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All Journal JURNAL KIMIA SAINS DAN APLIKASI MARINA CHIMICA ACTA POSITRON Jurnal Kimia Khatulistiwa Equator Journal of Management and Entrepreneurship Protobiont: Jurnal Elektronik Biologi SEMIRATA 2015 Journal of Tropical Biodiversity and Biotechnology Jurnal Farmasi Sains dan Komunitas Journal Of Chemical Process Engineering (JCPE) ALCHEMY Jurnal Penelitian Kimia Indonesian Journal of Chemistry Indonesian Journal of Pure and Applied Chemistry Martabe : Jurnal Pengabdian Kepada Masyarakat Walisongo Journal of Chemistry Jurnal Kartika Kimia Molekul: Jurnal Ilmiah Kimia Portal: Jurnal Teknik Sipil Bappenas Working Papers Abdimas Galuh: Jurnal Pengabdian Kepada Masyarakat Jurnal Abdimas ADPI Sains dan Teknologi Jurnal PkM (Pengabdian kepada Masyarakat) Jurnal Teknologi Jurnal Akademika Kimia Molekul: Jurnal Ilmiah Kimia Jurnal Akademika Kimia Jurnal Sipil Sains Terapan

Gusrizal Gusrizal

Department Of Chemistry, Faculty Of Mathematics And Natural Sciences, Universitas Tanjungpura, Jl. Prof. Dr. H. Hadari Nawawi, Pontianak 78124, Indonesia

Author-ID : 209683

Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Physics Social Sciences

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SINTESIS DAN STUDI STABILITAS NANOPARTIKEL PERAK TERTUDUNG ASAM SALISILAT Rizky Noviani Ridwan; Gusrizal Gusrizal; Nurlina Nurlina; Sri Juari Santosa
Indonesian Journal of Pure and Applied Chemistry Vol 1, No 3 (2018)
Publisher : Tanjungpura University

Silver nanoparticles capped with salicylic acid have been synthesized by reduction of silver nitrate with salicylic acid without additional capping agent. In the formation of silver nanoparticles, the solution of silver nitrate was first mixed with the pH 11 salicylic acid solutions at a mole ratio of 1:40. The mixture was heated for 45 minutes in a boiling water bath. The formation of silver nanoparticles was indicated by the appearance of yellow color and monitored using UV-Vis spectrophotometer. The maximum peak of resulted silver nanoparticles appeared in the range of 410-420 nm with the average size of particles was 66±28 nm. Stability test over a period of 16 weeks showed that silver nanoparticles capped with salicylic acid were stable. The results of stability test show that salicylic acid simultaneously act as reducing as well as capping agent in the formation of silver nanoparticles.

PRESISI DAN AKURASI KROMATOGRAFI GAS DALAM PENETAPAN KADAR ASAM PROPIONAT DALAM PRODUKSI BAKERI (PRECISION AND ACCURACY OF GAS CHROMATOGRAPHY FOR DETERMINATION OF PROPIONIC ACID LEVELS IN BAKERY PRODUCT) Nasril Fuad Hasan; Warsidah Warsidah; Gusrizal Gusrizal
Indonesian Journal of Pure and Applied Chemistry Vol 4, No 2 (2021)
Publisher : Tanjungpura University

Percission and accurate gas chromatographic method for determination of propionic acid in bakery products was developed. Bakery productswere directly extraction with ethyl acetat and phosphoric acid used for acidic. The extract was injected directly to gas chromatographic using butyric acid as internal standard. Calibration curve propionic acid range 25 – 1000 µg/mL. Coefissien of variation (CV) rates for spiked bakery produtcs were 1,36% and 99,81% (range 96,32 – 103,61%) for accuracy at ± 1000 mg/kg propionic acid, Limit detection (LoD) and limit quantitation (LoQ) by this method were 333,6537 mg/Kg and 635,5818 mg/Kg. Burger, hot dog, and sandwich buns from a local factory at Pontianak were analyzed and respectively rates less than the limit permitted by Indonesian regulations.

