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Jurnal Penelitian Sains

jps
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Published by Universitas Sriwijaya

ISSN : 14107058 EISSN : 25977059 DOI : 10.26554

Core Subject : Science, Education,

Chemistry Mathematics Physics

Jurnal Penelitian Sains (JPS) MIPA UNSRI merupakan wahana komunikasi ilmiah di bidang sains serta lintas ilmu yang terkait; diterbitkan sejak 1 Oktober 1996 oleh UP2M FMIPA Universitas Sriwijaya. Jurnal ini berisikan tulisan atau karangan ilmiah dalam berbagai bidang tersebut yang diangkat dari hasil penelitian, survei, atau telaah pustaka, yang belum pernah dipublikasikan dalam terbitan lain.

Arjuna Subject : -

Articles 743 Documents

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Pemanfaatan Ubi Jalar (Ipomoea Babatas, L.) Menjadi Sirup Glukosa Dengan Hidrolisis Asam Lukhi Mulia Shitophyta; Den S. B. Ardiansyah; Muhammad Rizky Nendanov
Jurnal Penelitian Sains Vol 22, No 1 (2020)
Publisher : Faculty of Mathtmatics and Natural Sciences

Ubi jalar (Ipomea Babatas, L.) merupakan tanaman umbi yang mengandung karbohidrat, kalsium dan pati. Selain dikonsumsi sebagai bahan pangan, ubi jalar jug bisa digunakan sebagai bahan baku pembuatan sirup glukosa. Penelitian ini bertujuan untuk mengkaji pengaruh waktu hidrolisis dan volume HCl terhadap produksi glukosa. Pati diekstrak dari ubi jalar kemudian diendapkan selama 1 jam. Produksi sirup glukosa dilakukan dengan metode hidrolisis asam pada suhu 100°C. Hasil penelitian menunjukkan kadar glukosa tertinggi sebesar 62,75% diperoleh pada waktu hidrolisis 30 menit dan volume 15 ml HCl. Kadar glukosa terendah dihasilkan pada waktu hidrolisis terlama. Semakin besar volume HCl, semakin kecil kadar glukosa yang diperoleh.

Isolasi dan aktivitas antibakteri jamur endofit pada mangrove Sonneratia alba dari Tanjung Carat Kabupaten Banyuasin Sumatera Selatan Anna Heirina; Rozirwan Rozirwan; Muhammad Hendri
Jurnal Penelitian Sains Vol 22, No 1 (2020)
Publisher : Faculty of Mathtmatics and Natural Sciences

S. alba is a mangrove that is commonly found on the east coast of Banyuasin. Endophytic fungus can produce a functional compound e.g antibacterial. The purpose of this study is to determine the type, the increase in diameter of colonies and the antibacterial potential in endophytic fungus of S. alba. The research method used were by the isolation of endophytic fungus from leaf, stem and root, the identification of endophytic fungus, the measurement of colony diameter in endophytic fungus and antibacterial activity test using paper disc method. The results of this study found the two genera of endophytic fungus with four species of Aspergillus sp1., Aspergillus sp2., Paecilomyces sp1., and Paecilomyces sp2. The increase in diameter for each colony of endophytic fungus shows the difference every day. Aspergillus sp1. The exponential phase has been visible on the third day with an average diameter increase of 33.70 mm / day. The exponential phase of Aspergillus sp2 was visible on the third day with an diameter increase of 37.74 mm/day. In the endothelium fungi Paecilomyces sp1, the exponential phase was visible on the third day to the seventh day with diameter increase of 13.57 mm/day to 38.07 mm/day. Exponential phase of Paecilomyces sp2. was visible on the third day to the sixth day with diameter increase of 25.25 mm/day to 75.21 mm/day. These four types of endophytic fungus are resistant to bacteria E. coli and S. aureus. Aspergillus sp2. endophytic fungus has the highest inhibitor potency of 14.49 mm in E. coli bacteria. The endophytic fungus Paecilomyces sp2. inhibits bacterial growth of S. aureus with the highest inhibitory potency of 11.61 mm.

