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PEMBUATAN PASTA DAN PEMBENTUKAN LAPISAN TIPIS HIDROKSI APATIT KARBONAT Samah, Selfa Dewati; Arief, Syukri; Jamarun, Novesar
Jurnal Riset Kimia Vol 7, No 2 (2014): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v7i2.180

Â ABSTRACTPaste of Carbonated Hydroxyapatite (CHA) as a biocompatible material that can be used in thebone and teeth repair has been developed on preparation of thick film. CHA paste was preparedby mixing precipitate of CHA with CaSO4 and polyethylene glycol (PEG) in 2-propanol assolvent. Paste was deposited on substrate to get thick films by screen printing method. X raydiffraction (XRD) analysis has shown hexagonal crystal structure and crystal size of CHAacquired 7,2 nm by Scherrerâ€™s method. Fourier Transform Infrared (FTIR) analysis has shownabsorption spectra which indicating phosphate, carbonate, and hydroxide group. Size of thiscomposite particles analyzed by PSA (particle size analyzer) about 3Î¼m and pore size was 0.44-0.49 nm obtained from BET analysis, increased with the addition of CaSO4 (0.44 to 0,49 nm).Rephrase PEG was found as an adhesive and homogenize paste on substrat surface. In addition,CHA paste also potentially can be used as bone cement.Keywords : Paste, thick film, carbonated hydroxyapatite

PEMBUATAN PASTA DAN PEMBENTUKAN LAPISAN TIPIS HIDROKSI APATIT KARBONAT Selfa Dewati Samah; Syukri Arief; Novesar Jamarun
Jurnal Riset Kimia Vol. 7 No. 2 (2014): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v7i2.180

Â ABSTRACTPaste of Carbonated Hydroxyapatite (CHA) as a biocompatible material that can be used in thebone and teeth repair has been developed on preparation of thick film. CHA paste was preparedby mixing precipitate of CHA with CaSO4 and polyethylene glycol (PEG) in 2-propanol assolvent. Paste was deposited on substrate to get thick films by screen printing method. X raydiffraction (XRD) analysis has shown hexagonal crystal structure and crystal size of CHAacquired 7,2 nm by Scherrerâ€™s method. Fourier Transform Infrared (FTIR) analysis has shownabsorption spectra which indicating phosphate, carbonate, and hydroxide group. Size of thiscomposite particles analyzed by PSA (particle size analyzer) about 3Î¼m and pore size was 0.44-0.49 nm obtained from BET analysis, increased with the addition of CaSO4 (0.44 to 0,49 nm).Rephrase PEG was found as an adhesive and homogenize paste on substrat surface. In addition,CHA paste also potentially can be used as bone cement.Keywords : Paste, thick film, carbonated hydroxyapatite

PENENTUAN KADAR NITROGEN DIOKSIDA (NO2) DALAM UDARA AMBIEN DENGAN METODE GRIESS SALTZMAN MENGGUNAKAN SPEKTROFOTOMETER Futeri, Renny; Armin, M. Ikhlas; Samah, Selfa Dewati; Putri, Gustiarini Rika; Elisma, Netri; Syafrinal, Syafrinal; Putri, Melysa; Santia, Anisa Dwi
JURNAL ILMIAH TEKNOLOGI INDSUTRI (SAINTI) Vol 20, No 2 (2023): VOL 20 NO 2 DESEMBER 2023
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/sainti.v20i2.241

Nitrogen dioxide (NO2) contributes greatly as a precursor to a number of harmful secondary air pollutants including nitric acid, the nitrate portion of secondary inorganic aerosols and oxidants including ozone. Nitrogen dioxide gas (NO2) is an ambient air pollutant along with the element nitrogen monoxide (NO) which is usually produced from human activities such as burning vehicle engine fuel, burning rubbish, burning coal and industry. This research aims to monitor the quality of air pollution in industrial areas in East Jakarta. The NO2 content in the air can be determined using the UV-Vis spectrophotometer method based on SNI 7119-2: 2017. The principle of NO2 testing uses a UV-Vis spectrophotometer based on SNI 7119-2: 2017. From the results of the tests carried out, it can be concluded that the NO2 level obtained in sample 1 was found to be 25,153 µg/Nm3, in sample 2 the NO2 level was 28,371 µg/Nm3, in sample 3 the NO2 level was 107,022 µg/Nm3, in sample 4 the NO2 level was 29,720 µg/Nm3. Nm3, and in sample 5 the NO2 level was 83.446 µg/Nm3. Based on PP RI No. 22 attachment VII of 2021 concerning air pollution control, the quality standard for NO2 is 200 µg/Nm3 for 1 hour. So it can be concluded from the results of the tests that have been carried out that the NO2 levels in the environment are still below the quality standard, which means that it is not a source of NO2 pollution, is safe and meets the requirements for human health and the environment.

