控制运输过程中的沙门氏菌污染

最近，欧洲议会宣布提供912万欧元的资金用于2007年控制家禽中的沙门氏菌。这笔资金专门供欧盟18个成员国使用。拨款规模如此之大可见抗击家禽生产和加工链中沙门氏菌的艰巨性，同时不可避免地令人重新质疑饲料厂的努力程度。法国饲料卫生专家Jean—Michel Nebout建议从另一角度了解工厂里运输过程中的沙门氏菌控制情况。     

世界饲料产业2007年回顾及其展望

根据《国际饲料》权威饲料数据库统计显示，2007年全球饲料生产商和综合性饲料加工厂都表现了良好的应变能力。2007年，饲料生产商遭遇了原料价格上涨和禽流感等疫病的困扰，但是所有的产业资料都显示了2007年的总产量增长超过3．5％。     

Calcium ion release in mechanically disrupted heart cells

In cardiac muscle fibers which have had their sarcolemma disrupted intracellular stores of calcium ions can be released by the same chemical stimuli which cause their release from the sarcoplasmic reticulum of skinned skeletal muscle fibers. These stimuli are increases in calcium or caffeine concentrations and substitution of chloride for propionate or sodium for potassium in solutions bathing the fibers.     

回顾母猪氨基酸营养正当时

国际上,动物营养学界正在对母猪饲粮中氨基酸营养研究进行回顾。虽然也正在推出保育期及肥育后期猪的氨基酸需要量或供给量建议,但无疑与怀孕母猪氨基酸营养有关的综述最为重要。各地的饲料配方师面临的形势是：当代母猪显然要比仅仅几年前的母猪产仔数更多,泌乳量也更多。这必然意味着它们的氨基酸需要量也明显不同。不过,用于估测氨基酸需要量的方法仍有待改进。     

Effects of polyethylene bags,ethylene absorbent and 1-methylcyclopropene on the storage of Japanese pears

Summary

Storage of the ‘Nijisseiki’ cultivar of Japanese pears was studied over three seasons for periods up to 36 weeks at 0°C. Storage in 50 μm thick low-density polyethylene (LDPE) bags at 0°C considerably delayed yellowing in all experiments, even after fruit was removed to 20°C for 1 week at the end of storage. The addition of an ethylene absorbent made from potassium permanganate on aluminium oxide (Purafil II) further delayed yellowing. Carbon dioxide levels in both treatments varied, but were generally in the range 2–3%. Oxygen levels remained high, generally 16–19%. In bags without Purafil, ethylene levels rose slightly during storage and were generally about 0.15 μl l^–1. When Purafil was included in the bags, the ethylene level was reduced 10-fold or more. A sensory test indicated that the use of LDPE bags and ethylene absorbent resulted in fruit with better eating quality than fruit stored in air. Disorders over the 3-year investigation were low even after long-term storage. The use of polyethylene bags reduced the severity of flesh browning, and flesh spot decay was virtually absent. The use of bags increased the severity of core browning. Inclusion of an ethylene absorbent in bags reduced the severity of disorders, particularly core browning. Treatment of the fruit with 1-methylcyclopropene (1-MCP), before or during storage, resulted in higher ethylene levels in the polyethylene bags. At the concentrations used, 1-MCP did not improve the storage of ‘Nijisseiki’ compared to the use of polyethylene bags with Purafil II.     

The reaction of imported British Shire horses to African Horse Sickness: A case report

Summary

Twelve (12) heavy horses of the Shire breed imported into Nigeria in 1974 died within two months after importation. This was because of inclement weather and non‐availability of AHS vaccine.