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All Journal Tekno - Pedagogi : Jurnal Teknologi Pendidikan JOURNAL ONLINE OF PHYSICS Jurnal Ilmiah Universitas Batanghari Jambi Indonesian Journal of Science and Mathematics Education Jurnal Pembangunan Berkelanjutan Martabe : Jurnal Pengabdian Kepada Masyarakat Jurnal Kesmas Jambi Integrated Science Education Journal Analit: Analytical and Environmental Chemistry al Kimiya : Jurnal Ilmu Kimia dan Terapan Jurnal Teknologi dan Inovasi Industri Analit: Analytical And Environmental Chemistry
Damris Muhammad
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Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Energy Environmental Science Health Professions Law, Crime, Criminology & Criminal Justice Mathematics Medicine & Pharmacology Physics Public Health Social Sciences Other

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KARAKTERISASI TiO2/KARBON AKTIF DARI AMPAS KOPI DAN UJI ADSORPSI-NYA TERHADAP LIMBAH TETRASIKLIN (C22H24N2O8) Frastica Deswardani; Damris Muhammad; Poni Dwi Manda
JOURNAL ONLINE OF PHYSICS Vol. 8 No. 1 (2022): JOP (Journal Online of Physics) Vol 8 No 1
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v8i1.21083

Abstract

TiO2/Karbon aktif dari ampas kopi telah berhasil dilakukan. Sampel karbon aktif diuji kualitasnya dengan melakukan uji kadar air, kadar abu dan daya serap Iod yang selanjutnya dibandingkan dengan SNI (Standar Nasional Indonesia) 06-3730-1995. Uji kadar air karbon aktif ampas kopi adalah 13,8 % (SNI: maks 15%), kadar abu adalah 9,7% (SNI: maks 10%), dan daya serap Iod adalah 1.173,8 mg/g (SNI: min 750 mg/g). Ketiga uji menunjukkan bahwa kualitas karbon aktif sudah sesuai dengan SNI. Selanjutnya, TiO2/Karbon aktif dikarakterisasi dengan spektrofotometer UV-Vis untuk menentukan nilai energi gapnya dan menunjukkan hasil nilai energi gap sebesar 3 eV. Hasil FTIR (Fourier Transform Infra Red) untuk sampel karbon aktif ampas kopi menunjukkan puncak serapan C-H (2934,16 cm-1), C=C (1581,75 cm-1), C-O (1236,37 cm-1) dan C-C (580,91 cm-1) yang merupakan khas ikatan vibrasi karbon aktif. Keberadaan air juga masih dapat dilihat dengan adanya puncak serapan O-H (3674,95 cm-1). Pada sampel TiO2 murni terdapat puncak serapan milik Ti-O-Ti (600,94 cm-1 dan 493,10 cm-1) yang menunjukkan keberadaan TiO2 pada sampel. Pada sampel TiO2/Karbon aktif juga terdapat puncak serapan Ti-O-Ti (600,94 cm-1 dan 524,64 cm-1) yang menunjukkan keberadaan TiO2 didalam sampel. Lalu terdapat juga puncak serapan Ti-O-C (1505,63 cm-1) yang merupakan serapan khas dari TiO2 yang telah berikatan dengan karbon aktif. Pada hasil uji adsorpsi menunjukkan persentase degradasi yang relatif rendah yaitu untuk variasai waktu 4, 5, dan 6 jam berturut-turut adalah 28,5%, 2,71% dan 28,84%.
EFFECTS OF INITIAL SOIL CARBON AND METAL CONTENTS ON SORPTION OF DISSOLVED ORGANIC CARBON ON THE SOILS OF TROPICAL RAIN FOREST TRANSFORMATION SYSTEMS Ngatijo Ngatijo; Damris Muhammad; Asmadi Saad; Abu Bakar; Wanda Hamidah
Analit: Analytical and Environmental Chemistry Vol 6, No 1 (2021): Analit: Analytical and Environmental Chemistry
Publisher : Universitas Lampung Jl. Prof. Dr. Sumatri Brojonegoro No.1 Bandar Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (438.12 KB) | DOI: 10.23960/aec.v6i1.2021.p12-21

