Search Results - (Author, Cooperation:R. Vazquez)

Showing 1 - 20 results of 31, query time: 0.30s Refine Results
  1. 1
    B. Sicardy ; J. L. Ortiz ; M. Assafin ; E. Jehin ; A. Maury ; E. Lellouch ; R. G. Hutton ; F. Braga-Ribas ; F. Colas ; D. Hestroffer ; J. Lecacheux ; F. Roques ; P. Santos-Sanz ; T. Widemann ; N. Morales ; R. Duffard ; A. Thirouin ; A. J. Castro-Tirado ; M. Jelinek ; P. Kubanek ; A. Sota ; R. Sanchez-Ramirez ; A. H. Andrei ; J. I. Camargo ; D. N. da Silva Neto ; A. R. Gomes, Jr. ; R. V. Martins ; M. Gillon ; J. Manfroid ; G. P. Tozzi ; C. Harlingten ; S. Saravia ; R. Behrend ; S. Mottola ; E. G. Melendo ; V. Peris ; J. Fabregat ; J. M. Madiedo ; L. Cuesta ; M. T. Eibe ; A. Ullan ; F. Organero ; S. Pastor ; J. A. de Los Reyes ; S. Pedraz ; A. Castro ; I. de la Cueva ; G. Muler ; I. A. Steele ; M. Cebrian ; P. Montanes-Rodriguez ; A. Oscoz ; D. Weaver ; C. Jacques ; W. J. Corradi ; F. P. Santos ; W. Reis ; A. Milone ; M. Emilio ; L. Gutierrez ; R. Vazquez ; H. Hernandez-Toledo
    Nature Publishing Group (NPG)
    Published 2011
    Staff View
    Publication Date:
    2011-10-28
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Published by:
    http://www.nature.com/

    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Staff View
    Publication Date:
    2013-04-12
    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:
    Antimalarials/economics/isolation & purification/metabolism/supply & distribution ; Artemisinins/chemistry/economics/isolation & purification/*metabolism/*supply & ; distribution ; *Biosynthetic Pathways ; Biotechnology ; Fermentation ; Genetic Engineering ; Malaria, Falciparum/drug therapy ; Molecular Sequence Data ; Saccharomyces cerevisiae/classification/genetics/growth & development/*metabolism ; Singlet Oxygen/metabolism
    Published by:
    http://www.nature.com/

    Latest Papers from Table of Contents or Articles in Press
  3. 3
    Andivia E, Natalini F, Fernández M, Alejano R, Vázquez-Piqué J
    Italian Society of Silviculture and Forest Ecology
    Published 2018
    Staff View
    Publication Date:
    2018-12-17
    Publisher:
    Italian Society of Silviculture and Forest Ecology
    Electronic ISSN:
    1971-7458
    Topics:
    Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by:
    http://sisef.org/

    Latest Papers from Table of Contents or Articles in Press
  4. 4
    Zabalgogeazcoa ; Aldana, B. R. Vázquez de ; Criado, B. García ; Ciudad, A. García

    Oxford UK : Blackwell Science Ltd
    Published 1999
    Staff View
    ISSN:
    1365-2494
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes:
    The purpose of this work was to determine the frequency of infection by fungal endophytes in Festuca rubra plants from Mediterranean permanent grasslands (dehesas). Plants infected with the fungal endophyte Epichloë festucae were detected in all twenty-seven populations studied in the province of Salamanca, Spain. Infection frequencies in six selected populations ranged from 44% to 92% (average, 70%) of the plants. Infected plants were almost always symptomless. These results suggest that the association between E. festucae and F. rubra is common and occurs at a high frequency in Mediterranean permanent grasslands.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1046/j.1365-2494.1999.00155.x

    Articles: DFG German National Licenses
  5. 5
    Zabalgogeazcoa, I. ; De Aldana, B. R. Vázquez ; Ciudad, A. García ; Criado, B. García

    Oxford, UK : Blackwell Science Ltd
    Published 2003
    Staff View
    ISSN:
    1365-2494
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes:
    Abstract A survey of grass species associated with Epichloë and Neotyphodium fungal endophytes was made in permanent semi-arid grasslands of western Spain. Endophytes were isolated from 11 of 49 grass species analysed. Infected plants of Festuca arundinacea, Festuca rubra, Dactylis glomerata and Lolium perenne were detected at most locations studied. The grasses, Agrostis castellana, Brachypodium phoenicoides and Festuca ampla, are previously unknown endophyte hosts. The results obtained show that endophyte–grass interactions are present in the grasslands where this study was conducted.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1046/j.1365-2494.2003.00352.x

    Articles: DFG German National Licenses
  6. 6
    Amezcua-Allieri, M.A. ; Lead, J.R. ; Rodríguez-Vázquez, R.

