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INDONESIA
MEDIAN
Published by Universitas Muhammadiyah Sorong
ISSN : 19797540     EISSN : 26144298     DOI : -
Core Subject : Education,
Other
Median (Jurnal Ilmu Eksakta) adalah jurnal yang diterbitkan LPPM Univ. Muhammadiyah Sorong dan Fakultas Pertanian dengan frekuensi terbitan tiga kali dalam satu tahun, yakni februari, Juni dan Oktober. Ruang lingkup jurnal ini antara lain Agroteknologi, Perikanan, dan ilmu eksakta lainnya.
Arjuna Subject : -
Articles 129 Documents
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citra satellite The changes in mangrove land cover area using satellite image data in South Manokwari District, Manokwari Regency.: Perubahan Luasan Manggrove Menggunakan Data Citra Satelit di Distrik Manokwari Selatan Kabupaten Manokwari Irnawati, Irnawati; Milangoni, Elok; Febriadi, Ihsan; Soekamto, Mira Herawati
Median : Jurnal Ilmu Ilmu Eksakta Vol. 16 No. 1 (2024): Jurnal Median
Publisher : Universitas Muhammadiyah Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33506/md.v16i1.3272

Abstract

Mangroves are one of the defining characteristics of transitional plants between the sea, water bodies, and land. They are only found in tropical and subtropical regions with some extreme conditions such as high salt content, high temperatures, high waves, sedimentation, and mud. The distribution of mangroves in Indonesia with the highest dense cover is in Papua Province with a total area of ​​1,084,514 hectares, and West Papua Province has mangrove forests with a total area of ​​483,800 hectares, 76% of which are primary mangrove forests and the rest are secondary mangrove forests (24%). One method to determine changes in the area of ​​mangrove vegetation is remote sensing technology aimed at identifying changes in the mangrove area covered by the mangrove ecosystem over different periods as potential forest resources using Composite image software ER Mapper series 6.4. Research results During the period 2014 - 2023, there has been a change in the area of ​​mangroves in South Manokwari District with a degraded mangrove forest area of ​​53,767 hectares, with a deforestation area of ​​5,974 hectares per year. In the same period, forest degradation of 43,442 hectares also occurred with a degradation area per year of 4,827 hectares. The accuracy level value of Landsat satellite image classification for changes in mangrove area in South Manokwari District, Manokwari Regency in 2014, 2017, 2020, and 2023 reached 92.5%, which means it is quite accurate
Kondisi Habitat dan Kualitas Madu Lebah Tanpa Sengat Kampung Rimba Jaya Kabupaten Biak Numfor: Kondisi Habitat dan Kualitas Madu Lebah Tanpa Sengat Kampung Rimba Jaya Kabupaten Biak Numfor sinery, anton; Manusawai, Jacob; Pakpahan, Elman Sihar
Median : Jurnal Ilmu Ilmu Eksakta Vol. 16 No. 2 (2024): Jurnal Median
Publisher : Universitas Muhammadiyah Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33506/md.v16i2.3486

Abstract

Tujuan dari penelitian ini ialah untuk menentukan jenis-jenis habitat dan budidaya madu lebah trigona oleh komunitas masyarakat, untuk melihat habitat dan ketersediaan sumber pakan di alam, proses budidaya madu lebah oleh masyarakat serta menentukan kualitas produksi madu lebah yang dihasilkan. Jenis madu trigona yang ditemukan di sekitar Kampung Rimba Jaya telah dikelola dan dipanen dengan cara dipindahkan dari kayu dan dimasukan ke dalam kotak kayu yang mana mempermudah proses pemanenan dan pengontrolan terhadap hive. Dari hasil analisis diperoleh informasi bahwa kandungan protein pada madu berkisar antara 1,14 hingga 1,23%.
Bahasa Indonesia Optimasi Kualitas Lem kertas PG 6802 ALV Menggunakan Pendekatan Pengukuran pH, Density, Solid Content dan Viskositas : optimasi kualitas lem kertas Risma Sari; Armin, Muhammad Ikhlas; Saputra, Muhammad Alif
Median : Jurnal Ilmu Ilmu Eksakta Vol. 16 No. 2 (2024): Jurnal Median
Publisher : Universitas Muhammadiyah Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33506/md.v16i2.3515

