Department of Biology: Recent submissions
Now showing items 441-460 of 1255
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Aktivitas Antimikroba Ekstrak Etanol Daun dan Bunga Tahi Ayam (Tagetes erecta Linn.) terhadap Pertumbuhan Streptococcus mutans, Shigella dysenteriae dan Candida albicans secara in Vitro
(Universitas Sumatera Utara, 2013)In vitro antimicrobial activity of ethanol leaves and flower extract of tahi ayam (Tagetes erecta Linn.) against growth of Streptococcus mutans, Shigella dysenteriae and Candida albicans has done. The purpose is to study ... -
Pengaruh Pemberian 2,4-D dan Frekuensi Subkultur terhadap Perubahan Genetik Kalus dari Bunga Betina Kelapa Sawit (Elaeis guineensis Jacq.)
(Universitas Sumatera Utara, 2014)The study of “The Effect of 2,4-D And Subculture Frequencies on Genetic Changes of Callus from Immature Female Inflorescences Of Oil Palm (Elaeis guineensis Jacq.)” has been done from March 2013 to April 2014 at Plant ... -
Studi Kebiasaan Makanan Ikan Cencen (Mystacoleucus marginatus) di Sungai Batang Toru Kabupaten Tapanuli Selatan
(Universitas Sumatera Utara, 2013)This study aims to investigate food habits of the species cencen fish (Mystacoleucus marginatus). The study was done from December 2012, in Batang Toru river. Fish samples, collected by net and gill net. Stomach content ... -
Struktur dan Produktivitas Rerumputan di Kawasan Danau Toba Desa Haranggaol Kecamatan Haranggaol Horison Kabupaten Simalungun Sumatera Utara
(Universitas Sumatera Utara, 2013)The structure and productivity of Grasses in Haranggaol Village Haranggaol Horison Subdistrict Simalungun Regency North Sumatra has been studied from April to July 2012. Sampling area was defined by purposive sampling ... -
Pengaruh Pemberian Vitamin C dan E terhadap Gambaran Histologis Testis Mencit (Mus musculus L.) yang Dipajankan Monosodium Glutamat (MSG)
(Universitas Sumatera Utara, 2013)This study aimed to determine the effect of vitamin C and E on testicular histology of mouse following exposure to monosodium glutamate (MSG) for 30 days. Experimental used Completely Randomized Design (CRD) consisting ... -
Keanekaragaman Pohon dan Pole serta Potensi Karbon Tersimpan di Kawasan Hutan Sekunder 30 Tahun dan Perkebunan Kopi Telagah, Langkat
(Universitas Sumatera Utara, 2013)The Diversity of Tree and Pole And Potential Of Carbon Stored In 30 Years Secondary Forest Area And Coffee Field at Telagah District of Langkat was investigated on February to June 2012. Study site was determined by ... -
Pertumbuhan Eksplan Tunas Apikal Kelapa Sawit (Elaeisguineensis Jacq.) pada Media MS dengan Kombinasi BAP dan 2,4-D
(Universitas Sumatera Utara, 2014)The research about oil palm (Elaeis guineensis Jacq.) apical bud in the MS medium by using combination 2,4-D and BAP has been performed in Tissue Culture Laboratory, Departemen of Biology, University of Sumatera Utara.The ... -
Laju Pertumbuhan Populasi Ikan Bawal Air Tawar (Colossoma Macropomum) dengan Pemberian Pakan Alami dan Buatan Serta Kombinasinya
(Universitas Sumatera Utara, 2014)It has been done the research about the growth rate of Colossoma macropomum population with different of feed. The purpose of this research is to know the better feed for the increasing of Colossoma macropomum population, ... -
Pengaruh Ekstrak Segar Limut (Hydrilla Verticillata L.) Danau Toba terhadap Kadar Kolesterol Total dan Gambaran Mikrostruktur Aorta Mencit (Mus Musculus L.)
