Viser treff 2211-2230 av 32764

    • Background and design. Report no 1. 

      Stangvik, Gunnar (Research report; Forskningsrapport, 2002)
    • BacklinkDB: A Purpose-Built Backlink Database Management System 

      Jørgensen, Marius Løvold (Master thesis; Mastergradsoppgave, 2023-02-15)
      In order to compile a list of all the backlinks for a given webpage, we need knowledge about all the outgoing links on the web. Traversing the web and storing all the backlink data in a database allows us to efficiently retrieve the list of backlinks for a web page on demand. However, the web consists of billions of backlinks which translates to terabytes of data. As the web is continuously evolving, ...
    • Backpropagation Neural Networks for Facial Recognition 

      Solheim, Inger (Master thesis; Mastergradsoppgave, 1991-12)
      A survey was conducted testing the aptitude of neural networks to recognize human faces. The motivation for this a study is the possibility of designing automatic security systems. Pictures of 511 subjects were collected. The pictures captured both profiles and many natural expressions of the subject. Some of the subjects were wearing glasses, sunglasses or hats in some of the pictures. The images ...
    • The Backward-Bending Supply Curve in Fisheries-Revisited 

      Pham, Thanh Thuy; Flaaten, Ola (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      This study discusses and estimates the backward-bending supply curve, using data for three years over a six-year time span from the inshore purse seine fishery in Khanh Hoa province, Vietnam. Four different models are developed for estimation based on fisheries data, in the absence of stock survey data. The estimated maximum sustainable yield for the anchovy in south-central Vietnam ranges from ...
    • Bacterial diversity in faeces from polar bear (Ursus maritimus) in Arctic Svalbard 

      Glad, Trine; Brusetti, Lorenzo; Aars, Jon; Bernhardsen, Pål; Nielsen, Kaare Magne; Andersen, Magnus; Sundset, Monica Alterskjær (Journal article; Tidsskriftartikkel; Peer reviewed, 2010)
      Background Polar bears (Ursus maritimus) are major predators in the Arctic marine ecosystem, feeding mainly on seals, and living closely associated with sea ice. Little is known of their gut microbial ecology and the main purpose of this study was to investigate the microbial diversity in faeces of polar bears in Svalbard, Norway (74-81 degrees N, 10-33 degrees E). In addition the level of blaTEM ...
    • Bacterial Diversity in the Digestive Tracts of Four Indian Air-Breathing Fish Species Investigated by PCR Based Denaturing Gradient Gel Electrophoresis 

      He, Suxu; Zhou, Zhigang; Banerjee, Goutam; Huang, Lu; Ray, Arun Kumar; Ringø, Einar (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-12-02)
      An investigation was conducted to identify the allochthonous microbiota (entire intestine) and the autochthonous microbiota in proximal intestine (PI) and distal intestine (DI) of four species of Indian air-breathing fish (climbing perch; Anabas testudineus, murrel; Channa punctatus, walking catfish; Clarias batrachus and stinging catfish; Heteropneustes fossilis) by PCR based denaturing gradient ...
    • Bacterial diversity of aMasi, a South African fermented milk product, determined by clone library and denaturing gradient gel electrophoresis analysis 

      Osvik, Renate Døving; Sperstad, Sigmund; Breines, Eva Marie; Hareide, ellinor; Godfroid, Jacques; Zhou, Zhigang; Ren, Pengfei; Geoghegran, Claire; Holzapfel, Wilhelm; Ringø, Einar (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      In the present study, we investigated the bacterial diversity of aMasi, a traditional South African fermented milk product, by 16S rRNA clone library and Denaturing Gradient Gel Electrophoresis (DGGE) analysis. Two hundred and eighty two clones from clone library were isolated and identified from aMasi, prepared from the milk of four cows from one herd in the EkuPindiseni Community, North West of ...
    • Bacterial evolution on demand 

      Johnsen, Pål Jarle; Gama, João Alves; Harms, Klaus (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-04-06)
      Bacteria carry antibiotic resistant genes on movable sections of DNA that allow them to select the relevant genes on demand.
    • Bacterial Extracellular vesicles and their cargo 

      Joshi, Bishnu (Doctoral thesis; Doktorgradsavhandling, 2021-02-05)
      <i>Staphylococcus aureus</i> and <i>Enterococcus faecium</i> are opportunistic pathogens that may cause diseases ranging from minor skin infection to severe blood stream infections. The emergence of methicillin-resistant <i>Staphylococcus aureus</i> (MRSA) and vancomycin-resistant enterococcal strains severely limits treatment options. Bacteria release extracellular vesicles (EVs), defined as ...
    • Bacterial extracellular vesicles: towards realistic models for bacterial membranes in molecular interaction studies by surface plasmon resonance 

      Brilkov, Maxim; Stenbakk, Victoria; Jakubec, Martin; Vasskog, Terje; Kristoffersen, Tone; Cavanagh, Jorunn Pauline; Ericson, Johanna Ulrica; Isaksson, Johan Mattias; Flaten, Gøril Eide (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-12-13)
      One way to mitigate the ongoing antimicrobial resistance crisis is to discover and develop new classes of antibiotics. As all antibiotics at some point need to either cross or just interact with the bacterial membrane, there is a need for representative models of bacterial membranes and efficient methods to characterize the interactions with novel molecules -both to generate new knowledge and to ...
    • Bacterial flagellin : a novel adjuvant for vaccine strategies 

