Sökning: "Per M Hellström"

Visar resultat 1 - 5 av 6 avhandlingar innehållade orden Per M Hellström.

  1. 1. Effects of Orexins, Guanylins and Feeding on Duodenal Bicarbonate Secretion and Enterocyte Intracellular Signaling

    Författare :Magnus Wilhelm Bengtsson; Gunnar Flemström; Olof Nylander; Karl E. O. Åkerman; Per M. Hellström; Uppsala universitet; []
    Nyckelord :Physiology; alkaline secretion; carbohydrates; central nervous system; cholinergic stimulation; duodenum; enteric nervous system; enterochromaffin cell; fasting; feeding; glucose; guanylyl cyclase C; humans; hypocretin; intra-arterial; in situ; intracerebroventricular; luminal acid; luzindole; orexin-B; SB-334867; Fysiologi;

    Sammanfattning : The duodenal epithelium secretes bicarbonate ions and this is regarded as the primary defence mechanism against the acid discharged from the stomach. For an efficient protection, the duodenum must also function as a sensory organ identifying luminal factors. LÄS MER

  3. 2. Gut peptides in gastrointestinal motility and mucosal permeability

    Författare :Md. Abdul Halim; Webb Dominic-Luc; Per M Hellström; Lars Fändriks; Uppsala universitet; []
    Nyckelord :Gut regulatory peptides; Neuropeptides; Gastrointestinal mucosal permeability; Gastrointestinal motility; GLP-1; NPS; ROSE-010;

    Sammanfattning : Gut regulatory peptides, such as neuropeptides and incretins, play important roles in hunger, satiety and gastrointestinal motility, and possibly mucosal permeability. Many peptides secreted by myenteric nerves that regulate motor control are also produced in mucosal epithelial cells. LÄS MER

  4. 3. The Duodenal Mucosal Bicarbonate Secretion : Role of Melatonin in Neurohumoral Control and Cellular Signaling

    Författare :Markus Sjöblom; Gunnar Flemström; Olof Nylander; Karl EO Åkerman; Per M. Hellström; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Physiology; alkaline secretion; central nervous system; duodenal enterocyte; duodenal ulcer; duodenum; enterochromaffin cell; human; intraarterial; intracellular calcium; intracerebroventricular; melatonin; rat; vagal nerve; Fysiologi; Physiology; Fysiologi;

    Sammanfattning : The duodenal lumen is exposed to aggressive factors with a high potential to cause damage to the mucosa. Bicarbonate secretion by the duodenal mucosa is accepted as the primary important defense mechanism against the hydrochloric acid intermittently expelled from the stomach. LÄS MER

  5. 4. Ge/high-k Gates for Monolithic 3D Integration

    Författare :Laura Zurauskaite; Per-Erik Hellström; Mikael Östling; Francois Andrieu; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Germanium; high-k; monolithic; 3D; germanium on insulator; GOI; germanium oxide; GeOx; Si-cap; Si-passivation; interface state density; Dit; low temperature; MOSFET; germanium; hög-permittivitetsdielektrika; monolitisk; 3D; germaniumpå- isolator; GOI; germaniumoxid; GeOx; kiselskikt; kiselpassivering; gränssnittsfälltäthet; Dit; låg temperatur; MOSFET; Informations- och kommunikationsteknik; Information and Communication Technology;

    Sammanfattning : Continuous scaling of transistor dimensions has been in the heart of semiconductorindustry for many years. Recently the scaling has been enabled by various performance boosters which resulted in increased processing complexity and cost, forcing the chip manufacturers to look for some alternative solutions. LÄS MER

  7. 5. Physiological and pathophysiological cerebrovascular regulation monitored by transcranial doppler

    Författare :Gunnar Hellström; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Transcranial Doppler ultrasonography (TCD) became available in the middle of the 1980s as a new technique for examining cerebral circulation. With this technique it is possible to measure the velocity of blood flow in major cerebral arteries. LÄS MER