Uji Aktivitas Antibakteri Kombinasi Ekstrak Etanol Daun Seledri (Apium graviolens L.) Dan Madu Hutan Terhadap Beberapa Bakteri Penyebab Penyakit Kulit Masayu Azizah; Lara Septy Lingga; Yopi Rikmasari
Jurnal Penelitian Sains Vol 22, No 1 (2020)
Publisher : Faculty of Mathtmatics and Natural Sciences

Telah dilakukan uji aktivitas antibakteri dari ekstrak etanol daun seledri (Apium graviolens L.) dan madu hutan terhadap bakteri penyebab penyakit kulit yaitu Staphylococcus aureus ATCC 25923, Streptococcus pyogenes ATCC 19615, Propionibacterium acnes ATCC 11827, Pseudomonas aeruginosa ATCC 27853, Sreptococcus β hemoliticus ATCC 19615. Ekstraksi dilakukan dengan cara maserasi menggunakan pelarut etanol destilat. pengujian aktivitas antibakteri dilakukan dengan menggunakan metode difusi agar dengan konsentrasi zat uji yaitu 70%:30%, 60%:40% dan 50%:50% dengan menggunakan etanol destilat sebagai kontrol negatif dan kloramfenikol sebagai kontrol positif. Hasil penelitian menunjukkan daya hambat ekstrak pada konsentrasi 70%:30% pada masing-masing bakteri uji yaitu Staphylococcus aureus ATCC 25923 sebesar 17 mm, Streptococcus pyogenes ATCC 19615 sebesar 18,6 mm, Propionibacterium acnes ATCC 11827 sebesar 17,9 mm, Pseudomonas aeruginosa ATCC 27853 sebesar 18,6 mm, Sreptococcus β hemoliticus ATCC 19615 sebesar 16,15 mm. hasil penelitian menunjukkan bahwa ekstrak etanol daun seledri dan madu hutan memiliki aktivitas antibakteri terhadap bakteri infeksi kulit dalam kategori kuat

Effects of Fiber Consumption in Lowering Cholesterol Level Brigitta Olivia Sinulingga
Jurnal Penelitian Sains Vol 22, No 1 (2020)
Publisher : Faculty of Mathtmatics and Natural Sciences

High cholesterol is one of the risk factor for non-communicable disease such as the formation of artherosclerosis and metabolic disease. The number of non-communicable disease continue to increase and becomes one of the health problems in the world including Indonesia. community eating habbit that changed for the worse with the times are one of the biggest reason why the number of deaths for non-communicable diseases continues to increase. there are efforts that can be made to prevent the condition of hypercholesterolemia, a state of disturbance of blood fat levels of more than 240 mg / dl is to modify the lifestyle with a high-fiber diet. There are so many health benefits that can be obtained from eating dietary fiber. In addition to lowering cholesterol, dietary fiber can also increase insulin sensitivity, stimulate reducing blood glucose diffusion, hormonal effects by decreasing insulin secretion, increasing fat oxidation, and reducing fat storage due to increased satiety. Therefore, the adequacy of food fiber intake in the daily diet is very important. According to Southgate daily fiber intake is 16-28 g / day. Whereas the Dietary Guidlenes of American recommend consuming foods containing fiber and starch in amounts of 20-35 g / day

Perbandingan Antioksidan Ekstrak Etanol Daun Gaharu (Aqularia malaccensis L.) dan Ketiga Fraksi Berbagai Pelarut (Heksan, Etil Asetat, dan Air) Mauizatul Hasanah Hasanah; Deby Apriyanti; Dewi Patmayuni
Jurnal Penelitian Sains Vol 22, No 1 (2020)
Publisher : Faculty of Mathtmatics and Natural Sciences

Telah dilakukan penelitian perbandingan antioksidan ekstrak etanol daun gaharu (Aquilaria malaccensis L.) dan ketiga fraksi-nya dari berbagai pelarut (heksan, etil asetat dan air). Ekstraksi dilakukan dengan metode maserasi terhadap 350 gram serbuk daun gaharu menggunakan pelarut etanol 70%, kemudian dilakukan fraksinasi terhadap ekstrak kental menggunakan pelarut heksan, etil asetat dan aquadest. Hasil ekstraksi diperoleh rendemen ekstrak kental 3,57 (%b/b), sedangkan hasil fraksinasi diperoleh fraksi heksan, etil asetat dan air berturut-turut adalah 43,14; 32,67; 22,20 (%b/b). Uji antioksidan dilakukan dengan metode DPPH (Difenilpikril hidrazil), dimana nilai penghambatan DPPH (% inhibisi) di uji pada berbagai konsentrasi larutan uji sampel, untuk ekstrak kental dilakukan pada konsentrasi 80; 60; 40; 20; 10 ppm, dan sampel fraksi pada konsentrasi 200; 160; 120; 80; 40 ppm. Intensitas aktivitas antioksidan sampel ditentukan dari nilai IC50, yang diperoleh dari persamaan garis lurus antara konsentrasi sampel uji dan % inhibisi. Hasil perhitungan IC50 menunjukkan aktivitas antioksidan yang tergolong sangat kuat pada ekstrak kental dan fraksi etil asetat yaitu 16,45 dan 47,69 ppm, dan antioksidan kuat terdapat pada fraksi N-heksan dan fraksi air yaitu 57,24 dan 76, 95 ppm.

