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All Journal KOVALEN: Jurnal Riset Kimia Jurnal Kimia Mulawarman Jurnal Pengabdian kepada Masyarakat Rafflesia Journal of Natural and Applied Sciences (RJNAS) Jurnal Ekonomi, Manajemen, Akuntansi
Syamsuddin Syamsuddin
Jurusan Kimia FMIPA Universitas Tadulako
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Medicine & Pharmacology Public Health Social Sciences Other

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Pemanfaatan Selulosa dari Rumput Gajah (Pennisetum purpureum) pada Sintesis Karboksimetil Selulosa (CMC) : [Utilization of Cellulose from Pennisetum purpureum at The Synthesis of Carboxy Methyl Cellulose (CMC) Erwin Abdul Rahim; Grace Sita Turumi; Syaiful Bahri; Jusman; Syamsuddin
KOVALEN: Jurnal Riset Kimia Vol. 7 No. 2 (2021): Edisi Agustus
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2021.v7.i2.14227

Abstract

Cellulose from Pennisetum purpureum has been used as the main ingredient in the synthesis of carboxymethyl cellulose (CMC). The purpose of CMC synthesis from the cellulose of Pennisetum purpureum is to obtain CMC compounds with the best degree of substitution (DS) value and the highest yield. The study was conducted using a completely randomized design with a factorial pattern consisting of two independent variables, namely the concentration of trichloroacetic acid (10%, 20%, and 30%) and reaction time (3 and 4 hours). The results showed that the CMC with the highest DS value (0.839) was obtained using 20% trichloroacetic acid with a reaction time of 3 hours. The highest CMC yield was 30.15% which was obtained using 30% trichloroacetic acid with a reaction time of 4 hours. Keywords: Pennisetum purpureum, carboxymethyl cellulose, substitution degree.
Pembuatan Konsentrat Protein Ampas Tahu Menggunakan Garam Ammonium Sulfat: Manufacturing of Tofu Pulp Protein Concentrate Using Ammonium Sulphate Nurhaeni; Frischa Sari Kencana; Andi Tenri Ajeng; Khairuddin; Prismawiryanti; Syamsuddin; Dwi Juli Puspitasari; Indriani; Erwin Abdul Rahim
KOVALEN: Jurnal Riset Kimia Vol. 8 No. 1 (2022): April Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2022.v8.i1.15844

Abstract

Tofu pulp which generally becomes waste can be used as a source of protein concentrate. Protein concentrates from tofu pulp have been obtained at various ratios of tofu pulp: ammonium sulfate and ammonium sulfate salt concentration. The research was conducted to obtain the highest protein yield and content of tofu pulp protein concentrate. This study used a completely randomized design (CRD) with the independent variable being the ratio of tofu pulp filtrate: ammonium sulfate (1:2, 1:3, 1:4, 1:5, 1:6, and 1:7 (v/v)) and concentrations of ammonium sulfate (30, 40, 50, 60, 70, and 80%), while the dependent variables were the yield of protein concentrate and protein content. Production of protein concentrate used the salting-out method with ammonium sulfate salt. The ratio of tofu pulp: ammonium sulfate 70% obtained the best ratio of 1:5 with a yield of 41.6% and protein content of 84.58%. Tofu pulp as industrial waste can be a potential source of protein concentrate because it has a high protein content.
DAYA HAMBAT EKSTRAK ETANOL SABUT KELAPA (Cocos nucifera Linn) TERHADAP PERTUMBUHAN Staphylococcus aureus DAN Escherichia coli PADA TAHU Ni Ketut Sumarni; Rahmawati Rahmawati; Syamsuddin Syamsuddin; Ruslan Ruslan
JURNAL KIMIA MULAWARMAN Vol 17 No 1 (2019)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Telah dilakukan pengujian daya hambat ekstrak etanol sabut kelapa (Cocos nucifera Linn) terhadap pertumbuhan Staphylococcus aureus dan Escherichia coli pada tahu. Penelitian ini bertujuan untuk mengetahui konsentrasi ekstrak etanol sabut kelapa yang dapat menghambat pertumbuhan mikroba S.aureus dan E.coli pada tahu. Sabut kelapa diekstrak menggunakan etanol 96% dan di aplikasikan pada tahu dengan variasi konsentrasi 1000 ppm, 2000 ppm, 3000 ppm, 4000 ppm, 5000 ppm, 6000 ppm dan 7000 ppm. Selanjutnya diaplikasikan pada tahu dengan metode cawan menggunakan total plate count. Hasil perendaman ekstrak etanol sabut kelapa terhadap tahu menunjukkan konsentrasi ekstrak yang paling menghambat yaitu pada konsentrasi 7000 ppm dengan waktu 24 jam sebesar 3751 Cfu/mL untuk bakteri S.aureus dan konsentrasi 7000 ppm dengan waktu 96 jam pada bakteri E.coli. Ambang batas cemaran mikroba pada tahu sesuai SNI 2009 nomor 7388 yaitu 5×104 koloni/mL.
PENDAMPINGAN IMPLEMENTASI LESSON STUDY PADA GURU MGMP BAHASA INDONESIA SEBAGAI UPAYA PENINGKATAN KUALITAS PEMBELAJARAN JARAK JAUH Efendi; Syamsuddin; Asrianti
J-ABDI: Jurnal Pengabdian kepada Masyarakat Vol. 1 No. 9: Februari 2022
Publisher : Bajang Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53625/jabdi.v1i9.1256

