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Abdul Muis Muslimin
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Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Papua Jalan Gunung Salju Amban, Manokwari 98314
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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 14 Documents
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Search results for , issue "Vol. 18 No. 2 (2022): Jurnal Natural" : 14 Documents clear
Potential of Carbon-Chitosan Composite as Biosorbent of Heavy Metal Cu(II) Bertha Mangallo
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.v18i2.181

Abstract

This research focuses on adsorption technology from natural sources (biosorbents), esspecially optimizing the potential of composites chitosan as biosorbents for heavy metal waste . The target to be achieved from this research is to obtain the technology of synthesis carbon-chitosan composites for adsorption Cu(II) metal. The study of the characteristics of the chitosan composite with FT-IR, while the adsorption capacity was determined by AAS. The research stages include the isolation of chitin from shrimp shells, deasetilation of chitin into chitosan, the synthesis of charcoal from palm shell, the synthesis of the carbon–chitosan composite (KCK), and the characterization and study adsorption of the chitosan composite on Cu(II) metal. The results of the analysis of the adsorption capacity of chitosan composites showed that formulation of Carbon-Chitosan (KCK) which gave the greatest adsorption toward Cu(II) metal was at a ratio of 1:10 (w/v), which was 2.3037 x 10-4 mol/ g.
EVALUASI PENGARUH LAJU ALIR POMPA INJEKSI TERHADAP TEKANAN POMPA INJEKSI PADA STASIUN PENGUMPUL UTAMA B JATIBARANG FIELD Fifi Izzati; Riska Laksmita Sari Riska Laksmita Sari; Adhy Rahutomo Saptandro
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.v18i2.182

Abstract

After a certain period of time, the reservoir's pressure will drop to the point where petroleum can no longer flow naturally. Because of the decrease in oil production, a well will no longer have economic value. Artificial lifts or specific methods are used in wells to help oil flow to the surface in order to maintain or increase petroleum recovery. Water injection is a method of increasing oil recovery by injecting water into the well. Water injected into this well will increase pressure to the oil in the reservoir, causing it to be pushed and flow to the surface. Water treatment is typically performed at a Water Treatment Injection Plant (WTIP). WTIP performance is an activity that is used to keep reservoir pressure constant. The separation of the water that is lifted with the oil is the first step in the WTIP process. The Jatibarang Field fluid is collected at the SPU (Main Collector Station). Water from various wells will be collected at the SPU A, SPU B, SPU-Cemara, and Balongan terminals. At WTIP SPU B, the injection pump flow rate and injection pressure have a linear or directly proportional relationship. This is because as the injection pump flow rate increases, the amount of water injected increases, causing the pressure to increase. The flow rate is influenced by the amount of water received at SPU B, the condition of the pump, and the line connecting the SPU and WTIP.
Kelarutan dan Swelling Power Mikrokapsul β-Karoten Terenkapsulasi dalam Matriks Pati-Kitosan Terikat Silang Ion Tripolifosfat Agnes Dyah Novitasari Lestari
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.v18i2.184

Abstract

In this study, microencapsulation of β-carotene was carried out in a mixed matrix of starch and chitosan with the addition of tripolyphosphate ions as a crosslinker (denoted as starch-chitosan/TPP). Two types of starch were used here, namely native and hydrolyzed starch. Hydrolyzed starch was prepared by acid hydrolysis using 2 M HCl. Microcapsules were synthesized by adding dropwise dispersion of β-carotene in ethanol to the aqueous mixture of starch-chitosan/TPP matrix accompanied by magnetic stirring and heating at 90ºC. The synthesized microcapsules were then tested for solubility and swelling power in aqueous media. The results showed that the solubility and swelling behavior of microcapsules were influenced by the characteristics of the constituent starch. The solubility of hydrolyzed starch-chitosan/TPP was greater than that of the native starch-chitosan/TPP. The native starch-chitosan/TPP microcapsules had a higher swelling power value than the hydrolyzed starch-chitosan/TPP.
PROYEKSI PERTUMBUHAN PENDUDUK KABUPATEN PEGUNUNGAN ARFAK MENGGUNAKAN MODEL LOGISTIK Kukuh Silvia Dwi Anggraeni; Tri Widjajanti Widjajanti; Rium Hilum Rium Hilum
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.v18i2.186

