Garuda - Garba Rujukan Digital

p-Index From 2021 - 2026

4.6

P-Index

This Author published in this journals

All Journal Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Biotropika Jurnal Riset Kimia Jurnal Pengabdian Kepada Masyarakat Universitas Bangka Belitung Agrokreatif Jurnal Ilmiah Pengabdian kepada Masyarakat Elkawnie Jurnal Kimia Mulawarman Pharmascience Chimica et Natura Acta Indonesian Journal of Pure and Applied Chemistry Chemistry Indonesian Journal of Chemical Research Martabe : Jurnal Pengabdian Kepada Masyarakat IKRA-ITH ABDIMAS Indonesian Journal of Chemical Analysis (IJCA) Journal of Tropical Marine Science Stannum : Jurnal Sains dan Terapan Kimia ASEAN Journal of Chemical Engineering Jurnal Abdi Insani Jurnal Sains dan Edukasi Sains SPIN: Jurnal Kimia & Pendidikan Kimia Jurnal Pijar MIPA Dharma Pengabdian Perguruan Tinggi (DEPATI) Jurnal Pengabdian Pada Masyarakat

Roanisca, Occa

Department Of Chemistry, Faculty Of Engineering, Universitas Bangka Belitung

Author-ID : 2786288

Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Neuroscience Nursing Physics Public Health Social Sciences Transportation Veterinary Other

Published : 42 Documents Claim Missing Document

Claim Missing Document

Articles

1 2 3 4 5

Fenolik Total Fraksi Etil Asetat Daun Pelawan (Tristaniopsis merguensis Grifft.) Robby Gus Mahardika; Occa Roanisca; Fajar Indah Puspita Sari
Jurnal Sains dan Edukasi Sains Vol 3 No 1 (2020): Jurnal Sains dan Edukasi Sains
Publisher : Faculty of Science and Mathematics, Universitas Kristen Satya Wacana, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24246/juses.v3i1p8-14

Ekstrak aseton didapatkan dari daun Tristaniopsis merguensis Grifft menggunakan metode maserasi. Ekstrak aseton selanjutnya difraksinasi dengan metode partisi cair-cair dengan pelarut etil asetat. Penentuan kadar fenolik total dilakukan berdasarkan metode Follin-Ciocalteu dengan standar asam galat. Hasil penelitian ini menunjukkan bahwa fraksi etil asetat dari ekstrak aseton daun Tristaniopsis merguensis mengandung senyawa fenolik total 86,724 ± 1,83 mg GAE/g fraksi etil asetat kering. Berdasarkan spektrum FT-IR fraksi etil asetat ini mengandung senyawa yang memiliki gugus Ar-OH (fenolik), -OH (hidroksil), C=O (keton) dan C=C (aromatik). Gugus Ar-OH ini yang menandakan adanya senyawa fenolik pada fraksi etil asetat ekstrak aseton daun Tristaniopsis merguensis.

EKSTRAKSI DAUN PELAWAN (Tristaniopsis merguensis)SEBAGAI ANTIOKSIDAN MENGGUNAKAN MICROWAVE ASSISTED EXTRACTION (MAE) Sito Enggiwanto; Fusfita Istiqomah; Kasro Daniati; Occa Roanisca; Robby Gus Mahardika
Indonesian Journal of Pure and Applied Chemistry Vol 1, No 2 (2018)
Publisher : Tanjungpura University

Indonesia is a country that produces a wealth of abundant biodiversity, one of which is a plant that is often cultivated the tree of Pelawan (Tristaniopsis merguensis). Pelawan trees are widely spread in Indonesia one of them found in the forests of the Bangka Belitung island. Therefore, this study aims to identify the secondary metabolites and testing antioxidants in leaf of pelawan extract by comparing methods of Microwave Assisted Extraction (MAE) with maceration method. The resistant leaf used in this study was obtained from Sempan, Bangka Belitung. The observation result shows that the use of MAE method can extract with faster time compared with maceration method. So the MAE method is more effective than the maceration method. The using of MAE method for 30 minutes obtained the highest yield percentage of 41.3% in ethanol solvent which is more effective than acetone solvent. Extraction by using 48 hour maceration yields is 28.985%. While the extraction with 30 minute maceration is 13.385%. Testing of antioxidant activity using Microwave Assisted Extraction (MAE) method on acetone solvent has the highest antioxidant activity than ethanol extract that is 9,501 μg/mL. The use of the MAE method is more efficient in extracting the leaves of Pelawan than the maceration method when viewed from the time and antioxidant activity.

