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  • 1
    Online Resource
    Online Resource
    Assessment of Ore Deposit Settings, Structures and Proximity Indicator Minerals in Geological Exploration (2021)
    Cham :Springer International Publishing :
    Details
    Keywords: Mineralogy. ; Geology. ; Mineralogy. ; Geology.
    Description / Table of Contents: 1. Introduction -- 2. Geoscientific Data Acquisition -- 3. Assesment of the Regional Geological Setup -- 4. Geophysical Framework -- 5. Structural Setup.
    Abstract: This well-illustrated book aims to enhance observations and understanding of structural features and proximity-indicator minerals, critical in exploration. The book provides a unique blending of different content on observational and critical aspects of data acquisition, geological, structural, tectonic set-up, mineral deposit types, geophysical framework, and proximity indicator minerals. Combining these topics led to a comprehensive understanding to facilitate mineral targeting and exploration in green- and brown-field terrains. Besides field photographs, the write-up is lavishly supplemented with relevant geological and geophysical maps, tables, and case stories in field geology, making it useful for a much larger section of the geoscientific community professional geologists and geophysicists, students, teachers, and also decision-makers in geo-surveys and exploration.
    Type of Medium: Online Resource
    Pages: XIV, 389 p. 278 illus., 252 illus. in color. , online resource.
    Edition: 1st ed. 2021.
    ISBN: 9783030651251
    Series Statement: Springer Mineralogy,
    URL: https://doi.org/10.1007/978-3-030-65125-1
    DOI: 10.1007/978-3-030-65125-1
    DDC: 549
    Language: English
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  • 2
    Electronic Resource
    Electronic Resource
    Symbiotically defective histidine auxotrophs of Bradyrhizobium japonicum (1986)
    Springer
    Archives of microbiology 144 (1986), S. 334-339 
    Details
    ISSN: 1432-072X
    Keywords: Transposon mutagenesis ; Soybean ; Nitrogen fixation ; Root nodules ; Auxotrophy ; Bradyrhizobium japonicum ; Glycine ; Rhizobium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Four histidine auxotrophs of Bradyrhizobium japonicum strain USDA 122 were isolated by random transposon Tn5 mutagenesis. These mutants arose from different, single transposition events as shown by the comparison of EcoRI and XhoI-generated Tn5 flanking sequences of genomic DNA. The mutants grew on minimal medium supplemented with l-histidine or l-histidinol but failed to grow with l-histidinol phosphate. While two of the muants were symbiotically defective and did not form nodules on Glycine max cvs. Lee and Peking and on Glycine soja, the other two mutants were symbiotically competent. Reversion to prototrophy occurred at a frequency of about 10-7 on growth medium without added antibiotics, but prototrophs could not be isolated from growth medium containing 200 μg/ml kanamycin and streptomycin. The prototrophic revertants formed nodules on all the soybean cultivars examined. When histidine was supplied to the plant growth medium, both nodulation deficient mutants formed effective symbioses. On histidine unamended plants, nodules were observed infrequently. Three classes of bacterial colonies were isolated from such infrequent nodules: class 1 were kanamycin resistant-auxotrophs; class 2 were kanamycin sensitive-prototrophs; and class 3 were kanamycin-sensitive auxotrophs. Our results suggest that two Tn5 insertion mutations in B. japonicum leading to histidine auxotrophy, affect nodulation in some way. These mutations are in regions that show no homology to the Rhizobium meliloti common nodulation genes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00409881
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  • 3
    Electronic Resource
    Electronic Resource
    Propagation of a small disturbanc in aorta: a mathematical model (1988)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 10 (1988), S. 615-626 
    Details
    ISSN: 0392-6737
    Keywords: Haemodynamics ; pneumodynamics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto L'obiettivo di questo lavoro è fornire un modello matematico per la propagazione di un piccolo disturbo nell'aorta. Si è ottenuta un'equazione differenziale che regola la crescita ed il decadimento dei piccoli disturbi. Si è osservato che i disturbi da compressione possono aumentare in un'onda d'urto. Un modello matematico basato sulle proprietà geometriche e meccaniche dell'aortaammette disturbi negli impulsi in propagazione che non sono osservati in esseri umani in condizioni fisiologiche normali. Si è anche osservato che gli effetti di frizione devono respingere la tendenza alla formazione di urti nel modello. L'applicazione dei risultati al sistema arterioso umano mostra che forti disturbi o onde d'urto non si verificano in condizioni fisiologiche normali, mentre, nel caso di pressione aumentata in maniera patologica alla radice dell'aorta, si può sviluppare alla periferia una transizione tipo urto. Si sono ridiscussi alcuni casi speciali di un certo interesse.
