ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

Your email was sent successfully. Check your inbox.

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

Proceed reservation?

Export
Filter
  • Articles  (21)
  • Articles: DFG German National Licenses  (21)
  • Latest Papers from Table of Contents or Articles in Press
  • Mouse  (11)
  • Fine structure  (10)
  • Springer  (21)
  • American Chemical Society (ACS)
  • Nature Publishing Group
  • 2020-2024
  • 2015-2019
  • 1985-1989
  • 1980-1984
  • 1970-1974  (21)
  • 1965-1969
  • 1935-1939
  • 2021
  • 1973  (21)
  • 1938
  • Medicine  (21)
  • Economics
  • Natural Sciences in General
Collection
  • Articles  (21)
Source
  • Articles: DFG German National Licenses  (21)
  • Latest Papers from Table of Contents or Articles in Press
Publisher
  • Springer  (21)
  • American Chemical Society (ACS)
  • Nature Publishing Group
Years
  • 2020-2024
  • 2015-2019
  • 1985-1989
  • 1980-1984
  • 1970-1974  (21)
  • +
Year
Topic
  • 1
    ISSN: 1432-0827
    Keywords: Osteopetrosis ; Diphosphonates ; Bone Resorption ; Mouse ; Calcium ; Tooth ; Bone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Description / Table of Contents: Résumé L'effet de doses quotidiennes, administrées depuis la naissance, de deux types de diphosphonates, à savoir l'éthane-1-hydroxyle-1,1-diphosphonate (EHDP) et le dichlorométhylène diphosphonate (Cl2MDP), sur la croissance et le squelette de souris a été étudié. Les diphosphonates freinent la croissance: les incisives ne font pas leur éruption ou elle est plus tardive. La calcémie est normale. L'administration de Cl2MDP à une dose quotidienne de 10 mg P/kg/jour provoque des modifications squelettiques identiques à celles des souris grises létales atteintes d'ostéopétrose et les animaux meurent après quatre semaines de traitement. Par rapport aux témoins, les souris traitées présentent des os plus étroits, plus denses et plus déformés: les cavités médullaires sont comblées avec de l'os calcifié et du cartilage. La quantité totale de calcium d'un animal n'est pas augmentée par traitement au diphosphonate, par rapport à un témoin de même âge. Chez les souris grises létales et celles traitées aux diphosphonates, la plupart des anomalies est secondaire à une résorption osseuse diminuée. Ces résultats sont commentés en fonction de l'emploi des diphosphonates au cours de remaniements osseux pathologiques augmentés et en fonction du rôle de la résorption osseuse dans le maintien de la calcémie.
    Abstract: Zusammenfassung Mäuse erhielten von der Geburt an tägliche Dosen folgender zwei Diphosphonate: entweder Äthan-1-Hydroxy-1,1-Diphosphonat (EHDP) oder Dichloromethylen-Diphosphonat (Cl2MDP). Es wurde deren Wirkung auf das Wachstum und das Skelet untersucht. Die Diphosphonate verlangsamten das Wachstum, die Schneidezähne brachen nicht oder erst später durch, aber die Höhe des Plasmacalciums blieb normal. Die Verabreichung von Cl2MDP in Dosen von 10 mg P/kg/Tag führt zu Skeletveränderungen, welche denjenigen der „grey-lethal” osteopetrotischen Mäuse gleichen. Die Tiere sterben nach einer Behandlungsdauer von etwa 4 Wochen. Verglichen mit normalen Mäusen von ungefähr gleichem Alter hatten die behandelten Mäuse kleinere, dichtere und mehr keulenförmige Knochen, und die Markhöhlen waren gefüllt mit verkalktem Knochen oder Knorpel. Die Gesamtcalciummenge im Skelet wurde durch die Diphosphonatbehandlung nicht erhöht; dies ergab sich aus einem Vergleich mit der bei normalen Mäusen desselben Alters gefundenen Menge. Es wird vorgeschlagen, daß bei den „grey-lethal” und bei den Diphosphonat-behandelten Mäusen viele der Abnormalitäten als Folge der herabgesetzten Knochenresorption angesehen werden müssen. Die Ergebnisse werden einerseits im Hinblick auf den Gebrauch der Diphosphonate bei pathologischen Bedingungen eines erhöhten Knochenumbaus diskutiert; andererseits werden sie im Zusammenhang mit der Rolle der Knochenresorption bei der Erhaltung des Plasmacalcium-Spiegels besprochen.
