Department of Biology: Recent submissions
Now showing items 421-440 of 1255
-
Pengaruh 2,4-D dan Frekuensi Subkultur terhadap Perubahan Genetik Kultur Apikal Bud Kelapa Sawit (Elaeis Guineensis Jacq.) pada Media MS
(Universitas Sumatera Utara, 2014)The study of the effect of 2,4-D and subculture frequency on the genetic changes on the apical bud of oil palm in the MS medium has been carried out.The research method was designed according to Completely Randomized ... -
Viabilitas Bakteri Asam Laktat dalam Enkapsulasi Sinbiotik terhadap Penyimpanan dan Asam Lambung Tiruan
(Universitas Sumatera Utara, 2015)Probiotics are living microorganisms that provide health benefits to the host. Probiotics in the form of free-cells may decrease cell viability against environmental influences. This study aimed to get the lactic acid ... -
Pengaruh Cekaman Kekeringan terhadap Produktivitas Kedelai (Glyicine max (L.)Merril.) Hasil Radiasi Ultraviolet
(Universitas Sumatera Utara, 2013)The effect of drought stress to soybean productivity has been done in Genetic Laboratory, Natural Sciences Faculty and green house at Agriculture Faculty, University of Sumatera Utara, Medan. The experiment design was ... -
Gambaran Histologis Ginjal Mencit (Mus musculus L.) Strain DDW setelah Pembersihan Ekstrak N-Heksan Buah Andaliman (Zanthoxylum acanthopodium DC.)
(Universitas Sumatera Utara, 2014)The research has been conducted to study the effect of N-hexane extract of the andaliman fruit (Zanthoxylum acanthopodium DC.) to the histologic structure of mice kidney (Mus musculus L.) strain DDW. Experiment was ... -
Pemanfaatan Bakteri Kitinolitik dalam Menghambat Pertumbuhan Curvularia sp. Penyebab Penyakit Bercak Daun pada Tanaman Mentimun
(Universitas Sumatera Utara, 2013)A study about the utilization of chitinolytic bacteria isolates to inhibit growth of Curvularia sp. that cause leaf spot disease of cucumber has been done in Laboratoryof observation pest and disease, Medan Johor, ... -
Pengaruh Salinitas terhadap Aktivitas Enzim Lipase dari Bacillus cereus DA 5.2.3 dalam Degradasi Pakan Udang
(Universitas Sumatera Utara, 2014)One of the serious problems of intensive shrimp of aquaculture is the accumulation of shrimp feed at the bottom of shrimp farms. One content of shrimp feed is lipid. Bacillus cereus DA 5.2.3 was expected to degrade ... -
Pengaruh Kebisingan terhadap Jumlah Leukosit dan Hitung Jenis Leukosit Tikus Jantan (Rattus norvegicus) Galur Wistar
(Universitas Sumatera Utara, 2014)This research had done in the Laboratory of Animal Physiology, Department of Biology, Faculty of Mathematics and Natural Sciences, University of Sumatera utara and the Laboratory of Biochemistry, Veteriner Public Hall, ... -
Analisis Isi Lambung Ikan Haspora (Osteochillus waandersii) di Sungai Batang Toru Kabupaten Tapanuli Selatan
(Universitas Sumatera Utara, 2013)The analysis of stomach content of haspora fish (Osteochillus waandersii) has been studied from April until June 2013. The purpose of study is to determine the type of natural food of haspora fish in Batang Toru rivers. ... -
Struktur Komunitas Makrofauna Tanah pada Lahan Pertanian Anorganik dan Organik di Kabupaten Karo
(Universitas Sumatera Utara, 2014)This study was aimed to know about community structure of soil macrofauna in anorganic and organic farmland at Karo regency, was done in June 2013. The sampling point is determined using Purposive Random Sampling. ... -
Efek Waktu Radiasi Sinar Ultraviolet (UV) terhadap Morfologi Ikan Cupang (Betta splendens Regan) dan Gambaran Kariotipe
(Universitas Sumatera Utara, 2015)The effects of ultraviolet radiation to morphology of Betta splendensRegan and karyotype description has been studied. The objectives of study are to determine the time length of exposure to ultraviolet radiation can ... -
Gambaran Histologis Hepar Mencit Jantan (Mus musculus L) Strain DDW setelah Dipajankan Asap Rokok Elektrik dengan Rasa Gudang Garam dan Strawberry
