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All Journal Alotrop Jurnal Pendidikan dan Ilmu Kimia Bubungan Tinggi: Jurnal Pengabdian Masyarakat Hydrogen: Jurnal Kependidikan Kimia Dulang: Jurnal Pengabdian Kepada Masyarakat Prosiding Seminar Nasional Pengabdian Kepada Masyarakat
Salastri Rohiat
Universitas Bengkulu
Humanities Chemistry Computer Science & IT Economics, Econometrics & Finance Education Energy Environmental Science Industrial & Manufacturing Engineering Public Health Social Sciences Other

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PENERAPAN MODEL PEMBELAJARAN MENCARI PASANGAN DAN BERTUKAR PASANGAN DALAM KELOMPOK DISKUSI TERHADAP HASIL BELAJAR SISWA PADA MATERI SISTEM KOLOID KELAS XI IPA MAN 1 KOTA BENGKULU Sella Aprianika; Amrul Bahar; Salastri Rohiat
ALOTROP Vol 3, No 1 (2019)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v3i1.9048

Abstract

This study aims to determine differences in student learning outcomes using a model of learning make a match with a model partner switch the subject matter colloidal system class XI IPA MAN 1 Bengkulu City in the academic year 2017/2018. The research population of all classes XI IPA amounted to 4 classes with a total population of 151 students. The sampling of the research was done by normality test and homogeneity test before the study population. Obtained a sample of research that consists of 2 classes of class XI IPA 1 as an experimental class I that apply the model make a match and class XI IPA 2 as an experimental class II using a model parten switch. Student learning outcomes are seen from the postest score. Students' learning outcomes in the make a match class had an average of 82.714 while in the partner switch the average pair was 77.5. This shows that the model of make a match is more effectively used in the process of learning in class than the model of partner switch. From the t test-t test on both experiment classes is obtained tcount and ttable = 1.707> 1.666 (? = 0,05). The results show that H0 is rejected and Ha is accepted which means that there is a significant difference between the learning result of the students using make a match model and the learning model partner switch on the material of the colloidal system.
PERBEDAAN HASIL PEMBELAJARAN PROBLEM BASED LEARNING (PBL) MENGGUNAKAN MIND MAPPING DAN SUMMARIZES PADA KELAS XI IPA MAN 1 KOTA BENGKULU TAHUN AJARAN 2017/2018 Alfia Novera Indah Esa Kasih; Amrul Bahar; Salastri Rohiat
ALOTROP Vol 2, No 2 (2018)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v2i2.7475

Abstract

This study aims to determine differences in ProblemBased learning (PBL) using mind mapping ( PBL-mind mapping) and summarizes (PBL –summarizes) on the subject of ionic equilibrium in saline solution. The type of research used is quasi experimental research with population class XI IPA in MAN 1 Kota Bengkulu 2017/2018 academic year which amounted to 152 people and samples taken from normal and homogenous population by random sampling technique so that got sample that is class XI IPA 1 (PBL -Mind Mapping) as an experiment 1 with 36 people and class XI IPA 2 (PBL-Summarizes) as an experiment 2 which is 38 people.Data obtained in the form of cognitive domain learning results obtained from test results in the form of pretest and post-test. Data analysis used were mean score, normality test, homogeneity test, and hypothesis / t test with significance value ? = 0.05 calculated with SPSS 16.0 for Windows. Student learning outcomes in this study seen from the value of difference between pretest and post-test values. The average of pretest and post-test difference of experimental class 1 and 2 students were 56.11 and 49.21 and t-test obtained t-count value is greater than t-table (2.088> 1.99).The results of the data show that there are significant differences between the experimental classes 1 and 2 and show that the result of learning PBL using mind mapping is better with KKM achievement of 83.4% than the result of learning PBL using summarizes with KKM exhaust amounted to 68.4%.
HUBUNGAN IMPLEMENTASI CONTEXTUAL TEACHING AND LEARNING (CTL) DENGAN HASIL BELAJAR SISWA MATA PELAJARAN KIMIA DI KELAS X MIA SMA NEGERI 8 KOTA BENGKULU Pebri Tri Andiko; Salastri Rohiat; Elvinawati Elvinawati
ALOTROP Vol 3, No 1 (2019)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v3i1.9041

