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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Grass and forage science 26 (1971), S. 0 
    ISSN: 1365-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Sequential harvests of two tetraploid ryegrasses have shown that the commercially critical level of 90% germination was attained early in the ripening process. For the greater part of the maturation period the moisture level was maintained at 60% as in diploid grasses, but the rate of moisture loss during the latter part of ripening proved to be slower than in diploids. The large seeds are more susceptible to mecbanical damage at harvest and therefore require lower drum speed.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Grass and forage science 28 (1973), S. 0 
    ISSN: 1365-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Seed crops of perennial ryegrass S321 and tetraploid hybrid ryegrass Sabrina were sprayed with 3 pt diquat in 30 gal. water/ac (4.21 diquat in 337 1 water/ha) a few days before the normal date for harvest. Very low germination values were obtained wben the harvested seed was later tested and the production of abnormal seedlings from the treated crops was attributed to the presence of diquat in the seed. On the basis of these results the use of diquat is not recommended as a pre-harvest desiccant for ryegrass seed crops.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Weed research 10 (1970), S. 0 
    ISSN: 1365-3180
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Weed research 13 (1973), S. 0 
    ISSN: 1365-3180
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Techniques for estimating populations of viable weed seeds in soil can be grouped into those which involve sieving, flotation and subsequent viability determination, and those which rely on direct assessment of the seedlings arising from the soil samples (Kropáč, 1966). This germination technique, although undoubtedly useful, may be less efficient than extraction methods (Jensen, 1969) and has the disadvantage that the samples must be kept for a long period to ensure that germination of a high proportion of the seeds takes place. Experiments were made to examine some of the factors which might affect seed germination in soil samples placed in shallow dishes, and the results are summarized in this note.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Weed research 12 (1972), S. 0 
    ISSN: 1365-3180
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary. Freshly-collected seeds of twenty species of annual weeds were uniformly mixed with 2.5, 7.5 or 15 cm of soil confined in cylinders sunk in the ground outdoors. The soil was either cultivated four times a year or left undisturbed, seedling emergence was recorded, and after 5 years the numbers of viable seeds remaining were determined.Total seedling emergence from seeds incorporated to 2·5, 7·5 and 15 cm amounted to 75, 65 and 54% respectively of those added when the soil was cultivated, and 58, 36 and 21% where it was left undisturbed. The corresponding numbers of viable seeds remaining after 5 years were 2·3, 4·0 and 7·7% respectively for cultivated soil, and 6·8, 16·5 and 31·6% of the seeds initially added and then not disturbed. Individual species varied in their responses to increasing depth of incorporation and to cultivation; these differences are discussed in relation to the dormancy characteritics of the seeds.Devenir des semences de quelques mauvaises herbes annuelles à différentes profondeur dans un sol cultivé et non cultivé
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Weed research 13 (1973), S. 0 
    ISSN: 1365-3180
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary. In a 4-year experiment with a naturally-occurring population of viable weed seeds, the numbers in the top 23 cm of soil decreased exponentially in the absence of further seeding. The rates of loss were very similar on undisturbed plots which were left bare (34% per year), mulched with farmyard manure (31%) or grassed down (32%). On plots dug twice a year in March and September, the loss was 42% per year, and with frequent cultivation (dug seven times a year) it was 56% per year. The numbers of seedlings in any one year on plots dug twice a year represented approximately 6% of the viable seeds present at the start of the year.Variations du nombre de semences viables de mauvaises herbes dans le sol selon différents régimes
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Cambridge : Cambridge University Press
    Philosophy 46 (1971), S. 352-353 
    ISSN: 0031-8191
    Source: Cambridge Journals Digital Archives
    Topics: Philosophy
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical chemistry accounts 22 (1971), S. 105-108 
    ISSN: 1432-2234
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The calculation of the ring-current contribution to the proton chemical shifts in conjugated systems using uncoupled Hartree-Fock perturbation theory is improved by the inclusion of origin variation in the expression for the vector potential.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-5233
