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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 160 Documents
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SURVEI OF MAMALIA IN MAMBERAMO-FOYA AREA Aksamina Yohanita; Kris Helgen; Yance de Fretes
Jurnal Natural Vol. 6 No. 1 (2007): Jurnal Natural
Publisher : FMIPA Universitas Papua

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Abstract

A Rapid Assessment Program survey (RAP survey) was carried out at Kwerba and the Foya mountains, Papua on November-December 2005. The survey was intended to search for the diversity of mammalian species in the area of Kwerba village, Mamberamo River, Muara Manirim and Muara Hotije (on the lowland) and the Foya mountains (on the highland). The survey found 38 species of mammalian, grouped into 13 family. One spectacular founding was the recording of two unique species, the “kanguru pohon mantel emas” (Dendrolagus pulcherrimus) and the “landak Irian” (Zaglossus sp.).
STUDI ETNOBIOLOGI PANDANUS DI PAPUA Maria Justina Sadsoeitoeboen; Agustinus Kilmaskossu
Jurnal Natural Vol. 6 No. 1 (2007): Jurnal Natural
Publisher : FMIPA Universitas Papua

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Abstract

A research was carried out to study the diversity of Pandanus in the Papua region. The aim of the study was to find out how many species of Pandanus were all ready known by the people and used in their daily life. There are 42 species of Pandanus found in Papua. Based on the traditional utilization of the people in the Papua Tribe, Pandanus can be divided into seven group, i.e.: (1) species which are used for edible fruit, (2) species which are used for floor of houses, (3) species which are used for roofing, (4) species which are used for sleeping mat and rain covering, (5) species used for hunting, (6) species used for medicine, and (7) species which are still unknown.
SKRINING FITOKIMIA, UJI AKTIVITAS ANTIMIKROBA DAN ANTITUMOR TUMBUHAN OBAT KABUPATEN MANOKWARI Bimo B. Santoso
Jurnal Natural Vol. 6 No. 1 (2007): Jurnal Natural
Publisher : FMIPA Universitas Papua

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Abstract

Pythochemistry screening and testing of antimicrobial and antitumor activities was carried out on 31 species of medicinal plants distributed around Manokwari Regency. All parts of the plants were collected and screened for the presence of alkaloids, saponins, and tannins; antimicrobial and antitumor activity. The number of positive tests obtained are 17 (55, 3%) for alkaloids, 6 (19, 4%) for saponins, and 26 (84, 7%) for tannins. Eleven species shown inhibition activities (antimicrobial) to Candida albicans, Staphyloccocus aureus, and Echericia colii while only seven species have antitumor activity, especially against tumor cell P-388.
CHARACTERISATION OF DISSOLVED ORGANIC CARBON (DOC) LEACHED FROM LEAVES IN WATER Markus Heryanto Langsa
Jurnal Natural Vol. 6 No. 1 (2007): Jurnal Natural
Publisher : FMIPA Universitas Papua

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Abstract

Penelitian ini bertujuan untuk menentukan senyawa organik khususnya organic karbon terlarut (DOC) dari dua spesies daun tumbuhan (wandoo eucalyptus and pinus radiate, conifer) yang larut dalam air selama periode 5 bulan leaching eksperimen. Kecepatan melarutnya senyawa organic ditentukan secara kuantitatif dan kualitatif menggunakan kombinasi dari beberapa teknik diantaranya Total Organic Carbon (TOC) analyser, Ultraviolet-Visible (UV-VIS) spektrokopi dan pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS). Hasil analisis DOC dan UV menunjukkan peningkatan yang tajam dari kelarutan senyawa organic di awal periode pengamatan yang selanjutnya berkurang seiring dengan waktu secara eksponensial. Jumlah relatif senyawa organic yang terlarut tergantung pada luas permukaan, aktifitas mikrobiologi dan jenis sampel tumbuhan (segar atau kering) yang digunakan. Fluktuasi profil DOC dan UV254 disebabkan oleh aktifitas mikrobiologi. Diperoleh bahwa daun kering lebih mudah terdegradasi menghasilkan senyawa organic dalam air dibandingkan dengan daun segar. Hasil pyrolysis secara umum menunjukkan bahwa senyawa hidrokarbon aromatic dan fenol (dan turunannya) lebih banyak ditemukan pada residue sampel setelah proses leaching kemungkinan karena adanya senyawa lignin atau aktifitas humifikasi mikrobiologi membuktikan bahwa senyawa-senyawa tersebut merupakan komponen penting dalam proses karakterisasi DOC.
Penerapan Deret Fourier Pada Sistem Pendengaran Manusia Tri Widjajanti
Jurnal Natural Vol. 5 No. 2 (2006): Jurnal Natural
Publisher : FMIPA Universitas Papua

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Abstract

Natural vane voices comes to the humaneary on the Forier Series P(t), while the human earing system only accepts the wore of voices on the Fourier Series berhingga Q (t). The different between Fories Series P(t) and Q(l) can be eliminase using. Approximation Quadrate Smallest Method.. Therefore q(t) is a result of natural vane approach.
ISOLASI DAN KARAKTERISASI ZAT WARNA Capsicum frutescens Bimo Budi Santoso
Jurnal Natural Vol. 1 No. 2 (2002): Jurnal Natural
Publisher : FMIPA Universitas Papua

