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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 9 Documents
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Search results for , issue "Vol. 12 No. 4 (2024)" : 9 Documents clear
Zodia (Evodia suaveolens) Leaves as Natural Mosquito Repellent Material: Effectiveness Test of Distillation Methods Sumalyani, Aisyah; Ma'mun, Sholeh; Riyanto, Riyanto
BERKALA SAINSTEK Vol. 12 No. 4 (2024)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v12i4.53351

Abstract

Indonesia has around 40 types of plants with essential oil content from a total of around 150 types of essential oils traded in the international market. Essential oils are produced from various parts of aromatic plants such as fruits, seeds, leaves, flowers, roots, stems, bark, and even the entire tree. One of the plants that contains and has the potential to produce essential oils is the zodia (Evodia suaveolens), especially the leaves. Evodone is one of the active compounds contained in the essential oil of zodia leaves which has the ability as a mosquito repellent. This study aims to determine the effectiveness of hydrodistillation, steam-hydrodistillation, and steam distillation in terms of yield, physical properties, and active insecticide compound content. A total of 1000 g of fresh zodia leaves were put into a distillation kettle either boiled, steamed, or in direct contact with steam for three hours at 100 °C and atmospheric pressure. The remaining water content in the essential oil from the distillate was then absorbed with Na2SO4. Furthermore, the water-free essential oil was tested for its physical properties consisting of density, optical rotation, refractive index, and color tests, and then its chemical composition was analyzed using GC-MS. The results showed that the yield for hydrodistillation, steam-hydrodistillation, and steam distillation were 0.37%; 0.43%; and 0.31%, respectively. From the optical rotation test, the essential oil from steam distillation had the lowest value indicating the highest level of purity compared to the other two methods. This is in accordance with the density and refractive index data, where the essential oil from steam distillation had the highest value, where the color was darker. Meanwhile, based on the results of GC-MS analysis, the highest active insecticide compound in the form of evodone was obtained from steam-hydrodistillation (14.25%), followed by hydrodistillation (7.62%), and steam distillation (4.81%).
Fault Identification Based on Tulungagung Magnetic Anomaly Map Kurniawati, Nur Laily; Muhardi, Muhardi; Perdhana, Radhitya
BERKALA SAINSTEK Vol. 12 No. 4 (2024)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v12i4.46883

Abstract

Tulungagung and Trenggalek are two regencies located south of Java Island with quite complex geological conditions because they are located in the Southern Mountains area. This study aims to identify the presence of faults based on the magnetic anomaly value of the Tulungagung sheet. The presence of faults at the research site were determined based on three lines on the regional magnetic anomaly using First Horizontal Derivative (FHD) and Second Vertical Derivative (SVD) derivative analyses. The results show that the regional magnetic anomaly is -210.7 nT to 113.2 nT. Line A-A' identified two fault locations at a distance of 15 km and 27 km from the line's starting point. Line B-B' identified three fault locations at a distance of 4 km, 27 km, and 45 km from the line's starting point. Line C-C' identified three fault locations at 10 km, 22 km, and 42 km from the line's starting point. The interpretation results also obtained subsurface lithology in the Alluvium Formation, Arjosari-Mandalika Formation, Wungkal Limestone Formation, and Malihan Rock Formation.
Utilization of Windu Shrimp Shell Waste from Malaka-NTT for Chitosan Synthesis: Characterization Study and Application Potential Kedang, Yohana Ivana; Oktavianawati, Ika; Tea, Marselina Theresia Djue
BERKALA SAINSTEK Vol. 12 No. 4 (2024)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v12i4.52637

Abstract

Chitosan is a non-toxic and biodegradable polymer compound. Chitosan is widely applied in various industrial fields. This research uses shrimp shell waste from the Malaka-NTT as a chitin and chitosan production source. Chitosan synthesis consists of three steps, namely deproteination, demineralization and deacetylation. Chitosan characterization includes determining the degree of deacetylation (DD), determining functional groups using Fourier Transform Infra-Red (FTIR), and measuring crystallinity using X-ray diffraction (XRD). The DD results obtained were 83.7%. The FTIR spectra results of the chitosan samples in this study showed a typical peak at absorption of 1648 cm-1 indicating the vibration of the C=O group in NHCOCH3 (amide) I and absorption of 1589 cm-1 indicating the vibration of the N-H bending group (amide II). The results of the XRD diffractograms on the chitosan sample show an orthorhombic crystal structure with two typical peaks, namely at angles 2θ = 10.12° and 2θ = 19.87°. The DD results obtained in this study indicate that the chitosan produced has a fairly high amine group content, so chitosan as a biomaterial has the potential to be applied in various pharmaceutical and biomedical fields because it has environmentally friendly, biocompatible, and biodegradable properties. Therefore, based on the results of the DD calculation and the characterization of the FTIR and XRD instruments in this study, it shows that the synthesis of chitosan from the utilization of tiger shrimp shell waste from Malaka Regency-NTT has been successfully carried out.
The Study of Fishing Port Networks to Support Buffer Areas in IKN Putri, Destyariani Liana; Wirawan, Muhammad Khaisar; Huda, Abiyani Chairul; Aldovani, Ardian Audi; Natasya, Della
BERKALA SAINSTEK Vol. 12 No. 4 (2024)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v12i4.45876