PENGARUH PROSES PENGERINGAN TERHADAP NILAI PLASTISITAS RETENSI KARET REMAH Akli, Khairul; Febrian, Aby; Samah, Selfa Dewati; Maryam, Maryam
JURNAL ILMIAH TEKNOLOGI INDSUTRI (SAINTI) Vol 20, No 2 (2023): VOL 20 NO 2 DESEMBER 2023
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/sainti.v20i2.237

The crumb rubber SIR 20 originating from the processing of natural rubber (Hevea brasiliensis) plays a crucial role as a primary export commodity in the Indonesian economy. Due to its diverse applications in consumer products and medical devices, natural rubber possesses unique properties such as resilience, elasticity, and wear resistance. The drying process of natural rubber at high temperatures significantly affects its plasticity and strength. This research explores the influence of temperature (130-155°C) and drying time (77-110 minutes) on the plasticity of crumb rubber SIR 20. The results indicate that the PRI (Plasticity Retention Index) values still meet quality standards within certain ranges. The optimal PRI value of 75-76% is obtained at a temperature of 130-135°C for 77 minutes. Increasing the operating temperature and drying time leads to a significant decrease in PRI values due to thermal oxidation occurring in the molecular structure of rubber, thereby affecting the quality of crumb rubber. The findings from this study on the impact of temperature and drying time can provide technical information for the rubber industry to maintain product quality while minimizing environmental impact.

PENENTUAN pH, CHEMICAL OXYGEN DEMAND DAN TOTAL SUSPENDED SOLID PADA KOLAM LIMBAH CAIR PABRIK KELAPA SAWIT Syafrinal, Syafrinal; Samah, Selfa Dewati; Putri, Melysa; Fatmawati, Fatmawati; Januarti, Ria
JURNAL ILMIAH TEKNOLOGI INDSUTRI (SAINTI) Vol 20, No 1 (2023): VOL 20 NO 1 JUNI 2023
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/sainti.v20i1.198

Palm oil mill effluent can pollute the environment and endanger human health. Test parameters that can indicate the quality of palm oil mill effluent are pH, Chemical Oxygen Demand, and Total Suspended Solid. The purpose of this study is to determine the pH using pH meter, COD and TSS values using spektrofotometer UV – Vis in each palm oil mill effluent pond before discharging into the river so as not to pollute the environment. The results of three weeks of testing showed that the pH value of the palm oil mill effluent pond tended to increase from the fat fit pond to the outlet of pond V while the COD and TSS values tended to decrease from the fat fit pond to the outlet of pond V. The pH value of the waste discharged into the river is in the range of 6-9, the COD value is below 350 mg/L and TSS is below 250 mg/L. The results obtained are in accordance with the regulation of the Minister of Environment Number 5 of 2014. The resulting palm oil mill effluent is safe to be discharged into the river.

Pembuatan Cokelat Batang Melalui Proses Fermentasi dari Biji Buah Kakao Syafrinal; Riani, Pevi; Futeri, Renny; Armin, M. Ikhlas; Samah, Selfa Dewati; Hafnimardiyanti; Putri , Melysa
Jurnal Pengabdian Cendikia Nusantara Vol 1 No 2 (2023): Jurnal Pengabdian Cendikia Nusantara
Publisher : Lembaga Riset Cendekia, Yayasan Berkah Putera Indonesia