Abstract

Karbon organik terlarut (DOC) dalam tanah memainkan peran penting dalam distribusi nutrisi dan konsentrasinya dapat dipengaruhi oleh keberadaan partikel mineral tanah. Kandungan karbon tanah awal dapat mengurangi kapasitas tanah untuk menyerap DOC karena adanya tolakan muatan negatif. Penelitian ini mengkaji pengaruh kandungan karbon dan logam tanah awal terhadapa dsorpsi DOC yang  ditambahkan pada tanah hutan tropis melalui percobaan batch. Kandungan logam berat tanah (Al dan Fe), total karbon organik dan kandungan DOC tanah ditentukan. Untuk menentukan apakah dan bagaimana variasi kandungan karbon tanah mempengaruhi adsorpsi DOC, maka dua tanah dengan kandungan logam dan karbon yang berbeda (tanah permukaan dan bawah permukaan) dari dua sistem transformasi (hutan tropis sekunder dataran rendah dan perkebunan sawit masyarakat digunakan. Karbon organik terlarut diekstraksi dari permukaan tanah yang kaya organik dengan air dan dipekatkan ketingkat yang diperlukan dan digunakan dalam percobaan batch. Karbon organik terlarut berkorelasi negatif dengan kandungan logam tanah terutama pada sub permukaan tanah. Dengan kandungan organik karbon tinggi korelasinya tidak signifikan. Ini mungkin menjelaskan adanya tolakan DOC yang membawa perubahan negatif oleh partikel tanah kaya organik.http://dx.doi.org/10.23960/aec.v6.i1.2021.p12-21 
Applying the Rasch Model to Assess Retention and Transfer Test Instruments in Science Education on Additive and Addictive Substances Fitria, Anisa; Siburian, Jodion; Falani, Ilham; Muhammad, Damris
Integrated Science Education Journal Vol 5 No 2 (2024): May
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/isej.v5i2.864

Abstract

Purpose of the study: This study aims to evaluate the quality of items in retention and transfer tests related to additive and addictive substances. Using Rasch modeling, the study seeks to enhance the management of learning evaluations and improve our understanding of student abilities and question quality. Methodology: The research utilizes the Rasch Model to analyze retention and transfer test instruments on science topics involving additives and addictive substances. Conducted with Winstep software, the analysis focuses on the performance of 92 purposively sampled 8th-grade students during their first semester of junior high school. The study examines retention and transfer abilities, comprehensively evaluating the test items. Main Findings: The Winstep program analysis reveals that, according to the Rasch model, the average ± MNSQ Outfit values for both items and persons are 0.92. The Outfit ZSTD values for items and persons are -0.12 and -0.01, respectively. The instrument's reliability, measured by Cronbach's alpha, is 0.60, indicating moderate reliability. The research findings demonstrate that each item in the instrument is valid and reasonably reliable, with all 20 items deemed suitable for assessing student performance in retention and transfer tests. Novelty/Originality of this study: This study offers a detailed examination of retention and transfer test instruments' quality using the Rasch Model, providing valuable insights for enhancing the accuracy and reliability of these assessment tools. The research significantly improves educational assessments in science education, particularly in evaluating students' understanding of additives and addictive substances.
Durasi Kerja Berhubungan dengan Risiko Kontaminasi Merkuri Pada Pekerja Penambangan Emas Skala Kecil (PESK) di Kecamatan Limun, Sarolangun, Jambi Agustin, Rista; Muhammad, Damris; Kalsum, Ummi
Jurnal Pembangunan Berkelanjutan Vol. 6 No. 2 (2023): Jurnal Pembangunan Berkelanjutan
Publisher : Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Kabupaten Sarolangun merupakan daerah yang melepas emisi merkuri terbesar pada tahun 2021 dan masih terdapat daerah yang aktif melakukan kegiatan penambangan salah satunya di Kecamatan Limun. Banyak faktor risiko terhadap kontaminasi merkuri pada pekerja PESK. Penelitian ini bertujuan menganalisis hubungan beberapa faktor risiko kontaminasi merkuri (usia, lama tinggal, masa kerja, durasi kerja, durasi pajanan dan frekuensi pajanan) pada pekerja PESK di Kecamatan Limun. Disain penelitian adalah Cross-sectional. Penelitian dilakukan di Kecamatan Limun dengan melakukan wawancara terstruktur serta pengambilan sampel rambut pekerja PESK dan dikirim ke laboratorium PT. ALS Indonesia untuk mengetahui kandungan merkuri sebagai indikator risiko kontaminasi merkuri. Jumlah sampel dalam penelitian ini 15 orang dengan kriteria laki-laki, telah bekerja dan menetap di Kecamatan Limun lebih dari 5 tahu.Analisis data secara univariate dan bivariate menggunakan korelasi Spearman Rank pada tingkat kepercayaan 95%. Hasil penelitian menemukan 6,7% pekerja yang memiliki kontaminasi merkuri di atas Nilai Ambang Batas yang ditetapkan WHO yakni 1 mg/kg. Faktor risiko yang mempengaruhi konsentrasi merkuri pada rambut pekerja PESK di Kecamatan Limun adalah durasi kerja (r = 0,558, P-value = 0,031). Sedangkan faktor lainnya belum dapat dibuktikan mempengaruhi konsentrasi merkuri pada rambut pekerja PESK diantaranya usia (r=-0,211, P-value = 0,451), lama tinggal (r=0,356, P-value=0,193), masa kerja (r=0,403, P-value=0,136), durasi pajanan (r=0,486, P-value=0,066) dan frekuensi pajanan (r=0,501, P-value=0,057). Faktor risiko yang mempengaruhi kontaminasi merkuri pada rambut pekerja PESK di Kecamatan Limun adalah durasi kerja. Pelu adanya rotasi bagian kerja dan penggunaan sarung tangan kulit pada saat pencucian pada penambang untuk menghindari paparan yang bersifat kontinyu.
Pengaruh Penambahan Biochar dari Lignite pada Tanah Bekas Penambangan Batubara terhadap Potensi Immobilisasi Logam Seng (Zn) Menggunakan Batch Experiment Haviz, Muhammad; Nur, Areva Fatiha; Muhammad, Damris; Vabylita, Maria Fransisca; Afriani, Lusmeilia; Ashruri, Ashruri
Jurnal Teknologi dan Inovasi Industri (JTII) Vol 2, No 2 (2021)
Publisher : Fakultas Teknik, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtii.v2i2.34