Total Phenolic and Antioxidant Capacity of Acetone Extract of Tristaniopsis merguensis Leaves Occa Roanisca; Robby Gus Mahardika; Fajar Indah Puspita Sari
Stannum : Jurnal Sains dan Terapan Kimia Vol 1 No 1 (2019): Oktober
Publisher : Department of Chemistry - Universitas Bangka Belitung

The purpose of this study was to determine the total phenolic and antioxidant capacity of Tristaniopsis merguensis leaf acetone extract. In this study extraction using the maceration method for 3 days with a ratio of dry leaves and solvents of 1: 10 (w / v). Analysis of total polyphenols in this study was carried out using the Follin-Ciocalteu method. Total polyphenols were measured based on gallic acid standards. The antioxidant capacity is calculated based on the DPPH method. The results of this study, obtained extract yield of 9.34%. The total phenolic content of the Tristaniopsis merguensis leaf acetone extract was 215.22 mg GAE / g DW. While the antioxidant capacity of the acetone extract has an IC50 value of 22,1454 µg / mL.

Nanoemulsi Fraksi Daun Pelawan (Tristaniopsis merguensis Griff) Sebagai Antidiabetes Ary Samsiar; Robby Gus Mahardika; Occa Roanisca
Stannum : Jurnal Sains dan Terapan Kimia Vol 3 No 2 (2021): Oktober 2021
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v3i2.2290

Diabetes mellitus is an increased level of sugar in the blood and the secretion of glucose in the urine due to metabolic disorders of insulin secretion. Efforts to treat diabetes mellitus can be done with therapy and drugs, but this can cause side effects. Diabetes can also be treated using herbal ingredients from nature. This study aims to determine the potential of pelawan leaves as an antidiabetic in the form of nanoemulsion.The pelawan leaves were extracted with acetone, then partitioned using MeOH solvent: water, again partitioned with ethyl acetate, then partitioned with n-hexane solvent. The nanoemulsion was prepared using a homogenizer at a stirring speed of 8000 rpm for 30 minutes with a composition of 2.5 ml VCO, 10 ml tween 80 and 37.5 ml water. Nanoemulsion from the MeOH: water and ethyl acetate fraction had better characteristics than the n-hexane fraction nanoemulsion. MeOH fraction nanoemulsion: water has a particle size of 123.8 nm, while ethyl acetate has a particle size of 153.9 nm. Meanwhile, the n-hexane nanoemulsion preparation had the characteristics of a larger particle size, namely 361 nm, and had a polydispersity index of 0.625 nm. The antidiabetic test using ethyl acetate fraction can inhibit α-glucosidase by 1.075% at a concentration of 2.5 mg / ml.

Phytochemical Analysis and Antifungal Activity of Phoebe excelsa Nees Leaf Extract Anis Nurohma; Occa Roanisca; Ristika Oktavia Asriza
Stannum : Jurnal Sains dan Terapan Kimia Vol 4 No 1 (2022): April 2022
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v4i1.2484

Candidiasis is an infection caused by the fungus Candida albicans. Candidiasis was recorded in the second highest position as an infectious disease that accompanies HIV/AIDS, as many as 266 cases. Candidiasis is the highest infection caused by fungi and is opportunistic. Infections caused by candida albicans can generally be treated with antifungal medications. However, the use of drugs in the long term can cause resistance to these drugs, besides antifungal drugs can also cause various side effects. Therefore, in this study, an assessment of the phytochemicals of the ethanol extract of medang sang’s leaves and its bioactivity as antifungal Candida albicans will be carried out. Testing the content of secondary metabolites in medang’s leaves was carried out qualitatively by observing changes in the sample when reacted with reagents. Testing the antifungal activity of the ethanol extract of medang sang’s leaves was carried out in-vitro using the disc diffusion method. Results Based on the test, the ethanol extract of medang sang’s leaves contains alkaloids, flavonoids and tannins. The results of testing the antifungal activity of Candida albicans showed no inhibition, this was because the tang compound contained in the ethanol extract of medang sang’s leaves did not have antifungal activity against Candida albicans.

