Jurnal Sains Teknologi dan Lingkungan (JSTL)
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Pengukuran Dan Pemodelan Serat Optik Dalam Kondisi Terpapar Sinar Matahari
Full text linkOptical fiber is a transmission line or a type of cable made of glass fiber or plastic which is very fine and smaller than a strand of hair, and can be used to transmit light signals from one place to the recipient. Optical cables that float and hang openly exposed to sunlight, or are embedded exposed to burning rubbish cause additional attenuation which results in signal transmission which causes communication links to break. In this research, measurements and modeling were carried out of conditions assuming an increase in heat that occurred. These conditions are carried out on a laboratory scale. Optical isolation really protects the optical fiber. This modeling will predict the useful life of optical fiber which should be used in 30 years. The measurement results are tabulated and sorted so that the distribution of temperature increases is known
Pengaruh Pemberian Pakan dari Limbah Penetasan Telur Ayam terhadap Media Pemeliharaan Lobster Pasir (Panulirus Homarus)
Full text linkChicken egg hatching waste flour can be an alternative to replace expensive spiny lobster feed because apart from being waste it is also cheap and easy to obtain. The purpose of this research is to determine the effect of feeding chicken egg hatching waste on the water quality of spiny lobster (Panulirus homarus). This research used an experimental method with a Completely Randomized Design (CRD) consisting of 4 treatments with 3 replication. The results of the study showed that the composition of chicken egg waste can influence temperature, DO, pH, salinity, nitrate, nitrite, ammonia, absolute weight growth, absolute length growth, Specific Growth Rate, Feed Conversion Ratio and Survival Rate of spiny lobste
Gambaran Ekspresi Cluster of Differentiation 44 (CD44) Pada Meningothelial Meningioma di RSUD Provinsi Nusa Tenggara Barat
Full text linkMeningiomas are mostly benign tumors that grow slowly and are very common compared to other intracranial tumors with the most frequent subtype being meningothelial meningioma. Cluster of differentiation 44 is a cell surface glycoprotein that has an important role in cellular adhesion, migration, angiogenesis, proliferation and inflammation. This study aims to examine the description of CD44 expression in meningothelial meningioma at West Nusa Tenggara Provincial Hospital. This study is a quantitative descriptive analysis research, sample 27 cases of meningothelial meningioma CD44 expression was evaluated by immunohistochemistry. Quantitative descriptive analysis to determine the percentage of the study sample. The results obtained were 19 (70.40%) age range 41-50 years. CD44 expression in meningothelial meningioma was found to be mild in 3 (11.10%), moderate expression in 5 (18.50%) and strong in 19 (70.40%). In conclusion, most of the percentages of tumor cells that were smeared were in the severe category (percentage value of more than 50 percent)
Identifikasi Perbedaan Karakteristik Mutan (M3) Padi Inpago Unram 1 dan Mutan (M3) Padi Baas Selem
Full text linkThis research aims to determine the comparison of the characteristics of the mutant (M3) of Inpago Unram 1 rice with the mutant (M3) of Baas Selem rice and the comparison of the characteristics of the mutant line (M3) with its parents. The research was carried out from March to November 2022 in Saribaye Village, Lingsar District, West Lombok. The method used is an experimental method in the field. The experiment was carried out using a Randomized Block Design (RAK) with 8 genotypes and repeated 3 times.  Blocks were planted as many as 20 plants and then 4 sample plants were taken. The data were analyzed using a significance level of 5%, then further tested using an orthogonal contrast test of 5% significance level. The results of the research showed significant differences in the characteristics of the number of productive tillers, total number of tillers, panicle length, number of filled grains per panicle, weight of 100 grains and weight of filled grains per hill, then further tests showed 6 significantly different characters in the comparison of G1, G2, G3, G4 >< G5, G6, G7, G8 (Inpago Unram 1 lines compared to Baas Selem lines). In the comparison of G1 >< G2, G3, G4 (Inpago Unram 1 parent compared with its lines) showed significantly different results regarding the panicle length character. The comparison of G5 >< G6, G7, G8 (Baas Selem parents compared with their lines) showed significantly different results regarding the character of the number of productive offspring and the total number of offspring
