BERKALA SAINSTEK
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Morphological Characteristic of Adult Armigeres subalbatus from Sumbersari Jember
Get PDFArmigeres subalbatus is a type of mosquito that is widely distributed in the world, including Jember Regency, Indonesia. The larval natural habitat is mainly found in trees that can hold water, adult mosquitoes can be found indoors or outdoors. In the field of health, Ar. subalbatus acts as a vector for filariasis, Japanese Encephalitis (JE) and zika. This study aims to identify the morphological characteristics of the Ar. subalbatus from Sumbersari Village, Jember Regency. Although in Indonesia there is no significant evidence of the role of Ar. subalbatus in the health sector, it is important to detect the morphological features of Ar. subalbatus to be able to detect mosquitoes properly. Knowing the exact type of mosquito can provide consideration for appropriate mosquito control methods. The method used is through the installation of ovitrap in November 2022. The ovitrap media is in the form of tap water, the ovitrap is left for 8 days. Ar. mosquitoes were found in the larval stage of the ovitrap. The larvae were brought to the Jember University Faculty of Mathematics and Natural Sciences Zoology Laboratory for hatching and data collection on the morphological characteristics of mosquitoes. The results of this study include the morphological characteristics used for the identification of Ar. subalbatus which includes the shape of the proboscis, flagelomeres on the palps, color of the scutum, border of the scutum, size of the antepronotum, bands on the pleura, prespiracular and postspiracular areas, edges of the mesepimeron, abdomen (tergum, sterna), apex of the femur, venation of the wings, alula and upper calypter of the wings
Performance Assessment of Agrotourism Oriented Irrigation Systems in Subak Sembung, Denpasar City
Get PDFSubak Sembung has a wide coverage area of 103 ha of rice fields with a total length of 5.1 km of tertiary irrigation canals. The Subak Sembung area has experienced land conversion of 14 ha which has had an impact on the performance of the subak system. The strategy that can be implemented to maintain the sustainability of the subak system is to develop agrotourism. Based on the survey results at the study area, there are several problems that have the potential to disrupt the performance of the irrigation system, including damage to irrigation structures and leakage of irrigation canals, and a lack of support for subak development towards agrotourism. The aim of this study was to assess the condition and performance of an agrotourism-oriented irrigation system in Subak Sembung. This research was conducted using field survey and interview methods. Field surveys were carried out with the aim of determining the conditions of agrotourism-oriented irrigation systems. Interviews were conducted to assess the performance of an agrotourism oriented irrigation system using the subak assessment form based on the Tri Hita Karana developed by the Udayana University Subak Unit and the agro-tourism form. Based on the research that has been done, it can be stated that the condition of the agrotourism oriented irrigation system in Subak Sembung is good. This is shown based on the functioning of irrigation network assets and non-irrigation networks. The performance of agrotourism oriented irrigation systems in Subak Sembung is in the range of 3.66 - 5.00 in the good category
Utilization of Bendrat Wire fiber on the Mechanical Properties of Geopolymer Concrete
Get PDFOne of the problems in the construction field, especially concrete, is to reduce cracking due to the brittle nature of the concrete itself and increase the strength of the concrete. One of the ingredients to minimize cracks in concrete is the addition of fiber in the concrete mixture. Therefore, additional innovation is needed in the manufacture of concrete. So, this research was carried out by discussing the use of bendrat wire on the mechanical properties of geopolymer concrete. This study aims to determine the results of compressive strength, split tensile strength, and flexural strength with variations in the addition of 0%, 6%, 12%, and 18% were using a 2% superplasticizer with a concrete age of 28 days. The addition of bendrat wire from 0%, 6%, 12%, and 18% of the test results has increased. For compressive strength, respectively, 40.34 MP, 40.552 Mpa, 40.977 Mpa, and 41.189 MPa. For the splitting tensile strength result, which is 2.07 MPa;, 2.123 MPa, 2.176 MPa, and 2.229 MPa. For flexural strength, 4.05 Mpa, 4.09 Mpa, 4.16 Mpa, and 4.25 MPa
Acute Toxicity Test of Jalembi Probiotic Beverages on Mice ddY
Get PDFAn 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
Effect of Air Humidity in MIG Welded Joints on Tensile Strength and Impact Strength of Aluminum 5052
Get PDFIn the shipbuilding process, delays often occur. In general, to speed up a ship's construction, overtime is carried out by workers until nighttime. Environmental conditions in a welding process, especially air humidity, strongly affect the properties of welded joints. The formation of hydrogen in the air caused by an inappropriate environment can cause defects in welded joints, especially porosity defects. Variations of welding environmental conditions used, are welding in the morning at 84% air humidity, daytime welding at 53% air humidity, and nighttime welding at 77% air humidity. This study aims to determine the material strength of air humidity variations during the welding process on the tensile strength and impact strength of 5052 aluminum material. This research uses experimental quantitative methods data analysis techniques used analysis of variance (ANOVA). The results showed that the higher the air humidity, the tensile and impact strength decreased. From the results of the tensile test, there is an influence of air humidity on the average value of tensile strength, where the highest value is found in the daytime welding variation specimen with 53% air humidity, worth 110.614 MPa. From the impact test results, there is an influence of air humidity on the average value of impact toughness, where the highest value is found in the daytime welding variation specimen with 53% air humidity, worth 89.42 J/mm2. From the ANOVA test results, the average tensile test and impact test have no significant differences
Potential of Reduction Solid Waste from Office Building (Case Study: Gedung Polda Jambi)
Get PDFSolid waste management in building can be managed with the waste management policy and waste management practice tools. It is contained in the concept of green building. The purpose of this study was to analyze the potential reduce of solid waste in office buildings which is managed by waste management policy and waste management practice tools, and provide scheme recommendations for solid waste management for office buildings the object of this study is Jambi Regional Police Office Building. The methodology was a survey method with solid waste sampling (SNI 19-3964-1994) in Building A, Building B, Canteen and Garden Area and Parking The sampling did for 8 days. Quantitative and quantitative parameters were obtained from the calculation of the generation and composition of solid waste, and also interviews. The results for the generation of solid waste on Jambi Regional Police Office Building: 40.40 kg/day or 0.027 kg/person.day (consist of 45% organic, 28% inorganic, 26% paper and B3 0.7% and others 0.3%). Recommendations scheme can be given for solid waste management in the form of the application of waste management practice tools are started from modification of the waste into separate, collection is done as often as possible, solid waste treatment is done composting and sales to waste banks. The potential for reducing solid waste if the waste management policy and practice tools are applied is 85.64% to 5.8 kg/day
Species Diversity of Grasshopper (Orthoptera: Caelifera) at the Rehabilitation Zone of the Bonangan Block, Wonoasri Resort, Meru Betiri National Park
Get PDFGrasshoppers (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