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All Journal Alotrop Jurnal Pendidikan dan Ilmu Kimia Jurnal Karya Abdi Masyarakat Andromeda: Jurnal Pengabdian Masyarakat Rafflesia
Hermansyah Amir
Universitas Bengkulu
Religion Agriculture, Biological Sciences & Forestry Humanities Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Health Professions Languange, Linguistic, Communication & Media Public Health Social Sciences Other

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ANALISIS KEMAMPUAN PENYELESAIAN SOAL KIMIA LEVEL SIMBOLIK SECARA SISTEMATIS PADA MATERI KELARUTAN DAN HASIL KALI KELARUTAN Miming Firdaus; Salastri Rohiat; Hermansyah Amir
ALOTROP Vol 4, No 2 (2020)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v4i2.16697

Abstract

Penelitian ini bertujuan untuk mengetahui kemampuan representasi simbolik siswa kelas XI IPA SMA N 01 Padang Jaya pada materi kelarutan dan hasil kali kelarutan. Metode yang digunakan dalam penelitian adalah deskriptif dengan pendekatan kuantitatif. Sampel penelitian  berjumlah 52 siswa kelas XI IPA SMA N 01 Padang Jaya. Kemampuan representasi simbolik siswa diukur menggunakan tes tertulis berbentuk esai. Teknik analisis data didasarkan pada data yang telah dikumpulkan dari jawaban tes yang diberikan. Berdasarkan hasil analisis data dapat disimpulkan bahwa kemampuan representasi simbolik siswa kelas XI IPA SMA N 01 Padang Jaya pada materi kelarutan dan hasil kali kelarutan masih rendah. Hal ini ditunjukkan dengan rendahnya persentase rata-rata kemampuan representasi simbolik siswa 40% (kategori kurang).
KARAKTERISASI ADSORBEN KARBON AKTIF DARI SABUT PINANG (Areca catechu ) TERHADAP KAPASITAS ADSORPSI ZAT WARNA INDIGOSOL BLUE 04-B Ahmad Fitriansyah; Hermansyah Amir; Elvinawati Elvinawati
ALOTROP Vol 5, No 1 (2021)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v5i1.16485

Abstract

ANALISIS KEMAMPUAN BERPIKIR KRITIS MATA PELAJARAN KIMIA PADA SISWAKELAS XI IPA SMAN 1 KEPAHIANG Selly Yunita; Salastri Rohiat; Hermansyah Amir
ALOTROP Vol 2, No 1 (2018)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v2i1.4628

Abstract

[ANALYSIS OF THE CRITICAL THINKING ABILITY FROM CHEMICAL SUBJECTS IN STUDENTS OF CLASS XI IPA SMAN 1 KEPAHIANG] This research aims to know the critical thinking ability of students. Type of this research is descriptive research using quantitative methods. This research was carried out in SMA Negeri 1 Kepahiang on September 2 to 8 may in 2017. The population in this research is the entire class XI IPA are registered on the even-numbered school year 2016/2017 semester. As the samples are taken at class XI IPA 6 of 32 participants.  Data collection is done with the test in the form of reserved descriptions as much as 10 round the whole includes indicators of critical thinking from the taxonomy of Bloom that is level (C2) understand (C3), apply (C4), analyzing and evaluating (C5). Test results obtained from the analysis of results the percentage of students with the ability to answer a question of thinking very critically at 15,6%, quite critical at 53,2 %, and less critical at 31,2 %, with an average value of 61.81. From the average of the values obtained showed that students who have average value included in the category of being. Based on the analysis of the data collected can be inferred levels of critical thinking ability of the students in class XI IPA 6 SMA Negeri 1 Kepahiang at school 2016/2017 academic year can be grouped in a category group are of 53,2 %, middle , 15,6 %  at high group and 31,2 % at low groups. From the results, it can be concluded that overall students in grades at  XI IPA 6 SMA Negeri 1 Kepahiang even 2016/2017 academic year with the ability to enough think critically.
ISOLASI DAN IDENTIFIKASI BAKTERI ASAM LAKTAT DARI MAKANAN TRADISIONAL SUKU REJANG DI PROVINSI BENGKULU: “LEMEA” Moga Kurnia; Hermansyah Amir; Dewi Handayani
ALOTROP Vol 4, No 1 (2020)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v4i1.13705

