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All Journal Paduraksa : Jurnal Teknik Sipil Universitas Warmadewa Alchemy : Journal of Chemistry Jurnal Harpodon Borneo Biotropika Jurnal Pendidikan dan Pembelajaran Kimia (JPPK) Jurnal Pengabdian Kepada Masyarakat Universitas Bangka Belitung Agrokreatif Jurnal Ilmiah Pengabdian kepada Masyarakat Elkawnie EduChemia: Jurnal Kimia dan Pendidikan Chimica et Natura Acta Acta Pharmaciae Indonesia : Acta Pharm Indo Indonesian Journal of Pure and Applied Chemistry Chemistry Indonesian Journal of Chemical Research Martabe : Jurnal Pengabdian Kepada Masyarakat Jurnal GEOSAPTA Fullerene Journal of Chemistry ALKIMIA : Jurnal Ilmu Kimia dan Terapan Stannum : Jurnal Sains dan Terapan Kimia ASEAN Journal of Chemical Engineering Jurnal Abdi: Media Pengabdian Kepada Masyarakat EKOTONIA: Jurnal Penelitian Biologi, Botani, Zoologi dan Mikrobiologi Jurnal Sains dan Edukasi Sains Jurnal Pijar MIPA Asian Journal of Health and Applied Sciences Indonesian Journal of Community Empowerment Dharma Pengabdian Perguruan Tinggi (DEPATI) Jurnal Pengabdian Pada Masyarakat Journal of Pharmascience

Robby Gus Mahardika

Departement Of Chemistry, Faculty Of Engineering, Universitas Bangka Belitung Jl. Kampus Peradaban, Merawang, Bangka, 33172

Author-ID : 312021

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Published : 43 Documents Claim Missing Document

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Articles

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Ekstrak Batang Pelawan (Tristaniopsis merguensis Griff.) sebagai Antibakteri pada Staphylococcus aureus dan Escherichia coli Genta Febri Kusuma; Robby Gus Mahardika; Fajar Indah Puspita Sari
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.v4i2.3063

Currently, diseases caused by infection with pathogenic microorganisms are increasing, this is indicated by the increasing interest in antibacterial substances. This research was conducted on the stem of the pelawan plant (Tristaniopsis merguensis Griff.) with the aim of identifying the secondary metabolites contained in the extract of n-hexane, ethyl acetate, and methanol of the stem of pelawan which have the potential to have antibacterial activity. Determination of the profile of the compounds contained in the extract of pelawan stem using a qualitative phytochemical test. Antibacterial test using disc diffusion method. Phytochemical qualitative test showed positive results in the flavonoid and phenol groups. The results of the disc diffusion antibacterial test on the diameter of the inhibitory zone of the stem extract showed that the methanol extract of the stem against the S. aureus had the greatest inhibition against the bacteria S. aureus at a concentration of 10000 ppm with an average inhibitory power of 8.07 mm and against the bacteria E. coli at the concentration of 10000 ppm. concentration of 10000 ppm with an average inhibition of 8.19 mm.

The Effectiveness of Pandan Sea (Pandanus Tectorius) Cellulose Active Charcoal in Reducing BOD, COD, TSS Level’s in Liquid Waste Tapioca Dianti Aviliani; Fajar Indah Puspita Sari; Robby Gus Mahardika
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.v4i2.3326

Tapioca liquid waste contains high organic substances and suspended solids. This research utilizes the cellulose activated charcoal of sea pandan leaves to adsorb the organic matter content and suspended solids. This study aims to determine the lignin and cellulose content of pandan sea leaves before and after delignification, determine characteristics, determine the optimum mass and optimum efficiency of tapioca wastewater adsorption. Analysis of lignin and cellulose content refers to the Chesson method with a decrease in lignin content of 11.5% to 5.4% as cellulose content increases from 65.1% to 83.6%. The results of the characteristics of water content 11.6% and ash content of 4.2%, GSA analysis showed a surface area of 12.6495 m2/g, a total pore volume of 0.0124607 cm3/g which included micropores and an average pore radius of 1.97015 nm. Characterization using FTIR showed cellulose functional groups such as O-H, C-H, CH2, C-O and lignin functional groups, namely aromatic CH. Adsorption was carried out with a mass variation of 1, 5 and 10 grams in 250 ml of tapioca liquid waste for 30 minutes. /L to 5.40 mg/L, TSS 875 mg/L to 9.03 mg/L and optimum efficiency at 10 gram mass with removal of COD 99.64%, BOD 99.81%, TSS 98.94%. The adsorption of cellulose activated charcoal from sea pandan leaves is superior to using microorganisms in tapioca wastewater at PT Sinar Batu Rusa Prima. Further modification is needed in the application of activated charcoal in the waste to produce a colorless filtrate.

