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  • 1
    Electronic Resource
    Electronic Resource
    Shock response of pentaerythritol tetranitrate single crystals (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 70 (1991), S. 3572-3587 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The shock response of single crystals of the explosive pentaerythritol tetranitrate was studied from 3.4 to 19 GPa. Four orientations, 〈110〉, 〈001〉, 〈101〉, and 〈100〉 were studied. The shock Hugoniot and shock initiation sensitivities were measured in wedge tests. Intermediate velocity transitions were noted. A sensitivity anomaly near 4 GPa was discovered for 〈110〉 orientations. Chemiluminescent phenomena associated with this anomaly were studied using framing photography and uv/visible spectroscopy. Both plane-wave explosive and gas-gun impact experiments were done. Analysis of the steric hindrance occurring during edge dislocation motion in the shear flow associated with shock-induced uniaxial strain was done. The results corroborate the hypothesis that the orientation dependence of shock initiation sensitivity is due to the anisotropy of plastic flow, that is, the relative ease of slip in different orientations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.349253
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  • 2
    Electronic Resource
    Electronic Resource
    Location of sulfhydryl and disulfide groups in bovine .beta.-lactoglobulins and effects of urea (1972)
    s.l. : American Chemical Society
    Biochemistry 11 (1972), S. 4539-4547 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00774a017
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  • 3
    Electronic Resource
    Electronic Resource
    Integrated responses of hydraulic architecture, water and carbon relations of western hemlock to dwarf mistletoe infection (2004)
    Oxford, UK : Blackwell Science Ltd
    Plant, cell & environment 27 (2004), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Dwarf mistletoe (Arceuthobium spp.) is a hemiparasite that is said to be the single-most destructive pathogen of commercially valuable coniferous trees in many regions of the world. Although its destructive nature is well documented in many respects, its effects on the physiology of its host are poorly understood. In the present study, water and carbon relations were characterized over a range of scale from leaf to whole tree in large (40- to 50-m-tall) individuals of western hemlock (Tsuga heterophylla (Raf.) Sarg.) that were either heavily infected, or uninfected with hemlock dwarf mistletoe (Arceuthobium tsugense). Specific hydraulic conductivity (ks) of infected branches was approximately half that of uninfected branches, yet leaf-specific conductivity (kL) was similar because leaf area : sapwood area ratios (AL : AS) of infected branches were lower. Pre-dawn and minimum leaf water potential and stomatal conductance (gs) were similar among infected and uninfected trees because adjustments in hydraulic architecture of infected trees maintained kL despite reduced ks. Maximum whole-tree water use was substantially lower in infected trees (approximately 55 kg d−1) than in uninfected trees (approximately 90 kg d−1) because reduced numbers of live branches in infected trees reduced whole-tree AL : AS in a manner consistent with that observed in infected branches. Maximum photosynthetic rates of heavily infected trees were approximately half those of uninfected trees. Correspondingly, leaf nitrogen content was 35% lower in infected trees. Foliar δ13C values were 2.8‰ more negative in infected than in uninfected individuals, consistent with the absence of stomatal adjustment to diminished photosynthetic capacity. Adjustments in hydraulic architecture of infected trees thus contributed to homeostasis of water transport efficiency and transpiration on a leaf area basis, whereas both carbon accumulation and photosynthetic water use efficiency were sharply reduced at both the leaf and whole-tree scale.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.2004.01199.x
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  • 4
    Electronic Resource
    Electronic Resource
    Amino-acid Sequence about the Reactive Serine of a Proteolytic Enzyme from Bacillus subtilis (1960)
    [s.l.] : Nature Publishing Group
    Nature 187 (1960), S. 872-873 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A sample was treated with di^sopropylphosphoro-nuoridate labelled with phosphorus-32 at pH 7 -4 and a partial acid hydrolysate was subjected to ionophoresis on Whatman No. 52 paper at p~H. 3-5 in parallel with similarly treated chymotrypsin and liver ali esterase (sample kindly provided by Dr. E. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/187872a0
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  • 5
    Electronic Resource
    Electronic Resource
    Gene K , a new overlapping gene in bacteriophage G4 (1978)
    [s.l.] : Nature Publishing Group
    Nature 272 (1978), S. 510-515 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A third overlapping gene in the isometric bacteriophages has been identified by nucleotide sequence analysis of the G4 genome and by isolation and microsequence analysis of the new protein. Five nucleotides are used in all three translational reading frames of the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/272510a0
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  • 6
    Electronic Resource
    Electronic Resource
    Neutron Activation as a Means of Detecting Phosphoryl Peptides (1967)
    [s.l.] : Nature Publishing Group