Validasi Metode Pengujian Amonia Menggunakan Metode Uji Cepat Hanna HI 96733 Siti Nuraini; Hanida Yanti
Jurnal Penelitian Sains Vol 22, No 1 (2020)
Publisher : Faculty of Mathtmatics and Natural Sciences

Validation of ammonia testing methods using the Hanna HI 96733 rapid test method has been performed. Hanna HI 96733 rapid test method has advantages that cost more economical because using only 2 reagents and more practical, the number of sample volume used relatively little so that the waste produced is also less, the analysis is easier and faster. The validation parameters that are performed are test linearity, Method Detection Level (MDL), precision test and accuracy test, so that the method can be known is valid or not. Ammonia testing with HI 96733 has linearity (r) 0.9993 for concentration range 5 – 50 ppm, MDL of 0.4752 ppm, precision of 5.2505% and accuracy of 100.48%. The rapid test method of Hanna HI 96733 can be used as a method of testing ammonia in LPT FMIPA because it meets all the acceptance limits.

Pengaruh Pemberian Variasi Gula Pasir Pada Minuman Daun Pegagan (Centella asiatica (L.) Urban) Terhadap Organoleptik dan Kadar β-Karoten Vitri Agustiarini; Fauziyah Fauziyah; Dina Permata Wijaya
Jurnal Penelitian Sains Vol 22, No 3 (2020)
Publisher : Faculty of Mathtmatics and Natural Sciences

Pegagan (Centella asiatica (L.) Urban) is a plant that contains compounds that can protect the body from free radicals. Pegagan leaves contain β-carotene. The purpose of this study was to determine the effect of giving variations of sugar in the drink Pegagan (Centella asiatica (L.) Urban) on organoleptic and β-carotene levelsThis study used an experimental method using a completely randomized design (CRD) with two factors, factor 1, namely the weight of pegagan leaves (P1 = 50 grams and P2 = 70 grams) and factor 2, namely sugar (G1 = 50 grams, and G2 = 100 grams). ) with 4 treatments and 2 repetitions. The results showed that the weight of pegagan leaves and sugar had an effect on the β-carotene content of pegagan leaf drink. The highest β-carotene content of pegagan leaf drink was treated with 70 grams of pegagan leaves and 100 grams of sugar (P2G2) which was 540.60 μg. The lowest β-carotene content of pegagan leaf drink in the treatment of pegagan leaves was 50 grams and sugar 50 grams (P1G1) was 216.97 μg. The organoleptic results of pegagan leaf drink were green, had a less distinctive aroma and pegagan leaf drink which was most preferred by panelists in the treatment of P1G1 (50 grams of pegagan leaves and 50 grams of sugar), P1G2 (50 grams of pegagan leaves and 100 grams of sugar) and P2G2 (leaves pegagan 70 grams and 100 grams of sugar).Keywords: pegagan, β-carotene, organoleptic

Pengaruh Berat Resin dan konsentrasi Eluen Terhadap Prekonsentrasi Logam Pb Menggunakan Resin DOWEX 50WX2-200 Dengan Metode SSA di Laboratorium Pengujian Terpadu FMIPA Universitas Sriwijaya Siti Nuraini Nuraini; Hanida Yanti
Jurnal Penelitian Sains Vol 23, No 2 (2021)
Publisher : Faculty of Mathtmatics and Natural Sciences

Penelitian tentang prekonsentrasi logam Pb menggunakan resin DOWEX 50WX2-200 dengan metode SSA telah dilakukan. Teknik prekonsentrasi ini dilakukan dengan cara sampel air dimasukkan ke dalam kolom, dielusi dengan HNO3 1 M, kemudian diukur dengan spektrofotometer serapan atom (SSA). Beberapa parameter penting pada teknik prekonsentrasi ini telah dipelajari. Dari hasil penelitian diperoleh kondisi optimum untuk prekonsentrasi logam Pb yaitu pada berat resin 0,5 gram, volume eluen 10 mL, konsentrasi eluen 1 M dan volume sampel air keran 50 ml. Metode prekonsentrasi logam Pb dengan resin Dowex 50WX2 bisa menjadi metode alternatif sebagai pengembangan metode prekonsentrasi untuk analisis cemaran logam Pb di dalam air dalam kadar yang sangat rendah. Metode ini diaplikasikan untuk analisis logam Pb pada sampel air keran dengan nilai perolehan kembali sebesar 90 %.

