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All Journal JURNAL KIMIA SAINS DAN APLIKASI Abdimas Indonesian Journal of Cancer Chemoprevention Jurnal Riset Kimia agriTECH Indonesian Journal of Chemical Science Journal of Physics and Its Applications ABDIMAS SILIWANGI Molekul: Jurnal Ilmiah Kimia Prosiding Seminar Nasional Pengabdian kepada Masyarakat (SINAPMAS) Indonesian Journal of Chemical Science
Mohammad Alauhdin, Mohammad
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Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Engineering Library & Information Science Materials Science & Nanotechnology Medicine & Pharmacology Physics Social Sciences

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Development and Validation of Infrared Spectroscopy Methods for Rutin Compound Analysis Auha, Nydia Ashfi; Alauhdin, Mohammad
Indonesian Journal of Chemical Science Vol 10 No 2 (2021)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ijcs.v10i2.47959

Abstract

Rutin is a glycoside resulting from the condensation of the aglycone quercetin with the sugar rutinose. Some study show that rutin can reduce cardiac hypertrophy and improve heart health. Appropiate levels can optimize rutin performance, it is necessary to develop methods for rutin assays and their validation. This study aims to develop an analytical method for rutin compound with FTIR and their validity. The FTIR methods has several advantages including simple preparation, fast scanning, high resolution, does not take long, and without the use of hazardous reagents and can be used for qualitative and quantitative analysis at the same time. The standard rutin with mass variation (0.5-1.75 mg) was mixed homogeneously with KBr so that the total mass was 16 mg. The mixture of rutin and KBr then made into pellets with a hydraulic machine so that transparent pellets were obtained. Measurement were carried out at wave number 4000-400 cm-1 with 8 scanning. Methods validation include linearity, LoD, LoQ, and precision test. Based on the result of the analysis, the typical peak of rutin compounds is in the wave number range of 900-690 cm-1 namely aromatic C-H. Rutin had linearity, LoD, and LoQ of 0.8719, 0.7 mg, and 2.5 mg, and %RSD repeatability 17.68 % and %RSD reproducibility 17.62 %.
Ekstraksi Antosianin dari Kulit Buah Naga (Hylocereus costaricensis) dan Pemanfaatannya sebagai Indikator Alami Titrasi Asam-Basa Wahyudita Meganingtyas; Mohammad Alauhdin
agriTECH Vol 41, No 3 (2021)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (70.457 KB) | DOI: 10.22146/agritech.52197

Abstract

Kulit buah naga memiliki kandungan senyawa golongan flavonoid, salah satunya adalah antosianin. Antosianin ini dapat berubah warna seiring berubahnya nilai pH sehingga dapat diaplikasikan sebagai indikator asam-basa. Penelitian ini dilakukan untuk memperoleh ekstrak kulit buah naga yang memiliki kandungan antosianin di dalamnya dan memanfaatkannya sebagai indikator titrasi asam-basa. Ekstrak diperoleh melalui ekstraksi dengan 3 variasi pelarut, yaitu aquades, campuran aquades-asam sitrat, dan campuran etanol-asam sitrat. Ekstrak yang diperoleh diuji kandungan senyawa, kestabilan, trayek pH, dan kinerjanya sebagai indikator titrasi asam-basa. Hasil identifikasi menunjukkan ekstrak kulit buah naga mengandung senyawa golongan flavonoid. Ekstrak kulit buah naga mempunyai trayek pH pada kisaran pH 7,33-9,33 sehingga dapat diaplikasikan sebagai indikator pada titrasi asam kuat-basa kuat atau asam lemah-basa kuat. Penggunaan ekstrak kulit buah naga sebagai indikator pada titrasi asam kuat-basa kuat (HCl-NaOH) menghasilkan persen kesalahan teoritis titrasi sebesar +0,0041%, sedangkan pada titrasi asam lemah-basa kuat (CH3COOH-NaOH) sebesar -0,0275%. Ekstrak pekat kulit buah naga relatif stabil dan masih layak digunakan sebagai indikator titrasi asam-basa dengan hasil yang akurat setelah penyimpanan ekstrak selama 30 hari dalam botol tertutup dan suhu rendah. Berdasarkan hasil ini, ekstrak kulit buah naga dapat dimanfaatkan sebagai alternatif indikator sintetis yang umum digunakan pada titrasi asam-basa di laboratorium.
Effect of Dolomite Addition on Fly Ash Based Ceramic Membrane to Reduce COD and BOD of Liquid Waste Widiya Aprilianti; F. Widhi Mahatmanti; Mohammad Alauhdin; Jumaeri Jumaeri
Jurnal Kimia Sains dan Aplikasi Vol 24, No 7 (2021): Volume 24 Issue 7 Year 2021
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (562.375 KB) | DOI: 10.14710/jksa.24.7.228-235

