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All Journal AGRIVITA, Journal of Agricultural Science Indonesian Journal of Chemistry Kwangsan: Jurnal Teknologi Pendidikan Jurnal Abdi Masyarakat Indonesia Prosiding SNPBS (Seminar Nasional Pendidikan Biologi dan Saintek) Molekul: Jurnal Ilmiah Kimia Proceeding of International Conference on Biology Education, Natural Science, and Technology
Sentot Budi Rahardjo
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Sebelas Maret University, Kentingan, Surakarta
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Education Engineering Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Physics Public Health

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Remediation of Lead-contaminated Farmland Soil: Efficacy of Low-cost Natural Amendments in [Im]mobilization of Lead Himawan, Himawan; Rahardjo, Sentot Budi; Suntoro, Suntoro; Setyono, Prabang
AGRIVITA, Journal of Agricultural Science Vol 43, No 1 (2021)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v43i1.2592

Abstract

The control of Pb mobility is a success key in remediation of contaminated soil. This research aimed to explore the effective low-cost amendments in mobilizing or immobilizing lead in contaminated soil, assess environmental risk, and evaluate important amendment properties. Lead-contaminated soil was incubated with 13 materials included chars, bioslurry, limes, rice husk, gypsum, citric acid, natural organic acids and the efficiency of lead immobilization (E) was studied. Soil incubated with 10% amendments was sequentially extracted to determine Pb geochemical fractions and its risk. Selected amendment properties were evaluated through a correlation study with E. The results showed that 6 amendments immobilized lead in the order of chars > gypsum > bioslurry > rice husk. Chicken manure and chicken bone biochars, effectively decreasing lead solubility, were the best immobilising amendments, redistributed lead into the residual fraction and remediated the soil from moderate to low environmental risk. The order of mobilizing amendments was: citric acid > baby orange juice > limes > tamarind > lemon juice > tomato. The citric acid was the most effective mobilizing amendment which increased soluble lead and shifted the soil into high environmental risk status. The three most important amendment properties in influencing soil-Pb mobility were pH, P, and Ca content.
SYNTHESIS AND CHARACTERIZATION OF TRIAQUATRISULFISOKSAZOL COBALT(II)SULPHATE.nHYDRATE COMPLEX Sentot Budi Rahardjo; Abu Masykur; Melin Puspitaningrum
Indonesian Journal of Chemistry Vol 6, No 3 (2006)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (315.905 KB) | DOI: 10.22146/ijc.21731

Abstract

Complex of cobalt(II) with sulfisoxazole (slfs) has been synthesized in 1 : 4 mole ratio of metal to ligands in methanol, the complex formula is [Co(slfs)3(H2O)3]SO4.nH2O. The electric conductivity of the complex in methanol correspond to 1:1 electrolyte. The thermal analysis indicates that complex contain some hydrates. Magnetic Susceptibility measurements show that the complex is paramagnetic with µeff = 4,60(9) BM. Infra red spectra indicates that the primary N-H group coordinated to the center ion, it is signed by a shift of primary N-H group absorption. UV-Vis spectrum appears one peak at λ= 515,5 nm (19.342 cm-1) due to transition peak of 4T1g (F) → 4T2g (P) (ν3) overlay to transition peak of 4T1g(F) → 4A2g(F) (ν2). The value of 10 Dq (Δo) that corresponds to transition 4T1g → 4T2g (n1) is 95,29 kJ.mol-1. Cyclic voltammograms have revealed quasi reversible. The complex probably is octahedral.
PENGEMBANGAN MODUL PROJEK IPAS PADA JURUSAN TEKNIK KENDARAAN RINGAN (TKR) DI SMKN 1 NGRAYUN PONOROGO Hidayah, Arin Khoirul; Budi Rahardjo, Sentot; Saputro, Sulistyo
Kwangsan: Jurnal Teknologi Pendidikan Vol 11, No 2 (2023): Kwangsan
Publisher : Balai Besar Guru Penggerak Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31800/jtp.kw.v11n2.p625--638

