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  • Cereals  (2)
  • Allorosettenformation  (1)
  • Apoptosis  (1)
  • Coastal engineering  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Current genetics 15 (1989), S. 161-166 
    ISSN: 1432-0983
    Keywords: Double-stranded RNA ; dsRNA ; Mitochondria ; Stem rusts ; Leaf rusts ; Cereals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Double-stranded ribonucleic acids (dsRNA) were isolated from mitochondria in urediosporelings of three cereal stem rusts, Puccinia graminis f. sp. tritici, f. sp. secalis and f. sp. avenae, and two cereal leaf rusts, P. recondita f. sp. tritici and P. coronata f. sp. avenae, and analyzed by agarose gel electrophoresis. The double strandedness of the RNA molecules was characterized by nuclease treatments (RNase A, DNase 1 and S1 nuclease) and CF-11 cellulose column chromatography. No interspecific variation in multisegments of dsRNA was observed among races of each forma specialis. As to the interspecific variation, although each of three forma specialis of Puccinia graminis had similar dsRNA segments, 4.8, 5.0 and 5.2 kb, wheat leaf rust and oat crown rust had additional dsRNA segments of 2.7, 2.8, 5.8 and 6.0 kb. The presence of a dsRNA segment of 5 kb size in all isolates and species examined indicates that this unique segment can be a molecular marker for the rust family, Uredinales. Dot-blot hybridization indicated that there is no sequence homology between dsRNA segments and mitochondrial DNA.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1433-8580
    Keywords: Rat renal allograft ; GvHR ; allorosette ; blocking factor ; Rattennierentransplantation ; GvHR ; Allorosettenformation ; blockierender Serumfaktor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung 53 LBNF1-Nieren wurden auf L-Ratten transplantiert: 24 unbehandelte Empfänger überlebten durchschnittlich 16,1 ± 1,7 Tage. 14 Empfänger bekamen je 4 ml Alloantiserum (ADS, Gruppe 2), die restlichen 15 je 4 ml ALS (Gruppe 3). Davon überlebten 9 bzw. 10 Empfänger mehr als 4 Monate. Mit Milzzellen dieser permanent überlebenden 19 Ratten wurde eine GvHR durchgeführt. Grad und Index der GvHR ergaben eine normale, zellgebundene Immunantwort der Empfänger. Nach der Splenektomie erhielten sie erstmalig, 18 Tage später zum zweiten Mal Haut von LBNF1, 18 Tage danach Haut von LBufF1 transplantiert. Das erste Transplantat überlebte in der ADS-Gruppe 13,1 ± 1,9 Tage, in der ALS-Gruppe 12,2 ± 1,2 Tage. Das zweite wurde bei Gruppe 2 ebenfalls verzögert, bei Gruppe 3 fast gleich wie bei unbehandelten L-Ratten, das unspezifische Transplantat in beiden Gruppen regelrecht abgestoßen. Lymphozytotoxin und Hämagglutinin wurden vor und nach der Hauttransplantation bis zum 53. Tag nicht nachgewiesen. Die Seren beider Gruppen inhibierten die Allorosettenformation auf 46,0 ± 4,4% (ADS-Gruppen) bzw. 37,7 ± 9,2% (ALS-Gruppe), somit war ein blockierender FAktor im Serum der Empfänger vorhanden. Höchstwahrscheinlich hatten sich also bei diesen Empfängern nach der ALS-Therapie blockierende Antikörper gebildet, woraus sich ein Enhancement der Nierentransplantate entwickelte.