    Abstract: Резюме Развивается математическая модель для описания распространения малого возмущения в аорте. Получается дифференциальное уравнение, определяющее образование и распад малых возмущений. Наблюдается, что импульсы сжатия могут превращаться в ударную волну. Математическая модель, которая основана на геометрических и механических с войствах аорты, допускает возмущения в распространяйщихся импульсах, котрые не наблюдаются человеком при нормальных физиологических условиях. В этой модели также наблюдается, что эффекты трения препятствуют образованию ударных волн. Применение полученных результатов к человеческой артериальной системе показывает, что сильные возмущения или ударные волны не возникают при нормальных физиологических условиях, хотя в случае патологически увеличенного давления может развиться переход типа ударной волны. Также обсуждаются некоторые специальные случаи, представляющие интерес.
    Notes: Summary The object of the present communication is to provide a mathematical model for the propagation of a small disturbance in the aorta. A differential equation governing the growth and decay of the small disturbance has been obtained. It is observed that the compressive pulses may grow into a shock wave. A mathematical model which is based on geometrical and mechanical properties of aorta admits disturbances in the propagating pulses which are not observed in human beings under normal physiological conditions. It is also observed that friction effects are to resist the tendency of shock formation in the model. The application of the results to the human arterial system shows that strong disturbances or shock waves are not expected under normal physiological conditions, while, in the case of a pathologically increased pressure rise at the root of aorta, shocklike transition may develop in the periphery. Some special cases of interest have also been discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02451102
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  • 4
    Electronic Resource
    Electronic Resource
    Plane and cylindrical shock waves in magnetogasdynamics (1986)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 7 (1986), S. 273-280 
    Details
    ISSN: 0392-6737
    Keywords: Plasma flow ; magnetohydrodynamics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Il metodo di Chisnell-Chester-Whitham è stato usato per studiare la propagazione di onde d’urto divergenti cilindriche e piane attraverso un gas ideale in presenza di un campo magnetico che ha solo componenti costanti assiali e azimutali, contemporaneamente per casi deboli e forti. Assumendo una distribuzione di densità iniziale ϱ0 = ϱ′r −W , dove ϱ′ è la densità al piano/asse di simmetria ew è una costante, si sono ottenute le espressioni analitiche per la velocità d’urto e la forza d’urto. Le espressioni per la pressione, la densità e la velocità delle particelle immediatamente dopo l’urto sono state determinate per entrambi i casi.
