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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Anatomy and embryology 125 (1966), S. 276-293 
    ISSN: 1432-0568
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Zusammenfassung Es wurde die Gaumensegelmuskulatur von Hund, Schwein, Rind und Pferd untersucht und mit der anderer Säugetiere und des Menschen verglichen. Dadurch konnten die bisherigen lücken- und fehlerhaften Schilderungen der Gaumensegelmuskulatur der Haussäugetiere ergänzt und ausgeglichen werden. Trotz größerer Unterschiede im Verhalten der einzelnen Muskeln ergab sich, daß die Gaumensegelmuskulatur der untersuchten Haussäugetiere einem allgemeinen Bauprinzip folgt. So besitzen auch Hund, Schwein, Rind und Pferd einen M. uvulae, dessen Ausbildung also nicht mit dem Vorhandensein oder Fehlen eines Zäpfchens im Zusammenhang steht. Der M. uvulae der Haussäugetiere ist ebenso wie alle übrigen an der Bildung der muskulösen Grundlage des Gaumensegels beteiligten Muskeln (die Mm. palatopharyngeus und levator veli palatini, der im Gaumensegel nur mit sehnigen Anteilen vertretene M. tensor veli palatini und die nur in geringem Maße mit dem Gaumensegel in Verbindung stehenden Mm. pterygopharyngeus und stylopharyngeus aboralis) paarig, wobei dieses Verhalten allerdings durch eine unterschiedlich starke Verschmelzung aufgehoben sein kann. Den vielfach beschriebenen „M. palatinus” gibt es nicht.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 63 (1985), S. 711-717 
    ISSN: 1432-1440
    Keywords: Alpha-1-microglobulin ; Beta-2-microglobulin ; Proteinuria ; Renal insufficiency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Alpha-1-microglobulin (alpha-1-m) is a low molecular weight glycoprotein (mw 25–33 KD) that is filtered through the glomeruli and reabsorbed in the proximal parts of the renal tubules where it is catabolized. Normal ranges were established for alpha-1-m (100 healthy controls) in serum (20–42 mg/l) and urine (3.5–8 mg/l). Alpha-1-m was then measured in 341 urine samples whose protein pattern had been classified as “pathologic” and “normal” according to microelectrophoresis. Increased alpha-1-m concentrations were found in 266 out of 280 pathologic urines (5% false negative) and in 3 out of 61 normal urines (4% false positive). Beta-2-microglobulin (beta-2-m), total protein or protein test strips showed a poorer correlation to the electrophoretic results. Measurement of alpha-1-m is, therefore, the most sensitive of these methods for the detection of proteinuria. In 90 patients with low molecular weight proteinuria and either with or without renal insufficiency alpha-1-m concentrations were determined in both urine and serum. While all patients had elevated urinary alpha-1-m concentrations, increased serum values were only found in renal insufficiency (Ccrea〈100 ml/min). Independently of these results, we were also able to establish that increased alpha-1-m levels are found at decreased glomerular filtration rates (Ccrea 〈70 ml/min). Pathologic alpha-1-m concentrations therefore only allow the conclusion of isolated tubular impairment when the GFR is greater than 70 ml/min. Data from 350 patients with various renal and hypertensive diseases showed that serum alpha-1-m is a more sensitive indicator of renal insufficiency, even in the so-called “creatinine blind” range (60–100 ml/min) of the GFR than either creatinine or beta-2-m.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 0378-1119
    Keywords: Gram-negative bacteria ; IncQ and IncP plasmids ; Recombinant DNA ; high-level expression of transfer gene products ; mobilization
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 0378-1119
    Keywords: DNA replication ; Recombinant DNA ; antibiotic resistance ; bacteriophages λ, T7, M13 ; conjugative transfer ; incompatibility group Q ; open reading frame
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 326 (1970), S. 255-261 
    ISSN: 1435-2451
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 492-493 (Aug. 2005), p. 39-46 
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Highly porous open- cell materials on the base of various metals and alloys are of increasing interest as they combine structural and functional properties. There is a wide range of possible applications for such materials, e.g. as heat exchangers, filters or catalysts. A new and promising method to produce open- cell metallic foams on base of iron powder, low and high alloyed steel powders as well as nickel alloypowder is the SlipReactionFoamSintering (SRFS)- process. In comparison to other production processes of metallic foams, the SRFS- process provides several advantages: foaming at room temperature, allowing a very good process control by various parameters, foams of a great variety of metals are possible and a broadspectrum of properties is achievable