KARAKTERISASI FLAVONOID DARI DAUN MUNDU (Garcinia dulcis [ROXB.] KURZ) SEBAGAI PENGOMPLEKS Pb (II) Emilda Sari; Ari Widiyantoro; Gusrizal Gusrizal
Indonesian Journal of Pure and Applied Chemistry Vol 2, No 1 (2019)
Publisher : Tanjungpura University

Pb (II) merupakan salah satu zat beracun dan berbahaya. Keberadaannya dalam tubuh manusia dapat mengganggu sistem metabolisme tubuh. Penelitian ini bertujuan untuk mengkarakterisasi flavonoid yang diisolasi dari daun mundu (Garcinia dulcis) sebagai pengompleks logam Pb (II). Tahapan penelitian yang dilakukan meliputi persiapan sampel kemudian ekstraksi, isolasi, dan pemurnian senyawa menggunakan metode kromatografi vakum cair (KVC), kromatografi kolom gravitasi (KKG), dan kromatografi lapis tipis (KLT), sedangkan identifikasi senyawa dilakukan menggunakan spektroskopi ultraungu-tampak (UV-Vis) dan inframerah (IR) serta 1H-NMR. Penelitian ini telah berhasil memperoleh 6 fraksi gabungan dari KVC dan 6 fraksi gabungan dari proses KKG. Pada fraksi F4.1 dari KKG dilakukan pemurnian lebih lanjut dengan metode kromatografi lapis tipis (KLT) preparatif sehingga diperoleh 5 isolat. Pada isolat F4.1.3 dilakukan pengujian keberadaan flavonoid dengan uji fitokimia dan hasilnya positif mengandung fenolik dan flavonoid. Selanjutnya isolat tersebut dilakukan pengujian aktivitas pengompleks terhadap logam Pb (II) 100 ppm, 200 ppm dan 300 ppm. Berdasarkan hasil pengujian UV-Vis, isolat F4.1.3 terdapat dua pita pada 287 nm dan 291 nm yang menunjukkan adanya karakteristik senyawa flavonoid. Pergeseran batokromik dari 287 nm dan 291 menjadi 289 dan 293 nm ini setelah penambahan Pb (II) menunjukkan bahwa isolat memiliki kemampuan mengkompleks Pb (II). Hasil analisis spektra inframerah (IR) dan 1H-NMR diduga isolat F41.3 adalah senyawa 5,8,4’–trihidroksi-flavan.

Two Highly Stable Silver Nanoparticles: Surface Plasmon Resonance Spectra Study of Silver Nanoparticles Capped with m-Hydroxybenzoic Acid and p-Hydroxybenzoic Acid Gusrizal Gusrizal; Sri Juari Santosa; Eko Sri Kunarti; Bambang Rusdiarso
Molekul Vol 13, No 1 (2018)
Publisher : Universitas Jenderal Soedirman

Silver nanoparticles capped with m-hydroxybenzoic acid and p-hydroxybenzoic have been successfully synthesized, but the long-term stability data of these silver nanoparticles are not available. In this paper, we report the stability of these two types of silver nanoparticles for a period of 40 weeks observation based on the change of surface plasmon resonance spectra of silver nanoparticles. Silver nanoparticles were synthesized by reduction of silver nitrate with m-hydroxybenzoic acid and p-hydroxybenzoic acid without addition of capping agent. The presence of silver nanoparticles was indicated by the appearance of yellow color due to the surface plasmon resonance of silver nanoparticles. The resulted silver nanoparticles were stored at room temperature and further UV-visible spectrophotometer was used to follow the change in surface plasmon resonance spectra. The surface plasmon resonance spectra of silver nanoparticles were overlapped for the first 18 weeks, followed by little change in the position of absorption maxima (lmax), peak intensity, and width of the absorption peak until the week of 40. Silver nanoparticles capped with m-hydroxybenzoic acid and silver nanoparticles capped with p-hydroxybenzoic acid were highly stable which should make them suitable for further applications. The results show the potential of m-hydroxybenzoic acid and p-hydroxybenzoic acid to become a new reducing agent in the synthesis of highly stable silver nanoparticles. The m-hydroxybenzoic acid and p-hydroxybenzoic acid appeared to act as both reducing and capping agent.