    Notes: Summary 53 LBNF1 kidneys were grafted into L-rats. 24 untreated recipients served as control and survived 16.1 ± 1.7 days. 14 recipients were treated with 4 ml alloantiserum (ADS) each, and the other 15 animals with 4 ml ALS each. 9 and 10 of these 14 and 15 animals survived for more than 4 months. We performed GvH-reaction with spleen cells of these 19 animals. It showed normal cellular immune response. After splenectomy first donor specific skin was transplanted, 18 days later second skin of same origin (LBNF1) and 18 days after third party skin (LBufF1). The first grafts survived 13.1 ± 1.9 days in the recipients of ADS treatment and 12.2 ± 1.2 days in the recipients of ALS. Second skin grafts were rejected delayed in the former recipients as the first grafts, in the later more accelerated than the first grafts. The third grafts survived as the controls. Before and after skin grafting we could not detect lymphocytotoxin and hemagglutinin. The sera of animals with ADS therapy inhibited the spontaneous allorosette formation to 46.0 ± 4.4% and of ALS therapy 37.7 ± 9.2%. Our results suggest that after ALS treatment blocking antibodies were produced in the recipients and they cause the enhancement of kidney allograft.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Current genetics 22 (1992), S. 101-105 
    ISSN: 1432-0983
    Keywords: Intergenic region ; Stem rusts ; Puccinia graminis ; Leaf rusts ; Cereals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Total genomic DNA was isolated from three cereal stem rusts, Puccinia graminis f. sp. tritici, f. sp. secalis, f. sp. avenae, and two cereal leaf rusts, P. recondita f. sp. tritici and P. coronata f. sp. avenae, and analyzed for the presence of heterogeneity in the intergenic region of the ribosomal DNA repeat unit. A 1 kb region of the repeat unit between the 26s and the 5s rRNA genes (IGR-1) was amplified by PCR and was found to be heterogeneous within each isolate and variable in size between races and species. The PCR results were confirmed by Southern blot analysis of native DNA. In an isolate of race C36(48), heterogeneity appeared to be due to variable numbers of 0.1 kb subrepeats in IGR-1. Nine wheat stem rust strains representing nine different races produced a unique pattern of heterogeneity while two different isolates of one race were identical, as were five of another. This may provide a rapid method for race identification in wheat stem rust. Heterogeneity and polymorphism in rye stem rust, oat stem rust, wheat leaf rust, and oat crown rust, was less pronounced than in wheat stem rust. In the course of this work, the 5s rRNA gene was located and its position and orientation within the ribosomal repeat unit was established.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Environmental management 11 (1987), S. 175-182 
    ISSN: 1432-1009
    Keywords: Seawalls ; Bulkheads ; Coastal protection ; Coastal engineering ; Storms
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Seacliff State Beach, along the shoreline of northern Monterey Bay, California, has a well-documented history of repeated destruction and reconstruction of seawalls and park facilities. Seven times in 60 years the timber seawall has been destroyed by winter storm waves and subsequently rebuilt. The deficiencies of the wall, including (a) inadequate attachment of timber lagging to pilings, (b) inability of pilings or lagging to withstand repeated impact of waves and logs, and (c) inadequate height and internal drainage system have never been adequately addressed and each successive wall has essentially been identical to the previously destroyed wall.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-1262
    Keywords: Keywords Nonsteroidal anti-inflammatory drugs ; Colon cancer ; Apoptosis ; Caspase ; Poly(ADP-ribose) polymerase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Epidemiological studies have demonstrated that nonsteroidal anti-inflammatory drugs (NSAIDs) decrease the incidence of and mortality from colon cancer. In addition, NSAIDs reduce the number and the size of polyps in patients with familial adenomatous polyposis. The mechanisms responsible for the antineoplastic effect of NSAIDs are not yet completely understood, but one of the possible mechanisms is an induction of apoptosis. We explored the role of caspase-3, a major apoptosis-executing enzyme, in NSAID-induced apoptosis of colon cancer cell line HT-29. Treatment of HT-29 cells with indomethacin induced a dramatic increase in caspase-3-like protease activity measured by a cleavage of the fluorogenic substrate Ac-DEVD-AMC. Western blot analysis showed that indomethacin treatment led both to decrease in pro-caspase-3 and to cleavage of its substrate poly(ADP-ribose) polymerase (PARP). Furthermore, the caspase- 3-like protease inhibitor Ac-DEVD-CHO attenuated indomethacin- induced DNA fragmentation dose dependently. However, mRNA expression of CASP genes was not affected by the addition of indomethacin, highlighting the importance of posttranslational modification of this enzyme for the activation. These results suggest that NSAIDs, including indomethacin, induce apoptosis in colon cancer cells through a caspase-3 dependent mechanism which may contribute to the chemopreventive functions of these agents.
    Type of Medium: Electronic Resource
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