Jurnal Sains Teknologi dan Lingkungan (JSTL)
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Pemanfaatan Data Raster Dalam Menentukan Perubahan Penutupan Lahan Sub Daerah Aliran Sungai (DAS) Biyonga Kabupaten Gorontalo
Full text linkThis study aims to analyze changes in land cover over a specific period, focusing on the influencing factors and their impacts on the Biyonga Sub-Watershed ecosystem. The method used in this research is a combination of descriptive research method with spatial analysis interpretation approach and field survey. The research findings indicate that spatial analysis of land cover in the Biyonga Sub-Watershed revealed nine land cover classes, such as forest, shrubland, settlements, and agriculture. Land use change patterns were evaluated by overlaying land cover maps from 1990 to 2020. Significant changes in land cover occurred between 1990 and 2000, where secondary dryland forest cover changed to shrubland covering an area of 2,299.98 hectares. For the period 2000-2011, it was found that there was a loss of primary forest cover totaling 2097.27 hectares, which transitioned into secondary dry land forest and shrubland. Other changes included paddy fields transitioning into settlements and dry land agriculture, and dry land agriculture transitioning into settlements. From 2011 to 2020, there was an increase in the area of secondary forest cover and transitions from shrubland and dry land agriculture to secondary forest as well as mixed dry land agriculture
Kajian Kualitas Nutrisi Pakan Terhadap Produktivitas Ayam Kampung Super di Kabupaten Lombok Timur
Full text linkThe aim of the study was to determine the type and nutritional quality of feed and its effect on the productivity of super kampung chickens in The East Lombok Regency. This research was conducted by collecting data from ten farmers with a minimum population of a thousand super kampung chickens in East Lombok. Parameters observed were the type of feed used, the nutritional content of the feed, feed consumption, harvest weight, and feed conversion. The data obtained are tabulated and then discussed descriptively by comparing the nutritional content, feed consumption, harvest weight, and feed conversion obtained with the Indonesian Nasional Standard (SNI). Based on the results of the research conducted all breeders who were the target of the study used complete feed. There are 6 types of complete feed that are used and come from 4 different companies, namely GM-PS, GM-1EJ, SB11, HDBR1-168LCR, 811K NEWHOPE, HDBR 161 A. The feed consumption obtained ranges from 1.5-3.15 kg with an average of 2.26 kg/head/period. Harvested weight ranged from 0.84-0.91 kg/head with an average of 0.87 kg/head with an FCR value of 2.68. The conclusion of this study is that in general the nutritional content and quality of the feed used have met the standards based on SNI, but not followed by productivity that meets the standards
Kelimpahan dan Biomassa Ikan Karang di Kawasan Konservasi Perairan Gili Balu, Kabupaten Sumbawa, Nusa Tenggara Barat
Full text linkThe Gili Balu Marine Conservation Area (KKP), located in Sumbawa Regency, West Nusa Tenggara, is ecologically and economically significant due to its rich coral reef ecosystems. This research aims to measure the abundance and biomass of reef fish in the KKP Gili Balu, which can be used as a basis for evaluating the effectiveness of conservation efforts in maintaining marine biodiversity. The Underwater Visual Census (UVC) method was used, recording types of reef fish at ten observation points. The results showed that the highest abundance was found on Mandiki Island, with functional fish abundance reaching 2973 ind/ha, followed by Pasareang Barat Island (1903 ind/ha) and South Kalong (1600 ind/ha). The biomass of functional fish also reflects their important role in maintaining the balance of the coral reef ecosystem. This research contributes to the scientific understanding of marine biodiversity in the KKP Gili Balu and provides a basis for sustainable conservation management efforts. Additionally, the research recorded the presence of several coralivorous and economically important fish species, although they tend to be smaller compared to functional fish. Economically important fish in the KKP Gili Balu waters were found only at four observation locations: East Belang Island, North Belang, Kenawa, and Southwest Namo. The highest value was recorded at Kenawa Island, with 93 ind/ha. These fish tend to be rare in this area, possibly due to past fishing practices