Abstract

Polymers are essential components in various aspects of human life, particularly in the production of different types of materials and products. One of the primary applications of polymers is in the manufacturing of adhesives or glues used to bond various substrates. PG 6802 ALV adhesive, for example, is widely used in the ceramic box industry. This research was conducted to test the characteristics of PG 6802 ALV adhesive in several production batches at PT. XYZ, namely batches 0119LSA001, 0219LSA002, and 0219LSA004. One of the measured parameters was the viscosity of the adhesive using a Brookfield viscometer with a spindle 0.4 at a speed of 10 rpm. The measurement results Brookfield viscometer with a spindle 0.4 at a speed of 10 rpm. The measurement results showed that the viscosity of PG 6802 ALV adhesive ranged between 10500 cps, 10400 cps, and 11600 cps. Additionally, measurements of the adhesive's solid content were obtained in the range of 60.40% to 60.95%. The density of PG 6802 ALV adhesive ranged from 1.0528 to 1.0705 g/ml, while the pH was in the range of 5. In conclusion, this research provides an overview of the physical and chemical characteristics of PG 6802 ALV adhesive in several production batches. The measurement results of viscosity, solid content, density, and pH provide important information for a better understanding of the properties of this adhesive. This knowledge can be utilized for the development of improved products and the enhancement of the production process in the ceramic box industry and other adhesive applications.
Analisis Pertumbuhan Gulma Asystasia gangetica (L.) T. Anderson Untuk Pemanfaatan Sebagai Tanaman Penutup Tanah Asbur, Yenni; Purwaningrum, Yayuk; Lubis, Fiqi Alfisar; Maruapey, Ajang
Median : Jurnal Ilmu Ilmu Eksakta Vol. 16 No. 2 (2024): Jurnal Median
Publisher : Universitas Muhammadiyah Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33506/md.v16i2.3520

Abstract

Asystasia gangetica merupakan gulma invasif dengan daya adaptasi yang tinggi sehingga sangat berpotensi untuk dimanfaatkan sebagai penutup tanah. Namun pengembangan penggunaan A. gangetica sebagai penutup tanah belum dapat dilakukan secara luas karena keterbatasan data ilmiah terutama mengenai pertumbuhan dan perkembangannya serta sifat interaksinya dengan tanaman pangan di lahan kering. Penelitian dilaksanakan di Kebun Percobaan Fakultas Pertanian Universitas Islam Sumatera Utara (UISU), Gedung Johor, Medan. Pengamatan dilakukan secara destruktif pada 10 tanaman setiap minggunya. Dari hasil amatan setiap minggunya terlihat bahwa A. gangetica mudah diperbanyak menggunakan stek batang karena pertumbuhan akar relatif cepat. Pertumbuhan dan perkembangan A. gangetica juga relatif cepat yang terlihat dari pertambahan tinggi tanaman, jumlah cabang, jumlah daun, ILD, laju asimilasi bersih, dan laju tumbuh relatif. Laju penutupan lahan juga cepat, yaitu menutup lahan 100% pada 9 MST, sehingga memenuhi kriteria sebagai penutup tanah. 
Tata Niaga, Nilai Ekonomi dan Kualitas Kulit Kayu Masohi di Kabupaten Fakfak Provinsi Papua Barat Hegemur, Siti Hanafiah; pono, wahyudi sayuti; Nugroho, Bambang; Mahmud
Median : Jurnal Ilmu Ilmu Eksakta Vol. 16 No. 2 (2024): Jurnal Median
Publisher : Universitas Muhammadiyah Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33506/md.v16i2.3591