Abstract

This study aims to specify the genus of lactic acid bacteria (LAB) in "lemea" and measure the activity of LAB isolates in producing lactic acid. The sample "lemea" came from one of the home industries in Daspetah Village, Ujan Mas District, Kepahiang Regency which was fermented for 7 days. The research was conducted from February to May 2019, at the Learning Laboratory of Biology and Chemistry, Faculty of Teacher Training and Education, University of Bengkulu. Isolation of LAB from "lemea" using selective media De Man, Rogosa and Sharpe (MRS) supplemented with 0.5% CaCO3 using the pour plate method. The steps of this study include, sampling "lemea", isolation of LAB, identification of macroscopic and microscopic bacteria (Gram staining) and determining% of lactic acid levels using the titration method to measure the activity of LAB isolates. The results identification of BAL isolates in "lemea" obtained two LAB isolates with codes of LK1 and LK2 isolates that had cocci, Gram positive and did not have spores. The measurements results of LAB activity in producing lactic acid, for LK1 isolates, obtained lactic acid levels of 1.92% while LK2 isolates were 1.56% of the local mass. According to the results identification,LK1 and LK2 isolates are the genus Leuconostoc and the highest activity in producing lactic acid in LK isolates.
PEMANFAATAN NANOPARTIKEL EMAS (NPE) SEBAGAI PENDETEKSI KADAR ASAM URAT PADA URINE DENGAN METODE CITRA DIGITAL Rince Anugrah Ilahi; Muhammad Lutfi Firdaus; Hermansyah Amir
ALOTROP Vol 5, No 2 (2021)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v5i2.17113

Abstract

IMPLEMENTASI KURIKULUM 2013 BAGI GURU KIMIA DI SMA NEGERI SEKOTA BENGKULU Ahaky Roza Clorawati; Salastri Rohiat; Hermansyah Amir
ALOTROP Vol 1, No 2 (2017)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v1i2.3535

Abstract

[IMPLEMENTATION OF 2013 CURRICULUM FOR CHEMICAL TEACHERS IN SMA Negeri AT BENGKULU ] This research is a description research conducted from SMA Negeri 1 to SMA Negeri 10 Kota Bengkulu for chemistry teacher in 2016/2017 academic year. This study aims to describe the implementation of the 2013 curriculum for chemistry teachers in the SMA Negeri in Bengkulu City. The population of this research is all the chemistry teachers who teach in ten SMA Negeri in Bengkulu consisting of 42 teachers. Samples were taken by proportional random sampling technique as much as 20%, but the samples taken are teachers who have implemented the curriculum 2013. Obtained final sample of 26 teachers. In this study, a questionnaire was used to collect data, including indicators of the overall implementation of the curriculum, scattered on 53 points of statement, using Likert Scale with a score of 1 to 4. which was then processed using Statistical Product Service Solution(SPSS)16 program. The results showed that the implementation of the 2013 curriculum, the average percentage of teachers who have implemented is 66.67% with the category mostly implemented. Specifically that is, planning obtained at 65,385%, implementation obtained at 57,692%. and assessment of learning result obtained at 76,923% with category mostly executed.
PENENTUAN PARAMETER ADSORPSI SILIKA SINTETIK DARI CANGKANG KELAPA SAWIT TERHADAP KANDUNGAN AMMONIUM PADA LIMBAH CAIR TAHU Rizki Karimullah; Rina Elvia; Hermansyah Amir
ALOTROP Vol 2, No 1 (2018)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v2i1.4709