Abstract

East Kalimantan Province is a region in Indonesia where the mining and quarrying industry is still the main sector that influences the regional economy and Indonesia as a whole. However, local governments hast to make efforts to encourage other economic sectors to avoid a decline in economic growth which is influenced by fluctuations in world market prices. For example, the agricultural sector, including fisheries, is the most important potential commodity in East Kalimantan. The development of fishing ports in the coastal areas of East Kalimantan is very important as a center for local economic activities and also as a place to maintain the sustainability of fish resources. Apart from that, with the progress of the development of the New Capital City of Indonesia (IKN) in the Balikpapan and North Penajam Paser areas, it is important to review the function of the port as supporting water transportation connectivity in the IKN.
Additional Records of Macroscopic Fungi at IPB University Campus Forest and Their Potential Use Karepesina, Sedek; Putri, Kurniawati Purwaka; Rumondang, Amandita Lintang; Putra, Ivan Permana
BERKALA SAINSTEK Vol. 12 No. 4 (2024)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v12i4.47438

Abstract

Fungi are heterotrophic organisms and become decomposers in various types of environments. In Indonesia, fungi have a high level of diversity, but not all of them have been properly identified. The type of ecosystem that can grow mushrooms includes forests, due to high levels of humidity so fungi can easily adapt. The IPB Campus Forest is an area planted with various types of trees with the aim of being a conservation and protection area for flora and fauna. IPB forests have various types of higher plants, ferns, undergrowth, and various types of fungi (microscopic and macroscopic). This research aimed to increase information on the diversity of mushroom types in the IPB Campus Forest to serve as a basis for their use in the future. Fungal exploration was carried out using the random roaming method. Fruiting bodies were identified based on macroscopic and microscopic characters, then isolated on PDA media. This research confirmed the occurrence of 3 types of fungi, namely Lentinus arcularius, Pycnoporus sanguineus, and Marasmius sp. All three are members of the phylum Basidiomycota. L. arcularius is found on wooden twigs, has a brown pileus with white edges, a smooth surface and serrated edges, a concave pileus, transparent and oval-shaped spores, hyphae aerial, colony white to cream from upper view. P. sanguineus grows on a substrate of dead tree branches that have fallen to the ground, the basidiomata are red mixed with orange and almost semi-circular in shape, the edge of the cap is rounded and flat with a yellowish color, the pseudostipe is directly attached to the substrate, the hymenophore is pore-shaped with a red and orange color, overlapping and pigmented hyphae, colony radial, hyphae aerial, colony white from upper view. Marasmius sp. grows gregariously in the litter, the pileus is shaped like an inverted bowl and is orange in color, the edges of the cap are flat with small-serrated cap margins, the hymenophore is in the form of lamellae with an adnexed attachment, the hyphae are club-shaped with the sterigma shaped like a root, the colonies are cream, the surface is smooth. All fungi from this study have the potential to be used as medicinal ingredients and sources of other secondary metabolites. The results of this research add to data regarding the diversity of fungi in Indonesia and can be used as literature for subsequent research. Further works should consider not only the diversity but also the bioprospection potency of wild mushroom.
Lauryl Hydroxysultaine as a Low Dose Foam Enhancing Booster Putri, Avicenna Mustika; Ma'mun, Sholeh; Zulkania, Ariany
BERKALA SAINSTEK Vol. 12 No. 4 (2024)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v12i4.53374

