肠道病毒71型（enterovirus 71，Ev71）是引起手足口病（hand，foot and mouth disease，HFMD）的主要病原体之一，HFMD可并发严重神经系统疾病，甚至导致死亡。事实上，EV71一直被视为继脊髓灰质炎病毒消灭后最重要的嗜神经病毒。此文就EV71感染的易感因素以及疫苗的研究进展进行综述，从而为EV71感染的防控指明方向。
The production of CuCr alloys utilizing explosive compaction was studied. Mixture powders of CuCr alloys placed in tubes with a dimension of d14.0 mm×21.4 mm can be compacted using explosive pads of 16.5 mm or 22.5 mm. Thicker pads of explosive make the compacts more porous. The effects of the ratio of m e/m p, ratio of m e/(m p+m t) and impact energy on the density of compacts were similar, they were chosen to control explosive compaction, respectively. When adequate value of the parameters m e/m p, m e/(m t+m p) and impact energy of unit area of tube was chosen, high density(7.858 g/cm 3), high hardness(HB189) and low conductance (13.6 MS/m) of CuCr alloys could be made by explosive compaction. The general properties of CuCr alloys by explosive compaction are similar to those of CuCr alloys by traditional process.
L ethal temperature tolerance was determined for about 8 cm, age 0 Pseudosciaena crocea using both slow heating and rapid transfer protocol. The acclimatization temperature was 28 ℃ with summer season, lethal temperature ( LT50 value ) of slow heating protocol ( CTMax ) was 35.0 ℃, and the upper and lower incipient lethal temperatures of rapid transfer protocol were 34.2 ℃ and 17.5 ℃ respectively.