Abstract

This study aims to analyze the relationship of Contextual Teaching and Learning (CTL) implementation with students' learning outcomes in X class MIA SMA Negeri 8 Kota Bengkulu at 2017/2018 Academic year. This type of research is correlational research. The population in this research is class X MIA SMA Negeri 8 Kota Bengkulu 2017/2018 Academic year and research using total sampling technique where all population used also become sample of research with total 166 students. Data collection techniques in this study using questionnaires, observation sheets and students' chemistry learning results. Data analysis using Pearson correlational analysis and validation test, reliability, normality, linearity (with F test) , and hypothesis test. Based on the results of data analysis that has been done, obtained general conclusion of a positive relationship between the application of Contextual Teaching and Learning (CTL) with the results of students learningoutcomes in X class MIA SMA Negeri 8 Kota Bengkulu at 2017/2018 Academic year, indicated by the value rhitung obtained greater than the value of tabell r (0.704> 0.1281) with the level of correlation into the category of strong / high, it means there is a positive and strong relationship between the application of Contextual Teaching and Learning with student learning outcomesin X class MIA SMA Negeri 8 Kota Bengkulu at 2017/2018 Academic year.
HUBUNGAN MINAT BELAJAR SISWA DENGAN PRESTASI BELAJAR SISWA PADA MATA PELAJARAN KIMIA DI SMA NEGERI 1 TEBAT KARAI DAN SMA NEGERI 1 KABUPATEN KEPAHIANG Slamet Rozikin; Hermansyah Amir; Salastri Rohiat
ALOTROP Vol 2, No 1 (2018)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v2i1.4740

Abstract

[RELATIONSHIP OF STUDENTS LEARNING ACHIEVEMENTS WITH STUDENTS LEARNING INTEREST IN THE    CHEMISTRY SUBJECTS AT SMA NEGERI 1 TEBAT KARAI AND SMA NEGERI 1 KEPAHIANG] This study aims to measure the significance of relationships of interest in learning chemistry with the result of chemical learning students in class X IPA residing in SMA Negeri 1 Tebat Karai and a in SMA Negeri 1 Kepahiang at 2016/2017 academic year.. The research is the correlation research. The population in this research is the whole  class  of X IPA grade in  SMAN 1 Tebat Karai and SMAN 1 Kepahiang at 2016/2017 academic year with total population 218 students who at was a total sample of research. Data collection techniques in the study used the instruments form of the interest in learning chemistry. Data analysis tested using correlation analysis, test validity, reliability, linear regression and hypothesis testing. Based on the analysis of the data obtained to the conclusion that there was a significant positive relationship between interest in study with the results of the study chemistry well in SMA Negeri 1 Tebat Karai and SMA Negeri 1 Kepahiang, indicated from the value of F test  is greater than F table (30.225 > 3.885) with contributions amounting to 76.4%  with the most significant influence indicator is an understanding of the concept of the learning materials with the value of the average correlation of 0,377, 14. From the results of research conducted obtained the conclusion that that interest in learning affects student learning results in class X SMA Negeri 1 Tebat Karai and SMA Negeri 1 Kepahiang. 
AKTIVITAS ANTIOKSIDAN DAN ANTIBAKTERI EKSTRAK DAUN Strobilanthes crispus Bl (Keji Beling) ) TERHADAP Staphylococcus aureus DAN Escherichia coli Sukaina Adibi; Hendry Nordan; Septri Nurjaya Ningsih; Moga Kurnia; Evando Evando; Salastri Rohiat
ALOTROP Vol 1, No 2 (2017)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v1i2.3547

