Jurnal Sains Teknologi dan Lingkungan (JSTL)
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Gambaran Tingkat Pengetahuan Tentang Kebersihan Gigi dan Mulut Pada Kelas XII SMK Karya Adi Husada Mataram
Full text linkKnowledge of dental and oral hygiene is very important in maintaining oral hygiene. Dental and oral hygiene is carried out to prevent dental and oral diseases, increase endurance, and improve oral function. Maintaining oral hygiene at school age is one way to improve health at an early age. This study aims to describe the level of knowledge about oral hygiene in class XII SMK Karya Adi Husada Mataram. The type of research used is descriptive survey research, which is a research method that takes a sample from a population and uses a questionnaire as a data collection tool to see the level of knowledge of dental and oral hygiene in Class XII SMK Karya Adi Husada Mataram. From the examination conducted at SMK Karya Adi Husada Mataram, it was found that the results of OHI-S scores on 30 students who had been examined were 3 students with good OHI-S scores, 10 students with moderate OHI-S scores, and 17 students whose OHI-S scores bad. The conclusion of this study is the level of knowledge about oral hygiene, the results can be obtained from the majority of respondents with moderate knowledge of 16 respondents
Estimasi Cadangan Karbon Tegakan Mangrove di Lombok Barat, Nusa Tenggara Barat
Full text linkMangrove ecosystems are a vital form of aquatic ecosystem that significantly contribute to maintaining carbon balance in the atmosphere and support climate change mitigation efforts. Their ability to absorb and store carbon in both biomass and soil makes them among the most effective carbon sinks. This study aims to estimate the carbon storage of mangrove stands in the Gita Nada Mangrove Area, Sekotong, West Lombok. The research was conducted at three stations: Station 1 (Berambang), Station 2 (Siung), and Station 3 (Bangko-Bangko). Data collection involved a 10 x 10 meter transect, where species and diameter at breast height (DBH) data were recorded. Allometric equations were then applied to calculate biomass and carbon reserve values. The results identified four mangrove species: Rhizophora mucronata, R. stylosa, R. apiculata, and Avicennia marina. The average mangrove density at each station fell within the moderate to dense category, with values ranging from 1000 to 4666.66 individuals per hectare. The estimated carbon stocks of the mangrove stands were as follows: Station 1 had 149.33 tons per hectare, Station 2 had 28.38 tons per hectare, and Station 3 had 476.36 tons per hectare. These findings indicate significant differences in estimated carbon stock values across the stations. Overall, the results of this study provide crucial information to support conservation and restoration efforts for mangrove ecosystems in West Lombok, enhancing understanding of the role of mangroves in mitigating climate change
Efektivitas Kunyit (Curcuma longa L.) sebagai Suplemen Pakan Ikan
Full text linkFeed supplements for aquaculture activities are materials that currently widely used. There are many feed supplements using herbal ingredients, because it is considered more safety for fish. It is based on prohibition of antibiotics usage, because it can create resistance in microorganisms and has a negative impact on environment. Turmeric is a spice that widely used as a feed supplement. Most turmeric is used for cooking ingredient, but it is also widely used in traditional medicine. Several active compounds in turmeric such as curcumin and turmerone have been studied. These active compound have been proven could increase antioxidant and prevent lipid peroxidation, so it can increase the fish growth. Apart from that, this active compound is also useful in inhibiting bacterial growth by damaging membrane and preventing the formation of biofilms
Perubahan Sifat Kimia Tanah Tercemar Merkuri Dengan Berbagai Modifikasi Pemberian Biochar Dan Tanaman Akar Wangi (Vetiveria zizanioides (L.)
