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Jurnal Sains Teknologi dan Lingkungan (JSTL)
Published by Universitas Mataram
ISSN : 24770329     EISSN : 24770310     DOI : -
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 137 Documents
PEMANFAATAN SERAT TANDAN KOSONG KELAPA SAWIT (TKKS) DALAM PRODUKSI ETERNIT YANG RAMAH LINGKUNGAN Tarkono Tarkono; Hadi Ali
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 1 No. 1 (2015): Jurnal Sains Teknologi & Lingkungan
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (425.475 KB)

Abstract

Penelitian mengenai sifat fisis dan mekanik eternit berbasis serat tandan kosong kelapa sawit (TKKS) telah dilakukan.  Pembuatan eternit berbasis serat TKKS  merupakan usaha untuk mengeliminir bahaya dari serat asbes yang persediaanya terbatas. Metode penyusunan serat dengan variasi persentase serat 5%, 10%, 15%, 20%, 25%, 30% dan 35% terhadap vulume CaCO3  dan sebuk marmer. Dalam penelitian ini digunakan campuran serat TKKS, semen, powder marmer dan batu kapur.  Hasil pengamatan menunjukkan bahwa eternit berbasis serat TKKS menghasilkan karakteristik beton serat pada kondisi optimum menghasilkan nilai daya hantar panas (λ) = 0,623 kkal/mhoC,  kerapatan (ρ) = 1519 k g/cm3, daya serap air  = 24,28 %, kekuatan lentur = 92,016 kg/cm2. Penggunaan serat TKSS pada produksi eternit memiliki potensi  untuk diproduksi secara masal. Nilai daya hantar panas, kerapatan  dan daya serap air  telah memenuhi standar eternit, sedangkan  kuat lentur belum memenuhi standar.Kata kunci : eternit,serat, TKKS
Pengujian Sifat Fisika dan Listrik Minyak Kelapa Sebagai Alternatif Isolasi Pada Trafo Daya Ni Made Seniari; Sumawarti Sumawarti; IK Wiryajati; Supriyatna Supriyatna; I.A.Sri Adnyani; Bagus Widhi Dharma.S
JURNAL SAINS TEKNOLOGI & LINGKUNGAN 2021: Special Issue, Oktober 2021
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v0i0.230

Abstract

Transformer oil insulation material is the result of processes from petroleum, the material that is not able to be renewed, increasingly scarce, expensive, an imported commodity, and the need is increasing. So it is necessary to strive for alternative transformer oil that comes from renewable materials, based on domestic production, increases the added value of a commodity and environmentally friendly. The alternative transformer oil in this case is coconut oil. For this reason, it is necessary to test the feasibility of coconut oil as an alternative to transformer oil which includes testing of physical, chemical and electrical properties. The test results are compared with the standard transformer oil according to the IEC. The test results, the flashpoint and dielectric strength are feasible as an alternative to transformer oil, the density, volume expansion coefficient and viscosity of coconut oil are not suitable for use as an alternative to power transformer insulation oil. The percentage in terms of physical properties is 25%, with 4 tests of 10 existing physical properties. The feasibility of electrical properties is 50% with 1 test of 2 existing electrical properties.
Penerapan Ragam Pola Agroforestri Terhadap Pendapatan dan Cadangan Karbon di Kawasan Hutan Sesaot Lombok Barat Markum Markum; Andy C Ichsan; Maiser Saputra; M Rifky Tirta Mudhofir
JURNAL SAINS TEKNOLOGI & LINGKUNGAN 2021: Special Issue, Oktober 2021
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v0i0.241