    Notes: Abstract The effect of daily doses from birth of two diphosphonates, namely either ethane-1-hydroxy-1,1-diphosphonate (EHDP) or dichloromethylene diphosphonate (Cl2MDP), on the growth and the skeleton of mice has been studied. Diphosphonates slowed growth, the incisors did not erupt or erupted later, but the level of plasma calcium remained normal. The administration of Cl2MDP at a dose rate of 10 mg P/kg/day leads to skeletal changes that are similar to those observed in grey-lethal osteopetrotic mice, and the animals die after about four weeks of treatment. As compared with normal mice of similar age, treated mice had bones that were smaller, denser and more clubshaped, and the marrow cavities were filled with calcified bone or cartilage. The total amount of calcium in the carcass was not increased by diphosphonate treatment, as compared with the amount in normal mice of the same age. It is suggested that both in the grey-lethal and diphosphonate-treated mice many of the abnormalities are secondary to decreased bone resorption. The results are discussed with respect to the use of diphosphonates in pathological conditions of increased bone turnover and with respect to the role of bone resorption in the maintenance of plasma calcium levels.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Calcified tissue international 12 (1973), S. 117-124 
    ISSN: 1432-0827
    Keywords: Mouse ; Calcification ; Metals ; Mast Cells
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Description / Table of Contents: Résumé Des souris, ayant reçu par voie intra-veineuse une solution d'acétate de plomb, sont injectés par voie sous-cutanée avec du sulfate de polymixine B. Au niveau de ce dernier point d'injection, on observe des calcifications. L'examen histologique montre une dégranulation des mastocytes, une vaso-dilatation locale ainsi qu'une diffusion d'ions à partir des vaisseaux. Après 24 heures, des ions calcium et phosphate sont présents. En outre. des groupes de souris, pré-injectées par voie intraveineuse avec de l'acétate de plomb, reçoivent des extraits de granules de mastocytes, comportant du phosphate d'histamine, du sulfate de créatinine sérotonine, de l'héparine, du sulfate de chondroitine ou de l'acide hyaluronique. Seules les injections de sérotonine et d'histamine, connues comme vaso-dilatateurs et augmentant probablement la perméabilité capillaire, provoquent des calcifications. Il semble que le rôle des mastocytes dans la calcification soit lié principalement à la production d'une vasodilatation locale, avec perméabilité capillaire augmentée, plutot qu'à une action de liaison initiale des ions métalliques.
    Abstract: Zusammenfassung Nachdem Mäusen Bleiacetatlösungen intravenös eingespritzt worden waren, erhielten die Tiere Polymixin-B-Sulfat subkutan. Dies führte zu Verkalkung an der zweiten Injektionsstelle. Die histologische Untersuchung zeigte eine deutliche degranulation der Mastzellen, eine lokale Vasodilatation und das Austreten von Bleiionen aus diesen Gefäßen 24 Std nach der Injektion konnte eine groß Menge von Calcium- und Phosphationen eindeutig nachgewiesen werden. Weiter wurden Gruppen von Mäusen, die vorher Bleiacetat intravenös erhalten hatten. Bestandteile von Mastzellen-Granula injiziert. Diese bestanden aus Histaminphosphat, Serotonin-Creatinin-Sulfat, Heparin, Chondroitin-Sulfat oder Hyaluronsäure. Unter diesen exogenen Bestandteilen bewirkten nur Serotonin und Histamin eine Verkalkung. Beide sind starke Vasodilatatoren und erhöhen vermutlich die kapillare Permeabilität. Es wird postuliert, daß die Rolle der Mastzelle in der “calcergy” viel eher auf einer lokalen Vasodilatation mit erhöhter kapillarer Permeabilität als auf einer primären Bindung der Metallionen beruht.