Abstract

The growth of Indonesia's cosmetics industry reached 21.9%, with 913 companies in 2022 and 1,010 companies by mid-2023. Among the total products from local cosmetic companies, the largest market segment is personal care. Shampoo and bodywash are the two main categories of personal care cleansing products. Foam is an important indicator of product quality; however, technically, foam does not always correlate with the cleaning strength of a product. Nevertheless, consumers expect shampoos and body washes to lather easily and produce abundant foam. The foaming ability of a product is influenced by several factors, one of which is the addition of foam boosters. Cocamidopropyl betaine (CAPB) is the most used foam booster and is produced on a large scale. Another foam booster is lauryl hydroxysultaine (LHS) which has better foam-producing ability than CAPB. This study aims to determine the right formulation of LHS addition in shampoo and bodywash thus it meets the specified requirements. Shampoo and bodywash were prepared with several formulations, the samples were then tested for their viscosity, foam quality, and irritation potential. The results showed that LHS performed better than CAPB for the three parameters above. It was obtained that a dose of 2% LHS gave a better effect than 3% CAPB. It is, therefore, quite profitable from an economic and environmental perspective.
The Impact of Halal Supply Chain Implementation on The Purchase Intention of Cosmetics Among Generation Z Customers Dharmapatni, Made Ranjani; Tansy, Argya Fauziah; Barges, Zetira; Nursabila, Nursabila; Yordan, Vainzela Dwi Amanda; Sukarno, Iwan; Vikaliana, Resista
BERKALA SAINSTEK Vol. 12 No. 4 (2024)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v12i4.53074

Abstract

The development of the cosmetics industry in Indonesia has shown growth in line with changes in lifestyle, particularly among the younger generation. As a generation that has grown up with broad access to technology and information, Gen Z possesses a heightened awareness of the composition and production processes of the cosmetic products they use, including the halal label, which is one of the main preferences for Muslim consumers. The implementation of a halal supply chain is an effort to ensure the halal integrity of the products used. Unfortunately, just a few studies have explored the factors driving Gen Z's purchase interest in cosmetic products that adopt a halal supply chain.This study aims to explore and gain deeper insights into these factors so that various stakeholders involved can determine appropriate strategies to meet these needs. Various variables and indicators were employed in this research using the Structural Equation Model Partial Least Square (SEM-PLS) model to identify the factors that most influence Gen Z's purchase interest in cosmetic products adopting a halal supply chain.The results of the study indicate that, after the variables of packaging and halal labeling, the product storage variable becomes the most influential factor in Gen Z's purchase interest. Therefore, greater attention is needed to ensure the implementation and quality of this variable within the halal cosmetics supply chain.
Phytoplankton and Water Environment Conditions in the Noe Meto River Priyambodo, Hernur Yoga; Santiari, Made
BERKALA SAINSTEK Vol. 12 No. 4 (2024)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v12i4.53367

Abstract

This research aims to determine the structure of the phytoplankton community and the values of chemical and physical water parameters in the Noe Meto river. This research was carried out using purposive sampling by paying attention to sampling stations in places used by local people to wash clothes or motorbikes. A total of 3 research stations had water samples taken to analyze the type of phytoplankton in the laboratory. Meanwhile, environmental factors such as pH and temperature are carried out in situ. The research results showed that the existing phytoplankton community had an abundance value of 6-328 ind/L, a diversity index value of between 1.698-2.200, a uniformity index value of 0.708-0885 and a dominance index value of between 0.128-0.242. All of the phytoplankton species found were from the Bacillariophyceae class. The water temperature values of the Noe Meto River from the three stations range from 29.67oC-31oC and the pH value of the water is 7 or neutral. Based on existing data, it shows that the phytoplankton in the Noe Meto river is experiencing environmental pressure in the moderate category.
Comparative Analysis of Earthquake Resistant Building Structure Design Planning Using Artificial Intellegence and SAP2000 Methods Nofiana, Tiara; Asmuni, Asmuni; Cahyadi, Cahyadi; Suzanti, Wiwien; Islamawan, Arip
BERKALA SAINSTEK Vol. 12 No. 4 (2024)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v12i4.53521

Abstract

Earthquakes are natural phenomena that often occur in Indonesia, even Indonesia is one of the countries with the highest earthquake frequency in the world, there have been several major earthquakes that have caused infrastructure damage and claimed many victims. This study aims to determine the design of earthquake-resistant building structures, the results of the application of Artificial Intelligence (AI) in design of earthquake-resistant building structures, and its advantages and disadvantages. The core principle of earthquake-resistant buildings is high ductility, allowing them to absorb earthquake energy and avoid collapse despite deformation. This research employs a comparative method, evaluating AI against conventional methods like SAP2000 in terms of accuracy, efficiency, and practicality in designing earthquake-resistant structures. The analysis reveals minimal differences, with a 0.016% variance in calculations between AI and SAP2000, which has a negligible impact on factors like mass participation ratio, base shear force, and inter-floor deviation. However, AI significantly affects the Natural Period of the Building. AI also offers faster calculations and easier input specifications compared to SAP2000. Despite its advantages, AI has limitations in 3D modeling due to the absence of a user interface, making the modeling process more challenging.

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