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All Journal Jurnal Pengabdian Kepada Masyarakat Universitas Bangka Belitung Indonesian Journal of Chemical Science Jurnal Sains Teknologi dan Lingkungan (JSTL) SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Martabe : Jurnal Pengabdian Kepada Masyarakat Indonesian Journal of Chemical Analysis (IJCA) JEDCHEM (JOURNAL EDUCATION AND CHEMISTRY) Stannum : Jurnal Sains dan Terapan Kimia Jurnal Abdi: Media Pengabdian Kepada Masyarakat Jurnal Natural SPIN: Jurnal Kimia & Pendidikan Kimia Jurnal Ilmiah Berkala: Sains dan Terapan Kimia Jurnal Riset Fisika Indonesia Media Bina Ilmiah Dharma Pengabdian Perguruan Tinggi (DEPATI) Journal of The Indonesian Society of Integrated Chemistry
Ristika Oktavia Asriza
Jurusan Kimia, Fakultas Teknik, Universitas Bangka Belitung
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Analisis Sifat Mekanik dan Permukaan pada Degradasi Plastik Konvensional Ristika Oktavia Asriza; Nurhadini Nurhadini; Qothrunnada Nur Azizah; Amelia Narulita
Jurnal Riset Fisika Indonesia Vol 4 No 1 (2023): Desember 2023
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v4i1.4645

Abstract

Currently, plastic waste that decomposes for a long time can damage the environment and natural ecosystems. therefore, an innovation was made to create an environmentally friendly plastic that decomposes faster in nature. The purpose of this research is to determine the degradation ability of environmentally friendly conventional biodegradable plastics. This research uses environmentally friendly conventional plastic materials. This plastic is degraded in 3 (three) ways, namely photodegradation (irradiation with UV C light), irradiation with sunlight, and biodegradation. Each degradation process lasts for 30 days. The research results showed that there was a decrease in the elongation at break value of plastic that had been degraded. This is caused by the breaking of bonds in the polymer chain. Apart from that, the plastic also experiences damage to its surface. This damage is characterized by cracks, the appearance of stains, and the appearance of mold or microorganisms on the plastic surface.
THE INFLUENCE OF PLASTICIZER TYPE ON THE CHARACTERISTICS OF BIOPLASTICS MADE FROM TARO TUBER STARCH (Colocasia esculenta (L.) Schott) WITH THE ADDITION OF CANE DRAGUE CELLULOSE Sari, Syifa Aulia Permata; Asriza, Ristika Oktavia; Adisyahputra
SPIN JURNAL KIMIA & PENDIDIKAN KIMIA Vol. 5 No. 2 (2023): Juli - Desember 2023
Publisher : UIN Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/spin.v5i2.8211

Abstract

The problem of plastic waste is currently still the main trigger of environmental pollution, its nature that is not easily degraded will produce more waste. One alternative to overcome this problem is to reduce the use of conventional plastics and develop plastics that are more environmentally friendly or also known as bioplastics. In this study, bioplastics made from taro tuber starch with the addition of bagasse cellulose filler were varied based on the type of plasticizer in the form of glycerol, sorbitol, and propylene glycol. The resulting bioplastics were characterized by FTIR analysis, tensile strength test, TGA test, and water absorption test. The process began with cellulose isolation from sugarcane bagasse which obtained a yield of 24.27%, then taro tuber starch extraction with a yield of 27.87%. The results of the FTIR spectrum of bioplastics did not show significant differences in the absorption of wave numbers for each variation of plasticizer types. The functional groups seen from the FTIR results are O-H, C-H, and C-O groups. Bioplastics with the addition of propylene glycol plasticizer have a high tensile strength value of 23.26 Mpa, good thermal resistance with a mass reduction of 75.89%, and an optimum absorption capacity of 29.4%. In future research, it is necessary to vary the concentration of each type of plasticizer and conduct a simple degradation test
The Effect Of ZnO Mass Variation On Chitosan/ZnO/Cellulose Acetate Composites From Citronella Waste As A Mask Filter Material Nadia, Nadia; Asriza, Ristika Oktavia; Adisyahputra, Adisyahputra
Jurnal Sains dan Terapan Kimia Vol 18, No 1 (2024)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v18i1.17305