    Keywords: Betamethasone ; Diagnosis ; Early chemical diabetes ; Glucose test ; Glucose tolerance ; Serum cholesterol ; Uric acid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé L'action glycocorticoïde intense, prolongée et prévisible du phosphate disodique de bétamethasone (BPS) administré par voie i.v. a été utilisée comme une méthode efficace pour stimuler la réserve insulinopoïétique avant l'épreuve d'hyperglycémie provoquée (GTT). Les 13 patients sélectionnés pour cette recherche on reçu 4,5 mg de BPS, 16–18 hrs avant l'injection de 100 g de glucose. Chez 8 de ces patients on supçonnait l'existence d'un «diabète chimique initial», sur la base des éléments suivants: 1) caractéristiques cliniques telles que hypercholestérolémie, glycosurie transitoire, neuropathies simil-diabétiques, goutte et enfants macrosomiques; 2) histoire familiale de diabète, surtout si présente dans les deux branches ascendantes; 3) réponses nondiabétiques ou douteusessoit dans l'épreuve d'hyperglycémie provoquée conventionnelle effectuée le matin (MGTT),soit dans celle pratiquée l'après-midi (AGTT). Après pré-traitement avec BPS,tous les patients ont présentée une réponse sans aucun doute de type diabétique. On a étudié également 5 sujets qui avaient présentée une tolérance au glucose réduite avec l'AGTT, mais non avec le MGTT. Leur diathèse a été facilement confirmée même après que l'AGTT, répété à la suite d'un traitement diététique et avec hypoglycémiants oraux, avait mis en évidence l'amélioration de la tolérance au glucose. L'utilité diagnostique et pronostique du GTT sensibilisé par les corticostéroïdes reste limitée, puisqu'il provoque un stresspharmacologique en ce qui concerne la réserve insulinopoïétique; au contraire, l'AGTT représente une méthodephysiologique. Avec ce dernier test, une réduction de la tolérance au glucose a pu être mise en évidence dans la plupart des diabétiques suspects avec réponses au MGTT non-diabétiques ou douteuses. Du point de vue pronostique, la déplétion de la réserve insulinopoïétique est probablement plus grave chez les patients avec «diabète chimique initial» — où une hyperglycémie ayant une valeur diagnostique peut être mise en évidence grâce à l'AGTT — que dans les cas où une telle hyperglycémie peut être évoquée seulement après une préparation avec glycocorticoïdes. Chez certains patients on a démontré, au cours de l'AGTT et du BPS-GTT, une augmentation paradoxale de l'uricémie et/ou de la cholestérolemie. Le rôle de ces phénomènes en ce qui concerne la pathogénie et le traitement de la goutte, de l'hypercholestérolemie et de l'«insuffisance secondaire des sulfamides hypoglycémiants» est discuté.
    Abstract: Resumen La acción glicocorticoide intensa, dilacionada y previsible, del betametasón bisódico fosfato (BFS) e.v., ha sido utilizada como método eficaz para estimular la reserva insulinopoyética antes del test de tolerancia a la glucosa (GTT). Los 13 pacientes seleccionados para llevar a cabo la investigación, han recibido 4,5 mg de BFS 16–18 hrs antes de la ingestión de la carga de glucosa (100 g). Se ha podido observar una «diabetes química inicial» en 8 pacientes, basándose en los siguientes elementos: 1) características clínicas tales como hipercolesterolemia, glicosuria transitoria, neuropatias periféricas simildiabéticas, gota e hijos macrosómicos; 2) familiaridad diabética, sobre todo cuando se presentaba en los dos ramos ascendentes; 3) reacciones no diabéticas o dudosastanto con el test convencional matutino de tolerancia a la glucosa (MGTT)como con el pomeridiano (AGTT). Tras previo tratamiento con BFS,todos los pacientes presentan una reacción segura de tipo diabético. Se han estudiado también 5 pacientes que habían manifestado una tolerancia a la glucosa disminuida con el AGTT, pero no con el MGTT. Su diatesis diabética fue facilmente confirmada por el BFS-GTT, incluso después de que se había evidenciado una mejor tolerancia a la glucosa con el AGTT, repetido después de tratamiento dietético y con hipoglicémicos orales. La utilidad bajo el aspecto diagnóstico y pronóstico del GTT sensibilizado con corticoesteroides sigue limitada, puesto que crea un stressfarmacológico a cargo de la reserva insulinopoyética. Eso está en contraste el métodofisiológico del AGTT, que ha puesto en evidencia una tolerancia reducida en la mayor parte de los pacientes en que se sospechaba la diabetes con reacciones al MGTT no diabéticas o dudosas. Desde el punto de vista pronóstico la depleción de la reserva insulinopoyética es probablemente más grave en los individuos con «diabetes química inicial», en los que se puede demostrar una hiperglicemia de significado diagnóstico por medio del AGTT, que en los casos en que la hiperglicemia se puede evocar sólo después de preparación con glicocorticoides. En ciertos pacientes durante el AGTT y el BFS-GTT, se ha demostrado un aumento con la uricemia y/o de la colesterolemia. Se discute, el papel de esos fenómenos, en relación con la patogénesis y el tratamiento de la gota, de la hipercolesterolemia y del «fracaso secundario de las sulfanilureas».