    Oxford, UK : Blackwell Publishing Ltd
    Published 2005
    Staff View
    ISSN:
    1475-2743
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Geosciences
    Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes:
    Abstract. Different types of contaminants such as polycyclic aromatic hydrocarbons (PAHs) and metals coexist in different chemical forms in soil. Although bioremediation of organics has been widely studied, little attention has been paid to changes in metal behaviour during the bioremediation process. In this study, the diffusion gradient in thin-film (DGT) technique was used to assess changes in potentially bioavailable Cd and Cr fluxes in soil during the bioremediation of phenanthrene. Fluxes of Cd were low (〈 0.2pgcm−2 s−1) and increased to 0.4–0.9 pg cm−2 s−1, while Cr(III) fluxes showed an approximately tenfold increase. Results showed that there was increased mobilization of metals associated with the fungal reduction of phenanthrene concentrations by Penicillium frequentans.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1111/j.1475-2743.2005.tb00407.x

    Articles: DFG German National Licenses
  7. 7
    Vazquez, R. ; Bermejo, F. ; Castro, A. Martin ; Barahona, M.

    Oxford, UK : Blackwell Publishing Ltd
    Published 1978
    Staff View
    ISSN:
    1439-0264
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Medicine
    Notes:
    The response of the adrenal cortex to low temperature in relation to the length of the exposures is studied. The morphological changes of the adrenal cells, mainly in the Zona fasciculata, are examined. Thirty white rats of both sexes, divided into six groups, were exposed during time intervals of different lengths to temperatures ranging between – 12° and – 15°C. The cellular modifications encountered by means of the electron microscope at the level of the mitochondria, the smooth endoplasmic reticulum and the liposomes are analyzed and compared with the functional situation of the gland in an effort to establish the existence of a correlation between the morphology and the function.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1111/j.1439-0264.1978.tb00668.x

    Articles: DFG German National Licenses
  8. 8
    Staff View
    ISSN:
    1600-0714
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Medicine
    Notes:
    Background:  Salivary gland disorders have been included among the extra-hepatic manifestations related to HCV infection.Methods:  The whole stimulated salivary flow rate (spitting technique) was studied in 74 HCV infected patients to evaluate salivary gland dysfunction.Results:  The salivary flow of the patients with chronic HCV infection was similar to that of the healthy controls. The association between subjective xerostomia salivary flow was seen to be very weak. No significant associations were found between salivary flow and age, sex, risk factor of acquired infection, ALT, AST, GGT, ALP values, time lapsed since the diagnosis or HCV-RNA detection in saliva.Conclusions:  Although the functional repercussion of hepatitis C related lymphocytic sialoadenitis remains unclear, we did not find a significant reduction in the whole stimulated salivary flow in HCV infected patients.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1046/j.0904-2512.2001.00185.x

    Articles: DFG German National Licenses
  9. 9
    Riesco, J. M. ; Juanes, J. A. ; Diaz-Gonzalez, M. P. ; Blanco, E. J. ; Riesco-Lopez, J. M. ; Vazquez, R.

    Oxford, UK : Blackwell Publishing Ltd
    Published 1999
    Staff View
    ISSN:
    1600-0714
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Medicine
    Notes:
    Riesco JM, Juanes JA, Díaz-González MP, Blanco EJ, Riesco-Löpez JM, Vázquez R: Crystalloid architecture of a sialolith in a minor salivary gland. J Oral Pathol Med 1999; 28: 451–5. © Munksgaard, 1999.A sialolith from a minor salivary gland of the mucosa of the upper lip was studied morphologically and analytically. Under stereoscopic microscopic visualisation, no core or any concentric laminar structure was found in the sialolith and it had a transparent glassy appearance. Scanning electron microscopy revealed differences between the internal structure of the sialolith and its external structure. No microbes were observed but some mineralized inclusion bodies were seen. X-ray diffraction indicated the absence of inorganic crystals in the sialolith, while energy dispersive x-ray microanalysis revealed a high content of S followed by Ca, Si and Na and little and scarce P on the fracture surface, with S, Na, Ca and P being distributed throughout the external coating of the sialolith. The results suggest that the sialolith was young and consisted of a crystalloid body with an incipient coating undergoing calcification.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1111/j.1600-0714.1999.tb02105.x

    Articles: DFG German National Licenses
  10. 10
    Marcos Bravo*, C ; Luna Ortiz, I ; Outón Soto, A ; González Vázquez, R

    Copenhagen : Munksgaard International Publishers
    Published 1999
    Staff View
    ISSN:
    1398-9995
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Medicine
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1034/j.1398-9995.1999.00057.x

