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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 14 Documents
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Search results for , issue "Vol. 7 No. 1 (2021): JURNAL SAINS TEKNOLOGI " : 14 Documents clear
Pengaruh Penambahan Jamur Tiram (PLEUROTUS SP.) Terhadap Nilai Komposisi Kimia Dan Organoleptik Bakso Ayam Broiler Ria Harmayani; Nefi Andriana Fajri
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 7 No. 1 (2021): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v7i1.181

Abstract

Experimental research aimed to determine the effect of the addition of oyster mushrooms on the chemical composition and organoleptic value of broiler chicken meatballs. The research was corried out for 4 months from July to October 2020. The making of broiler chicken meatballs and organoleptics tests was carried out at the Laboratory of the Faculty of Animal Science UNW Mataram and chemical composition analysis was carried out at the INMT Laboratory of Mataram University. The research design used was a completely randomized design with 4 treatments, namely the addition of oyster mushrooms as much as 0%, 10%, 20% and 30% of the weight of chicken meat and each treatment there were 5 replications. The data from the research on the chemical composition of chicken meatballs were analyzed using variant analysis and continued with the LSD test and the organoleptic values were obtained using a hedonic scale from 30 panelists who were somewhat trained as replication, then analyzed using the Friedman Test. The analysis of variance result showed that the addition of oyster mushrooms in broiler’s chicken meatball dough had a very significant effect (P >0.01) on the value of chemical composition, namely moisture, ash, fat, fiber and protein content and had a significant effect (P>0.05) organoleptic values are colour preference, taste and aceeptance of meatballs, but it has no significant effect (P< 0.05) on the preference for aroma and texture of meatballs. The formulation of addition oyster mushrooms to broiler chicken meatballs based on the chemical composition value is the addition of 10% oyster mushrooms containing the highest protein of 8.51±0.014%, when compared to the addition of mushroom addition 0%, 20% and 30% and has met Indonesian National Standard for combination meatball and can be recomended for as nutritional terapy in the midst of the Covid-19 pandemic. Based on the organoleptic value, the formulation of broiler chicken meatballs with the addition of oyster mushrooms as much as 30% can provide higher organoleptic (colour, taste and acceptability) when compared to the addition of 0%, 10% and 20%.
Konversi Empiris Summary Magnitude, Local Magnitude, Body-Wave Magnitude, Surface Magnitude, dan Moment Magnitude Menggunakan Data Gempabumi 1922-2020 di Nusa Tenggara Barat Rian Mahendra Taruna; Anggitya Pratiwi
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 7 No. 1 (2021): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v7i1.198

Abstract

The existence of magnitude type variation from existing earthquake catalogue sources show that uniforming process is necessary. Beside that these type of magnitude will saturates in certain value, which are different with moment magnitude (Mw) which is not saturated and can describe earthquake process better. Our research initially did compatibility test between summary magnitude which is largely used by BMKG with other magnitude type. Furthermore, the purpose of our research is determination of empirical relation between magnitude type summary magnitude (M), local magnitude (ML), body-wave magnitude (mb), dan surface magnitude (Ms) which are usually used by earthquake catalogues to Mw. Method used in this research is linear regression using data set from BMKG, ISC-EHB, USGS, and Global CMT catalogues with are limited in West Nusa Tenggara and surrounding area. Data used in this research contains of 24.703 earthquake events during period May 9th 1922 until June 27th 2020. The result of this research shows there was good relation between M magnitude type with others magnitude type. Our research also found a conversion formula of M, ML, MLv, mb, and Ms to Mw with well-defined correlation.
Pengaruh Aktivitas Tambang Galian C Terhadap Perubahan Lingkungan Fisik Di Kecamatan Parangloe Kabupaten Gowa M Riza Pratama; Fadhil Surur
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 7 No. 1 (2021): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v7i1.200