Abstract

Ceramic membrane technology plays an essential role in separation fields such as wastewater treatment. Fly ash as a membrane material has proven to be very effective for many separation processes, including water and air purification, as well as industrial and environmental resource recovery. This study aims to develop a microfiltration ceramic membrane based on fly ash with the addition of dolomite. The synthesized ceramic membranes were then characterized using XRD, SEM, and TGA. Ceramic membranes are used to reduce COD and BOD levels in tofu industrial wastewater. The results showed that the value of membrane porosity tends to increase with the addition of dolomite 0% (D0) to 30% (D30). The increase in the porosity value in the membrane was followed by a decrease in the average pore size, namely 1.6994 m at D0 and 1.1730 m at D30. The membrane with 30% dolomite composition has the best mechanical properties with a compressive strength of 35.29 MPa and superior thermal resistance. This is very beneficial for the use of membranes in the long term. Meanwhile, the membrane filtration ability and the ability of the membrane to reduce COD and BOD levels of waste increased with the addition of dolomite from 0% to 30%. However, the decrease in COD and BOD was smaller in the membrane with 45% dolomite. D30 membrane can reduce COD 80% and BOD up to 71.44%. D30 membrane is the most effective fly ash and dolomite composition in forming pores on the membrane with the best COD and BOD reduction performance.
Sintesis Cepat Nanopartikel Perak dengan Irradiasi Gelombang Mikro dan Aplikasinya sebagai Antibakteri pada Kain Katun Mohammad Alauhdin; Ahmad Dzulfiqar; Arsenius Olfa Herlistyawan
Jurnal Riset Kimia Vol. 13 No. 2 (2022): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v13i2.555

Abstract

Silver nanoparticles (AgNPs) are silver metal particles with nanoscale size. In the scale, they generate different properties compared to the original particle or material. AgNPs can be synthesized in several ways, one of which is through chemical reduction. This method is accelerated by heating, usually using conventional heating. However, the heating takes time, so it is less effective for application. In this study, AgNPs were synthesized by chemical reduction with sodium citrate as a reducing agent accompanied by microwave irradiation to speed up the synthesis process. The resulting AgNPs were then applied to cotton fabric as an antibacterial agent. The reaction lasted for 6 minutes, much faster than using conventional heating. The synthesized particles have an average size of 56.2 nm and are stable for up to 41 days of storage. The AgNPs then can be applied to cotton fabric and inhibit the growth of S. aureus and P. aeruginosa bacteria with a Minimum Inhibitory Concentration of 70%.
Selective Colorimetric Detection of Mercury(II) using Silver Nanoparticles-Chitosan Monica Avissa; Mohammad Alauhdin
Molekul Vol 17 No 1 (2022)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2022.17.1.5597