Abstract

Project Based Learning (PjBL) is a learning method that uses projects/activities as media. This method requires students to be able to explore, assess, interpret, synthesize, and information to produce various forms of learning outcomes. This study aims to determine the characteristics of the module, validity, practicality and effectiveness of the PjBL-based IPAS teaching module in the TKR Light Vehicle Engineering Department at SMKN 1 Ngrayun Ponorogo. This type of research is research and development or (R&D). The research will be conducted at SMKN 1 Ngrayun Ponorogo. This study uses a qualitative and quantitative approach with the development model used is the Four-D Model (4-D) which consists of four stages, namely: Define, Design, Develop, Disseminate). The results of this study indicate that the teaching modules based on the Project Based Learning (PjBL) model have met the criteria of validity, practicality and effectiveness. The validity criteria based on the results of the open module validation analysis by the validator are in the very valid category. the average implementation value is 1.7925 with the category fully implemented because it is at a distance of 1.5 ≤ M ≤ 2.0 so that the open module meets the practicality criteria. This shows that the teaching modules developed can be used in science learning on the aspects of substances and their changes. The teacher response questionnaire includes statements related to open modules so that a teacher response score of 99% is obtained and overall is in the very practical category because it is in the range of 81% to 100%. Students' responses to teaching modules are known by giving questionnaires containing statements related to teaching modules and knowing students' opinions about the learning carried out. The student response was 98.75% and overall it was in the very practical category because it was in the range of 81% - 100%. AbstrakPenelitian ini bertujuan untuk mengetahui karakteristik modul, validitas, praktikalitas dan efektivitas modul pembelajaran IPAS berbasis PjBL pada Jurusan Teknik Kendaraan Ringan TKR SMKN 1 Ngrayun Ponorogo. Jenis penelitian ini adalah penelitian dan pengembangan atau (R&D). Penelitian akan dilakukan di SMKN 1 Ngrayun Ponorogo. Penelitian ini menggunakan pendekatan kualitatif dan kuantitatif dengan model pengembangan yang digunakan adalah Model Four-D (4-D) yang terdiri dari empat tahap yaitu: Define, Design, Develop, Disseminate). Hasil penelitian ini menunjukkan bahwa modul ajar berbasis model Project Based Learning (PjBL) telah memenuhi kriteria validitas, praktikalitas dan efektivitas. Kriteria validitas berdasarkan hasil analisis validasi modul terbuka oleh validator berada pada kategori sangat valid. nilai rata-rata implementasi sebesar 1,7925 dengan kategori terlaksana sepenuhnya karena berada pada jarak 1,5 ≤ M ≤ 2,0 sehingga modul terbuka memenuhi kriteria kepraktisan. Hal ini menunjukkan bahwa modul ajar yang dikembangkan dapat digunakan dalam pembelajaran IPA pada aspek zat dan perubahannya. Angket respon guru memuat pernyataan-pernyataan terkait modul terbuka sehingga diperoleh skor respon guru sebesar 99% dan secara keseluruhan masuk dalam kategori sangat praktis karena berada pada rentang 81% hingga 100%. Respon siswa terhadap modul pengajaran diketahui dengan memberikan angket yang berisi pernyataan-pernyataan terkait modul pengajaran dan mengetahui pendapat siswa terhadap pembelajaran yang dilaksanakan. Respon siswa sebesar 98,75% dan secara keseluruhan berada pada kategori sangat praktis karena berada pada rentang 81% - 100%.
Peningkatan Kualitas Produksi Ecoprint Corak Pewarna Alam melalui Pendampingan Proses Teknik Pewarnaan di UMKM Ecorilife.Id Wahyuningsih, Sayekti; Rahardjo, Sentot Budi; Lestar, Witri Wahyu; Saraswati, Teguh Endah; Widjonarko, Dian Maruto; Pramono, Edi; Naufal, Widyan Muhammad; Faradilla, Radianita
Jurnal Abdi Masyarakat Indonesia Vol 5 No 1 (2025): JAMSI - Januari 2025
Publisher : CV Firmos

