ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Isoelectric focussing (IEF) in carrier ampholyte-generated pH gradients and hybrid isoelectric focussing (HIEF) in immobilized pH gradients under nondenaturing conditions were used in parallel to screen 5,500 plasma samples for naturally occurring variants of apolipoprotein A-I (apo A-I). The following defects were identified in four unrelated subjects heterozygous for apo A-I variants: apo A-I(ΔK107)(2 ×), apo A-I(K107M)(1 ×), and apo A-I(E41R)(1 ×). The later variant is a novel finding. Family studies did not reveal any association of apo A-I(K107M) and apo A-I(E41R) with dyslipidemia, but identified several heterozygotes for apo A-I(ΔK107) who had low levels of high density lipoprotein (HDL)cholesterol. Therefore, and since the apo A-I(ΔK107) is the most frequent apo A-I variant in Germany (1 ∶ 5,000) we evaluated our data and that reported from 11 families with 32 heterozygous carriers and 30 unaffected controls. This analysis revealed that apo A-I(ΔK107) is associated with lower HDL-cholesterol (-30%) and higher triglycerides (+ 48%) in men but not in women as compared with unaffected family members as well as with controls from the Prospective Cardiovascular Münster (PROCAM) study. Moreover, 11 of 15 male apo AI(ΔK107) heterozygotes but only 2 of 17 female apo AI(ΔK107) heterozygotes had HDL-cholesterol levels below the 20th percentile of sex-matched controls from the PROCAM study. We conclude that heterozygosity for apo A-I(ΔK107) decreases HDL-cholesterol and increases triglycerides in men but not in women.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 62 (1997), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: To develop a new Oriental-style dairy product, the characteristics of culture filtrate from lao-chao with Rhizopus oryzae, used as a milk-clotting agent, and factors (heat-treatments, calcium, sucrose, and curdling temperature) affecting curd firmness were determined. The optimal conditions for proteolytic activity were around 40°C and pH 3. No activity was detected over the range of pH 8 to 11. After high-heat treatment (121°C, 15 min) on skim milk, no clotting was observed. Sucrose resulted in the retardation of milk-clotting. Ca++ could be used to increase curd firmness which also increased from 29. 2–2.8g to 80. 3–4.7g when the curdling temperature was increased from 25°C to 45°C.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 110 (1999), S. 5403-5411 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Evaluating and understanding the performances of magnetic colloids as contrast agents for MRI requires a theory describing their magnetic interactions with water protons. The field dependence of the proton longitudinal relaxation rate (nuclear magnetic relaxation dispersion profiles) in aqueous colloidal suspensions of superparamagnetic particles is based on the so-called Curie relaxation, which essentially accounts for the high field part of the NMRD profiles (B0〉0.02 T). The low-field part of the NMRD profiles can only be explained by the crystal's internal anisotropy energy, a concept which clarifies the important difference between superpara- and paramagnetic compounds: the anisotropy energy modifies both the electronic precession frequencies and the thermodynamic probability of occupation of the crystal magnetic states. Our theory clearly explains why a low-field dispersion exists for suspensions of small size crystals, and why it does not for large crystals' suspensions. This important effect is due to the Boltzmann factors depending on the anisotropy energy, which is itself proportional to the particle volume. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 80 (1996), S. 2388-2395 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We present in this work the results of a Raman spectroscopy study on the plasmon–phonon coupling in Ge-doped p-type gallium arsenide. A series of polarized Raman scattering experiments were carried out on epitaxial films grown by liquid-phase epitaxy on (100) GaAs substrates at 20, 100, and 300 K. The films were p type with free hole densities varying in the range of 5×1017–1×1020 cm−3. Under the scattering configurations employed, the longitudinal optical (LO) mode is forbidden for crossed polarization while the transverse optical (TO) mode is forbidden for both parallel and crossed polarizations. However, all the polarized Raman spectra showed two peaks with frequencies close to the TO and LO phonons of semi-insulating GaAs. The appearance of such forbidden modes was accounted for with a theoretical model which considers phonon–plasmon coupled modes with wave vectors much larger than those given by the regular q≈0 wave vector transferred by photons. Ionized acceptor impurities provide such additional wave vector transfer through elastic scattering of the photoexcited electrons and holes. It is demonstrated that the experimental values for position and linewidth of the peaks are well described by the theoretical calculations when Fröhlich-type and deformation potential mechanisms are considered as means of interaction. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Crop science 38 (1998), S. 1210-1213 
    ISSN: 1435-0653
