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Jurnal Sains Teknologi dan Lingkungan (JSTL)

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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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Karakteristik Marshall pada Campuran Aspal Dingin dengan Asbuton Akibat Dari Penggunaan Aditif Wetfix-BE I Gede Mardawa; Ervina Ahyudanari; Suryawan Murtiadi
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 6 No. 1 (2020): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v6i1.149

West Nusa Tenggara Province consists of two main islands namely Lombok and Sumbawa. Regency Roads on Lombok Island, especially rural roads, has been severely damaged due to lack of routine maintenance. The types of damage that occur are cracks, small holes, and even large pools that endanger road users. This study aims to obtain a mixture of new materials in order to obtain an easy and fast repair method without reducing the quality during its intended life. In the meantime, repairing with CAD (cold asphalt mixture) requires curing time of 3x24 hours to achieve standard material quality with Marshall Characteristics according to the 2010 Bina Marga Specifications. This study combines CAD using BP (rejuvenating agent) and Wetfix-BE additive to get optimal results without curing process. The BP used is asphalt mixture, kerosene, and bunker oil stirred in a mixing machine into one unit. The results showed the optimum concentration of this mixture was 0.3% wet-be additive, 4.50% BP in CAD with asbuton proportion of 25%. In the fatigue test with a cyclic loading of 100 kPa, the pavement mixture is able to resist a fully loaded truck of 7731 times. In conclusion, this mixture combination is able to speed up the asphalt binding time by making briquettes according to the 2018 Highways Specifications without going through the long curing process.

Analisis Tren Kebakaran Hutan dan Lahan di Indonesia Periode Tahun 2015-2019 Arisman Arisman
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 6 No. 1 (2020): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Forest and land fires are disaster events that continue to recur every year. This study aims to determine patterns / trends in the occurrence of forest and land fires in Indonesia. The method used in this study is a descriptive statistical analysis and spatial analysis. The results showed that the occurrence of forest and land fires had the same pattern where the maximum peak of forest and land fires occurred in September. Another trend shown in the last five years is forest and land fires are fluctuative in which the frequency of events increases, the number of provinces affected also increases, but the area of land affected has an average of around 24.3% of the land area of Indonesia. Spatial analysis result shown the pattern of hotspot occurred in main province consist of Central Borneo, West Borneo, South Sumatera, Riau and Jambi. From this study it can be seen that the problem of forest and land fires is still high and need attention from the government

Karakter Tanaman Kelor (Moringa oleifera Lam.) Aksesi Kabupaten Lombok Utara Wahyu Risna Rianto; Sumarjan Sumarjan; Bambang Budi Santoso
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 6 No. 1 (2020): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

The research aims to describe the morphological character and determine the genetic relationship among the Moringa oleifera Lam. accessions grown and develop in North Lombok Regency. The study was conducted in February-May 2017, using descriptive methods and direct surveys and purposive sampling with the observation sheets and questionnaires consisting of 38 accession samples. Data were analyzed using Hierarchical Cluster Analysis SPSS 16 program. The results shows that the closest gentic relationship was between Bayan-3 and Bayan-4 accessions with a coefficient value of 12.21 and the farthest between Pemenangr-1 and Gangga-2 accessions with coefficient values of 70.77. Among of the 38 accessions observed, it was divided into 8 groups, and at the phenon distance line 25 there was a merger between the Ganga-2 accessions and other accession groups. There was a close level of geetic relationship among the moringa plant accessions in North Lombok Regency.

Karakterisasi Buah Mangga Berdasarkan Nilai Dielektrik Menggunakan Teknik Double-Ring Resonator Suthami Ariessaputra; Cahyo Mustiko Muvianto; Kurniawan Yuniarto; Sudi Mariyanto Al Sasongko; Syafaruddin Ch
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 6 No. 1 (2020): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Mango is one of the agricultural products in West Nusa Tenggara Province. The quality of post-harvest mangoes also needs to be known so that the quality produced can be maintained. Fruit quality in the tropics can be seen from the respiration rate, hardness, weight loss, total soluble content (TSC), discoloration and acid content. In addition, the quality of post-harvest mangoes can also be detected using sensors that emit microwaves with a certain value. This technique is non-destructive so it does not damage the object used. Double-ring resonators are used as sensors to detect the characteristics of mangoes. Vector Network Analyzer (VNA) is used as a tool to produce S11 and S21 skatering values, then the skatering values are processed into dielectric values. The test was carried out on the type of Gincong Gincu Mango which was divided into 4 categories, namely ripe mango on the tree, very ripe, thick and raw. Double ring resonator sensor can detect and distinguish the maturity level of mangoes based on the value of S21 in the frequency range of 0.39 to 0.49 GHz. In that frequency range, the average gain value of ripe on tree is -21.4 dB, over ripe is -22.8 dB, early ripe is -25.4 dB and unrip mango is -33.4 dB. While the characterization of mangoes using impedance values can be seen in the frequency range of 0.41 - 0.47 GHz. The average impedance value of ripe on tree is about 0.073, over ripe is about 0.067, early ripe is about 0.057 and unripe mangos is about 0.032

