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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 30 (1974), S. 0 
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Kharkov 22 M.C. winter wheat was grown continuously from seed under four temperature regimens; 2°C; 2°C then transferred to 20°C; 6°C, and 20°C. Plants were harvested at the 4-leaf stage (except the 2°C plants which were harvested at the 3-leaf stage) and the levels of endogenous gibberellins (GAs) were measured and their cold hardiness determined. The GA content of 20°C and the 6°C seedlings were about equal and greater (by 4- to 30-fold) than the GA content of 2°C seedlings that had been transferred to 20°C (i.e. vernalized). The GA content of the 2°C seedlings was least of all, being 28- to 320-fold less than the 20°C seedlings. At harvest the leaves of the 20°C seedlings were somewhat larger than those of the seedlings grown at 2°C and transferred to 20°C. The leaves of the 6°C seedlings were very much smaller and the leaves of the 2°C seedlings were smallest of all.It is concluded that while GAs may play a role in controlling leaf size and level of cold hardiness of wheat, they are not the most important factor.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Calcified tissue international 12 (1973), S. 101-112 
    ISSN: 1432-0827
    Keywords: Ageing ; Osteoporosis ; Bone ; Muscle ; Fat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Description / Table of Contents: Résumé Des mesures radiologiques de la masse minérale osseuse de la partie proximale du radius et l'épaisseur du muscle et du tissu graisseux sous-cutané de l'avant-bras ont été relevées chez l'homme et la femme adultes normaux. La masse minérale osseuse ne montre pas de modification significative jusqu'à 60 ans chez l'homme et 50 ans chez la femme, puis on observe une chute. L'épaisseur musculaire décroit, chez l'homme, à partir de 30 ans, alors que chez la femme on n'observe aucune modification significative avant 60 ans. Les corrélations entre ces variables diffèrent selon le sexe. Alors que la masse minérale et l'épaisseur musculaire varient positivement chez l'homme en fonction de l'âge, il n'y a pas de rapport significatif chez la femme, après 60 ans. Cependant, chez ces dernières, la masse osseuse et le tissu graisseux sous-cutané sont en corrélation nette après 60 ans, bien qu'aucun rapport significatif ne soit noté chez l'homme quel que soit le groupe d'âge. Chez des sujets ostéoporotiques, la masse minérale osseuse et l'épaisseur musculaire sont plus faibles chez les hommes par rapport à des sujets normaux du même âge. Chez des femmes ostéoporotiques, cependant, bien que la masse minérale osseuse et le tissu graisseux sous-cutané soient inférieures par rapport à des sujets normaux, l'épaisseur du muscle n'est pas modifiée.
    Abstract: Zusammenfassung Es wurden bei gesunden erwachsenen Männern und Frauen radiologische Messungen der Knochenmineralmasse im proximalen Radius, der Dicke des Muskels und des subkutanen Fettes des Vorderarmes durch die ganze Altersspanne durchgeführt. Die Knochenmineralmasse zeigte keine signifikante Veränderung bis zum 60. Altersjahr bei den Männern und bis zum 50. Altersjahr bei den Frauen; dann jedoch sank sie ab. Die Muskeldicke nahm bei den Männern über 30 Jahren ab, bei den Frauen konnte jedoch eine signifikante Abnahme erst ab 60 Jahren festgestellt werden. Die Korrelation zwischen diesen beiden Werten war bei Männern und Frauen ebenfalls verschieden. Während bei den Männern Knochenmineralmasse und Muskeldicke in jedem Alter meistens eine positive Korrelation zeigte, konnte bei den Frauen nach dem 60. Altersjahr keine signifikante Korrelation gefunden werden. Bei den Frauen zeigten hingegen Knochenmasse und subkutanes Fett eine deutliche Korrelation in der Gruppe nach dem 60. Altersjahr, während bei den Männern in keiner Altersgruppe eine signifikante Korrelation gefunden werden konnte. In einer osteoporotischen Gruppe waren Knochenmineralmasse und Muskeldicke niedriger bei Männern, verglichen mit Kontrollen bei Gesunden desselben Alters. Bei weiblichen osteoporotischen Patienten hingegen zeigte die Muskeldicke keinen Unterschied, während Knochenmineralmasse und subkutanes Fett niedriger waren als bei Gesunden.
    Notes: Abstract Radiologic measurements of bone mineral mass in the proximal radius, muscle width and thickness of the subcutaneous fat of the forearm were studied in normal men and women throughout the adult age range. Bone mineral mass showed no significant change to age 60 in men and age 50 in women, but fell thereafter. Muscle width declined from age 30 in the male population, though no significant reduction was found in women before age 60. The correlations between these variables also differed between males and females. While bone mineral mass and muscle width tended, in males, to be positively correlated at all ages, in females no significant correlation was found after age 60. In females, however, bone mass and subcutaneous fat were distinctly correlated in the over 60 age group, though no significant correlation was found in males in any age group. In an osteoporotic group, bone mineral mass and muscle width were lower in male patients than in normals of similar age. In female osteoporotic patients, however, while bone mineral mass and subcutaneous fat were less than in normals, muscle width showed no difference.