Full text linkThe aims of this research is to determine changes in the chemical properties of mercury-contaminated soil with various modifications in the application of corn cob biochar and vetiver grass (Vetiveria zizanioides (L.). This research used an experimental method with an ex-situ remediation approach which was carried out from October 2023 to January 2024 in greenhouse. Sampling of mercury-contaminated soil was carried out on former traditional gold mining land in Segubuk Hamlet, Kuang Village, Taliwang Sub-District, West Sumbawa Regency. Soil sampling was taken from 13 locations determined by purposive sampling and carried out using a soil drill. Soil pH H2O, C-organic and CEC as well as analysis of the total concentration of mercury (Hg) in the soil were analysed before and after the experiment. The results showed that the application of corn cob biochar alone and corn cob biochar planted with vetiver grass (Vetiveria zizanioides (L.) had a significant effect) on changes in soil chemical properties and was effective in reducing the concentration of mercury (Hg) in the soil. Corn cob biochar application can improve soil chemical properties by increasing soil pH, organic C, and soil CEC. On the other hand, the release of H+ ions from the carboxyl functional group (-COOH) in corn cob biochar has the opportunity to form complexes with heavy metal ions so that it can reduce their concentration of mercury in the soil
Evaluasi Kadar Antosianin Beras Merah dan Hitam Serta Formulasi Sediaan Masker Peel-Off
Full text linkBrown rice and black rice have high levels of anthocyanins so they have the potential to be developed as peel-off masks. This study aims to determine the anthocyanin levels of brown rice and black rice ethanol extracts and carry out formulations and evaluations of the physical properties of the peel-off mask formula with the highest anthocyanin levels. The anthocyanin levels of the two samples were determined using the pH difference method. Black rice samples produced the highest anthocyanin levels. Peel-off mask preparations are formulated from samples with the highest anthocyanin levels. Evaluation of the preparation includes organoleptic testing, homogeneity, dispersal power, pH and the time the preparation dries. Anthocyanin levels of black and red rice were 123.2±6,312 and 24.9±4,117 mg/100 gr, respectively. The maske r peel-off preparation was successfully formulated from black rice with a content of 1%. The evaluation results showed that the peel-off mask was purple, gel shape, distinctively scented, homogeneous, spreading power was 6.0 cm, pH 5.0 and the preparation time dried 20.33 ± 0.15 minutes. Based on research, it can be concluded that the formula of the peel-off mask of 1% black rice ethanol extract has met the physical requirements of the preparation
Identifikasi kandungan fucoidan yang diekstrak dari Sargassum sp. yang diambil dari Pantai Pantai Sundak, Gunung Kidul
Full text linkThis study aims to identify the fucoidan content extracted from Sargassum sp. collected from Sundak Beach, Gunung Kidul. Fucoidan is a sulfated polysaccharide compound with various biological activities, including anticoagulant, antitumor, and anti-inflammatory activities. Sargassum sp. was chosen as the source of fucoidan due to its abundance in coastal waters and its pharmacological potential. The extraction method was carried out using a hot water extraction technique with acid treatment, followed by a purification process using dialysis. The extracted fucoidan content was then analyzed using spectrophotometry and Thin Layer Chromatography (TLC) to determine its concentration and purity. Fourier Transform Infrared (FTIR) spectroscopy was used to identify the functional groups of the compound. The results showed that fucoidan was successfully extracted from Sargassum sp. with a significant yield. The main component of the extracted fucoidan from Sargassum sp. in this study was fucose, as indicated by the TLC results. The Rf value of the fucoidan hydrolysate from Sargassum sp. and the standard fucoidan, which was 0.51, matched that of fucose, indicating that both samples contained fucose. This study concludes that Sargassum sp. from Sundak Beach, Gunung Kidul, is a potential source for high-quality fucoidan production
Pemanfaatan Eceng Gondok dan Crude Palm Oil sebagai Bioaditif Bahan Bakar Kendaraan Bermotor
Full text linkEceng gondok contains chlorophyll which is an oxygenate type additive which can increase the combustion reaction in fuel and reduce exhaust emissions. Therefore, eceng gondok has the potential to be used as a bioadditive in fuel by adding carotene from crude palm oil which functions as an antioxidant through electron transfer, thereby protecting chlorophyll from autooxidation. The two chlorophyll and carotene extracts at a ratio of 0:1, 2:3, 3:1, 4:1, 3:2, and 1:0 respectively were mixed with toluene and Fatty Acid Methyl Ester as a bioadditive formula. in gasoline fuel. The research results show that there is an increase in octane value of 0.1-0.5% according to ASTM D 2699 and GC-FID and results in a reduction in CO and CO2 exhaust emissions of 52.38% and 37% respectively. .00% on the use of chlorophyll : carotene (2:3) bioadditives in gasoline. This shows that eceng gondok and crude palm oil can be used as bioadditives in gasoline motor vehicles