Evaluasi Kesiapsiagaan Batan Menghadapi Kegagalan Teknologi Nuklir Melalui Penerapan Occupational Health and Safety Assessment Series (OHSAS) 18001 Yusabiran Yusabiran; Freddy Johanis Rumambi; IDK Kerta Wirdana
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 6 No. 1 (2020): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Indonesia has nuclear technology which has 3 research reactors developed. The three reactors are Triga Mark II power of 250 kW, Kartini power reactor 100 kW and the largest reactor is Multipurpose Reactor G.A Siwabessy with 30 MW power. Based on the IAEA capacity of 30 MW is included in the second hazard category that has the potential of radiation distribution up to a radius of 5 KM. One of the efforts implemented is with the implementation of OHSAS 18001 on each work unit. In progress, evaluation should be carried out. The evaluation model used is Context evaluation model, Input, Process, Product (CIPP) according to Stufflebeam. This research is a descriptive qualitative research that is important to evaluate the application of OHSAS 18001 in support of BATAN preparedness. Data completion techniques use interviews, observation, and documentation. The results of the context evaluation study indicate that OSH policy of PTKRN, PTLR, PRFN and PTRR work units get good value (100%). Evaluation of scores (inputs) from identification aspects of potential hazards, identification of rules, role resources and OSH programs are both good (91%). Evaluate the implementation (process) of aspects of training, monitoring and measurement, audit, and simulation of emergency response well (94%). Result evaluation (Product) for K3 culture aspect and zero accident result is good (81%). Thus the implementation of OHSAS 18001 in BATAN can support BATAN nuclear preparedness

Kalibrasi Persamaan Thornthwaite Dan Evaporasi Panci Untuk Memprediksi Evapotranspirasi Potensial Pada Daerah Dengan Data Cuaca Terbatas Humairo Saidah; Heri Sulistyono; Muh. Bagus Budianto
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 6 No. 1 (2020): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Determination of irrigation channel dimensions is determined by the number of consumptive use values that are empirically determined by the potential evapotranspiration value (ETo). Due to the limited lysimeter measurement data, the ETo value is usually approached by an empirical method using weather data input. The recognized standard method for its reliability and can be used universally in determining ETo values is the FAO Penman-Monteith method. However, the use of this method is only possible if complete weather data is available. This study modified the simplest ETo calculation method, the Thornthwaite method and the evaporation pan method to obtain ETo values as accurate as FAO PM resulted. Callibrations are made by finding the correction number to get the best results shown by the high of correlation number and the efficiency index value. The results obtained are for the area with limited weather data condition, the Thornthwaite method both before and after calibration has better accuracy than the evaporation pan method. While the calibration carried out successfully increased the correlation number and efficiency index of both methods significantly. The results of the two calibrated methods, the Thornthwaite method provides better and satisfactory performance with a ratio between 0.86 and 0.89 and the efficiency index reaches 0.78.

Aktivitas Antibakteri dari Ekstrak Etanol Ganoderma sp. Asal Pulau Lombok Adelina Oktaviani; Aida Muspiah; Faturrahman Faturrahman
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 6 No. 1 (2020): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

The use of antibiotics that are not according to the rules and antibiotics in the long term can cause resistance to bacteria. This study aims to determine the presence of antibacterial activity and the effect of increasing the concentration of ethanol extract of Ganoderma sp. against several test bacteria. Extract from Ganoderma sp. obtained by maceration method using ethanol 95% solvent. The extract concentrations used were 20%, 40%, 60% and 80%. This research was conducted using the wells method with ciprofloxacin as a positive control and 50% DMSO as a negative control. The parameter measured is the large diameter of the inhibition formed around the well. The results of the antibacterial activity test of ethanol extract Ganoderma sp. has greater inhibitory activity against gram-negative bacteria. The inhibitory activity of ethanolic extract of Ganoderma sp. on the growth of test bacteria increased with increasing concentration of the extract