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  • 3
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary An extract from 6000 dark-grown Phaseolus coccineus seedlings was purified by countercurrent distribution and G-10 Sephadex followed by gradient elution from a silicic acid partition column with increasing amounts of ethyl actetate in n-hexane. 25 fractions were collected and tested with the barley-aleurone, ‘Tan-ginbozu’ dwarf-rice, lettuce, cucumber, dwarf-pea, d-1, d-2, d-3 and d-5 maize, oat first-internode, and sugarcane-spindle bioassays. Major gibberellin (GA)-like activity was detected in fractions 4 (500μg GA3-equivalents) and 12–13 (270 μg GA3-equivalents) with smaller amounts in fractions 6, 8–9, 15–16, 18, 20, 23 and 25. The extracts were also applied to AMO-1618=dwarfed Ph.-coccineus seedlings. Fractions 4, 8 and 12 promoted the growth of both light- and dark-grown seedlings. GA1, GA3, GA4 and GA8 were active in the Phaseolus bioassay but GA8-glucoside was inactive. The biological and chromatographic properties of fractions 4, 8–9 and 12–13 correspond with those of GA4, GA19 and GA1. The identity of GA4 in fraction 4 was conclusively established by combined gas chromatography-mass spectrometry (GC-MS) of the methyl ester and the trimethylsilyl ether of the methyl ester. Gasliquid-chromatography peaks corresponding to these derivatives of GA19 and GA1 were detected on QF-1 and SE-33 columns but their intensities were too weak to permit conclusive identification by GC-MS.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Planta 94 (1970), S. 95-106 
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Pea seedlings (cv. Alaska), were treated with two concentrations of (2-chloroethyl)trimethylammonium chloride (CCC) and choline chloride. Treatment with 1 mg/l CCC resulted in as much as a 150fold increase in endogenous gibberellin (GA) levels without there being any parallel stimulation of growth. Plants grown in 1,000 mg/l CCC were severely dwarfed but contained GA levels not significantly different from control plants grown in distilled water. CCC also retarded GA3-induced growth of pea seedlings. These effects appear to be CCC specific as the CCC analogue choline chloride affected neither the GA content of pea seedlings nor their response to GA3. The lack of correlation between endogenous GA levels and stem height suggests that in peas the predominant factor in CCC-induced inhibition of stem growth is not related to an effect of CCC on GA biosynthesis.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Irradiation of homogenates of etiolated barley leaves with red light resulted in an increase in the levels of gibberellin (GA)-like substances as compared to dark controls. When homogenates were fed with [3H]-GA9 there was as incorporation of the radioactivity into a number of other GA's: this process occurred to a greater extent in red light than in darkness, and could be inhibited by boiling the extract prior to addition of the [3H]-GA9.
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  • 6
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Abscisic acid was characterized from extracts of isolated pea chloroplasts by combined gas-chromatography-mass spectrometry. By single ion monitoring of the base peak (m/e 190) in the mass spectrum, 8.6 μg ABA were detected in chloroplasts isolated from 1 kg fresh weight of pea shoots.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Planta 111 (1973), S. 261-266 
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Treatment of waterlogged tomato plants with benzyladenine relieved most of the symptoms of flooding injury. The effects of benzyladenine included maintenance of chlorophyll levels, reduced epinastic curvature of petioles, absence of adventitious roots, and stem growth greater than that of waterlogged control plants.
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Journal of solution chemistry 1 (1972), S. 3-16 
    ISSN: 1572-8927
    Keywords: Aqueous ; cyclic ethers ; carbohydrates ; inositols ; apparent molal volume ; apparent molal compressibility ; density
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Apparent molal volumes and compressibilities are reported for dilute aqueous solutions of cyclic ethers, simple carbohydrates, and related polyhydroxy compounds. The results for carbohydrates are considered in the light of two theoretical descriptions of such systems, i.e., the semiideal solution approach of Stokes and Robinson, and the McMillan-Mayer theory ty[e of approach as employed by Kozak, Knight, and Kauzmann. It is concluded that neither model is satisfactory, and that for these solutions a specific hydration model, described in more detail in another paper, is more satisfactory.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Journal of solution chemistry 2 (1973), S. 99-118 
    ISSN: 1572-8927
    Keywords: Heats of solution ; heat capacity ; dipole moments ; static permittivity ; carbohydrates ; dielectric relaxation ; sugar conformation ; alcohols
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The effect of hydroxyl substitution on the nature of the hydration of an alkane chain has been studied by calorimetric techniques. Static permittivities (ɛ0) of a range of monosaccharides and related compounds in aqueous solution have also been determined. The (ɛ0) data, suitably processed, have provided information about the solute dipole moments. In conjunction with earlier results from volumetric, compressibility, and relaxation studies, the specific hydration model is further developed and the relationships between solute molecular conformations and solute-water interactions are discussed.
    Type of Medium: Electronic Resource
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  • 10
    Publication Date: 1973-12-01
    Print ISSN: 1073-5623
    Electronic ISSN: 1543-1940
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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