Abstract

Arfak Mountains Regency is an expansion area of Manokwari Regency which was formed based on the law of the Republic of Indonesia Number 24 of 2012 concerning the expansion of Arfak Mountain Regency in West Papua Province. The population growth of the Arfak Mountains Regency which has increased after the expansion can cause social problem in the area. social problems arising from the increase in population can be anticipated by using population growth projection. The purpose of this paper is to determine the logistic model and project population growth in the Arfak Mountains Regency. The results of this study are the mathematical model of population growth in the Arfak Mountains Regency using the logistic model is: The projected population growth of Arfak Mountains Regency in 2030 is people with an intrinsic growth rate of which is .
Antidiabetic Activity of Methanol Extract of Bark of Alstonia scholaris from Papua Nitya Praptiwi Nitya Praptiwi; Bertha Mangallo
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.v18i2.187

Abstract

One of the biological wealth that grows in Papua is Alstonia scholaris, known by the Maybrat tribe as the swe plant and is used as a traditional medicine for antidiabetic. The Swe tree contains a lot of white sap and tastes very bitter. There is also a bitter taste in the roots, bark, and leaves so it is thought to contain a lot of bioactive compounds of alkaloids which have the potential as antidiabetic. This study aims to extract and determine of antidiabetic activity by the inhibition activity of the α-glucosidase of methanol extract of bark of Alstonia scholaris from Papua as a basis for the development of antidiabetic drugs based on local resources. The method used was extraction by maceration, phytochemical screening test, inhibition activity of the α-glucosidase test and functional group analysis using FTIR. The results of phytochemical screening showed that methanol extract of bark of Alstonia scholaris from Papua was strongly positive containing secondary metabolites of alkaloids and flavonoids. Analysis of functional groups with FTIR showed that the secondary metabolite compound was thought to contain -OH functional group, C=C stretch and C=O group. IC50 value of Alstonia scholaris bark MeOH extract showed 0.97 µg/mL for α-glucosidase inhibition. This study suggest the methanol extract of bark of Alstonia scholaris might be considered as potential source of bio active constituents with excellent antidiabetic activity.
MAPPING MICRO AND SMALL INDUSTRY BASED ON RAW MATERIALS AND BUSINESS UNIT IN MERAUKE REGENCY WITH BIPLOT ANALYSYS La Fajrin La Fajrin; Indah Ratih Anggriyani; Dariani Matualage; Fitryanti Pakiding
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.v18i2.189

Abstract

In the 2015-2035 national industrial development master plan, it is stated that micro and small industries are one of the contributors to the national economy. This means that the even distribution of industrial and regional development according to the potential of natural resources in each region is the main target. Merauke regency has the second largest number of micro and small industries in Papua Province. Business development in this industry was found to be difficult. Raw materials are one of the supporting factors in developing the micro and small industries business. The availability of sufficient and sustainable raw materials will facilitate production. The number of available business units also affects the absorption of labor. Increased employment can reduce unemployment and poverty rates. Information on the potential of raw materials and business units can be used as the basis for consideration of decisions, policies and efforts to increase the distribution of development and industrial estates according to the potential of natural resources. Biplot analysis was used in this study to map the potential raw materials for each district. This analysis describes summary table data in a two-dimensional graph, which is based on singular value decomposition. The results show that the first is the availability of raw materials for food crops which is high in the district of Jagebob, Kurik, Muting, Semangga and Ulilin. Animha and Naunkenjerai districts have high availability of raw materials for fishery commodities. The highest raw material for agricultural commodities is found in the Merauke district. Second is the number of business units for livestock and plant commodities, which is quite high in the Merauke district. The number of business unit for plantation commodities and services is quite high in the Kurik district. The number of service business unit is mostly found in Malind district. The resulting feasibility measure is 0.804 raw materials and 0.765 business units.
Studi Kelayakan Lokasi Tempat Pembuangan Akhir (TPA) Sampah Di Distrik Oransbari Kabupaten Manokwari Selatan Berdasarkan Bebarapa Parameter Fisik Ika Indrieaswati Ika Indrieaswati; 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.v18i2.191

Abstract

This study was aimed to determine the feasibility level of the final disposal site (TPA) based on physical aspects in the Oransbari District according to SNI 19-3241-1994 and SNI 03-3241-1994. The method used is descriptive with field observation techniques. Measurement starts from the groundwater level using geoelectric mapping: Types of rock and distance to faults based on geological maps: slope, distance to rivers, distance to shoreline, and distance to airports based on topographic maps; rainfall data from BMKG; flooded and protected areas. Based on the results of the analysis of 10 physical parameters with the accumulated assessment (scoring) that has been done that the candidate for the location of the Final Disposal Site (TPA) is in the second interval class, with a score of 161, so that the feasibility value of the landfill location is included in the interval class 129 – 224. and categorized as “Required Enough”..
ISOLASI, IDENTIFIKASI DAN UJI AKTIVITAS ANTIBAKTERI MINYAK ATSIRI DARI KULIT KAYU AKWAY (Drimys arfakensis Gibbs) ASAL PEGUNUNGAN ARFAK PAPUA Hajjah Lita Chilviana Hajjah Lita Chilviana; Bimo Budi Santoso; Evelina Somar
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.v18i2.196

