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All Journal Biospecies Peronema Forestry Science Journal Aquacoastmarine Ganendra: Majalah IPTEK Nuklir Metalurgi Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan Depik Jurnal Ilmu-Ilmu Perairan, Pesisir, dan Perikanan
Yunasfi Yunasfi
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Computer Science & IT Earth & Planetary Sciences Education Engineering Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Other

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STRUKTUR DAN KOMPOSISI VEGETASI MANGROVE DI DUSUN II DESA PULAU SEMBILAN KECAMATAN PANGKALAN SUSU KABUPATEN LANGKAT SUMATERA UTARA Yolanda Rizwany; Yunasfi Yunasfi; Ahmad Mutadi
AQUACOASTMARINE Vol 4, No 3 (2016): JURNAL AQUACOASTMARINE
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (651.194 KB)

Abstract

Mangrove forest ecosystem is a type of forest that are mostly located along the coast or a river that survival is affected by the tide. Ecosystems mangrove in village II of sembilan island has long used surrounding peoples for land aquaculture and firewood. This research aims to determine the structure and composition of mangrove vegetation, water quality, soil pH conditions and the substrate. This research is done in March 2016 till May 2016. The research was conducted sampling analysis of vegetation transect method. Mangrove species found in the research is 27 species of 12 families. Mangrove density value at station I 4700 ind/ha, station II 4767 ind/ha, station III 4067 ind/ha, station IV 4800 ind/ha, station V 3667 ind/ha. Based on living environment minister No. 201/2004, the density of mangrove in village II of Sembilan Island included in the category of very dense (both categories). The quality of physical and chemical water, for the parameters temperature range of 29-30°C, the current velocity 0,045-0,017 m/s, pH of the water 7.03-7.33, salinity 24-26o/oo and soil pH 6,59-7,21. The value is still quite ideal (optimum) for mangrove growth. Mangrove substrate types in this research is loam, clay, sandy clay loam, and sandy clay.Key Words : Mangrove, Sembilan island, Substrate, Water quality
KARAKTERISASI SIFAT LISTRIK GRAFIT SETELAH IRADIASI DENGAN SINAR GAMMA Yunasfi Yunasfi; Setyo Purwanto; Tria Madesa
GANENDRA Majalah IPTEK Nuklir Volume 14 Nomor 2 Juli 2011
Publisher : Website

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (150.589 KB) | DOI: 10.17146/gnd.2011.14.2.34

Abstract

KARAKTERISASI  SIFAT LISTRIK GRAFIT SETELAH IRADIASI DENGAN SINAR-g. Telah dilakukan penelitan tentang karakterisasi sifat listrik grafit hasil iradiasi dengan sinar-g. Serbuk grafit dibuat dalam bentuk pelet dengan daya tekan sampai 20 ton. Pada penelitian ini, diamati perubahan sifat listrik grafit setelah diiradiasi dengan sinar-g pada berbagai variasi dosis (100 kGy – 600 kGy). Karakterisasi sifat listrik grafit dilakukan dengan menggunakan alat ukur LCR meter. Hasil pengukuran sifat listrik pelet grafit dengan LCR menunjukkan bahwa nilai konduktivitas dan kapasitansi listrik grafit meningkat akibat radiasi sinar-g, dan nilai ini semakin meningkat seiring dengan bertambahnya dosis radiasi. Peningkatan nilai ini mencapai sekitar 43,2 % untuk nilai konduktivitas dan sekitar 55,4 % untuk nilai kapasitansi setelah diirradiasi dengan sinar-g sampai dosis 600 kGy. Peningkatan nilai ini diperkirakan akibat meningkatnya frekuensi interaksi antara radiasi sinar-g dengan bahan grafit (dalam hal ini adalah elektron), yang menyebabkan daya tampung listriknya meningkat, sehingga sifat listrik bahan grafit tersebut menjadi lebih besar. Kata kunci : Radiasi sinar-g, grafit,  sifat listrik
SIFAT LISTRIK DAN MAGNETIK LAPISAN TIPIS NANOKOMPOSIT Fe-C/Si(100)[Electrical and Magnetic Properties of Fe-C/Si(100) Nanocomposite Thin Film.] Yunasfi Yunasfi; Mashadi Mashadi; Saeful Yusuf
Metalurgi Vol 28, No 2 (2013): Metalurgi Vol.28 No.2 Agustus 2013
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (552.549 KB) | DOI: 10.14203/metalurgi.v28i2.250

Abstract

KARAKTERISASI NANOSTRUKTUR KARBON DARI GRAFIT HASIL MILLING[Characterization of Nanostructured Carbon from Graphite as Milling Product] Yunasfi Yunasfi
Metalurgi Vol 27, No 3 (2012): Metalurgi Vol.27 No.3 Desember 2012
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (599.5 KB) | DOI: 10.14203/metalurgi.v27i3.238

Abstract

Hubungan panjang berat dan faktor kondisi ikan belodok (Famili: Gobiidae) pada ekosistem mangrove di Desa Pulau Sembilan Kabupaten Langkat Provinsi Sumatera Utara Bill Maulana Bidawi; Desrita Desrita; Yunasfi Yunasfi
Depik Vol 6, No 3 (2017): December 2017
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (399.676 KB) | DOI: 10.13170/depik.6.3.7029

