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: 1432-041X
    Keywords: Embryonic induction ; Vegetalising factor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Vegetalising factor was isolated from swimbladder of crusian carp (Carassius auratus) by solubilishing with 8 M urea the precipitate obtained after digesting the swimbladder with collagenase. The urea-soluble fraction vegetalised isolated presumptive ectoderm ofTriturus gastrula and produced both undifferentiated mesodermal and endodermal cells. Brief heating of the fraction changed its capacity to produce organised mesodermal tissues, such as notochord and somite, and the frequency of induction of undifferentiated cells was reduced. By inserting the urea-soluble fraction into the blastocoel of an early gastrula, embryos without epidermis were obtained. Some of the embryos consisted of undifferentiated mesodermal and endodermal cells, but in the remaining ones small fragments of notochord, small numbers of somites and pronephros developed, enclosed by endodermal cells.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 185 (1977), S. 331-337 
    ISSN: 1432-0878
    Keywords: Ultrastructure ; Hepatic melanin ; Sex ; Age ; Xenopus laevis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The livers of Xenopus laevis, grouped by chronological age (0.5,2 and 3 yrs), were studied electron microscopically. Ultrastructurally most of the melanin granules in the mature female liver showed an-internal structure similar to the melanin granules of the oocytes. The hepatic melanin granules of immature females and of all males were pleomorphic and failed to show the characteristic internal structure similar to those of the oocytes. The oocyte is the probable source of most of the hepatic melanin of the mature female.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Publication Date: 1979-08-17
    Description: Discharges of Purkinje cells were recorded from the vermis, lobules VI and VII, of a monkey trained to track a visual target. When the monkey tracked a sinusoidally oscillating target, cellular activity changes in phase with the velocity signal of the eye movement. When the monkey fixated a stationary point, almost identical modulation in activity occurred, reflecting the velocity signal of the motion of the retinal image of the target. The data suggest that the vermis participates in the control of smooth pursuit eye movements by providing the oculomotor system with the actual target velocity information which is the sum of eye velocity and retinal image velocity signals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kase, M -- Noda, H -- Suzuki, D A -- Miller, D C -- New York, N.Y. -- Science. 1979 Aug 17;205(4407):717-20.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/111350" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; *Eye Movements ; Haplorhini ; Motion Perception/physiology ; Proprioception ; Purkinje Cells/*physiology ; Visual Perception/*physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    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...