    Articles: DFG German National Licenses
  11. 11
    Rodriguez-Vazquez, R. ; Diaz-Cervantes, D.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0960-8524
    Keywords:
    Sugarcane bagasse pith ; lignocellulose ; pretreatment ; single cell protein
    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/10.1016/0960-8524(94)90115-5

    Articles: DFG German National Licenses
  12. 12
    Vazquez, R. ; Gonzalez, S. ; Rodriguez, A. ; Mourente, G.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0044-8486
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1016/0044-8486(94)90182-1

    Articles: DFG German National Licenses
  13. 13
    Bravo, C. Marcos ; Ortiz, I. Luna ; Vázquez, R. González

    Oxford, UK : Blackwell Publishing Ltd
    Published 1995
    Staff View
    ISSN:
    1398-9995
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Medicine
    Notes:
    A 60-year-old man developed an anaphylactic reaction immediately after administration of intramuscular sodium cefuroxime. By means of oral controlled challenge, the reaction was reproduced with a smaller dose of cefuroxime axetil. Cross-reactivity with other betalactam antibiotics was ruled out by in vivo tests. This case supports once again the relevance of the side-chain in betalactam allergy.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1111/j.1398-9995.1995.tb01160.x

    Articles: DFG German National Licenses
  14. 14
    Moreno, J ; López, M J ; Vargas-García, C ; Vázquez, R
    Springer
    Published 1998
    Staff View
    ISSN:
    1476-5535
    Keywords:
    Keywords: xanthan; agricultural wastes; Xanthomonas campestris
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Process Engineering, Biotechnology, Nutrition Technology
    Notes:
    Four different acid-hydrolyzed wastes, from melon, watermelon, cucumber and tomato were compared for xanthan production. Growth of Xanthomonas campestris, xanthan biosynthesis, kinetics and chemical composition were investigated. Both growth and xanthan production were dependent on the acid hydrolysate concentrations and available nitrogen. Melon acid hydrolyzed waste was the best substrate for xanthan production. Exopolysaccharide obtained throughout this study was compared to commercial xanthan, showing a very similar chemical composition. Acid hydrolyzed wastes are proposed as a new carbon source for xanthan production.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1038/sj.jim.2900582

    Articles: DFG German National Licenses
  15. 15
    Ruiz-Vazquez, R. ; Pueyo, C. ; Cerda-Olmedo, E.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0165-1161
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Biology
    Medicine
    Type of Medium:
    Electronic Resource
    URL:
    http://linkinghub.elsevier.com/retrieve/pii/0165-1161(78)90032-8

    Articles: DFG German National Licenses
  16. 16
    Staff View
    ISSN:
    1432-0568
    Keywords:
    Key words Bromodeoxyuridine ; Goitrogen ; PCNA ; Programmed cell death ; Thyrocytes
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Abstract  To assess the involvement of cellular inhibition and the appearance of apoptosis in regression of the hyperplastic thyroid gland towards normality, an experimental design was used to elicit non-toxic goiter by inducing hyperplastic goiter in rats by treatment with methimazole. We performed a morphological and PCNA immunocytochemical study together with in situ end labelling with bromodeoxyuridine in thyroid glands of rats receiving methimazole in their drinking water over 21 days after which they were allowed a recovery period of 0, 12, 24, 36, 48 and 72 h and 7, 14, 21 and 44 days. Serum T3 and T4 levels were found to be very low in the methimazole-treated animals although they increased after the goitrogenic compound had been withdrawn. Inhibition of cell proliferation and the burst of apoptosis play important roles in the regression of hyperplastic goiter in rats. Cell proliferation, which was strongly stimulated during goiter, fell significantly at 24 h, thereafter decreasing gradually as the recovery period progressed. Isolated cases of thyrocyte necrosis were observed ultrastructurally. Light and transmission electron microscopy revealed the existence of thyroid apoptosis with respect to the development of the study over time. Most apoptotic thyrocytes became detached from the follicular epithelium and later underwent cellular degeneration in the follicular lumen. The remaining apoptotic cells retracted their cytoplasm, lost contact with the follicular lumen and became located at the base of the follicles. The percentage of apoptosis showed that during the first week of thyroid involution apoptosis was already present but with low percentages while maximum values were attained at 21 days of survival. Our results suggest that, in the rat, during the return of thyroid follicular cells to normality after methimazole-induced hyperplastic goiter a balance arises between proliferation and cell death and that this balance is due to the inhibition of cellular proliferation and, secondarily, to the appearance of apoptosis, which becomes particularly evident towards the end of the first week after withdrawing the goitrogenic agent.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/s004290050195