Abstract

The aims of the research was to examine the lenght weight relationships, growth pattern and condition factor of mudskipper (Family: Gobiidae) at the mangrove ecosystem. The research was conducted for two months from March to April 2016 at the mangrove ecosystem in the Sembilan Island village. The result showed that there are three species of mudskipper found in study area, namely Periophthalmus chrysospilos, Periophthalmus gracilis, and Boleophthalmus boddarti.  The growth pattern of mudskipper with a value b 3,  indicate a allometrik negative growth pattern and the condition factor was between 1-2.Penelitian ini bertujuan untuk menganalisis hubungan panjang bobot, pola pertumbuhan dan faktor kondisi ikan belodok (Famili: Gobiidae) pada ekosistem mangrove di di desa Pulau Sembilan Langkat. Penelitian dilaksanakan selama dua bulan yaitu Maret sampai April 2016. Penelitian ini menggunakan metode purposive random sampling. Hasil penelitian ditemukan 3 spesies ikan belodok di lokasi penelitian yaitu Periophthalmus chrysospilos, Periophthalmu sgracilis, dan Boleophthalmus boddarti. Pola pertumbuhan ikan belodok dengan nilai b 3, mengindikasikan pola pertumbuhan allometrik negatif. Faktor kondisi dari Ikan Belodok berkisar 1 – 2.
Hubungan panjang berat dan faktor kondisi ikan belodok (Famili: Gobiidae) pada ekosistem mangrove di Desa Pulau Sembilan Kabupaten Langkat Provinsi Sumatera Utara Bill Maulana Bidawi; Desrita Desrita; Yunasfi Yunasfi
Depik Vol 6, No 3 (2017): December 2017
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.6.3.7029

Abstract

The aims of the research was to examine the lenght weight relationships, growth pattern and condition factor of mudskipper (Family: Gobiidae) at the mangrove ecosystem. The research was conducted for two months from March to April 2016 at the mangrove ecosystem in the Sembilan Island village. The result showed that there are three species of mudskipper found in study area, namely Periophthalmus chrysospilos, Periophthalmus gracilis, and Boleophthalmus boddarti.  The growth pattern of mudskipper with a value b 3,  indicate a allometrik negative growth pattern and the condition factor was between 1-2.Penelitian ini bertujuan untuk menganalisis hubungan panjang bobot, pola pertumbuhan dan faktor kondisi ikan belodok (Famili: Gobiidae) pada ekosistem mangrove di di desa Pulau Sembilan Langkat. Penelitian dilaksanakan selama dua bulan yaitu Maret sampai April 2016. Penelitian ini menggunakan metode purposive random sampling. Hasil penelitian ditemukan 3 spesies ikan belodok di lokasi penelitian yaitu Periophthalmus chrysospilos, Periophthalmu sgracilis, dan Boleophthalmus boddarti. Pola pertumbuhan ikan belodok dengan nilai b 3, mengindikasikan pola pertumbuhan allometrik negatif. Faktor kondisi dari Ikan Belodok berkisar 1 – 2.
Hubungan panjang berat dan faktor kondisi ikan belodok (Famili: Gobiidae) pada ekosistem mangrove di Desa Pulau Sembilan Kabupaten Langkat Provinsi Sumatera Utara Bill Maulana Bidawi; Desrita Desrita; Yunasfi Yunasfi
Depik Vol 6, No 3 (2017): December 2017
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.6.3.7029

Abstract

The aims of the research was to examine the lenght weight relationships, growth pattern and condition factor of mudskipper (Family: Gobiidae) at the mangrove ecosystem. The research was conducted for two months from March to April 2016 at the mangrove ecosystem in the Sembilan Island village. The result showed that there are three species of mudskipper found in study area, namely Periophthalmus chrysospilos, Periophthalmus gracilis, and Boleophthalmus boddarti.  The growth pattern of mudskipper with a value b 3,  indicate a allometrik negative growth pattern and the condition factor was between 1-2.Penelitian ini bertujuan untuk menganalisis hubungan panjang bobot, pola pertumbuhan dan faktor kondisi ikan belodok (Famili: Gobiidae) pada ekosistem mangrove di di desa Pulau Sembilan Langkat. Penelitian dilaksanakan selama dua bulan yaitu Maret sampai April 2016. Penelitian ini menggunakan metode purposive random sampling. Hasil penelitian ditemukan 3 spesies ikan belodok di lokasi penelitian yaitu Periophthalmus chrysospilos, Periophthalmu sgracilis, dan Boleophthalmus boddarti. Pola pertumbuhan ikan belodok dengan nilai b 3, mengindikasikan pola pertumbuhan allometrik negatif. Faktor kondisi dari Ikan Belodok berkisar 1 – 2.
Co-Authors Ade Khana Saputri Ahmad Muhtadi Ahmad Mutadi Audya Rahman Bill Maulana Bidawi BUDI UTOMO Darmanto Ambarita Desrita Desrita Devita Mala Sari Dilla Ersyahdes Riski Eka Sapta Prasetya Silalahi Evan Kharogi Sinulingga Henny E. N. Gultom Hesti Wahyuningsih Humayra Nasution Indah K Sihombing Lestari Marbun M. Luthfi Dharmawan Maidita Fitri br Purba Mashadi Mashadi Miswar Budi Mulya Mohammad Basyuni Monalia Hutauruk Muhaimin Zikri Pratama Novha Nurul Fadillah Pindi Patana Rachel Nababan Sabilah Fi Ramadhani Saeful Yusuf Setyo Purwanto Tria Madesa Try Miharza Ulinar Amantha Pasaribu Yolanda Rizwany