Biology(2.Pest)
8 X, q+ @8 B3 g Word comes from California of a new weapon武器, 兵器 in the war on household pests.Two scientists working for a firm in Anaheim, California, have developed a method to eliminate排除,剔除 insects without using dangerous chemicals. The new poison? Hot air.9 P+ e+ Y) y2 v8 F+ N
6 R/ Q+ Y( O5 X/ D" _ The basic idea is that insects虫, 昆虫 cannot adjust to temperatures much above normal. In labratory experiments实验, cockroaches蟑螂 and termites白蚁 can`t survive much more than a quarter of an hour at 125 degrees Fahrenheit , or about 50 degrees centigrade.5 H$ }' b4 n2 R( X7 t9 p0 {& y+ `
8 A% F$ ?6 s9 T% {, t: H6 V The new method 方法;办法involves 使卷入; 使陷入; 拖累covering a house with huge tent and filling it with air heated around 65 degrees centigrade. Hot air is forced使劲推、拉、挤 in with fans, and the tent keeps the heat inside he house. Since termites try to escape by hiding in wooden beams, the heat treatment 处理, 处置, 加工must be continued for a full 6 hours. But when it`s all over, and the insects are dead, there are no toxic residues残留物to endanger危及,危害 humans or pets, and no funny古怪的;有趣的 smells.6 |6 X: P ~, c- n) `
3 C# K& G# a t* t2 H7 D) x7 uScientists claim that there is no danger of fire, either, since very few household materials will burn at 65 degrees centigrade. In fact, wood is prepared for construction use by drying it in ovens烤箱 at 80 degree centigrade, which is substantially相当多地,大大地 hotter than the air used in this procedure过程;步骤;常规;应用程式.