Search Results - (Author, Cooperation:F. Lara)

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  1. 1
    Staff View
    Publication Date:
    2012-02-10
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Alleles ; Animals ; Centromere/genetics ; Chromosomes, Insect/genetics ; Drosophila melanogaster/*genetics ; *Genome-Wide Association Study ; *Genomics ; Genotype ; Phenotype ; Polymorphism, Single Nucleotide/genetics ; Quantitative Trait Loci/*genetics ; Selection, Genetic/genetics ; Starvation/genetics ; Telomere/genetics ; X Chromosome/genetics
    Published by:
    http://www.nature.com/

    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Staff View
    Publication Date:
    2018-03-16
    Publisher:
    Wiley-Blackwell
    Print ISSN:
    0014-2980
    Electronic ISSN:
    1521-4141
    Topics:
    Medicine
    Published by:
    http://www.wiley.com/wiley-blackwell

    Latest Papers from Table of Contents or Articles in Press
  3. 3
    Jiménez-Domínguez, H. ; Figueroa-Lara, F. ; Galindo, S.

    [S.l.] : American Institute of Physics (AIP)
    Published 1986
    Staff View
    ISSN:
    1089-7623
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Electrical Engineering, Measurement and Control Technology
    Notes:
    It is suggested how an ordinary differential Bourdon gauge can easily be transformed into an absolute manometer.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.1138917

    Articles: DFG German National Licenses
  4. 4
    PAREDES-LOPEZ, O. ; SCHEVENIN, M. L. ; GUEVARA-LARA, F.

    Oxford, UK : Blackwell Publishing Ltd
    Published 1988
    Staff View
    ISSN:
    1750-3841
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Process Engineering, Biotechnology, Nutrition Technology
    Notes:
    The effect of centrifugation in the determination of hemagglutinin (lectin) activity was assessed. Seeds of two bean cultivars (Phaseolus vulgaris) were used for this study. The saline extracts of lectins from soaked and/or cooked samples showed significant decreases in hemagglutinin activity after centrifugation, whereas the activity of the same extracts from raw beans (control) did not change after this separation step. These results suggest that the use of centrifugation affects the hemagglutinin activity assessment.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1111/j.1365-2621.1988.tb13573.x

    Articles: DFG German National Licenses
  5. 5
    Staff View
    ISSN:
    0014-5793
    Keywords:
    Differential scanning colorimetry ; Domain folding ; Protein domain ; Protein stability ; Thermolysin
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Biology
    Chemistry and Pharmacology
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    http://linkinghub.elsevier.com/retrieve/pii/0014-5793(94)00358-0

    Articles: DFG German National Licenses
  6. 6
    Lara, F. ; Mateos, R.d.C. ; Vazquez, G. ; Sanchez, S.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0006-291X
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Biology
    Chemistry and Pharmacology
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1016/S0006-291X(82)80027-2

    Articles: DFG German National Licenses
  7. 7
    Lara, F. ; Mateos, R.d.C. ; Vazquez, G. ; Sanchez, S.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0006-291X
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Biology
    Chemistry and Pharmacology
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1016/S0006-291X(82)80027-2

    Articles: DFG German National Licenses
  8. 8
    Staff View
    ISSN:
    0009-2614
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Chemistry and Pharmacology
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    http://linkinghub.elsevier.com/retrieve/pii/0009-2614(93)89332-C

    Articles: DFG German National Licenses
  9. 9
    Shalashilin, D.V. ; Michtchenko, A.V. ; Lara, F.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0009-2614
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Chemistry and Pharmacology
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    http://linkinghub.elsevier.com/retrieve/pii/0009-2614(93)87022-U

    Articles: DFG German National Licenses
  10. 10
    Lazarev, G.G. ; Lara, F. ; Garcia, F. ; Rieker, A.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0009-2614
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Chemistry and Pharmacology
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    http://linkinghub.elsevier.com/retrieve/pii/0009-2614(92)80044-C

    Articles: DFG German National Licenses
  11. 11
    Staff View
    ISSN:
    0308-8146
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1016/0308-8146(89)90023-X

    Articles: DFG German National Licenses
  12. 12
    Staff View
    ISSN:
    0308-8146
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1016/0308-8146(90)90037-5

