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Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Papua Jalan Gunung Salju Amban, Manokwari 98314
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INDONESIA
Jurnal Natural
Published by Universitas Papua
ISSN : 14121328     EISSN : 2746427X     DOI : -
Core Subject : Science, Education, Agriculture,
Agriculture, Biological Sciences & Forestry Chemistry Mathematics Physics
Jurnal Natural merupakan jurnal ilmu-ilmu matematika dan pengetahuan alam (basic science) untuk bidang: matematika, kimia, statistika, biologi, dan fisika termasuk ilmu terapan yang terkait seperti bioteknologi, kimia pangan, keanekaragaman hayati, dan lain-lain.
Arjuna Subject : Umum - Umum
Articles 160 Documents
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PENDUGAAN KEBERADAAN AIR TANAH DENGAN DATA GEOLISTRIK DI KAMPUNG ANGGORI KABUPATEN MANOKWARI Ruth Grace Iriani Duwiri; Rosalina Rosina Mirino; Khristian Enggar Pamuji
Jurnal Natural Vol. 18 No. 2 (2022): Jurnal Natural
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v18i2.201

Abstract

Estimation of the presence and depth of groundwater is carried out using the Geoelectrical resistivity method with a dipole-dipole configuration consisting of 5 measuring lines. The results of the research are as follows on track 1 there is an aquifer with a depth of about 13-20 m and track 2 has an aquifer with a depth of about 25-50 m where both of these lines have an aquifer that flows to the Unipa Water Pump. Track 3 is interpreted to a depth of 50 m and the results cannot show the presence of groundwater with the lowest resistivity (????) value reaching 140 m. On track 4, the resistivity value (????) is 40 m and it is suspected that there is an aquifer with an estimated depth of >50 m. Track 4 has a stretch of 160 m so that geoelectrical data are interpreted to a depth of 50 m. Track 5 can be interpreted to a depth of 63 m and the interpretation results cannot indicate the presence of aquifers or groundwater.
STUDI EFEKTIVITAS PROSES FOTO FENTON DALAM MENURUNKAN ANGKA BAKTERI COLIFORM DI SUNGAI MARUNI KABUPATEN MANOKWARI Aulia Ekamala Wakang Wakang; Markus Heryanto Langsa; Jacson Victor Morin
Jurnal Natural Vol. 19 No. 1 (2023): Jurnal Natural
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v19i1.173

Abstract

Permasalahan air bersih masih menjadi hal yang banyak dijumpai di sebagian daerah, sehingga dibutuhkan suatu pengolahan air yang tepat. Foto fenton adalah salah satu metode pengolahan air dengan Advanced Oxidation Process (AOPs) antara reagen fenton (Fe2+/H2O2) dan radiasi sinar UV yang mampu mengurangi konsentrasi kontaminan dan membunuh mikroorganisme dalam air. Tujuan dari penelitian ini adalah untuk menentukan pengaruh daya iradiasi dan waktu penyinaran optimum dalam menurunkan angka bakteri Coliform dengan metode foto fenton di Sungai Maruni Kabupaten Manokwari yang terindikasi mengandung total Coliform melebihi kriteria mutu air. Dari hasil yang diperoleh menunjukkan bahwa setelah proses foto fenton, jumlah bakteri Coliform pada sampel mengalami penurunan secara drastis dari jumlah bakteri awal >1600/100 mL MPN menjadi 0/100 mL MPN (memenuhi kriteria mutu air sebesar 0/100 mL) dalam kondisi optimum yakni pada daya iradiasi 10 Watt dan waktu penyinaran selama 30 menit. Selain menurunnya jumlah bakteri Coliform, kadar Fe2+ pada sampel yang ditambahkan juga menurun sehingga tidak merusak kualitas air.
SKRINING FITOKIMIA DAN UJI TOKSISITAS EKSTRAK DAUN BUAH HITAM (Haplolobus cf. Monticola Husson) DENGAN METODE BRINE SHRIMP LETHALITY TEST (BSLT) AIsyah Ayu Indarsari; Evelina Somar; Sabir Sumarna
Jurnal Natural Vol. 19 No. 1 (2023): Jurnal Natural
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v19i1.176