Abstract

[ANTIXOXIDANT AND ANTIBACTERIA ACTIVITIES OF Strobilanthes crispus Bl (Keji Beling) EXTRACT AGAINST Stapylococcus Aureus AND Escherichia coli] Strobilanthes crispus Bl (Keji Beling)  is one of herbs that has been used for the treatment of several types of diseases such as kidney stones, gall stones, diabetes, cholesterol, tumors and others. The purpose of this study was to determine the value of antioxidant activity (IC50) and antibacterial activity of ethanol extract of leaf vermicelli against Staphylococcus aureus and Escherichia coli bacteria. Antioxidant test was performed using DPPH method and vitamin C was used as standard. While the antibacterial activity test done by paper disc method. Amphicillin is used as a positive control and aquades as a negative control. Ethanol extract of leaf vermicelli able to counteract free radical of DPPH with IC50 value that is: 102.85 ppm and IC50 value from vitamin C as comparative solution equal to 19.268 ppm. The results of antibacterial inhibition test of ethanol extract of vile leaf on S. aureus bacteria with extract concentration of 20% (0 mm), 40% (2.5 mm), 60% (3.25 mm), and 80% (4.75) were included Weak and 100% (5.75 mm) including Medium, and E.coli antibacterial inhibition in the extract con- tacts of 20% (0 mm), 40% (2 mm), 60% (2.25 mm), 80% (4.25 mm) were weak, and 100% (5.25 mm ) including moderate. So it is known that the extract of ethanol leaves vile at 100% concentration can inhibit the growth of S. aureus bacteria and E. coli bacteria characterized by the formation of the largest clear zone diameter at the concentration. But the strength of its bacteria is still not effective to inhibit the growth of both test bacteria.
HUBUNGAN ANTARA SARANA LABORATORIUM TERHADAP KETERAMPILAN PROSES SAINS SISWA KELAS XI MIPA 5 DI SMA NEGERI 3 KOTA BENGKULU Nola Desti Pratiwi Simanjuntak; Salastri Rohiat; Elvinawati Elvinawati
ALOTROP Vol 1, No 2 (2017)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v1i2.3511

Abstract

[RELATIONSHIP BETWEEN LABORATORY FACILITIES AND  STUDENT PROCESS SKILLS AT CLASS XI MIPA 5 IN SMA NEGERI 3 KOTA BENGKULU] The purpose of this study was to determine the relationship of laboratory facilities to students' science process skills in the laboratory. This research is a correlational research. The population in this study is all students of class XI MIPA 5 academic year 2016/2017 in SMA Negeri 3 Kota Bengkulu. This research uses total sampling technique so that the entire population is used as research sample. The independent variable (x) in this research is chemical laboratory equipment and dependent variable (y) is the science process skill of students in laboratory of SMA Negeri 3 Kota Bengkulu.. Data collection in this research using questionnaire instrument with 30 items and observation sheet with 15 items . Technique of data analysis using expert validity test, questionnaire analysis, observation analysis of science process skill, normality test, linearity test, correlation analysis and hypothesis test. Data analysis using the help of SPSS 16 program. The results of data processing correlation coefficient (r) obtained that is equal to 0.387 at 5% significance level. . The result of hypothesis test shows that Ha is accepted which means there is a significant correlation between laboratory facilities and science process skill of students in laboratory on chemistry learning of students of class XI MIPA 5 SMA Negeri 3 Kota Bengkulu academic year 2016/2017
PERBANDINGANHASIL BELAJAR SISWA MENGGUNAKAN MODEL PEMBELAJARAN KOOPERATIF TIPE MAKE A MATCH (MM) DANTEAM GAMES TOURNAMENT (TGT) PADA MATA PELAJARAN KIMIA DI KELAS X IPA MAN 1 KOTA BENGKULU Nova Syofiana; Salastri Rohiat; Hermansyah Amir
ALOTROP Vol 2, No 2 (2018)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v2i2.7479

Abstract

This study aimed to determine differences in students’learning outcomes using cooperative learning model with Make A match and Team Games Tournament on chemistry subject of X IPA in MAN 1 Kota Bengkulu.A quasi-experimental (quasi experiment) was used as research model.Population of this research was all of  X IPA students which was137 students,then,there were 74 students as sample of this research taken from two classes, X IPA1 and X IPA 3.The techniques in data analysis used mean value,questionnaire analysis,normality test,homogeneity test,and t-test with significant ? = 0,05.The data collecting technique was done by usinga SPSS16 program for windows.The data on students learning outcomes were seen by differences between pre-test and post-test.Experiment 1class had 47.44  as the average of the differences and Experiment 2 class had43.79 as the average of the differences.The result showed that the students learning outcomes were influenced by learning motivation.Additionally,the data of students learning outcomes in both classes obtained from the learning motivation percentage which were 83,84% categorized as very good and 7,49% as good.From the resultof this study,it could be concluded that, generally,either the learning outcomes or students learning motivation in applying cooperative learning model,TGT type is higher than MM type.It showed that t count > t table,where 1.7515 > 1.6662 forlearning outcomes and 8.9804 > 1.6662 for students learning motivation.In the sameway,there is a significant difference between learning outcomes and students learning motivation by applying cooperative learning model in two types,namely Make A Match (MM) and Team Games Tournament (TGT). 
IMPLEMENTASI MODEL PEMBELAJARAN LEARNING CYCLE 5E PADA MATERI HIDROLISIS GARAM DI KELAS XI MIPA SMAN 1 BENGKULU TENGAH TAHUN AJARAN 2018/2019 Isnaini Safitri; Dewi Handayani; Salastri Rohiat
ALOTROP Vol 3, No 2 (2019)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v3i2.10507

