Der Gehölzbestand der Auenwälder nach subfossilen Holzresten aus holozänen Sedimenten mitteldeutscher Flußauen     

Wolfgang R. Müller-Stoll  Herbert Süß 《Genetic Resources and Crop Evolution》1966,14(1):201-233

Zusammenfassung Aus Sedimenten des älteren und jüngeren Holozän der Flußauen in der Umgebung von Leipzig stammende subfossile Holzreste wurden untersucht. Sie gehören zu folgenden Gehölzgattungen:Abies, Salix, Populus, Alnus, Corylus, Quercus, Ulmus, Acer, Fraxinus undSambucus. Mit Ausnahme eines Holzes vonAbies alba sind alle Reste als autochthon anzusehen. Sie spiegeln die Zusammensetzung des natürlichen Gehölzbestandes der ursprünglichen Auenvegetation wider. Vorherrschend sind Holzreste vonSalix undQuercus robur; sie sind die Haupt-Holzarten des Silberwiden-Auenwaldes einerseits und des Eichen-Ulmen-Auenwaldes andererseits. Bemerkenswert ist das Vorkommen der Rotbuche unter den Holzarten der Aue. Die Funde bestätigen, daß die Auenvegetation des Gebietes vor ihrer fast vollständigen Verdrängung durch Kultur- und Meliorationsmaßnahmen im wesentlichen den gleichen Gehölzbestand hatte, wie er sich anhand der heute noch vorhandenen spärlichen Restbestände rekonstruieren läßt.

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Summary Subfossile wood relics originating from sediments of the older and younger holocene of river warp plains near Leipzig proved to belong to following genera:Abies, Salix, Populus, Alnus, Corylus, Quercus, Ulmus, Acer, Fraxinus, Sambucus. With exception of one wood sample ofAbies alba all fossils are to be regarded as autochthonous representing the natural wood stock of the ancient river warp vegetation. Within ourmaterial specimens ofSalix andQuercus robur prevail being the main wood species of the silver-willow warp forest and the oak-elm warp forest respectively. Attention deserves the presence of beech among the wood species of the river warp forests. The findings verify that warp vegetation of the region before the nearly complete displacement of natural forests by cultivation and amelioration had substantially the same wood stock as it may be reconstructed from surviving recent stands being very scarce and more or less degraded.

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am ¶rt;au . :Abies, Salix, Populus, Alnus, Corylus, Quercus, Ulmus, Acer, Fraxinus Sambucus. , Abies alba . . Salix Qu. robur; , , - . ¶rt; . ¶rt; , , , .

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A comparative study of the complement fixation test for mycoplasma hyopneumoniae in SPF and non-SPF herds of swine in Illinois     

George T. Woods  Herbert S. Wright  Billie O. Blackburn 《Veterinary microbiology》1976,1(4):459-465

Serum samples from 458 swine from eight specific pathogen-free (SPF) herds swine were compared to samples from 178 swine from eight non-SPF herds in Illinois using the complement fixation (CF) test for Mycoplasma hyopneumoniae antibodies. In SPF herds, 9.4% of the samples gave positive test results, compared to 51.7% of the samples from non-SPF herds. The range of reactor rates in SPF herds was 0–26.9% and in non-SPF herds 3.4–100%. Used on herd basis with some modification, the CF test should be useful in monitoring state and nationally accredited SPF swine herds.  相似文献   

Studies on the resistance of pigs to infestation with Hyostrongylus rubidus (Hassall & Stiles, 1892). I. Infection experiments in non-sensitised and previously sensitised growing animals     

J B Castelino  I V Herbert  I J Lean 《Research in veterinary science》1971,12(1):7-14

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A survey of the prevalence of Hyostrongylus rubidus in breeding pigs slaughtered in North Wales     

J B Castelino  M Thomas  I V Herbert  I H Lean 《The Veterinary record》1970,87(9):256-257

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The effects of DDT upon flat and vesicular bilayers studied by a fluorescent probe     

R.D. O&#x;Brien  T.J. Herbert  B.D. Hilton 《Pesticide biochemistry and physiology》1977,7(5):416-425

The effect of DDT and several analogs upon bilayer membranes was studied, using the fluorescent dye di (octadecyl)oxycarbocyanin as a probe. It was shown in flat bilayers of Torpedo electroplax phospholipids, using fluorescence correlation spectroscopy, that neither DDT nor its physiologically inactive analog, p,p′-hydroxy-DDT, affected the fluidity of the membrane. However DDT, and not the analog, displaced half of the dye from the membrane. In studies with lecithin or Torpedo electroplax phospholipid vesicles, using simple fluorescence measurements, no displacement of the dye was observed by DDT or its analogs.  相似文献   

Questions associated with proposed changes to the criminal code          下载免费PDF全文

Herbert RG 《The Canadian veterinary journal. La revue veterinaire canadienne》2001,42(7):531-535

