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INDONESIA
Jurnal Sains Teknologi dan Lingkungan (JSTL)
Published by Universitas Mataram
ISSN : 24770329     EISSN : 24770310     DOI : -
Core Subject : Health, Science, Agriculture,
Agriculture, Biological Sciences & Forestry Computer Science & IT Public Health
Jurnal Sains Teknologi dan Lingkungan (JSTL), merupakan media untuk publikasi tulisan asli yang berkaitan dengan sains teknologi dan lingkungan baik dalam Bahasa Indonesia maupun Bahasa Inggris. Jurnal Sains Teknologi dan Lingkungan (JSTL) merupakan jurnal ilmiah terbitan berkala dua kali setahun (Juni dan Desember).
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Articles 335 Documents
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Monitoring Tetesan Cairan Infus Berbasis IoT Yadnya, Made Sutha; Larasati, Alfiyyah Reghin; Muljono, Agung Budi; Budiman, Djulfikry
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 11 No. 1 (2025): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v11i1.753

Abstract

The need for proper and accurate medical equipment not limited by distance and time is to make monitoring of system. One part is that in patient care is to accurately monitor the flow of infusion fluids according to the fluid that comes out of the infusion in the right dose so that it can avoid complications that occur in patients. The creation of this system is to develop a manual observation system to be based on IoT (Internet of Things) with the advantages of remote monitoring of the flow of infusion fluids and being able to provide information in real time. The use of an internet network with a system of equipment has sensors to detect the weight of the infusion fluid, microcontrollers, and IoT communication modules connected to android.  
Rancang Bangun Sistem Pemantauan Suhu dan Kelembaban Udara Berbasis Arduino Uno pada Kumbung Jamur Merang Amaliah, Wenny; Putra, Guyup Mahardhian Dwi; Khalil, Fakhrul Irfan; Dewi, Endang Purnama; Sholihin, Ibadias; Hidayat, Taufiq
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 11 No. 1 (2025): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v11i1.758

Abstract

The environmental conditions of a mushroom house are a crucial factor influencing the growth of straw mushrooms, particularly in terms of temperature and humidity parameters. Therefore, it is essential to continuously monitor the environmental conditions within the mushroom house, specifically temperature and relative humidity (RH). This study aims to design a real-time temperature and humidity monitoring system based on Arduino Uno for use in a straw mushroom house. The research consists of several stages: literature review, design and assembly, programming, testing, and evaluation of testing results using the mean absolute percentage error (MAPE) method. The results show that the developed temperature and humidity monitoring system functions effectively to monitor environmental conditions within the mushroom house. The evaluation of the measurement results using the MAPE method indicates a minimum error rate for temperature and humidity measurements, with a percentage of 2.49% and 9.80%, respectively.
Optimasi Sintesis Biodiesel dari Minyak Biji Nyamplung (Calophyllum inophyllum) Melalui Reaksi Transesterifikasi Menggunakan Katalis TiO2 Arlia, Erma; Gunawan, Erin Ryantin; Murniati, Murniati; Handayani, Sri Seno; Suhendra, Dedy
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 11 No. 1 (2025): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v11i1.759

Abstract

Dependence on solar power needs can be overcome by switching to renewable energy, namely biodiesel. Biodiesel can be synthesized from non-food vegetable oil, namely nyamplung seed oil, with the help of a catalyst. The aim of this research is to optimize the synthesis of biodiesel from nyamplung seed oil through a transesterification reaction using a TiO2 catalyst. Variations in reaction conditions include the mole ratio of oil: methanol, catalyst mass, reaction time and reaction temperature. The optimum conditions for biodiesel synthesis were obtained at mole ratio of oil: methanol  1:8; catalyst 0.15 g; reaction time 150 minutes and reaction temperature 60℃ with an average yield of 76.54%. The characteristics of the biodiesel obtained include  0.877 g/mL of density, 3.65 cSt of viscosity,   234.217 mg KOH/g of saponification value, and 2.1 mg NaOH/g of acid value. The chemical composition of biodiesel resulting from GC-MS is methyl palmitate, methyl oleate and methyl stearate.
Pengaruh Dosis Pupuk NPK Phonska dan Pupuk Hayati Petrobio Terhadap Pertumbuhan dan Hasil Tanaman Kacang Panjang (Vigna sinensis L.) Aini, Zuliatul; Nikmatullah, Aluh; Suryaningsih, Liana
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 11 No. 1 (2025): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v11i1.767

