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  • 11
    Electronic Resource
    Electronic Resource
    An improved vacuum collector for fungal spores (1980)
    Springer
    Cellular and molecular life sciences 36 (1980), S. 626-627 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary An all-glass improved vacuum collector for fungal spores is described and its merits mentioned. The description of the required components is also given. This vacuum collector combines the merits of smaller dimension and greater efficiency by accommodating Conway Diffusion cells in the spore receiving vessel.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01965844
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  • 12
    Electronic Resource
    Electronic Resource
    Colchicine induced chromosomal interchange in castor beans (Ricinus communis linn.) (1968)
    Springer
    Cellular and molecular life sciences 24 (1968), S. 1037-1037 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung In mit Colchicin behandelten Pflanzen vonRicinus communis wurden neben tetraploiden Zellen auch solche mit Chromocomenbrüchen gefunden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02138732
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  • 13
    Electronic Resource
    Electronic Resource
    Amylase and polyphenol oxidase production by germinating conidia ofColletotrichum falcatum Went (1968)
    Springer
    Cellular and molecular life sciences 24 (1968), S. 117-118 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Keimende Konidien vonColletotrichum falcatum bilden Amylase und Polyphenoloxydase. Die Enzymproduktion ist bei einem «Lichtstamm» höher als bei einem «Dunkelstamm».
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02146930
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  • 14
    Electronic Resource
    Electronic Resource
    Epistatic, additive and dominance variation in a triple test cross of bread wheat (Triticum aestivum L.) (1982)
    Springer
    Theoretical and applied genetics 62 (1982), S. 49-52 
    Details
    ISSN: 1432-2242
    Keywords: Epistasis ; Triple test cross ; Triticum aestivum L.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Triple test cross progenies resulting from the crossing of three testers (‘Kloka’, ‘UP 368’ and an f1 intermediate between them) and 24 varieties of bread wheat have been studied for plant height (cm), peduncle length (cm), ear length (cm), number of spikelets per spike and harvest index (ratio between economic and total yield). Epistasis was not significant for any of the characters studied. The testers were inadequate for plant height and for peduncle length although the testers varied considerably for these traits. Additive variance played a significant role in the inheritance of all the characters except number of spikelets per spike. The dominance variance was important for plant height, ear length and harvest index. The degree of dominance was in the over-dominance range for plant height. Complete dominance was operative for ear length, number of spikelets per spike and harvest index whereas for peduncle length only partial dominance was observed. The possibility of the isolation of the recombinants with high harvest index has been stressed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00276282
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  • 15
    Electronic Resource
    Electronic Resource
    On the possibility of the existence of NO+ in interstellar space (1980)
    Springer
    Astrophysics and space science 68 (1980), S. 87-97 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Frequencies are computed for transitions in the NO+ ion which are expected to occur in the millimeter and infrared regions usually covered by millimeter-wave and infrared astronomy. The emission cross-sections and spontaneous emission rates of the microwave transitions of NO+ ion are presented. The NO+ molecule is likely to be detectable in low-temperature sources whose state temperatures are not greater than 15 K. Transition probabilities and oscillator strengths for the Δv=1, 2, 3 and 4 vibration-rotation bands are derived from published theoretical dipole moment functions, obtained by an accurate multi-configuration self-consistent field procedure, in the1∑ ground state of NO+ ion. On the basis of binary gas phase reactions, the formation and destruction of NO+ in interstellar space are also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00641645
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  • 16
    Electronic Resource
    Electronic Resource
    The 3410 Å band of the PH molecule in the solar photospheric spectrum (1984)
    Springer
    Solar physics 90 (1984), S. 259-268 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Some weak unidentified solar photospheric lines in the wavelength range: (3400–3465) Å may be due to PH lines of the (0, 0) band of the PH(A 3 Π i - X 3 ∑-)system. These faint PH molecular lines have resulted an excitation temperature of the order of 4500 K. Using experimental lifetime data for PH in the A 3 Π i state, an absorption oscillator strength f 00 = 0.0075 is derived for the 3410 Å band of the PH (A 3 Π i - X 3 ∑-)system. Accurate line positions, oscillator strength and transition probability for the 4.4μ fundamental rotation-vibration band of the PH molecule are obtained. A comparison of positions of some lines of the 4.4μ band with those obtained on new tracings of high resolution solar spectra shows many coincidences with weak solar lines.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00173954
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  • 17
    Electronic Resource
    Electronic Resource