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Studies of Partial Amino Acid Sequences of γ‐40k Secalins of Rye     

Claudia Gellrich  Peter Schieberle  Herbert Wieser 《Cereal Chemistry》2005,82(5):541-545

Though γ‐40k secalins are a major protein type within rye storage proteins, total amino acid sequences are not as well known as the gluten proteins of wheat. Well‐reputed structural features such as amino acid compositions and molecular masses indicated a close relationship between γ‐40k secalins and γ‐gliadins of wheat, but the degree of homology of amino acid sequences and the positions of intramolecular disulfide bonds are unknown. Therefore, two major components of γ‐40k secalins (R1, R2) were analyzed for partial amino acid sequences. The R1 and R2, derivatized with 4‐vinylpyridine, were isolated from the prolamin fraction of rye cultivar Danko by means of a two‐step RP‐HPLC on C₁₈ silica gel. The proteins were digested in parallel with trypsin and thermolysin, and the partial hydrolyzates were separated by RP‐HPLC. Simultaneous measurement of UV absorbance at 210 and 254 nm allowed the detection of all peptides eluted as well as the specific detection of pyridylethylated cysteine peptides. Isolated peptides were characterized by sequence analysis, and in parts by mass spectrometry, and assigned to known sequences of γ‐gliadins. The results demonstrated that the N‐terminal domain of R1 and R2 remained undigested after tryptic hydrolysis; they were in agreement with the N‐terminal domain of γ‐gliadins in their molecular masses and in the absence of cysteine residues. Most of the isolated peptides originated from the C‐terminal domains, they covered 83% (R1) and 77% (R2), respectively, of the C‐terminal domain of a known γ‐gliadin (clone pW1020). Comparison of R1 and R2 revealed differences only in a few sequence positions. The degree of homology between the C‐terminal domains present in γ‐40k secalins and γ‐gliadins was ≈85%. All eight cysteine residues of γ‐gliadins were found in R1 and R2 sequences. Remarkably, sequences close to corresponding cysteine residues were identical for γ‐40k secalins and γ‐gliadins. Therefore, it can be assumed that the positions of intramolecular disulfide links are homologous.  相似文献   

萝卜-甘蓝型油菜中萝卜基因组的RAPD与dpRAPD分析效率研究   总被引：3，自引：0，他引：3  

丁云花  Holger Budahn  简元才  Herhert Peterka 《华北农学报》2004,19(2):20-23

应用RAPD与dpRAPD方法鉴定萝卜-甘蓝型油莱中萝卜基因组,筛选了140条随机引物。结果表明,平均每条引物(组合)能产生的萝b基因组特异标记数dpRAPD高于RAPD,分别为1．69和1．33;在dpRAPD扩增产物中有77．6％谱带清晰易辨,略高于RAPD(75．4％)。两者所检测到的萝卜基因组标记大部分为各自特异的扩增产物。由于结合了荧光标记引物,dpRAPD反应产物可在Genetic Analyzer上分离检测,因此能检测到100bp以下的小片段DNA。  相似文献   

Prevalence of Mycobacterium bovis skin positivity and associated risk factors in cattle from Western Uganda     

Herbert Brian Kazoora  Samuel Majalija  Noah Kiwanuka  John Baligwamunsi Kaneene 《Tropical animal health and production》2014,46(8):1383-1390

Purpose

A cross-sectional study was undertaken to determine the prevalence of Mycobacterium bovis skin positivity and associated risk factors in cattle in western Uganda.

Methods

Herds were selected using multi-stage cluster sampling. The comparative cervical intradermal tuberculin test (CCT) was used to determine cattle tuberculosis status using US Department of Agriculture protocols. Risk factor data were collected from cattle owners through questionnaires collected by in-person interviews. Multivariable logistic regression models were used to measure the association between risk factors and herd CCT reactor prevalence.

Results

A total of 525 cattle from 63 herds were screened for M. bovis infection. Of the 525 cattle tested, 2.1 % were CCT reactors and 15.43 % were CCT suspects. Of herds tested, 14.28 % had at least 1 CCT reactor. Using a private water source for cattle and not introducing new cattle into the farm were associated with lower prevalence of M. bovis skin positivity. The herd-level prevalence of M. bovis reactors in Kashaari County of Mbarara District was 14.5 %, and the individual cattle prevalence was low (2.1 %).

Conclusions

Using communal sources of drinking water for cattle and introducing new cattle on the farm were farm management practices associated with increased risk of M. bovis exposure in cattle. Despite the low prevalence of bovine tuberculosis (TB), there is a need to educate the populace on the possibility of human infection with zoonotic TB and for educating farmers on practices to reduce the risk of acquiring M. bovis in the Mbarara District.  相似文献   

Insula damage and quitting smoking     

Vorel SR  Bisaga A  McKhann G  Kleber HD 《Science (New York, N.Y.)》2007,317(5836):318-9; author reply 318-9

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