土壤镍在不同籼稻品种中的富集

以福建省部分地市采集的163个籼稻样品及对应的土壤样品为材料,研究了不同籼稻品种对土壤镍的富集能力,以期为镍污染土壤上籼稻品种的合理布局提供依据。结果表明,供试土壤全镍含量介于3.52～72.38 mg/kg,平均含量为17.86 mg/kg。供试土壤有效镍含量介于0.01～1.32 mg/kg,平均含量为0.30 mg/kg。供试糙米镍含量为0.04～1.82 mg/kg。镍在土壤和各品种糙米之间的转移系数均随土壤有效镍的升高呈幂函数降低。采用回归估算法、在土壤有效镍为0.1 mg/kg的点上估算了各水稻品种镍的代表性的转移系数（TF0.1,有效量基）。不同品种的TF0.1依次为：岳优9113＞佳优948＞深两优5814＞培杂泰丰＞天优998＞宜香2292＞宜优115＞纳科1号＞泉珍10号＞Ⅱ优673＞丰Ⅱ优1号＞扬两优6号＞宜优99＞Ⅱ优3301＞特优627＞内2优6号。不同籼稻品种对土壤镍富集能力的差别主要为品种之间的差别,与常规稻或杂交稻、两系杂交或三系杂交无必然联系。     

Intrahepatic Portosystemic Venous Anomaly in the Dog Perioperative Management and Complications

Hypotension, hemorrhage, and acute hepatic congestion were common complications during surgical correction of intrahepatic portosystemic venous anomalies in 13 dogs. Acute splanchnic congestion and hyperthermia were the most serious postoperative complications. Three dogs died within 24 hours; 10 dogs are alive and well after 12 to 46 months.     

Walleye pollock recruitment in Shelikof Strait: applied fisheries oceanography

Fisheries-Oceanography Coordinated Investigations (FOCI) is a National Oceanic and Atmospheric Administration (NOAA) research programme seeking to understand recruitment processes of commercially exploited Alaskan fishes. The FOCI is mainly comprised of scientists at the Pacific Marine Environmental Laboratory and the Alaska Fisheries Science Center who study both the biotic and abiotic environment, including processes within larval patches through integrated field, laboratory, and modelling studies. The initial focus of studies was walleye pollock ( Theragra chakogramma ) spawning in Shelikof Strait, Gulf of Alaska. The choice of this population for our research was based on development of a large fishery and the substantial variation in recruitment that was observed in the late 1970s and early 1980s. Also, the early life history of this population is quite predictable and restricted both temporally and spatially. Walleye pollock spawn consistently in a small part of Shelikof Strait in early spring from which a large patch of eggs and later larvae is produced. In most years this concentration of larvae drifts to the south-west through the strait during April and May. Large numbers of larvae are often found in eddies which frequent the area and we have observed improved feeding conditions for larvae, in as opposed to out of eddies. We have found that first-feeding larvae have higher survival rates during calm periods, rather than in storms, and that in many years recruitment is largely set by the end of the larval period, although in some years age-0 juvenile mortality is also important. FOCI now generates information that is being used for management of this resource.     

Laparoscopic Adhesiolysis in a Horse

Objective —The purpose of this report was to describe the use of laparoscopy as a method of treatment for abdominal adhesions in the horse.
Clinical Report —Unilateral ovariectomy for removal of a granulosa cell tumor was performed through a diagonal paramedian approach in a 14-year-old Arabian mare. Progressive incisional swelling and hemorrhage culminated in acute incisional dehiscence with herniation of ileum on the sixth postoperative day. Septic peritonitis that responded to parenteral antibiotic therapy was identified 7 days after hernia repair. Seven days later, the mare had signs of abdominal pain, and adhesions of small intestine to the paramedian incision were identified on rectal palpation. Transrectally assisted laparoscopic adhesiolysis was performed. No further complications occurred.
Clinical Relevance —Laparoscopic adhesiolysis may provide better observation of adhesions and reduced postoperative morbidity compared with laparotomy.     

Surgical Treatment of Pheochromocytoma: Technique, Complications, and Results in Six Dogs

Six dogs were diagnosed with phcochromocyloma and staged according to the World Health Organization's system for tumor classification. Two dogs had benign tumors (Tl, NO, M0) and four dogs had malignant tumors (T2, NO. M 1 or T3, N0, M0). All dogs had adrenalectomy, two dogs had concurrent nephrectomy, and three dogs had concurrent resection of a tumor thrombus from the vena cava. Anesthetic complications occurred in five dogs, including wide variations in heart rate (four dogs), blood pressure (five dogs), and cardiac arrythmias (one dog). One dog died 12 hours after surgery from partial dehiscence of the suture line and hemorrhage from the vena cava, and one dog died 6 days after surgery during general anesthesia for treatment of laryngeal paralysis. Four dogs survived from 3 to 23 months (median, 15 months). One dog remained hypertensive after surgery. Benign and malignant pheochromocytomas seem to be amenable to surgical resection. © Copyright 1994 by The American College of Veterinary Surgeons     

Pulsed Carbon Dioxide Laser for Cartilage Vaporization and Subchondral Bone Perforation in Horses Part I: Technique and Clinical Results

A carbon dioxide laser, used in a rapidly pulsed mode, was evaluated for intra-articular use in horses. Under arthroscopic guidance, a lensed 5 mm laser probe attached directly to a hand-held carbon dioxide laser was inserted into one intercarpal joint of eight horses. In four horses, a cartilage crater 1 cm in diameter was created to the level of the subchondral bone of the articular surface of the third carpal bone. In four horses, the laser was directed perpendicular to the articular surface of the third carpal bone and activated to penetrate the cartilage and subchondral bone. The intercarpal joint of the opposite carpus in each horse was subjected to arthroscopic examination and insertion of the laser probe for an equivalent time. The laser was not activated and these joints served as sham operated controls. The horses were evaluated clinically for 8 weeks, then euthanatized, and the joints were examined radiographically, grossly, and histologically. Pulsed carbon dioxide laser vaporized cartilage readily but penetrated bone poorly. Cartilage vaporization resulted in no greater swelling, heat, pain on flexion, lameness, or synovial fluid reaction than the sham procedure. Laser drilling resulted in a shallow, charred hole with a tenacious carbon residue, and in combination with the thermal damage to deeper bone, resulted in increased swelling, mild lameness and a low-grade, but persistent synovitis. The carbon dioxide laser is a useful intra-articular instrument for removal of cartilage and has potential application in inaccessible regions of diarthrodial joints. It does not penetrate bone sufficiently to have application in subchondral drilling.     

Quantifying the effects of individual and environmental variability in fish recruitment

The effect of environmental variability on fish recruitment is analysed using simple linear growth models. It is shown that variance in an individual's environment significantly increases the probability of recruitment. It is also argued that environmental variance should lead to differences in growth rates observed in recruited fish, and in the mean observed growth rate of the overall population. These conclusions are discussed with reference to recent observations from field studies.     

A system for rapid freezing of pasture samples in the field

A system for rapid freezing and containment of pasture and forage samples in the field is described. Core temperatures of pasture samples of 2–5 kg mass can be reduced to below 0°C in a few minutes using liquified carbon dioxide in the ratio of 1 to 2 kg carbon dioxide to 1 kg of green plant material. Changes in the pH of the plant extract were very small ( ca. 0 1 pH unit). The system is especially suitable for use in areas remote from normal laboratory facilities, where rapid freezing of herbage samples is essential.