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  • Articles  (155)
  • 1975-1979  (113)
  • 1960-1964  (36)
  • 1955-1959  (6)
  • Biology  (155)
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  • Articles  (155)
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  • 1
    Electronic Resource
    Electronic Resource
    La Micología Médica En México Revisión De La Bibliografía Aparecida Durante El Período De 1946 A 1958 (1960)
    Springer
    Mycopathologia 13 (1960), S. 48-71 
    Details
    ISSN: 1573-0832
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Summary A general review is presented of some of the mexican literature dealing with medical mycology appeared during the 1946–1958 period. This paper is divided in several sections in accordance with the mycoses that have been observed in Mexico; brief comments are made of each reference. It can be observed that in addition to the dermatomycosis, the most frequent mycoses in Mexico are the actinomycotic mycetoma produced byNocardia brasiliensis, sporotrichosis, coccidioidomycosis, actinomycosis, chromomycosis and the acute pulmonar primoinfection of histoplasmosis. The other mycoses are not very common in Mexico and are only occasionally observed. A complete list of the reviewed papers is appended.
    Notes: Resumen Se presenta una revisión general de algunas de las publicaciones mexicanas sobre micología médica aparecidas durante los años de 1946 a 1958. Se divide el trabajo en secciones de acuerdo con las micosis que se han observado en México y se comentan los trabajos publicados correspondientes a cada tema. Se observa que las micosis más frecuentes en México, además de las dermatomicosis, son el micetoma actinomicósico producido porNocardia brasiliensis, la esporotricosis, la coccidioidomicosis, la actinomicosis, la cromomicosis y la infección primaria pulmonar epidémica porH. capsulatum. Las demás se presentan en forma escasa y sólo en ocasiones se encuentran comunicaciones en la literatura. Se proporciona la bibliografía de los trabajos comentados.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02107294
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  • 2
    Electronic Resource
    Electronic Resource
    Pyrenesulfonyl azide: a marker of acetylcholine receptor subunits in contact with membrane hydrophobic environment (1979)
    s.l. : American Chemical Society
    Biochemistry 18 (1979), S. 1200-1206 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00574a013
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  • 3
    Electronic Resource
    Electronic Resource
    Antigens of the Subcellular Fractions of Trypanosoma cruzi. II. Flagellar and Membrane Fraction (1977)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 24 (1977), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. A method for isolation of membrane and flagellar fractions from Trypanosoma cruzi epimastigotes, and descriptions of their ultrastructural characteristics and antigenic activity are presented. Electron-microscopic observations revealed that the membrane fraction resembled vesicles, as occurs frequently when the pressure-depressure method is used for cell disruption. The flagellar fraction revealed flagella and some membranes, both related and unrelated to the flagellar structure. Flagellar and membrane fractions had 5 and 3 precipitin lines respectively against anti-whole homogenate of T. cruzi. in double diffusion tests. One of the precipitin bands common to both fractions gave a reaction of identity with one precipitin line of the microsomal fractions, that was not present in the mitochondrial, nuclear and cell sap fractions. Data from tests of protective activity obtained during a period of 3 years with whole homogenate and F and M fractions are also presented. Protective activity against lethal challenge doses of trypomastigotes is strongly associated with the flagellar fraction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1977.tb01009.x
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  • 4
    Electronic Resource
    Electronic Resource
    Native Plasminogen* (1964)
    s.l. : American Chemical Society
    Biochemistry 3 (1964), S. 285-291 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00891a001
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  • 5
    Electronic Resource
    Electronic Resource
    The Biology and Ecology of Armored Scales (1975)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Entomology 20 (1975), S. 47-73 
    Details
    ISSN: 0066-4170
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.en.20.010175.000403
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  • 6
    Electronic Resource
    Electronic Resource
    Quaternary structure changes and kinetics of urease inactivation by L-usnic acid in relation to the regulation of nutrient transfer between lichen symbionts (1978)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 1 (1978), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract L-usnic acid inactivates urease by the formation of high molecular weight aggregates which can reach a maximum of 700,000 under experimentation conditions previously described. The substrate, urea, itself provokes temporary aggregation states which may be either active or inactive; the latter being reversible. However, these inactive aggregates, of 820,000 molecular weight, are irreversibly stabilized by L-usnic acid. The active aggregates with molecular weights oscillating from 605,000 to 650,000, depending on whether they are formed in the presence or absence of inactivator, may combine with the substrate to form an apparently normal ES complex.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.1978.tb00742.x