Abstract

The aim of this study was to determine the effect of NPK Phonska dosage and Petrobio biofertilizer on growth and yield of long bean plants. The research was conducted from January to April 2024 at Kelayu Utara, Selong District, East Lombok. The experiment was designed according to a factorial Randomized Block Design (RBD) design with 2 factors: NPK Phonska fertilizer at five levels and Petrobio biofertilizer at two levels, thus there were 10 treatment combinations, which were 3 times. The data were analyzed using ANOVA at the 5% level, then further tested using an Significant Difference (LSD) test of 5% significance level. The results showed a significant interaction between NPK Phonska fertilizer dosage and Petrobio biofertilizer in influencing plant height at 35 days after planting (DAP) and the number of leaves at 21 DAP. NPK Phonska fertilizer, as a single factor, significantly affected plant height at 21 and 28 DAP, the number of leaves at 21, 28, and 35 DAP, flowering time, the number of flowers, the percentage of flowers turning into pods, pod weight, pod length, and pod diameter. Petrobio biofertilizer, as a single factor, significantly affected plant height at 21 DAP, the number of leaves at 28 DAP, and flowering time. In this study, the best NPK Phonska fertilizer dosage for growth and yield of long bean  plants was 16 g/plant.
Perbandingan Gradasi Butiran Sedimen Terendap Waduk Batujai dengan Material Bahan Kerajinan Gerabah Bukit Balibe Saadi, Yusron; Tampang, Tampang; Salehudin, Salehudin; Suroso, Agus; Pradjoko, Eko; Estyana, Ema; Rohmayani, Hairun Nisak; Aslam, Firar Bismi; Supardi, Supardi; Ihsan, Ihsan; Aji, Eko Usman
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 11 No. 1 (2025): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v11i1.781

Abstract

Sediment deposition is the main problem in the continuity of dam operations. Sustainable operation of dam can be maintained by dredging sediment deposited at the bottom of the impounding area. Because of the considerable costs and the lack of economic value of dam deposited sediment, dredging is carried out only when the serious sedimentation problem occurs. This research aims to analyse samples of sediment taken from various depths of Batujai Dam and to compare them with the pottery materials of Balibe Hill. Compositions of deposited sediment were analyzed to determine its potential as an alternative additional material used in pottery making. Comparisons were made based on the results of sieving analysis of material from both sources. The results show that the percentage of fine-grain material of Balibe Hill, especially grains with a diameter of ≤ 0.18 mm, is closer to the percentage of deposited sediment of Batujai Dam at an elevation of 92.5 masl and an elevation of 90.0 masl, while the percentage of coarse-grain material with a diameter of ≥ 3.35 mm is closer to the percentage of deposited sediment at an elevation of 87.5 masl. Gradation analysis indicates that composition of deposited sediment of Batujai Dam in sand grain classes can be engineered to some extent to make them closely identical to the composition of Balibe Hill materials so that it can be used as a mixture in pottery making.
Analisis Perubahan Tutupan Lahan Di Ekosistem Mangrove Kecamatan Lembar Kabupaten Lombok Barat Rahman, Andi; Hayati, Hayati; Sjah, Taslim
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 11 No. 1 (2025): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v11i1.809

Abstract

West Lombok Regency. Using the Vector Geoprocessing method, the study processes and analyzes spatial GIS data, focusing on graphical data (geometry) and attributes (identity) through ArcMap Desktop. The main analysis techniques used include overlay analysis and buffer analysis, which are very important for spatial data analysis in GIS. This study uses mangrove distribution data from 1996-2021 which is analyzed to obtain the distribution of mangroves in the desired area. In Lembar District, there are four villages that have mangrove ecosystems, namely Eyat Mayang, Labuan Tereng, Lembar & South Lembar villages. In each village from year to year there is a change in area. The mangrove ecosystem in Lembar District from year to year has experienced an overall reduction starting from 1996-2021, experiencing a decrease of approximately 69%, namely from an area of 186 Ha to 59 Ha. However, there is one village that experienced an increase in mangrove ecosystems in 2016-2021, namely an increase of approximately 3 Ha. This cannot be separated from internal and external factors that occur so that they have an impact on changes in the mangrove ecosystem in an area. The factor that most influences changes in the area of mangroves is the existence of development in the area so that it has an impact on the mangrove ecosystem.
The Sifat Mekanis Self Consolidating Concrete dengan Penggunaan Coconut Shell Ash Sebagai Bahan Tambah pada Semen Merdana, I Nyoman; Eniarti, Miko; Hajrin, Sofyan; Mahmud, Fathmah
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 11 No. 1 (2025): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v11i1.813

Abstract

In civil construction work, conreting is often becoming difficult because of limited space on concrete mold or because of congestion of reinforcement. To overcome this case, self-consolidating concrete is frequently used. This type of concrete requires Slump flow, Passing ability and Segregation resistance requirements by using cement up to 600kg/m3. The current trend in concrete technology is utuilization of Pozzolan. This research discusses the behavior of the mechanical properties of self-consolidating concrete with coconut shell ash as additives. The Coconut shell ash is produced by burning coconut shells at a temperature of 800°C for approximately 4 hours. Five series of 15x30cm concrete cylinder are prepared tested with compression loads. It is found that the coconut shell ash applied as an additive greatly affects the properties of fresh concrete. The use of coconut shell ash also has an effect on the initial setting time and final setting time of cement as well. Furthermore, the compressive strength and Modulus of elasticity of self-consolidating concrete are influenced by the use of coconut shell ash as an additive for various test ages.
Analisis Kepekaan Terhadap Perubahan Temperatur pada Aspal Modifikasi Polimer Yuniarti, Ratna; Karyawan, IDM Alit; Mahendra, Made; Hasyim, Hasyim; Rohani, Rohani; Salsabila, Fera Fitri
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 11 No. 2 (2025): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v11i2.815