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.

Upaya Preventif Masyarakat Srimenanti dari COVID-19 melalui Pembagian Masker dan Handsanitizer Adisyahputra Adisyahputra; Robby Gus Mahardika; Gita Afriza
Dharma Pengabdian Perguruan Tinggi (DEPATI) Vol 1 No 1 (2021): Mei 2021
Publisher : Fakultas Teknik, Universitas Bangka Belitung

Indonesia is currently being shaken by the COVID-19 pandemic, which has infected thousands of people and even died. The government has given an appeal to the community to reduce the spread of the COVID-19 virus. However, not many people have complied with the government's appeal. Especially in Srimenanti Village, very few people know how dangerous the COVID-19 virus is. Therefore it is necessary to understand the health protocol for breaking the COVID-19 chain. Based on these problems, the authors carry out community service through Real Work Lecture (KKN) activities with the theme COVID-19, the method used to support public safety against COVID-19, namely in the form of distribution of masks and hand sanitizers also educating the public about COVID-19. The results show that people who previously did not care about the pandemic are currently progressing and are more concerned about themselves and those around them. Evidenced by always using a mask and hand sanitizer when leaving the house.

Peningkatan Daya Saing UMKM Kelurahan Sri Menanti Melalui Fasilitasi Perolehan Perizinan Dasar Occa Roanisca; Robby Gus Mahardika; Maya Yusnita
Jurnal Pengabdian Pada Masyarakat Vol 7 No 2 (2022): Jurnal Pengabdian Pada Masyarakat
Publisher : Universitas Mathla'ul Anwar Banten

IMPROVING THE COMVETITVENESS OF UMKM IN SRI MENANTI VILLAGE THROUGH FACILITATING THE ACQUISITION OF PRODUCT LEGALITY. Micro, Small and Medium Enterprises (UMKM) have a very strategic role in the people-based economic development in Indonesia. The strengthening of this role must be increased by equipping businesses with permits that have been determined by the Government, such as food safety education certificates, sanitation hygene-worthy certificates, and home industry food production certificates. There are still many UMKM in Sri Menanti Village that do not have these product legality. Therefore, this service activity will facilitate the management of these permits. The method in this service activity is in the form of direct assistance for submissions, facilitation of laboratory testing costs so that all fostered partners obtain these permits. The fostered partners in this activity amounted to seven UMKM determined by the Sri Menanti Village Party. The result of this service activity is that the seven assisted UMKM managed to get these permits. The seven UMKM already have food safety education certificates, two UMKM have received HS-worthy certificates and five other UMKM have received PIRT certificates. Obtaining this license will make it easier for the assisted UMKM to market their products more broadly.

Nanoencapsulation of Simpur (Dillenia indica L.) Leaf Extract For Antibacterial Robby Gus Mahardika; Shania Sakhila; Nurhadini Nurhadini
ALKIMIA Vol 6 No 2 (2022): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19109/alkimia.v6i2.13675

Simpur leaf (Dillenia indica L.) as a traditional medicinal plant spread in the Bangka Belitung Islands. Secondary metabolites contained in simpur leaf extract are alkaloids, flavonoids, phenols, tannins, saponins, steroids, and terpenoids. Compounds that provide pharmacological properties such as polyphenols are unstable to the influence of temperature and high light intensity so that they are easily oxidized. The challenge to protect the damage of these compounds can be done by means of nanoencapsulation. This study aims to determine the size and efficiency of the nanoencapsulation of simpur leaf extract and its antibacterial bioactivity against Staphylococcus aureus and Escherichia coli bacteria. Manufacture of nanoencapsulation using the nanoprecipitation method with the constituent components of PCL (1.5 g), Tween 80 (50 mL), simpur leaf extract (0.15 g; 0.25 g; 0.35 g). Antibacterial activity testing using disc diffusion method. Nanoencapsulated extract mass 0.15 g; 0.25 g; and 0.35 g have sizes of 167.2 nm, respectively; 208.7 nm; and 229.1 nm and encapsulation efficiency of 88.21%; 56.77%; and 5.34%. The antibacterial activity of the nanoencapsulation and extract was more effective in inhibiting the growth of Staphylococcus aureus bacteria than Escherichia coli bacteria. Strength of activity against Staphylococcus aureus bacteria in nanoencapsulated extracts was categorized as moderate to strong and Escherichia coli bacteria in extracts were categorized as moderate.

