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291.
A M Pasquino S Bernardini S Cianfarani G Mancuso S A Marchione F Passèri I Pucarelli G L Spadoni 《Hormone research》1992,38(3-4):120-124
Fifteen girls with Turner syndrome (TS) were submitted to GH secretion assessment before undergoing hGH therapy. In the first 9 months, hGH was given at a dose of 0.5 IU/kg/week s.c. daily; afterward, the dose was increased to 1 IU/kg/week s.c. daily. The girls were prepubertal, with a mean (SD) chronological age (CA) of 12.5 (2.6) years, and a mean (SD) bone age of 10.5 (1.8) years. A clonidine stimulation test, 1-29 GHRH test and GH spontaneous nocturnal secretion assessment were performed in all patients. Results showed a variable pattern of GH secretion in 10 patients, in only 2 did we find all values definitely normal, and in 3 we found a total GH deficiency. Height velocity, expressed as standard deviation scores (SDS) for CA according to Turner references, during the first year of treatment increased significantly: 0.36 (1.15) -3.30 (2.87) (p < 0.001), and the increment remained quite unchanged during both the second and third years: 3.16 (2.96) and 2.55 (3.87), respectively (n.s.). Height, expressed in SDS for CA for Turner references, increased significantly throughout the whole period of treatment and reached the highest value at the end of the third year of therapy. GH secretion parameters poorly correlated with pretreatment auxological data or response to treatment. Our long-term study confirms that in TS GH measurement is not useful in indicating hGH therapy or in predicting the response. 相似文献
292.
Summary The authors have studied the histochemical localization of acetylcholinesterase activity in the dog's ciliary ganglion by using the modified Koelle and Friedenwald technique. For better localisation of the structures stained by the histochemical method, some sections were in addition submitted to the Feulgen reaction, stained with Neutral red or impregnated according to the method of Bielschowsky.The results showed that if the pH of the incubating medium was 6,4, the pre- and postganglionic nerve branches as well as the nerve cell bodies react with a mean intensity only; the pericellular capsules, the sheathes formed by the satellite cells round the short processes and round the proximal part of the axone as well as the neurilemma of the nerve fibers between the ganglionic cells react as if they were the site of a very high enzymatic activity.At pH 5,2 of the incubating medium the authors observed the copper sulphide precipitate due to enzymatic activity to form a pattern resembling fibrillar woofs, sheathes, cords and rings of various dimensions; it now seems to be situated close to the ganglionic cell bodies and to the arches of its fenestrations and the precipitations appear to be in intimate contact with the deep side of the satellite cell sheath.The authors believe that the different results obtained in the first case may be explained by admitting that at pH 6,4 a massive staining of the satellite cells' capsules and sheathes may occur as the result of diffusion of the enzyme or of intermediate products from the preganglionic nerve fibers, which are the site of high acetylcholinesterase activity. 相似文献
293.
Elio Borghese 《Mycopathologia》1943,4(1):85-102
Résumé L'Auteur a étudié le cycle de la bactérie symbiote deBlattella germanica (L.) au cours de sa transmission éréditaire. Dans la fase de migration ovarienne, les bactéries font issue des bactériocytes de la femelle et franchissent, en un point encore mal connu, la paroi des tubes ovariens pour constituer une couche superficielle autour de l'oeuf.Au cours de la phase embryonnaire les bactéries convergent tout d'abord au centre du vitellus; puis lorsque à partir du mésoderme prennent naissance les lobes adipeux, les bactéries émigrent vers l'embryon, traversent l'entoderme et le sinus épineural et pénétrant dans le cytoplasme de diverses cellules mésodermiques transforment celles-ci en bactériocytes.
L'argomento di questa ricerca mi è stato suggerito dal Prof. Raffaele Ciferri, ordinario di Botanica in questa Università, come parte a me assegnata di un complesso di ricerche, in collaborazione, sui simbionti del blattidi. 相似文献
L'argomento di questa ricerca mi è stato suggerito dal Prof. Raffaele Ciferri, ordinario di Botanica in questa Università, come parte a me assegnata di un complesso di ricerche, in collaborazione, sui simbionti del blattidi. 相似文献
294.
Three new ligands for odorant-binding proteins (OBPs) have been prepared, to be used in protein structure studies: the photoaffinity label 2-azido-4-butyl-5-propylthiazole, the NMR probe 2-trifluoromethyl-4-butyl-5-propylthiazole and the X-ray probe 2-amino-4-butyl-5-propylselenazole. All three compounds bind the bovine OBP with dissociation constants in the micromolar range. 相似文献
295.