    Fluctuating boundary layers in combined convection flows along a vertical surface (1980)
    Springer
    Czechoslovak journal of physics 30 (1980), S. 790-804 
    Details
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The effect of buoyancy force on laminar boundary layer in two dimensional flow and heat transfer along a semi-infinite vertical surface, when the velocity of the on-coming stream oscillates in magnitude about a steady mean, is analysed. Two separate solutions valid for low and high frequency ranges are developed. It is found that for low frequency oscillations the phase angles of oscillatory components of skin friction and the rate of heat transfer increase as the Grashof number increases. For very high frequencies, the velocity field is of shear-wave type unaffected by the mean flow; the phase lead in the skin friction is, then, π/4 and the rate of heat transfer fluctuation indicates a phase lag of π/2 over that of the free stream oscillations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01599913
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  • 18
    Electronic Resource
    Electronic Resource
    Thermodynamic method to two dimensional stagnation flow and heat transfer (1981)
    Springer
    Czechoslovak journal of physics 31 (1981), S. 32-40 
    Details
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The purpose of this paper is to develop a variational technique, using the variational principle of non-equilibrium thermodynamics for the solution of laminar stagnation point flow and heat transfer in two dimensions. The governing principle of dissipative processes is formulated for the problem and then using the boundary conditions of the system the elementary trial functions of third degree are assumed for the flow and temperature fields in the vicinity of the wall. The viscous and thermal boundary layer thicknesses, the skin friction and the rate of heat transfer from the wall to the fluid are obtained. It is found that these new approximate results are quite close to the exact known ones. These results are better than those of the Kármán-Pohlhausen technique.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01604429
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  • 19
    Electronic Resource
    Electronic Resource
    24MgH+ in the solar photospheric spectrum (1984)
    Springer
    Astrophysics and space science 102 (1984), S. 287-293 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The24MgH+ (A 1Σ+ −X 1Σ+) molecular lines have been identified in the photospheric spectrum. The rotational excitation temperature determined from the analysis of molecular line intensities of24MgH+ is found to be of the order of 4850 K which corresponds to the photospheric temperature of the Sun. The CNDO/2 dipole moments of24MgH+ for internuclear distance range: (1.3–2.1) Å in theX 1Σ+ state can be approximated byM(R)=4.92+1.33R. Estimations for the spontaneous emission Einstein coefficients (A v′ v″ ) and the absorption oscillator strengths (f v′ v″ ) for the (1, 0), (2, 0), and (2, 1) transitions in theX 1Σ+ state of the24MgH+ ion are also made.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00650177
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  • 20
    Electronic Resource
    Electronic Resource
    Study on the thermal behaviours of homo- and copolymers of styrene, MA and AN by thermogravimetry (1982)
    Springer
    Journal of thermal analysis and calorimetry 25 (1982), S. 387-390 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Basierend auf nicht-isotherme thermogravimetrische Untersuchungen wurde das thermische Verhalten von Polystyrol [PS], Polymethacrylat [PMA], Polyacrylnitril [PAN], Polystyrol-co-methacrylat [P(S: MA)] (alternierend und random), Polystyrolco-acrylnitril [P(S: AN)] (alternierend) sowie eines Mischpolymeren von Styrol, Methacrylat und Acrylnitril [P(S: MA: AN)] untersucht. Die thermische Stabilität der Kopolymeren liegt zwischen denen der individuellen Homopolymeren. Die thermische Stabilität des Kopolymeren [P(S: AN)] ist höher als die der individuellen Homopolymeren. Die Werte der Aktivierungsenergie sind ebenfalls in Übereinstimmung mit dem thermischen Verhalten dieser Polymere.
    Abstract: Резюме На основе неизотерми ческих термогравиметричес ких исследований, обс уждено термическое поведен ие полистирола, полиметилакрилата, п олиакриронитрила, ко полимера полистирола и метила крилата (чередующего ся и произвольного), копол имера полистирола (чередующе- гося), и трех звенного полимера стирол-метилакрилат-акрилонитрил. Найден о, что термическая усто йчивость кополимеро в является промежуточной среди индивидуальных гомополимеров. Устой чивость трехзвенног о полимера стирол-мети лакрилатакрилонжтр ил является наиболее вы сокой по сравнению с отдельными гомополи мерами. Значения энергии активации со гласуются с термичес ким поведением исследов анных полимеров.
    Notes: Abstract The thermal behaviours of polystyrene (PS), polymethylacrylate (PMA), polyacrylonitrile (PAN), polystyrene-co-methylacrylate [P(S: MA)](alternate and random), polystyrene-co-acrylonitrile [P(S: AN)] (alternate) and a terpolymer of styrene, methylacrylate and acrylonitrile [P(S: MA: AN)] are discussed on the basis of non-isothermal thermogravimetric studies. The thermal stabilities of the copolymers have been found to be intermediate between of those of the individual homopolymers. The stability of the [P(S: AN)] copolymer is higher than those of the individual homopolymers. The activation energy values are also in accordance with the thermal behaviours of these polymers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01912964
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