沙对高尔夫果岭坪床物理特性的影响   总被引：6，自引：0，他引：6  

张巨明  S.W.BAKER 《草业学报》2007,16(2):99-104

对28种沙与泥炭按75∶25混配而成的高尔夫果岭坪床材料的物理特性进行了评价。不同类型沙的粒径、均一性和形状有所不同。高尔夫果岭坪床的物理特性主要取决于所使用的沙的特性。对沙 泥炭混配的坪床来说,其导水率在95~827 mm/h范围内变化,总孔隙度变化范围为38.8%~47.2%,而通气孔隙度(在-3 kPa水势下)为0.9%~24.6%,毛管孔隙度(在-3 kPa水势下)为17.7%~42.1%。结果表明,排水速率和通气孔隙度与毛管孔隙度的平衡主要受沙的粒径大小的影响,起决定作用的是粒径最大和最小的沙所占的比例,而容重、总孔隙度和抗剪切强度取决于沙的均一性。当沙粒较圆且较为光滑时,坪床材料孔隙度趋向减少。沙表面越粗糙,坪床抗剪切能力就越强,而沙对坪床硬度的作用不显著。  相似文献   

Implementation of two high through-put techniques in a novel application: detecting point mutations in large EMS mutated plant populations     

Antoine LF Gady  Freddy WK Hermans  Marion HBJ Van de Wal  Eibertus N van Loo  Richard GF Visser  Christian WB Bachem 《Plant methods》2009,5(1):13-14

Background  

The establishment of mutant populations together with the strategies for targeted mutation detection has been applied successfully to a large number of organisms including many species in the plant kingdom. Considerable efforts have been invested into research on tomato as a model for berry-fruit plants. With the progress of the tomato sequencing project, reverse genetics becomes an obvious and achievable goal.  相似文献   

Diaphragmatic hernia. Analysis of fifty-six cases in dogs and cats   总被引：1，自引：0，他引：1  

HELEN L. GARSON  N. H. DODMAN  G. J. BAKER 《The Journal of small animal practice》1980,21(9):469-481

A review of fifty-six cases of diaphragmatic hernia in the dog and cat is presented. These were admitted to the University of Glasgow Veterinary School between January 1972 and August 1978. Fifty-three of these cases were treated surgically but only twenty-nine survived to be discharged from the hospital. The reasons for the low survival rate are discussed in detail.  相似文献   

CALCIUM: UNUSUAL SOURCES IN THE HIGHLAND PERUVIAN DIET     

BAKER BT  MAZESS RB 《Science (New York, N.Y.)》1963,142(3598):1466-1467

A dietary survey conducted in the southern highlands of Peru revealed two important sources of dietary calcium not previously reported. Mineral and ash calcium ingested as a food spice, and along with coca, raises the calcium intake from the low figures recorded by standard nutritional surveys to a more substantial level.  相似文献   

Hypersensitivity of dog skin to fleas-a clinical report     

K. P. BAKER  J. O'FLANAGAN 《The Journal of small animal practice》1975,16(1-12):317-327

The results of an examination of the clinical signs, epidemiology and histopathology of dogs presented with flea bite dermatitis at two Dublin clinics are given. Whilst the majority of Dublin dogs are infested with fleas only some develop a reaction to flea saliva.
It is concluded that on the evidence available, flea dermatitis is a hypersensitive reaction to flea saliva and elimination of fleas from the environment of affected animals remains the best method of controlling the disease.  相似文献   

EVALUATION OF MAGNETIC RESONANCE SAFETY OF VETERINARY RADIOFREQUENCY IDENTIFICATION DEVICES AT 1 T     

MARTIN A. BAKER  IAIN MACDONALD 《Veterinary radiology & ultrasound》2011,52(2):161-167

Implants containing metallic components have the potential to become heated or move within the patient while in the magnetic resonance (MR) environment. Despite containing a ferromagnetic core and having been in use for over 20 years, no information is available on the safety of veterinary radiofrequency identification devices during MR examinations. These devices are the most commonly encountered metallic implants in dogs and cats undergoing MR imaging. Three commercial veterinary microchips were evaluated for safety in the MR environment at 1 T. Parameters tested were translational force, torque, heating, artifact production, and function. Translation and torque were larger than that expected from normal activity under normal gravity. No significant heating was observed. Signal void artifacts may affect diagnosis if they are too close to the area of clinical importance. Microchip function was unaffected by routine clinical MR imaging. Capsule formation around devices is a major factor in counteracting translation and torque. Our findings support that is acceptable for patients to undergo MR imaging with this 1 T system following an interval of 3 months postimplantation to allow capsule growth. Because of the complex interactions involved, these observations may not be translatable to MR scanners of different field strength and/or manufacturer. Further safety testing of these and other radiofrequency identification devices is therefore recommended at different field strengths and equipment specifications.  相似文献   

Complications of Celiotomy Incisions in Horses     

DAVID A. WILSON DVM  MS  Diplomate ACVS    GORDON J. BAKER BVSc  PhD  MRCVS  Diplomate ACVS  MICHAEL J. BOERO DVM  MS  Diplomate ACVS 《Veterinary surgery : VS》1995,24(6):506-514

Complications of celiotomy incisions were evaluated retrospectively in 274 horses that survived at least 1 month after surgery, or died or were euthanatized within 1 month of surgery, as a direct result of these complications. Horses were divided into four groups; group A, a ventral median celiotomy for intestinal disease; group B, ventral median celiotomy for nonintestinal disease; group C, repair of an umbilical hernia; and group D, celiotomy in a region other than the midline. Specific incisional complications were peri-incisional edema, drainage, incisional abscess, suture sinus, and dehiscence. Incision-related complications occurred in 30% of the horses (group A, 40%; group B 18%; group C, 7%; and group D, 88%). Complications occurred more frequently in group D than group A ( P =.009), which were higher than in groups B and C ( P <.00001). Incisional hernia occurred in 28 of 256 (11%) horses that survived at least 4 months and were available for follow-up. Hernia formation was more common ( P <.00001) in horses that had other incisional complications (23 horses) than those without (5 horses). Serous or purulent incisional drainage, were more likely to be associated with hernia formation than was serosanguineous drainage or other incisional complications.  相似文献   

Interpretation of resistance to Fusarium wilt in tomato     

SNYDER WC  BAKER KF  HANSEN HN 《Science (New York, N.Y.)》1946,103(2685):707-708

  相似文献   

Adequate poultry and meat inspection     

BAKER SW 《Journal of the American Veterinary Medical Association》1958,133(1):64-66

  相似文献   

A survey of swine brucellosis and leptospirosis in Wisconsin     

BAKER ED  PIRAINO F  RUEDY D 《Journal of the American Veterinary Medical Association》1959,134(10):440-442

  相似文献