    Nature 215 (1967), S. 410-411 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] This note reports a new procedure in which the protein is reacted with unlabelled reagent, the phosphorylated protein hydrolysed and the peptides separated by electro phoresis The peptides are then subjected to neutron irradiation on paper, whereby the phosphorus is made radioactive and can thus be ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/215410a0
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  • 7
    Electronic Resource
    Electronic Resource
    A chemical and enzymological comparison of the common major human erythrocyte carbonic anhydrase II, its minor component, and a new genetic variant, CA IIMelbourne (237 Pro→His) (1983)
    Springer
    Human genetics 〈Berlin〉 63 (1983), S. 392-399 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A new variant of human erythrocyte carbonic anhydrase II (CA II) was discovered in a single Caucasian family during routine screening of blood samples from Melbourne, Australia. The normal and variant enzymes in the heterozygous CA II mixture, as well as a minor component of the normal enzyme, were resolved by isoelectric focusing following purification by a specific affinity matrix. Specific esterase activities of all three were very similar, but quite different Michaelis-Menten constants were noted for the minor component. No differences were noted with respect to inhibition by acetazolamide, but the minor component was more sensitive to chloride inhibition. Double diffusion analysis showed the immunological identity of the normal, variant, and minor components. Both the variant CA II and the minor component were less heat stable than the normal enzyme, but all forms showed identical rates of inactivation upon dialysis against the zinc chelator pyridine dicarboxylic acid. Amino acid analyses of the whole protein and the single difference peptide were consistent with a proline to histidine substitution in the variant. This was identified as 237 Pro→His by a process of elimination involving direct sequencing of tryptic and cyanogen bromide peptides. The numbering is by homology with the human CA I sequence.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00274768
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  • 8
    Electronic Resource
    Electronic Resource
    Comparative studies of α-lactalbumin and lysozyme: The proteins of kangaroo (Megaleia rufa and Macropus giganteus) and horse (Equus caballus) (1980)
    Springer
    Molecular and cellular biochemistry 29 (1980), S. 3-9 
    Details
    ISSN: 1573-4919
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Summary As part of a study of the ‘whey’ proteins of various mammals, a comparison is made of the α-lactalbumins and lysozymes of the kangaroo and horse. In the milk of the red kangaroo (Megaleia rufa) there is only one α-lactalbumin and it occurs throughout lactation, but no lysozyme has been detected. There are two α-lactalbumins in the milk of the grey kangaroo (Macropus giganteus), one, designated α-lactalbumin Zone B, is present throughout lactation; the second, designated α-lactalbumin Zone A, is present only in late lactation. One lysozyme is also present. The milk of the horse (Equus caballus) contains one α-lactalbumin and at least one lysozyme. Partial amino acid sequences are proposed from sequence determination and from analyses of tryptic peptides compared with the known sequences of other α-lactalbumins and lysozymes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00230951
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  • 9
    Electronic Resource
    Electronic Resource
    Porcineβ-lactoglobulin A and C (1981)
    Springer
    Molecular and cellular biochemistry 35 (1981), S. 103-111 
    Details
    ISSN: 1573-4919
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Summary The occurrence of the dominant ‘whey’ protein in samples of milk from 1180 sows is examined. It exhibits genetic polymorphism with some unusual features. Although immunologically different from bovine β-lactoglobulin, it is shown by chemical studies of the isolated protein to be a β-lactoglobulin. Two homozygous genetic variants, designated porcine β-lactoglobulin A and C, are isolated and their amino acid compositions and peptide maps compared. It is shown that the C variant has +1 His, −1 Gln, and +1 Asp, −1 Glu, with respect to the A variant. These variants, containingca. 162 residues per molecule, are considered in relationship to porcine β-lactoglobulins isolated by other workers. The sequence of the first 50 residues is determined and compared with sequence of the bovine protein. The sequences ofca. 70% of the remaining residues is proposed on the basis of the composition of tryptic peptides and assumed homology.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02354824
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  • 10
    Electronic Resource
    Electronic Resource
    Porcineα-lactalbumin A and B (1981)
    Springer
    Molecular and cellular biochemistry 35 (1981), S. 113-119 
    Details
    ISSN: 1573-4919
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Summary The occurrence of the ‘whey’ protein, α-lactalbumin, in pig (Sus scrofus) milk samples from 904 sows is examined. A semi-discontinuous buffer system has been developed to detect the existence of genetic polymorphism. There are two homozygous variants, designated A and B. Both variants are isolated and it is shown by peptide and sequencing studies that the A variant differs from the B variant by having an Arg residue substituted for the Lys residue at the N-terminus of the molecule. The sequence of the first thirty residues is determined and compared with those of related α-lactalbumins.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02354825
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