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Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam
Published by Universitas PGRI Palembang
ISSN : 1829586X     EISSN : 25810170     DOI : -
Core Subject : Science, Education, Agriculture,
Agriculture, Biological Sciences & Forestry Chemistry Mathematics Physics
Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam with registered number ISSN 1829 586X (print) and ISSN 2581-0170 (online) is a scientific journal managed and published by Faculty of Mathematics and Natural Science, Universitas PGRI Palembang. Sainmatika Journal publishes research articles from laboratory or field experiment as well as theoretical and elaborative research in field of Basic Sciences; Mathematics, Chemistry, Physics and Biology. This journal accepts articles in Indonesian or English. This journal is published twice a year in June and December.
Arjuna Subject : -
Articles 499 Documents
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Pemanfaatan Limbah Minyak Goreng Dari Hasil Kuliner Pecel Lele Menjadi Biodiesel Indah Sukria; Andi Arif Setiawan; Rahmawati Rahmawati; Muhammad Hapiz Hermansyah
Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Vol. 19 No. 2 (2022): Sainmatika : Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/sainmatika.v19i2.9216

Abstract

The activity of making biodiesel from waste oil from pecel catfish is useful for reducing environmental pollution due to waste disposal, and reducing damage to the human body due to repeated consumption of oil. This study aims to analyze the quality of biodiesel from waste oil using a NaOH catalyst and with different variations of methanol content of 75%, 80%, 85% and 95%. The method used is an experiment in the laboratory. The addition of methanol with different levels of variation was measured for viscosity, density, moisture content and flash point with three repetitions. The results of these measurements indicate that the use of methanol with a level of 95% that meets the SNI standard with the results of an average viscosity of 5.1 cSt, an average density of 0.87 g/cm3, water content shows an average of 0.37% and average flash point 3500C.
Perbedaan Hasil Derajat Aglutinasi Serum Grouping Tube Test Dengan Suspensi Reagen NaCl 0,9% Siap Pakai dan Suspensi Reagen NaCl 0,9% Dari Garam Dapur Hani Ammariah; Nurhidayanti Nurhidayanti; Bastian Bastian; Trimin Kartika
Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Vol. 19 No. 2 (2022): Sainmatika : Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/sainmatika.v19i2.9500

Abstract

ABO blood group examination is a simple laboratory test performed to determine a person’s blood group. There are two types of ABO blood group test, namely cell grouping and serum grouping. Serum grouping examination is very important to prevent incompatible transfusion reactions and organ transplant rejection. Serum grouping was carried out using 10% saline wash suspension of cell A, B and O. The blood cell washing stage was used to remove fragile cells and interfering substances that could result in errors in the examination. The main ingredient used in the blood cell washing procedur is 0.9% NaCl. This study aims to determine the degree of agglutination serum grouping tube test with ready to use 0.9% NaCl reagent suspension and 0.9% NaCl reagent suspension from table salt. The type of research is an experiment. The study was conducted at UDD PMI South Sumatra Province on 30 December 2021 to 5 January 2022 with a totalsample of 67 samples. The results showed that the average degree of agglutination the serum grouping tube test with 0.9% NaCl reagent ready to use was 3.73 and the average degree of agglutination the serum grouping tube test with0.9% NaCl reagent from table salt was 3.69. Wilcoxon test results obtained p value = 0.450. The conclusion of the study, that there is no differences in the results of the agglutination serum grouping tube test with ready to use 0.9% NaCl reagen suspension and 0.9% NaCl reagent suspension from table salt. The table salt showed that 0.9% NaCl reagent can be used as alternative reagent NaCl 0.9% ready to use in the examination of Iserum grouping tube test.
Pengukuran Tingkat Kebisingan Lalu Lintas Di Jalan Sukarela Kota Palembang Sumatera Selatan Atina Atina; Duwi Puspita Sari; Dian Mutiara; Dewi Novianti
Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Vol. 19 No. 2 (2022): Sainmatika : Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/sainmatika.v19i2.6977