(Universitas Sumatera Utara, 2014)Research has been conducted to determine the effect of fresh extracts limut (Batak Toba’s language) to total cholesterol levels and the thickness of aorta wall mice fed with diets egg yolk. Research using completely ... -
Isolasi dan Uji Ekstrak Metanol Bakteri Endofit Tapak Dara (Catharanthus Roseus) dalam Menghambat Pertumbuhan Beberapa Mikroba Patogen
(Universitas Sumatera Utara, 2014)A study of isolation of endophytic bacteria from tapak dara (Catharanthus roseus) and examination of methanol extracts in inhibited the growth of several pathogenic microbes such as Aspergillus flavus, Streptococcus ... -
Pengaruh Perbedaan Suhu terhadap Laju Pertumbuhan Ikan Tambra (Tor Tambra)
(Universitas Sumatera Utara, 2014)Effect of temperature on growth rate differences tambra (Tor tambra) has been performed. Tambra (Tor tambra) is one of the fish that have high economic value because of the taste of the meat is tasty and savory. The ... -
Keragaman Alga Merah (Rhodophyta) di Pantai Gamo Desa Sisarahili Gamo Kota Gunungsitoli Nias
(Universitas Sumatera Utara, 2014)An experiment in Gamo Seashore, Sisarahili Gamo Village Gunungsitoli City Nias has been conducted to know red algae diversity, physical and chemical parameters of water in relation to the diversity of red algae. Red algae ... -
Viabilitas Bacillus Sp. Bk17 pada Berbagai Bahan Pembawa
(Universitas Sumatera Utara, 2014)Viability study of Bacillus sp. BK17 in various carriers has been conducted. The isolate was kept in talc, tapioca, maizena powder, and chitosan for one month at room temperature and at 4ºC. The viability of isolate was ... -
Keragaman Alga Hijau (Chlorophyta) dan Alga Coklat (Phaeophyta) di Perairan Pantai Gamo Desa Sisarahili Gamo Kota Gunungsitoli Nias
(Universitas Sumatera Utara, 2014)An experiment in Gamo Seashore, Sisarahili Gamo Village Gunungsitoli City Nias has been conducted to know green and brown algae diversity, physical and chemical parameters of water in corrrelation with the diversity of ... -
Keanekaragaman Bentik Alga dan Hubungannya dengan Kualitas Air di Perairan Sungai Batang Toru Kabupaten Tapanuli Selatan
(Universitas Sumatera Utara, 2014)Batang Toru River is one of the largest river in South Tapanuli with length 69,32 Km. Benthic algae is one of the aquatic organisms thet live in it. Diversity of benthic algae research has been carried out in August 2013. ... -
Keanekaragaman Makroalga di Sekitar Pantai Desa Fodo Kota Gunungsitoli
(Universitas Sumatera Utara, 2014)The research of “Macroalgae Diversity at Beach Fodo Village, Gunungsitoli” has been done. The objectives of this research were to know the diversity of macroalgae and the correlation between physical-chemical factors and ... -
Pengaruh Sumber Karbon dan Nitrogen terhadap Pertumbuhan dan Pembentukan Spora Bacillus Sp. Bk17
(Universitas Sumatera Utara, 2014)Study of the effect of carbon and nitrogen sources on the growth and sporulation of Bacillus sp. BK17 has been conducted. Bacillus sp. BK17 was cultured in broth medium containing different carbon and nitrogen sources, ... -
Respon Pertumbuhan Tiga Varietas Cabai Rawit (Capsicum Frutescens L.) pada Beberapa Tingkat Salinitas
(Universitas Sumatera Utara, 2013)The research to observe growth responses of three varieties of chili peppers (Capsicum frutescens L.) to salinity treatment was conducted at The Plant Physiology Laboratory of Faculty Mathematics and Science, University ... -
Isolasi dan Uji Potensi Bakteri Tanah Pertanian Berastagi Sumatera Utara dalam Mendegradasi Insektisida Marshal Berbahan Aktif Karbosulfan
(Universitas Sumatera Utara, 2013)The isolation of bacteria from Berastagi agricultural soil Sumatera Utara has been done. The aim is to evaluate their ability in degrading carbosulfan. Sixteen bacterial isolates were obtained using selective media Bushnel ... -
Pengaruh Pemberian Vitamin C dan E terhadap Gambaran Histologis Hepar Mencit (Mus musculus L.) yang Dipajankan Monosodium Glutamat (MSG)
(Universitas Sumatera Utara, 2013)Experiment aimed to determine the effects of vitamin C and E on liver microstructure of mouse exposed to monosodium glutamate for 30 days. The experiment used complete randomized design which consists of 6 treatments ...