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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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Journal : Alotrop Jurnal Pendidikan dan Ilmu Kimia

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PENENTUAN POTENSI EKSTRAK KULIT BATANG TUMBUHAN SIKKAM (Bischofia javanica Blume) SEBAGAI ANTIOKSIDAN DENGAN METODE DPPH DAN SITOTOKSIK DENGAN METODE BSLT Dapot Parulian Manurung; Agus Sundaryono; Hermansyah Amir
ALOTROP Vol 4, No 1 (2020)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v4i1.13715

Abstract

This study aims to determine the level of antioxidant activity of Sikkam bark extract (Bischofia javanica Blume) and its potential as an anticancer agent. This research was conducted in November 2018 - April 2019 in the Laboratory of Chemical Education Guidance and Counseling and Basic Science Laboratory, University of Bengkulu. The sample in this study was obtained from Gunung Mariah village in Simalungun district, North Sumatra. The method used in this study was extraction using maceration, liquid-liquid fractionation, phytochemical test, DPPH (Diphenylpicrylhiydrazyl) test and BSLT test (Brine Shrimp Lethality Test). Extraction maceration using ethanol 96%, fractionation using a solvent n-hexane and ethyl acetate, phytochemical tests using Mayer's reagent, Lieberman-Burchard, FeCl3 1% and H2SO4 2N, antioxidant test using DPPH (1,1-diphenyl-2-picrylhydrazyl) and cytotoxic tests using shrimp Artemia salina Leach larvae. The results of the study on maceration of 800 grams of Sikkam bark obtained a crude extract of 53.6 grams (6.7%). Fractionation from 10 grams of crude extract obtained 7.24 gram ethanol fraction (72.4%), ethyl acetate fraction 2.14 gram (21.4%) and n-Hexane fraction 0.39 gram (3.9%). Phytochemical test results obtained the content of alkaloids, flavonoids, tannins, saponins and terpenoids with the highest yield on tannin compounds. The antioxidant activity test results obtained IC50 values in crude extracts of 20.94 ppm, ethanol fraction 36.29 ppm, ethyl acetate fraction 83.28 ppm and n-Hexane fraction 39.13 ppm which showed that crude extract, ethanol fraction, n-Hexane fraction were categorized as very strong antioxidants and Ethyl acetate fraction is categorized as a strong antioxidant. The cytotoxic test results using crude extract obtained an LC50 value of 54,827 ppm which showed that Sikkam bark extract was toxic so that it was potential as an anticancer agent.
PENGEMBANGAN VIDEO PEMBELAJARAN PENGENALAN ALAT-ALAT LABORATORIUM DAN IMPLEMENTASINYA PADA APLIKASI GOOGLE CLASSROOM Mushi Yana; Elvinawati Elvinawati; 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.v5i2.17140

Abstract

PENGEMBANGAN BUKU SAKU KIMIA BERBASIS MIND MAPPING MATERI HIDROLISIS GARAM KELAS XI MIPA SMAN 1 BENGKULU TENGAH Riza Gustina; Amrul Bahar; 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.v5i2.16699

Abstract

POTENSI SITOTOKSIK DAN ANTIBAKTERI EKSTRAK DAUN Laportea interrupta (L.) Chew (JELATANG AYAM) TERHADAP Staphylococcus aureus Okti Mindi Safitri; Nurhamidah Nurhamidah; 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.v2i2.7492

Abstract

This research aims to determine the profile of phytochemicals, determine the level of cytotoxic extract toward the larva of Artemia salina Leach by using Brine Shrimp Lethality Test (BSLT) method, and to measure how much the activity of  antibacteria leaf ekstract of Laportea Interrupta (L.) Chew  (Jelatang Ayam )  toward the Staphylococcus aureus bacteria. The leaf of L. interrupta  (L.) Chew are dried and grinded well. The half of grinded sample are tested by phytochemical  profile and another one are ekstracted by using etanol liquid for three days then they are evaporated. The result of fitokimia leaf L. interrupta  (L.) Chew test contains secondary metabolite alkaloid,  tanin, terpenoid,  and saponin. The result of cytotoxic extract of leaf L. interrupta  (L.) Chew toward the A. salina Leach is obtained LC50 for 93,33 ppm, so, the L. interrupta  (L.) Chew is toxic because it is in the range of 31 ppm to 1000 ppm and it can be potentially as a anticancer agents. The eksract of Jelatang Ayam leaf can obstruct the growth of S. aureus, on 5 x 104 clear zone concentration that formed 9 mm being medium categorized. The more concentration of the Jelatang leaf ekstract then more its obstruction energy.
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%.
UJI SITOTOKSIK DAN AKTIVITAS ANTIBAKTERI EKSTRAK DAUN PANDAN LAUT (Pandanus Odorifer) TERHADAP BAKTERI Staphylococcus aureus Shinta Puspasari; Nurhamidah Nurhamidah; Hermansyah Amir
ALOTROP Vol 4, No 1 (2020)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v4i1.13708

