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  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 377 (1995), S. 391-391 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR - Genome size (nuclear DNA content) is both lower and more uniform in birds than in other tetrapods. The mean DNA content for 165 avian species was reported to be 2.82 ±0.33 pg per cell1, as opposed to a mean of about 8 pg per cell in mammals2'3. Because avian ...
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  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 129 (1932), S. 59-59 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] DR. M. KATALINIĆ has described a method of producing floating drops of clean water on a water surface by delivery from a suitably situated jet.1 Such drops must owe their existence to the stability of the film immediately beneath them, that is, the thickness-coefficient of the ...
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  • 3
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] FIG. 1 Sequence of NAR clone 3-4 and phylogenetic trees using NAR domains, a, Sequence of clone 3-4. The putative signal sequence is double-underlined, and the positions of the domains are demarcated above the sequence. Cysteines that would take part in intradomain ...
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 362 (1993), S. 595-595 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR — In the light of recent searches for words from languages in protein sequences transcribed by the single-letter amino acid code1, and in the spirit of Harvey's suggestion2, we report our findings from the circumsporozoite protein of the malaria parasite Plasmodium falciparum. This ...
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 363 (1993), S. 307-307 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR- Slack et al.1 propose a particular pattern of expression of the set of hom-ologous Hox genes as the defining character (synapomorphy) for the king-dom Animalia. The expression pattern of the Hox genes, which they name zoo-type, controls antero-posterior spatial re-lationships at a particular ...
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  • 6
    Publication Date: 2022-05-25
    Description: © The Author(s), 2018. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Scientific Reports 8 (2018): 4917, doi:10.1038/s41598-018-23167-y.
    Description: Intertidal inhabitants are exposed to the 24-hour solar day, and the 12.4 hour rising and falling of the tides. One or both of these cycles govern intertidal organisms’ behaviour and physiology, yet little is known about the molecular clockworks of tidal rhythmicity. Here, we show that the limpet Cellana rota exhibits robust tidally rhythmic behaviour and gene expression. We assembled a de-novo transcriptome, identifying novel tidal, along with known circadian clock genes. Surprisingly, most of the putative circadian clock genes, lack a typical rhythmicity. We identified numerous tidally rhythmic genes and pathways commonly associated with the circadian clock. We show that not only is the behaviour of an intertidal organism in tune with the tides, but so too are many of its genes and pathways. These findings highlight the plasticity of biological timekeeping in nature, strengthening the growing notion that the role of ‘canonical’ circadian clock genes may be more fluid than previously thought, as exhibited in an organism which has evolved in an environment where tidal oscillations are the dominant driving force.
    Repository Name: Woods Hole Open Access Server
    Type: Article
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    International journal of consumer studies 28 (2004), S. 0 
    ISSN: 1470-6431
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
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  • 8
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 32 (1985), S. 0 
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Trypanosoma brucei strain 366D trypomastigotes grown at 37°C in the presence of a human fibroblast cell line formed foci underneath the feeder cells whereas trypanosomes grown in the presence of a human epithelial cell line grew only in the culture supernatant. A culture system was developed to study the differentiation of bloodstream trypomastigotes grown in the epithelial cell system into procyclic trypomastigotes at 27°C. The morphological differentiation into the procyclic form was complete by 48 h. Cell division did not occur until 30–40 h after transfer to 27°C. Various characteristics of this system were examined, including the effect of the feeder layer, the type of medium, the presence of the metabolites cis-aconitate and citrate, the preadaptation period, and the trypanosome cell concentration. The respiration of the recently differentiated procyclic cells was less sensitive to inhibition by CN-than that of established procyclic forms, implying a delayed appearance of complete mitochondrial oxidative pathways. This trypanosome differentiation system has the advantage that the animal host is not needed and the entire process is carried out in in vitro culture.
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  • 9
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 40 (1993), S. 0 
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: . Mitosis and cytokinesis in Katablepharis ovalis, a colorless flagellate, was investigated. Two new flagella are produced prior to prophase, resulting in a motile quadriflagellate cell during mitosis. the inner array of microtubules of the feeding apparatus disappears before prophase begins. the nuclear envelope disperses during prophase, apparently being converted into rough endoplasmic reticulum. the chromatin condenses and the nucleolus disperses with spindle microtubules appearing oriented perpendicular to the longitudinal axis of the cell. At metaphase, the chromatin is condensed as a single disc-shaped mass and rough endoplasmic reticulum flanks the chromatin mass on each side. Groups of spindle microtubules pass through tunnels in the rough endoplasmic reticulum and through electron-translucent areas of the chromatin. the spindle microtubules end at a number of minipoles in the cytoplasm. Vesicles, ribosomes, mitochondria and endoplasmic reticulum migrate among the spindle microtubules. There is no polar body or any electrondense area associated with the spindle poles. the basal bodies of the flagella remain attached to the axonemes and do not participate in mitosis. In anaphase, the chromatin separates and migrates to the poles. During telophase, the nuclear envelope reforms from the rough endoplasmic reticulum and the nucleoli reappear. the spindle microtubules are persistent during telophase. Cytokinesis occurs by longitudinal fission, starting at the anterior end and progressing posteriorly. Cytokinesis may be driven by elongation of the spindle microtubules since there is no visible structure associated with the furrowing.
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  • 10
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 36 (1989), S. 0 
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
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