    Notes: Abstract Mice previously injected intravenously with lead acetate solution were injected subcutaneously with Polymixin B Sulphate. This resulted in calcification at the latter injection site. Histological evidence showed marked mast cell degranulation, local vasodilation and the efflux of lead ions from these vessels. At twenty four hours after injection abundant calcium and phosphate ions were readily demonstrated. In addition, groups of mice pre-injected intravenously with lead acetate, were injected with constituents of mast cell granules. These included histamine phosphate, serotonin creatinine sulphate, heparin, chondroitin sulphate or hyaluronic acid. Of these exogenous constituents used, calcification was found only after serotonin and histamine injections, both of which are potent vasodilators and presumbly increase capillary permeability. It is postulated that the role of the mast cell in calcergy may be mainly that of producing local vasodilation with increased capillary permeability rather than the initial binding of metallic ions.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 138 (1973), S. 299-314 
    ISSN: 1432-0878
    Keywords: Adenohypophysis ; Chicken ; Cytogenesis ; Fine structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In the chick embryo the first membrane-bound secretory granules occur in the cytoplasm of occasional cells in the cephalic lobe of pars distalis at the 7th day of incubation. On the 8th day most of the cells in both the cephalic and caudal lobes contain secretory granules that are variable in size, form and density. On the 9th day at least two types of glandular cells are distinguishable in the cephalic and in the caudal lobes; however, these cells are not comparable with those of the adult gland. Differentiation of acidophils and basophils occurs, apparently simultaneously, in 11-day embryos. The cells of the cephalic and caudal lobes are morphologically distinct from their first appearance. Thus it is concluded that these two lobes develop independently and differently from an early stage of ontogenesis. The secretory granules are formed in the Golgi area of the hypophysial cells after the 8th day of incubation. However, secretory material may be synthesized also by a process not involving the Golgi apparatus. Nerve fibers containing granules first appear in the superficial layer of the median eminence on the 8th embryonic day and by the 12th day three types of granules and two types of clear vesicles are identifiable.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 136 (1973), S. 191-205 
    ISSN: 1432-0878
    Keywords: Thymus ; Fine structure ; Avian ; Gallus domesticus ; Electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The ultrastructure of the normal thymus of the young chicken (Gallus domesticus) is described. Four main cell types, lymphoid cells, epithelial cells, macrophages and myoid cells, can be distinguished. The lymphocytes are more numerous in the cortex than in the medulla, and are quantitatively the most important component of the thymus. The epithelial cells vary greatly in morphology. Reticular epithelial cells, which have long cytoplasmic processes connected by desmosomes, and which appear to afford a supporting network for the free cells of the thymus, are present in the cortex and medulla. Undifferentiated epithelial cells are present in the medulla and cortico-medullary regions and have few intracytoplasmic fibrils or desmosomes. Cystic epithelial cells, showing intercellular and intracellular cyst formation are frequent in the medulla. Also present in the medulla are squamous epithelial cells which contain many intracytoplasmic fibrils and have numerous desmosomes, and which are involved in the formation of Hassall's corpuscles. Macrophages are present in moderate numbers in the cortex and medulla, and immature and fully developed myoid cells are common in the medulla. Other cell types present include granule-containing cells with desmosomes, large pale cells with few cytoplasmic organelles, mast cells, plasma cells, red blood corpuscles and cells of the granular leukocyte series.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 138 (1973), S. 155-169 
    ISSN: 1432-0878
    Keywords: Spermiogenesis ; Mouse ; Multinucleate spermatids ; Electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary This ultrastructural study confirms and extends the light microscope findings of Bryan (1971) concerning the presence and developmental fate of multinucleate spermatids. Four main classes of cells: uninucleate-individual, uninucleate-conjoined, multinucleate-conjoined, and multinucleate-individual, were identified along with a few instances of more complex syncytial organizations. When the respective nuclei in a given multinucleate are far enough apart, each develops autonomously but in synchrony with its neighbors. When nuclei are intimately associated, the “normal” pattern of spermiogenesis may be altered, giving rise to highly bizarre spermatozoa. Commonly, a single Golgi complex serves a pair of nuclei and gives rise to a “T-shaped” acrosome which binds the nuclei together. During the ensuing nuclear elongation phase, such units are invested by a single manchette. Pairs of axonemes within a common plasma membrane have also been encountered. These ultrastructural findings indicate that multinucleate spermatids are true components (not artifacts) of the seminiferous epithelium of normal animals. The presence of such cells and the unusual developmental consequences which can arise as a result of the multinucleate state must be taken into account when evaluating the course of spermatogenesis in cases of mutation- or chemically-induced infertility.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 136 (1973), S. 263-275 
    ISSN: 1432-0878
    Keywords: Vaginal epithelium ; Cell differentiation ; Mouse ; Estradiol sensitive antigen ; Immunocytology, Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The distribution of an antigenic material specific for the cervicovaginal epithelium (CVA) was studied in the vaginal epithelium of the adult mouse with immunofluorescence and immunoferritin techniques. The antigen localization has been correlated to the fine structure of the vaginal epithelium in various states of functional activity. The antigen distribution in adult ovariectomized mice and in ovariectomized mice treated with estradiol was compared with that in normal cycling mice. CVA was found to be associated with the exterior of the cell membrane of vaginal epithelium cells, being part of the glycocalyx. Two cell types, mucous or keratinized, are derived from the germinative cell layer of the vaginal epithelium, depending on the hormonal environment. Mucous cells with morphological features that characterize cells about to cornify have been demonstrated. Fluorescence as well as ferritin particles, indicating the presence of antigen-antibody complexes, were seen within the mucous droplets of the mucous cells. The CVA production is apparently connected with vaginal mucus formation. The CVA distribution in the adult vaginal epithelium is discussed in relation to the distribution demonstrated earlier in the cervicovaginal epithelium of neonatal mice.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 136 (1973), S. 277-289 
    ISSN: 1432-0878
    Keywords: Protonephridial system ; Turbanella cornuta Remane (Gastrotricha) ; Cyrtocytes ; Fine structure ; Electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung Die Protonephridien des marinen Gastrotrichs Turbanella cornuta Remane werden elektronenmikroskopisch untersucht. Die Terminalapparate der Macrodasyoidea sind Cyrtocyten. Ein Reusenröhrchen besteht aus acht Längsstäben mit netzartigen Zwischenwänden aus dünnen Fibrillen. Im Lumen des Röhrchens schwingt eine Geißel. Die Wand eines Terminalbechers bildet ein zusätzliches Reusensystem, das mit Poren und Schlitzen versehen ist. Die drei bis vier Cyrtocyten eines Protonephridiums münden in eine Sammelzelle ein. Von dieser geht ein Exkretionsröhrchen mit Treibwimperflamme aus, welches von einer Ausleitungszelle gebildet wird. Die Cyrtocyten der beiden Gastrotrichenordnungen (Chaetonotoidea u. Macrodasyoidea) grenzen sich strukturell gegenüber bisher bekannten Formen dieses Zelltyps ab.
