冲击片雷管

一种冲击片雷管包括一个开口垂直倒置的药盂，药盂的口与水平放置的爆箔起爆器的上表面相毗邻，一完整的法兰，水平地铺在药盂口的外周围；一片盖板，板上有一个定位孔，通过孔与ＥＦＩ的上表现接触，通过这个孔，药盂垂直伸展；一个镗孔咬合住法兰，使口部对着上表面，这样，施加给药盂的侧向力将传递给盖板。     

黄药和巯基苯并噻唑作捕收剂对金和毒砂浮选效率的比较

用巯基苯并噻唑(NaBMT)作捕收剂对来自赛尔西尼(Salsigne)矿床的两种难选含金矿石试样进行了浮选试验.结果表明,用KAX(钾黄药)(25%)和NaMBT(75%)的混合药剂取代常规的混合捕收剂,即使其用量较小,仍可使毒砂、尤其是金的浮选得到明显的改善.浮选选择性相回收率的改善,必须是在有关作业协同的有效作用下进行,这些作业为,强力浮选把毒砂和金回收到粗精矿中,再对粗精矿进行有效的精选和单体石英的弱浮选.     

EFP多点起爆研究

本研究由ＭＯＤ支持，评估了有几个起爆点的爆炸成形弹丸，固定的参数为１１２ｍｍ弹径，铁质药型罩和炸药装药，这样做的结果是弹丸长度明显减小。通过一种数字和实验的方法研究了杵体弹的爆轰性能和空气动力学特性，观察爆轰波的相互作用，发现超压的作用保证了一个速度 ２１４０ｍ／ｓ和１２２ｍｍ长的杵体弹，而炸药高度只有３０ｍｍ。     

用于冲击片雷管的爆炸驱动开关的电性能

对计划用于冲击片雷管的快速高电流开关进行与时间有关的电阻测量。这种开关由铜－聚合物－铜叠层片构成，设计用于在受到爆炸驱动的铜飞片撞击后传导电。我们实验中使用的聚合物膜是Ｋａｐｔｏｎ（聚苯均四甲酰亚胺），预计这种膜在９ＧＰａ和９ＧＰａ以上的压力下具有冲击感应传导性。当这种开关中获得９ＧＰａ左右的冲击压力时，没有发现有明显的冲击传导作用。通过观察Ｔｅｆｌｏｎ（聚四氟乙烯）膜开关同样的电性能进一步证实了     

Dynamic proteome in enigmatic preeclampsia: an account of molecular mechanisms and biomarker discovery

The coevolution of genomics and proteomics has led to advancements in the field of diagnosis and molecular mechanisms of disease. Proteomics is now stepping into the field of obstetrics, where early diagnosis of pregnancy complication such as preeclampsia (PE) is imperative. PE is a multifactorial disease characterized by hypertension with proteinuria, which is a leading cause of maternal and neonatal morbidity and mortality occurring in 5-7% of pregnancies worldwide. This review discusses the probable molecular mechanisms that lead to PE and summarizes the proteomics research carried out in understanding the pathogenicity of PE, and for identifying the candidate biomarker for diagnosis of the disease.     

Progress towards using the speed of ultrasound for beef leanness classification

Following the observation of a high correlation between the reciprocal of the speed of ultrasound and lean proportion in beef carcasses, commercial equipment (VOSI) was developed and its performance alongside a smaller assembly (Mini G) is reported. The speed of ultrasound was measured through six sites on beef carcasses within 1 h of stunning: three sites with VOSI and three sites with Mini G. Sides were also scored for fatness and conformation using the EAAP system, and subcutaneous fat depth was measured at 25,50 and 75% of the width of M. longissimus thoracis from the midline at the last rib. All sides were dissected into subcutaneous fat, intermuscular fat, muscle and bone. The reciprocal speed averaged over the three VOSI sites (RV346) was the best single predictor of the proportion of lean in the side. Multiple regression analyses, in predicting per cent lean, showed that addition of conformation score improved the precision of fat score and fat depth for a group of 26 sides. It did not provide a significant improvement over RV346. However, in another group of 50 sides showing more variation in side mass and conformation, conformation score did significantly improve RV346. The best prediction of per cent lean, involving RV346 and tissue thicknesses, gave a residual standard deviation of 1·35%, and conformation score did not significantly improve this regression.     

Estimation of lamb carcass composition from measurements of the speed of ultrasound in the soft tissues of live animals and carcasses

The application of the velocity of sound (VOS) technique to lamb carcasses in a previous study (Fisher & Page, 1986) measured composition at a hind limb and neck site but was not as precise as fat scores in predicting lean proportion. This study examines VOS measurements made at sites in the hind limbs and along the vertebral column in live sheep and carcasses. A group (A) comprising five breeds of males and females (n = 61) and a sub-group (B) of Scottish Blackface castrated males (n = 34) were studied, and the reciprocal velocity of ultrasound (RV) was measured on the live sheep immediately behind the shoulder and over the last rib using a fixed-distance transducer assembly operating at 5 MHz, and in the hind limbs at 2·25 MHz using the apparatus described by Miles et al. (1984). Corresponding measurements were made on the carcasses which were classified by a Meat and Livestock Commission fatstock officer and then dissected. Standard deviations of lean proportion were 4·48% (A) and 3·39% (B). The residual standard deviations (rsds) for groups A and B respectively were obtained using the following predictors: live mass (LM) 4·27% and 2·96%; LM + breed (B) 3·08% (group A only); LM + mean RV 2·36% and 2·07%; LM + B + mean RV 1·99% (group A only). Using carcass measurements: carcass mass (CM) 4·25% and 2·90%; CM + MLC fat score 2·99% and 2·12%; CM + RV last rib 2·89% and 2·02%. These data show that VOS measurements through dorsal sites of live sheep provide encouragingly precise estimates of carcass lean proportion. For carcasses, dorsal sites provide a less precise estimate of carcass lean but when carcass mass is included in multiple regression the precision of the correlation is comparable with that of multiple regression of fat score with carcass mass.