    Notes: Riassunto L'azione glicocorticoide intensa, protratta e prevedibile del betametasone fosfato bisodico (BFS) somministrato i.v. è stata utilizzata quale efficace metodo per stimolare la riserva insulinopoietica prima del test di tolleranza al glucosio (GTT). I 13 pazienti selezionati in questa ricerca ricevevano 4,5 mg di BFS 16–18 h prima dell'ingestione del carico di glucosio (100 g). In 8 pazienti esisteva il sospetto di un «diabete chimico iniziale», e ciò sulla base dei seguenti elementi: 1) caratteristiche cliniche quali ipercolesterolemia, glicosuria transitoria, neuropatie periferiche simil-diabetiche, gotta e figli macrosomici; 2) familiarità diabetica, soprattutto quando presente nei due rami ascendenti; 3) risposte non diabetiche o dubbiesia con il convenzionale test di tolleranza al glucosio mattutino (MGTT)che con quello pomeridiano (AGTT). Dopo il pretrattamento con BFS,tutti i pazienti presentavano una risposta indubbia di tipo diabetico. Sono stati studiati anche 5 soggetti che avevano manifestato una diminuita tolleranza al glucosio con l'AGTT, ma non con il MGTT. La loro diatesi diabetica venne facilmente confermata dal BFS-GTT, anche dopo che un miglioramento della tolleranza al glucosio era stato evidenziato con l'AGTT, ripetuto dopo trattamento dietetico e con ipoglicemizzanti orali. L'utilità diagnostica e prognostica del GTT sensibilizzato con corticosteroidi rimane limitata, in quanto esso crea uno stressfarmacologico a carico della riserva insulinopoietica. Ciò contrasta con il metodofisiologico dell'AGTT, che ha messo in evidenza una ridotta tolleranza nella maggior parte dei sospetti diabetici con risposte al MGTT non diabetiche o dubbie. Dal punto di vista prognostico, la deplezione della riserva insulinopoietica è probabilmente più grave nei pazienti con «diabete chimico iniziale», in cui una iperglicemia di significato diagnostico è dimostrabile con l'AGTT, che non nei casi in cui questa può essere evocata soltanto dopo preparazione con glicocorticoidi. In certi pazienti è stato dimostrato, durante l'AGTT ed il BFS-GTT, un aumento paradosso dell'uricemia e/o della colesterolemia. Viene discusso il ruolo di questi fenomeni, per quanto riguarda la patogenesi ed il trattamento della gotta, dell'ipercolesterolemia e del «fallimento secondario delle sulfaniluree».
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical chemistry accounts 17 (1970), S. 151-154 
    ISSN: 1432-2234
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract It is shown that uncoupled Hartree-Fock perturbation theory may be successfully applied to the determination of the ring current properties of heterocyclics.
    Type of Medium: Electronic Resource
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