    Notes: Summary The protonephridial system of the marine gastrotrich Turbanella cornuta Remane was studied with the electron microscope. The terminal cells of the Macrodasyoidea are Cyrtocytes. Each tube for filtration consists of eight longitudinal rods with a net of fine fibrils between them; it contains a single whip. The wall of a terminal cup with its pores and slits is an additional system for filtration. Three or four filtration tubes are ending in a collecting cell. From this cell an excretory channel with one whip formed by an outlet cell arises. The filtration tubes of Macrodasyoidea are similar to those of Chaetonotoidea and differ from other forms of this cell-type.
    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 138 (1973), S. 455-474 
    ISSN: 1432-0878
    Keywords: Adenohypophysis ; Bird ; Prolactin cell ; Reproduction ; Fine structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The anterior pituitaries from a series of female White-crowned Sparrows,Zonotrichia leucophrys pugetensis, in the periods of oviposition, incubation, and brooding under natural conditions, have been investigated by electron microscopy. The prolactin cells occur in cephalic lobe and are characterized by large (ca. 300–600 mμ), polymorphic electron-dense secretory granules and an extremely well developed, lamellated endoplasmic reticulum. During incubation and brooding it is only these prolactin cells that are in an activated secretory phase, as indicated by increase in number and size, extremely well developed endoplasmic reticulum, decrease in number of mature secretory granules, and by active formation of granules in the enlarged Golgi apparatus. In the late stages of brooding, and post-breeding, the prolactin cells regress with involution of the endoplasmic reticulum and Golgi apparatus, reaccumulation of granules, and the appearance of lysosomes. The gonadotropes of both the cephalic and caudal lobes undergo progressive morphologic changes through the course of the breeding period. They are numerous and active in the ovulating bird. They undergo gradual regression during the periods of incubation and brooding to become typical “broody” cells.
    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 146 (1973), S. 319-328 
    ISSN: 1432-0878
    Keywords: Hypothalamus ; Mouse ; Arcuate neurons ; Nucleolus-like bodies ; Electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The arcuate nucleus of untreated (control) and castrated adult mice was studied with the electron microscope. Nucleolus-like bodies (NLB) were found in the cytoplasm and occasionally in the dendrites of arcuate neurons. NLB were spherical or ovoid, 0.7–1.5µm in diameter; they were composed of granules 100–150 Å and 200 Å in diameter, and filaments ∼70 Å in diameter. NLB were frequently associated with free ribosomes and cisternae of the rough endoplasmic reticulum. Light microscopic studies with basic dyes and enzymatic digestions showed that these bodies contained some RNA. There was no significant change in the number of NLB in castrated animals.
    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 136 (1973), S. 579-590 
    ISSN: 1432-0878
    Keywords: Caddisfly larvae ; Abdominal chloride epithelia ; Fine structure ; Histochemical chloride localization ; Electrolyte transport ; Osmoregulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The larvae of the caddisfly Anabolia nervosa Curt. (Limnephilidae) possess 10 fields on the dorsal and ventral sides of the 3rd to 7th abdominal segments, which were formerly regarded as specialized sites of respiration. The epithelial fine structure and histochemical localization of chloride unequivocally show that the main function of these sites is the transport of electrolytes. They probably participate in osmoregulation by the absorption of salt. Therefore, these specialized areas of the hypodermis are termed chloride epithelia.
    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...