Abstract

Tujuan penelitian ini adalah mengetahui tingkat kebisingan yang disebabkan oleh kendaraan bermotor di Jalan Sukarela Kota Palembang Sumatera Selatan dan Membandingkan tingkat kebisingan dengan Nilai Ambang Batas (NAB) kebisingan. Metode yang diterapkan dalam penelitian ini adalah dengan pengukuran langsung di lapangan menggunakan Sound Level Meter. Pengukuran dilakukan pada satu titik yang sama selama tiga hari yaitu pada waktu pagi, siang, dan sore hari. Hasil pengukuran menunjukkan bahwa tingkat kebisingan di area ini pada pagi hari yaitu 73,38 dB(A), 74,87 dB(A), dan 69,70 dB(A). Tingkat kebisingan pada siang hari yaitu 69,48 dB(A) 69,16 dB(A), dan 70,78 dB(A). Sedangkan hasil pengukuran pada sore hari yaitu 69,70 dB(A), 69,03 dB(A), dan 70,73 dB(A). Dengan demikian disimpulkan bahwa lokasi pengukuran tingkat kebisingan di Jalan Sukarela Kota Palembang Sumatera Selatan berada di atas Nilai Ambang Batas Kebisingan (NAB) yang ditetapkan pemerintah sesuai peraturan menteri lingkungan hidup no 48 tahun 1996 yaitu 65 dB(A).
Efektivitas Anti Jamur Perasan Daun Sirih (Piper betle L.) Terhadap Daya Tetas Telur dan Kelangsungan Hidup Larva Ikan Gurami (Osphronemus gouramy) Nopri Susilo; Indah Anggraini Yusanti
Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Vol. 19 No. 2 (2022): Sainmatika : Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/sainmatika.v19i2.9308

Abstract

Produksi budidaya ikan gurami membutuhkan benih yang berkualitas dan ketersediaan benih yang kontinyu, namun kendala yang dihadapi adalah mortalitas dalam penetasan telur dan kelangsungan hidup yang disebabkan oleh jamur Saprolegnia sp yang menyerang telur-telur ikan, sehingga perlu dikendalikan dengan tindakan pencegahan. Daun sirih (Piper betle. L.) merupakan salah satu bahan alami yang dapat dijadikan alternatif karena mengandung minyak atsiri yang merupakan antibakteri dan antifungi. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh lama waktu perendaman telur dalam perasan daun sirih terhadap daya tetas telur, kelangsungan hidup larva ikan gurami (Osphronemus gouramy), tingkat serangan jamur Saprolegnia sp, serta waktu terbaik perendaman telur dalam perasan daun sirih. Hasil dari penelitian ini adalah waktu terbaik untuk daya tetas telur dan kelangsungan hidup larva ikan gurami yaitu dengan perendaman perasan daun sirih adalah selama 20 menit (perlakuan P3). Nilai daya tetas telur tertinggi diperoleh pada perlakuan P3 sebanyak 89.33%, tingkat serangan jamur Saprolegnia sp. terendah yaitu perlakuan P5 sebanyak 3,33% dan untuk kelangsungan hidup larva tertinggi yaitu perlakuan P3 sebanyak 84,00%.
Eksplorasi Tumbuhan Obat Berpotensi Imunomodulator Di Kecamatan Leihitu Kabupaten Maluku Tengah Sarmawaty Kotala; Tri Santi Kurnia
Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Vol. 19 No. 2 (2022): Sainmatika : Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/sainmatika.v19i2.9508

Abstract

ABSTRACTImmunomodulatory is a drug or a substance that can modulate the activity and function of the immune system. If you take drugs that are immunomodulators, they can improve the work of the immune system in the human body, so that they are not easily attacked by infectious diseases. In general, the use of immunomodulatory drugs is in the form of synthetic or chemical drugs. However, it can cause side effects if used in the long term, such as indigestion, headache, fever, skin rash, constipation, and increase uric acid levels. Therefore, one of the solutions is by applying medicinal plants like was done by people in Leihitu District, Maluku Tengah. However, the existence of the plants has not recorded yet. Therefore, it needs a further action to inform larger people. The method of the research was through exploration by doing some techniques, such as, survey, interview to the chief of the village and people who knowing medical plants, and documentation as well as identification by using some relevant references. The results presents there are 46 plant species and belonging to 27 families, medicinal plants with immunomodulatory potential. Plant parts used as immunomodulatory herbal medicines are roots, stems, leaves, fruits, seeds, rhizomes, and tubers.
Geographically Weighted Regression dalam Menganalisis Faktor-Faktor yang Mempengaruhi Kasus Tuberkulosis di Sumatera Utara Vera Maya Santi; Afifah Nur Mutia; Qorry Meidianingsih
Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Vol. 19 No. 2 (2022): Sainmatika : Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/sainmatika.v19i2.9020