Abstract

In addition to contributing PAD, the excavation mining activities in Gowa have also resulted in various impacts of environmental damage in the form of land subsidence, erosion, deposition (sedimentation), noise, dust and disturbed groundwater levels. This condition not only causes a decrease in the quality of the environment but also has a very serious impact on human health and psyche. This study aims to determine how much influence the c excavation mining activity has on changes in physical environmental conditions and to determine the mining management strategy of the c quarry in Parangloe District, Gowa Regency. The method of data collection was carried out by using field observation techniques, interviews, agency surveys, documentation and literature review methods. The analysis used in this study is multiple regression analysis and SWOT analysis. Based on the results of the analysis, it is found that mining activities affect infrastructure, environmental quality and institutions. Meanwhile, mining activities do not affect the facilities. The quarry management strategy based on the results of the analysis is a strategy that uses strength and takes advantage of opportunities, namely the management of mining C by utilizing local technology and resources in improving the regional economy.
Modifikasi Sifat Mineralogi dan Fisiko-Kimia Bahan Tanah Vertik dengan Ball Mill Berenergi Tinggi Joko Priyono; Ismail Yasin; Bustan Bustan
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 7 No. 1 (2021): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v7i1.203

Abstract

test of modifying the properties of vertic material by using a ball milling technique was carried out with the primary aim to eliminate the vertic (swelling-shrinking) property and increase the electrical charge of the material. The clay fraction of Vertisol was dried and ball milled for 5, 10, and 20 minutes. Results reveal that the clay fraction of the soil material was dominated by montmorillonite mineral, and ball milling for > 5 minutes transformed the crystalline montmorillonite into amorphous (non-crystalline) particles. Those changes were followed by increasing the vertic features, cation exchange capacity, water holding capacity, and suspension effect of the milled material. The improvement of vertic characteristics might be due to the increase of electric charge of the milled particles. Thus, high-energy ball milling was an effective technique to improve the reactivity and vertic property of vertic material of Vertisols. Further studies are needed to evaluate the potential uses of modified vertic materials as ceramic material, cement component, adsorbent of heavy metals, and other contaminants, or catalysator
Daya Hambat Krim Minyak Atsiri Herba Boborangan (Hyptis brevipes) sebagai antibakteri terhadap Staphylococcus aureus Arviani - Arviani; Dwi Larasati
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 7 No. 1 (2021): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v7i1.204

Abstract

Boborongan (Hyptis brevipes) is empirically used in ethnomedicine containing of essential oil which it is applied to inhibit the growth of the Staphyllococcus aureus. Cream preparation along with oil in water emulsion is often applied due to easiness and compliance particulary for  cosmetic and aesthetic use. This study aimed to determine the minimum inhibitory concentration of cream based essential oil of Hyptis brevipes against Staphylococcus aureus. Essential oil from Hyptis brevipes was isolated using the water vapor distillation method. Cream based essential oil of Hyptis brevipes of 0.1%, 0.2%, and 0.4%, respectively. Antibacterial activity study was carried out using a well diffusion method. Antibacterial inhibition was obtained by measuring the clear zone on the medium. The results of the antibacterial inhibition test showed that the cream based Hyptis brevipes essential oil along with concentration of 0.1%, 0.2%, and 0.4% showed antibacterial activity with the diameter of inhibition zone are 5.3 mm; 5.1 mm; and 6 mm, respectively. Therefore, it prooved that the essential oil of Hyptis brevipes was a promising candidate for antibacterial substance
Penentuan Konstanta Laju Pengeringan Coconut Chips Hary Kurniawan; Sukmawaty Sukmawaty; Ansar Ansar; Kurniawan Yuniarto; Murad Murad; Rahmat Sabani
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 7 No. 1 (2021): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v7i1.205

Abstract

This study aims to determine the drying rate constant of coconut chips using an oven. Coconut chips drying is carried out at drying temperatures of 50 ° C, 60 ° C and 70 ° C. Drying coconut chips has been conducted at an initial water content of 40-50% wb until it reached ± 10% wb. The change of moisture content was measured every 15 minutes, and the measurement of the water content was determined by the thermogravimetric method. Newton's model was used in determining the observation drying rate constant. Furthermore, the observation drying rate constant was applied to predict the drying rate constant as a function of temperature using the Arrhenius equation. The results showed that the predicted drying rate constants ranged from 0.0090 - 0.0130 minute-1. 
Telaah studi kandungan probiotik pada fermentasi makanan khas di pulau Jawa Novita Kusuma Wardani; R. Susanti; Talitha Widiatningrum
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 7 No. 1 (2021): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v7i1.208