Abstract

In tropical countries such as Indonesia, high-temperature resistance of asphalt is required to avoid premature damage to road pavement construction. One of the methods to solve this problem is to prepare polymer-modified asphalt. This study aimed to examine the temperature change sensitivity of polymer-modified asphalt using the penetration index value. The polymers used were HDPE, LLDPE, PVC, and styrofoam. Based on the analysis, it was concluded that the conventional asphalt 60/70 used in this study did not satisfy the minimum softening point requirement of 48 °C. With the use of polymers, modified asphalt is produced with a higher hardness than unmodified asphalt. Compared to other polymers, LLDPE-modified asphalt has the lowest penetration index value and is the most sensitive to temperature changes, making it more susceptible to permanent deformation. At all the styrofoam concentrations used, the penetration index was negative, while a positive penetration index value was achieved with 3% and 4% PVC. In HDPE-modified asphalt, the use of polymers has a significant impact and produces the highest penetration index. This indicates that HDPE-modified asphalt is more resistant to temperature changes and exhibits better performance under various weather conditions   In tropical countries such as Indonesia, high-temperature resistance of asphalt is required to avoid premature damage to road pavement construction. One of the methods to solve this problem is to prepare polymer-modified asphalt. This study aimed to examine the temperature change sensitivity of polymer-modified asphalt using the penetration index value. The polymers used were HDPE, LLDPE, PVC, and styrofoam. Based on the analysis, it was concluded that the conventional asphalt 60/70 used in this study did not satisfy the minimum softening point requirement of 48 °C. With the use of polymers, modified asphalt is produced with a higher hardness than unmodified asphalt. Compared to other polymers, LLDPE-modified asphalt has the lowest penetration index value and is the most sensitive to temperature changes, making it more susceptible to permanent deformation. At all the styrofoam concentrations used, the penetration index was negative, while a positive penetration index value was achieved with 3% and 4% PVC. In HDPE-modified asphalt, the use of polymers has a significant impact and produces the highest penetration index. This indicates that HDPE-modified asphalt is more resistant to temperature changes and exhibits better performance under various weather conditions.
Analisis Perilaku Sanitasi Wisatawan terhadap penggunaan air Bersih dan Toilet di Kawasan Khusus Ekonomi Mandalika Dujana, Lalu Muhammad Aby; Isrowati, Isrowati; Ahyadi, Hilman; Ernawati, Ernawati; Fadila, Baiq Arlina; Rahayu, Rachmawati Noviana; Rohyani, Immy Suci
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 11 No. 2 (2025): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v11i2.820

Abstract

The Mandalika Special Economic Zone (KEK) is a super priority destination in NTB with an increasing number of tourists visits every year. The increasing number of tourist visits affects the sanitation of the area. Sanitation conditions are influenced by tourist behavior. This study aims to analyze the sanitation behavior of tourists, especially in the use of clean water and toilets. The research method uses a questionnaire distribution to 96 tourists taken by simple random sampling. Determination of the number of respondents using the Slovin formula. The validity and reliability test of the questionnaire instrument was carried out first before the data was analyzed descriptively. The results of the study showed that 61% of respondents who had clean water use behavior in the Mandalika KEK had water use behavior in the "Good" category, while 39% had "Less Good" behavior. Toilet use behavior showed that 67% of respondents who had toilet use behavior in the Mandalika KEK had water use behavior in the "Good" category, while 33% had "Less Good" behavior.
Analisa Tebal Lapis Perkerasan Jalan Tgh. Faesal Menggunakan Metode Bina Marga 2017 dan AASHTO 1993 Pratama, Khendy Marsa Duta; Wahyuningsih, Titik; Efendy, Anwar
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 11 No. 2 (2025): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v11i2.823

Abstract

Roads have an important role for society, especially in economic growth and industrial development in an area. Based on BPS NTB data in 2023, the length of the Mataram City road is 460 km, where one of the roads in Mataram City, namely TGH.Faesal road, is a connecting road between Mataram City and West Lombok Regency, which can be interpreted as the main road entering Mataram City. so that the condition of the TGH.Faesal road must continue to be analyzed or reviewed regularly so that the condition of the TGH.Faesal road continues to be in good condition. This research uses secondary data obtained from the National Road Planning and Supervision of West Nusa Tenggara Province (P2JN NTB). the methods used are the Bina Marga 2017 and AASHTO 1993 methods. The analysis was carried out to determine the design comparison of each method. The Bina Marga 2017 method obtained the thickness of the actual load pavement layer and normal load, namely the surface layer of 17.5 cm, and the foundation layer of 30 cm. The AASHTO 1993 method obtained the thickness of the pavement layer, namely the surface layer of 18 cm, and the foundation layer of 52 cm.

Page 29 of 34 | Total Record : 335

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