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BERKALA SAINSTEK
Published by Universitas Jember
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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 8 Documents
 1 
Search results for , issue "Vol 11 No 4 (2023)" : 8 Documents clear
Acute Toxicity Test of Jalembi Probiotic Beverages on Mice ddY Anindita, Reza; Sari, Afrinia Eka
BERKALA SAINSTEK Vol 11 No 4 (2023)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v11i4.34514

Abstract

An acute toxicity test is one of the pre-clinical tests needed to determine the safety of the consumption of a product before clinical trials are carried out on humans. The purpose of this study was to confirm whether or not there was a toxic effect of jalembi juice probiotic drink (red guava, lemon, melon, beetroot) on male and female mice observed for 14 days. This research design is experimental. The samples in this study were jalembi probiotic juice drinks with Lactobacillus plantarum starter and 40 male and female ddY mice. This research procedure was carried out by giving jalembi juice as a test preparation with doses of 124, 640, 3200, and 16000 mg/kg BW as much as 0.59 ml in males and females mice. Data analysis was carried out with One-Way ANOVA. This study showed that the administration of probiotic drink jalembi juice with doses of 124, 640, 3200, and 16000 mg/KgBW as much as 0.59 ml did not cause death, changes in body weight, and clinical symptoms in all test animals. It can be concluded that the probiotic drink jalembi juice is categorized as practically non-toxic (> 15 g/KgBW) or passes pre-clinical testing as a safe drink for consumption.
Cover BST Volume 11 No 4 (2023) BERKALA SAINSTEK, Jurnal
BERKALA SAINSTEK Vol 11 No 4 (2023)
Publisher : Universitas Jember

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

Abstract

Quantitative Characteristics of Crossing Bali Cows with Different Strain of Bulls in Waelata District Buru Regency Umaternate, Shahrun M.; Rajab, Rajab; Papilaya, Bercomien J.
BERKALA SAINSTEK Vol 11 No 4 (2023)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v11i4.38985

Abstract

This study aims to determine the quantitative characteristics of the crossbreed Bali cattle with several male breeds such as the Ongole, Limousine, and Simmental breeds. The method used in this research is the observation method in the form of direct observation in the field and measurement of cattle. A total of 30 adult cattle aged 1.5-2 years, consisting of 10 heads each (5 males and 5 females) crosses through Artificial Insemination (AI) of Bali cattle using frozen semen of Ongole breed bulls (POBAL), Limousin (LIMBAL) and Simmental (SIMBAL). The results showed that POBAL cattle had an average body length of 114.4-116.0 cm, chest circumference 179.4-220.0 cm, shoulder height 126.2-143.8 cm, and body weight 407.15-586.84 kg . LIMBAL cattle have an average body length ranging from 129.4-151.2 cm, chest circumference 170.4-191.8 cm, shoulder height 123.0-151.6 cm, and body weight 370.184-457.122 kg. While the average body length for SIMBAL cattle ranges from 159.8-180.0 cm, chest circumference 166.6-219.8 cm, shoulder height 125.8-154.1 cm, and body weight 356.662-584.678 kg.
Species Diversity of Grasshopper (Orthoptera: Caelifera) at the Rehabilitation Zone of the Bonangan Block, Wonoasri Resort, Meru Betiri National Park Setiawan, Rendy; Siddiq, Arif Mohammad; Ananda, Mia Bella Dwy
BERKALA SAINSTEK Vol 11 No 4 (2023)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v11i4.37379

Abstract

Grasshoppers (Caelifera) are herbivorous insects that act as first consumers in the food chain. Grasshoppers can detect the presence or absence of plants as a source of food and a place to live, as well as being an indicator of environmental recovery. This study aims to determine the diversity of grasshopper species in the rehabilitation zone of Bonangan Block, Resort Wonoasri Meru Betiri National Park. The sampling method used a structured roaming technique. The results obtained nine types of grasshoppers covering seven genera with a total of 228 individuals. The diversity index value obtained is 1.86. The conclusion of this study was that the composition of grasshoppers included nine types of grasshoppers found, namely Oxya sp., Catantops sp., Trilophidia sp. (1), Trilophidia sp. (2), Schistocerca sp., Acrida sp., Phlaeoba sp., Atractomorpha sp. (1) and Atractomorpha sp. (2). The value of the diversity index of grasshoppers is in the medium category with the diversity index value of 1.86.
Redesign of The Overpass Bridge Structure at Km 839+450 Toll Road Pasuruan-Probolinggo Using Parker Type Truss Bridge Ma'arif, Achmad Zakaria; Wiswamitra, Ketut Aswatama; Widayanto, Erno
BERKALA SAINSTEK Vol 11 No 4 (2023)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v11i4.29763

