Book reviews     

H. Schulz 《Wood Science and Technology》1989,23(4):370-370

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Stemming the tide     

W. Liese  H. Schulz  T. E. Timell 《Wood Science and Technology》1984,18(4):241-241

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Book review     

H. Schulz 《Wood Science and Technology》1993,27(4):294-280

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Stiffening phenomena in annual rings of coniferous wood     

H. Schulz 《Wood Science and Technology》1984,18(1):19-32

Summary The structure of coniferous wood is characterized by pronounced differences in density between earlywood and latewood. This could result in disadvantages in wood strength especially against bending. A summary of the observations in this paper leads to the following hypothesis: Coniferous trees meet this danger by forming numerous stiffenings especially in broad annual rings with a high percentage of earlywood. Such stiffenings may be produced by more or less slight fluctuations of density or chemistry within annual rings in radial as well as in tangential directions. The question remains open which anatomical or chemical reasons, upon sandblasting, locally cause radial or radially branched ribs and craters in cross sections, waviness in radial sections and cloudy structures in tangential sections.Paper presented to the IUFRO-Division 5. Conference in Madison, Wisc. 1983.  相似文献   

A lineage of myeloid cells independent of Myb and hematopoietic stem cells   总被引：1，自引：0，他引：1  

Schulz C  Gomez Perdiguero E  Chorro L  Szabo-Rogers H  Cagnard N  Kierdorf K  Prinz M  Wu B  Jacobsen SE  Pollard JW  Frampton J  Liu KJ  Geissmann F 《Science (New York, N.Y.)》2012,336(6077):86-90

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Experimental infection of South American camelids with bluetongue virus serotype 8     

Schulz C  Eschbaumer M  Rudolf M  König P  Keller M  Bauer C  Gauly M  Grevelding CG  Beer M  Hoffmann B 《Veterinary microbiology》2012,154(3-4):257-265

Bluetongue (BT) is an infectious, non-contagious disease of wild and domestic ruminants. It is caused by bluetongue virus (BTV) and transmitted by Culicoides biting midges. Since 1998, BT has been emerging throughout Europe, threatening not only the na?ve ruminant population. Historically, South American camelids (SAC) were considered to be resistant to BT disease. However, recent fatalities related to BTV in captive SAC have raised questions about their role in BTV epidemiology. Data on the susceptibility of SAC to experimental infection with BTV serotype 8 (BTV-8) were collected in an animal experiment. Three alpacas (Vicugna pacos) and three llamas (Lama glama) were experimentally infected with BTV-8. They displayed very mild clinical signs. Seroconversion was first measured 6-8 days after infection (dpi) by ELISA, and neutralising antibodies appeared 10-13 dpi. BTV-8 RNA levels in blood were very low, and quickly cleared after seroconversion. However, spleens collected post-mortem were still positive for BTV RNA, over 71 days after the last detection in blood samples. Virus isolation was only possible from blood samples of two alpacas by inoculation of highly sensitive interferon alpha/beta receptor-deficient (IFNAR(-/-)) mice. An in vitro experiment demonstrated that significantly lower amounts of BTV-8 adsorb to SAC blood cells than to bovine blood cells. Although this experiment showed that SAC are generally susceptible to a BTV-8 infection, it indicates that these species play a negligible role in BTV epidemiology.  相似文献   

Erratum to “A proposal of clinical breakpoints for amoxicillin applicable to porcine respiratory tract pathogens” [Vet. Microbiol. 126 (2008) 178–188]     

Stefan Schwarz  Alexander Böttner  Luc Goossens  H. Mohamed Hafez  Katrin Hartmann  Martin Kaske  Corinna Kehrenberg  Manfred Kietzmann  Dieter Klarmann  Günter Klein  Peter Krabisch  Gabriele Luhofer  Angelika Richter  Bianka Schulz  Claudia Sigge  Karl-Heinz Waldmann  Jürgen Wallmann  Christiane Werckenthin 《Veterinary microbiology》2009

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Effect of surgical technique and use of a rigid centralizing device on stem positioning and geometric reconstruction in the sagittal plane during total hip replacement in canine cadavers     

Schulz KS  Stover SM  Kass PH  Vasseur PB  Koehler C 《American journal of veterinary research》1999,60(9):1126-1135