Microwave-Assisted Extraction of Polyphenol Content from Leaves of Tristaniopsis merguensis Griff. Robby Gus Mahardika; Occa Roanisca
ASEAN Journal of Chemical Engineering Vol 19, No 2 (2019)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Tristaniopsis merguensis Griff. is a species of the Myrtaceae family and has been widely used by people of Bangka Belitung as a traditional medicine to reduce cholesterol, gastric pains, and improve cardiac performance. Extraction methods are the crucial efficacy of herbal medicine. The conventional method, like maceration, takes a long time. In this study, the leaves of Tristaniopsis merguensis were extracted using Microwave-Assisted Extraction (MAE) to reduce extraction time. The extraction using MARS (Microwave Accelerated Reaction System) 6 by CEM Corporation with time variation times of 5, 10, 15, 30 min with temperature of 60, 80, 100oC at 1200 W. The yield using acetone extraction of Tristaniopsis merguensis leaves increases with time and temperature. The extraction dependent on solvent extraction, polar solvent like ethanol, and methanol were higher than semi-polar solvents like acetone and ethyl acetate. The polyphenol content of acetone extract using MAE (10 min, 80oC) was found to be 234.67 mg Gallic Acid Equivalent per gram (GAE/g); it was higher than acetone extract using maceration. The phytochemical results show there are no difference in the active compound using MAE and maceration, i.e. alkaloids, tannin, and flavonoids. Yield extraction, time, and phytochemical results of MAE are more favorable than a maceration.

Komersialisasi Produk dan Pendampingan PIRT sebagai upaya Peningkatan kualitas Perekonomian Kelompok Usaha melati Christianingrum Christianingrum; Occa Roanisca; Hidayati Hidayati
IKRA-ITH ABDIMAS Vol 4 No 3 (2021): IKRAITH-ABDIMAS No 3 Vol 4 November 2021
Publisher : Universitas Persada Indonesia YAI

Pengabdian masyarakat yang di laksanakan adalah Pendampingan Kelompok Usaha Melati Melalui Komersialisasi Produk dan bertempat di daerah Kace Timur. Kace Timur adalah Desa Binaan dari Fakultas Ekonomi Universitas Bangka Belitung. Keberadaan akademisi di kampus diharapkan dapat memberikan kontribusi pembangunan dan pengembangan masyarakat disekitarnya. Oleh karena itu Prodi Manajemen yang merupakan salah satu program studi yangberada dibawah Fakultas Ekonomi mencoba untuk melaksanakan pengabdian yaitu memberikan pendampingan tentang komersialisasi produk, pendampingan pengajuan PIRT untuk kelompok usaha Melati, serta pendampingan untuk mempersiapkan 10 kelompok usaha yang bernaung dibawah kelompok Usaha Melati Agar siap untuk mengusulkan sertifikasi Halal, hal ini perlu dilakukan mengingat pada tahun 2022 usaha UKM dan IKM sudah harus memiliki sertifikasi Halal. Manfaat dimilikinya sertifikat halal adalah untuk melindungi konsumen muslim terhadap produk makanan dan minuman yang tidak halal, memberikan rasa aman dan nyaman bagi konsumen untuk mengkonsumsi produk makanan dan minuman, karena tidak ada keraguan lagi bahwa produk tersebut terindikasi dari hal-hal yang diharamkan, selain itu sertifikat halal juga memberikan keuntungan bagi para pelaku usaha, karena dengan adanya sertifikat halal maka konsume akan lebih yakin terhadap produk yang akan dibeli dan dikonsumsi

Application of Mangrove Processing as a Value-Added Product for The Community in Belinyu District, Bangka Regency Irma Akhrianti; Occa Roanisca; Andi Gustomi
Jurnal Pengabdian Kepada Masyarakat Universitas Bangka Belitung Vol 9 No 1 (2022): Jurnal Pengabdian Kepada Masyarakat Universitas Bangka Belitung
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jpu.v9i1.3488

Air Jukung Village is one of the villages located in Belinyu District, Bangka Regency, Bangka Belitung Islands Province which is rich in potential mangrove resources but has not been optimally utilized by the local community in the Covid 19 pandemic era. One of the potential developments of mangrove areas that can be used as superior products of Air Jukung Village is the utilization of perepat fruit and nipah fruit into syrup as a value-added product. The method of implementing this activity consists of preparation, implementation and evaluation. This service program has several stages of activities including 1) efforts to increase public understanding and awareness of the potential / benefits of mangrove fruit to be processed into value-added products through exploration and incidental socialization / counseling activities, 2) increasing community skills through providing training in making syrup from nipah fruit. This service activity provides good results where there is an increase in understanding, knowledge about the potential utilization, and skills in processing mangrove fruit into value-added products which are expected to become one of the superior products of the Belinyu Community that can improve the regional economy.