Abstract

This study aims to determine the activity of marine pandanus extract(Pandanus odorifer) as cytotoxic and antibacterial to Staphylococcus aureus bacteria. This research begins with phytochemical test conducted to find out the secondary metabolite compounds contained in the leaves of P. odorifer. Cytotoxic testing was performed using BSLT method. An antibacterial test was performed against the activity in inhibiting the growth of S. aureus bacteria using a modified disc diffusion method. The results of phytochemical tests showed that ethanol extract of pandanus leaves contain saponin, flavonoids, tannin and terpenoid compounds. The results of cytotoxic test of sea pandan have a very strong toxic level with LC50 value of 4.3557 ppm.The result of measurement of the highest inhibiting zone diameter was obtained at the concentration of 5x104 ppm is 6 mm with the power of inhibitory that is medium. Based on the results of this study can be concluded that the leaves of sea pandan are cytotoxic and have activity as antibacterial
PERBANDINGAN MODEL PEMBELAJARAN KOOPERATIF TIPE NUMBER HEAD TOGETHER (NHT) DAN TIPE JIGSAW TERHADAP HASIL BELAJAR KIMIA SISWA DI SMA NEGERI 6 KOTA BENGKULU Intan Fadila; Hermansyah Amir; Rina Elvia
ALOTROP Vol 4, No 2 (2020)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v4i2.16694

Abstract

PENGEMBANGAN E-MODUL BERBASIS LEARNING CYCLE 7E PADA MATERI LARUTAN PENYANGGA Yunike br Tarigan; Hermansyah Amir; Sura Menda Ginting
ALOTROP Vol 6, No 1 (2022)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v6i1.21754

Abstract

This study aims to test the feasibility of using the developed e-module, and determine student responses after using the e-module.This type of research is research and development using the ADDIE development model. The instruments used in this study wereinterviews with chemistry teachers, validation sheets, and student response questionnaires. This research was conducted at SMAN04 Bengkulu City with a research sample of 30 students of class XII IPA 2. From the result of the research obtained the feasibilitylevel of e-module based on Learning Cycle 7E on the media aspect of 93.75% while the material aspect was 80.40%. Ifaccumulated, the average percentage of the feasibility level of the developed e-module is 87.075%. Based on the results of thevalidation by the e-module validator, the developed module is “very feasible”. Based on the results of student responses to thedeveloped e-module, it was obtained a percentage of 85.20% which was included in the “very good” category. The results of thisstudy indicate that E-module Based on Learning Cycle 7E on Materials Buffer solution is very feasible to use and very feasible tobe applied in the learning process.
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. 
PERBANDINGAN HASIL BELAJAR SISWA DENGAN METODE INDEX CARD MATCH DAN BAMBOO DANCING Moli Novela; Amrul Bahar; 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.v1i2.3530

Abstract

[COMPARISON OF STUDENT LEARNING OUTCOMES  BEETWEN  INDEX CARD MATCH  AND BAMBOO DANCING LEARNING METHOD]  In the learning process teachers often use lecture methods so that students tend to only accept what is given by teachers and many students who feel chemistry lessons are difficult and confusing lessons. This results in low student learning outcomes. One effort that can be done by using the teacher method is varied, one of which is the method of Index Card Match and Bamboo Dancing. This research type is experiment. The population is all students in class X MIPA SMA Negeri 2 Kota Bengkulu as many as 216 students. The sample selection was done by homogeneity test with the result obtained by class X MIPA C (experimental class I) which applied Index Card Match method and X MIPA D (experiment II class) applying Bamboo Dancing method. Data analysis used is normality test, homogeneity test and t test. In this study the results of learning are seen the value of the difference between the average pretest and posttest, where obtained for class X MIPA C is 53.75 and class X MIPA D is 45.55. Then t test is obtained where t test t > t table (3,76 > 2,38), so it can be concluded that there is a significant difference between student learning result using Index Card Match method with Bamboo Dancing on chemical compound nomenclature material.
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