Abstract

The food industry is one of the commodities that always grows and develops in line with the increasing needs and demands of the market. The growth in demand for fermented foods in the market is due in part to the increased interest in healthy food and the awareness of consumers' perceptions that fermentation is a naturally beneficial process. The ferementation process is inseparable from the role of probiotic microorganisms, bioactive compounds, and micronutrients produced through microbial action. This literature review study aims to analyze the role of probiotics in the fermentation of typical foods in Java, which have the potential to act as an immune regulatory system. The results of a literature study on various kinds of fermented specialties in Java and the manufacturing process show that the microbes that play a role in food fermentation consist of mold and bacteria. These microbes have the potential as an immune regulatory system.  
ANALISA SIFAT LISTRIK DAN KANDUNGAN Fe NANO PARTIKEL PASIR BESI BERBASIS PASIR BESI SUNGAI UNTUK MENGETAHUI KUALITAS AIR SUNGAI Nuraini Saprianti; Lalu A. Didik; Ahmad Zohdi
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 7 No. 1 (2021): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v7i1.209

Abstract

Penelitian ini bertujuan untuk mengetahui nilai kandungan mineral, karakteristik sifat listrik, konstanta dielektrik pasir besi serta mengetahui kualitas air sungai Pohgading desa Pohgading kecamatan Pringgabaya kabupaten Lombok Timur. Metode yang digunakan dalam penelitian ini yaitu metode deskriptif kuantitatif. Sintesis nanopartikel pasir besi yang diambil dari jarak 2 meter, 4 meter, 6 meter, 8 meter, dan 10 meter disintesis menggunakan metode kopresipitasi. Setiap sampel kemudian di AAS untuk mengetahui berapa persen (%)   andungan mineral pasir besi. Dari hasil penelitian diperoleh nilai kandungan mineral pasir besi sungai Pohgading tersebar merata ditiap jarak pengambilan yakni 0,0172%, 0,0171%, 0,0172%, 0,0172%, 0,0172%. Pengukuran sifat listrik pasir besi sungai Pohgading menggunakan metode empat titik probe untuk menentukan resistivitas pasir besi dan plat sejajar untuk menentukan konstanta dielektrik. Resistivitas pasir besi sungai mengalami peningkatan ditiap-tiap jarak, pada jarak 2 meter sampai  jarak 10 meter diperoleh 1,1 x 103Ωm sampai 1,7 x 103Ωm. Begitupun dengan nilai konstanta dielektrik, dimana pada jarak 2meter sampai 10 meter diperoleh 1,7 x 104F sampai 3,5 x 104F. Untuk kualitas air sungai dapat diketahui melalui analisis PH, suhu, konduktivitas dan TDS air. Sebelum dicampur dengan nanopartikel pasir besi PH air, suhu air, konduktivitas air dan TDS air diperoleh sebesar 5,95, 28,5°C, 640μS/cm, dan 370 ppm. Setelah dicampurkan nilai PH meningkat ditiap-tiap jarak pengambilan, pada jarak 2 meter sampai 10 meter diperoleh sebesar 5,97 sampai 6,00. Sedangkan suhu, konduktivitas dan TDS air sungai semakin rendah.
Penyisihan Polutan pada Palm Oil Mill Effluent (POME) Menggunakan Konsorsium Mikroalga-Bakteri dengan Sistem High Rate Algae Reactor (HRAR) Shinta Elystia; Vonny Meidina Rizani; Sri Rezeki Muria
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 7 No. 1 (2021): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v7i1.213