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

Telah dilakukan kegiatan Pengabdian Kepada Masyarakat (PKM) di Sirambang, Cubadak Air Utara, Kota Pariaman, Provinsi Sumatra Barat dengan judul "Pembuatan Cokelat Batang Melalui Proses Fermentasi dari Biji Buah Kakao." Mitra kegiatan ini adalah kelompok usaha petani Kakao, melibatkan 20 peserta petani dan 7 instruktur dari Politeknik ATI Padang. Saat ini, petani di daerah tersebut masih terbatas dalam mengembangkan hasil pertanian buah kakao menjadi produk pangan. Mereka cenderung hanya menjual biji buah kakao kering kepada agen pengumpul hasil bumi. Oleh karena itu, diperlukan pelatihan untuk mengajarkan cara mengolah biji buah kakao menjadi produk pangan berupa cokelat batang yang memiliki daya tarik tinggi di pasar konsumen, sehingga dapat meningkatkan perekonomian masyarakat. Proses pembuatan cokelat batang melalui fermentasi biji buah kakao dimulai dengan memasukkan biji kakao ke dalam alat fermentor dan mengfermentasinya selama 7 hari. Hasil fermentasi kemudian dijemur di bawah sinar matahari hingga kering, lalu biji kakao disangrai dalam kuali hingga benar-benar kering. Biji kakao yang telah bersih dimasukkan ke dalam blender dan dicampur dengan minyak goreng, susu, dan gula dalam perbandingan 1:1:1:1. Adonan di-blender hingga halus, membentuk pasta cokelat, yang kemudian dicetak dalam cetakan cokelat dan dibekukan dalam freezer. Cokelat batang yang telah terbentuk dikemas menggunakan aluminium foil dan dibungkus dengan kemasan cokelat. Kegiatan PKM dilaksanakan dengan baik dan lancar, diharapkan memberikan wawasan kepada mitra mengenai proses pembuatan cokelat batang melalui fermentasi biji buah kakao. Semoga hasil ini dapat digunakan untuk memenuhi kebutuhan sehari-hari serta menjadi sumber penghasilan tambahan bagi masyarakat.

Produksi Lilin Aromaterapi dari Minyak Jelantah Riani, Pevi; Syafrinal; Futeri, Renny; Armin, M. Ikhlas; Samah, Selfa Dewati; Hafnimardiyanti; Putri , Melysa
Jurnal Pengabdian Cendikia Nusantara Vol 2 No 2 (2024): Jurnal Pengabdian Cendikia Nusantara
Publisher : Lembaga Riset Cendekia, Yayasan Berkah Putera Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70104/pcn.v2i2.101

Telah dilaksanakan kegiatan Program Kemitraan Masyarakat (PKM) di Usaha Ladu Arai Pinang Bunda Kampung Perak Kota Pariaman, Provinsi Sumatra Barat dengan judul “Teknologi Tepat Guna Produksi Lilin Aromaterapi dari Minyak Jelantah”. Mitra kegiatan ini adalah pengusaha Ladu Arai Pinang Bunda Kota Pariaman dengan jumlah peserta 20 orang dan 07 orang instruktur dari Politeknik ATI Padang. Pengabdian dalam bentuk Program Kemitraan Masyarakat (PKM) merupakan program telah diimplementasikan pada pengusaha Ladu Arai Pinang Bunda yang telah mempunyai izin usaha P-IRT 2061377010159 – 26. Ladu Arai Pinang Bunda merupakan salah satu toko oleh-oleh yang cukup dikenal di Kota Pariaman. Ladu Arai Bunda memproduksi ladu arai pinang sebanyak 50 kg setiap minggu dan belum termasuk produksi panganan lainnya seperti rakik kacang, rakik maco, keripik balado dan lain-lain. Berdasarkan produksi tersebut, maka pengusaha tersebut juga menghasilkan hasil samping penggorengan berupa minyak jelantah sebanyak 5 liter dalam sebulan. Proses pembuatan lilin aromaterapi dari minyak jelantah terdiri atas beberapa tahapan yaitu proses penghilangan bumbu, proses netralisasi, proses penjernihan, dan tahapan akhir yaitu pembuatan lilin aromaterapi. Oleh karena itu, Tim PKM memberikan penyuluhan pembuatan lilin aromaterapi dengan memanfaatkan minyak sisa penggorengan produksi. Kegiatan PKM terlaksana dengan baik dan lancar serta sesuai dengan hasil yang diharapkan. Kegiatan ini diharapkan dapat memberikan wawasan, ilmu dan masukan kepada pihak mitra mengenai proses pembuatan lilin aromaterapi dari minyak jelantah sehingga dapat digunakan untuk keperluan sehari-hari dan bahkan dapat dijual oleh pengusaha tersebut.