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Buchloë dactyloides (Nutt.) Engelm.] is often difficult because improper timing can result in weed interference or stand failure. Research was conducted to determine optimal buffalograss seeding dates and growing degree day (GDD) requirements for 'Cody' and 'Texoka' buffalograss establishment. Both cultivars were seeded monthly at 10 g burs m-2 from April through October in 1995 at the John Seaton Anderson Turfgrass Research Facility near Mead, NE, and at the Greenville Research Farm at Logan, UT. The soil types at the Nebraska and Utah sites were Sharpsburg silty clay loam (fine, montmorillonitic, messic Typic Argiudoll) and Millville silt loam (coarse-silty, carbonatic, mesic Rendoll), respectively. The percentages of buffalograss and weed cover were rated visually on a 0 to 100% scale. Buffalograss density was determined by tossing either a 0.1- or 0.2-m-2 quadrat into the plot and counting the number of plants in the quadrat. The experimental design was a randomized incomplete block design with three replications. Location, buffalograss cultivar, and planting date were treatment factors. The optimal seeding time for buffalograss at the Nebraska site was late April through June and at the Utah site, April through July. August, September, and October planting dates at both sites did not result in successful stands. The negative relationship between the percentage of weed cover and the percentage of buffalograss cover implicated weed interference as a factor limiting establishment. Our results indicate that to ensure survival and establishment of buffalograss in regions where soils freeze during the winter, at least 1000 postplanting GDD are required before cessation of growth in the fall.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Pharmaceutical research 16 (1999), S. 672-675 
    ISSN: 1573-904X
    Keywords: viscosity ; glass ; amorphous ; thermomechanical analysis ; TMA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Purpose. To evaluate thermomechanical analysis (TMA) as a technique for determining the viscosity of amorphous pharmaceutical materials. This property of amorphous drugs and excipients is related to their average rate of molecular mobility and thus to their physical and chemical stability. Methods. Indomethacin was selected as a model amorphous drug whose viscosity has previously been reported in the literature. A Seiko TMA 120C thermomechanical analyzer was utilized in isothermal penetration mode to determine the viscosity of the amorphous drug over the maximum possible range of temperatures. Results. Using a cylindrical penetration geometry it was possible to accurately determine the viscosity of amorphous indomethacin samples by TMA over the temperature range from 35 to 75°C. The results were consistent with those reported in the literature using a controlled strain rheometer over the range 44−75°C. The limiting lower experimental temperature for the TMA technique was extended to significantly below the calorimetric glass transition temperature (Tg ≈ 42°C), thus allowing a direct experimental determination of the viscosity at Tg to be made. Conclusions. Thermomechanical analysis can be used to accurately determine the viscosity of amorphous pharmaceutical materials at temperatures near and above their calorimetric glass transition temperatures.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    ISSN: 1617-4623
    Keywords: Key words Clonal analysis ; Imaginal discs ; Cell proliferation ; P elements
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We have carried out screens for lethal mutations on the second chromosome of Drosophila melanogaster that are associated with abnormal imaginal disc morphologies, particularly in the wing disc. From a collection of 164 P element-induced mutations with a late larva/pupa lethal phase we have identified 56 new loci whose gene products are required for normal wing disc development and for normal morphology of other larval organs. Genetic mosaics of these 56 mutant lines show clonal mutant phenotypes for 23 cell-viable mutations. These phenotypes result from altered cell parameters. Causal relationships between disc and clonal phenotypes are discussed.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Journal of network and systems management 6 (1998), S. 113-133 
    ISSN: 1573-7705
    Keywords: CMIP/CMIS ; OSI SYSTEMS MANAGEMENT ; SNMP/SNMPv2 ; TMN ; X.25
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract OSI systems management is a set of standards forthe management of open systems. Its acceptance by theindustry has been slower than that of SNMP, due to itsrelative complexity. However, it is gathering more and more momentum due to the increasingavailability of development tool kits and also due tothe real world implementations which have followed theuse in TMN. This paper contrasts OSI systems management to SNMP and TMN. It identifies the salientcharacteristics of OSI systems management and uses themas bases for the comparison. Aspects of X.25 managementare used for illustration purpose. OSI system management is half way between SNMP and TNM. It offersmore than SNMP, but less than TMN. SNMP, OSI systemsmanagement and TMN tackle different classes ofmanagement problems. None is a panacea andinteroperability is the key issue.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Journal of network and systems management 7 (1999), S. 267-270 
    ISSN: 1573-7705
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Integral equations and operator theory 21 (1995), S. 319-333 
    ISSN: 1420-8989
    Keywords: 45E05 ; 45L05 ; 65R20
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract A finite section method for the approximate solution of singular integral equations with piecewise continuous coefficients on intervals is considered. The problem is transformed in such a way that results which were previously obtained for singular integral equations on the unit circle using localization methods in Banach algebras are applicable to it. Thus, necessary and sufficient conditions for the stability of the approximation method can be proved.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...