Abstract

Logam berat merupakan salah satu pencemar yang dihasilkan dari kegiatan  pertambangan yang terdiri atas Zn, Cd, Pb, Cu dan As. Mobilisasi dari logam berat pada lahan tercemar, seperti pada lahan bekas tambang batubara dapat menimbulkan kerusakan pada lingkngan dan kesehatan manusia. Penambahan biochar pada tanah merupakan salah satu cara yang digunakan untuk immobilisasi logam berat. Lignite merupakan salah satu bahan baku biochar. Selama ini, llignite sangat jarang digunakan pada proses pembakaran karena karakteristiknya. Penelitian ini dilakukan dengan menggunakan sampel tanah dari salah satu lokasi bekas penambangan batubara di Kecamatan Muaro Bulian, Kabupaten Batanghari, Provinsi Jambi. Penelitian ini bertujuan untuk mendapatkan dosis biochar yang optimal dalam immobilisasi logam berat Zn. Sampel tanah memiliki pH yang cukup rendah, yaitu sekitar 4,9. Inkubasi logam berat Zn dengan menggunakan biochar dapat meningkatkan pH tanah hingga 7,2. Inkubasi tanah dengan biochar  dilakukan dengan menggunakan variasi konsentrasi biochar  0, 5, 10 dan 15% selama 0, 2, 4 dan 8 pekan. Immobilisasi paling tinggi terjadi pada konsentarsi biochar 5% dan pekan ke-4 dengan kapasitas penyerapan Zn sebesar 0,0043 mg/gr. Immobilisasi logam Zn terjadi karena peran dari pori biochar pada proses adsorpsi fisika.
PENGEMBANGAN BAHAN AJAR MENYIMAK UNTUK SISWA SEKOLAH KEJURUAN Asmiati, Asmiati; Rachmawati, Rachmawati; Muhammad, Damris
Tekno - Pedagogi : Jurnal Teknologi Pendidikan Vol. 2 No. 1 (2012): Tekno-Pedagogi Vol 2 No.1 Maret 2012
Publisher : Program Magister Teknologi Pendidikan Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/teknopedagogi.v2i1.2237