Abstract

The problems that occurred during the Covid-19 pandemic in the world of education had an impact on the quality of learning. Teachers and students adapt to distance learning which results in the need for a deep comprehensive understanding of effective learning techniques during a pandemic. The collaboration system and understanding of technological literacy are things that can be done to improve the quality of the distance learning process through increasing teachers' understanding of the determination of Lesson Study. This service activity will be held in Blended (online and offline) using socialization and mentoring methods. The implementation of Lesson Study training activities is carried out offline while mentoring and implementation is carried out online. distance learning and (3) giving the teacher real experience in the classroom in developing teaching materials and distance learning according to the needs of students. The results of the service activities show an increase in models and the development of teaching materials in the form of modules in peer teaching to conduct open classes and teachers can make lesson plans according to the scenario collaboratively with cognate maple teachers
Aktivitas Antibakteri Ekstrak Kulit Batang Tumbuhan Johar (Senna siamea Lam) pada Berbagai Polaritas Pelarut : Antibacterial Activity of Johar (Senna siamea Lam) Stem Bark Extract on Various Solvent Polarities Djumidar; Abd. Rahman Razak; Ahmad Ridhay; Ni Ketut Sumarni; Syamsuddin; Jusman; Nurhaeni; Erwin Abdul Rahim
KOVALEN: Jurnal Riset Kimia Vol. 8 No. 2 (2022): August Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2022.v8.i2.15970

Abstract

Johar plant is a type of plant from the Fabaceae family which is widely used in traditional medicine such as malaria, itching and diabetes medicine. This study aims to determine the antibacterial activity of Johar stem bark extract with different levels of solvent polarity on the growth of Staphylococcus aureus and Escherichia coli bacteria and to determine the active compound class by TLC-Bioautography. The extraction of active compounds used a multilevel maceration method starting with n-hexane (non polar), followed by ethyl acetate (semi-polar) and ethanol (polar) solvents. Antibacterial activity testing was carried out by diffusion well method with a concentration variant of 25% and 50%. The results showed that n-hexane, ethyl acetate, and ethanol extract had antibacterial activity against the two test bacteria. Ethyl acetate and ethanol extract from Johar stem bark at a concentration of 50% were classified as very strong antibacterials with inhibition zone diameters against S. aureus, which were 22.02±0.84 mm and 20.16±0.23 mm, respectively. The results of the TLC-Bioautography test showed that the three test extracts had strong antibacterial activity against S. aureus and E. coli. In the n-hexane extract with n-hexane: ethyl acetate (9:1) eluent using Lieberman-Burchard spray reagent, it was suspected that triterpenoid compounds were present. In ethyl acetate extract with n-hexane: ethyl acetate (6:4) eluent and ethanol extract with chloroform: methanol (8:2) eluent using FeCl3 1% spray reagent, it was suspected that the tannin compound was present in both extracts.
Analisis Kadar Kadmium (Cd) dalam Bawang Merah Lokal Palu (Allium cepa L. var. aggregatum) pada Berbagai Lokasi dan Umur Tanam: Analysis of Cadmium (Cd) in Palu Local Shallots (Allium cepa L. var. aggregatum) at Various Locations and Planting Ages Eka Lindawati; Khairuddin Khairuddin; Nurhaeni; Ruslan; Ahmad Ridhay; Husain Sosidi; Erwin Abdul Rahim; Syamsuddin
KOVALEN: Jurnal Riset Kimia Vol. 9 No. 1 (2023): April Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2023.v9.i1.16287