Abstract

[DETERMINATION OF SYNTHETIC SILICA ADSORPTION PARAMETERS OF OIL PALM SHELLS AGAINST THE CONTENT OF AMMONIUM ON LIQUID TOFU WASTE] This research aims to determine adsorption capacity of synthetic silica synthesized from Palm Oil (Elaeis guineensis Jacq) shells ashes against the content of Ammonium on tofu liquid waste . The shell sample soaked in a solution of HCl 10% for 2 hours, charred at a temperature of  300 °C for 3 hours ago ashed at 600 °C for 2 hours. Then ash soaked with HCl 1.2 M for 24 hours.  Taken 120 g of ash shells and then mixed right while heated with 160 mL 4 M NaOH. The residue obtained is heated at a temperature of 5000 °C  for 30 minutes, cooled to room temperature and retrieved the Na2SiO3 particle.The particle then  dissolved into 200 ml aquademin and settled at 12 hours, filtered and filtratnya ditetesi with HCL 1 M while stirring, until the white gel is formed and settled in the next 24 hours, filtered, and dried at a temperature of 120 °C for 2 hours, an silica powder obtained as result.  Ammonium Adsorption is done with mass variation 0125, 0.25, 0.5, 0.75, and 1 g silica as well as variations of the contact time of 15, 30, 60, 90, and 120 minutes. The results showed Ammonium adsorption at tofu liquid waste by silica synthesis from the Palm Oil shell ashes occurs with a maximum mass of 0.25 g and optimum contact time of 30 minutes with a capacity of adsorption of 2.581 mg/L and 3,154 mg/L as well as with adsorption efficiency at  61.9% and 76.8%.
PERBANDINGAN PEMBELAJARAN SAINTIFIK MENGGUNAKAN MODEL KOOPERATIF TIPE STUDENT FASILITATOR AND EXPLAINING (SFE) DAN STUDENT TEAMS ACHIEVEMENT DIVISION (STAD) TERHADAP HASIL BELAJAR KIMIA Florentina Astiani; Amrul Bahar; Hermansyah Amir
ALOTROP Vol 3, No 1 (2019)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v3i1.9028

Abstract

This study aims to determine differences in student learning outcomes in chemistry learning using cooperative learning model of Student Facilitator and Explaining (SFE) type and Student Teams Achievement Division (STAD) on the subject of compound nomenclature. This research type is quasi experiment research with population that is class X MIPA in SMAN 9 Kota Bengkulu even semester of academic year 2017/2018 while sample is class X MIPA 2 and class X MIPA 4 obtained from result of normality test and homogeneity test. Student learning outcomes in this study is seen from the difference between pretest and posttest values. Data analysis used were mean value, normality test, homogeneity test and hypothesis test (t test). The average of pretest and posttest difference of the students in the experimental class I (SFE) was obtained 58.70 while in the experimental class II (STAD) obtained the value 54.25. So it can be concluded that student learning outcomes that apply SFE type cooperative model is higher than student learning outcomes that apply STAD type. After testing hypothesis with significant level (? = 0,05), then obtained tcount value> ttable that is 1.782819 > 1.67469. The results showed that there was a significant difference between experimental class I using SFE type cooperative learning model and experiment II class using STAD type.
PERBANDINGAN HASIL BELAJAR SISWA MENGGUNAKAN PEMBELAJARAN KOOPERATIF TIPE TEAM GAMES TOURNAMENT (TGT) DENGAN MEDIA ULAR TANGGA DAN MEDIA PUZZLE DI KELAS XI SMA NEGERI 01 BENGKULU TENGAH Aisha Syafitri; Hermansyah Amir; Elvinawati Elvinawati
ALOTROP Vol 3, No 2 (2019)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v3i2.9911