Abstract

The Sesaot forest area has been managed by the community through the Social Forestry scheme with an agroforestry system. The objectives of the study were to identify the diversity of agroforestry patterns, analyze incomes on various agroforestry patterns, analyze the amount of carbon stock and analyze the most optimal agroforestry patterns. The method used is descriptive through a series of observations, interviews and Focus Group Discussions, to 42 respondents and measurement of carbon stocks in 18 farmer locations. Analysis of agroforestry patterns was carried out by making clusters based on plant dominance, analyzing the amount of carbon using allometric equations and analyzing the optimal value of agroforestry patterns using scoring. Based on the results of the study, it can be concluded that: there are four agroforestry patterns in the Sesaot Forest Area, namely, candlenut dominant agroforestry, mahogany dominant agroforestry, mixed agroforestry and simple agroforestry. The largest income was obtained in the mixed agroforestry pattern and the smallest was in the mahogany dominant. Meanwhile, the largest amount of carb on stock was found in the mahogany dominant and the smallest was in the simple agroforestry. The results of the scoring analysis show that mixed agroforestry practices are in the most optimal category compared to other agroforestry patterns.
Evaluasi Penyimpanan Spermatozoa Ayam Pada Suhu 5⁰C, 26⁰C Dengan Pengencer Infuse NaCl, Glukosa 5% dan 10% Asnawi Asnawi; Maskur Maskur; Adji Santoso Dradjat
JURNAL SAINS TEKNOLOGI & LINGKUNGAN 2021: Special Issue, Oktober 2021
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v0i0.242

Abstract

The purpose of this study were to compare the quality of spermatozoa stored at 26⁰C, 5⁰C using diluents of NaCl, 10% glucose and 5% glucose. The spermatozoa of a rooster was collected and divided into 6 parts, each 2 tubes diluted in a ratio of 1:1 using NaCl, Glucose5% and Glucose 10%, then each 3 tubes with different diluents were stored at 26⁰C and 5⁰C. Observations of motility, viability and abnormalities of spermatozoa were carried out half an hour, 1 hour after dilution, followed every 2 hours until the ninth hours. The results showed that spermatozoa stored for 9 hours at a temperature of 26⁰C with a physiological diluent of NaCl, 10% Glucose and 5% Glucose each were different (P, < 0.05) with motility 50 ± 0.0%, 42 ± 10.95. % and 34±8.94%, respectively. At storage temperature of 5⁰C for 9 hours, physiological NaCl, 10% glucose and 5% glucose were significantly different (P<0.05) with motility 58.00±10.95%, 46.00±8.94% and 38.00±, respectively. 10.95% in a row. The viability of spermatozoa at 26⁰C storage with 5% glucose diluent was better than 10% glucose and physiological NaCl (P<0.05), 58.93±1.27%, 42.93±1.48% and 33.43±1.27% , while the physiological NaCl diluent and 10% glucose were not significantly different (P>0.05). At 5⁰C storage the viability of spermatozoa in the three diluents was not significantly different, with values of Glucose 10%, Glucose 5% and physiological NaCl 52.57±5.15%, 52.21±5.02% and 48.14±8.09%, respectively. Spermatozoa abnormalities at storage temperature 26⁰C and 5⁰C for 9 hours using physiological NaCl diluent, 5% glucose and 10% glucose, were not significantly different and varied between 5 to 10%. Finally, it can be concluded that at room temperature storage less than 4 hours the quality of spermatozoa was better with 5% glucose diluent, while for cold storage beyond 4 hours the quality of spermatozoa with NaCl diluent was higher
Kajian Kualitas Pelayanan Menuju Peningkatan Kepuasan Pelanggan Eksternal Fakultas Pertanian Universitas Mataram Tajidan Tajidan; Anwar Anwar; Hery Haryanto; Bambang Dipokusumo
JURNAL SAINS TEKNOLOGI & LINGKUNGAN 2021: Special Issue, Oktober 2021
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v0i0.243

Abstract

The purpose of this study was to measure the service quality of the implementing unit of higher education institutions, to measure the level of external customer satisfaction, and to analyze the relationship between service quality and external customer satisfaction levels. To achieve these objectives, research was carried out by combining observation methods, distributing questionnaires to 200 external customers, focus group discussions, and public consultations. As the unit of analysis in this study, external customers consist of parents of students, alumni, graduate users, and cooperation partners. The collected data were analyzed using descriptive statistical analysis, and non-parametric statistical analysis, namely Spearman rank correlation. The results showed: the service quality of higher education implementing units is identical to the level of satisfaction of external customers; achievement of the level of external customer satisfaction is from good to very good; external customer satisfaction of alumni and graduate users is in a good position, while external customers of students' parents and cooperation partners are in a very good position. 
Performan Produksi dan Kapasitas Suplay Sapi Bali Bibit dan Potong di Kabupaten Lombok Barat, Nusa Tenggara Barat M Ashari; Lalu Wirapribadi; Rr. Agustien Suhardiani; Happy Poerwoto; Rina Andriati
JURNAL SAINS TEKNOLOGI & LINGKUNGAN 2021: Special Issue, Oktober 2021
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v0i0.244

