74 research outputs found
Multi-methodical realisation of Austrian climate maps for 1971–2000
Constantly changing climate, the availability of a higher resolved digital
elevation model and further development of geostatistical interpolation
methods gave reason for updating the most frequently demanded climate maps
out of the Austrian digital climate atlas from 1961–1990 to 1971–2000. To
achieve a station density as high as possible, data from eleven national and
foreign institutes were collected and gap-filled. According to the climate
parameter, different geostatistical interpolation methods (including
regionalised multilinear regressions, geographically weighted regressions
and curve fitting to base parameter) were applied. The resultant 17 grids
concern 30-year-means of air temperature, precipitation and snow parameters
as well as derived indices. They are now available for a variety of
scientific and planning purposes
The primary structure of three hemoglobin chains from the indigo snake (Drymarchon corais erebennus, Serpentes): First evidence for αD chains and two β chain types in snakes
The hemoglobin of the indigo snake (Drymarchon corais erebennus, Colubrinae) consists of two components, HbA and HbD, in the ratio of 1:1. They differ in both their alpha and beta chains. The amino acid sequences of both alpha chains (alpha(A) and alpha(D)) and one beta chain (betaI) were determined. The presence of an alpha(D)chain in a snake hemoglobin is described for the first time. A comparison of all snake beta chain sequences revealed the existence of two paralogous beta chain types in snakes as well, which are designated as betaI and betaII type. For the discussion of the physiological properties of Drymarchon hemoglobin, the sequences were compared with those of the human alpha and beta chains and those of the closely related water snake Liophis miliaris where functional data are available. Among the heme contacts, the substitution alpha(D)58(E7)His-->Gln is unusual but most likely without any effect. The residues responsible for the main part of the Bohr effect are the same as in mammalian hemoglobins. In each of the three globin chains only two residues at positions involved in the alpha1/beta2 interface contacts, most important for the stability and the properties of the hemoglobin molecule, are substituted with regard to human hemoglobin. On the contrary, nine, eleven, and six alpha1/beta1 contact residues are replaced in the alpha(A), alpha(D), betaI chains, respectively
Superconductivity in the YIr2Si2 and LaIr2Si2 Polymorphs
We report on existence of superconductivity in YIr2Si2 and LaIr2Si2 compounds
in relation to crystal structure. The two compounds crystallize in two
structural polymorphs, both tetragonal. The high temperature polymorph (HTP)
adopts the CaBe2Ge2-structure type (space group P4/nmm) while the low
temperature polymorph (LTP) is of the ThCr2Si2 type (I4/mmm). By studying
polycrystals prepared by arc melting we have observed that the rapidly cooled
samples retain the HTP even at room temperature (RT) and below. Annealing such
samples at 900C followed by slow cooling to RT provides the LTP. Both, the HTP
and LTP were subsequently studied with respect to magnetism and
superconductivity by electrical resistivity, magnetization, AC susceptibility
and specific heat measurements. The HTP and LTP of both compounds respectively,
behave as Pauli paramagnets. Superconductivity has been found exclusively in
the HTP of both compounds below Tsc (= 2.52 K in YIr2Si2 and 1.24 K in
LaIr2Si2). The relations of magnetism and superconductivity with the electronic
and crystal structure are discussed with comparing experimental data with the
results of first principles electronic structure calculations
Intraerythrocytic organic phosphates and hemoglobins of skua - Catharacta maccormicki (Stercoraridae): at two different stages of the year in relation to Antartic migration
Tweaking the entrepreneurial orientation–performance relationship in family firms: the effect of control mechanisms and family-related goals
Molekulare Aspekte der Höhenatmung von Vögeln : Hämoglobine der Streifengans (Anserindicus), der Andengans (Chloephaga melanoptera) und des Sperbergeiers (Gyps rueppellii)
Survey Response Rates in Family Business Research
Although family business survey research is growing in volume and publication in highly regarded management journals, we do not yet have evidence on the usual response rates in this research and on the factors that impact these response rates. This paper addresses these voids and finds that the average response rates of family business survey studies published in seven prominent outlets amount to 21%. We also find that the response rates have declined significantly over time and that the size of the survey population and the establishment of contacts with survey addressees before sending out questionnaires are significantly associated with response rates. Such precontacts and reminders seem less fruitful for family respondents than for nonfamily respondents.(VLID)4844379Version of recor
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