    Articles: DFG German National Licenses
  13. 13
    Staff View
    ISSN:
    0040-6031
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Chemistry and Pharmacology
    Type of Medium:
    Electronic Resource
    URL:
    http://linkinghub.elsevier.com/retrieve/pii/0040-6031(92)80258-X

    Articles: DFG German National Licenses
  14. 14
    Lara, F. M. ; Rossetto, C. J. ; Igue, T.
    Springer
    Published 1977
    Staff View
    ISSN:
    1570-7458
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Description / Table of Contents:
    Résumé La variété AF-28 et l'hybride R-1090 de Sorghum bicolor Pers. ont été comparés à différentes époques de l'année et en deux localités différentes de l'Etat de Sâo Paulo, Brésil. On n'a pas constaté d'interaction variété x époque ou variété x lieu. AF-28 a prouvé sa résistance à toutes les époques, aussi bien dans un lieu que dans l'autre; l'hybride par contre s'est montré grandement susceptible. Des moyennes de 252,2 et 136,7 mouches par panicule ont été observées pour l'hybride R-1090 à Campinas et à Jaboticabal contre 2,9 et 0,8 seulement par panicule de AF-28. Le préjudice a été estimé visuellement selon une échelle de 0 à 4. Des préjudices d'une valeur moyenne de 3,5 et 3,3 ont été attribués à l'hybride R-1090 à Campinas et à Jaboticabal respectivement, alors que simultanément la variété AF-28 ne subissait que des préjudices évalués à 0,5 et 0,3 respectivement. Quatre espèces de microhyménoptères parasites de Contarinia sorghicola ont été récoltées au cours de ce travail: Eupelmus popa et trois espèces différentes du genre Tetrastichus.
    Notes:
    Abstract The variety AF-28 of Sorghum bicolor Pers and the hybrid R-1090 were compared in relation to the sorghum midge, Contarinia sorghicola (Coquillet), (Diptera: Cecidomyidae) in two counties of the State of São Paulo. They were compared in seven successive monthly trials beginning in September 1972. Averages of 252 and 137 adult flies emerged per head of the hybrid R-1090 in Campinas and Jaboticabal respectively, while 2.9 and 0.8 emerged from AF-28. The damage was graded with a visual scale from 0 to 4. Average damage grades of 3.5 and 3.3 were attributed to the hybrid R-1090 in Campinas and Jaboticabal respectively, while the variety AF-28 had averages of 0.5 and 0.3, respectively.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00291785

    Articles: DFG German National Licenses
  15. 15
    Staff View
    ISSN:
    1420-9071
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Medicine
    Notes:
    Summary The distribution of fast, intermediate and slow renaturing fractions ofRhynchosciara americana DNA was examined in the polytene salivary gland chromosomes by in situ hybridization. Heterochromatic areas readily hybridized but hybrid formation in the euchromatin depended more on the repetitiveness of the RNA probe.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF01922714

    Articles: DFG German National Licenses
  16. 16
    Staff View
    ISSN:
    1432-0614
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Process Engineering, Biotechnology, Nutrition Technology
    Notes:
    Abstract Production of indole-3-acetic acid (IAA) by four strains of the maize pathogen Ustilago maydis was analyzed. The fungus induces gall formation on its host plant and IAA production by  U. maydis may be required as a pathogenicity or virulence factor. The study included the FB2 wild-type strain and the 103, 130FZ and 130FT mutants. Results show that treatment with clofibric acid, alone or in combination with UV light, can be used to obtain  U. maydis strains with defective IAA production in vitro, as quantified with the Salkowski reagent and by HPLC. The strain with the lowest production was 130FT, and its peak IAA level represented only 16% of the highest value obtained for the FB2 wild-type strain (124 μg/ml).
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/s002530051123