Abstract

Geographically Weighted Regression (GWR) is a method used to analyze a case by considering spatial effects. Spatial effects indicate differences in environmental characteristics between regions. A spatial effect can be seen from the violation of the assumption of the multiple linear regression homoscedasticity test. Research in the health sector often shows that the spread of disease, especially infectious diseases, is influenced by spatial effects, one of which is tuberculosis. In 2020, North Sumatra will become one of the areas with high tuberculosis cases, so it is necessary to study tuberculosis cases and determine the factors that influence it by involving spatial effects. This study aims to model tuberculosis cases and analyze the ten factors thought to influence it using the GWR method with the adaptive kernel bi-square weighting function. The results showed that 23 regencies/cities had local GWR models and different factors influencing tuberculosis cases for each region, and ten other regencies/cities were influenced by other factors outside the variables studied. Based on the variables that affect it, 13 regional groups are formed. Modeling with the GWR method can explain tuberculosis cases in North Sumatra by 99.4%, and other predictor variables influence the rest.
Padat Populasi Wereng Batang Coklat (Nilaparvata lugens) dan Wereng Hijau (Nephotettix virescens ) pada Tanaman Padi Varietas Inpara 2 di Kampung Bokem Kabupaten Merauke Papua Jefri Ando Sembiring; Johanna A Mendes
Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Vol. 19 No. 2 (2022): Sainmatika : Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/sainmatika.v19i2.9321

Abstract

The purpose of this study was to analyze the population density and intensity of attack of Brown Planthopper (Nilaparvata lugens Stall) and green leafhoppers (Nephotettix virescens) on rice plants of Inpara 2 variety in Bokem Village. The research was conducted from August to October 2022 in the rice fields of Bokem Village, Merauke District. Sampling was carried out on three rice fields with an area of 20 x 40 m divided by five observation sub-plots spread diagonally with a size of 2 x 2 meters. Plant height of Inpara 2 variety at the age of 14 DAP (23.1 cm), 28 DAP (33.2 cm), 42 DAP (53.8 cm), 56 DAP (64 cm) and 70 DAP (70.2 cm) . The number of tillers at the age of 14 days old (3.2 tillers), 28 days old (5.5 tillers), 42 days old (11 tillers) and 56 days old (12.1 tillers). The panicle length of the Inpara 2 rice variety was on average (21.1 cm) while the weight of 1000 grains was 14.7 grams. Brown planthopper population at the age of 14 days after planting (0.19 individuals), 28 days after birth (0.07 individuals), 42 days after birth (0.19 individuals) and 56 days after planting (0.31 individuals) while the green leafhopper population at 14 days old (0.30 individuals) 32 individuals), 28 days old (0.33 individuals), 42 days old (0.25 individuals) and 56 days old (0.01 individuals). Keywords: Pest, Inpara 2, Population,  Brown planthopper, green leafhoppers
Pemanfaatan Elektrolit Air Laut Sebagai Sumber Energi Listrik Baterai Dengan Elektroda Tembaga - Aluminium Zuffa Anisa; Dyah Setyaningrum
Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Vol. 19 No. 2 (2022): Sainmatika : Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/sainmatika.v19i2.9583