Abstract

Palm oil mills in addition to producing crude palm oil also produce by-products in the form of Palm Oil Mill Effluent (POME). POME contains high amounts of organic ingredients and pollutants. One method that can be applied to treat POME is the High Rate Algae Reactor (HRAR) System. The HRAR system uses microalgae-bacterial consortium that has better performance in removing pollutants in POME and increasing the growth of microorganisms. This research aim by determining the effect of microalgae suspension concentration in the HRAR system towards the removal efficiency of Chemical Oxygen Demand (COD) and total nitrogen. The research was conducted in batch in the HRAR system that equipped with a paddle wheel, by variations of microalgae suspension concentration as 0; 10; 15; 20; and 25 (% v/v). The research was carried out for 7 days and used the sun as a source of light. Based on the research results, 25% of microalgae suspension concentration has the highest microalgae cell density, was 6,34 x 106 cells/mL and showed the best removal efficiency of COD and total nitrogen, were 78.79% and 80.37%.  
SIFAT VOLUMETRIK CAMPURAN LASTON MENGGUNAKAN ASPAL MODIFIKASI GETAH PINUS DAN LIMBAH STYROFOAM Ratna Yuniarti; Hasyim Hasyim; Rohani Rohani; Desi Widianty
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 7 No. 1 (2021): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v7i1.214

Abstract

Sifat volumetrik campuran pada laston merupakan salah satu faktor yang menentukan durabilitas (keawetan) lapis perkerasan jalan. Untuk meningkatkan keawetan lapis perkerasan jalan dan mengurangi dampak negatif terhadap lingkungan dapat dilakukan antara lain melalui modifikasi aspal dengan getah pinus dan limbah styrofoam. Tulisan ini bertujuan untuk mengkaji sifat volumetrik campuran laston menggunakan aspal modifikasi getah pinus dan limbah styrofoam tersebut. Sifat volumetrik campuran laston yang dikaji adalah rongga dalam campuran, rongga di antara mineral agregat, rongga terselimuti aspal, density dan bulk specific gravity. Pada penelitian ini digunakan agregat bergradasi rapat yang dicampur dengan aspal modifikasi pada suhu 155 oC dan dipadatkan 75 kali pada kedua sisinya. Pada seluruh benda uji, prosentase limbah styrofoam yang digunakan adalah 6% sedangkan getah pinus sebesar 0%, 1%, 2% dan 3% terhadap berat aspal modifikasi.  Hasil penelitian menunjukkan bahwa campuran laston yang menggunakan aspal modifikasi getah pinus menghasilkan nilai VFB, density dan bulk specific gravity lebih besar serta nilai VIM dan VMA lebih kecil dibandingkan dengan campuran yang menggunakan aspal modifikasi limbah styrofoam. Dengan nilai VIM dan VMA lebih kecil, campuran yang menggunakan aspal modifikasi getah pinus menghasilkan daya ikat lebih kuat sehingga memiliki durabilitas lebih tinggi. Ditinjau dari persyaratan laston sebagai lapis aus pada perkerasan jalan, penggunaan getah pinus dan limbah styrofoam sebagai modifier aspal memenuhi persyaratan volumetrik campuran. Volumetric properties of asphalt concrete is important factor to determine the durability of road pavement. Improvement the durability of road pavement and reducing negative impact of the environment can be done by using modified asphalt. This article aims to know the volumetric properties of  hot mix asphalt using pine resin and waste styrofoam as asphalt modifier. The volumetric properties include voids in mix, voids in the mineral aggregate, voids filled with bitumen, density and bulk specific gravity.  In this study, a continuously graded aggregate was used and mixed with modified asphalt at 155 oC and compacted with 75 blows on both sides. The percentage of waste styrofoam was 6% whereas the percentages of pine resin where  0%, 1%, 2% and 3% by weight of modified asphalt. From the analysis, it can be concluded that asphalt concrete containing pine resin as  modifier strengthen the binding between asphalt and agregate, due to increasing value of voids filled with bitumen (VFB), density and bulk specific gravity. Durability of asphalt concrete using pine resin as modifier was higher than that of asphalt concrete using waste styrofoam because of decreasing value of voids in mix (VIM) and voids in the mineral aggregate (VMA). Based on the specification of  asphalt concrete wearing course, the use of pine resin and waste styrofoam as asphalt modifier has fulfilled volumetric properties requirements.

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