Potensi Budidaya Laut dengan Menggunakan Konsep Integrated Multi-Trophic Aquaculture (IMTA)
Full text linkAquaculture is an activity that produces waste in its production. Waste in the aquatic environment is dangerous because it can cause pollution. Source of aquaculture waste come from unetaen feed, feces and excretion products. Preventing this waste can be done by implementing an environmentally friendly aquaculture sistem that is in accordance with blue economy principles in order that aquaculture can be sustainable. One sistem that can be used is implementing Integrated Multi-Trophic Aquaculture (IMTA). IMTA is a aquaculture activity that apllies an integartion sistem between several species that are reared together. The IMTA principle is the use of nutrients in one rearing with the result that does not competition between spescies. The advantages of IMTA can minimize waste and increase profits because it can harvest more than one species
Falx Meningioma, Case Report dan Review
Full text linkMeningioma are tumors of the central nervous system that originate in the meninges and spinal cord. It is a benign, slow-growing neoplasm thought to originate from meningothelial cells. Meningiomas are usually oval lesions attached to the dura mater. Meningioma are most commonly located supratentorial to the calvaria or base of the meninges. Meningiomas can also be found in the tentorium, intraventricular or in the cerebellopontine position. Meningioma arise from meningothelial cap cells that are normally distributed through the arachnoid trabeculation. The greatest concentration of meningothelial cells is found in the arachnoid villi in the dural sinus, cranial nerve foramina, middle cranial fossa, and cribriform plate. Furthermore, meningiomas are commonly found over the convexity, along the falx, and at the base of the skull
Performa Reproduksi Ikan Kerapu Cantang (Epinephelus fuscoguttatus x lanceolatus) Skala Hatchery
Full text linkGrouper (Epinephelus sp.) is a superior Indonesian fishery commodity and has high economic value, has a high price and is an export commodity. Currently, grouper cultivation has developed, to meet the need for seeds, there is a need for a grouper hatchery business whose technology can be applied. Grouper seeds that are in demand, especially for the export market, are cantang grouper, which is a hybrid of female tiger grouper (Epinephelus fuscoguttatus) and male kertang grouper (Epinephelus lanceolatus). The aim of this research was to evaluate the reproductive performance and production performance of hybrid cantang grouper at the hatchery scale. The method used was active participation by directly following activities in the field and obtaining primary data (observation, interviews) and secondary data (literature study) at the Brackish Water Aquaculture Fisheries Center Situbondo, East Java. The stages of cantang grouper hatchery activities include container preparation, natural food culture, parent rearing, parent selection, parent spawning, egg handling, larva and fry care, water quality management, pest and disease control, as well as harvesting, packaging and transportation. The Hatching Rate (HR) value during the research obtained from stocking 150,000 eggs was 115,200 eggs or 76.8%. The Survival Rate (SR) value during the research obtained from stocking 115,200 fish with a total of 16,271 fish harvested or 14.1%
Upaya Pengurangan Limbah Kemasan Plastik Air Minum Melalui Kajian Kualitas Keran Air Siap Minum (KASM) di Wilayah Kota Bogor
Full text linkSales of bottled drinking water (AMDK) increase in line with population growth every year. Based on data from the Indonesian Plastic Industry Association (Inaplas) and BPS, Indonesia produces 64 million tons of waste/year, and 3.2 million tons of plastic waste comes from AMDK. In connection with the community's dependence on consuming AMDK, the government through the Regional Public Company (PERUMDA) Tirta Pakuan created a superior program, namely Tap Water Ready to Drink (KASM). The problem is that many residents do not take advantage of KASM's services. The aim of this research is to compare the quality of AMDK and KASM so that the public can obtain information and increase confidence in the quality, safety and cleanliness of drinking water originating from KASM. This research method includes sampling followed by analysis of physical parameters (color, odor, taste, temperature), chemical (turbidity, TDS, metals, pH, Cl-, F-, NO2-, NO3-, NH3, hardness, CN -, SO42-) and Total microbiology (Coliform, E.coli) based on quality standards PERMENKES 492/2010. KASM samples were taken at 6 points using the SNI 8995:2021 method. The AMDK sample was obtained by purchasing 5 brands of AMDK randomly. Physical, chemical and microbiological parameters were analyzed using the APHA, SNI, US-EPA methods using ICP-OES, UV-Vis spectrophotometer and nephelometer. The results show that all KASM and AMDK samples have met the quality standards of PERMENKES 492/2010. Based on the comparison of analysis results, all AMDK samples had lower quality compared to KASM samples even though other microbiological, chemical and physical parameters were not significantly different
