Jurnal Sains Teknologi dan Lingkungan (JSTL)
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Analisis Karakteristik Aliran Irigasi Perforasi Pada Lahan Datar: Analysis of Perforated Irrigation Flow Characteristics on Flat Land
Get PDFPerforation irrigation is a unidirectional beam irrigation system that can be used for crop irrigation on dry land, due to the efficient use of water and the ability to wet land with a limited area. Therefore, the perforation irrigation system needs to be studied further in relation to the area of land that can be irrigated and the distribution of discharge to each perforated pipe. By testing several variations of the water level, the perforation irrigation emission capability will be obtained in the form of irrigation distribution, uniformity, emission capability and discharge amount used in irrigation on flat land. This study aims to determine the perforation irrigation capacity on flat land, the distribution of irrigation and the amount of discharge required. The test was carried out on three perforated pipes made of ½†PVC as lateral pipes, three transmission pipe length variations, such as 0.8m, 1m, and 1.2m with a distance between the perforations of 60 cm. The source of irrigation water comes from a 3 m tall tower with a capacity of ± 200 ð‘™ð‘–ð‘¡ð‘’ð‘Ÿ. The test uses three variations of head height, namely h1 350 cm, h2 360 cm, h3 370 cm and h4 380 cm. The results showed that the perforation irrigation jet length was around 100cm -120 cm, the uniformity of CU irrigation was above 97% with a total discharge on h1 QT = 0.689 lt/s, h2 QT = 0.690 lt/s , h3 QT = 0.695 lt/s and on h4 QT = 0.701 lt/s. While the range of flow rates for perforation 1 pipe Q1 (0.42 lt/s – 0.429 lt/s), perforation 2, Q2 (0.13 -0.145 lt/s) and perforation 3, Q3 (0.129 - 0.135 lt/s
Analisis Produksi Serasah Mangrove pada Hutan Mangrove Desa Kurau Timur, Kabupaten Bangka Tengah, Bangka Belitung: Analysis Production of Mangrove Litter in the Mangrove Forest of Kurau Timur Village, Central Bangka Regency, Bangka Belitung
Get PDFMangrove forests have many ecological functions such as retaining and trapping sediments, dampening waves, providing protection for fish and other biota, and assimilating nutrients. Most of the nutrients returned to the forest floor are in the form of litter. Litter has an important role for the soil and the microorganisms in it. This study aims to measure the productivity of mangrove litter in the mangrove forest of Kurau Timur Village, Central Bangka Regency, Bangka Belitung. The method used to measure litter production is litter storage using a 1m x 1m litter trap with litter collection every 7 days for 3 months. Environmental parameter data analysis was performed by PCA (Principal Component Analysis). The rate of litter production in the mangrove forest of East Kurau Village is with a dry weight of 2.72 gr/m2/day. The components that make up litter are grouped into 3 components, namely leaves (66%), stems (18%), and flowers/fruits (16%). The litter layer on the mangrove forest floor of Kurau Timur Village is with an average dry weight of 69.02 grams, a water content of 40.73%, and an estimated average biomass of 3.08 tons/ha
Kajian Sifat Fisik Tanah Ustifluvents Sekotong Terkait Kandungan Merkuri (Hg) Dalam Tanah: Assesment of Physical Properties of Ustifluvents Sekotong Releted to Mercury (Hg) Content in Soil
Get PDFPeople's gold mining in Sekotong, also known as Unlicensed Gold Mining (PETI), causes environmental pollution problems because located at the surrounding community processes gold using the amlagamation technique with the help of mercury (Hg) in binding gold. Mercury waste discharged directly into the environment could have adversely affects public health and degrades soil and water quality. The presence of mercury in the soil is strongly influenced by soil characteristics, one of which is soil physical properties. The purpose of this study was to determine the relationship between the physical characteristic ustifluvents Entisol soil of Sekotong soil and mercury content at 0-20 cm soil depth. This research was conducted using descriptive method with survey technique. Soil sampling was conducted at 3 location points near the logs and tailling at a depth of 0 - 10 cm and 10-20 cm, each location point was replicated 3 times. The selection of soil sample points was based on contour differences that affect the proportion of mercury content at each soil depth. The results showed that the highest mercury content was at point 3 with an average value of 0.3089 ppm and there was a strong to very strong relationship between soil physical properties and Hg content