Abstract

The Overpass Bridge Km 839+450 Pasuruan - Probolinggo Toll Road which is located in Leces District, Probolinggo Regency, East Java has a total span length of 144 meters with a Girder I bridge type. This bridge has 5 spans with 4 pillars. The writer want to redesign the bridge into 2 spans to increase the free space under the bridge overpass. The Parker truss bridge type was chosen because it has the lightest self-weight compared to other types of steel truss bridges. This parker type steel truss bridge is planned with a length of 72 m, a width of 12 m, and a height of 13 m. The bridge is designed for 1 lane which has 2 main lanes and 1 emergency lane. From the analysis carried out, the thickness of the vehicle floor plate is 20 cm with concrete fc 30 MPa and reinforcement Fy 410 MPa. The steel structure uses BJ 41 steel quality with profile dimensions on longitudinal girders WF 300.300.10.15, transverse girder profile dimensions using WF 700.300.13.24, main frame girder dimensions using WF 552.500.50.50 & WF 552.475.25.30, transverse wind ties using WF 294.200.8.12, as well as cross wind ties using the L 250.250.35. For the connection, high-strength bolts of type A325 with Fy 820 MPa are used with a diameter of 24 mm and a connection plate which is L 100.100.10, L 120.120.12, and a 25 mm thick plate. on the main frame connection. The placement of the bridge uses the placement of Typer Elastomeric Bearings coated with steel plates with dimensions of 600x600x150 mm. Steel truss bridge parker type has the advantage that the upperstructure's own weight is lighter than the existing bridge, the difference in weight reaches 33,07 %.
The The Effect of Giving The Antioxidant Vitamin C in Tris-Egg Yolk Extender During The Preservation Period on The Quality of The Epididymal Spermatozoa of Mice (Mus musculus L.) Dewi, Efie Fadjrijah Eka; Mahriani, Mahriani
BERKALA SAINSTEK Vol 11 No 4 (2023)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v11i4.39109

Abstract

Spermatozoa preservation is a method used to store spermatozoa in a diluent solution such as NaCl or tris-egg yolk. However, the longer storage of spermatozoa in the diluent solution can generally form ROS (Reactive Oxygen Species). The addition of antioxidants such as vitamin C to the diluent is expected to be able to bind ROS so that they are not toxic to spermatozoa and sperm quality can be maintained during the preservation period. The purpose of this study was to determine the effect of giving the antioxidant vitamin C in tris-egg yolk diluent during the preservation period on the quality of mice epididymal spermatozoa. Vitamin C used in this study was 0.5 mg, 1 mg, and 2 mg in 100 ml of tris-egg yolk diluent. Observation of spermatozoa quality was carried out within 0 to 48 hours with a span of 12 hours. The results showed that the addition of Vitamin C concentrations of 0.5 mg, 1 mg, and 2 mg in 100 ml of tris-egg yolk diluent was able to maintain the percentage of motility and vitality, but the longer the storage the quality of spermatozoa decreased. The concentration of vitamin C 0.5 mg, 1 mg, and 2 mg in 100 ml of tris-egg yolk diluent is a good concentration to maintain the quality of spermatozoa during 12 hours of storage, the rest will decrease. Further research is needed to increase the storage time of spermatozoa by using vitamin C and tris-egg yolk.
Ants Density of Odontomachus sp. and Its Ecological Role in Kendari City Green Open Space Melvi Amalia, Hilda Ayu; Chairunnas, Armadi
BERKALA SAINSTEK Vol 11 No 4 (2023)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v11i4.42681

Abstract

The degradation of environmental quality has become a global problem today. One way to address this is by providing green open spaces that help maintain environmental quality. Kendari city has a number of green open spaces (RTH) including, RTH in Baruga sub-district, Kendari mayor's office area and in Nanga-nanga botanical garden of Kendari city. This study aims to determine the density and ecological role of ants (Odontomachus sp.) in green open spaces in Kendari city. The method used in this study was hand sorting using ring samples with a diameter of 20 cm and a height of 15 cm in a plot measuring 25 m x 25 m consisting of 25 sampling points with a distance of 5 m per point. Data analysis was carried out by calculating the density at each research location, namely Baruga green space, mayor's park and Nanga-nanga botanical garden. The results showed that the highest density of ants (Odontomachus sp.) was found in the mayor's park with 16 ind/m2. The ecological role of ants (Odontomachus sp.) in Kendari city green open space is an important role in bioturbation and natural predators of soil fauna such as termites and earthworms.
Synthesis of The Cu(II)-doped TiO2/Bi2O3 as a Photocatalyst for Rhodamin B Degradation Under Visible Light Ilumination Aritonang, Anthoni Batahan; Asma, Al; Sapar, Ajuk
BERKALA SAINSTEK Vol 11 No 4 (2023)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v11i4.39799

Abstract

The Cu(II)-doped TiO2 and Cu(II)-doped TiO2 /Bi2O3 compound have been synthesized using the sol gel method with titanium tetraisopropoxide (TTIP) as the TiO2 precursor and Cu(NO3)2.3H2O as the Cu(II) dopant was carried out at various concentration of 0.075%; 0.250% and 1.000%, as well as Bi(NO3)3.5H2O as a Bi2O3 precursor. Based on characterization using the DRSUV-Vis spectrophotometric method with data analysis using a tauch plot, it is known that the band gap energy of Cu(II)-doped TiO2 is 2.89 eV; 2.72 eV; 2.54 eV. The addition of Bi2O3 to Cu(II)-doped TiO2 (1%) causes a decrease in the band gap from 2.54 to 2.18 eV which is equivalent to a wavelength of 567 nm. IR spectrophotometry spectra analysis shows a shift in Ti-O absorption towards smaller wave numbers. Characterization by the XRD method shows that 1% Cu(II)-doped TiO2 /Bi2O3 has an anatase phase with a crystallite size of 24 nm. Photocatalysis activity test on the degradation of rhodamine B solution at a concentration of 10 ppm, under visible light illumination for 180 minutes was able to degrade up to 85.85%.

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