Microbial Degradation of Lignocellulose in Empty Fruit Bunch at Various Incubation Time Noverando Rafiel Angelo; Rudiyansyah Rudiyansyah; Gusrizal Gusrizal
Journal of Tropical Biodiversity and Biotechnology Vol 7, No 2 (2022): August
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtbb.69743

Isolation of cellulose in empty fruit bunch (EFB) is hindered by lignin content. EFB was pretreated with Pleurotus ostreatus which has the ability to degrade lignin, in various incubation times (0th, 15th,30th, 45th, and 60th). The result showed lignin and cellulose decreased from 29.3% to 20.3% and from 40.2% to 26.2%, respectively. The optimum degradation time was on 30th day in which lignin and cellulose contents decreased from 29.3% to 20.3% and from 41% to 39.7% respectively. The cellulose to lignin (C/L) ratio increased from 1.40 to 1.99. These data revealed that P. ostreatus have a high potential for EFB delignification.

Oil Palm Empty Bunch Compost as a Source of Humic Acid Irma D. Oktavianta; Gusrizal Gusrizal; Nurlina Nurlina
Jurnal Akademika Kimia Vol. 9 No. 4 (2020)
Publisher : Universitas Tadulako

Humic acid is a fraction of humic compounds that are part of soil organic matter. In this research, humic acid is extracted from oil palm empty fruit bunches compost. Compost is made from the process of counting the empty oil palm bunches, which are composted until the compost is cooked. The humic acid extraction process uses a strong base extraction method. The principle of humic acid extraction is to dissolve the humic compound with a base solution and then separate it by adding an acid solution (HCl solution). The extraction of humic acid from oil palm empty fruit bunches compost produced blackish-brown humic acid with a yield of 4.895%. The result showed that the main functional group content of palm oil empty fruit bunches compost humic acid was the -OH group and phenol group which had a conjugated carbonyl group and a more aliphatic humic acid structure. Quantitatively, the functional groups of humic acid functional groups each amounted to a total acidity of 7,400 cmol/kg, a carboxylic group of 520 cmol/kg, and a phenolic -OH group content of 6,880 cmol/kg. Research results show that oil palm empty fruit bunches compost can be used as a source of humic acid.

Pelatihan Pengolahan Hasil Laut Menjadi Produk Kaya Gizi dan Kekinian di Kub Mina Sejahtera Desa Penjajap Kecamatan Pemangkat Kabupaten Sambas Nelly Wahyuni; Endah Sayekti; Gusrizal Gusrizal; Titin Anita Zaharah; Risa Nofiani
Jurnal Abdimas ADPI Sains dan Teknologi Vol. 3 No. 1 (2022): Jurnal Abdimas ADPI Sains dan Teknologi
Publisher : Asosiasi Dosen Pengabdian kepada Masyarakat Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47841/saintek.v3i1.91

Penjajap Village, Pemangkat District, Sambas Regency, West Kalimantan is located near the sea. Most of the population are fishermen, either small or medium fishermen. Currently, the village has a joint cooperative, namely KUB Mina Sejahtera Penjajap Village. This cooperative fosters fisherwomen who process processed seafood such as meatballs, frozen meatballs, and nuggets. In order to fulfil nutrition and increase the selling value of marine products, it is necessary to diversify into processed products with complete and contemporary nutritional value. This activity aims to provide training on making dim sum that has complete nutritional content, namely protein, fibre, vitamins, and carbohydrates, and is a contemporary food with a high selling value. The implementation of community service is carried out using the community development method, namely community involvement starting from problem identification and program implementation. In addition, educational methods are used, namely socialization, training and mentoring approaches, as a means of knowledge transfer and education for community empowerment. The evaluation of the activities was carried out using a questionnaire which showed that the participants very much awaited the dim sum-making training because this processed food is very popular, easy to work with, can be applied directly both for daily menus that have complete nutritional content, and has the potential to be sold.