Produksi Briket dari Limbah Plastik dan Ampas Tebu dengan Metode Pirolisis
Full text linkPlastic is a polymer product that is widely used in society. This resultx in an increase in plastic waste. Plastic waste processing needs to be done to prevent environmental emissions. Plasstic waste can be converted into an alternative energy source in briquettes. The reasearch object is to produce briquettes from plastic and sugarcane bagasse. Plastic briquettes and bagasse have a ratio of 1:2, 1:1 and 2:1. The second stage is the preparation and design of the tool using the pyrolisis method. Research variables include the composition of plastic waste and sugarcane bagasse. Analysis of briquette products includes calorific value, ash conten and water conten. The results of research on briquette products with variations in sampel A having a ratio of 1:2, sample B with ratio of 1:1 and sample C with a ratio 2:1 respectively show a calorific value of 3,929 cal/g, 4.013 cal/g, 4,222 cal/g; water content values of 8,6%, 6,7%, 5,8%, the ash content value is 5,4%, 7,2% and 8,6% and the volatile matter value is 15.3, 13.2% and 12,6%
Studi Awal Perbanyakan Cacao (Theobroma cacao L.) Asal Kebun Rakyat Lombok Utara: Pertumbuhan Bibit pada Media Tanah dengan Pupuk Kandang Sapi
Full text linkCocoa (Theobroma cacao L.) is an economically valuable crop, especially in the chocolate industry. However, cocoa seedling productivity in Indonesia faces challenges such as low-quality seedlings and suboptimal cultivation practices. This study aimed to evaluate the effect of cow manure on the growth of cocoa seedlings from smallholder farms in North Lombok, focusing on its potential as a sustainable nursery management practice. The experiment was conducted using a randomized complete block design with five treatments involving different ratios of cow manure and standard nursery media (topsoil and sand). Seedling growth parameters such as germination rate, seedling height, stem diameter, leaf number, and biomass accumulation were measured at 30, 60, and 90 days after planting. The results showed significant improvements in all growth parameters with the application of cow manure compared to the control. The best performance was observed at 300 g of cow manure per polybag, resulting in a maximum seedling height of 35.2 cm, 14.2 leaves per seedling, and a dry biomass of 34.7 g. The cow manure enhanced soil fertility, improved water retention, and supported microbial activity, contributing to better seedling vigor. In conclusion, cow manure is a viable organic amendment for cocoa seedling production, especially in resource-constrained farming system
Kajian Pengaruh Suhu Pemanasan Awal Dan Waktu Sokletasi Terhadap Perolehan Minyak Biji Kelor (Moringa Oleifera Lam.)
Full text linkSound healing, or commonly referred to as music therapy using Acoustic Sound for Wellbeing (ASW) Moringa seed oil (Moringa oleifera Lam.) has significant potential for use in various industrial sectors, including food, pharmaceuticals, and cosmetics. One of the critical factors influencing oil extraction efficiency is preheating treatment and extraction process duration. This study aims to evaluate the effect of varying preheating temperatures and Soxhlet extraction times on the yield of Moringa seed oil, as well as to determine the most optimal extraction conditions. The extraction process was conducted using the Soxhlet method with n-hexane as the solvent. Preheating temperatures used in this study ranged from room temperature to 50°C, 60°C, and 70°C, with extraction times of 2, 4, and 6 hours. The results showed that preheating treatment on moringa seeds and extraction duration had a significant impact on oil yield. The optimal conditions were achieved at a preheating temperature of 70°C with an extraction time of 6 hours, yielding the highest oil recovery of 41.74%