    Articles: DFG German National Licenses
  17. 17
    Staff View
    ISSN:
    1432-0886
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Medicine
    Notes:
    Abstract We have studied the distribution of DNA·RNA hybrids on polytene chromosomes with the aid of a goat antibody against DNA· RNA hybrids using the immunofluorescence technique. Fixed polytene chromosomes of the sciarid Trichosia pubescens (Diptera) show distinct, stage-specific labelling patterns throughout larval development. Controls for the staining procedure — including preincubation with hybrid-specific endoribonuclease H — prove that DNA·RNA hybrids are present on fixed chromosomes. They are revealed only under mild fixation conditions which do not efficiently immobilise all chromosomal proteins, indicating that some proteins have to be removed to make the antigens accessible to antibody. Certain fixation conditions may also cause local denaturation of chromosomal DNA, and some hybrids may possibly form during specimen preparation. After incorporation of radioactive uridine, a combination of phase contrast, fluorescent, and autoradiographic images of one and the same chromosomal preparation demonstrates that hybrid fluorescence is confined to transcriptionally active regions. Two puff classes can be distinguished. The first binds antibody and includes most RNA puffs and all DNA puffs so far studied; the second, comprising some RNA puffs, does not show bright fluorescence in spite of the fact that RNA synthesis is high as revealed by 3H-uridine incorporation. DNA·RNA hybrids are not found at DNA puff sites during the DNA amplification period; these sites contain detectable hybrids only when transcription is taking place. — Combination of the fluorescent technique with its excellent resolution and autoradiography should be helpful in studying detailed topological aspects of transcriptionally active chromosomal regions.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00327628

    Articles: DFG German National Licenses
  18. 18
    Staff View
    ISSN:
    1432-0886
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Medicine
    Notes:
    Abstract An analysis of the polypeptides synthesized in the salivary glands of late fourth instar R. americana larvae was accomplished by the use of electrophoresis followed by fluorography of in vitro labelled proteins. It was possible to detect five polypeptides which are synthesized only when the giant DNA puffs occur. One of these polypeptides was tentatively assigned to DNA puff B2 and another to the DNA puff C3. This assignment was based on correlations of polypeptide labelling, puffing patterns and RNA synthesizing capacity of the puffs in different sections of the gland during development. The possible meanings and implications of these DNA puffs are discussed.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00292804

    Articles: DFG German National Licenses
  19. 19
    Staff View
    ISSN:
    1432-0886
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Medicine
    Notes:
    Abstract Titers of ecdysone and 20-OH ecdysone were measured separately in both hemolymph and salivary glands of metamorphosing Rhynchosciara larvae. Gland titers were consistently higher than hemolymph titers. Although 20-OH ecdysone was the most prominent form of the hormone, measurable quantities of ecdysone were also observed throughout development in both tissues. Changes in salivary gland replication and puffing activity could be correlated with changes in gland 20-OH ecdysone titers. This was true for both developmentally changing RNA puffs and “DNA puffs,” which occur during the prepupal period. The DNA puffs are tied to the final DNA replication cycle, and both this cycle and the period of amplification can be correlated with increases in gland 20-OH ecdysone content. Various aspects and possible interpretations of the above correlations are discussed.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00352275

    Articles: DFG German National Licenses
  20. 20
    Berendes, H. D. ; Lara, F. J. S.
    Springer
    Published 1975
    Staff View
    ISSN:
    1432-0886
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Medicine
    Notes:
    Abstract Injection of β-ecdysone into mid fourth instar larvae of Rhynchosciara americana induced within 23–28 hours after injection a rise in the percentage of 3H-thymidine (3H-TdR) incorporating nuclei in salivary gland region S1 from about 10–20% in the controls to 80–90% in the injected larvae. The 3H-TdR incorporating nuclei displayed a weak continuous labeling pattern or a band-labeling pattern with grains over the vast majority of the bands. The majority of nuclei with a band labeling pattern displayed DNA amplification at the DNA-puff regions. — Injection of actinomycin D at different times after ecdysone injection abolished the higher incorporation rate at the amplifying regions within 15 hours after the injection. However, the percentage of nuclei incorporating 3H-TdR and the frequency of the two labeling patterns remained essentially the same when RNA synthesis was inhibited. Only the over-all rate of 3H-TdR incorporation seemed to be reduced. — These data suggest that in the DNA puff regions the rate of DNA chain elongation is higher when amplification occurs than during a normal replication cycle. It, further, seems that the higher rate during amplification is dependent upon de novo RNA synthesis.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00283470

    Articles: DFG German National Licenses