ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

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: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Development genes and evolution 164 (1969), S. 97-133 
    ISSN: 1432-041X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Vom 3.–6. Tage post coitum enthält dieTrockensubstanz von Uterusflüssigkeit rd. 60% Peptidketten, am 6. Tage 19 Std p.c. nur noch 35%. Der Rest besteht vor allem aus Kohlenhydraten (s.III.1). Mittels Disc-Elektrophorese, Dünnschichtchromatographie nach Hydrolyse und Molekularsiebchromatographie ließen sich 4uterusspezifische Proteine — 2 davon sind kohlenhydratreiche Glykoproteine — physikalisch und chemisch charakterisieren und ihre relativen Konzentrationen vom 0.–8. Tage p.c. bestimmen (s.III.2): Glykoprotein I ist schon während des Oestrus zu finden. Seine Konzentration steigt vom 3.–5. Tage p.c. wenig, bis zum 6. Tage 6 Std. p.c. stärker an und nimmt später wieder ab (s.III.2.b). Sein Molekulargewicht liegt bei 50 000 (s. III.4). Postalbumin läßt sich ebenso wie Uteroglobin schon kurz nach der Ovulation nachweisen. Seine Konzentration ist vom 3.–6. Tage p.c. annähernd konstant und sinkt im Verlaufe des 6. Tages p.c. ab (s.III.2.b). Es hat ein Molekulargewicht um 30 000, ähnlich wie Uteroglobin (s.III.4). Uteroglobin ist vermutlich kohlenhydratfrei. Seine Konzentration steigt von 16–40 Std p.c. stark, bis zum 5. Tage p.c. gering an und sinkt danach wieder ab (s.III.2.b). Am 6. Tage p.c. beträgt sie rd. 50% (s. III.2.g). Glykoprotein II wird erst am 6. Tage p.c. sezerniert. Es ist gekennzeichnet durch einen hohen Galaktosegehalt (s. III.3.d). Seine Konzentration steigt im Verlaufe des 6. Tages p.c. stark an (s.III.2.b). Sein Molekulargewicht liegt über 70000 (s. III.4). Diese Proteine und Glykoproteine wurden ebenfalls in derBlastozystenflüssigkeit vom 5. Tage p.c. an nachgewiesen (s. III.2.c). Nach hormoninduzierterSuperovulation und natürlichem Deckakt bildet sich das uterusspezifische Proteinmuster nicht voll aus (s. III.2.d). BeiPseudogravidität, induziert durch den Deckakt mit vasektomierten Männchen, sind im Uterus in der Zeit vom 6. Tage 6 Std — 6. Tage 19 Std p.c. die gleichen Proteine vorhanden wie bei normaler Gravidität. Finden Implantationen von Blastozysten nicht statt, so bleibt das Proteinmuster des 6. Tages 19 Std p.c. bis zum 9. Tage p.c. hin fast unverändert erhalten (s. III.2.e). Im Verlaufe derImplantation werden Uterus- und Blastozystenlumen von Serumproteinen überflutet, welche die Sekretproteine weitgehend überdecken (s. III.2.f). In der Uterusflüssigkeit wurden 9 Kohlenhydratbestandteile identifiziert. FreieMonohexosen, insbesondere freie Glukose, konnten nicht nachgewiesen werden. Dieoligomeren Kohlenhydrate sind frei oder an Peptide gebunden (s. III.3). Mit Sephadex G 150 und G 75 SP ließen sich Glykoprotein I, II, Albumin und Uteroglobin + Postalbumin voneinander trennen (s. III.4). 21freie Aminosäuren wurden mit der Dünnschichtchromatographie in Uterus- und Blastozystenflüssigkeit identifiziert und die der Uterusflüssigkeit im Vergleich zu Serum semiquantitativ bestimmt. Bezogen auf gleiche Mengen Trockensubstanz sind in der Uterusflüssigkeit vor allem höhere Anteile Glycin, Alanin, Glutaminsäure und Asparaginsäure als im Serum vorhanden (s. III.5). Die mögliche Bedeutung der Aminosäuren für dieErnährung der Blastozyste, wird diskutiert; ebenso der mögliche Einfluß der uterusspezifischen Proteine und Glykoproteine aufErnährung und Morphogenese des Kaninchenkeimes.