Abstract

Contamination of the environment by hazardous metal ions has been a major environmental issue for the past several decades. Among several hazardous metals, mercury ion (Hg(II)) is of particular concern as its compounds are extremely toxic. Hence, developing detection methods for traces of Hg(II) ions in aquatic systems is critical for mercury pollution mitigation. One method that can be used to monitor Hg(II) in aquatic systems is colorimetry-based method which is simple, rapid, and low-cost, yet selective and sensitive. The method can be conducted by applying the Localized Surface Plasmon Resonance phenomenon of metal nanoparticles, such as silver nanoparticles. There are non-Hg(II) ions in the aquatic environment that can interfere the measurements. Thus, a selective method is needed to obtain a valid measurement result. Here, we introduced silver nanoparticles-chitosan (AgNPs-Ch) synthesized by chemical reduction as a selective probe of Hg(II) in an aqueous solution. The AgNPs-Ch was synthesized from silver nitrate at 80°C using trisodium citrate and chitosan as reducing agent and stabilizer, respectively. The synthesized nanoparticles were spherical with an average size below 15.0 nm. Moreover, the AgNPs-Ch was selective for Hg(II) with a linearity of 0.9556 in the concentration range of 1 - 5 ppm and was able to detect the ion down to 1.33 ppm.
Fun and Exciting Research in Competitive Research Design Kadarwati, Sri; Sumarni, Woro; Wijaya, Atika; Alauhdin, Mohammad; Kurniawan, Cepi; Huda, Nuril; Budiyanto, Teguh; Pramestia, Rena Aliya; Azzahra, Elvara Siti
Jurnal Abdimas Vol 27, No 2 (2023): December 2023
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/abdimas.v27i2.48396

Abstract

Research involving high school students or equivalent has been in great demand in recent years. Various ministries , government institutions and universities have launched various competitive research programs and events competition based research for SMA/MA level. Students and teachers at MAN 1 Semarang City have so far experienced many difficulties in designing competitive research. The achievements made by MAN 1 Semarang City students in the field of research are still very limited. The limited research experience of accompanying teachers could also be one of the causes. Collaboration with universities as institutions that not only provide education and teaching, but also research development, is a must. Therefore, assistance in designing research that is worthy of being competed in prestigious research competitions by the Semarang State University community service team is very important. Mentoring activities are carried out in the fields of science, technology and social humanities, involving Semarang State University research experts from both fields of study. This activity involved 31 students from MAN 1 Semarang City who were members of the madrasa research program along with 9 research assistant teachers from various fields of science. Activities include assistance in several phases of competitive research design, namely creating research ideas, drafting and finalizing research designs. This activity received a very good response and was seen as being able to help students and research assistant teachers at MAN 1 Semarang City in generating brilliant research ideas with novelty or novelty and high usefulness for the advancement of science and technology. A total of three proposal titles were produced from this activity ; one title in the field of social and human affairs and two titles in the field of science and technology. The obstacles in implementing mentoring are felt by teachers and students who have to spare time between busy teaching and learning activities at madrasas. The implementing team expressed its appreciation to the research supervisors and students who had successfully prepared research proposals to the final stage.
Program peningkatan pemanfaatan instrumentasi laboratorium olimpiade sains terpadu di MAN 2 Kudus sebagai upaya optimalisasi aset Madrasah untuk pendidikan dan penelitian Harjono; Alauhdin, Mohammad; Kurniawan, Cepi; Sulistyani, Martin; Huda, Nuril; Prasetyo, Ridho
Abdimas Siliwangi Vol. 7 No. 3 (2024): Oktober 2024
Publisher : IKIP SILIWANGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22460/as.v7i3.23702

Abstract

Laboratory instrumentation needs to be comprehensively understood by researchers to be used effectively, efficiently, and safely. This knowledge and competence have the potential to generate high-quality research topics. This community service activity aims to enhance the knowledge and competence of the academic community of MAN 2 Kudus in operating laboratory instruments to support high-quality research, as well as optimizing the school's assets for education and research. The methods employed in this community service include: 1) observation, 2) identification of laboratory instrumentation, 3) preparation and monitoring of laboratory instrumentation, and 4) workshops and mentoring. The implementation of the community service program is carried out in stages with a systematic approach, covering: explaining the basic concepts of instrument usage and data analysis methods, demonstrating the use of instruments, hands-on practice, evaluation and feedback, documentation and references, and strengthening materials related to soft skills and hard skills for conducting research in the laboratory. The assessment results show that the skills in operating laboratory instrumentation of the academic community of MAN 2 Kudus have improved. The workshops and mentoring activities have broadened the participants' insights in preparing efficient, safe, and applicable research. Through this community service, it is hoped that the soft skills and hard skills acquired by the academic community can be consistently developed and maintained to enhance the branding value of MAN 2 Kudus in future Olympiads and scientific writing competitions.
Cytotoxic Effects of Cinnamon Powder and Lemongrass Oil-Enriched Roselle Tea on T47D Breast Cancer Cells Aisyah, Sabila; Cahyono, Edy; WH, Nugrahaningsih; Alighiri, Dante; Alauhdin, Mohammad; Zaky, Adrian Maulana; Handayani, Tri; Permatasari, Bella
Indonesian Journal of Cancer Chemoprevention Vol 15, No 3 (2024)
Publisher : Indonesian Society for Cancer Chemoprevention

