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All Journal CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) CHEMISTRY PROGRESS JURNAL KIMIA SAINS DAN APLIKASI Jurnal Pengabdian Kepada Masyarakat Universitas Bangka Belitung Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir Jurnal Kimia Mulawarman IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Al-Kimia SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Chemistry Indonesian Journal of Chemical Research Martabe : Jurnal Pengabdian Kepada Masyarakat AGROMIX ALKIMIA : Jurnal Ilmu Kimia dan Terapan Stannum : Jurnal Sains dan Terapan Kimia Journal of Instructional and Development Researches Jurnal Pijar MIPA Asian Journal of Health and Applied Sciences Jurnal Riset Fisika Indonesia Dharma Pengabdian Perguruan Tinggi (DEPATI) Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir
Nurhadini Nurhadini
Jurusan Kimia, Fakultas Teknik, Universitas Bangka Belitung
Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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Pemanfaatan limbah tempurung kelapa untuk pembuatan asap cair menggunakan metode pirolisis Evahelda Evahelda; Rufti Puji Astuti; Sitti Nurul Aini; Nurhadini

Publisher : Fakultas Pertanian Universitas Yudharta Pasuruan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35891/agx.v14i2.3123

Abstract

Introduction: In the Bangka Belitung Islands Province, the use of coconuts is currently limited to the fruit only. Whether consumed fresh (young coconut water and young fruit flesh), or processed as food (grated coconut and coconut milk), the coconut shell and husk have not been utilized optimally. Efforts to optimize coconut shells can be used as raw material for making liquid smoke. The aim of this research is to describe the process of making liquid smoke from coconut shell waste by utilizing the resulting shell waste and classifying liquid smoke based on its color. Methods: The process of making liquid smoke in this research is by utilizing solid coconut shell waste from coconut milk presses around campus, then processing it into liquid smoke, using a pyrolysis equipment (Grant from the Ministry of Research, Technology and Higher Education in 2009) at a temperature of 300°C for 8 hours . Results: The results of the research show that the liquid smoke produced is blackish brown in color with an L value, smaller than grades 2 and 1, while the a and b values are greater than grades 2 and 1, so it can be classified into grade 3. Conclusion: Liquid smoke Grade 3 cannot be used for food preservatives, because it still contains a lot of tar which is carcinogenic. The use of liquid smoke can only be used as a coagulant and odor remover in rubber processing because liquid smoke has anti-fungal and anti-bacterial properties, pesticides, wood and bamboo preservatives to make it resistant to termites.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (555.555 KB) | DOI: 10.53402/ajhas.v1i1.5

Abstract

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.
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.
Adsorpsi Hg(II) Menggunakan Sargassum crassifolium dengan Adanya Pb(II), Cu(II) dan Fe(II) Nurhadini, Nurhadini; Silalahi, Imelda H.
Indonesian Journal of Chemical Research Vol 5 No 1 (2017): Edisi Bulan Juli (Edition For July)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2017.5-nur

Abstract

Amalgamation use mercury in mining process especially small-scale gold mining and it has been impacted on mercury contamination in environment. Mercury is one of heavy metal that toxic and can accumulate in water, soil and organism. Adsorption method is one of alternative option that effective to remove heavy metal. This method depends on adsorbent type, pH, adsorbent composition with metal or presence of several metal ions. Beside mercury, wastewater of mining gold have another metal ions such as Pb(II), Cu(II) dan Fe(II) can be found by human activity or naturally present. This research aim is to study effect of Pb(II), Cu(II), and Fe(II) in Hg(II) adsorption by using Sargassum crassofolium adsorbent. Research stages are adsorbent activation and mercury adsorption on binary and ternary system respectively in equimass amount of metals ion and equimolar amounts of metals. Based on adsorption analysis is known that Pb(II) and Cu(II) is Hg(II) competitor while Fe (II) is not Hg(II) competitor in adsoption by using Sargassum crassifolium. On binary system in equimass amount of metals ion and equimolar amounts of metals that the largest decreasing effect of Hg(II) adsorption in system contain Cu(II).
Separation of Thorium (Th) from Monazite Sand of Bangka Island using Primene JMT Solvent Extraction Method Claudia, Dita; Fabiani, Verry Andre; Nurhadini, Nurhadini; Prassanti, Riesna
EKSPLORIUM Vol 44, No 2 (2023): November 2023
Publisher : Badan Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/eksplorium.2023.6480

Abstract

Thorium is an essential element as an alternative nuclear fuel to replace uranium. Thorium is found in the mineral monazite, which is a by-product of the alluvial tin mining process. Many methods have been used to extract and separate thorium from uranium and REEs from monazite, one of which is the organic solvent extraction method. In this research, the primene JMT, which is an extractant of primary amine compounds, was used in the method. The studied parameters are feed pH, JMT primene concentration, and stirring speed. The results show that the optimum conditions for Th extraction in monazite using solvent extraction method primene JMT were obtained at pH 0.5, extractant concentration of 2%, and stirring speed of 300 rpm with Th recovery of 94.05% while U and REE were not extracted.
Synthesis and Characterization of Zirconium Oxychloride from Bangka and Belitung Zircon Sand Nurhadini, Nurhadini; Fabiani, Verry Andre; Ndruru, Sun Theo Constan Lotebulo; Kurniawan, Widodo Budi
Jurnal Kimia Sains dan Aplikasi Vol 28, No 7 (2025): Volume 28 Issue 7 Year 2025
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.28.7.362-367

