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  • Articles  (12)
  • Nature Publishing Group  (9)
  • Wiley-Blackwell  (3)
  • 2000-2004  (1)
  • 1985-1989  (4)
  • 1980-1984  (7)
  • 1920-1924
  • Biology  (12)
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  • Articles  (12)
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  • 1
    Electronic Resource
    Electronic Resource
    Noise and recognizability of coarse quantized images (reply) (1984)
    [s.l.] : Nature Publishing Group
    Nature 308 (1984), S. 212-212 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] MORRONE ET AL. REPLY-For us the most intriguing aspect of Harmon and Julesz's1 ingenious demonstration is that blocking does not merely degrade the image, but renders recognition impossible. Normal masking (such as their Fig. 3a1 or indeed our Fig. 1d2) degrades the image but leaves it still ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/308212a0
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  • 2
    Electronic Resource
    Electronic Resource
    Motion smear (1980)
    [s.l.] : Nature Publishing Group
    Nature 284 (1980), S. 164-165 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In addition to the threshold measurements of temporal summation it is also well established that super-threshold stimulation leads to a sensation which persists in vision for some time after the termination of the stimulus4, again, for about 120 ms in daylight5,6. Perhaps the most direct ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/284164a0
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  • 3
    Electronic Resource
    Electronic Resource
    Biochemical basis for the continuous copulation of female Schistosoma mansoni (1980)
    [s.l.] : Nature Publishing Group
    Nature 283 (1980), S. 478-479 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] To detect which proteins were actually produced by the worms, S. mansoni of the NIH strain were perfused from C57BL/6B mice at 70 days post-infection, mechanically separated according to sex, and incubated for 24 h in medium HB597 (Connaught) with 10% fetal calf serum and 8 µCi ml-1 ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/283478a0
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  • 4
    Electronic Resource
    Electronic Resource
    Mach bands are phase dependent (1986)
    [s.l.] : Nature Publishing Group
    Nature 324 (1986), S. 250-253 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Mach originally7 used rotating discs and drums to study the bright and dark bands that appear where ramps of luminance meet plateaux as, for example, at the borders of the penumbra of a shadow. He later devised optical methods to cast shadows8. For the studies reported here we used gratings formed ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/324250a0
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  • 5
    Electronic Resource
    Electronic Resource
    Criminalization of drugs (1989)
    [s.l.] : Nature Publishing Group
    Nature 342 (1989), S. 12-12 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIRá€"Your leading article "Bush declares war on drugs" (Nature 341, 1; 1989) is right in noting that if drug-related crime is to be totally eliminated, all drugs would have to be decriminalized, but it must be hoped that neither the United States, nor any other country for that ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/342012a0
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  • 6
    Electronic Resource
    Electronic Resource
    Added noise restores recognizability of coarse quantized images (1983)
    [s.l.] : Nature Publishing Group
    Nature 305 (1983), S. 226-228 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A detail of Leonardo's 'Mona Lisa' was digitized into 256 x 256 pixels, using a flying spot scanning system made up of a Cromemco microcomputer, an oscilloscope (Hewlett Packard 1335A), a lens and a photometer (Spectra Pritchard 1980A). The digitized file was transferred to a larger computer ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/305226a0
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  • 7
    Electronic Resource
    Electronic Resource
    Light isomerizes the chromophore of bacteriorhodopsin (1980)
    [s.l.] : Nature Publishing Group
    Nature 287 (1980), S. 351-353 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The absorption of a photon by light-adapted bacteriorhodopsin (bRLA), the purple membrane protein of the Halo-bacterium halobium, initiates a series of transformations13, reminiscent of the bleaching sequence of rhodopsin. The primary photochemical product, K, is a bathochromically shifted species; ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/287351a0
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  • 8
    Electronic Resource
    Electronic Resource
    Injustice of draft law will speed Italy's brain drain (2004)
    [s.l.] : Nature Publishing Group
    Nature 428 (2004), S. 891-891 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Sir Your News story “Wave of protest strikes Europe's universities” (Nature 428, 108; 200410.1038/428108a) gave the impression that the problems in Italy with the draft “Moratti” law were the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/428891b
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  • 9
    Electronic Resource
    Electronic Resource
    Evidence for the existence and development of visual inhibition in humans (1986)
    [s.l.] : Nature Publishing Group
    Nature 321 (1986), S. 235-237 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1 Amplitude of the second harmonic of VHP modulation as a function of grating contrast. The test was a sinusoidal grating of 1 cycle deg"1 measured with no mask (O) and with masks of 0.8 cycles deg"1 orthogonal (A) or parallel (D) to the test grating. The temporal frequency of the test was ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/321235a0
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  • 10
    Electronic Resource
    Electronic Resource
    Hydrolysis of wheat straw hemicellulose with trifluoroacetic acid. Fermentation of xylose with Pachysolen tannophilus (1984)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 26 (1984), S. 1122-1125 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Treatment of wheat straw with 1N trifluoroacetic acid (TFA) for 7 h at reflux temperature yielded 23% xylose based upon initial straw weight. This corresponds to about an 80% xylose yield based on the xylan content of the hemicellulose. The cellulose component of wheat straw was largely unaffected, as evidenced by low glucose yields. Decomposition of xylose by prolonged refluxing (23 h) was minimal in 1N TFA compared to 1N HCl. Treatment of wheat straw with refluxing 1N TFA converts about 10% of the lignin initially present in straw into water-soluble lignin fragments. Fermentation of the xylose-rich wheat straw hydrolyzate to ethanol with Pachysolen tannophilus was comparable to the fermentation of reagent grade xylose, indicating that furfural and toxic lignin by-products were not produced by 1N TFA in sufficient amounts to impair cell growth and ethanol production. Cellulase treatment of the wheat straw residue after TFA hydrolysis resulted in a 70-75% conversion of the cellulose into glucose.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260260916
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