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14499/indonesianjcanchemoprev15iss3pp186-197

Abstract

Breast cancer is the most prevalent cancer among women and is the leading cause of cancer-related mortality worldwide. This underlines the importance of preventive strategies to reduce the risk. Harnessing natural products like tea could be an alternative preventive strategy. In this study, the chemopreventive potential of roselle flower tea (Hibiscus sabdariffa L.) enriched with cinnamon oil (Cinnamomum burmannii) and lemongrass (Cymbopogon citratus) was evaluated. The tea was formulated using a stirred boiler tank and tested for its cytotoxicity against T47D cells using the MTT method. The cytotoxicity test showed that with the addition of cinnamon oil and lemongrass, roselle tea had more significant cytotoxic activity against T47D cancer cells than pristine roselle tea. Adding 5 g of cinnamon and lemongrass oil vapor for 15 seconds into the tea showed the highest cytotoxicity, with an IC50 of 730 μg/mL. This value is almost three times higher than without adding cinnamon oil and lemongrass. In conclusion, adding cinnamon oil and lemongrass to the roselle tea formulation can increase cytotoxic activity against T47D cancer cells, indicating its potential as a natural anti-cancer agent.Keywords: Chemopreventive, Cinnamon, Lemongrass, Roselle Tea, T47D Cells.
Effect of the Chemical Treatment on the Oxalate Content during the Preparation of Starch Flour from Beneng Taro (Xanthosoma undipes K.Koch) Az-Zahra, Hanifah; Alauhdin, Mohammad
Indonesian Journal of Chemical Science Vol. 14 No. 3 (2025): Indonesian Journal of Chemical Science
Publisher : Prodi Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ijcs.v14i3.20001

Abstract

Indonesia memiliki beragam jenis umbi-umbian salah satunya yaitu talas beneng. Hal yang menjadi kendala dalam pemanfaatan talas ini yaitu terdapatnya senyawa oksalat. Pada penelitian ini, larutan kimia seperti NaCl, NaHCO3, dan CH3COOH dengan berbagai konsentrasi digunakan untuk mengetahui pengaruh perlakuan kimia terhadap kadar oksalat pada proses pembuatan tepung pati talas beneng (Xanthosoma undipes K.Koch). Umbi talas direndam dalam larutan tersebut dan di dalam aquadest sebagai kontrol lalu dijadikan tepung pati. Filtrat hasil perendamannya dianalisis dengan metode titrasi permanganometri untuk mengetahui kadar oksalat terlarut. Tepung patinya dianalisis kadar oksalat larut dan total menggunakan metode HPLC. Filtrat hasil perendaman umbi talas di dalam CH3COOH 20% memiliki kadar oksalat tertinggi sebesar 3630,32 mg/100g umbi segar. Tepung patinya yang memiliki kadar oksalat larut paling tinggi yaitu umbi yang sebelumnya direndam dalam NaCl 20% dengan kadar sebesar 0,0421 mg/100g tepung pati. Sampel tepung pati tersebut dianalisis lebih lanjut untuk mengetahui kadar oksalat total, kadar oksalat totalnya sebesar 0,5320 mg/100g tepung pati. Berdasarkan nilai kadar oksalat larut dan total dapat dihitung kadar oksalat tidak larutnya, umbi yang sebelumnya direndam dalam NaCl 20% memiliki kadar oksalat tidak larut sebesar 0,4899 mg/100g tepung pati
Peningkatan Partisipasi Masyarakat dalam Pengelolaan Sampah Organik sebagai Wujud Pembangunan Desa Berkelanjutan Sulistyaningsih, Triastuti; Alauhdin, Mohammad; Widiarti, Nuni; Wahyuningsih, Ika Jati; Utami, Kaswati Nur; Aldaffa, Raden Muhammad Syawal; Rosanti, Yuan Maylia
Prosiding Seminar Nasional Pengabdian kepada Masyarakat (SINAPMAS) Vol 5, No 1 (2025): Inovasi Bioteknologi untuk Kesejahteraan Masyarakat: Menuju Kampus Berdampak 202
Publisher : Universitas Negeri Malang