Skrining Fitokimia Hasil Ekstraksi Bertingkat Daun Jengkol (Archidendron jiringa) dan Aplikasinya Sebagai Zat Antijamur: Phytochemical Screening of Jengkol Leaf (Archidendron jiringa) Sequential Extraction Result and Its Application for Antifungal Agent
Get PDFPhytochemical screening and antifungal activity test of jengkol leaf (Archidendron jiringa) extract have been carried out. The purpose of this research is determine secondary metabolite content and antifungal activities of jengkol leaf extract. Extraction of jengkol leaf was conducted with sequential extraction technique with various solvent such as hexane, ethyl acetate and methanol respectively. FTIR characterization of jengkol leaf extract show the presence of O-H, C-H C-O and C=O groups. Based on phytochemical sceening test, jengkol leaf extract contains phenolic, flavonoid, tannin, sterol, and alkaloid compound. Antifungal test was investigated on Candida albicans by disc diffusion methods. Jengkol leaf extract that was obtained from methanol extraction show inhibiton zone to Candida albicans of (1,42 ± 0,16) mm, while extraction with ethyl acetate and hexane aren’t show inhibition zone. Antifungal test result showed that jengkol leaf extract has potential as antifungal agen
Pengaruh Proses N-Hexane Solvent Extraction pada Ekstraksi Bitumen dari Aspal Buton sebagai Bahan Baku Minyak Bumi Nonkonvensional: The Effect Of Solvent N-Hexane Extraction on Bitumen Extraction from Butone Asphalt As A Raw Material af Non-Conventional Natural Oil
Get PDFButon tar sand or commonly known as asbuton is a natural tar sand deposit found in Buton Island, Southeast Sulawesi. The reserve of asbuton is approximately 179.1 million tons with a hypothetical resource of oil amounting to 10,577,646,000 liters. Asbuton is potentially used as an alternative raw material for non-conventional oil. Non-conventional oil from asbuton could be used as a substitute to the depleted resources of conventional oil in Indonesia. Asbuton non-conventional oil could be prepared by extracted bitumen, a heavy hydrocarbon material in asbuton tar sand from its mineral. The bitumen then could be further processed to produce non-conventional oil. Various studies have been carried out to extract bitumen with various solvents. This study uses direct extraction and soxhlet extraction methods with n-hexane solvent to obtain the most optimum percentage of bitumen. Direct extraction method is done by varying the temperature (40, 45, 50, 55, 60oC) and the weight ratio of asphalt and n-hexane solvent (1:20; 1: 30; 1:40; 1:50). Based on the results of research that has been done, the highest percentage of bitumen yield is formed at 40oC and at a ratio of 1:20 that is 88.60% for the direct extraction method. The 1:40 ratio of soxhlet solvent extraction has the highest bitumen yield of 90.97%. After that, a characteristic analysis was carried out using FTIR with a strong absorbance in the area of 1423.47; 1033.85; 873.75; 709.80 cm-1 representing the C-H and C = H groups
Survei Demam Secara Massal Berhasil Mengendalikan Wabah Malaria Di Pulau Bungin Kabupaten Sumbawa Nusa Tenggara Barat : Pelajaran Tentang Pentingnya Deteksi Agresif Di Salah Satu Pulau Terpenting Di Dunia: The Mass Fever Survey Was A Success In Controling Outbreak Malaria In Bungin Island, Sumbawa District, West Nusa Tenggara : Lesson In The Importance Of Aggressive Detection On One Of The Most Populous Islands In The Worlds
