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BERKALA SAINSTEK
Published by Universitas Jember
ISSN : -     EISSN : -     DOI : -
Core Subject : Science, Education, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Mathematics Physics
Berkala SAINSTEK (BST) merupakan jurnal ilmiah yang memuat artikel hasil penelitian di bidang sains dan teknologi. Secara khusus BST diperuntukan bagi penulis internal mahasiswa Universitas Jember bidang fisika, matematika, biologi, kimia, teknik sipil, teknik mesin, teknik elektro dan sistem informasi. Namun BST juga menerima artikel dari penulis eksternal sepanjang memenuhi kriteria dan dalam lingkup bidang sains dan teknologi.
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Articles 7 Documents
 1 
Search results for , issue "Vol 12 No 1 (2024)" : 7 Documents clear
The Diversity of Amphibian (Order Anura) in Bandealit Resort, Meru Betiri National Park Siddiq, Arif Mohammad; Pradana, Yuan Zulia; Setiawan, Rendy; Sulistiyowati, Hari
BERKALA SAINSTEK Vol 12 No 1 (2024)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v12i1.42624

Abstract

Meru Betiri National Park (MBNP) is a conservation area located in East Java that has a diversity of flora and fauna. However, the information about entirety diversity in this area is still uncleared, due to limited scientific research, one of which is amphibians. So, the aim of this study is to explore the diversity of amphibian species (order Anura) in Bandealit Resort, MBNP. Data collection was carried out on January 6-8, 2023 in four representative habitat types i.e., terrestrial, arboreal, semi-aquatic, and aquatic. The data collection method was using Visual Encounter Surveys (VES) on each observation line with a length of 300m. The ecological data collected included the species names of amphibians (Anura) and the number of individuals of each species. Furthermore, data analysis was using species composition and species diversity using the Shannon-Wiener index (H'). Based on the results, six species of Anura were found (Fejervarya cancrivora, F. limnocharis, Leptobrachium hasseltii, Kaloula baleata, Hylarana chalconota, and Polypedates leucomystax) belonging to five families (Dicroglossidae, Megophryidae, Microhylidae, Ranidae and Rhacophoridae). Species P. leucomystax was found with the highest number of individuals (eight individuals) and occupied arboreal, terrestrial, and semi-aquatic habitat types. Based on the Shannon-Wiener index, the species diversity value of the order Anura amphibians was obtained in the moderate category (H'=1.47). This shows that the Bandealit Resort in MBNP provides an important habitat for several species of the order Anura amphibians. Furthermore, the results of this study also provide updated data regarding the existence of amphibian species of the order Anura in MBNP, especially Bandealit Resort.
Virtual Screening of Inhibitor Compounds for HL-60 Cell Line Using QSAR and Molecular Docking Approaches Putri Handayani, Maulina Surindri; Sudarko, Sudarko; Nugraha, Ari Satia
BERKALA SAINSTEK Vol 12 No 1 (2024)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v12i1.42341

Abstract

Leukaemia is a type of heterogeneous malignancy disease in which the number of immature white blood cells in the bone marrow is increased or poorly differentiated. Inhibitors of HL-60 cell line are important drugs in the treatment of leukaemia. This study aims to identify potential inhibitors for HL-60 leukaemia cells using virtual screening with QSAR and molecular docking approaches. The best QSAR model obtained was the model with R2 testing value of 0.72. The best model was applied to the Enamine database, obtained 3,841,278 compounds with pIC50 above 9 were clustered to end up with 50 inhibitor candidate compounds. The compounds were further studied through molecular docking against CDK- 2 and BCL-2 target proteins with binding free energy analysis. Screened compounds have high inhibitory potential against CDK-2 and BCL-2 target proteins in HL-60 cells which can be proposed as potential inhibitors of HL-60 cells. These compounds can be further tested for the development of more effective antileukaemia drugs.
Snack Production Planning Strategy using Goal Programming Method Umama, Nadya; Pradjaningsih, Agustina; Riski, Abduh
BERKALA SAINSTEK Vol 12 No 1 (2024)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v12i1.45345

Abstract

UD Surya Snack Banyuwangi is one of the Banyuwangi snack shops that produces several kinds of snacks such as dry sponge cake, Bagiak, sato, sale, and others. Production at the factory is closely related to meeting market demand. Therefore, factories must carry out production planning so that they can produce products in sufficient quantities to meet market demand. Production planning involves making decisions regarding the number of products produced, resource allocation, and setting up the production process to achieve effectiveness and efficiency in the process. The article based on this research aims to obtain optimization values in production planning to meet market demand using the Goal Programming method. Goal Programming is a method that aims to minimize deviations from all goals by adjusting decision variables to achieve conformity with the specified goals. This research was carried out by direct observation at UD Surya Snack which was in direct contact with the factory owner. The data and information used in this research include production volume, production value, profits, production costs, and labor costs in one month. The data was then modeled using the Goal Programming method to determine decision variables, constraint functions, and objective functions and solved with the help of Excel Solver. The results obtained show that the application of Goal Programming in UD. Surya Snack production planning shows optimal values. The total profit earned was IDR 17.078.000 in one month after deducting production costs and labor costs. The deviation values of all constraints that must be minimized in the objective function have been met.
Cover BST Volume 12 No 1 (2024) BERKALA SAINSTEK, Journal
BERKALA SAINSTEK Vol 12 No 1 (2024)
Publisher : Universitas Jember