Abstract

This research was conducted in West Lombok Regency with the aim of knowing the production performance and supply capacity of Bali cattle seeds and beef in West Lombok district. The research was conducted by survey method. The research sample consisted of farmers and the livestock they kept. This research was conducted in two sub-districts and three sample villages were selected for each sub-district. The number of samples is 60 farmer respondents. The variables observed included body weight, body size, birth rate, mortality rate, calf harvest, calving period and age of rejection. The data collected were analyzed descriptively. To determine the level of production and supply capacity of Bali cattle, seeds and cuts, the data were analyzed using Dania guidelines. Structure The population of Bali cattle consists of 33.33% calves, 21.21% young and 45.45% adults with a child harvest rate of 26.97% and a mortality rate of 2.49% of the population. The average body weight of Bali cattle in West Lombok Regency, weaning calf, young and adult, respectively, is 129.65, 247.98 and 275.75 kg adults with gumba height, 99.08 weaning calves, 112.75 young and adults 118.45 cm. The supply capacity of breeder cattle and beef cattle in West Lombok Regency is 24.28% of the population, consisting of 6.51% beef cattle and 17.76% breed cattle. 
Serapan Hara N, P, K dan Pertumbuhan Tanaman Jagung Pada Berbagai Dosis Pupuk Anorganik dan Organik di Tanah Inceptisol Mulyati Mulyati; Baharuddin AB; R Sri Tejo Wulan
JURNAL SAINS TEKNOLOGI & LINGKUNGAN 2021: Special Issue, Oktober 2021
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v0i0.245

Abstract

The use of inorganic fertilizers has an important role in increasing plant growth and production. But it also causes various problems such as decreasing soil organic matter, soil acidity, soil degradation, nutrient imbalance and increasing environmental pollution. Therefore, it needs to be balanced with the provision of organic fertilizers. A field experiment was conducted to study the effect of application of various doses of inorganic and organic fertilizers on N, P, K nutrient uptake and maize plant growth. The experimental design used was a randomized block design arranged in a factorial manner consisting of two factors. The first factor is the dose of inorganic fertilizer (A): 0, 150 and 300 kg ha-1 phonska and the second factor is organic fertilizer plus (P): 0, 10, 20 tons ha-1. The two factors were combined and each treatment combination was repeated three times. The data obtained were analyzed by analysis of variance at the 5% level of significance. The results showed that there was no interaction between the application of inorganic and organic fertilizers on the growth and nutrient uptake of N, P and K. However, the application of inorganic and organic fertilizers had a significant effect on all tested agronomic traits except for plant height. Nutrient uptake of N, P and K also increased significantly due to the application of inorganic and organic fertilizers. The balance of inorganic and organic fertilizer application increases the availability of nutrients as well as the uptake of N, P, and K nutrients by maize plants.
Defisit Air Pada Berbagai Fase Pertumbuhan dan Pengaruhnya Terhadap Karakter Kuantitatif Beberapa Genotipe Kacang Tanah A Farid Hemon; Sumarjan Sumarjan; Baiq Erna Listiana; Suprayanti Martia Dewi
JURNAL SAINS TEKNOLOGI & LINGKUNGAN 2021: Special Issue, Oktober 2021
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v0i0.247

