models that used the Creative Problem Solving model with a total of 68. Analysis of the data used was mean, normality test, test homogeneity, interest questionnaire analysis, N-Gain Score test and hypothesis test (t test). In general, both of these learning models are able to increase students 'interest and learning outcomes of chemistry, where the percentage of students' interest in learning chemistry in the Think Talk Write model is 80.5% and categorized as good, for the class of Creative Problem Solving model the percentage is 76.6% and also categorized as good. For the value of N-Gain score on Think Talk Write (TTW) class is and categorized as high while in the Creative Problem Solving class is 0.62 and is categorized as medium. The t-test results on the affective aspects are sig. (2-tailed) of 0.015 and on the cognitive aspect of 0.001. It states that there are significant differences in the interest and learning outcomes of chemistry that apply the Think Talk Write (TTW) learning model and Creative Problem Solving
Co-Authors Abdullah, Rosazlin Aditia, Mia Maysella Afrianti, Yolanda Agus Sudaryono Ahmad Fadli Zil Ikram Amida, Nadia Amrul Bahar Angga Aprian Dinata Anisa Rosmalara Annida Nurul Shabrina Areski Febriani Azzahra, Luthfiah Hardianti Budiyanto Budiyanto Chrisnia Nurbaiti Citra Dwi Palenti Della Novri Yanti Denny Parta Wijaya Desy Purnama Sari Dewi Handayani Dewi Handayani Dhea Afvadila Dinda Oktarina Dinda Oktarina Elfrida Napitupuluh Elvinawati Elvinawati Elvinawati Fajri Aneksa Febrian Solikhin Febrian Solikhin Febrian Solikhin Fepri Effendi Finni Meyori Fitri Esa Madina Ghea Sefriza Pratiwi Gina Sanditia Hanif Budi Prayitno Hendry Nordan Hermansyah Amir Hermansyah Amir Hizkia Mahezra Agustin I Nyoman Candra I Nyoman Chandra Idha Ikhsani Ilham Ilham Indah Permata Sari Intan Fadila Irma Sari Kuo Hong Wong M. Lutfi Firdaus Mantiko Parbo Maulana Marcelia Dwi Dahri Maya Oktariana Maya Riski Andraini Muhammad Robi Muzanip Alperi, Muzanip Nabilah Diomara Nady Febri Ariffiando Nina Gusti Noni Dwi Tifani Nurhamidah Nurhamidah Nurhamidah Nurhamidah Nurhamidah Nurhamidah Nurhamidah Nurhamidah Nurlia Latifah Nursaadah, Euis Pangesti Dewi Pepi Pepi Pica Lestari Purwo Ismaya Sari Putri Nopita Sari Putri, Pipin Melisa Rangga Putra Rendy W Wardhana Rensy Aula Sari Resmareta, Resmareta Reswari, Argana Rika Juwita Saputri Rina Endriani Rita Handayanti Rizki Karimullah Ronawati Silaban Rovi Atahilah Salastri Rohiat Salastri Rohiat Salastri Rohiat Salastri Rohiat Salastri Rohiat, Salastri Sherly Ernita Shiba Meike Indira Shinta Lestari Siti Zaya Aisyahlika Solikhin, Febrian Suandi, Nabilla Aprillia Nur Suci Lastrini Sumpono Sumpono Sumpono Sumpono Supriyadi, Rendi Sura Ginting Sura Menda Ginting Tari Nurfadillah Triana Krisandini Trisan Amelia Weny Shintia Widiya Agustina Wiwit Wiwit Wiwit Wiwit Yanti, Della Novri Yola Dewi Putri Zeles, Trisia Monica