    Notes: Summary Between the 3rd and 6th day post coitum the dry substance of uterine fluid contains nearly 60% peptide chains, on the 6th day 19 h p.c. only 35%. The remaining 40 and 65% resp. consist mainly of carbohydrates (cf. III.1). By means of disc electrophoresis, thin layer chromatography following hydrolysis and molecular sieve chromatography, we were able to characterize 4 uterine specific proteins, 2 of which are carbohydrate rich glycoproteins. Their relative concentrations were determined between 0 and 8 day p.c. (of. III.2): Glycoprotein I can already be found during oestrus. Its concentration increases slightly from the 3rd to the 5th day p.c., more rapidly up to the 6th day 6 h p.c., and decreases later (of.III.2b). The molecular weight is estimated to be around 50,000 (cf.III.4). Postalbumin as well as Uteroglobin can be found shortly after ovulation. Its concentration stays nearly constant between 3rd and 6th day p.c., and decreases during the 6th day p.c. (of.III.2b). Its molecular weight is in the same range as that of Uteroglobin, nearly 30,000 (of.III.4. Uteroglobin is most probably free of carbohydrates. Its concentration increases rapidly between 16 and 40 h p.c., slightly until the 5th day p.c., and decreases later (cf.III.2b). At 6th day p.c. about 50% of the peptide chains of uterine fluid are Uteroglobin (cf.III.2.g). Glycoprotein II is not secreted before the 6th day p.c. It has a comparativly high content of galactose (cf.III.3.d). Its concentration increases rapidly during the 6th day p.c. (cf.III.2.b). The moleculare weight is higher than 70,000 (cf.III. 4). These proteins and glycoproteins have also been found inblastocoelic fluid after the 5th day p.c. (cf.III.2.c). Aftersuperovulation induced by hormones, and natural mating, the pregnancy specific protein pattern is not fully developed (cf.III.2.d). Inpseudopregnancy, triggered by mating with vasectomized males, the same proteins as in normal pregnancy were found from the 6th day 6 h to the 6th day 19 h p.c. If no blastocysts are implanted, the protein pattern of the 6th day 19 h p.c. persists nearly unchanged until the 9th day p.c. (cf.III.2.e). Duringimplantation uterus and blastocyst lumens are filled with serum proteins, which tend to cover up the secretion proteins (cf.III.2.f). 9 constituents of carbohydrates could be identified in uterine fluid. There was no evidence for freemonohexoses, particularly free glucose. Theoligomere carbohydrates were free or bound to proteins (cf.III.3.). We were able to separate Glycoprotein I, Glycoprotein II, Albumin + Uteroglobin with Sephadex G 150 and G 75 SF (cf.III.4). 21 freeamino acids were found in uterine and blastocoelic fluid by means of thin layer chromatography. The concentrations of amino acids in uterine fluid were comparable to those of serum. The dry substance of uterine fluid contains more glycine, alanine, glutamic acid and aspartic acid than that of serum (cf.III.5). The possible role of amino acids in thenutrition of the blastocyst and the possible influence of uterine specific proteins and glycoproteins onnutrition and morphogenesis of the rabbit embryo were discussed.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Development genes and evolution 174 (1974), S. 172-180 
    ISSN: 1432-041X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The effect of uterine environment on lysis of the blastocyst coverings in the rabbit was studied in vivo and in vitro. After transplantation of 4, 5, and 6 days post coitum old blastocysts in foster does, the stage of pregnancy of which differed ± 2 days from the corresponding age of the blastocysts and after in vitro culture of 4 day old blastocysts, we investigated histologically the protease activity and the structure of the blastocyst coverings. The experiments revealed that only an exact synchronous in vivo medium is capable of initiating lysis or of support started lysis, although growth of the blastocysts seemed to be normal in foster uteri as well as in culture dishes. A series of figures on structural changes of the blastocyst between the 4 and the 8 day post coitum is compiled.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Development genes and evolution 190 (1981), S. 127-131 
    ISSN: 1432-041X
    Keywords: Uteroglobin ; Radioimmunoassay ; Progesterone ; Osmotic minipumps ; Immunohistochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary This study was undertaken to determine whether the influx of progesterone into the uterine lumen of the rabbit, in the preimplantation period, is dependent onuteroglobin (UGL). Rabbits were ovariectomized and, three months later, treated with two defferent doses of progesterone. Purified UGL was injected into one uterine horn and, as a control,immunoglobulin G (IgG) was injected into the other. After four days, the animals were sacrificed their uteri flushed, and the progesterone content of the washes was determined by radioimmunoassay. Animals with the lower serum progesterone level (2.8 ng/ml) had a significantly different uterine horn progesterone content. The hormone accumulation in the horn containing UGL was 2.3 to 7.5 times higher than in the horn containing IgG. Animals with a higher serum progesterone level (7.2 ng/ml) showed no differences. The hormone content was equally high in both horns, presumably due to the synthesis of endogenous UGL being reactivated by the hormone treatment. The validity of these experiments as models for the events during early pregnancy and the physiological role of progesterone available inside the uterus are discussed.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    ISSN: 1432-041X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Die Ultrastruktur der Kaninchenblastozyste vor der Implantation wurde untersucht im Hinblick auf ihre Fähigkeit, Substanzen aus der uterinen Umgebung zu resorbieren bzw. sie in die Blastozystenhöhle zu transportieren. Der Aufbau der Keimhülle, die Zell-zu-Zell Kontakte im Trophoblast und Entoderm und die ungewöhnlichen Protuberanzvesikel des Trophoblasten werden unter dem Gesichtspunkt ihrer möglichen Funktion diskutiert.