Abstract

The local Palu shallot (Allium cepa L. var. aggregatum) plant is one of the leading products in the Central Sulawesi region. Shallots can experience a decrease in quality if they are contaminated with heavy metals, such as cadmium (Cd) in amounts that exceed the threshold. This study aims to determine the effect of planting age on cadmium levels in local Palu shallots cultivated in Oloboju Village and Solove Village, Biromaru District, Sigi Regency. The research variables used were the planting age which consisted of 4 levels (age 40, 50, 60, and 70 days), and the planting location which consisted of 2 levels (Solove Village and Oloboju Village). Cd levels were analyzed using an Atomic Absorption Spectrophotometer (AAS). Cadmium levels in shallot roots at two planting locations decreased with increasing planting age, from 101.34 - 107.18 mg/kg at 40 days of age to 1.68-3.78 mg/kg at 70 days of age. Shallot bulbs at two locations had lower cadmium levels than roots, namely 0.01-0.04 mg/kg. The results of the study found that planting time had a significant effect on cadmium levels in the roots of shallots, but planting age and planting location had no significant effect on cadmium levels in local Palu shallot bulbs with levels that met the SNI (Indonesian national standard) quality requirements
Characterization Crude Palm Oil (CPO) Olein Fraction As A Raw Material for Cooking Oil Jusman Jusman; Syamsuddin
RAFFLESIA JOURNAL OF NATURAL AND APPLIED SCIENCES Vol. 3 No. 2 (2023): Oktober
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rjna.v3i2.30715

Abstract

Research has been carried out on the characterization of crude palm oil olein fraction as a raw material for cooking oil. In the initial stage, crude palm oil is centrifuged at 4000 rpm for 30 minutes to separate the olein and stearin fractions from crude palm oil. Then the olein fraction is treated using rice husk ash to obtain an olein fraction that meets the standard raw materials for making cooking oil. Therefore, the olein fraction was characterized by measuring several parameters including water content, free fatty acid content, carotenoid content and peroxide value. The results of research on water content are in the range of 0.02 – 0.07% , free fatty acid content is in the range of 0.03 – 0.08%, and peroxide content is in the range of 0.14 – 0.16 meq/kg. Results of research on the characterization of the crude palm oil olein fraction shows parameters that are a reference in determining the quality of cooking oil raw materials that meet the required standards.
Analisis Permintaan Tenaga Kerja Pada Industri Kecil Dan Menengah Di Sulawesi Tengah 2019-2023 Abdul Azis Sapriadi; Santi Yunus; Syamsuddin; Kalvin A. Parinding; Andi Herman Jaya
EKOMA : Jurnal Ekonomi, Manajemen, Akuntansi Vol. 4 No. 2: Januari 2025
Publisher : CV. Ulil Albab Corp

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56799/ekoma.v4i2.7532

Abstract

Industri kecil dan menengah di Sulawesi Tengah dari Tahun 2019-2023 selalu mengalami peningkatan permintaan tenaga kerja dan pengangguran menurun karna adanya penciptakan lapangan pekerjaan. Penelitian ini bertujuan untuk menjelaskan bagaimana pengaruh variabel jumlah industri kecil dan menengah dan nilai produksi terhadap permintaan tenaga kerja di Sulawesi Tengah. Data yang digunakan dalam penelitian ini adalah Data Panel. Hasil penelitian menunjukkan jumlah Industri berpengaruh positif dan signifikan terhadap permintaan tenaga kerja. Nilai Produksi berpengaruh positif akan tetapi tidak signifikan terhadap permintaan tenaga kerja Provinsi Sulawesi Tengah Tahun 2019-2023. Secara simultan atau bersama-sama variabel industri kecil dan menengah dan produksi berpengaruh signifikan terhadap tenaga kerja di Provinsi Sulawesi Tengah Tahun 2019-2023.
Co-Authors Abd. Rahman Razak Abd. Rahman Razak Abdul Azis Sapriadi Ahmad Ridhay Andi Herman Jaya Andi Tenri Ajeng Asrianti Dian Citra Djumidar Dwi Juli Puspitasari Dwi Juli Pusptasari Efendi Eka Lindawati Eka Surya Wahyuningsih Erwin Abdul Rahim Famri Rusdin Fitra Langgeng Mangesti Frischa Sari Kencana Grace Sita Turumi Hardi Ys. Husain Sosidi Indriani Indriani Jaya Hardi Jusman, Jusman Kalvin Albert Parinding Khairuddin Khairuddin Misba Anggriani Moh. Mirzan Muqasyifah Ni Ketut Sumarni ni nyoman rupiniasih Nurhaeni Nurhaeni Parwati Parwati Pratiwi Listyana Sareu Prismawiryanti Prismawiryanti Rahmawati Rahmawati Ruslan Ruslan Santi Yunus Syaiful Bahri Sylvia Florensy Bawias