Analisis Karakteristik Marshall pada Beton Aspal Lapis Pengikat (Asphalt Concrete-Binder Course) menggunakan Aspal Modifikasi Serbuk Serat Pelepah Batang Pisang Desi Widianty; Ratna Yuniarti; Akmaluddin Akmaluddin; Agung Prabowo; Shofia Rawiana
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 6 No. 1 (2020): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Asphalt modification by adding fiber powder of banana stem can be implemented to improve the performance of pure asphalt. Asphalt concrete binder course AC-BC is a flexible pavement layer that functions to distribute the load towards the foundation layer. So it really needs strength, durability and stability of the materials. For that, it is necessary to use asphalt modification with fiber powder of banana stem which is used as a binding material in AC-BC asphalt concrete mixture. The proper percentage of modified asphalt level will determine the optimum quality of an asphalt mixture. Asphalt concrete specimens were made in 3 (three) samples for each variation of asphalt level by 5%; 5.5%; 6%; 6.5%; and 7%. The asphalt optimum level in the mixture is carried out through volumetric investigation in the form of VMA, VIM, and VFB values and mechanical assessment in the form of stability, flow and Marshall Quetient. The results of data analysis found that the value of VIM, stability and MQ tend to decrease with increasing levels of modified asphalt. On the other hand the value of VMA, VFB and flow tend to rise with increasing levels of modified asphalt. However, from the five variations of asphalt levels obtained asphalt levels of 5% and 5.5% which meet all the specifications of AC-BC asphalt concrete specification. To determine the asphalt optimum level, the average of qualified asphalt level is taken. So that the asphalt concrete AC-BC will produce a better structural performance at 5.25% asphalt level with banana stem fiber powder on asphalt by 0.1%.

Jaringan Drainase Kawasan Sesela Kecamatan Gunung Sari Rina Septiana; Hermanto Hermanto; Suryawan Murtiadi
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 6 No. 1 (2020): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Sesela area is one of the areas in Gunung Sari district, West Lombok. In this Sesela area, there are puddles or floods that disturb the community, especially those in the area of Jati Sela Village. The purpose of this study was to determine the high rainfall, and the existing canal are still able to accommodate the flood discharge or not. In this study began with data collection namely primary data collection and secondary data collection. Then conduct data analysis, namely hydrological analysis and hydraulic analysis. Based on the results of hidrological analysis, the amaount of rain R2th was 86,298 mm and R5th was 108,642 mm. Based on the results of calculations with a 5 year return period (R5th) comparison of the results obtained flood discharge is greatest at Griya Praja Asri canal is equal to 1,872 m³sec⁻¹. While the calculation is based on 11 sections hydraulics existing canals, namely Johar Pelita canal, Griya Praja Asri canal, Pesona Raya 1 canal, Perum Elite Rinjani Asri canal, Pesona Raya 2 canal, Ireng Daye canal, Ireng Lauk 2 canal, Pesona Raya 3 canal, Jati Ireng canal, Ireng Lauk 1 canal, and Pesona Raya 4 canal almost all of them can not accommodate flood discharge, causing water overflow or puddles. To overcome the overflow of water that occurs in the canal, redimensions are carried out so that the canals can function optimally.

Analisis Kualitas Air Di Lahan Reklamasi Pertambangan Nikel Desa Mohoni, Petasia Timur, Morowali Utara FX Anjar Tri Laksono; Indra Permanajati; Rahmat Mualim
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 6 No. 1 (2020): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

In Mohoni Village, East Petasia District, North Morowali Regency there are nickel mining activities that are carried out by PT. Asiamax Mining Indonesia. Several locations were mine out status. Hence, reclamation programs are made to improve environmental conditions before mining. One of these stages is water quality tests to ensure that the reclamation area is worthy to be a habitat for animals and plants. The purpose of this study is to find out the water quality in the reclamation area of the ex-nickel mining in Mohoni Village. The storet method is used to analyze water quality whose test parameters include pH, total suspanded solid (TSS), concentrations of copper (Cu), cadmium (Cd), zinc (Zn), lead (Pb), nickel (Ni), chromium valence 6, iron (Fe), manganese (Mn), and cobalt (Co) once every three months for a year.The quality water check results are compared with the environmental quality standards in accordance with law number 32 of 2009. Based on the average monitoring results show that the water quality is classified as moderately polluted. The conclusion from this study is that reclamation land might be not used as habitat for animals and plants because the availability of water is not suitable for consumption

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