Abstract

Indonesia is a country with the second highest terrestrial biodiversity wealth in the world. Some areas have endemic types of flora and fauna. One of the endemic flora found in Papua and widely found in Teluk Wondama district is piarawi or black fruit (Haplolobus cf. monticola Husson). The results showed that black fruit plants, both fruit and leaves, contain secondary metabolites that can cause pharmacological effects. The effectiveness of these active components as herbal medicines can be determined through a preliminary analysis in the form of a toxicity analysis. So far there has been no research on the content of secondary metabolites in the methanol extract of black fruit leaves. Thus, in this study, phytochemical and toxicity tests were carried out on the methanol extract of black fruit leaves (Haplolobus cf. monticola Husson) using the Brine Shrimp Lethality Test (BSLT) method. This test provides an overview of the toxicity level of black fruit leaf extract on Artemia salina Leach shrimp larvae. The test results can be used to identify bioative metabolites contained in black fruit leaves. Based on the results of the study, it can be concluded that the methanolic extract of black fruit leaves contains secondary metabolites such as alkaloids, flavonoids, saponins and tannins. Meanwhile, the results of the toxicity test showed that the LC50 value of the methanol extract of black fruit leaves was 102.5473779 ppm 102.53, so it could be categorized as moderately toxic.
KAJIAN TEORITIS RANCANGAN BILAH KINCIR ANGIN HORIZONTAL MODIFIKASI NACA 4412, 4415, 23012, DAN 23015 SEBAGAI PENGHASIL ENERGI ALTERNATIF DI MANOKWARI Rosalina Rosina Mirino; I Gede Deny Arsemaya Partadinova; Aries Astradhani Subgan
Jurnal Natural Vol. 18 No. 2 (2022): Jurnal Natural
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v18i2.200

Abstract

This research aims to produce a windmill blade design simulation using Airfoil NACA series 4412, 4415, 23012, 23015 and to determine the best type of windmill blade design based on the amount of power generated by the wind speed. The blade design was made using the Qblade v0.91b program based on the NACA 4412, 4415, 23012, and 23015 airfoils with taper and taperless types. Blade design begins with determining blade geometry and continues with blade design performance testing. Wind speed in Manokwari is classified based on the limit of the effective wind occurring in a day, which is 9 hours. The results showed that NACA 4412 and NACA 4415 were better than NACA 23012 and NACA 23015 with the efficiency of each blade reaching 49%. The NACA 4412 series taper produces an average total power per month of 168.38 KW and taperless of 196.93 KW from the average number of occurrences of potential wind speed of 9.35 m/s of 26 days. The NACA 4415 taper blade produces 164.8 KW of power while the taperless blade is 192.73 KW for the same average number of wind potentials. Based on the amount of power generated, the taperless type in the 4412 series is the best blade for wind speed in Manokwari.
Implementasi Program Dinamik dalam Optimisasi Biaya Persediaan Perusahaan : Implementasi Program Dinamik dalam Optimisasi Biaya Persediaan Perusahaan Bella Syahrani Nasution; Fibri Rakhmawati; Nenna Irsa Syahputri
Jurnal Natural Vol. 19 No. 1 (2023): Jurnal Natural
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v19i1.213

Abstract

This research is to reduce the total cost of the company’s inventory and minimize losses. Dynamic programming method is one of the methods used to manage inventory. Calculations using the dynamic programming method can be carried out by multiplying the product price per unit by the amount of production that has been forecast and converted to the inventory method and by multiplying the holding cost per unit of product by the amount of inventory at a certain time and then the two multiplications are added up. The advanced dynamic program is calculated from the first month to the last month. The dynamic program backwards is carried out from the end of the month to the beginning of the month. The research objective is to reduce the company’s total inventory costs of the dynamic program in the amount of Rp.n88,765,982,655 from January 2022 – August 2022.
Analisis Potensi Erosi Tanah Daerah Aliran Sungai Wosi, Manokwari, Papua Barat Menggunakan Teknologi Penginderaan Jauh Dan Sistem Informasi Geografis Hana Rumbiak; Abdul Muis Muslimin; Baina Afkril
Jurnal Natural Vol. 19 No. 1 (2023): Jurnal Natural
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v19i1.217