Abstract

This study was aimed at developing listening material and teaching aid. The teaching aid makes use of computer. The purpose of using computer to help students in order to make the teaching-learning process effective and interesting. In constructing or developing the thesis, R & D method is applied. This method consists of 1) assessing to identify goal, 2) conducting instructional analysis, 3) analyzing learners and contexts, 4) writing performance objective, 5) developing assessment instruments, 6) developing instructional strategy, 7) developing and select instructional materials, 8) designing and conducting formative evaluation of instruction, 9) revising instruction, and 10) designing and conducting summative evaluation. The result of the developmental study shows that the teaching aid is good. It gets 3,75. The students who are involved in this study is the students of vocational high school grade X of tourism program. All of them enjoyed the lesson. It can be concluded that the listening material and teaching aid is effective and hence it is easy to be operated. Keyword: listening material, and teaching aid
PENGARUH STRATEGI PEMBELAJARAN KONTEKSTUAL DAN KONSEP DIRI TERHADAP PEMAHAMAN KONSEP MATEMATIKA Hellinawati, Hellinawati; Muhammad, Damris; Kamid, Kamid
Tekno - Pedagogi : Jurnal Teknologi Pendidikan Vol. 5 No. 1 (2015): Tekno-Pedagogi Vol 5 No.1 Maret 2015
Publisher : Program Magister Teknologi Pendidikan Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/teknopedagogi.v5i1.2281

Abstract

The purpose of this study is to prove the existence of the learning effect of Contextual Teaching and Learning (CTL) strategy and the Self-Concept Toward Understanding Math Concepts Grade VIII MTs of Bangko. This research is the quantitative research, that’s the quasi-experimental. Data collection instruments such as questionnaires and tests the concept of self-understanding mathematical concepts. The research result are: (1) There is the influence of contextual teaching and learning strategies for understanding mathematical concepts. (2) There is the influence of self-concept to the understanding of mathematical concepts. (3) There were no effects of contextual teaching and learning strategies for understanding mathematical concepts to students who have a high self- concept. (4) There were no effects of contextual teaching and learning strategies for understanding mathematical concepts to students who have a low self-concept. (5) There is no interaction between learning strategy and self-concept. In this study it was found that CTL and self-concept in learning influence students' understanding of mathematical concepts, but CTL has a powerful role in increasing the understanding of mathematical concepts, regardless of whether the student is a high or low self-concept. Keyword: Contextual Teaching and Learning (CTL) Strategy, Self-Concept, and Understanding of Mathematical Concepts.
PENGEMBANGAN MEDIA BERBASIS KOMPUTER UNTUK PEMBELAJARAN KIMIA KELAS XI PADA SEKOLAH MENENGAH ATAS Berlina, Berlina; Wiryotinoyo, Mujiyono; Muhammad, Damris
Tekno - Pedagogi : Jurnal Teknologi Pendidikan Vol. 4 No. 2 (2014): Tekno-Pedagogi Vol 4 No.2 September 2014
Publisher : Program Magister Teknologi Pendidikan Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/teknopedagogi.v4i2.2289

Abstract

Difficulty learning abstract consepts in material forms of the molecule based on the theory of electron domain and molecular hybridization in the formation of simple covalent coumpounds involving electron is verry small in size. With conventional learning to use the media shaped balloons and images/charta make their experience misconceptions. Make use of computer assisted animations media adobeflash program. The program is able to help students discover and explore the concepts of learning materials to animate the process of formation of the molecules of the compound geometry. The program is easy to obtain and can be used on all computers. Material forms of molecules according to VSEPR theory (valence shell electron pair repulsion) and Hybridization theory contained in the computer based media is aimed at helping students learn to achieve mastery of core competencies which are already contained in the syllabus set by time. Products are developed in accordance with the educational technology area abstract include students in determining the geometry of the steps forming the molecules of the compound. The stages are carried out in the development of media, namely: design learning, create computer based animation media, validate products with product testing. Advice of expert material/content, media expert, design expert, and data from trials of the target group to be enter performance improvement products. Based on the results of the expert validation and testing of the target group can be concluded that the computer –based instructional media products on the molecular forms of material at Senior High School chemistry in particular at ninth grade IPA (Natural Sciences). With regard to these results the school, especially Senior High School 8 Batanghari media products in order to incorporate this learning into the school website that can be accessed by the wider media users for further development. Keyword: Development, Computer based Media, Molecular Forms.
Enhancing mathematical concept understanding: The influence of scaffolding in team-assisted individualization based on self-regulation Pakpahan, Nicolaus; Kamid, Kamid; Muhammad, Damris
Indonesian Journal of Science and Mathematics Education Vol. 8 No. 1 (2025): Indonesian Journal of Science and Mathematics Education
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/ijsme.v8i1.23481