Get PDFBungin Island is a very small island where population density is high, with a total population of 3,287 in a 2 kilometer-square area. The Annual Parasite Index (API) on Bungin Island in 2006 was 16,0 per thousand people. Outbreaks of malaria in Bungin Island are correlated with several controllable factors. The goal of this study is to aggressively detect and treat malaria, as well as to identify the factors that contribute to malaria outbreaks. Data was collected from the resident of Bungin Island who came to Sub-Primary Health Center Bungin Island in October 1, 2007. The data collection when outbreak malaria occurs, consisted of anamnesis, physical examination and test for type of malaria. A finger prick blood sample was collected and tested with rapid diagnostic test (RDT) for type of plasmodium. Treatment base on standard treatment for malaria from Indonesian Health Department was given to the subjects were malaria positive. The total 201 subjects was tested by RDT, in which 93 positive malaria (46,27%). Most of them were infected by Plasmodium vivax (97.85%) and only 2 subjects were infected by Plasmodium falciparum (2.15%). There were 23 subjects (24.27%) showed malaria positive without clinical symptoms. The subjects positive malaria with clinical symptoms, 8.57% were found to have spleenomegaly and 7.14% were found to have hepatomegaly. Incidence of malaria decrease siginifantly in few week after aggresive detection and appropriate treatment. A few years later, malaria incidence was disappeared. The incidence of malaria in Bungin Island was high when an outbreak occured. Aggressive detection with mass blood survey could find asymptomatic malaria in the population and appropriate treatment would decrease positive malaria until it disappeared
Hubungan Antara Perbedaan Beban Trauma Dengan Gambaran Histopatologi Inflamasi Otak Tikus Pasca Mengalami Cedera Otak Traumatik: Relationship Between Differences In Trauma Load With Histopathological Description Of Rat Brain Inflammation Post Traumatic Brain Injury
Get PDFBrain injury is a damage to the brain, not congenital or degenerative, but caused by an attack or physical impact from the outside. Traumatic brain injury (TBI) is an injury that occurs when a force transmitted to the head or body causes neuropathological damage and dysfunction. TBI is one of the most common head injuries worldwide. This disorder affects 2% of the world's population each year and is the leading cause of death and serious disability in children and young adults. Getting hit or bumped into objects, motor vehicle crashes and falls, and intentional self-injury are the most common causes of TBI. This study aims to determine the histopathological description of brain inflammation in post-traumatic brain injury rats and analyze the relationship between differences in trauma burden and histopathological features of brain inflammation in post-traumatic brain injury rats. This research is an experimental study conducted by giving treatment to the object under study and then observing it. Sampling in this research will use purposive sampling. Where the researcher has determined the criteria of the sample to be used in the study so that it can represent the population. The results of this study indicate that there is a relationship between differences in trauma load and the percentage of rat brain inflammation after experiencing traumatic brain injury. The results of data analysis from this study for the Pearson test obtained a significance value of 0.00 so that there is a correlation between differences in trauma load and the percentage of brain cell inflammation in rats after experiencing traumatic brain injury. The Pearson correlation value of this data is 0.7621 which means a strong correlation. The results showed a significant inflammatory picture compared to the histopathological appearance of rat brain cells in normal samples
Kajian Rekayasa Lalu Lintas Simpang TNI AU Rembiga Akibat Rekayasa Sistem Satu Arah pada Jl. Dr. Wahidin : Traffic Engineering Study of the TNI AU Intersection Rembiga Due to One Way System Engineering at Dr. Wahidin Street
Get PDFTNI AU Rembiga intersection is a three-way link between the central point of Mataram city, which is also connected to the Rembiga intersection and the Dakota intersection, Rembiga. Dr. Wahidin street is an economic pathway for education, offices, and trade. At certain times, the traffic flow is very congested because the road is also the direction to West Lombok district. Based on observations at the research location, it was found that the distance between the Rembiga intersection and the TNI AU intersection was 322.8 meters which caused the movement of traffic flow to be less than optimal between the intersection distances so that it would affect performance at TNI AU intersection. For this