Abstract

ABSTRACT Air is an important component that affects human survival, but air quality in Indonesia has greatly decreased due to air pollution. This study used chitosan / ZnO / cellulose acetate composite membranes made from citronella waste as mask filters with ZnO variations of 1%, 2%, and 3%. Composite membranes are made by the phase inversion method and characterized by FTIR, tensile, SEM, and antibacterial tests. Optimum conditions based on the formation of pores measuring 0.17 μm are found in chitosan/ZnO/Cellulose Acetate composite membranes with a  variation of  3%  ZnO. In addition, this variation also has good mechanical properties, with an elongation value of 2.1177% and an elastic modulus of 6.5560 N/m². Based on antibacterial tests, the composite membrane of the 3% ZnO variation also showed the ability to increase antibacterial activity with moderate antibacterial inhibitory strength. Keywords: Composite, Filter Mask, Cellulose Acetate, Chitosan, ZnO
The Effect of Harvest Time of Sapu-Sapu Leaves (Baeckea frutescens L.) the Yield, Characteristics and Composition of Essential Oils Extached Using Steam-Hydro Distillation Method Elicia, Resta; Roanisca, Occa; Asriza, Ristika Oktavia
Indonesian Journal of Chemical Analysis (IJCA) Vol. 7 No. 2 (2024): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol7.iss2.art10

Abstract

The sapu-sapu plant (Baeckea frutescens L.) is widespread in the Bangka Belitung Islands Province, thriving in sandy areas such as beaches and highlands with less fertile soil. This study aimed to determine the optimal harvest time for sapu-sapu leaves to obtain essential oils' highest yield and most desirable characteristics. The research focused on the duck-type sapu-sapu leaves, using five variations of harvest time (coded as A1, A2, A3, A4, and A5, representing leaves harvested at 1, 2, 3, 4, and 5 months of growth, respectively). Essential oil extraction was performed using the steam distillation method. The resulting oils were then analyzed using Gas Chromatography-Mass Spectrometry (GC-MS) to determine their chemical composition. The results showed that sample A1 (1-month growth) produced the highest essential oil yield at 0.74% (w/w). This sample also exhibited the most optimal essential oil characteristics: clear yellow color, characteristic sapu-sapu odor, warm bitter taste, solubility in 96% ethanol at 1:13, specific gravity of 0.8863 g/mL, optical rotation of (+) 10.28°, and refractive index of 1.474. GC-MS analysis revealed that the main compounds in the A1 sample were α-pinene (43.84%), β-pinene (13.56%), and 1,8-cineol (24.26%). The study concluded that while the variation in harvest time of sapu-sapu leaves did not significantly affect the yield, characteristics, or composition of the essential oils, there were slight differences in yield and color. Sample A1, representing the youngest leaves, produced the most optimal results.
COMPARISON OF THE AGE OF SAPU-SAPU (Baeckea frutescens L.) LEAVES BOW DOWN AND UNBOWED ON THE YIELD AND PHYSICAL FEATURES OF OIL USING STEAM-HYDRO DISTILLATION METHODS Adelia, Della; Occa Roanisca; Ristika Oktavia Asriza
SPIN JURNAL KIMIA & PENDIDIKAN KIMIA Vol. 7 No. 1 (2025): January - June 2025
Publisher : UIN Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/spin.v7i1.12944

Abstract

Minyak atsiri merupakan minyak yang bersifat volatil, tersusun dari senyawa golongan terpenoid (monoterpen dan seskuiterpen). Salah satu tumbuhan yang berpotensi dijadikan minyak atsiri adalah tumbuhan sapu-sapu (Baeckea frutescens L.) Kepulauan Bangka Belitung. Tujuan dari penelitian ini untuk mengetahui perbandingan rendemen, karakteristik, dan komponen senyawa kimia dalam minyak atsiri daun sapu-sapu merunduk dan tidak merunduk pada umur panen di atas dan kurang dari 2 tahun. Metode yang digunakan dalam penelitian ini adalah destilasi uap air. Rendemen minyak atsiri yang dihasilkan dari tumbuhan sapu-sapu daun merunduk di atas 2 tahun (DM+2), daun tidak merunduk di atas 2 tahun (DTM+2), daun merunduk kurang dari 2 tahun (DM-2) dan daun tidak merunduk kurang dari 2 tahun (DTM-2) berturut-turut adalah 0,598%, 0,595%, 0,505% dan 0,544%. Minyak atsiri dari daun sapu-sapu merunduk di atas 2 tahun memiliki aroma dan warna lebih dominan dibandingkan dengan yang lainnya. Komponen senyawa kimia yang dihasilkan dari empat variasi minyak atsiri ini berbeda-beda. Minyak atsiri daun sapu-sapu jenis merunduk di atas 2 tahun memiliki total persentase komponen senyawa kimia area sebesar 97,49% dan merunduk kurang dari 2 tahun sebesar 97,74%. Sedangkan komponen senyawa kimia minyak atsiri daun sapu-sapu jenis tidak merunduk di atas 2 tahun sebesar 98,54% dan tidak merunduk kurang dari 2 tahun sebesar 98,38%.   Essential oil is a volatile oil, composed of terpenoid group compounds (monoterpenes and sesquiterpenes). One of the plants that has the potential to be used as an essential oil is the Bangka Belitung Islands sapu-sapu plant (Baeckea frutescens L.). The purpose of this study was to determine the comparison of yield, characteristics, and components of chemical compounds in the essential oil of sapu-sapu leaves, ducking and not ducking at harvest ages above and below 2 years. The method used in this research is the water vapor distillation method. The yield of essential oil produced from sapu-sapu leaves ducked above 2 years (DM+2), leaves not ducked above 2 years (DTM+2), leaves ducked less than 2 years (DM-2) and leaves not ducked less than 2 years (DTM-2) are 0.598%, 0.595%, 0.505% and 0.544% respectively. Essential oil from sapu-sapu leaves ducked over 2 years has a more dominant aroma and color compared to the others. The components of chemical compounds produced from the four variations of essential oil are different. Essential oil of sapu-sapu leaf type aged for more than 2 years has a total percentage of chemical compound components of 97.49%, while that aged for less than 2 years has a total rate of 97.74%. While the chemical compound component of the essential oil of sapu-sapu leaves of the type that does not bow above 2 years is 98.54%, and does not bow less than 2 years is 98.38%.
FORMULASI SEDIAAN GEL HAND SaNITIZER DARI EKSTRAK DAUN PUCUK IDING-IDING (Stenochlaena palustris) sebagai antiseptik alami Fahmi Rizal; Verry Andre Fabiani; Fajar Indah Puspitasari; Ristika Oktavia Asriza
Media Bina Ilmiah Vol. 19 No. 11: Juni 2025
Publisher : LPSDI Bina Patria