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Archives of gynecology and obstetrics 214 (1973), S. 104-105 
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung In einer Gewebekultur einer männlichen Erdmaus (Microtus agrestis) wurde die Umwandlung der ursprünglich überwiegend diploiden Zellpopulation in eine Kultur mit 85% triploiden Zellen beobachtet. Die Ploidieänderung trat zwischen dem 8. und 11. Kulturmonat auf. Es konnten zwei triploide Zellinien unterschieden und isoliert werden, eine mit dem Karyotyp 3n,XYY, die andere mit 3n,XYY. Außerdem wurden in dieser Kultur diploide Zellen mit zwei X-oder zwei Y-Chromosomen gefunden, mit einer Häufigkeit von etwa 1%. Ebenso traten haploide, tetraploide, hexaploide und octoploide Mitosen auf. Durch Kombination von Pulsmarkierung mit 3H-Thymidin und Bestimmung des relativen DNS-Gehalts wurden die DNS-Replikationsmuster triploider Zellen während der S-Periode untersucht. Die mittlere Dauer der G2-Periode triploider Zellen erwies sich als um etwa 1 Std länger als die G2-Periode diploider Zellen, dagegen um 15 min kürzer als bei tetraploiden Zellen. Die Bedeutung multipolarer Mitosen für die Bildung triploider Zellen und diploider Zellen mit 2 X-oder 2 Y-Chromosomen wird diskutiert.
    Notes: Summary In a tissue culture of male Microtus agrestis, transformation of the originally predominantly diploid cells to a population with 85% triploid cells was observed. The change from diploid to triploid occurred between the 8th and 11th month of tissue culture. Two triploid cell lines could be distinguished and isolated, one with the karyotype 3n,XXY, the other with 3n,XYY. In about 1%, diploid cells with two X or two Y chromosomes were found. Halooid, tetraploid, hexaploid and octoploid mitoses also occurred in a low percentage. The DNA replication pattern of triploid cells in the S period was studied by means of pulse labeling with 3H-thymidine and by measuring the relative DNA content. The G2 period of triploid cells was found to be about 1 hr longer than that of diploid cells, but about 15 min shorter than that of tetraploid cells. The role of multipolar mitoses in the formation of triploid cells and diploid cells with two X or two Y chromosomes is discussed.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-2013
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Human genetics 〈Berlin〉 30 (1975), S. 173-177 
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung Das Spätreplikationsmuster der kurzen Arme der X-Chromosomen von microtus agrestis wurde in weiblichen Zellen sowie in XX-Zellen männlicher Herkunft autoradiographisch mit 3H-Thymidin und mit Hilfe der BUdR-Giemsa-Technik untersucht. Die Lichtabsorption von mit BUdR einsträngig substituierten (markierten) Chromosomenabschnitten betrug nach Giemsafärbung 59,2% der Absorption von unmarkierten Chromosomen. In weiblichen Zellen wies die Asynchronie der DNS-Synthese auf das Vorhandensein von Euchromatin im X1 und von fakultativem heterochromatin im X2 hin. In männlichen Zellen wurde nur Euchromatin in den kurzen Armen sowohl von diploiden XX-und XO-Zellen als auch von triploiden XXY-, XX-und XO-Zellen gefunden. Diese Ergebnisse zeigen, daß in vitro in Zellen mit mehreren ursprünglich aktiven X-Chromosomen auch nach mehrjähriger Kulturzeit eine Inaktivierung eines X-Chromosoms nicht stattfindet.
    Notes: Summary The late replication pattern of the short arms of the X chromosomes of Microtus agrestis was studied in female cells and in cells with 2 X chromosomes of male origin by means of the BUdR-Giemsa technique and of 3H-thymidine labelling. The light absorption of Giemsa stained chromosome sections which were unifilarly substituted with BUdR (labelled), was found to be 59.2% of that of unlabelled chromosomes. In female cells, asynchrony of DNA replication of both X chromosomes indicated the presence of facultative heterochromatin in the X2 and euchromatin in the X1. In the male cells only euchromatic X chromosomes were observed in diploid XX and XO cells as well as in triploid XXY, XX and XO cells. The results show that inactivation of an X chromosome in vitro, in cells with more than one originally active X chromosome does not occur even after a culture duration of several years.
    Type of Medium: Electronic Resource
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