Synthesis of Diazo Quinolinone Stefan Marco Rumengan; Khoirotul Ummah; Robby Gus Mahardika; Ana Mardliyah; Mariam Ulfah; Ajeng Triane Syawila
Jurnal Kimia Fullerene Vol 8 No 2 (2023): Fullerene Journal of Chemistry
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37033/fjc.v8i2.600

Quinolones are important heterocyclic compounds in medicine and materials for DSSC or OLED. This study aims to make a quinolinone framework that has several functional groups. These functional groups can be coupled with various other heterocyclic compounds. The synthesis of the target compound consists of forming a quinolinone framework using phenyldiamine and ethyl aceto acetate via the Penchmann reaction then iodination using ICl. The Penchmann reaction succeeded in forming a quinolinone framework as indicated by shown a proton signal at 11.22 ppm. The iodination reaction was successfully carried out by adding iodo to the benzene ring and the appearance peak of (M+H) m/z was 300.9839 on mass spectroscopy. The compound 7-amino-8-iodo-4-methyl-2-quinolinone (compound 2) has been successfully synthesized. Compound 2 has 3 functional groups (amine, iodo and alkene) that can be used for coupling with the other heterocycles.

Synthesis of dihydropyrimidinone derivatives using kelubi fruit (Eleiodoxa conferta) as a catalyst and its antibacterial activity Sari, Ratih Puspita; Nurhadini, Nurhadini; Mahardika, Robby Gus
Asian Journal of Health and Applied Sciences Vol. 1 No. 1 (2022): Asian Journal of Health and Applied Sciences (AJHAS)
Publisher : Lighthouse Publishing

Kelubi fruit is one of the many fruits that grow in Bangka Belitung which has a sour taste. Kelubi fruit contains ascorbic acid, malic acid and oxalic acid. The potency and sour taste of Kelubi fruit can be used as a catalyst in the synthesis of dihydropyrimidinone compounds and activity as antibacterial. Dihydropyrimidinone compounds were synthesized using synthesis with the basic ingredients of benzaldehyde, urea and ethyl acetoacetate using natural catalysts that are more environmentally friendly. The purpose of this study was to determine the optimum volume, time and temperature catalyst used by kelubi fruit to synthesize pyrimidine-derived compounds as antibacterial. The optimization results on the synthesis of dihydropyrimidinone compounds using kelubi fruit water as a catalyst (Eleiodoxa conferta) with a lot of 0.3 mL catalyst, temperature of 50ºC and reaction time of 4 hours with yield of 46.75%. Antibacterial activity of dihydropyrimidinone compounds against Stapylococcus aureus bacteria at a concentration of 10 ppm, 30 ppm including the category and a concentration of 75 ppm including the medium category. Antibacterial activity against Eschericia coli bacteria at concentrations of 30 ppm and 75 ppm was categorized as weak.

Peel-off mask formulation from bintangur (Calophyllum inophyllum L.) leaf ethanol extract and its antibacterial activity Liska, Liska; Amanah, Hairil; Novianti, Shindi; Mahardika, Robby Gus
Asian Journal of Health and Applied Sciences Vol. 1 No. 2 (2022): Asian Journal of Health and Applied Sciences (AJHAS)
Publisher : Lighthouse Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53402/ajhas.v1i2.29

One of the most widely distributed plant species in Bangka Belitung is Bintangur (Calophyllum inophyllum L.) which is a genus of the Clusiaceae family. Bintagur leaf has the potential as a mask against acne-causing bacteria because it has high bioactivity such as antioxidants and antibacterials. Bitangur leaf extract masks were made by mixing the raw materials in the form of PVA 10 g; HPMC 1 g; glycerin 6 g; TEA 0.5 g; methylparaben 0.1 g; propylparaben 0.025 g; 30 ml distilled water and ethanol extract of Bintangur leaf formulation 0% 0 g; formulation 1% 0.5 g; 2% formulation 1 g and 3% formulation 1.5 g. Bintangur leaf ethanol extract mask in formulations F3 and F2 was the highest concentration producing an inhibition zone to inhibit the growth of Staphylococcus aureus and Propionibacterium acnes bacteria which were in the medium category and for formulations F1 and F3 the highest concentrations were to inhibit the growth of epidermal Staphylococcus bacteria which were categorized as The ethanol extract of Bintangur leaf whose antioxidant activity was measured obtained an IC50 value of 9.87 g/mL which was included in the very strong category. The mask of Bintangur leaf extract in the form of the peel-off gel has the potential to be used and marketed.