Synthesis of Magnetic Chitosan Composite Beads as an Adsorbent for Removal of Organic Matter from Peat Water Uul Warosatul Ambiya; Nurlina Nurlina; Gusrizal Gusrizal
Jurnal Kimia Sains dan Aplikasi Vol 25, No 9 (2022): Volume 25 Issue 9 Year 2022
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.25.9.338-345

Groundwater in peatlands has the potential to be utilized as a water source, but its high organic matter content presents challenges. This study aimed to improve the quality of peat water through the adsorption of organic matter using chitosan magnetic beads composite adsorbent. Magnetic chitosan beads (KMB) composite was synthesized by mixing chitosan, acetic acid, and a mixture of Fe2+/Fe3+ solution with a mole ratio of 1:2. This mixture was then dropped into a sodium hydroxide solution. In addition to KMB, magnetic composite beads containing glutaraldehyde crosslinking agent (KMBG) were also synthesized. The results of composites analysis using a Fourier transform infrared (FTIR) spectrophotometer showed typical Fe-O absorption bands at 582 cm-1 and 578 cm-1 for KMB and KMBG. The typical C=N absorption band for glutaraldehyde in KMBG appeared at 1631 cm-1. X-ray diffraction (XRD) analysis revealed the characteristic peaks of Fe3O4 for KMB and KMBG at 2θ = 30.2°, 35.5°, 43.2°, 57.0°, and 62.8° with an amorphous structure. The adsorption of organic matter was performed by varying the pH (2, 3, 4, and 5) of peat water and the mass of the adsorbent (50, 70, 100, 200, and 300 mg). The optimum adsorption occurred at pH 2 with an absorbent mass of 0.1 g KMB and 0.07 g KMBG. Applying KMB on peat water reduces turbidity, color, and absorbance at a wavelength of 254 nm (Aλ=254), which is better than using KMBG. These three parameters’ efficiency percentages were 44%, 78%, and 74% for KMB and 17%, 30%, and 59% for KMBG.

Synthesis of Silver Nanoparticles Using Premna serratifolia Linn. Leaf Extract as Reducing Agent and Their Antibacterial Activity Chris Octavianus; Imelda Hotmarisi Silalahi; Gusrizal Gusrizal
Jurnal Farmasi Sains dan Komunitas (Journal of Pharmaceutical Sciences and Community) Vol 19, No 1 (2022)
Publisher : Sanata Dharma University

Premna serratifolia Linn. leaf extract has been used as a reducing agent in the synthesis of silver nanoparticles (AgNPs). Various synthesis parameters such as reaction time, concentration and the pH of the Premna serratifolia Linn. leaf extract, and silver nitrate concentration were investigated. In addition, the stability of synthesized AgNPs and their activity against Staphylococcus aureus and Escherichia coli have also been investigated. The results of the experiment showed that Premna serratifolia Linn. leaf extract reduced silver ions resulting in AgNPs. In addition, the AgNPs colloid showed a gradual change in color from transparent green to yellow. At the same time, its ultraviolet (UV)-Visible spectra exhibited the typical surface plasmon resonance peak at around 400-415 nm. The optimum reaction conditions in the formation of AgNPs are 40 minutes of reaction time using silver nitrate 1.5x10-4 M and Premna serratifolia Linn leaf extract 80 ppm at pH 10. The particle size of synthesized AgNPs distributes from 48.3-157 nm with an average size of 58.7±14.4 nm and is stable at least for 1-month storage under ambient conditions. The antibacterial test shows that synthesized AgNPs are effective against both Escherichia coli and Staphylococcus aureus.