Abstract

This study aims to determine the comparison of student learning outcomes using cooperative learning type Teams Games Tournament (TGT) with media snake ladder and media puzzle in class XI SMA Negeri 01 Bengkulu Tengah Year 2017/2018 on the subject of colloidal system. This research is a quasi experimental research with the population of all students of class XI SMA Negeri 01 Bengkulu Tengah and the sample is XI MIPA 3 experiment I applying Snake Ladder media and XI MIPA 4 as experiment class II which apply puzzle media. Student learning outcomes in this study is seen from the difference between pretest and posttest values. In the experimental class I which uses snake ladder media, the average value of the increase in students' cognitive learning outcomes is 43.30. Whereas in the experimental class II that uses media puzzle, the average value of the increase in students' cognitive learning outcomes is 35.97. From a series of statistical tests conducted hypothesis testing using t-test with a significant level of 0.01 obtained tHitung> tTable (2.42> 2.39). The results showed that there was a significant difference between the learning outcomes of students who were taught by cooperative learning using Snake Media Appliance and Puzzle media. The result of this research can be concluded that  in general the result of student learning by applying cooperative learning model of Team Games Tournament (TGT) type with snake ladder media is higher than with puzzle media on colloidal system subject.
POTENSI EKSTRAK METABOLIT SEKUNDER Eugenia uniflora L. SEBAGAI BAHAN PENGAWET TAHU Genesis Tria; Nurhamidah Nurhamidah; Hermansyah Amir
ALOTROP Vol 2, No 1 (2018)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v2i1.4630

Abstract

[POTENTIAL OF Eugenia uniflora L SECONDARY METABOLITES EXTRACT AS A TOFU PRESERVATIVE]. The purpose of this research is to know the secondary metabolite compounds from the Eugenia uniflora L (Dewandaru) fruit extracts , as well as to measure the potential of water extract from the fruit of E. uniflora L for the use in the tofu preserve as well as measure the impact of the addition of water extract of the fruit of E. uniflora L against moisture, pH, protein on tofu. The process of preserving test against tofu on the research done by soaking time at 2, 3 and 4 hour with each variation of the concentration of extract at  10, 15 and 20% as well as the observation time at 24 and 48 hours for each treatment.The result of the test water extract of the fruit of the phytochemical profile E. uniflora L showed the content of alkaloids, flavonoids, phenolic , saponins and steroid compounds. Test results from the granting of water extract from the fruit of E.uniflora L in the preserve of tofu with the variation of concentration and soaking time is proven to affect the value of water content, pH, and protein on tofu that was tested.The results of the research done indicate that the granting of a water extract of the fruit of E.uniflora L proven useful to be used as a natural preservative for tofu at 24 hours with a 20% concentration and a soaking time at 2 and 3 hours. From the results, it can be concluded that water extracts from the fruit of E.uniflora L. potential to be used as a natural preservative for tofu.
Co-Authors Ahaky Roza Clorawati Ahmad Fitriansyah Aisha Syafitri Amelia Tripripa Amrul Bahar Amrul Bahar Budiyanto Budiyanto Dapot Parulian Manurung Desy Purnama Sari Dewi Handayani Elvinawati Elvinawati Elvinawati Elvinawati Elvinawati Elvinawati Elvinawati Elvinawati Elvinawati Elvinawati Elvinawati Emilia Febrianti Evi Elyani Febrian Solikhin Febrian Solikhin Fepri Effendi Florentina Astiani Genesis Tria I Nyoman Candra I Nyoman Candra I Nyoman Chandra Intan Fadila Isna Mutaqwiyati January Prayogi M. Lutfi Firdaus Miming Firdaus Moga Kurnia Moli Novela Muhammad Robi Mushi Yana Nadia Amida Nova Syofiana Nurhamidah Okti Mindi Safitri Pepi Pepi Pica Lestari Pramesthi Regita Putri Puji Astuti Rangga Putra Rifki Nomizar Rina Elvia Rina Elvia Rina Elvia Rina Elvia Rince Anugrah Ilahi Riza Gustina Rizki Karimullah Salastri Rohiat Salastri Rohiat Salastri Rohiat Salastri Rohiat Salastri Rohiat Selly Yunita Septri Nurjaya Ningsih Shinta Puspasari Slamet Rozikin Sumpono Sumpono Sura Menda Ginting Sura Menda Ginting Windy Novita Amalia Wiwit Alwi Wiwit Wiwit Yola Dewi Putri Yunike br Tarigan