PENDAMPINGAN PEMBUATAN MASKER PEEL OFF PUCUK KAYU LUBANG Timonius flavescens (Jacq.) Baker MENJADI PRODUK UNGGULAN DESA AIK ABIK Robby Gus Mahardika; Occa Roanisca; Henri Henri; Selvy Aprilia
Martabe : Jurnal Pengabdian Kepada Masyarakat Vol 7, No 1 (2024): MARTABE : JURNAL PENGABDIAN KEPADA MASYARAKAT
Publisher : Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/jpm.v7i1.161-165

Dusun Aik Abik memiliki potensi tumbuhan obat yang sangat tinggi. Masyarakat masih sering memanfaatkan tumbuhan obat sebagai terapi pengobatan. Tumbuhan kayu lubang (Timonius flavescens (Jacq.) Baker) sering digunakan masyarakat setempat untuk perawatan wajah dan mengobati jerawat. Tumbuhan tersebut dapat dikembangkan menjadi produk turunan masker peel off yang dapat dijadikan sebagai produk unggulan desa. Oleh karena itu, melalui kegiatan pengabdian kepada masyarakat ini tim pengabdi mentransfer inovasi pengolahan pucuk kayu lubang sebagai masker peel off untuk mendukung pemanfatan tumbuhan lokal menjadi produk yang bernilai ekonomi tinggi. Metode yang digunakan pada kegiatan ini berupa sosialisasi dan pendampingan secara langsung kepada mitra sasaran perangkat lembaga adat Dusun Aik Abik dan masyarakat. Hasil kegiatan pengabdian kepada masyarakat ini adalah mitra sasaran memahami cara formulasi masker peel off berbahan pucuk kayu lubang dan menerima desain kemasan yang telah dicetak oleh tim pengabdi. Komitmen mitra sasaran akan melanjutkan pengembangan masker peel off menjadi produk unggulan Dusun Aik Abik.

Co-Authors Adisyahputra Adisyahputra Adisyahputra Adisyahputra Adisyahputra Adisyahputra Adisyahputra Adisyahputra, Adisyahputra Afrilia, Mega Ajeng Triane Syawila Amanah, Hairil Amelia, Ririn Ana Mardliyah Anggraeni Anggraeni Aprilia, Selvy Ary Samsiar Ary Samsiar Benget Harmoko Manik Boy Dian Anugra Sandy Boy Dian Anugra Sandy Delvia Safitri Dewi Septia Ningsih Dianti Aviliani Eva Utami Fadiyah, Inas Fajar Indah Puspita Sari Fajar Indah Puspita Sari Fajar Indah Puspita Sari Fitri Afriani Fusfita Istiqomah Genta Febri Kusuma Gita Afriza Guskarnali, Guskarnali Henri Henri Herman Aldila Ila Rosilawati Janiar Pitulima Kasro Daniati khairul fajri, khairul Khoirotul Ummah Khoirotul Ummah Lestari, Iin Lidya, Lidya Liska Liska, Liska Mariam Ulfah Maya Yusnita Megiyo Megiyo Nazrun Nazrun Nina Kadaritna Nosa Mayasani Novianti, Shindi Nur Hidayatiandri Nurhadini Nurhadini Putri, Faizah Alivia Rani Rani RANI RANI, RANI Ristika Oktavia Asriza Roanisca, Occa Sari, Ratih Puspita Selvy Aprilia Sembiring, Rinawati Shakila, Shania Shania Sakhila Sito Enggiwanto Sito Enggiwanto Stefan Marco Rumengan Surtina, Surtina Susanti Susanti Syarmila, Syarmila Utami, Sri Risky Verry Andre Fabiani Widia, Widia Widodo Budi Kurniawan Yopan Pratama Yulia Yulia Zulita, Zulita

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