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

Abstract

The use of local plants in the Bangka Belitung islands, such as shoots of idat (Cratoxylum glaucum), pelawan (Tristaniopsis spp) and shoots of iding-iding (Stenochlaena palustris) has been practiced by local people for a long time as medicinal plants and vegetables. The three plants are natural ingredients that have been studied and contain very high antioxidant and antibacterial compounds. Iding-iding shoots (Stenochlaena palustris) have antimicrobial uses but their use as antiseptics has not been carried out. Iding-iding shoots have been studied to contain many flavonoids, polyphenols, hydroxycinnamic acid and anthrocyanins. In this study, the formulation of hand sanitizer gel preparations from iding-iding leaf extract (Stenochlaena palustris) as a natural antiseptic with varying concentrations in inhibiting the growth of Escherichia coli and Staphylococcus aureus will be carried out in this study. So far, there has been no research using iding-iding leaf extract (Stenochlaena palustris) in hand sanitizer gel preparations. The results showed that the leaf extract of iding-iding shoots had excellent bacterial inhibition at a concentration of 5% on E.Coli and S.Aureus bacteria.
Analisis Sifat Mekanik dan Permukaan pada Degradasi Plastik Konvensional Asriza, Ristika Oktavia; Nurhadini, Nurhadini; Azizah, Qothrunnada Nur; Narulita, Amelia
Jurnal Riset Fisika Indonesia Vol 4 No 1 (2023): Desember 2023
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v4i1.4645

Abstract

Currently, plastic waste that decomposes for a long time can damage the environment and natural ecosystems. therefore, an innovation was made to create an environmentally friendly plastic that decomposes faster in nature. The purpose of this research is to determine the degradation ability of environmentally friendly conventional biodegradable plastics. This research uses environmentally friendly conventional plastic materials. This plastic is degraded in 3 (three) ways, namely photodegradation (irradiation with UV C light), irradiation with sunlight, and biodegradation. Each degradation process lasts for 30 days. The research results showed that there was a decrease in the elongation at break value of plastic that had been degraded. This is caused by the breaking of bonds in the polymer chain. Apart from that, the plastic also experiences damage to its surface. This damage is characterized by cracks, the appearance of stains, and the appearance of mold or microorganisms on the plastic surface.
Co-Authors Addela Amelia Adisyahputra Adisyahputra Adisyahputra, Adisyahputra Adisyahputra, Adisyahputra Amelia Narulita Anak Agung Istri Sri Wiadnyani Anggraeni Anggraeni Anis Nurohma Ary Samsiar Azizah, Qothrunnada Nur Della Adelia, Della Devi Valeriani Diah Humaira Dinda Liyana Elicia, Resta Eva Helda Eva Julianti Fahmi Rizal Fajar Indah Puspita Sari Fajar Indah Puspita Sari Herry Marta Saputra Janiar Pitulima Karnelasatri, . Ken Ayu Ken Ayu Layal, Kamalia Maudi Aulia Nadia Nadia Narulita, Amelia Nurhadini Nurhadini Qothrunnada Nur Azizah Restani Eka Putri Rizka Felly Roanisca, Occa Robby Gus Mahardika Ropalia, Ropalia Sari, Syifa Aulia Permata Shania Sakhila Shelly Victory Soluna Desbait Hutagalung Sri Hawa T Insan Verry Andre Fabiani Zomi Zomi