reason, the purpose of this study was to examine the performance of the unsignalized intersection at the TNI AU Rembiga intersection due to the continued flow from the Rembiga intersection which is a signalized intersection due to a one-way system engineering carried out on the Dr. Wahidin street and before the implementation of the one-way system on the Dr. Wahidin street. This research was conducted with reference to the MKJI 1997, in which researchers conducted field observations, then collected primary data and secondary data. There is traffic flow engineering on Dr. Wahidin street, by creating a one-way system, had an impact on changing the performance of the unsignalized intersection at the TNI AU intersection to a level of service F with obstructed flow conditions, low speed whereas, before the implementation of the one-way system the level of service was E with stable flow conditions, stalled vehicles
Aplikasi Beads Komposit Chitosan – Clay Sebagai Adsorben dalam Penyerapan Ion Klorida (Cl-) Pada Air Payau: Application of Chitosan – Clay Composite Beads as Adsorbent to Removal of Cl- Ions in Brackish
Get PDFWater resources found in coastal areas and islands in terms of water quality are still relatively low, so treatment is necessary. Chitosan and clay are adsorbents that can be applied in various techniques to overcome environmental pollution. Chitosan is a natural adsorbent that has a high adsorption capacity but has low mechanical stability and is easily dissolved in an acidic medium. Clay is an adsorbent with a large specific surface area and has high mechanical stability. This research uses chitosan – clay beads, which aim to increase mechanical stability environmental resistance, and efficiency in brackish water treatment. It is located in Bandar Sungai Village, Sabak Auh District, Siak Regency. The research was conducted by varying the concentration of chitosan–clay beads (1:0), (1:0,25), (1:0,5), and (1:0,75) (w/w) to decrease the chloride ion (Cl-) in brackish water. The characterization of chitosan-clay beads with the water absorption test obtained the best results at the concentration variation (1:0), which was equal to 694,079%. The mechanical strength test obtained the best results at the concentration variation (1:0,75), which was 6,23 kgf. The characterization of chitosan-clay beads using SEM showed that the beads had larger pores. The results obtained show the best chloride ion removal efficiency (Cl-) of 90,828% with a final concentration of 113 mg/L at a concentration of chitosan – clay beads of (1:0.5) with a sampling time of 30 minutes. The research results have met the quality standards set by the Government Regulation of the Republic of Indonesia Number 22 of 2021 concerning the Implementation of Environmental Protection and Management
Uji Potensi Hasil Beberapa Mutan Padi Beras Hitam Generasi Ketiga (M3) Hasil Induksi Mutasi: Yield Potential Evaluation of Several Third-Generation (M3) Black Rice Mutants Resulting from Mutation Induction
Get PDFThis study aims to determine the yield potential of several third-generation (M3) black rice mutant strains resulting from mutation induction. The experiment was conducted in a paddy field located in Saribaye Village, Lingsar District, West Lombok Regency, West Nusa Tenggara, from March to November 2022. The experimental design used was a Randomized Block Design (RBD) with nine rice genotypes as treatments, repeated three times. These consisted of seven mutant strains of black rice and two controls, namely the Baas Selem and Inpago Unram varieties. The data were analyzed using Analysis of Variance at a significance level of 5%. In case of significant differences among treatments, further analysis was conducted using the Duncan Multiple Range Test (DMRT) at a significance level of 5%. Based on the research findings, two genotypes of third-generation black rice mutants (M3) resulting from mutation induction were identified. These genotypes, namely D3G46(13) with a yield potential of 5.64 tons/ha and D3G62(19) with a yield potential of 5.84 tons/ha, exhibited higher yield potential compared to their parental strains. However, both of these genotypes have not yet achieved or surpassed the yield potential of the control treatment, which is the Inpago Unram with a yield potential of 8.17 tons/ha