OBJECTIVE: To determine the effect of surgical technique and use of a rigid centralizing device on stem positioning and geometric reconstruction in the sagittal plane during total hip replacement in dogs. SAMPLE POPULATION: Bilateral femurs from 8 adult mixed-breed canine cadavers. PROCEDURE: Femurs were prepared for femoral stem implantation, using 4 variations in technique. Proximal femoral reconstruction and femoral stem positioning were evaluated on radiographs. RESULTS: Implants evaluated in this study accurately reconstructed displacement of the femoral head of the intact canine femur in the sagittal plane. Centralization of the distal aspect of the stem was optimized by use of an undersized femoral stem. Ostectomy at the level of the lesser trochanter resulted in the smallest diaphysis-to-implant angle. Anteversion and retroversion of implants significantly decreased the distance between the distal tip of the implant and the adjacent cortex, compared with normoversion. The centralizing device significantly increased the minimum distance between the distal tip of the implant and adjacent cortex but did not improve the odds of actually centralizing the tip of the implant. CONCLUSIONS AND CLINICAL RELEVANCE: Malpositioning of implants in the sagittal plane may be minimized through ostectomy at the lesser trochanter and use of an undersized implant positioned in normoversion. Use of a polymethylmethacrylate centralizing device will help eliminate contact between the implant tip and adjacent cortex. Implantation of an undersized femoral component, avoidance of substantial anteversion or retroversion, and use of a rigid centralizing device are recommended when using the prosthesis described-for total hip replacement of dogs.  相似文献   

Rapid measurement and evaluation of the effect of drying conditions on harpagoside content in Harpagophytum procumbens (devil's claw) root     

Joubert E  Manley M  Gray BR  Schulz H 《Journal of agricultural and food chemistry》2005,53(9):3493-3502

The effect of drying conditions on harpagoside (HS) retention, as well as the use of near-infrared spectroscopy (NIRS) for rapid quantification of the iridoids, HS, and 8-rho-coumaroyl harpagide (8rhoCHG) and moisture, in dried Harpagophytum procumbens (devil's claw) root was investigated. HS retention was significantly (P < 0.05) lower in sun-dried samples as compared to tunnel-dried (60 degrees C, 30% relative humidity) and freeze-dried samples. The best retention of HS was obtained at 50 degrees C when evaluating tunnel drying at dry bulb temperatures of 40, 50, and 60 degrees C and 30% relative humidity. NIRS can effectively predict moisture content with a standard error of prediction (SEP) and correlation coefficient (r) of 0.24% and 0.99, respectively. The HS and 8rhoCHG NIRS calibration models established for both iridoid glucosides can be used for screening purposes to get a semiquantitative classification of devil's claw roots (for HS: SEP = 0.236%, r = 0.64; for 8rhoCHG: SEP = 0.048%, r = 0.73).  相似文献   

In vitro force mapping of normal canine humeroradial and humeroulnar joints     

Mason DR  Schulz KS  Fujita Y  Kass PH  Stover SM 《American journal of veterinary research》2005,66(1):132-135

OBJECTIVE: To determine the distribution of force between the articular surfaces of the humerus and radius and between the humerus and ulna in normal canine forelimbs. SAMPLE POPULATION: 12 cadaveric canine right forelimbs. PROCEDURE: Transarticular force maps were created by placing a tactile array pressure sensor into the elbow joint cavity and loading cadaveric forelimbs in a materials testing system. Mean joint forces were determined at loads of 50, 100, 150, and 200 N. RESULTS: All tests produced 2 distinct areas of high load that corresponded with the proximal articular surfaces of the radius and ulna. Mean forces for the radial proximal articular surface were slightly but significantly greater than for the ulna, averaging 51% to 52% of total force for all applied loads. CONCLUSIONS AND CLINICAL RELEVANCE: The proximal articular surface of the ulna contributes substantially to load transfer through the canine elbow joint. Abnormalities, which increase this load, might contribute to canine elbow joint dysplasia, specifically fragmentation of the medial coronoid process and osteochondritis dissecans of the medial aspect of the humeral condyle. In the treatment of these conditions, the normal force distribution within the canine elbow joint should be taken into consideration.  相似文献