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54082/jamsi.1301

Abstract

Ecorilife.id merupakan salah satu UMKM yang bergerak pada bidang produksi ecoprint. Akan tetapi, terdapat permasalahan prioritas dari mitra, yaitu kualitas warna pada produksi kain ecoprint yang tidak stabil, meliputi pewarnaan dasar gelap dan terang, pengaruh teknis pewarnaan, dan penggunaan bahan-bahan pewarna alam. Solusi yang diharapkan mampu menyelesaikan permasalahan tersebut dilakukan melalui pendampingan proses produksi ecoprint pada Ecorilife.id. Kegiatan tersebut dilakukan dengan melakukan optimasi pada tahap pewarnaan dan mordanting menggunaan tawas (Al2(SO4)3), natrium asetat (Na-acetat), atau soda abu (Na2CO3) supaya produk ecoprint memiliki warna yang tidak mudah luntur serta bercampur secara sempurna dengan kain. Pewarna dasar kain dioptimasi dengan pewarna alam tingi dan jolawe. Tahapan pewarnaan ecoprint dilakukan dengan teknik steaming setelah tahap mordanting yang kemudian dikeringkan. Tahap pewarnaan dan pembentukan motif dilakukan dengan menggunakan motif yang muncul dari daun jati, daun akalipa, daun kalpataru, dan bunga cosmos. Fiksasi dilakukan dengan kapur untuk menghasilkan warna-warna ecoprint yang jelas. Hasil menunjukkan terciptanya produk ecoprint dengan kualitas warna tinggi yang dapat diamati melalui hasil pewarnaan yang terlihat detail, tidak berbaur, dan tidak luntur.
The Feasibility and Effectiveness of High-Level Thinking Tests on Virus to Mapping The Ability of Prospective Science Teacher (Introduction Study on The Development of Integrated Learning Models) Kusumadani, Annur Indra; Rahardjo, Sentot Budi; Yamtinah, Sri; Prayitno, Baskoro Adi
Proceeding of International Conference on Biology Education, Natural Science, and Technology 2023: Proceeding of International Conference on Biology Education, Natural Science, and Technology
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

This research aims to determine the feasibility and effectiveness of a higher - order thinking test developed on material of virus. The test instrument developed was aimed at mapping the ability of prospective science teacher in the preliminary study of developing an integrated learning model. This research is a Research and Development referring to Borg and Gall ( 1989) with 10 stages of research, namely : (1) Initial research and data collection , (2) Planning , (3) Initial product manufacture , (4) Initial trial (expert validation) , (5) Initial product improvement , (6) Test field trial , (7) Operational product improvement , (8) Operational field test (effectiveness test/external validity test) , (9) Final product revision, and (10) Dissemination. The research involved the following experimental subjects : (1) The initial trial involved virus material experts, research and education evaluation experts ; (2) The small group trial involved 36 student teacher candidates at the University of Muhammadiyah Surakarta for the 2020/2021 academic year; (3) The large group trial involved 60 student teacher candidates at the University of Muhammadiyah Surakarta for the 2020/2021 academic year ; and (4) an operational field test (effectiveness test/external validity test) involving 30 teacher candidates at the Muhammadiyah University of Surakarta for the 2020/2021 academic year. The data analysis techniques used were the validity of AIken at the validation stage, item test analysis in the field trial and Pearson correlation analysis at the operational /effectiveness field test stage. The final results of this research are computer-assisted higher order thinking test with 8 questions of higher order thinking on virus material that has strong internal validity with an Aiken validity index of more than 0.73 ( 0.84 to 0.92 ), reliability coefficient 0.814 > 0.213 (r table ) which means high reliability, difficulty index of 0.17 (difficult) to 0.455 (medium), and discriminant index (differentiation power) of 0.2 (enough) to 0.745 (good). External validity/effectiveness is 0.626 (strong enough) to 0.831 (strong) which is the correlation of higher order thinking test results developed with other higher-order thinking tests on virus. The conclusion of this research is that the developed test instrument is feasible and effective to measure the higher order thinking ability of virus.
Perbandingan Kemampuan Berpikir Tingkat Tinggi Mahasiswa Calon Guru Sains menggunakan Model Pembelajaran Socio-Scientific Problem Based Learning with Spiritual Value dengan Model Problem Based Learning Kusumadani, Annur Indra; Rahardjo, Sentot Budi; Yamtinah, Sri; Prayitno, Baskoro Adi
Prosiding SNPBS (Seminar Nasional Pendidikan Biologi dan Saintek) 2022: Prosiding SNPBS (Seminar Nasional Pendidikan Biologi dan Saintek)
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