    Notes: Summary Ultrastructure of the preimplantation rabbit blastocyst was studied in view of its ability to resorbe substances from the uterine environment resp. to transport them to the blastocoelic cave. The architecture of the blastocyst covering, the cell-to-cell contacts of the trophoblast and entoderm, and the unusual protuberance vesicles in the trophoblast are discussed concerning their possibly function.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    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: In this work we present a comprehensive comparison of ultra thin thermally nitrided(TN) to plasma nitrided (PN) gate dielectrics (GD). We will show that thermal nitridation is apromising technique to increase the nitrogen concentration up to 25%. Furthermore, we willdemonstrate that ultra thin thermally nitrided GD have the potential to be an alternative solutioncompared to plasma nitrided GD. This work includes the analysis of physical and electricalparameters as well as reliability results from reliability characterization. Additionally, weinvestigated the impact of Deuterium on electrical parameters and reliability behavior
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    ISSN: 1432-0878
    Keywords: Steroids ; Autoradiography ; Uterine proteins ; Endometrium ; Blastocyst ; Rabbit
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary [3H] progesterone was injected into the uterine lumen of rabbits toward the end of preimplantation period (162 h post coitum). Light-microscopic autoradiography showed accumulation of label in single cell groups of the uterine epithelium. Fluorographs of thin layer chromatograms of steroid extracts indicated the metabolization of progesterone in the uterine tissue. Incubation of uterine sections with fluorescein isothiocyanate-conjugated progesterone-rabbit serum albumin revealed binding sites for this reagent: 162 h post coitum, staining was also localized in single cell groups of the uterine epithelium. Pretreatment with a monospecific antiserum showed Uteroglobin to be the binding protein.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 170 (1976), S. 415-424 
    ISSN: 1432-0878
    Keywords: Uterine specific proteins ; Oviduct ; Uterus ; Blastocyst of the Rabbit ; Immunohistochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The localization and release of uteroglobin (UGL) were investigated immunohistologically in the oviducts and uteri of female rabbits from oestrus through the 7th day post coitum and the blastocyst on the 7th day post coitum. UGL was detected within Fallopian tube cells even during oestrus. Granules of UGL appeared toward the bases of these cells. Subsequently, the cells became almost entirely filled with UGL. Drop-like protrusions of the apical cytoplasm suggest a mechanism of apocrine extrusion. All stages of filling and extrusion were visible during the entire preimplantation period. During oestrus, synthesis of UGL within uterine cells becomes sufficiently advanced so that extrusion has either already begun or is about to begin. UGL positive material first appears in the supranuclear regions. Later the entire cytoplasm shows a positive reaction. An uneven distribution of UGL cells is observed in the endometrium. Since only the glands adjacent to the myometrium and cells of the cavum epithelium contain UGL, a striking mosaic of UGL positive and negative cells results. The present report is the first detecting UGL in single cells of the blastocyst. Both entodermal and ectodermal cells proved to be UGL positive. The synthesis and section of UGL in the oviduct and uterus and the possible origins of UGL in the blastocyst are discussed.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 170 (1976), S. 425-434 
    ISSN: 1432-0878
    Keywords: Uterine specific proteins ; Uterus of the rabbit ; Immunohistochemistry ; Oestrogen-Progesterone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Rabbit uterine uteroglobin (UGL) was studied by electrophoretic and immunological methods following normal copulation, after ovariectomy and progesterone treatment, 17β-oestradiol and combined progesterone treatment, 17β-oestradiol treatment alone and after HCG-induced pseudopregnancy. Electrophoretic studies show the amount of ULG in uterine secretions, the immunological investigations indicate the intracellular localization of ULG and the distribution of ULG-positive cells in the endometrium. No obvious differences were found between the uteri 7 days after injection with chorion-gonadotropin and those 7 days following normal copulation. No differences could be demonstrated between the uteri of animals 35 days following ovariectomy and subsequent progesterone treatment on Days 31–33 and those of normal 7 d. post coitum (p.c.) animals. Uteri from animals treated with progesterone on Days 2–5 p.c. contained more ULG-positive cells than controls. 17β-oestradiol treatment with and without subsequent progesterone treatment resulted, in both gravid and ovariectomized animals, in the formation of a tall columnar endometrial epithelium. Treatment with 17β-oestradiol on Days 1 and 2 p.c. led to a decrease in the number of UGL-positive cells at 7 days p.c. Even after ovariectomy with 17β-oestradiol substitution, UGL-positive cells were still present in the endometrium. However a secretion of any magnitude could not be detected. The importance of differentiation between synthesis and secretion (= release) as distinct phases of the glandular response is especially emphasised by the latter findings.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 190 (1978), S. 15-25 
    ISSN: 1432-0878
    Keywords: Rabbit lung ; Bronchial secretions ; Rabbit uteroglobin ; Immunohistology ; Disc electrophoresis ; Immunoelectrophoresis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The immunological identity of a uteroglobin-like protein, occurring in respiratory tract secretions and tissue, with uteroglobin from rabbit endometrial secretion is demonstrated. A uteroglobin-like antigen has been localized in bronchial epithelial cells and in bronchioles by immunofluorescence. This secretory protein is, in contrast to the authentic uteroglobin, hormone-independent, as far as estrogens and progesterone are concerned. The possible significance of comparative studies on uteroglobin and the uteroglobin-like antigen is discussed, taking into account cytological, endocrinological, and molecularbiological aspects.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...