Abstract

Pengetahuan terkait area potensi erosi tanah sangat penting untuk keperluan mitigasi bencana. Penelitian ini bertujuan untuk menganalisis dan memetakan potensi erosi tanah di daerah aliran sungai (DAS) Wosi, Kabupaten Manokwari, Provinsi Papua Barat menggunakan model erosi E30. Luas DAS kajian tersebut adalah 13,2 km2. Tutupan lahan diperoleh dari analisis data citra landsat 8 OLI TIRS dan kemiringan lereng diperoleh dari analisis DEM SRTM. Kerapatan Vegetasi (NDVI) dianalisis menggunakan aplikasi ENVI 5.3 dan ArcGis 10.8. Hasil analisis NDVI menunjukkan bahwa kerapatan vegetasi DAS Wosi memiliki rentang nilai -0,241 hingga 0,77 dengan rata-rata 0,449 yang tergolong kerapatan vegetasi sangat tinggi. Hasil analisis kemiringan lereng memiliki enam kelas dengan kelas terendah 50 hingga 80 dan tertinggi >350 dengan rata-rata kemiringan 80 hingga 150 dengah tipe kelas agak curam. Hasil analisis potensi erosi tanah tahun 2020 Menunjukkan bahwa DAS Wosi memiliki tiga kelas potensi erosi yaitu: Sangat Ringan 0 hingga 15 mm / tahun (10,1 %), Ringan 15 hingga 60 mm / tahun (55,6%), Sedang 60 hingga 180 mm / tahun ( 34,3%).
The Identification of Rhizosphere Bacteria in Rumput Kebar from Kebar District, Tambrauw Regency: The Identification of Rhizosphere Bacteria in Kebar Grass from Kebar District, Tambrauw Regency Rina A Mogea; Maria Massora; Yeni Salosa; Nurul Muzizah; Dian Kristin; Nuari Rante Tondok; Nurul Endang Lestari; Daniela Ijie
Jurnal Natural Vol. 19 No. 1 (2023): Jurnal Natural
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v19i1.220

Abstract

The area in the soil occupied by the part of the plant roots that interacts with microbes is generally known as the rhizosphere. Rumput Kebar (Biophytum umbraculum Welw), is a shrub that can be found in Kebar, Tambrauw Regency, West Papua. By the local community kebar grass is widely used as a reproductive medicine. The aim of this study was to isolate and characterize rhizosphere bacteria on rumput kebar. The bacteria were isolated from the rhizosphere of rumput kebar by serial dilution then grown in NA media and incubated for 48 hours. The growth of colony and cell shape were observed and biochemical tests were carried out. From the observations made, there were 6 isolates obtained, namely isolate RK 1 was of the genus Agromyces, RK 2 was the genus Acetobacterium, isolates RK 3, 4 and 7 were of the genus Lactobacillus, isolate 5 was of the genus Amphibacillus and isolate RK 6 was of the genus Cellulomonas. All of these bacteria play a role in absorbing water and nutrients, accelerating growth, as biocontrol, N2 fixation, antibiosis and symbiosis.
Indonesia Sabarita Sinuraya
Jurnal Natural Vol. 19 No. 1 (2023): Jurnal Natural
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v19i1.225