Abstract

ABSTRACT Isolation of essential oil by steam and water distillation method, identification by GC-MS and antibacterial activity test against essential oil of akway bark (D. arfakensis Gibbs) have been carried out. The results showed that the essential oil component of akway bark was composed of 142 compounds, which were dominated by 10 components. The ten suspected components are: 4,5-dimethyl-1-heksen (4,15%); 4-methyl-1-ol-3-penten (3,93%); 1,4-benzodioksan-2,3-diyldiacetate (3,59%); (E) 2,6-dimethyl-1,6-diol-2,7-octadene (3,32%); 1[5(1-Hidroxyethylidene)-1,3-cyclopentadien-1-yl]-ethanone; (3,28); 2-(2,5-hexadiynyloxy)tetrahydro-2H-pyran (3,08%); 3,7-dimethyl-1,6-octadiene (3,03%); 2-methyl-2-ol-4-penten (2,52%); 3-methyl-1-ol-4-penten (2,51%); 4,8-dimethyl-4-ol-1,7-nonadien (1,85%). Testing the antibacterial activity of Akway bark (D. arfakensis Gibbs) using the well diffusion method against four test bacteria, namely B. subtilis, E. coli, S. aureus, and S. typhi, showed that Akway essential oil (D. arfakensis Gibbs) had Inhibition with strong to very strong category. The inhibition of essential oils against the test bacteria B. subtilis, E. coli, S. aureus, and S. typhi, each had inhibition zones of 25 mm, 16.5 mm, 34 mm, and 22 mm. Keywords: D. arfakensis Gibbs., B. Subtilis, E. Coli, S. aureus, S. typhi and essential oil composition.
PENINGKATAN LUAS PERMUKAAN KONVERTER RADIASI MATAHARI UNTUK MENINGKATKAN TEMPERATUR DAN DAYA LISTRIK YANG DIHASILKAN OLEH SISTEM GENERATOR TERMOLISTRIK Selestina Yulita Merit Bame; Ishak Semuel Erari; Abdul Muis Muslimin; Sangaji Hasmi Maharani Ipa
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.v18i2.193

Abstract

The development of the use of solar energy as a new renewable energy is being encouraged in various forms of its use, and one of them is the conversion of solar energy into electrical energy. The Thermoelectric Generator (TEG) module is a power generation system that utilizes temperature differences to produce electric power. The temperature difference can be obtained from solar radiation the metal will convert into heat energy, which will pass through the TEG and be discharged into the environment. The amount of solar radiation converted into heat depends on the area of ​​the converter. This research aim is to increase the surface area of ​​the solar converter to increase the temperature used in the TEG system to generate electric power. The areas used for capturing solar radiation are 0.06 m2, 0.12 m2 and 0.16 m2 which are made of black aluminum plates in a closed system. At the bottom of the aluminum are installed 7 thermoelectric modules connected to a water reservoir as a coolant. The results of the study showed that the highest temperatures that could be achieved were respectively 39.1, 52.5 and 61oC, and the temperature differences that could be achieved were respectively 9.1; 20.0 and 28 oC. A temperature difference of 7.1 oC produces an electric power of 64.2 mW, and a temperature difference of 28 oC produces an electric power of 282.8 mW.
EFISIENSI TERMAL DESAIN SISTEM PEMANAS AIR ENERGI MATAHARI DENGAN VARIASI JUMLAH PIPA BESI Rosalina Rosina Mirino; Kharl Hainz Yarama Rumbiak; Mujasam Mujasam
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.v18i2.199

Abstract

This study aims to determine the average value of hot water temperature and thermal efficiency that can be produced by using iron pipes as fluid collectors in the Solar Energy Water Heater design system. Collector pipes are made in three variations of 5, 7 and 9 pipes which are placed in a wooden box with transparent glass as a cover on the collector surface. The inside of the wooden box is lined with styrofoam and aluminum foil to reduce heat loss to the environment. Data were collected by observing and measuring the temperature of hot water with three variations of the number of pipes, each variation of the number of pipes carried out for three days. This water temperature measurement was carried out for 6 hours, from 10.20-16.30 WIT. The average maximum temperature produced for a total of 5 collector pipes is 59.70C, a total of 7 pipes is 63.70C, and a total of 9 collector pipes is 61.70C. The thermal efficiency value of the solar energy water heating system design for the number of 5 collector pipes is 96% , the number of 7 collector pipes is 97%, and the 9 collector pipes is 99%.

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