Abstract

Although zircon sand, a byproduct of tin mining in Bangka and Belitung, is abundant and rich in zirconium content, it remains underutilized despite its potential for conversion into value-added products. This study aims to explore the feasibility of using Bangka and Belitung zircon sand as raw materials for the synthesis and characterization of zirconium oxychloride octahydrate (ZrOCl2·8H2O), and to evaluate its properties relative to a commercial reference. A hydrometallurgical process involving alkaline fusion and acid leaching was employed to convert zirconium silicate (ZrSiO4) into ZrOCl2·8H2O. Comprehensive characterization was conducted using X-ray fluorescence, X-ray diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy, and particle size analysis. The results revealed that Bangka zircon sand contains a higher zirconium content (79.12%) than Belitung sand (76.97%). Both sources exhibited lower zirconium purity and higher chlorine content compared to a reference. Despite these limitations, the total Zr and Cl content reached 88.12% for the Bangka sample and 86.08% for the Belitung sample, indicating promising potential. Both products shared similar structural and morphological features in different sizes. Belitung-derived ZrOCl2·8H2O exhibited a higher ZrOCl2·8H2O phase, more defined morphology, and smaller size, suggesting it has better properties as a precursor in zirconium-based applications. This study supports the valorization of mining byproducts and highlights the potential of local zircon sand as a raw material for zirconium-based applications.
Penerapan Media Pohon Kata Untuk Meningkatkan Kemampuan Menyusun Kalimat Pada Siswa Sekolah Dasar Nurhadini, Nurhadini; Khairudin, Khairudin; Fuaddudin, Fuaddudin
Journal of Instructional and Development Researches Vol. 4 No. 4 (2024): August
Publisher : Yayasan Indonesia Emerging Literacy Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53621/jider.v4i4.356

Abstract

Permasalahan yang ada di kelas VI SD Muhammadiyah Kota Bima antara lain siswa yang kurang antusias dalam mengikuti pembelajaran, lingkungan kelas yang kaku, dan siswa yang tidak berkonsentrasi saat mengikuti kegiatan pembelajaran, hal ini disebabkan media yang diterapkan oleh guru tidak menarik dan menyenangkan, sehingga sangat berdampak pada hasil belajar siswa kelas VI terkait dengan menyusun kalimat. Tujuan penelitian ini adalah untuk mendeskripsikan hasil belajar siswa Kelas VI SD Muhammadiyah Kota Bima menggunakan media pohon kata, serta untuk meningkatkan keterampilan menyusun kalimat pada pembelajaran Bahasa Indonesia. Penelitian ini menggunakan penelitian Tindakan Kelas (PTK) dan dilakukan selama dua siklus dengan tahapan seperti perencanaan, pelaksanaan, pengamatan, dan refleksi dengan jumlah sampel 27 siswa. Hasil temuan menunjukan pada kegiatan pra siklus yang tuntas sebanyak 7 siswa sebanyak 26 % dan yang tidak tuntas 20 Siswa sebanyak 74 %, Peningkatan persentase pada siklus I sebanyak 63 %, sedangkan pada siklus II sebanyak 85 % dengan rincian pada siklus I 17 siswa yang tuntas dan tidak tuntas 10 siswa, untuk siklus II 23 siswa yang tuntas dan tidak tuntas 4 siswa. Dari hasil penelitian tersebut telah menunjukan angkatan peningkatan pada tiap siklus dan penerapan media pohon kata telah meningkatkan kemampuan menyusun kalimat pada siswa.
Phytochemical Screening of Acetone Extract of Rambai Leaves (Baccaurea motleyana) and Its Bioactivity as an Antibacterial Against Escherichia coli and Staphylococcus aureus Fransiska, Destalia; Roanisca, Occa; Nurhadini, Nurhadini
Jurnal Pijar Mipa Vol. 19 No. 4 (2024): July 2024
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v19i4.6840

