Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 1 (1879), S. 279-279 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Surgical and radiologic anatomy 3 (1982), S. 13-16 
    ISSN: 1279-8517
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Conclusion Au terme de notre étude, nous constatons: - que les anastomoses macroscopiques entre l'artère ophtalmique et l'artère carotide externe au niveau de la face sont inconstantes et qu'elles semblent plus fréquentes du côté droit. - que nous avons retrouvé une bonne corrélation entre la fréquence anatomique de ces anastomoses et la fréquence d'inversion de leur sens circulatoire à l'examen Doppler, dans notre série de patients porteurs d'une thrombose de la carotide interne au cou.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Surgical and radiologic anatomy 3 (1982), S. 271-278 
    ISSN: 1279-8517
    Keywords: Ophthalmic artery ; External carotid artery ; Anastomoses ; Doppler
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Après injection au latex, nous avons étudié les anastomoses entre l'artère ophtalmique (a. ophtalmica) et les branches de la carotide externe (a. carotis externa) dans la région orbitaire (regio orbitalis). Nous n'avons retenu que les anastomoses macroscopiques qui peuvent éventuellement jouer un rôle de suppléance et être étudiées par examen Doppler. Nous avons constaté pour 60 hémifaces que les anastomoses étaient inconstantes. Nous avons donc étudié leur fréquence: pour l'artère faciale (a. facialis) elle est de 60%, pour l'artère temporale superficielle (a. temporalis superficialis) de 33% et pour l'artère infra-orbitaire (a. infraorbitalis) qui donne une anastomose indirecte de 37%. Nous avons étudié ensuite l'association de ces différentes anastomoses entre elles pour voir s'il existait un balancement dans leur présence ou si leur association était due au hasard. Nous avons constaté en outre que les anastomoses entre les branches de l'artère ophtalmique et les branches de l'artère carotide externe étaient nettement plus fréquentes du côté droit. Dans un dernier temps, nous avons comparé nos résultats anatomiques avec ceux d'une série d'examens Doppler qui étudiait l'inversion du sens circulatoire au niveau des différentes anastomoses de l'artère ophtalmique chez les sujets qui présentaient une thrombose unilatérale de l'artère carotide interne (a. carotis interna). Nous avons alors constaté qu'il existait une bonne corrélation entre nos résultats anatomiques et ceux observés après cet examen. Il y a cependant des différences qui peuvent s'expliquer par le petit nombre des sujets, par le calibre des vaisseaux, et peut-être aussi par le fait que chez certains sujets, le polygone de Willis (circulus arteriosus cerebri) était trés important. Dans une telle disposition, les anastomoses ne sont pas utiles cliniquement et il n'y a pas de renversement circulatoire.
    Notes: Summary Using latex injections we have studied the anastomoses between the ophthalmic artery (a. ophthalmica) and the branches of the external carotid (a. carotis exerna) in the orbital region (regio orbitalis). We have limited this report to the macroscopic anastomoses which have a functional supply and which are accessible to examination by the Doppler technique. After examination of 60 specimen pairs it is clear that most anastomoses were inconstant. We have thus recorded their frequency: for the facial artery (a. facialis) the frequency of anastomoses was 60%, for the superficial temporal artery (a. temporalis superficialis) it was 33%, for the infraorbital artery (a. infraorbitalis) anastomoses were present in 37%. We have furthermore studied the association between the different anastomoses to establish whether their relationship to one another was organized or simply random. We found that the anastomoses between the branches of the opthalmic artery and those of the external carotid artery were much more frequent on the right side. Finally, we have compared our anatomical results with those of a series of Doppler examinations designed to detect reversal of the circulation at the level of different anastomoses of the ophthalmic artery in subjects who presented with unilateral thrombosis of the internal carotid artery (a. carotis interna). This study revealed a good correlation between the anatomical findings and those observed on Doppler examination. There are however differences which can be explained by the small number of subjects examined, by the calibre of the vessels and also by the fact that in certain subjects, the circle of Willis (circulus arteriosus cerebri) was particularly well-developed. In such circumstances the anastomoses were not clinically functional and there was no reversal of blood flow within them.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Ornithine transcarbamylase (OTC) deficiency is the most common inborn error of the urea cycle in humans and is responsible for lethal neonatal hyperammonemia in males. Partial OTC deficiency also occurs in females and can be responsible for life-threatening hyperammonemic comas in heterozygotes. The cosegregation of the trait with a 5.8-kb abnormal MspI fragment in an affected family led us to hypothesize that this unexpected migration pattern was related to the mutation event in this particular family. Using polymerase chain reaction amplification of the specific mRNA derived from a post-mortem biopsy of the liver, we found that the MspI site located in the seventh exon of the gene was abolished and we finally identified a C-to-T transition at codon 225 of the cDNA, changing a proline to a leucine in the protein. Subsequent digestion of amplified exon 7 using the restriction enzyme MspI allowed direct screening for the mutant genotype during the next pregnancy. The present study supports the view that direct detection of the mutant genotype using either Southern blotting or digestion of amplified exons of the gene can contribute to genetic counselling in non-informative families. Finally, since MspI digestions are routinely performed for restriction fragment length polymorphism-based family studies in OTC deficiency, we suggest that the possible presence of the 5.8-kb abnormal fragment should be investigated on Southern blots of affected individuals.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Archives of microbiology 173 (2000), S. 1-9 
    ISSN: 1432-072X
    Keywords: Key words Metal ion transport ; ABC transporter ; Permease family ; Metalloregulatory protein ; Nickel-containing enzymes ; Metal resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The transition metal Ni is an essential cofactor for a number of enzymatic reactions in both prokaryotes and eukaryotes. Molecular analyses have revealed the existence of two major types of high-affinity Ni2+ transporters in bacteria. The Nik system of Escherichia coli is a member of the ABC transporter family and provides Ni2+ ion for the anaerobic biosynthesis of hydrogenases. The periplasmic binding protein of the transporter, NikA, is likely to play a dual role. It acts as the primary binder in the uptake process and is also involved in negative chemotaxis to escape Ni overload. Expression of the nik operon is controlled by the Ni-responsive repressor NikR, which shows functional similarity to the ferric ion uptake regulator Fur. The second type of Ni2+ transporter is represented by HoxN of Ralstonia eutropha, the prototype of a novel family of transition metal permeases. Members of this family have been identified in gram-negative and gram-positive bacteria and recently also in a fission yeast. They transport Ni2+ with very high affinity, but differ with regard to specificity. Site-directed mutagenesis experiments have identified residues that are essential for transport. Besides these uptake systems, different types of metal export systems, which prevent microorganisms from the toxic effects of Ni2+ at elevated intracellular concentrations, have also been described.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 8
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 9
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 157 (1988), S. 1309-1315 
    ISSN: 0006-291X
    Keywords: [abr] Denhardt's solution; ficoll 0.02%, polyvinylpyrrolidone 0.02%, ; [abr] Kb; kilobase pairs ; [abr] SDS; sodium dodecyl sulfate ; [abr] SSC; 0.15 M NaCl, 0.15 M Na-Citrate ; [abr] The abbreviations used are: AspAT; aspartateaminotransferase ; [abr] cAspAT; cytosolic aspartate aminotransferase ; [abr] mAspAT; mitochondrial aspartate aminotransferase ; [abr] pre-mAspAT; precursor of mitochondrial aspartate aminotransferase
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 10
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 103 (1981), S. 1044-1051 
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...