Uji Total Fenolik dan Aktivitas Antioksidan Ekstrak Batang Bajakah (Spatholobus littoralis Hassk.) Sari Wulan; Occa Roanisca; Nurhadini Nurhadini
Stannum : Jurnal Sains dan Terapan Kimia Vol 4 No 2 (2022): Oktober 2022
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v4i2.3265

Diseases in the human body can be caused by free radicals. Environmental conditions and unhealthy lifestyles cause the human body's defense system against free radicals to become weaker, so it is necessary to have external antioxidants to help ward off free radicals. Therefore, it is necessary to have natural antioxidants from plants in overcoming free radicals. This study aims to determine the levels of phenolic contained in the ethanol extract of bajakah stems and their potential bioactivity as antioxidant. Determination of phenolic content was carried out using the Folin-Ciocalteau method and antioxidant testing was carried out using the DPPH method. The total phenolic test results obtained were 21.535 mg EAG/g. The antioxidant test of the ethanol extract of the bajakah stem showed weak activity with an average IC50 value of 281,717 g/mL.

Pendampingan Pembuatan Disinfektan dan Pembersihan Lingkungan dalam Upaya Pencegahan Covid-19 di Kelurahan Parit Padang Kecamatan Sungailiat Kabupaten Bangka Occa Roanisca; Robby Gus Mahardika; Nosa Mayasani
Dharma Pengabdian Perguruan Tinggi (DEPATI) Vol 1 No 1 (2021): Mei 2021
Publisher : Fakultas Teknik, Universitas Bangka Belitung

Parit Padang is a sub-district located in Sungaliat District, Bangka Regency, Bangka Belitung Islands Province. Parit Padang Village is in the middle of the city of Sungailiat, where the spread of covid-19 will spread faster. In order to prevent covid-19, the students of the Parit Padang Community Service Program at Bangka Belitung University conducted socialization on how to make disinfectants and clean the environment. The method of KKN UBB activities is in the form of socialization and direct practice to the target community. The result of the UBB Community Service Program is that the community understands how to prevent COVID-19 by using disinfectants to clean the surface of objects that are often physically contacted, and understand how to make disinfectants. The environmental cleaning activities of Parit Padang were carried out with the residents. The Parit Padang community really welcomes the mutual cooperation activities carried out with UBB KKN students.

Co-Authors Addela Amelia Adibrata, Sudirman Adisyahputra Adisyahputra, Adisyahputra Andi Gustomi Anis Nurohma Aprilia, Selvy Ary Samsiar Candra Candra Christianingrum Della Adelia, Della Delvia Safitri Devi Valeriani Dewi Septia Ningsih Elicia, Resta Ependi, Eresti Eresti Ependi Eva Helda Fahrul Syarif, Ahmad Fajar Indah Puspita Sari Fajar Indah Puspita Sari Fajar Indah Puspita Sari Fika Dewi Pratiwi Firstin Rizki Annisa Hasibuan Fransiska, Destalia Fuad, Akmal Nur Fusfita Istiqomah Henri Henri Henri Henri, Henri Herry Marta Saputra Hidayati Hidayati Irma Akhrianti Kasro Daniati Layal, Kamalia Lestari, Dea Lingga, Rahmad Maya Yusnita Nosa Mayasani Notonegoro, Hartoyo Nurhadini Nurhadini Nurhadini Rani Rani RANI RANI, RANI Ristika Oktavia Asriza Robby Gus Mahardika Robiana, Sella Sari Wulan Sari, Ratih Puspita Selvy Aprilia Sembiring, Rinawati Siti Aisyah Siti Aisyah Sito Enggiwanto Sri Rizki Pratiwi Surtina, Surtina Swandi, Monica K. Widia Widia Yana M. Syah Yana M. Syah Yulia Yulia Zulita, Zulita

Title

Found 42 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 42 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 42 Documents
Search