Abstract

Electrical energy demand is increasing from time to time. Most sources of electrical energy come from petroleum, natural gas, and coal. Even though this energy source is non-renewable, the amount is dwindling, and it produces carbon emissions that can cause the greenhouse effect. Indonesia is an agrarian country whose territory is more than seventy percent of the ocean. Natural resources: seawater and beach sand are certainly very abundant. In this study, this natural material is used by researchers as a source of electrical energy in the form of a battery. As far as researchers know, research on the manufacture of battery cells by direct use of natural resources does not yet exist. Much is preliminary research on the extraction of basic materials so almost all research on batteries costs a lot of money by methods that are not simple. Therefore, this research is very important, because it uses a simple assembly method which is certainly time-saving and cost-effective. The battery array made consists of [Cathode || Electrolyte + Microporous Separator || anode]. The seawater-salt water battery cells made successfully turn on the lights, both LED lamps, and home light bulbs, with a large current generated of 13.56mA. The voltage produced by a battery cell is 1.31 V, while the series voltage for 2-3 batteries is 2.55 V and 3.6 V, respectively.
Pemanfaatan Limbah Kulit Pisang Raja Nangka sebagai Capping Agent Sintesis Partikel ZnO: Variasi Pelarut Ekstraksi Nuril Mega Musfita; Fauziatul Fajaroh; Adilah Aliyatulmuna; Endang Ciptawati; Yahmin Yahmin; Nazriati Nazriati
Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Vol. 19 No. 2 (2022): Sainmatika : Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/sainmatika.v19i2.9135

Abstract

Kemunculan bakteri resisten antibiotik menjadi masalah serius di seluruh dunia. Upaya penanggulangan bakteri resisten antibiotik terus dilakukan, salah satunya dengan penggunaan material berukuran nano. Zink oksida (ZnO) merupakan salah satu partikel yang telah terbukti dapat menghambat pertumbuhan bakteri gram negatif dan gram positif. Dalam mencegah terjadinya aglomerasi pada sintesis ZnO berukuran nanometer dapat ditambahkan capping agent alami berupa senyawa metabolit sekunder pada ekstrak kulit pisang raja nangka. Adapun langkah yang dilakukan adalah: 1) ekstraksi metabolit sekunder kulit pisang raja nangka, 2) uji fitokimia, 3) penentuan kadar total flavonoid dan polifenol, 4) sintesis ZnO dengan capping agent alami ekstrak kulit pisang raja nangka, 5) karakterisasi ZnO, dan 6) uji aktivitas antibakteri ZnO. Hasil analisis kualitatif melalui uji fitokimia serta analisis kuantitatif melalui penentuan kadar total polifenol dan flavonoid menunjukkan bahwa ekstrak kulit pisang raja nangka etanol (96%)-air 2:1 (v/v) memiliki kadar metabolit sekunder yang lebih tinggi dibandingkan ekstrak kulit pisang raja nangka etanol (96%)-air 1:1 (v/v). Partikel ZnO berhasil disintesis menggunakan capping agent alami ekstrak kulit pisang raja nangka. Kadar metabolit sekunder yang berbeda pada masing-masing ekstrak mempengaruhi ukuran, morfologi, dan aktivitas antibakteri ZnO hasil sintesis.
Intervention Analysis for Modeling and Forecasting Exchange Rates Rupiah Against Yen Anjuita Anjuita; Widyanti Rahayu; Dania Siregar
Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Vol. 20 No. 1 (2023): Sainmatika : Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/sainmatika.v20i1.9209

Abstract

The Rupiah exchange rate against the Yen is one of the most important exchange rates in Indonesia since the agreement between the two countries to conduct investment and trade transactions using local currency. Exchange rate movements tended to strengthen during 2019. In 2020 there was a COVID-19 intervention and there was a significant weakening. An intervention is an event that causes a sharp increase or decrease in time series data. Intervention analysis is an analysis used on the data affected by the intervention by measuring the magnitude of the change in value and the duration of the intervention. Intervention analysis research on data on the rupiah exchange rate against the yen is still very rarely done. This study aims to apply intervention analysis in modeling and forecasting the Rupiah against the Yen exchange rate by considering the impact of the COVID-19 intervention. Research shows that the COVID-19 intervention on the Rupiah exchange rate against the Yen has had a long impact with the best intervention model being ARIMA (4,2,0) with an order of intervention (0,1,0). The level of forecasting accuracy using the model is very good with a MAPE value of 2.69%.

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