Abstract

This study aims to determine the effect of water deficit at various phases of plant growth on the quantitative characters of several peanut genotypes. This study used a completely randomized design-split plot design.  The water deficit consisted of 6 treatments: d0 = no water deficit, d1 = water deficit from germination to harvest, d2 = water deficit from germination to age 25 days after planting (dap) (vegetative phase), d3 = water deficit from age 26  to 50 dap (flowering phase to pod formation), d4 = water deficit from age 51 dap to 75 dap (seed filling phase), and d5 = water deficit from age 75 dap to 100 dap (seed ripening phase until harvest). The peanut genotype used consisted of 10 genotypes. The results showed that water deficit in various phases of plant growth resulted in different quantitative characters in several peanut genotypes. Genotype G3T4 produced heaviest dry pod weight of 12.7 g plant-1 in water deficit from germination to harvest. Genotype G200-I produced heaviest dry pod weight of 11.5 g per plant-1 in water deficit in the vegetative phase. Genotype G3T4 produced heaviest dry pod weight of 13.3 g per plant in water deficit the generative phase. Genotype G300-II produced heaviest the dry pod weight of 11.7 g per plant-1 in the water deficit of the seed filling phase. Genotypes G2D2, G2T3 and G200-I produced the heaviest dry pod weight of 11.0 g per plant-1 in the water deficit of the seed ripening phase.
Periode Kritis Jagung Manis Berkompetisi dengan Gulma Pada Entosil Lombok Tengah I Ketut Ngawit; M Taufik Fauzi
JURNAL SAINS TEKNOLOGI & LINGKUNGAN 2021: Special Issue, Oktober 2021
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v0i0.248

Abstract

Weeds are not always detrimental to plants, because there is a period of time when they are most influential on plant growth and yield and a period of time when weeds are present is called critical piriode. A research aimed to determine the critical period of sweet corn with weeds in Central Lombok entisoles. The experimental research method with experiments in the field used a randomized block design (RBD), which consisted of 12 treatments, weed-free plants (TBG) from planting to age, 10;20;30;40;50 and 60 days and the plants were allowed to roll (TG). since planting until the age of 10;20; 30; 40;50 and 60 days. The results showed that the presence of tolerable weeds on sweet corn plants was only until the age of 30 days after planting. Weeds must be weeded after the plants are between 30-40 days old, if done after the plants are 40 days old, the crop yields cannot be saved. The critical period for sweet corn competing with weeds on the Lombok Tengan entisol is in the age range between 30-40 days after planting. Plants that compete with weeds for 40, 50, and 60 days after planting (until harvest) experience a decrease in yield of 60.32%, 82.84% and 98.66%. Meanwhile, plants that did not compete (weed free) for only 10, 20 and 30 days experienced a decrease in yield of 98.61%, 80.16% and 61.40%. 
Teknik Pengisian Ulang Baterai Alkaline Nonrecharable Bekas Untuk Memperpanjang Umur Pemakaian I Nyoman Wahyu Satiawan; Supriono Supriono; Ida Bagus Fery Citarsa; I Made Budi Suksmadana; Warindi Warindi
JURNAL SAINS TEKNOLOGI & LINGKUNGAN 2021: Special Issue, Oktober 2021
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v0i0.249

Abstract

Alkaline battery is one type of battery that is designed for single use. As a result, there is a lot of waste or alkaline battery waste. To reduce the impact of alkaline battery waste, it is deemed necessary to conserve batteries, namely by extending their service life, thereby delaying the battery to become waste. The easy way is to recharge the battery so that it can be used again. Although alkaline batteries are disposable batteries, from the characteristics of the electrochemical reactions it can be seen that the chemical reactions can be reversed so that there is a possibility that the batteries can be recharged. Some of the limitations in recharging include the condition of the battery, recharging strategy, the limit on the number of charging cycles and the capacity of the battery when it is recharged. This paper discusses the procedure for conserving used alkaline batteries to increase the use time and at the same time reduce the negative impact of battery waste on the environment. The stages of the battery charging experiment are: 1) detecting the quality of used alkaline batteries, 2) determining the proper way of recharging and 3) estimating the number of safe recharge cycles before being recycled. The experimental results show that: 1) the detection of rechargeable batteries can be carried out by the short initial charge method and checking whether there is an increase in battery capacity, 2) the combined method of constant voltage and constant current is the fastest and safest way to recharge alkaline batteries, 3) the average alkaline battery can be recharged up to 8 times. 

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