Optimasi kondisi pengujian senyawa Flavonoid Total di dalam ekstrak tanaman sebagai pengayaan bahan ajar praktikum Makromolekul dan Hasil Alam di Laboratorium Kimia Organik Lusi Suwartini; Nopri Yanti; Winta Efrinalia
Jurnal Penelitian Sains Vol 23, No 1 (2021)
Publisher : Faculty of Mathtmatics and Natural Sciences

Makromolekul dan Hasil Alam merupakan salah satu praktikum yang dilayani UPT.Laboratorium Terpadu dan merupakan praktikum yang baru, sehingga untuk memenuhi tujuan pembelajaran perlu dilakukan uji coba objek praktikum yang sesuai. Tujuan penelitian ini adalah untuk mendapatkan kondisi yang memungkinkan dari pengujian senyawa flavonoid total agar dapat digunakan sebagai objek praktikum yang efektif dan efisien. Pada penelitian ini dilakukan optimasi kondisi pengujian senyawa flavonoid total dalam ekstrak daun katuk, pandan dan mengkudu dengan metode spectrofotometri yang menggunakan pereaksi AlCl3. Adapun parameter yang digunakan adalah pengaruh volume dan konsentrasi AlCl3, CH3COONa, waktu reduksi dan berat sampel terhadap kestabilan warna senyawa kompleks AlCl3. Dari hasil penelitian ini diperoleh kondisi optimum AlCl3dengan volume 0,1 mLkonsentrasi 5%, dan CH3COONa 0,2 mL konsentrasi 1M. Sedangkan waktu reduksi optimum adalah 45 menit, dan berat optimum ekstrak daun berkisar antara 50 mg-700 mg.

Identifikasi Borneo Vortex Terhadap Dinamika Suhu Permukaan Laut di Laut Jawa Yosafat Donni Haryanto; Shanas Septy Prayuda; Rezfiko Agdialta; Nelly Florida Riama; Agus Hartoko; Sutrisno Anggoro; Muhammad Zainuri
Jurnal Penelitian Sains Vol 22, No 3 (2020)
Publisher : Faculty of Mathtmatics and Natural Sciences

The event of Borneo Vortex is a disruption of the synoptic scale that occurs when the Asian monsoon is active. Borneo Vortex occurs because of the interaction of the Asian monsoon winds with the wind from the southeast in the northwest region of Borneo so that the vortex is formed which can increase rainfall. Related with rainfall, Sea Surface Temperature (SST) becomes one of the factors that influence it. The purpose of this study is to examine the effect of Borneo Vortex on the dynamics of Sea Surface Temperatures in the Java Sea. The impact of Borneo Vortex, SST parameter becomes dynamic and very important to influence the condition of waters in Java Sea. Data used in this research is ERA Interim ECMWF (European Center for Medium-Range Weather Forecast) Reanalysis data in the form of wind component u and v, vortisitas relative, divergence, and specific humidity. Rainfall analysis is done using daily rainfall data of 3B42RT TRMM (Tropical Rainfall Measuring Mission), while SST data uses the data of Visualize NOAA (National Oceanic and Atmospheric Administration) High Resolution Blended Analysis Data. The Sea Surface Temperature analysis was performed using Remote Sensing data from the period of December until February (DJF) 2004/05 to 2014/15. The method used is to find the composite value of each parameter at the time of Borneo Vortex event during the time of research. The results identify that the largest event of Borneo Vortex was in December. With the presence of Borneo Vortex, there is a significant change in vorticity, divergence, moisture transport, rainfall, and SST. The impact of Borneo Vortex can increase rainfall and increase SST in the Java Sea. Borneo Vortex occurred in December January February at the time of an active Asian monsoon in northwest Borneo where there is a synoptic scale disorder in the form of a massive air vortex causing an increase in rainfall and the dynamics of SST tend to rise as well.Keywords: Borneo Vortex, Java Sea, Sea Surface Temperature.

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Home Page

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Contact Name Hadi

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Phone +6282374210479

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Editorial Address Fakultas Matematika dan Ilmu Pengetahuan Alam Jl. Palembang-Prabumulih Km. 32 Inderalaya Ogan Ilir

Location Kab. ogan ilir, Sumatera selatan INDONESIA

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Contact Name
Hadi

Contact Email
jpsmipaunsri@mipa.unsri.ac.id

Phone
+6282374210479

Journal Mail Official
jpsmipaunsri@mipa.unsri.ac.id

Editorial Address
Fakultas Matematika dan Ilmu Pengetahuan Alam Jl. Palembang-Prabumulih Km. 32 Inderalaya Ogan Ilir

Location
Kab. ogan ilir,

Sumatera selatan

INDONESIA