Abstract

Massoi (Cryptocarya massoi (Oken) Kostem) is non-timber forest products of spices utillized for as food flavour, traditional medicine, and pharmacheutical material. This research is designed to describe the market chain, economic values, natural disturbance in local farming lands, natural regenarion, legal harvesting permit, and evaluate masohi bark quality to SNI 7941:2013, and determine an intervention for to increase the added values for local farmers. This research was undertaken in 13 villages at 6 subdistricts in Fakfak district West Papua. Interviews based on the questioner and field survey were conducted to collect the data. The results indicated that qualitatively local farming land for Masohi is 102,5 ha in total with for an average distance of 3.23 km form their homes. These farming land are scattered in both secondary and primary forest, cultivated with agroforestry system and planted insite ot in between Myristica trees. Regenerations are done using local nursery and natural sapling from the mother trees. Prices of the dried masohi bark have vary, at farmer IDR 50.000 – 60.000/kg, local collecter traders IDR 70.000/kg and legal harvesting permit holders for IDR 120.000/kg. An innovation for producing packaging masohi products with labels, standaritation and certification could provide significant impact on the added value for local farmers. The majoritas (53,85%) for legal harvesting permit is non-local communities. Local regulation is needed to gain the added values for masohi farmers. Masohi bark collected from Fakfak district could be utilized for raw material for Jamu and essential oil but properly drying is required to reduce the moisture content and elimate fungi contamination.
Potensi Dan Sebaran Diameter Batang Terhadap Dugaan Sekuestrasi Karbon Pada Tegakan Dipterocarpaceae Di Taman Wisata Alam Sorong Maruapey, Azis; Nanlohy, Lona H.; Saeni, Fajrianto; Ohorella, Syarif
Median : Jurnal Ilmu Ilmu Eksakta Vol. 16 No. 1 (2024): Jurnal Median
Publisher : Universitas Muhammadiyah Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33506/md.v16i1.3613

Abstract

This research was carried out in the Sorong Nature Tourism Park (TWA) Forest area from August 2023. This research aims to determine potential, biomass per diameter, biomass per unit area; and the amount of carbon stored in stands of Dipterocarpaceae species in the Sorong TWA forest. The potential stands of dipterocarpaceae species found in the Sorong TWA forest are 398 trees or an average of 39.8 trees/ha. The types of dipterocarpaceae stands found were Resak (Vatica papuana), Mersawa (Anisoptera spp.), and Merawan (Hopea sangol). The distribution of dipterocarpaceae stands is quite even, with the Vatica species being very dominant, namely 156 trees or 15.6 trees/ha, Mersawa with 132 trees or 13.2 trees/ha, and Hopea with 110 trees or 11.0 trees/ha. The total standing biomass of dipterocarpaceae species was 38.82 tonnes/ha, with details for the Vatica species contributing the most biomass, namely 16.58 tonnes/ha, Mersawa 12.49 tonnes/ha and Hopea 9.75 tonnes/ha. Meanwhile, the total biomass per area is 3.88 tons per hectare. The greatest amount of biomass is stored in stands of trees with a diameter > 30 cm compared to those with a diameter < 30 cm. The stored carbon reserve content of dipterocarpaceae stands is 1.78 tonnes/ha, so assuming the Sorong TWA forest has an area of ​​945.90 ha, it is estimated that the amount of carbon stored in dipterocarpaceae stands is 1683.70 tonnes.
Analisis Tingkat Keberhasilan Penanaman Anakan Mangrove Di Kelurahan Klawalu Kota Sorong Wonatorey, Yesaya O. A; Pattiwael, Maya; Turot, Amatus
Median : Jurnal Ilmu Ilmu Eksakta Vol. 16 No. 3 (2024): Jurnal Median
Publisher : Universitas Muhammadiyah Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33506/md.v16i3.4130

Abstract

Kerusakan hutan mangrove yang terjadi di berbagai daerah masih membutuhkan penanganan yang serius, baik oleh pemerintah daerah maupun masyarakat sekitar. Kegiatan rehabilitasi dapat menjadi pilihan untuk memulihkan ekosistem mangrove. Upaya rehabilitasi mangrove telah dilakukan di Kota Sorong Provinsi Papua Barat Daya pada areal seluas 48 hektar. Tujuan dilaksanakannya penelitian ini adalah untuk mengetahui tingkat keberhasilan penanaman dan kondisi kesehatan anakan mangrove di Kelurahan Klawalu Kota Sorong. Penelitian ini menggunakan anakan mangrove yang ditanam pada bulan oktober 2023 sebagai bahan penelitian dengan menggunakan metode transek. Jumlah sampel yang digunakan adalah 360 anakan yang dibagi pada 10 jalur penelitian. Analisis data dilakukan dengan rumus survival rate dan persentase kesehatan tanaman. Hasil dari penelitian ini adalah presentase tanaman hidup secara keseluruhan pada lokasi 3 mencapai 79,72% dan termaksud kategori baik. Sementara itu untuk kesehatan tanaman yang paling tertinggi adalah 94,44% dan terendah 70,73 % dengan persentase kesehatan tanaman secara keseluruhan untuk lokasi 3 sebesar 81,18%.
Etnobiologi Dan Interdependensi Masyarakat Terhadap Kawasan Konservasi (Studi Masyarakat Sekitar Taman Wista Alam Klamono Papua Barat Daya) Maruapey, Azis; Nanlohy, Lona Helti; Saeni, Fajrianto
Median : Jurnal Ilmu Ilmu Eksakta Vol. 16 No. 3 (2024): Jurnal Median
Publisher : Universitas Muhammadiyah Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33506/md.v16i3.4174