Abstract

Penelitian ini bertujuan untuk menganalisis hubungan indeks Diatom dan parameter fisika dan kimia air dengan menggunakan Principal Component Analisis (PCA) di Sungai Prafi di Manokwari, Papua Barat menggunakan index diatom dan beberapa parameter fisika kimia air. Pengambilan sampel berdasarkan metode Purposive Random Sampling dan dilakukan pada awal musim panas. Pengambilan sampel diatom menggunakan kuas dan botol aqua 600ml yang ujungnya dilobangi diambil pada substrat atau diatom yang melayang di perairan seperti batuan, batang tanaman, atau daun lalu disaring dengan plankton net berukuran 406 pori-pori per inci dan diameter 12 cm pada 8 lokasi dan diulang 3 kali. Hasil TDI (Trophic Diatom Index) digolongkan kedalam dua kategori oligotrofik dan mesotrofik, untuk nilai PTV digolongkan kedalam kategori dua yaitu:TTO(Tidak Tercemar Organik), TPO (Terpengaruh Pencemaran Organik). Hasil penelitian parameter fisika dan kimia di semua lokasi penelitian sudah memenuhi standar baku mutu berdasarkan PP.no 82 tahun 2001 kelas I untuk pH, DO dan Nitrat dan kelas III untuk BOD5. Hasil analisis korelasi Index diatom (TD ,PTV dengan parameter fisika dan kimia air menggunakan PCA menunjukkan bahwa TDI berkorelasi tinggi terhadap suhu,pH dan nitrat, tetapi korelasi TDI terhadap BOD dan orthophosfat sedang .Hasil korelasi PTV dengan BOD dan orthophosfat tinggi sementara korelasi PTV dengan suhu, pH dan nitrat sedang.
PENILAIAN KEMATANGAN GONAD MELALUI USIA SPERMARKE ANAK LAKI-LAKI DI PERKOTAAN MANOKWARI PAPUA Elda Irma Jeanne Joice Kawulur; Andika Andika; Sita Ratnawati
Jurnal Natural Vol. 19 No. 1 (2023): Jurnal Natural
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v19i1.230

Abstract

The first time sperm production experienced by a man as an early sign of gonadal maturity (spermarche) is still considered taboo and violates ethics to be discussed in public. As a sign of sexual maturity, the age at spermarche varies among individu and population. This study aims to determine the age at spermarche of boys in urban area of ​​Manokwari West Papua Province. The method used in this research is cross sectional with interview technique. Data collection of age at spermarche is done using status quo method. The mean age at spermarche was analyzed using a generalized linear model (GLM) probit analysis. The average age at spermarche of boys in urban area of ​​Manokwari, West Papua Province was 12.83 years younger than the age at spermarche in rural areas of West Papua and western Indonesia. These characteristic reveals the response of plasticity in understanding the natural history of a population.
RANCANG BANGUN ALAT UKUR KETINGGIAN PERMUKAAN AIR SUNGAI MENGGUNAKAN SENSOR ULTRASONIK AJ-SR04M Yasir Abdan Syakur; Elohansen Padang; Baina Afkril
Jurnal Natural Vol. 19 No. 1 (2023): Jurnal Natural
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v19i1.231

Abstract

Monitoring of water levels provides many benefits in various fields of application such as flood disaster mitigation, irrigation management, and dam management. Research has been carried out on the design and testing of a river water level measuring instrument based on the AJ-SR04M ultrasonic sensor. This ultrasonic sensor has several advantages, including accurate measurement results, low costs, can be found easily on the market, simple, and waterproof making it suitable for river water level measurement applications. The developed measuring instrument is also equipped with temperature and humidity sensors as a correction factor for the speed of sound, because these two parameters affect the speed of sound. The Arduino Uno board is used as a signal processing unit in charge of processing all output signals from sensors. The micro SDcard module is used as a container for storing measurement data. Meanwhile, the LCD board is used to display the measurement results. The Arduino Uno board is programmed using the Arduino IDE software. The test results show that the instrument has a very good level of accuracy. This is evidenced by the results of testing the devices which showed a relative error of 0.066%. In addition, the tool also functions with very good precision where the correlation coefficient (R2) obtained from testing the instrument is 0.98.

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