Refine
Has Fulltext
- yes (53)
Is part of the Bibliography
- yes (53)
Year of publication
- 1982 (53) (remove)
Document Type
- Journal article (45)
- Book (3)
- Book article / Book chapter (3)
- Jahresbericht (1)
- Conference Proceeding (1)
Keywords
- Anorganische Chemie (4)
- Chemie (4)
- Biochemie (3)
- Organische Chemie (3)
- Differential effects of stressors (2)
- Healthy subjects (2)
- Physiologische Chemie (2)
- Psychologie (2)
- Tranquillizer (2)
- X-ray (2)
Institute
- Theodor-Boveri-Institut für Biowissenschaften (16)
- Institut für Anorganische Chemie (10)
- Institut für Psychologie (bis Sept. 2007) (5)
- Institut für Organische Chemie (4)
- Institut für Molekulare Infektionsbiologie (3)
- Neurochirurgische Klinik und Poliklinik (3)
- Institut für Altertumswissenschaften (bis Sept. 2007) (2)
- Institut für Pharmakologie und Toxikologie (2)
- Institut für Psychologie (2)
- Institut für deutsche Philologie (1)
Schriftenreihe
- Grundzüge ; 45 (1)
Kommentierte Bibliographie englischer literarischer Testamente vom 14. bis zum 20. Jahrhundert
(1982)
No abstract available
We have cloned the chromosomal hemolysin determinants from Escherichia coli strains belonging to the four O-serotypes 04, 06, 018, and 075, The hemolysin-producing clones were isolated from gene banks of these strains which were constructed by inserting partial Sau3A fragments of chromosomal DNA into the cosmid pJC74. The hemolytic cosmid clones were relatively stable. The inserts were further sub cloned either as Sail fragments in pACYC184 or as BamHI-SaLI fragments in a recombinant plasmid (pANN202) containing cistron C (hlye) of the plasmid-encoded hemolysin determinant. Detailed restriction maps of each of these determinants were constructed, and it was found that, despite sharing overall homology, the determinants exhibited minor specific differences in their structure, These appeared to be restricted to cistron A (hlyA), which is the structural gene for hemolysin. In the gene banks of two of these hemolytic strains, we could also identify clones which carried the genetic determinants for the mannose-resistant hemagglutination antigens Vb and VIc. Both of these fimbrial antigens were expressed in the E. coli K-12 clones to an extent similar to that observed in the wild-type strains. These recombinant cosmids were rather unstable, and, in the absence of selection, segregated at a high frequency.
Die Kristallstruktur von 4.CH\(_3\)(C\(_6\)H\(_4\))-TI(S\(_2\)CN(C\(_2\)H\(_5\))\(_2\))\(_2\) (P2\(_1\)/c, a = 11,973(3) A, b = 10,692(3) A, c = 19,232(4) A, ß = 114,02(2)°, Z = 4) und C\(_6\)H\(_5\)-Bi(S\(_2\)COCH\(_3\))\(_2\) (P2\(_1\)/c, a = 6,395(2) A, b = 24,684(8) A, c = 9,732(3) A, ß = 101,38(3)°, Z = 4) konnte aus Röntgendiffraktometerdaten von Einkristallen ermittelt werden. Die interatomaren Abstände zeigen daß, die Koordination von Dithiocarbamat und Xanthogenat an die Metallatome wie schon vermutet stark asymmetrisch zweizähnig und ausschließlich über Schwefel erfolgt. Die Koordinationsunter· schiede zwischen Bismut und Thallium ergeben ein deutliches Indiz für die "stereochemische Aktivität" des freien Elektronenpaares am Bismutatom.
No abstract available
No abstract available
No abstract available
No abstract available
The role of macrophages in primary and secondary infection of mice with Salmonella typhimurium
(1982)
Elimination of macrophages with high-molecular dextran sulphate (OS) markedly impairs resistance of mice to primary infection with smooth, virulent strains of Salmonella typhimurium, whereas stimulation of this system by killed Bordetella pertussis organisms increases resistance. In infection with rough, avirulent strains of S. iyphimurium the elimination of macro phages was not followed by an essential loss of resistance, and it appears that other non-specific defence mechanisms, for example the complement system, may have compensated for the lack of macrophages. Macrophages, therefore, play an important role in defence during primary infection with virulent strains. In immunity to challenge infection with S. typhimurium, macrophages play an even more significant role. Treatment with OS completely removes immunity, and both humoral and cell-mediated immune mechanisms seem to require the participation of macrophages.
No abstract available
While clear evidence exists for the direct involvement of cytolysins in the pathogenesis of Gram-positive bacteria, the significance of Gram-negative haemolysins remains unclear. This paper presents briefly data indicating a role for haemolysin production in infections caused by Escherichia coli and also experiments which have allowed an analysis of the molecular basis of the haemolysis among pathogenic and non-pathogenic strains of this species.
In an experimental analog of verbal examinations, the call-up situation, the effects of two dosages of a tranquillizing agent (lopirazepam) are compared to placebo treatment. 72 male and female, healthy, young volunteers have been randomly assigned to 12 groups of 6 subjects each. Pulse frequency and performance were registered. The results indicated differential drug effects which were interpreted according to the hypotheses of "differential effects of social stressors". If a situation was highly challenging for a subject, the application of a tranquillizer in an adequately high dosage enabled him to perform well in spite of or because of strong increases in pulse frequency.
In an experimental analog of verbal examinations, the call-up situation, the effects of two dosages of a tranquillizing agent (lopirazepam) are compared to placebo treatment. 72 male and female, healthy, young volunteers have been randomly assigned to 12 groups of 6 subjects each. Pulse frequency and performance were registered. The results indicated differential drug effects which were interpreted according to the hypotheses of "differential effects of social stressors". If a situation was highly challenging for a subject, the application of a tranquillizer in an adequately high dosage enabled him to perform well in spite of or because of strong increases in pulse frequency.
7-Thiatetracyclo[4.1.0.0\(^{2,4}\).0\(^{3,5}\)]heptan (Benzvalensulfid) - Synthese und Reaktionen
(1982)
No abstract available
The actions of adenosine on histamine release of human lung fragments were investigated. Histamine release was stimulated either with the calcium ionophore A 23187 orwith concanavalin A. Adenosine and its analogue 5'-N-ethylcarboxamidoadenosine alone had no significant effect on basal release or on the release elicited by A 23187 or concanavalin A. However, in the presence of the adenosine receptor antagonist 8-[4-[[[[(2-aminoethyl)amino]-carbonyl] methyloxy]-phenyl]-1,3-dipropylaxanthine (XAC), which itself did not affect the release, adenosine increased the stimulated histamine release. On the other hand, in the presence of the nucleoside transport inhibitor S-(p-nitrobenzyl)-6-thioninosine (NBTI), adenosine caused a reduction in stimulated histamine release. NBTI itself caused a stimulation of release. Thus, a stimulatory effect of adenosine was seen in the presence ofXAC, whereas an inhibitory effect was unmasked by NBTI. From these data it is concluded that adenosine exerts two opposing effects on histamine release in the human lung which neutralize each other: it inhibits release via a si te antagonized by XAC, which presumably represents an A2 adenosine receptor, and it stimulates release via a mechanism that is blocked by NBTI, suggesting that adenosine needs to reach the interior of cells to exert this effect. The slight stimulatory effect of NBTI alone demonstrates that trapping intracellularly formed adenosine inside mast cells leads to sufficient concentrations of adenosine to stimulate histamine release. These findings suggest an important bimodal role of adenosine in regulating histamine release in the human lung.