Abstract

As a conservation area, the Klamono Nature Tourism Park is also expected not only for tourism purposes, but also as a life support area for the surrounding community who are dependent on natural resources, both wood and non-timber forest products. The method used in this research is a descriptive method with survey techniques and semi-structural interviews. The results of the research show communally that the community in utilizing the Klamono Nature Tourism Park conservation area is farming, hunting and gathering which is of ethnobiological significance and interdependence (dependence) on the availability of forest resources in the park area. Ethnobiology and community interdependence are interpreted by the perception that forests are a source of food, forests are a source of medicines, forests are a source of building materials, forests are a source of firewood and forests are a source of cash income.
Biomasa Karbon Below Ground Paraserianthes Falcataria (L.) Nielsen pada Lahan Agroforestri Tradisional di Distrik Aimas, Sorong Ohorella, Syarif; Siburian, Rima H; Febriadi, Ihsan
Median : Jurnal Ilmu Ilmu Eksakta Vol. 16 No. 3 (2024): Jurnal Median
Publisher : Universitas Muhammadiyah Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33506/md.v16i3.4176

Abstract

Forests as part of the environment have a big role in maintaining ecosystem stability. One of them is as a carbon store. Vegetation in forests can prevent the release of carbon into the atmosphere through the process of photosynthesis where vegetation absorbs CO2 then breaks it down and stores it in the form of biomass. This is what makes it important for forest friends to study their ability to store biomass and carbon specifically on Agroforestry land as one of the site level forest management units. The aim of this research is to develop an allometric equation model to estimate the value of carbon biomass stored in bellow ground specifically for stands on traditional agroforestry land. The method used is a destructive sampling by selecting sample trees purposively and selecting three samples. trees with different diameters at breast height (dbh) but the same age representing stands on agroforestry land in Aimas District, Sorong Regency. biomass and carbon measurements were carried out through laboratory tests. The total below ground biomass content of the 19 of Paraserianthes falcataria stands obtained was 0.369 tons/ha. The below ground carbon content of sengon stands on 2.8 hectares of agroforestry land is 0.184 tonnes C/ha.
Production of Oyster Mushrooms (Pleurotus Ostreatus) on Tofu Dregs Growing Media Geli, Geli Kulla
Median : Jurnal Ilmu Ilmu Eksakta Vol. 17 No. 1 (2025): Jurnal Median
Publisher : Universitas Muhammadiyah Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Abstract This research aims to evaluate the effect of planting media on the growth and production of white oyster mushrooms (Pleurotus ostreatus). The method used was a Randomized Block Design (RAK) with treatment varying the concentration of tofu dregs, namely 0%, 10%, 20%, 30%, and 40%, each consisting of 3 replications with each replication totaling 25 bag logs. Each treatment consisted of 15 baglogs, so the total was 75 baglogs. The results showed that the addition of 20% concentration of tofu dregs resulted in optimal mycelium growth, as well as increasing the number of capped stems, number of pinheads, and weight of oyster mushrooms. Thus, it can be concluded that tofu dregs are effective in increasing oyster mushroom productivity. In addition, this research also identified that the use of tofu dregs not only increases harvest yields, but also contributes to reducing organic waste by utilizing tofu dregs which are usually wasted as a planting medium. This shows that oyster mushroom production can be done sustainably. These findings open up opportunities for innovation in mushroom cultivation and agricultural waste management.

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