    Notes: Summary The Chisnell-Chester-Whitham method has been used to study the propagation of diverging plane and cylindrical shock waves through an ideal gas in the presence of a magnetic field having only constant axial and azimuthal components, simultaneously for both weak and strong cases. By assuming an initial density distribution ϱ0 = ϱ′r −W , where ϱ′ is the density at the plane/axis of symmetry andw is a constant, the analytical expressions for shock velocity and shock strength have been obtained. The expressions for the pressure, the density and the particle velocity immediately behind the shock have been derived for both the cases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02451248
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  • 5
    Electronic Resource
    Electronic Resource
    Guggulsterone E, a lipid-lowering agent from Commiphora mukulCDRI communication No. 6135. (2001)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 57 (2001), S. o285-o286 
    Details
    ISSN: 1600-5368
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The crystal structure of the title compound [4,17(20)-(cis)-pregnadiene-3,16-dione, C21H28O2] shows that the two molecules in the asymmetric unit have similar conformations. The fused-ring system contains one sofa, two chairs and one envelope. Weak intermolecular C—H...O hydrogen bonds, together with van der Waals interactions, stabilize the structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S1600536801003142
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  • 6
    Electronic Resource
    Electronic Resource
    Optimizing Assay and Extraction of Lipoxygenase in Wheat Germ (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 58 (1993), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Using three-level seven-factor response surface methodology, wheat germ lipoxygenase (LPO) assay conditions were standardized. The important parameters were concentration of the substrate (linoleic acid), and surfactant (Tween 20), pH and temperature. The standardized LPO assay conditions for the 1 mL reaction volume were : 450 μM linoleic acid, 129 μM Tween 20, 175 mM ethanol, 1 mM EDTA, pH 6.2 (phosphate buffer), ionic strength 100 mM and 40°C. LPO extraction conditions were standardized by sequential variation of parameters. Optimum conditions were a single extraction of defatted wheat germ flour at 2–5°C with magnetic stirring of an extractant acetate buffer pH 4.5, ionic strength 100 mM, at buffer-to-solid ratio 10:l.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1993.tb06121.x
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  • 7
    Electronic Resource
    Electronic Resource
    Thermal Inactivation Kinetics of Wheat Germ Lipoxygenase (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 58 (1993), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Thermal inactivation curves for wheat germ lipoxygenase (LPO) in partially purified and crude extracts were determined in capillary tubes at 60–68°C. The biphasic curves fitted a two-fraction first order model suggesting the presence of 2 groups of isozymes. At 60°C, the inactivation rate constants were 9.112 × 10−-5 set−1 and 9.174 × 10−-6 set−1 respectively, for thermolabile phase I and thermostable phase II in the partially purified extract, a difference of one order of magnitude. For the temperature change from 60 to 68°C, the rate constants increased by three orders of magnitude, implying a very high sensitivity (for LPO inactivation in partially purified extract ΔH
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1993.tb06122.x
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  • 8
    Electronic Resource
    Electronic Resource
    Photoelastic constants of cuprous halides
    Amsterdam : Elsevier
    Physics Letters A 71 (1979), S. 243-244 
    Details
    ISSN: 0375-9601
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9601(79)90175-0
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  • 9
    Electronic Resource
    Electronic Resource
    Chirping in light emitted by an assembly of two-level atoms
    Amsterdam : Elsevier
    Physics Letters A 65 (1978), S. 191-192 
    Details
    ISSN: 0375-9601
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9601(78)90143-3
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  • 10
    Electronic Resource
    Electronic Resource
    Investigation of wetting hydrodynamics using numerical simulations (1996)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 8 (1996), S. 302-309 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Meniscus shapes from a simulation of a plate immersing into an infinitely deep liquid bath, for a range of outer length scales, have been obtained numerically. These have been compared with the leading-order prediction from a three-region asymptotic analysis done in the double limit, Capillary number, Ca→0, LS/LC→0, with Ca ln(LC/LS) of O(1), where LS and LC represent the slip length and an outer macroscopic length, respectively. For Ca〈0.01, the numerically computed and the perturbation solutions show excellent agreement. Within this range of Ca, the meniscus slope at a distance 10LS from the dynamic contact line is geometry independent, that is, does not vary with changes in the outer length LC. The interface slope at this point can serve as an appropriate material boundary condition for the outer problem. For 0.01〈Ca〈0.1, the intermediate region solution continues to closely fit the numerically generated solution, while the match in the outer region begins to degrade. By monitoring the pressure difference between the surrounding inviscid gas phase and arbitrarily chosen point in the liquid, we attribute this breakdown to infiltration of viscous effects into the outer region, so that static capillarity does not adequately describe meniscus shapes in this regime. For Ca(approximately-greater-than)0.1, there is no match between the numerical and perturbation solutions in both the intermediate and outer regions, indicating that higher-order contributions must be accounted for in the perturbation solutions. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.868840
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