Sökning: "Downstream region"

Visar resultat 1 - 5 av 137 avhandlingar innehållade orden Downstream region.

1. 1. Studies on translation initiation and gene expression in Escherichia coli

   Författare :Ernesto I. Gonzalez de Valdivia; Leif Isaksson; Stephen Douthwaite; Stockholms universitet; []
   Nyckelord :Downstream region; NGG codons; abortive translation; drop-off; Shine-Dalgarno sequence; gene expression and Escherichia coli; NATURAL SCIENCES; NATURVETENSKAP;

   Sammanfattning : In prokaryotes, several mRNA sequences surrounding the initiation codon have been found to influence the translation process; these include the downstream region and its codon context, the Shine-Dalgarno sequence and the S1 ribosomal protein-binding site. In this thesis, the purpose has been to study the role of the downstream region and Shine-Dalgarno-like sequences on early translation elongation and gene expression in Escherichia coli. LÄS MER

3. 2. Structural and Genetic Studies of Translation in Escherichia coli

   Författare :Qing Zhao; Leif Isaksson; Lars-Göran Öfverstedt; Odd Nygård; Stockholms universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; electron tomography; ribosome; 30S subunit; 50S subunit; rifampicin; Escherichia coli; Translation initiation; Initiation codon; Downstream Region DR ; Microbiology; immunology; infectious diseases; Mikrobiologi; immunologi; infektionssjukdomar;

   Sammanfattning : Ribosomes are the universal ribonucleoprotein organelles that translate the genetic message from mRNA to protein. In prokaryotes, the ribosomal subunits are 30S and 50S subunit, which bind together during the translation process forming 70S ribosome. LÄS MER

4. 3. Experimental Investigations of Heat Transfer in a Channel with Ribs and Obstacle

   Författare :Zahra Ghorbani-Tari; Värmeöverföring; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Liquid crystal thermography; ribs; entrance region; control the heat transfer around an obstacle by rib;

   Sammanfattning : This thesis presents experimental investigations of local heat transfer in a rectangular channel (aspect ratio AR = 4) with continuous transverse ribs as well as an obstacle. Liquid crystal thermography (LCT) is employed to obtain the temperature fields in the heat transfer experiments. LÄS MER

5. 4. Impacts of climate change on surface hydrology in the source region of the Yellow River

   Författare :Feifei Yuan; Avdelningen för Teknisk vattenresurslära; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Source region of the Yellow River; climate change; summer precipitation; ENSO; teleconnection pattern; sea surface temperature; Xinanjiang model; Rainfall-Runoff process;

   Sammanfattning : The source region of the Yellow River contributes about 35% of the total water yield in the Yellow River basin playing an important role for meeting the downstream water resources requirements. The declining water availability caused by climate change in the source region of the Yellow River is expected to have severe repercussions for the 110 million basin inhabitants in terms of water resources affecting agricultural productivity, municipal, and industrial water supply. LÄS MER

7. 5. Migration in anadromous brown trout

   Författare :David Aldvén; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Downstream migration; Temperature; Discharge; Genetics; Growth rate; Climate change; Salmo trutta; Salmo salar; Sea trout; Salmon; Biology; Ecology;

   Sammanfattning : This thesis investigates the anadromous migration of brown trout (Salmo trutta) with the overall aim to improve stock management within the region. Several field studies were conducted in different streams and coastal areas on the west coast of Sweden specifically aimed to evaluate environmental triggers for migration (Paper I), migration pathways and strategies (Paper III and IV) as well as the genetic differentiation of anadromous populations of brown trout (Paper V). LÄS MER