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

Abstract

Recrystallization of Iron Materials Under The Influence of High-Temperature Heat Treatment: A Molecular Dynamics Study Janga Hauwali, Nikodemus Umbu; Setyawan Bani, Marsi Devid; Supu, Amiruddin; Arkundato, Artoto
BERKALA SAINSTEK Vol 12 No 1 (2024)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v12i1.43756

Abstract

Simulations have been carried out to study the recrystallization of iron materials after heat treatment. The heat treatment carried out consists of heating the iron from room tempera-ture to critical temperature with different heating temperatures and cooling to room tem-perature with different cooling times. This study was carried out to obtain information on the occurrence of material recrystallization after the heat treatment process was carried out. This simulation approach was carried out using molecular dynamics methods and utilizing LAMMPS software. The heat treatment process begins by heating the iron from room temperature (300 K) until it reaches a critical temperature, even past the critical temperature value. Then a cooling process is carried out to observe the material recrystallization process. Through these two stages of heat treatment, analysis is carried out to observe the material structure at the end of the simulation. Based on the simulations that have been carried out, the results show that the ma-terial’s recrystallization is more influenced by the cooling time than the initial cooling tem-perature. More than 60% of the BCC structures formed at the end of the simulation for all initial cooling temperatures, but for very short cooling times 16% of the BCC.
Bioethanol Production by Fermentation of Rice Husk and Golden Banana Peel Delignified Using EM4 Mulyani, Afnan Septi; Hidayah, Amaliyah Nurul; Paramita, Denok Risky Ayu; Azizah, Siti Nur
BERKALA SAINSTEK Vol 12 No 1 (2024)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v12i1.43054

Abstract

The increasing number of vehicles can increase the need for fossil fuels and polution so that a safe alternative is needed. one of the environmentally friendly alternatives is bioethanol. Banana peels and rice husks contain carbohydrates that are good enough to be utilized as a microbial fermentation substrate to be converted into bioethanol. The purpose of this study is to determine the optimal level of bioethanol produced in rice husk and golden banana peel that has been delignified with EM4. The research method used is experimental research with research stages starting from the manufacture of rice husk powder and golden banana peel, delignification using EM4, measurement of lignin content, making rice husk slurry and golden banana peel delignification results, fermentation using baker's yeast with a concentration of 1%, measurement of bioethanol content, data collection and data processing using One Way Anova to determine differences in each sample. The results obtained bioethanol levels increased until the last day of fermentation, which is 9 days with levels of 46.08%. It can be concluded that the use of golden banana peel and rice husk that has been delignified with EM4 is able to produce the most optimal bioethanol.
Effect of Duck Manure (Anas domesticus) and Compost on the Growth of Kangkong (Ipomoea reptans Poir var. Bangkok LP-1) on Aquaponic Systems Meliyani, Auliya Tri; Putra, Ramadhani Eka; Rahman, Heri
BERKALA SAINSTEK Vol 12 No 1 (2024)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v12i1.34839

Abstract

Kangkung (Ipomoea reptans) menjadi salah satu sayuran yang paling banyak di konsumsi dengan tingkat konsumsi, pada tahun 2020, sebesar 3,784 kg/kapita/tahun. Akan tetapi, ketersediaan kangkung masih belum memenuhi kebutuhan masyarakat dengan data ketersediaan per kapita yaitu sebesar 1,03 kg/kapita/tahun. Oleh karena itu, perlu dilakukan peningkatan produksi kangkung terutama pada daerah urban, salah satunya melalui sistem akuaponik. Tujuan dari penelitian ini adalah untuk mendapatkan informasi mengenai komposisi dan dosis pupuk kandang bebek serta kompos terhadap pertumbuhan tanaman kangkung pada sistem akuaponik. Penelitian menggunakan rancangan eksperimental dengan faktor perbedaan yaitu pemberian pupuk kandang bebek dan kompos dengan komposisi yang berbeda. Terdapat lima perlakuan dengan masing-masing talang diulangi sebanyak 26 tanaman. Masing-masing perlakuan yaitu kontrol (0% pupuk/kompos), pupuk kandang bebek 750 g (50%), pupuk kandang bebek 1,500 g (100%), pupuk kompos 750 g (50%), pupuk kompos 1,500 g (100%). Hasil penelitian menunjukkan bahwa perlakuan pemberian pupuk kompos 100% (1,500 g) menghasilkan pertumbuhan dengan hasil paling optimal terhadap jumlah daun, panjang akar, biomassa basah, dan biomassa kering tanaman kangkung.

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