Pendampingan Ibu Hamil Sebagai Upaya Meningkatkan Perilaku Kesehatan dan Persalinan di Fasilitas Kesehatan
Full text linkLow coverage of antenatal care (ANC) and mothers’ delivery conducted not in the health care facilities were two major problems related to maternal health care in of the West Nusa Tenggara Province. The accompaniment to pregnant women could be solution to prevent the risks of pregnancy by increasing the coverage of ANC and directing mother to deliver in health care facilities. This study aims to study the effect of mentoring pregnant women on maternal health behavior during pregnancy until delivery. A quasi-experiment study was conducted in two districts namely East and Central Lombok. Two public health centers ‘Puskesmas’ were selected in each districts. They differed as the intervention and controlled health centers. The criteria for the both health centers were having high number of pregnant women, but low coverage of maternal health services. The control health centers defined as having the closest distance from the intervention one. Study population of this study were all pregnant women in the study area. Sample were selected for those women with the gestational age of 24-26 weeks and willing to be accompanied further or neither not delivery. The total of 130 women were randomly selected from the study population. Results showed the accompaniment of pregnant women was able to increase the score of health behavior as compare to the control group. Pregnant women with accompaniment were 30 times higher chance of better health behavior (OR=30.89; 95%CI=10.72-84.40), and 3 fold prefer to deliver at health facilities (OR=2.89; 95%CI=1.16-7.21). Other positive impact of accompaniment was the obedience of iron pill at least 90 tablets, as well as food supplementation taken. Student accompaniment brought a positive impact to pregnant women on health behavior and delivery in health facility
Rancang Bangun Sistem Kontrol dan Monitoring Tekanan Gas Pada Biodigester Berbasis IoT: Analisis Waktu dan Stabilitas Koneksi ESP32 dan ESP32-S3 (Lilygo T Display S3)
Full text linkThis study explores the increasing demand for efficient gas pressure monitoring systems in biodigesters, which play a crucial role in renewable energy production. The primary objective of this research is to design and develop a control and monitoring system based on the Internet of Things (IoT) utilizing the ESP32 and ESP32-S3 (Lilygo T Display S3) microcontrollers. An analysis was conducted to assess the connection duration and stability of both microcontrollers, focusing on the time required to establish a WiFi connection and connect to the Arduino IoT Cloud. The results indicate that the ESP32 achieves an initial WiFi connection time of approximately 10 seconds, with total connection durations ranging from 1 minute 3 seconds to 1 minute 36 seconds, while the ESP32-S3 encounters challenges in maintaining stable connectivity, resulting in total connection times between 1 minute 7 seconds and 1 minute 21 seconds due to certificate validation issues. These findings underscore the importance of selecting the appropriate microcontroller to optimize IoT applications for gas pressure monitoring systems in biodigesters, providing insights for developers and researchers to enhance the efficiency and reliability of renewable energy technologies
Keanekaragaman, Dominansi, Daya Adaptasi dan Kehilangan Hasil Beberapa Varietas Kacang Tanah (Arachis hypogeae L.) Akibat Kompetisi Gulma Berdaun Lebar di Lahan Kering
Full text linkThe aim of this research is to determine the weed species that play the greatest role in causing yield loss of several peanut varieties in dry land. The research was carried out on dry land owned by farmers in Pesanggrahan village, Montong Gading sub-district, East Lombok Regency, for 8 months. The research consisted of two stages, the first stage was descriptive research which aimed to observe the character of weed diversity using the basic principles of vegetation analysis, to obtain data on weed growth, population, density, frequency and dominance. Meanwhile, the second study used an experimental method, and the experiment was designed using a randomized block design, with a split plot pattern. As the main plot there are three varieties of peanuts, namely the Kidang, Gajah and Kelinci varieties. Meanwhile, the sub-plot consists of five treatments, namely weed-free plants during their growth, plants with weeds of all types of weeds during their growth, plants with weeds only from grasses, sedges and broad leaves during their growth. The results of the research show that Poaceae weeds are dominant during plant growth with quite high distribution and dominance index values, so they remain dominant during plant growth. The adaptability of the three varieties of rabbits, sheep and elephants is very low in the grass weed growing environment. The adaptability of the Elephant variety is higher than that of Rabbits and Sheep, especially in plant growing environments with sedge and broad-leaved weeds. The highest loss of crop yield occurred in the treatment of all types of weed plants and in the treatment of weed plants. Meanwhile, the lowest occurred in the treatment of broad leaf weed plants