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  • 7
    Electronic Resource
    Electronic Resource
    Genetics of Entamoeba histolytica: Differences in Drug Sensitivity between Laredo and other Strains of Entamoeba histolytica (1962)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 9 (1962), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. The “Laredo strain” of Entamoeba histolytica has been reported to have different temperature requirements for growth than the usually known strains of the species, although morphological and antigenic tests have thus far indicated no significant recognizable differences. Further genetic studies show the Laredo strain to exhibit at least four characteristics different from the usual. Also, a freshly isolated strain (BA) was shown to have the same characteristics as those previously reported for some well-known strains.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1962.tb02655.x
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  • 8
    Electronic Resource
    Electronic Resource
    Critical thermal maxima of two species of estuarine fish (1977)
    Springer
    Marine biology 41 (1977), S. 141-145 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Critical thermal maxima (CTM) were determined for winter flounder (Pseudopleuronectes americanus, Walbaum) and scup (Stenotomus chrysops, L.), acclimated to ambient water temperature or constant increments above ambient. The acclimation regimes simulated a natural environment by tracking the temperature fluctuations in Point Judith Pond, a small Rhode Island estuary. An elevation in CTM from 30.2° to 35.6°C was observed for scup as the mean acclimation temperature increased from 14.8° to 22.2°C. CTM for flounder increased from 26.4° to 32.4°C over an acclimation range of 4.2° to 23.0°C. The use of CTM studies for predicting the effects of heated effluents is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00394021
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  • 9
    Electronic Resource
    Electronic Resource
    Responses of an estuarine population of the blue mussel Mytilus edulis to heated water from a steam generating plant (1976)
    Springer
    Marine biology 34 (1976), S. 177-189 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract An entire bed of the blue mussel Mytilus edulis, consisting of 5,000 individuals/m2, died during June, 1971 in the effluent canal of a steam generating plant when the temperature increased above 27°C. Similarly, the population in the intake canal disappeared when temperatures rose above 27°C in August. Laboratory studies showed that M. edulis could not tolerate continuous temperatures above 27°C, and feeding stopped shortly after the mussels were exposed to 25°C. Histopathological studies indicated that the cause of death of this bivalve was associated with degeneration of the frontal and laterofrontal cilia of the columnar epithelium of the gill filaments. In conjuction with this, there was necrosis and sloughing of the epithelium of the intestinal diverticula. Extensive amoebocytic infiltration was noted in the byssogenous cavity, gill filaments and stomach wall.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00390760
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  • 10
    Electronic Resource
    Electronic Resource
    Sulfatide content and (Na++K+)-ATPase activity of skin and gill during larval development of the chilean frog,Calyptocephalella caudiverbera (1979)
    Springer
    The journal of membrane biology 51 (1979), S. 347-359 
    Details
    ISSN: 1432-1424
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Summary The sulfatide content, phospholipid concentration, and (Na++K+)-ATPase activity from skin and gills of different stages of larval development ofCalyptocephalella caudiverbera (a Chilean frog) were analyzed. Additionally, the short-circuit current in skin was studied. When skin and gills, depending on the stage of larval development, present (Na++K+)-ATPase activity, they have a high ratio of sulfatide to amount of membrane and the phosphatidylserine concentration remains unchanged. Sulfatide content and (Na++K+)-ATPase activity in skin are in direct relationship with the level of sodium flux present during development. The specific enzymatic hydrolysis of sulfatide with partially purified arylsulfatase of pig kidney inhibits 100% of the ouabain-sensitive (Na++K+)-ATPase. The ouabain-insensitive ATPase remains virtually unchanged with the treatment, even with a high concentration of arylsulfatase or with ouabain present in the medium. These experiments strongly suggest a role of sulfatides in the (Na++K+)-ATPase activity and, as a consequence, in sodium ion transport.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01869091
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