      Hynes, Natasha (Doctoral thesis; Doktorgradsavhandling, 2011-10-18)
      Flagellin is the principal structural protein in the locomotive organ flagellum present on flagellated bacteria, and is known to be an important evolutionarily conserved PAMP. Flagellin has been shown to bind to the PRR TLR5 which induces innate immune system responses and signaling pathways. In mammals, much focus has been placed on this protein in vaccine studies for its possible function as an ...
    • Bacterial genomic epidemiology with mixed samples 

      Mäklin, Tommi; Kallonen, Teemu; Alanko, Jarno; Samuelsen, Ørjan; Hegstad, Kristin; Mäkinen, Veli; Corander, Jukka; Heinz, Eva; Honkela, Antti (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-11-15)
      Genomic epidemiology is a tool for tracing transmission of pathogens based on whole-genome sequencing. We introduce the mGEMS pipeline for genomic epidemiology with plate sweeps representing mixed samples of a target pathogen, opening the possibility to sequence all colonies on selective plates with a single DNA extraction and sequencing step. The pipeline includes the novel mGEMS read binner for ...
    • Bacterial interference with canonical NF kappa B signalling 

      Johannessen, Mona; Askarian, Fatemeh; Sangvik, Maria; Sollid, Johanna U. Ericson (Journal article; Tidsskriftartikkel; Peer reviewed, 2013-10)
    • Bacterial leakage in ex vivo teeth after apicoectomy using two tricalsium silicate-based cements as root-end filling materials 

      Tinnan, Tamar; Nergård, Siril; Ellingsen, Siri (Master thesis; Mastergradsoppgave, 2014)
      Abstract Background The main cause of pulpal and periradicular pathosis are microorganisms and their by products in the root canal system. These have to be eliminated to promote healing. Because it´s impossible to achieve a bacteria-free root canal an additional goal of endodontic therapy is to seal the root canal system from the outside environment. Today the standard method for filling the ...
    • The bacterial magnesium transporter MgtA reveals highly selective interaction with specific cardiolipin species 

      Weikum, Julia; van Dyck, Jeroen F.; Subramani, Saranya; Klebl, David P.; Storflor, Merete; Muench, Stephen P.; Abel, Sören; Sobott, Frank; Morth, Jens Preben (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-23)
      The bacterial magnesium transporter A (MgtA) is a specialized P-type ATPase important for Mg<sup>2+</sup> import into the cytoplasm; disrupted magnesium homeostasis is linked to intrinsic ribosome instability and antibacterial resistance in Salmonella strains. Here, we show that MgtA has functional specificity for cardiolipin 18:1. Still, it reaches maximum activity only in combination with ...
    • Bacterial membrane-derived vesicles attenuate vancomycin activity against methicillin-resistant staphylococcus aureus 

      Kumaraswamy, Monika; Wiull, Kamilla; Joshi, Bishnu; Sakoulas, George; Kousha, Armin; Vaaje-Kolstad, Gustav; Johannessen, Mona; Hegstad, Kristin; Nizet, Victor; Askarian, Fatemeh (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-09-29)
      Methicillin-resistant Staphylococcus aureus (MRSA) has evolved numerous antimicrobial resistance mechanisms and is identified as a serious public health threat by the World Health Organization and U.S. Centers for Disease Control and Prevention. The glycopeptide vancomycin (VAN) remains a cornerstone of therapy for severe MRSA infections despite increasing reports of therapeutic failure in hospitalized ...
    • The Bacterial Microbiome in the Small Intestine of Hooded Seals (Cystophora cristata) 

      Acquarone, Mario; Salgado-Flores, Alejandro; Sundset, Monica Alterskjær (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-10-27)
      Arctic hooded seals (Cystophora cristata) are monogastric carnivores that go through extreme fasting and re-feeding in early life. They are born isolated on sea ice; suckle high-fat milk for four days and may then fast for up to one month before they start hunting and feeding on small prey (fish and crustaceans). Previous studies of the gut microbiota in pinnipeds have focused on the large intestine, ...
    • Bacterial Natural Product Drug Discovery for New Antibiotics: Strategies for Tackling the Problem of Antibiotic Resistance by Efficient Bioprospecting 

      Schneider, Yannik Karl-Heinz (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-07-10)
      The problem of antibiotic resistance has become a challenge for our public health and society; it has allowed infectious diseases to re-emerge as a risk to human health. New antibiotics that are introduced to the market face the rise of resistant pathogens after a certain period of use. The relatively fast development of resistance against some antibiotics seems to be closely linked to their microbial ...
    • Bacterial response to permafrost derived organic matter input in an Arctic fjord 

      Müller, Oliver; Seuthe, Lena; Bratbak, Gunnar; Paulsen, Maria Lund (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-08-06)
      The warming of the Arctic causes increased riverine discharge, coastal erosion, and the thawing of permafrost. Together, this is leading to an increased wash out of terrestrial dissolved organic matter (tDOM) into the coastal Arctic ecosystems. This tDOM may be anticipated to affect both carbon and nutrient flow in the microbial food web and microbial community composition, but there are few ...
    • A bacteriocin-based treatment option for Staphylococcus haemolyticus biofilms 

      Kranjec, Christian; Kristensen, Sofie S.; Bartkiewicz, Karolina T.; Brønner, Mikkel; Cavanagh, Jorunn P.; Srikantam, Aparna; Mathiesen, Geir; Diep, Dzung B. (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-07-06)
      Bacteriocins are ribosomally-synthesized antimicrobial peptides, showing great potential as novel treatment options for multidrug-resistant pathogens. In this study, we designed a novel hybrid bacteriocin, Hybrid 1 (H1), by combing the N-terminal part and the C-terminal part of the related bacteriocins enterocin K1 (K1) and enterocin EJ97 (EJ97), respectively. Like the parental bacteriocins, H1 used ...