AKTIVITAS TABIR SURYA FRAKSI METANOL DARI DAUN SIMPUR (Dillenia indica Linn.) DAN KARAKTERISASI SENYAWA ISOLATNYA Salatiana Salatiana; Endah Sayekti; Gusrizal Gusrizal
Indonesian Journal of Pure and Applied Chemistry Vol 6, No 1 (2023)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v6i1.63085

Sunscreen activity has been tested on simpur leaves (Dillenia indica Linn.) by determining the value of sun protection factor (SPF), erythema transmission percentage (%Te) and pigmentation transmission percentage (%Tp) of each methanol extract, n-hexane, dichloromethane fraction, and methanol fraction from simpur leaves. This test was carried out using a UV-Vis spectrophotometer (λ = 200-400 nm), a variation of sample concentration of 50; 75 and 100 ppm. The methanol fraction at a concentration of 100 ppm showed the highest SPF value of 4.630 ± 0.043 and the lowest %Te and %Tp values of 32.316 ± 0.297 and 52.699 ± 0.160, respectively. Isolation of flavonoids from the methanol fraction produced a relatively pure isolate (Rf = 0.901) with code G1 in the form of a yellowish-green solid/powder (1.5 mg). Characterization of isolate G1 using the FTIR spectrophotometer showed that there were vibrations of the alcohol O-H groups (3446.79 cm-1), aliphatic C-H (2958.80-2858.51 cm-1), C=C aromatic (1635.64 cm-1), C=C aromatic (1635.64 cm-1), C =O (1730.15 cm-1), C-O alcohol (1122.57 cm-1), and aliphatic C-H (1463.97-1382.96 cm-1). Based on a comparison of the spectra of isolate G1 with the spectra from the literature, isolate G1 was predicted as a flavonoid compound in the flavan or flavanol groups

Co-Authors Abrori, Sayyidus Dzaki Adi Maulana, Adi Ajuk Sapar Alimunddin, Andi Hairil Andi Hairil Alimuddin Andi Hairil Alimuddin Andrian Kaifan Anis Shofiyani AR, Sulaiman Ari Widiyantoro Bambang Rusdiarso Bambang Rusdiarso Chairil Anwar Chris Octavianus Cucu Suhery Devi Wulandari Dwi Yuniarsih Eko Sri Kunarti Eko Sri Kunarti Elvi Rusmiyanto Pancaning Wardoyo, Suci Lestari, Mukarlina, Endah Sayekti Evi Noviani Fikri z.a, Muhammad Aulia Fishal, Fishal Gani, Fauzi A. Hairunnisa Hairunnisa Hamzi Anwari Hanafiah Hanafiah, Hanafiah Hanif Hanif Haris, Raihan Harlia, Harlia Hestivera, Eva Novianti Ibnur Rusi Imelda Hotmarisi Silalahi Irma D. Oktavianta Jasmita, Jasmita Karimuddin, Karimuddin Krisnanti, Gendis Yayi Kurniati Kurniati Lestari, Titiek Mastura, Meila MISWAR MISWAR Miswar, Khairul Muhammad Reza Mulizar Mulizar Muzaffar, Anis Fikri Nasril Fuad Hasan Nelly Wahyuni Normaningsih Rahayu Noverando Rafiel Angelo Nurlina Nurlina Nurlina Nurlina Nurlina, Nurlina Prayitno, Dwi Imam Puji Ardiningsih Putra, Harisal Radianti, Sri Rahayu, Warsi Kurnia Renny Puspita Sari Rinaldi, Muhammad Ikhsan Risa Nofiani Risa Nofiani Rizki Noviani Ridwan Rizky Noviani Ridwan Roberta Anjelia Rudiyansyah Rudiyansyah Rudiyansyah Rudiyansyah Sabardiansyah, Rajab Salatiana Salatiana Saprianti, Siti Sari, Emilda Sari, Gladis Raspida Shofiyani, Anis Siregar, Muhammad Andryansyah Siregar, Muhammad Rizkyansyah Sri Juari Santosa Sri Juari Santosa Sri Juari Santosa ST., MT, Syaifuddin Din Sulaiman Sulaiman Syahbanu, Intan Syarwan, Syarwan Syukri Syukri Thamrin Usman Titin Anita Zahara, Titin Anita Titin Anita Zaharah Ulfa, Nadia Ummi Hanifah Uul Warosatul Ambiya Warsidah Warsidah Wibowo, M. Agus Wibowo, Muhamad Agus Widiyananta, Surya Winda Rahmalia Winda Rahmalia Yudha Arman Yulia Zahara Zaharah, Titin Anita

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