Keanekaragaman dan Kelimpahan Bintang Laut Di Daerah Pesisir Dusun Pandanan, Kecamatan Sekotong Barat, Kabupaten Lombok Barat
Full text linkSea stars have morphological characteristics that are radially symmetrical, have 5 (five) or more arms, do not have a skeleton and move freely using tube legs. Sea stars not only function as litter cleaners in the waters, but are also utilized as food processing and handicraft materials. The study aimed to determine the diversity and abundance of sea star species in the coastal area of Pandanan Hamlet, West Sekotong, West Lombok Regency. This study used the belt transect method. All starfish found in the transect recorded the type, number, and habitat characteristics. The results found 6 species of starfish from 4 families namely Echinasteridae, Archasteridae, Ophidiasteridae, and Oreasteridae. The six species are Henricia sp., Archaster typicus, Linckia laevigata, Culcita sp., and Pentaceraster sp. The diversity index (H') has a value of 0.3 - 1.7, the uniformity index (E) is 0.5 - 0.9, and the dominance index (C) ranges from 0.2 - 0.8. The highest abundance in the species Linckia laevigata with a value of 571 ind/ha (station 1) and 333 ind/ha (station 1), while the lowest abundance in the species Pentaceraster sp. 33 ind/ha. All starfish were found to be associated with seagrass plants except Pentaceraster sp
Komposisi Jenis dan Tutupan Lamun di Perairan Dusun Pandanan, Sekotong, Lombok Barat
Full text linkSeagrasses can live on muddy, sandy and broken coral or rock substrates. Seagrass ecosystems are often found in areas with thick sandy mud substrates. Seagrass beds are one of the aquatic ecosystems that have high water productivity, and have a vital role for the associated biota that live around them, both as a feeding ground, nursery ground, and spawning ground. The purpose of this study was to see the species composition and cover of seagrass species in the waters of Pandanan Hamlet, Sekotong, West Lombok. Seagrass data collection was carried out at low tide, using the line transect method by making the observation path into three replicates with a length of 100 m each, a distance of 50 m each transect. The 50 cm quadrat frame is placed on the right side of the transect with a distance of 10 m between one quadrant and the other so that the total quadrant on each transect is 11 quadrants. The results showed that the composition of seagrass species found in the waters of Pandanan Hamlet, Sekotong, West Lombok as many as 7 (seven) seagrass species, namely: S. isoetifolium, C. rotundata, E. acoroides, T. hemprichii, H. ovalis, H. uninervis and H. pinifolia with Seagrass Cover in the Waters of Pandanan Hamlet Sekotong, Lombok is included in the category of moderate and rare with the percentage of seagrass species S. isoetifolium (2.78%-9.36%), C. rotundata (1.39%-6.91%), E. acoroides (7.03%-14.75%), Thalassia hemprichii (2.31%-9.66%), H. ovalis (2.5%-0.98%), H. uninervis (0.038%) and H. pinifolia (4.64%). The index of importance at the 2 stations had different values. The type of E. acoroides has the highest INP value at both stations, with values of 61.54% and 62.06% respectively. Ecological Index in the Waters of Pandanan Hamlet, Sekotong, West Lombok includes: Seagrass Diversity Index with the value obtained (1.43 and 1.65). Diversity Index with values (0.8 and 0.92) and Dominance Index with values (0.26 and 0.22)
Karakter Kuantitatif dan Hubungan Kekerabatan Genotipe Padi (Oryza sativa L.) Beras Merah dan Beras Hitam yang Ditanam secara Gogo
Full text linkThis study aims to determine the appearance of quantitative characters and kinship relationships of the genotype of red rice and black rice grown in gogo. The research was conducted in February – May 2024 on a medium plain land with an altitude of 370 meters above sea level, in Tampak Siring Village, Central Lombok, NTB. The materials used were 21 rice genotypes consisting of 11 red rice strains, 4 black rice strains, 2 red rice elders, 2 black rice elders and 2 comparison varieties (Inpago Unram I and IR64). The analysis used is the Analysis of Variance (ANOVA) of the Group Random Design (GRD) model with a real level of 5%, if there are real different characters, then