OBJECTIVE The present study aims to find a convenient, rapid, and stable method to establish bladder tumor in mice. METHODS Female Balb/C-nu-nu nude mice (or female T739 mice) were narcotized by sodium pentobarbital at a dosage of 60 mg/kg. The stylet of the 24# venous retention needles was bent in a 5° to 7° angle at a distance of 15 mm from the needlepoint to form a circle with 2.61 mm to 3...

The varied technologies for trajectory control used in todays automatic vehicle navigation and positioning systems reveal several disadvantages. Low frequency (LF) transponders are used as lane in-ground marks for Autonomous Guided Vehicles (AGV). Those in-ground transponders operate with inductive coupling. Measured transponder positions are compared with map based data which contain reference...

Due to construction costs and operational issues have been in this study discuss how strengthen the concrete columns. The results of previous studies on some structures earthquake-prone weakness reinforced inside steel casings surrounding columns is a modern technique used many countries today for rectangular circular concrete. advantages method convenient, economical easy. Reference model colu...

The classical methods for determining the calorie value of foodstuffs are both long and tedious, and a number of alternative methods have been suggested for assessing the energy value of foods based on an analysis of the foodstuff and the use of factors with each of the chemical components to give energy content. None of these methods is really satisfactory, and when a high level of accuracy is...

The grooved casing has been widely used to control the size of fragment. In order study dynamic behaviour and fragmentation novel structure with different explosive loads, we established a numerical model in which two kinds grooves depths are alternated on casing, diameter charges form loading. Through orthogonal test, rules influenced by factors also obtained. shows that can be ruptured charac...

In the process of field exploration, along with regular flooding, a significant part wells is flooded prematurely due to leakage string and outer annulus. an effort intensify flow oil bottom in conditions, specialists often try solve this problem by using various technologies that change reservoir characteristics formation. Any increase pressure exceeds strength rocks compression or tension lea...