Pembelajaran sains saat ini umumnya lebih terpusat pada dosen, dimana dosen menjadi sumber pengetahuan sehingga mahasiswa hanya mengandalkan informasi dari dosen dalam proses pembelajaran sehingga berdampak pada kemampuan berpikir tingkat tinggi lemah. Alternatif untuk mengatasi hal tersebut dengan menggunakan model pembelajaran SocioScientific Problem based Learning with Spiritual Value dan Problem based Learning. Penelitian ini bertujuan untuk mengetahui perbandingan kemampuan berpikir tingkat tinggi mahasiswa calon guru sains menggunakan model SocioScientific Problem based Learning with Spiritual Value dan problem based learning. Penelitian ini menggunakan kelas eksperimen dengan model Socio-Scientific Problem based Learning with Spiritual Value dan model Problem Based Learning. Jenis penelitian ini merupakan penelitian quasi-experiment. Sampel penelitian ini adalah mahasiswa calon guru sains FKIP Universitas Muhammadiyah Surakarta semester VI Tahun Akademik 2021-2022. Teknik sampling yang digunakan adalah purposive sampling. Teknik analisis yang digunakan untuk menguji hipotesis adalah Two Independent Sample Test (Uji Mann Withney U). Hasil penelitian menunjukkan bahwa ada perbedaan signifikan kemampuan berpikir tingkat tinggi mahasiswa calon guru sains menggunakan model pembelajaran Socio-Scientific Problem based Learning with Spiritual Value dengan model pembelajaran Problem based Learning. Nilai rata-rata dari kelas yang dibelajarkan dengan menggunakan model SocioScientific Problem based Learning with Spiritual Value 66,20 dengan nilai terendah 56,35 dan nilai tertinggi 79,60. Sedangkan nilai rata-rata kemampuan berpikir tingkat tinggi dari kelas yang dibelajarkan dengan menggunakan model Problem based Learning sebesar 51,40 dengan nilai terendah 39,70 dan nilai tertinggi 69,10.
Mapping the Landscape: Indonesian Fermented Foods, Probiotics, and Cardiovascular Disease Prevention - A Bibliometric and Scoping Review Purbosari, Para Mitta; Rahardjo, Sentot Budi; Widoretno, Sri; Sarwanto, S
Proceeding of International Conference on Biology Education, Natural Science, and Technology 2025: Proceeding of International Conference on Biology Education, Natural Science, and Technology
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