The Production of Polyhydroxyalkanoate (PHA) Bioplastic from Palm Oil Mill Effluent (POME) using Pseudomonas aeruginosa Ulia, Hasnah; Samah, Selfa Dewati; Nurmalasari, Enny
Jurnal Kimia Sains dan Aplikasi Vol 28, No 7 (2025): Volume 28 Issue 7 Year 2025
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.28.7.387-395

Biodegradable plastics were continuously developed to replace non-degradable plastics. One type of bioplastic that was used was poly(hydroxyalkanoate) (PHA). In this study, PHA was synthesized using Palm Oil Mill Effluent (POME) and the bacterium Pseudomonas aeruginosa through a fed-batch (aerobic–anaerobic) fermentation process over six days. The study aimed to evaluate the use of POME as the sole carbon source for PHA synthesis by Pseudomonas aeruginosa through a fed-batch aerobic–anaerobic fermentation process. The total substrate volumes used in this study were 30, 60, and 90% (v/v), which were gradually added (fed-batch) at rates of 5, 10, and 15% (v/v)/day over the six-day fermentation period. The analytical results showed significant reductions in BOD (Biological Oxygen Demand), COD (Chemical Oxygen Demand), ammonia (NH3), and total suspended solids (TSS) after the fermentation process, indicating that organic and chemical compounds were degraded during fermentation. PHA production from POME showed that the maximum yield occurred on the third day, with 16.89 g/kg dry biomass and a PHA concentration of 9.089 wt% (1.53 g/kg) from a total substrate volume of 9 L. The fermentation process reached the exponential phase on the third day, declined on the fourth day, and stabilized by the sixth day, with an average yield of 5.248 wt%. Characterization using X-ray diffraction (XRD) confirmed that the produced PHA had a structure consistent with standard PHA. Further analysis of water absorption and biodegradability showed fluctuating results, with the best performance observed at a 5% concentration, indicating low water absorption and good biodegradability. In addition, the bioplastic produced had a tensile strength of 554.32 MPa and a modulus of elasticity of 5834.95 MPa.

Pelatihan Pembuatan Temulawak Serbuk Instan di Daerah Lubuk Minturun Kecamatan Koto Tangah Kota Padang Futeri, Renny; Syafrinal, Syafrinal; Riani, Pevi; Armin, M. Ikhlas; Samah, Selfa Dewati; Putri, Melysa; Anwar, Hazil
Journal of Industrial Community Empowerment Vol. 1 No. 1 (2022)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/jice.v1i1.91

Curcuma can be used to maintain and improve body health as well as treat disease. Instant powdered curcuma drink is one of the curcuma plant's processed products. People in the Lubuk Minturun Koto Tangah District, Padang City have natural and human resources that can be utilized through training programs for creating instant powdered curcuma. This exercise drew a total of 25 women, including housewives and teenagers. There are three steps to this community service activity: lectures, demonstrations, and practice. Because the production method is simple and the tools and materials required are readily available, more than 90% of the participants in this activity were able to comprehend the process of making instant powdered curcuma. It is intended that by participating in this activity, the community would be able to increase entrepreneurial prospects and so boost the economy.

Teknologi Tepat Guna Produksi Sabun Batang Dari Minyak Jelantah di Padang Pariaman Riani, Pevi; Putri, Melysa; Futeri, Renny; Armin, M. Ikhlas; Samah, Selfa Dewati; Syafrinal, Syafrinal; Hafnimardiyanti, Hafnimardiyanti
Journal of Industrial Community Empowerment Vol. 1 No. 2 (2022)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/jice.v1i2.143

Ramuak cracker is one of the main product of Toboh Mandailing, Balai Baru, VII Koto Sungai Sariak, Padang Pariaman, West Sumatera. One of the obstacles faced by the cracker industry players is the amount of used cooking oil produced. Used cooking oil is leftover frying oil that has been repeatedly used. If it continues to be consumed, it will be harmful to health. If discharged into the environment, it will cause environmental pollution. Therefore, the Community Partnership Program Team of the Politeknik ATI Padang provided counseling about the dangers of used cooking oil and efforts to process used cooking oil into something useful, namely producing bar soap with used cooking oil as its raw material. The step of making bar soap from used cooking oil is to slowly dissolve the NaOH solution into 500 grams of used cooking oil, then stir using a stainless steel stirrer until evenly distributed and there are no more lumps. The next step is to add dyes and fragrances and stir again to form a soap mixture. Do the printing of the soap dough in the mold by coating it with parchment paper. Let stand for 24-48 hours until the saponification process is complete. PKM activities carried out well and smoothly and in accordance with the expected results. Each participant was able to make bar soap from used cooking oil very well. This activity is expected to provide insight, knowledge and input to partners regarding the process of making bar soap from used cooking oil so that it can be used for daily needs and can even be sold as an additional source of income for the community.

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