Abstract

Effective learning requires strategies that support students' understanding of mathematical concepts and promote independent learning. This study examines the impact of scaffolding in Team Assisted Individualization (TAI) on students' mathematical conceptual understanding and the role of self-regulation in the learning process. The research employs a quasi-experimental design with a nonequivalent pre-test and post-test control group design involving 109 randomly selected high school students. Data analysis was conducted to compare the effectiveness of TAI with scaffolding, TAI without scaffolding, and Direct Instruction, as well as to evaluate the interaction between learning models and students' self-regulation levels. The results indicate that TAI with scaffolding significantly enhances students' mathematical conceptual understanding compared to other methods. Furthermore, students with high self-regulation demonstrated better conceptual understanding. Interaction analysis reveals that students with moderate to high self-regulation benefit more from scaffolding-based learning. The study concludes that scaffolding in TAI improves students' mathematical conceptual understanding. These findings highlight the importance of gradual scaffolding in supporting students' comprehension before they transition to independent learning. Additionally, this model effectively enhances students' autonomy and critical thinking skills in the classroom.
Development of a Self-Screening Education Model for Household Contacts of Patients with Pulmonary Tuberculosis Abbasiah, Abbasiah; Kalsum, Ummi; Muhammad, Damris; Huda, Nizlel; Asrial, Asrial
Jurnal Kesmas Jambi Vol. 9 No. 1 (2025): VOLUME 9 - NUMBER 1 - MARCH 2025
Publisher : Program Studi Ilmu Kesehatan Masyarakat, Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jkmj.v9i1.47224

Abstract

The prevalence of tuberculosis (TB) in Indonesia continues to increase every year, placing Indonesia second in the world in terms of the number of TB cases. Efforts by the government to control TB are still hampered, one of which is the difficulty of detecting suspected TB cases due to negative stigma that makes patients reluctant to disclose their condition. This is due to a lack of knowledge. This study aims to develop a website-based educational model, “KECAPI,” enabling household contacts of TB patients to conduct self-assessments of transmission risk anytime and anywhere. The study was a development research (Research and Development) using a mixed-method approach within the ADDIE framework. The study subjects include 3 individuals in a one-on-one test, 15 persons in a small group test, and 35 persons for the field test and a control group of 35 persons. User satisfaction with the educational model was assessed using the System Usability Scale, and knowledge improvement was analyzed using the Mann-Whitney test. The “KECAPI” educational model (Recognize-Record-Check) was developed based on the Health Belief Model, Trans Theoretical Model, and Technological Acceptance Model, and was proven to be effective, easy to use, and improved household contacts' knowledge about TB. This model presents animated videos, text, and images and can be accessed via the link https://s.id/kecapitb. It is hoped that this model can be utilized by health institutions to detect suspected of TB cases in the community, thereby increasing the case detection rate and ensuring prompt and appropriate treatment.
Co-Authors Abbasiah, Abbasiah Abu Bakar Abu Bakar Agustin, Rista Ashruri Ashruri, Ashruri Asmadi Saad Asmiati Asmiati Asrial Berlina Berlina Diah Riski Gusti Fitria, Anisa Frastica Deswardani Gunawan, Anjelli Putri Hamidah, Wanda Hellinawati Hellinawati Ilham Falani Intan Lestari Jodion Siburian Kamid Kamid Lusmeilia Afriani M. Haviz Martina Asti Rahayu Mia Aina Mujiyono Wiryotinoyo Ngatijo Ngatijo Ngatijo Ngatijo Nizlel Huda Nur, Areva Fatiha Pakpahan, Nicolaus Poni Dwi Manda Rachmawati Rachmawati Saad, Asmadi Ummi Kalsum Vabylita, Maria Fransisca Wanda Hamidah