Cardiovascular disease (CVD) constitutes a significant health burden in Indonesia, accounting for approximately one-third of all deaths. Hypercholesterolemia and dyslipidemia are established primary risk factors for CVD. This mini-review synthesizes current knowledge on CVD, the characteristics of probiotic bacteria, and the potential of Indonesian fermented foods to mitigate CVD risk. Indonesia boasts a rich and diverse array of traditional fermented foods, including tape, tempeh, dadih, sayur asin, tempoyak, and growol. Notably, many of these foods harbor diverse probiotic microorganisms, such as Lactobacillus, Bifidobacterium, Lactococcus, Streptococcus, Enterococcus, Weissella, Pediococcus, Rhizopus, Penicillium, and Saccharomyces. Various studies have explored the beneficial effects of probiotics, with hypocholesterolemic and hypolipidemic effects increasing in recent years. Consistent consumption of probiotics has demonstrated the potential to reduce total serum cholesterol, low-density lipoprotein cholesterol, liver cholesterol, and triglycerides, while concurrently elevating high-density lipoprotein cholesterol. The impact of probiotics on lipid profiles is influenced by many factors, such as the specific probiotic strain, dosage, and the individual's dietary habits and overall health status. This review highlighted the promising role of probiotics derived from Indonesian fermented foods as a complementary strategy in preventing cardiovascular disease.
The Initial Screening of Heavy Metal Adsorption on Highly Porous Metal-Organic Frameworks based on MIL-101(Cr), Ethylenediamine-modified MIL-101(Cr), and MIL-101(Cr)-NH2 Dendy, Dendy; Lestari, Witri Wahyu; Anshori, Isa; Rahardjo, Sentot Budi; Pramono, Edi; Saraswati, Teguh Endah; Wibowo, Fajar Rakhman
Molekul Vol 21 No 1 (2026)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2026.21.1.17186

Abstract

ABSTRACT. Heavy metal pollution is a significant environmental issue with detrimental effects on ecosystem and human health. Therefore, comprehensive handling need to be carried out. Herein we studied initial screening adsorption of heavy metals including Ni, Cu, Zn, Cd, and Pb using Metal-Organic Frameworks class of Materials Institute Lavoisier (MIL) based on Cr(III). MIL-101(Cr), and its modification with ethylenediamine (EA), and MIL-101(Cr)-NH2 were prepared under hydrothermal condition. X-ray diffraction and FT-IR analysis confirmed the formation of the targeted materials. A new absorption band at 1050 cm-1 corresponds to vibration of C-N which indicates the successful EA modification into MIL-101(Cr). Nitrogen sorption isotherm measurement revealed MIL-101(Cr) and EA@MIL-101(Cr) have a specific surface area of 2548.6 and 2079 m²/g with micropore-sized, while MIL-101(Cr)-NH2 has a specific surface area of 1583.4 m²/g with micro and mesopore-sized. Adsorption performance was assessed through batch experiments monitored by atomic absorption spectroscopy. The results show that MIL-101(Cr) and its modification with EA exhibit higher adsorption capacities on cadmium and nickel metal ions, compared to MIL-101(Cr)-NH2. Meanwhile, MIL-101(Cr)-NH2 and MIL-101(Cr) show more dominant adsorption capabilities on zinc and copper ions compared to the EA-modified MIL-101(Cr). This result suggests that the material's porosity still plays a dominant role in the adsorption processes compared to amine functionalize group on MIL itself. Keywords: adsorption, chromium(III), heavy metals, MOF, MIL
Co-Authors A.A. Ketut Agung Cahyawan W Abu Masykur Annur Indra Kusumadani Ari Handono Ramelan Arin Khoirul Hidayah, Arin Khoirul Ashadi Baskoro Adi Prayitno Dendy, Dendy Dian Maruto Widjonarko Edi Pramono Eko Sulistiyono, Eko Fajar Rakhman Wibowo Faradilla, Radianita Florentinus Firdiyono Gracia Dian Sidharta, Gracia Dian Hari Hidayatullah, Hari Himawan Himawan Isa Anshori Kusumastuti . Lestar, Witri Wahyu Lestari, Witri Wahyu Melin Puspitaningrum Murwani Dewi Wijayanti, Murwani Dewi Naufal, Widyan Muhammad Ngabekti Ngabekti, Ngabekti Nonoh Siti Aminah Nur Asih Siwi Wulandari, Nur Asih Para Mitta Purbosari Prabang Setyono Raen Finnah, Raen Sarwanto, S Sayekti Wahyuningsih Soerya Dewi Marliana, Soerya Dewi Soerya Dewi Marliyana Sony Atmojo, Sony Sri Mulyani Sri Widoretno Sulistyo Saputro Suntoro Suntoro Teguh Endah Saraswati Tri Martini Yamtinah, Sri