Abstract

Bacteria are one of the organisms that may cause disease in the human body. Some bacteria which often infect the human body are Escherichia coli and Staphylococcus aureus. Both bacteria are pathogenic and possibly lead to various diseases such as diarrhea, urinary tract infections, and lung infections that have the potential to result in death. Treatment of infections caused by these bacteria can be done by giving antibiotics as therapy or a quick cure against infection. The use of antibiotics has side effects that result in resistance. Therefore, it is necessary to screen bioactive compounds with bioactivity as better antibacterial agents so that they can be developed into drugs that can cure diseases caused by bacteria. It is urgent to utilize natural antibacterials from plants to treat bacterial infections. This research aims to obtain the compound content, the total phenolic, and antibacterial activity of acetone extract of rambai leaves, so this research focused on rambai leaf acetone extract phytochemical content, total phenolic content, and antibacterial activity examination. Then, Phytochemical testing of rambai leaf acetone extract (Baccaurea motleyana) shows rambai leaves contain alkaloid compounds, tannins, flavonoids, saponins, steroids, and terpenoids that have the potential to be antibacterial. The examination of phenolic content was accomplished by using the Folin-Ciocalteau method. The total phenolic test results obtained were 68.63 mg EAG/g. Antibacterial testing was performed by implementing the disk diffusion method. Antibacterial testing of rambai leaf acetone extract Concentration of 20 %, 40%,60%, and 80%  showed consecutive results in inhibition zones of 3.86 mm, 6.48 mm, 6.55 mm, and 6.63 mm with weak to medium activity for E. coli bacteria. However, S. aureus  bacteria showed consecutive results in inhibition zones of 6.02 mm, 10.15 mm, 17.10 mm, and 19.46 mm with medium to intense activity. There has not been much research on rambai from Bangka Belitung, so there is an indispensable for further research regarding the total flavonoid and total alkaloid content of rambai leaves. Research may also carried out using a variety of solvents.
PENGEMBANGAN PRODUK OLAHAN HASIL LAUT MENJADI CAMILAN ANAK SEBAGAI UPAYA PENCEGAHAN STUNTING MENUJU MASYARAKAT SEHAT EKONOMI KUAT Roanisca, Occa; Nurhadini, Nurhadini; Layal, Kamalia; Robiana, Sella
Martabe : Jurnal Pengabdian Kepada Masyarakat Vol 7, No 3 (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.v7i3.775-782

Abstract

Prevalensi stunting tertinggi di Provinsi Kepulauan Bangka Belitung pada Kabupaten Bangka Barat. Desa Air Nyatoh merupakan desa dengan potensi hasil laut sangat tinggi, sehingga ketersediaan sumber protein tinggi. Permasalahan yang dihadapi masyarakat yakni kurangnya pengetahuan dan kreativitas dalam pengolahan hasil laut menjadi produk yang lebih bervariasi dan bergizi tinggi menjadi kendala dalam pemenuhan kebutuhan protein. Oleh karena itu, pada kegiatan pemberdayaan berbasis masyarakat ini dilakukan pendampingan kepada ibu-ibu PKK Desa Air Nyatoh untuk memproduksi makanan tambahan stunting berupa abon, crackers dan bakso berbahan baku sea food. Pada makanan tambahan tersebut akan ditambah temulawak dan madu yang dapat meningkatkan nafsu makan. Tujuan kegiatan ini untuk meningkatkan pengetahuan dan kemampuan mitra dalam produksi camilan berbasis hasil laut sebagai pencegah stunting dan dijadikan produk unggulan desa yang berdaya saing. Metode pelaksanaan berupa sosialisasi dan pendampingan secara langsung ke mitra sasaran. Hasil pada kegiatan ini, tim pengabdi melakukan sosialiasi dan pendampingan untuk peningkatan pengetahuan dan keterampilan mitra sasaran untuk memproduksi produk camilan yang memenuhi standar bersih. Melalui kegiatan ini mitra sasaran dibekali pengetahuan mengenai tata cara pengajuan sertifikat PIRT, tata kelola UMKM agar terjaga eksistensi dan pengembangannya, serta asupan yang tepat bagi anak stunting. Kegiatan pendampingan secara langsung formulasi produk abon, crackers dan bakso dengan kombinasi temulawak dan madu telah dilakukan oleh tim pengabdi dan mitra sasaran.
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 Adi Syahputra Adisyahputra, Adisyahputra Amelia Narulita Anggraeni Anggraeni Ayu Ratna Sari Azizah, Qothrunnada Nur Claudia, Dita Devi Valeriani Dinda Liyana Eka Sari Wijianti Ependi, Eresti Eva Helda Evahelda Evahelda Fahmi Rizal Fajar Indah Puspita Sari Fardhan Arkan Fransiska, Destalia Fuaddudin, Fuaddudin Herry Marta Saputra I Made Arcana Imelda Hotmarisi Silalahi Jurian Jurian Karnelasatri, . Ken Ayu Ken Ayu Khairudin Khairudin Layal, Kamalia Lesta Lesta Lestari, Iin Megawati Ayu Putri Mimi Mawaddah Nadia Nadia Narulita, Amelia Ndruru, Sun Theo Constan Lotebulo Putri, Megawati Ayu Qothrunnada Nur Azizah Rezalia Annisa Riesna Prassanti Ristika O Asriza Ristika Oktavia Asriza Rizka Felly Roanisca, Occa Robby Gus Mahardika Robiana, Sella Rufti Puji Astuti Saparin, Saparin Sari Wulan Sari, Ratih Puspita Shania Sakhila Sitti Nurul Aini Sri Rizki Pratiwi Syarmila Syarmila Syifa Aulia Permata Sari Verry Andre Fabiani Widodo Budi Kurniawan Yunilita Hanum Zulfa Mawaddah