(Universitas Sumatera Utara, 2014)A research has been conducted to study the influence of Gudang Garam and strawberry flavour electric cigarret to histologic structure of DDW strain male mice liver (Mus musculus L.). The experiment was carried out by ... -
Efek Hipoglikemia Ekstrak Etanol Biji Mahoni (Swietenia mahogani Jack.) dan Gambaran Mikrostruktur Limpa pada Mencit (Mus musculus L.) yang telah Diinduksi Diabetes dengan Aloksan
(Universitas Sumatera Utara, 2013)A research was conducted to investigate antidiabetic activity of ethanol extracts from the seed of mahogani (Swietenia mahogany Jack.) and microstruktur in the mice was inducted diabetic with alloxan. The experiment used ... -
Jenis dan Komposisi Komunitas Amfibi di Desa Batu Mbelin Kecamatan Sibolangit Kabupaten Deli Serdang Sumatera Utara
(Universitas Sumatera Utara, 2013)The research of “Species and Composition of Amphibian Community at Batu Mbelin Village, Sibolangit District of Deli Serdang, North Sumatra” has been conducted from June-July 2012. The research’s object was determine the ... -
Hubungan Kualitas Air dengan Struktur Komunitas Ikan di Sungai Buaya Kabupaten Sergai dan Kabupaten Deli Serdang Provinsi Sumatera Utara
(Universitas Sumatera Utara, 2014)The relationship between of water quality with structure of fish community in Buaya river, Sergai and Deli Serdang regency of North Sumatera was conducted on April to June 2013. The determination of sample location ... -
Uji Aktivitas Ekstrak Etanol Daun Seri (Muntingia calabura Linn.) dalam Menghambat Pertumbuhan Streptococcus mutans, Escherichia coli, dan Candida albicans secara in Vitro
(Universitas Sumatera Utara, 2016)A study about in vitro antimicrobial activity of etanol extract of cherry (Muntingia calabura Linn.) leaves against Streptococcus mutans, Escherichia coli, and Candida albicans has been done. The experimental design was ... -
Aspek Ekobiologi Ikan Bilih (Mystacoleucus padangesis) di Perairan Danau Toba Desa Pangururan Kabupaten Samosir
(Universitas Sumatera Utara, 2015)The Aspects Ecobiology Of ikan bilih (Mystacoleucus padangensis) in The Water of Lake Toba has been researched from July, 2014 to September, 2014. The purpose of this research was to determine the aspects ekobiologi ... -
Pengaruh Ekstrak Kulit Manggis (Garcinia mangostana L.) terhadap Hitung Leukosit dan Diferensiasi Leukosit Tikus (Rattus norvegicus L.) Jantan setelah Dipapari Kebisingan
(Universitas Sumatera Utara, 2015)Exposure to noise that exceeded the ability of adaptation can lead to various medical disorders, such as distress caused by stresses. Mangosteen peel extract contains active compounds that have pharmacological activity ... -
Isolasi dan Uji Kemampuan Antifungal Bakteri Endofit dari Tanaman Semangka terhadap Jamur Colletotrichum sp. Penyebab Penyakit Bercak Daun
(Universitas Sumatera Utara, 2014)A study on examination of endophytic bacteria in inhibiting Colletotrichum sp. causal agent of antrachnose disease in watermelon has been carried out. Endophytic bacteria were isolated from stems, leaves, roots of ... -
Hubungan Struktur Komunitas Ikan dengan Kualitas Air di Perairan Sungai Asahan Kabupaten Toba Samosir Provinsi Sumatera Utara
(Universitas Sumatera Utara, 2015)Corelation of structure of fish community to the water quality in Asahan river regency of Toba Samosir at North Sumatera has been studied. Three different study site was settle using purposive sampling method based on ... -
Keanekaragaman Makrozoobentos di Aliran Sumber Air Panas Sipoholon Kecamatan Sipoholon Kabupaten Tapanuli Utara
(Universitas Sumatera Utara, 2014)Research on " DIVERSITY OF MACROZOOBENTHOS AT SIPOHOLON HOT SPRING SOURCE IN NORTH TAPANULI’’has been carried out in March 2013. The station of Sample selected by purposive random sampling method . The Samples were ...