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

Abstract

Masalah pengelolaan sampah organik di Indonesia menjadi perhatian serius karena tumpukan sampah organik yang tidak terkelola dengan baik dapat menimbulkan berbagai masalah lingkungan dan kesehatan. Desa Rejosari dengan populasi 3.012 jiwa menghadapi rendahnya kesadaran masyarakat dalam pengelolaan sampah, yang tercermin dari penumpukan sampah di lahan tidak produktif serta keterbatasan pengetahuan dan keterampilan masyarakat dalam mengolah sampah organik menjadi produk bernilai ekonomi. Oleh karena itu, dilakukan kegiatan pemberdayaan masyarakat yang bertujuan meningkatkan kesadaran masyarakat Desa Rejosari tentang pentingnya pengelolaan sampah organik sekaligus memberikan keterampilan dalam pembuatan kompos dan eco-enzyme sebagai solusi pengelolaan sampah organik. Kegiatan ini meliputi edukasi mengenai bahaya sampah organik, pelatihan pembuatan kompos dan eco-enzyme, serta pemanfaatan hasil olahan untuk kegiatan urban farming. Data dikumpulkan melalui observasi, wawancara, dan kuesioner. Hasil kegiatan menunjukkan bahwa edukasi, pelatihan, dan pendampingan berhasil meningkatkan pengetahuan dan keterampilan masyarakat dalam mengolah sampah organik, serta menghasilkan kompos dan eco-enzyme yang dimanfaatkan untuk pertanian lokal. Partisipasi masyarakat juga semakin aktif dengan adanya fasilitasi alat pengolahan sampah. Keberhasilan program ini menunjukkan bahwa edukasi dan pelatihan langsung mampu mendorong pengelolaan sampah yang lebih berkelanjutan sekaligus membuka peluang peningkatan kesejahteraan masyarakat melalui produk hasil pengolahan sampah.
Co-Authors - Jumaeri Agung Tri Prasetya Ahmad Dzulfiqar Aisyah, Sabila Aldaffa, Raden Muhammad Syawal Alighiri, Dante Arfah Ratna Puri Gustian, Arfah Ratna Puri Arsenius Olfa Herlistyawan Athoriq, Naufal Atika Wijaya Auha, Nydia Ashfi Aurelia Anggit Widya Munika, Aurelia Anggit Widya Az-Zahra, Hanifah Azzahra, Elvara Siti Budi Astuti Cepi Kurniawan Dyah Setyaningrum, Dyah Edy Cahyono Eko Budi Susatyo Endang Susilaningsih Ervina Nur Hidayati, Ervina Nur Erwin Budi Pamungkas, Erwin Budi F Widhi Mahatmanti Gayuh Ganata Imam Sofyan, Gayuh Ganata Imam Harjono Himnil Khusna, Himnil Ian Yulianti, Ian Kurniawati, Amallia Monica Avissa Mufatihah, Nishfa Nova Shintia Bokau, Nova Shintia Novilla Anggasari, Novilla Nugrahaningsih WH, Nugrahaningsih Nuni Widiarti Nuril Huda Permatasari, Bella Pramestia, Rena Aliya Prasetyo, Ridho Prayogo, Deffrian Putra, Ngurah Made Darma Riera Asti Wulaningrum, Riera Asti Rizkika, Aflah Agus Rizqi, Puji Rosanti, Yuan Maylia Sa’adah, Zumrotus Sri Kadarwati Sulistyani, Martin Suryat Hadi Kusuma, Suryat Hadi Teguh Budiyanto, Teguh Tri Handayani Triastuti Sulistyaningsih Utami, Kaswati Nur Wahyudita Meganingtyas Wahyuningsih, Ika Jati Widiya Aprilianti Winarni Pratjojo, Winarni Wisnu Sunarto Wiwit Prayitno, Wasi Sakti Woro Sumarni Zaky, Adrian Maulana Zumrotus Sa’adah