    Articles: DFG German National Licenses
  17. 17
    Staff View
    ISSN:
    1432-0568
    Keywords:
    Prolactin ; Met-enkephalin ; Estradiol ; Immunocytochemistry ; Morphometry
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Summary In order to elucidate the possible role of estrogens in the sex-dependent modulation of met-enkephalin-induced prolactin secretion, and the cellular response at adenohypophyseal level, analyses of serum prolactin levels together with a morphometric study of prolactin-immunoreactive cells were carried out following intraventricular administration of the opioid to estrogenprimed male rats. Administration of the opioid led to an increase in the serum levels of the hormone and, morphometrically, a significant increase in the cellular, cytoplasmic and nuclear areas was observed. When naloxone was administered previously, the above, mentioned changes did not appear, and the values found were similar to those observed in the animals treated only with estrogens. The results suggest that the met-enkephalin-induced prolactin secretion is modulated by the gonadal steroid environment.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00186434

    Articles: DFG German National Licenses
  18. 18
    Staff View
    ISSN:
    1432-0568
    Keywords:
    Hypophysis ; Mammotropic cell ; Met-enkephalin ; Morphometry
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Summary An ultrastructural and morphometric study was carried out on the adenohypophyseal mammotropic cells of rats treated intraventricularly with an acute dose (150 μg) of Met-enkephalin. In the female rats, clear features of cellular hyperactivity appeared after opioid administration. The changes affected the Golgi complex, the rough endoplasmic reticulum, the mature and immature secretory granules and the images of exocytosis. Such changes did not appear when naloxone was administered before the opioid, and naloxone induced an increase in the numerical density of lysosomal dense bodies with lipoid inclusions. In the male animals, administration of an identical dose of Metenkephalin caused only a few significant changes, similar to those observed in the controls. It is concluded that Metenkephalin administered intraventricularly causes evident modifications in the mammotropic cells of female rats whereas such changes in the male animals are not significant.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00326589

    Articles: DFG German National Licenses
  19. 19
    Staff View
    ISSN:
    1432-0568
    Keywords:
    Prolactin cell ; Met-enkephalin ; Immunocytochemistry ; Ultrastructure ; Morphometr ; Rat(Sprague-Dawley)
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Summary A stimulatory effect on prolactin secretion had been describe after acute and systemic administration of met-enkephalin, but the effects of this opioid after chronic administration has not been reported, and the response of mammotroph cells is not clear. As a complement to previous studies, a morphometric analysis (light and electron microscopy) was carried out on prolactin cells from female rats treated chronically with met-enkephalin. Clear features of cellular hyperactivity appeared after chronic and systemic administration of the opioid, and these persisted for two weeks. The changes consisted in increases of cellular, cytoplasmic and nuclear areas, volume and surface densities of the Golgi complex and rough endoplasmic reticulum, as well as the numbers of exocytotic figures. These morphological alterations were paralleled by an increase in serum prolactin levels as detected by RIA. It is concluded that the increase in the synthesis and secretory activity of prolactin cells following chronic and systemic administration of met-enkephalin is very similar to those observed after acute and intraventricular administration.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00710406

    Articles: DFG German National Licenses
  20. 20
    Staff View
    ISSN:
    1432-0614
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Process Engineering, Biotechnology, Nutrition Technology
    Notes:
    Abstract This work focused on determining the effects of ammonia-nitrogen supplementation on the mesophilic solid-substrate anaerobic digestion of municipal wastes and waste activated sludge (biosolids). Bench-scale, semi-continuous, mesophilic reactors were operated with a 21-day mass-retention time and dosed with NH4Cl, such that the corresponding chemical O2 demand (COD)/N ratios in their feeds were 90, 80, 65 and 50 (reactors R1 or control, R2, R3 and R4 respectively). Reactor performance was evaluated in terms of the efficiency of volatile solid removal (efficiency for short), biogas productivity, methane content in the biogas, pH and volatile organic acid contents, among other monitoring and analytical parameters. The feedstock was a mixture of urban wastes with biosolids. It was found that the process performance deteriorated at increasing dosages of ammonia N, the process practically ceasing at COD/N = 50 (R4). Inhibition was characterized by efficiency and biogas productivity decreases and a more sudden drop of methane content in biogas and pH. A significant rise of propionic, butyric and valeric acid was found in reactors receiving the highest doses of ammonia N (R3 and R4). This suggested that inhibition of the syntrophic bacteria present in the anaerobic consortia also occurred. Luong and Pearson inhibition models were fitted to the data. Both models represented very well the acute effects of N supplementation on solid-substrate anaerobic digestion. However, the Luong model could also represent the process ceasing at a critical ammonia N concentration of 2800 mg/kg mixed solids.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/s002530050928

    Articles: DFG German National Licenses