Abstract

This study aims to determine the effect of the implementation of the 5E Learning Cycle learning model on increasing mastery of concepts in the subject matter of salt hydrolysis. This research was conducted at SMAN 1 Bengkulu Tengah in the 2018/2019 class XI MIP academic year in one meeting. The trial implementation of the 5E Learning Cycle model uses a pre-experimental research design with the form of one-group pretest-posttest design. The study was  conducted in February 2019 at SMAN 1 Bengkulu Tengah. The population in this study were students of class XI MIPA in SMA Negeri 1 Bengkulu Tengah academic year 2018/2019 which amounted to 126 people. Determination of the study sample was carried out by testing the normality of the population. The study sample was taken using simple random sampling technique obtained by students of class XI MIPA 1, the number of students was 31 people. The instruments used consisted of student response questionnaire sheets and concept mastery assessment sheets. Student response data, mastery of concepts were analyzed descriptively and their improvement was analyzed by analysis of gain scores. The results showed that students gave a positive response to the 5E learning cycle model with an average value of 4.2 from a maximum value of 5 which indicated that students felt greatly helped by learning with the 5E Learning Cycle model. This is also supported by a high score increase on mastery of concepts which obtained an average value of 76.97 which is in the effective category. Based on the results of the study, it was concluded that the implementation of the 5E learning cycle model in the subject matter of effective salt hydrolysis to improve mastery of concepts in class XI MIPA SMAN 1 Bengkulu Tengah Academic Year 2018/2019.
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.
Studi Komparasi Motivasi Belajar Kimia Siswa Kelas X Program Peminatan dan Lintas Minat di MAN 2 Kota Bengkulu Elinge Haster; Salastri Rohiat; Sumpono Sumpono
ALOTROP Vol 3, No 1 (2019)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v3i1.9039

Abstract

The purpose of this research was to measure differences chemistry learning motivation of tenth grade students class at major (MIPA) and cross-major (IPS) courses in MAN 2 Bengkulu city. The population in this research is 260 students from 8 classes consisting of four MIPA classes and four IPS classes and also become sample in this research. The type of this research is quantitative descriptive that aims to provide a description of the variables of learning chemistry motivation in the class of major (MIPA) and cross-major (IPS) and emphasize the analysis on data figures obtained by statistical methods. Chemical learning motivation data obtained from the results of a questionnaire motivation to learn chemistry. Questionnaire of motivation to learn chemistry consists of 61 items that validity tested by using SPSS (Statistical Package for the Social Sciences) program to obtain 54 valid items and 7 invalid items and tested reliability with Cronbach's Alpha value of 0.897 and this questionnaire is stated reliable. The research questionnaires were analyzed using normality test, homogeneity test and hypothesis test. The average value of students' learning motivation of major (MIPA) and cross-major (IPS) in chemistry subjects was 197.19 and 189.71 in the good category. The hypothesis testing by using the test T 0.05 at significant level, then it was gained value namely 2.8027 > 1.6508. The results showed that there is a significant difference between major courses and cross-major courses in the chemistry learning motivation of tenth grade students. Motivation to learn chemistry in the major courses better than cross-major courses.
Co-Authors Ahaky Roza Clorawati Alfia Novera Indah Esa Kasih Amrul Bahar Anisa Rosmalara Avischa Esty Wandani Dewi Handayani Dewi Handayani Elinge Haster Elvinawati Elvinawati Evando Evando Hendry Nordan Hermansyah Amir Hermansyah Amir Indah Ayu Lestari Isnaini Safitri Moga Kurnia Muzanip Alperi Muzanip Alperi Nola Desti Pratiwi Simanjuntak Nova Syofiana Pebri Tri Andiko Ria Kemala Dewi Rifki Nomizar Rina Elvia Rini Indriani Sella Aprianika Selly Yunita Septri Nurjaya Ningsih Slamet Rozikin Sukaina Adibi Sumpono Sumpono Sura Menda Ginting