the Duncan Multiple Range Test (DMRT) will be continued at a real level of 5%. Cluster analysis was carried out based on the average value of quantitative characters using the euclidean distance method using the R-Studio program. The results of the study showed that between strains all characters had different appearances except for the number of non-productive saplings. G-2 strain; G-6; and G-18 had the same results as Inpago Unram I. Kinship analysis conducted based on the average value of quantitative characters obtained four clusters, namely cluster I G-21, G-9, G-20, G-11, G-17; cluster II G-19, G-2, G-18, G-6, G-7; cluster III G-1, G-5, G-8, G10, G-3, G-4, G-16; and cluster IV G-12, G-15, G-13, G-14
Evaluasi Dan Modifikasi Pola Tata Tanam Daerah Irigasi Prako Berdasarkan Ketersediaan Air
Full text linkPrako Weir in East Lombok Regency has limited water availability, which affects its ability to serve the provision of irrigation water. Failure to meet irrigation water needs is increasingly felt, so adaptation steps are needed to reduce more significant losses at the farmer level. This study aims to evaluate the current cropping pattern and obtain alternative cropping patterns that are more appropriate according to water availability in Prako Weir to minimize the potential for farmer crop failure. The study began by analysing water availability by calculating the mainstay discharge using a ranking method using Prako Weir discharge data. Continued analysing water requirements in the current cropping pattern and several alternative cropping patterns using the KP-01 method. Furthermore, the best cropping pattern was selected using the water balance method. The results obtained were the best cropping pattern according to the water availability pattern in Prako Weir, namely Rice-Soybeans-Soybeans, which began planting in early October, with an annual water surplus of 775.24 l/second. Meanwhile, the current cropping pattern, Rice-Rice-Soybeans, shows an annual deficit of 625.31 lt/second. However, if economic considerations are used, then the current planting pattern is still acceptable even though it is at risk of being unable to meet its water needs. However, a solution can be taken by providing water in turns
Pengukuran Daya Terima BTS 4G Pada Kondisi Hujan Dengan Metode Coordinated Scheduling/Interference avoidance
Full text linkThe quality of signal reception from the Base Transceiver Station (BTS) which is still installed is the highest on the 4G VoLTE network from the provider provider within the coverage area of the Mataram University Campus is still fluctuating. This needs to be carefully monitored so that users can surf the internet or use IoT facilities properly according to access requirements. data transfer needs... Conditions due to environmental disturbances such as rain are also disrupted. This requires accurate measurements, this research is done with the help of software installed on the user according to their moving position along the existing road access. The measurement results were obtained in rainy and clear sky conditions and it was found that differences and cell movement were disturbed. Recommendations to providers in this paper are input for improving the quality of providers in the Mataram University area
Analisis Komparatif Tutupan Mangrove Menggunakan Citra Landsat 9 dan Sentinel 2A di Desa Labuan Tereng Kabupaten Lombok Barat
Full text linkLabuan Tereng Village is a place where mangrove vegetation grows and develops. The location close to the harbor sheet makes the mangrove ecosystem damaged by port activities. High port activity can disrupt the condition of mangrove ecosystem development in Labuan Tereng Village. This study was conducted to evaluate mangrove health by looking at canopy cover or canopy density using the Hemispherical Photography method analyzed using Landsat 9 and Sentinel 2A to assess the extent of relationship between mangrove canopy cover and images. The findings revealed that the mean mangrove cover density value of 66% which is included in the medium category. Statistical analysis of several vegetation indexes with mangrove cover obtained the highest linear regression results in the SAVI model with a value of 0,41 for Landsat 9 images and 0,65 for Sentinel 2A images. The results of image data analysis on Sentinel 2A show a smaller pixel size value and contain more pixels so as to produce better and complex data analysis when compared to Landsat 9 imagery