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Abstract

Isolation and characterization of pigments from C. frutescens have been done. Three components (pigments) were eluted using column chromatography namely yellow pigment, orange pigment, and red pigment. Solvents used to separate the pigments were hexane/dichloroethane, dichloroethane, dichloroethane/methanol and chloroform/dichloroethane. Isolated pigments were subjected to TLC to prove the purity and to get the Rf value of the isolates. Then, the pure isolates were subjected to UV spectroscopy to get UV spectrum. Base on the data of polarity, pigment color, Rf value, and UV spectrum, the isolated components of C. frutescens are probably b-carotene (yellow pigment), phenolic or flavonoid compound (orange pigment), and capsanthin (red pigment).
AKTIVITAS HARIAN NAMDUR POLOS PERIODE SEBELUM KAWIN PADA KAWASAN PEGUNUNGAN ARFAK DISTRIK SURUREY ANGGI BARAT Jan Hendriek Nunaki
Jurnal Natural Vol. 1 No. 2 (2002): Jurnal Natural
Publisher : FMIPA Universitas Papua

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Abstract

A research has been done on the daily activities of “Namdur Polos” or Bowerbird (Amblyornis inornatus) on the pre-copulation period in the Arfak Montain Protected Areas, especially in the district of Sururey, West Anggi. The variables observed in the research are decoration, feeding, socialization and home range activities. The result shows that Namdur Polos spend 8,5% in decoration, 10,2% in feeding and 81,3% in socialization. It was concluded that the bowerbird invests a lot of time on the social activity during the pre copulation period, shown by playing on the twigs above the “copulation hut”.
THE EFFECTS OF GROUNDWATER ABSTRACTION ON THE GNANGARA AND JANDAKOT MOUNDS, PERTH REGION WESTERN AUSTRALIA Baina Afkril
Jurnal Natural Vol. 1 No. 2 (2002): Jurnal Natural
Publisher : FMIPA Universitas Papua

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Abstract

Tulisan ini merupakan hasil penelitian tentang pengaruh abstraksi permukaan air bawah tanah pada dataran tinggi Gnangara dan Jandakot di wilayah Perth, Australia Barat. Dataran tinggi Gnangara berlokasi di bagian utara wilayah Perth sedangkan Jandakot di bagian selatan. Kedua dataran tinggi tersebut adalah sumber utama air bawah tanah untuk mensuplai semua kebutuhan air di wilayah Perth, yang membentang sepanjang pantai Swan dan terdiri dari lapisan pasir, silt stone dengan bentangan silt yang tidak teratur serta lapisan lempung dengan ketebalan antara 10 -100 m. Abstraksi air tanah dilakukan perusahaan air minum dan beberapa pihak lain dan berbagai industri dan perusahaan komersial lainnya. Sementara air tanah diperlukan untuk pertanian, industri dan kebutuhan komersial lainnya. Abstraksi yang berkepanjangan telah menimbulkan beberapa masalah terhadap kondisi air tanah di sekitar dataran tinggi Gnangara dan Jandakot. Masalah pertama adalah penutupan permukaan air tanah (water table). Selama periode 20 tahun (1974-1994) Abstraksi pada dataran tinggi Gnangara telah terjadi penurunan permukaan berkisar dari 3,0 m sampai 0,2 m. Sementara pada dataran tinggi Jandakot mengalami penurunan berkisar dari 1,5 m sampai 0,5. Karena penggunaan pompa dan tempat lainnya seperti ektensifikasi penggunaan lahan dan perubahan iklim C (cuaca) kondisi beberapa lahan basah sekitar wilayah Perth turun secara drastis. Selama periode 1976-1985 permukaan air pada danau Western di dataran tinggi Gnangara turun sekitar 1,0 m sedangkan permukaan Danau Estern berkurang sampai 3,0 m. Masalah kedua yang timbul akibat kegiatan abstraksi adalah peningkatan intrusi air laut pada daerah sumber air dekat pantai atau estuary. Salinitas air tanah pada dataran tinggi Gnangara adalah 130 mg/l TDS (Total Dissolved Solid), hampir mendekati nilai maximum yaitu 1200 mg/l TDS.
PERBANDINGAN ANTARA ANALISIS DATA LONGITUDINAL DAN SEKAT-SILANG Surianto Bataradewa
Jurnal Natural Vol. 1 No. 2 (2002): Jurnal Natural
Publisher : FMIPA Universitas Papua

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Abstract

Classical regression analysis is usually used in many analyses of longitudinal data or repeated measurement data (the response of each individual is observed repeatedly) . It assumed that there is no correlation between pairs of observations. Wherea, multiple observations on the same object generally produce correlated outcomes. Ignoring correlation in regression analysis can lead to incorrect conclusions. In longitudinal data analysis is to regard the correlations between pairs of observations in this case the structure of covariance. For this reason, inference from longitudinal data analysis can make more correct conclusions. The objective of the study is to know the effectiveness and efficiency of longitudinal data analysis to describe the change of response over time comparing of the cross sectional data analysis. Simulation data was used to investigate the behavior of longitudinal data analysis. The result of this study showed that longitudinal data analysis was powerful to increase the information of the change of the response over time succesfully. If the correlation between two observations in same object is increasing, the cross sectional data analysis becomes inefficient to describe means response as a function of time.
PERKEMBANGAN STATISTIKA DAN PENERAPANNYA DI BERBAGAI BIDANG Khairil A. Notodiputro
Jurnal Natural Vol. 1 No. 2 (2002): Jurnal Natural
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v1i2.98

Abstract

Statistic is a meaning of numbers of data analyses that can be used to describe the object or phenomenon faced. For example, the growth of population in a district or area can be analysed or predicted using variabel of birth rate, mortal rate, imigration and emigration rate. The quality of human resources can be reviewed from variabel of life standart index.(mutu standard index). On the other hands, statistica refers to a disipline of collecting, analising and as a skill of summerizing the analysis being mad.

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