Sarah Abou Alaiwi Amin H. Nassar Elio Adib Stefan M. Groha Elie W. Akl Bradley A. McGregor Edward D. Esplin Shan Yang Kathryn Hatchell Vincent Fusaro Sarah Nielsen David J. Kwiatkowski Guru P. Sonpavde Mark Pomerantz Judy E. Garber Matthew L. Freedman Huma Q. Rana Alexander Gusev Toni K. Choueiri 《Cell reports》2021,34(13):108926
296.
Marisa Levi Paola Brusa Donato Chiatante Elio Sparvoli 《In vitro cellular & developmental biology. Plant》1993,29(2):47-50
Summary We used cultured pea embryo axes to study the effect of exogenous abscisic acid (ABA) on the reactivation of cell proliferation
at germination. ABA (100 μM) was administered in a complete medium or in a medium without KNO3 (the main source of K+ in the complete medium). In the presence of ABA, only a few meristematic root tip nuclei progressed through the cell cycle
during the first 24 h of germination. Compared to the control the percentage of G0/G1 cells remained high. In the absence of KNO3, the inhibitory effect of ABA on the cell cycle increased and the transition from G1 to S was almost completely inhibited after 24 h of germination. Moreover, the amount of a 47 kDa nuclear protein remained
high in embryos treated with ABA whereas it decreased in the control. 相似文献
297.
Elio Baldacci 《Mycopathologia》1943,4(1):60-84
Summary Before the modern definition of the genereActinomyces, Micromonospora andProacgtinomyces, a historical-critical review of Actinomycetes (ray-fungi), based on personal, present and past, researches, has been made. A modern, analytical key for all Families, Subfamilies and Genera of Actinomycetales Buchanan, has been furnished. Of particular-importance is the discussion on the reproductive bodies and on the general morphology, fundamental for the taxonomy of Actinomycetes.A few selected, most important species are accurately described (with sinonimy) and discussed from the historic-experimental points of view, namely:Actinomyces Bostroemi, A. albus, A. sulpureus, A. carneus, A. Madurae, A. viridis, A. melanosporeus, A. innominatus andProactinomyces asteroides.
Sumario El Autor, después de una sintesis histórico-critica sobre los Actinomicetos, en base a sus proprias buscas experimentales actuales y passadas, formula la moderne diagnosis de los génerosActinomyces, Micromonospora, Proactinomuces. etc., integrando, además, su estudio con una llave analitica moderna de todas las Familias, Subfamilias y Generos de los Actinomycetales Buchanan. De particular impprtancia es la discusión sobre la naturaleza de los cuerpos reproductivos de los Actinomicetos, y, màs generalmente, de la morfologia que está a la base de su sistematica.El Autor incluye la descripción cuidadosa de unas principales especies, reexaminadas desde el punto de vista historico-experimental, con sus ocmpleta sinonimia. Estas especies sonActinomyces Bostroemi, A. albus, A. sulphureus, A. carneus, A. Madurae,A. viridis, A. melanosporeus, A. innominatus, yProactinomyces asteroides.
Riassunto L'autore, dopo una sintesi storico-critica sugli Actinomiceti, sulla base di proprie ricerche sperimentali recenti e passate, formula la diagnosi moderna dei generiActinomyces, Micromonospora, Proactinomyces, ecc. fornendo inoltre una moderna chiave sistematica per tutte le Famiglie, Sottofamiglie, e Generi degli Actinomycetales Buchanan. Di particolare importanza è la discussione sulla natura dei corpi riproduttivi degli Actinomiceti ed in genere sulla morfologia che sta a base della sistematica.Include la descrizione accurata di alcune delle principali specie, revisionate dal punto di vista storico-critico e sperimentale; queste specie sono provviste della completa sinonimia (Actinomyces Bostroemi, A. albus, A. sulpkureus, A. carneus, A. Madurae, A. viridis, A. melanosporeus, A. innominatus, Proactinomyces asieroides).相似文献
298.
Cell cycle kinetic analysis with flow cytometry in pea root meristem synchronized with aphidicolin 总被引:2,自引:0,他引:2
Sergio Sgorbati Elio Sparvoli Marisa Levi Maria Grazia Galli Sandra Citterio Donato Chiatante 《Physiologia plantarum》1991,81(4):507-512
Meristematic cells in pea root were synchronized after treatment with aphidicolin. Flow cytometric analysis of DNA content variations revealed a variety of information: ca 50% of the cells were synchronized in the first part of the S phase; kinetic studies of the S-phase traverse revealed an increase of the DNA synthesis rate from early to late S; some of the cells in the meristem were non-cycling, arrested in Gl (19%) and G2 (12%). The possibility of using such a synchronized system in cytogenetic and biomolecular studies is discussed. 相似文献