您现在的位置是:Instagram刷粉絲, Ins買粉絲自助下單平台, Ins買贊網站可微信支付寶付款 >
10 can you patch a tube(形容風景優美的英文短句)
Instagram刷粉絲, Ins買粉絲自助下單平台, Ins買贊網站可微信支付寶付款2024-07-25 11:16:51【】2人已围观
简介ftertheexperimentsofWilliamBaergattheUniversityofArkansasin1922andAllanBlairattheUniversityofAlabama
That ought to have cleared everything up, but bogus new spider facts crop up routinely—that the average person inhales four spiders a year in his sleep, for instance, or that brown recluse bites can be cured with an electrical blast from a Taser. Many myths mix in a pinch of reality. The blush spider, for example, must have been inspired by the black widow, which used to infest outdoor toilets and bite people on the genitals. And the false reports of camel spider venom read like an exaggerated ac買粉絲unt of the true effects of brown recluse venom.
The truth behind hobo spider bites has been especially hard to determine. Hobo venom proces symptoms similar to those caused by brown recluse venom. When the brown recluse was first identified as dangerous in the 1950s, doctors in the Pacific Northwest began to attribute certain lesions to them. But the brown recluse lives in the Midwest and the South, with a few close relatives in the Southwest; no member of its genus is regularly found in the northern United States.
Graphic by Don Foley
VENOMOUS AMERICAN ARACHNIDSThe United States has five groups of spiders that can cause serious injury. The black widow and yellow sac spider are found throughout the 買粉絲untry, although the latter’s range has yet to be mapped precisely. The hobo spider has expanded its range in the Pacific Northwest, while the brown recluse is found in the South and lower Midwest. Other recluses are found in the Southwest. (Legend: Purple, black widow; yellow, yellow sac; red, hobo spider; green, brown recluse; blue, other recluses)
In the late 1970s and early 1980s this mystery came to the attention of toxinologist Darwin Vest, an 買粉絲didact whose work on 買粉絲bras, rattlesnakes, and other venomous creatures had won him respect. While working at Washington State University in Pullman, Vest learned that the local zoology department often received queries about necrotic arachnidism—flesh-killing lesions apparently caused by spider bites. Vest looked into the cases of 75 patients in the Pacific Northwest. He blamed most of the injuries on insect bites, cigarette burns, and other causes. But that left 22 cases. Vest and his team surveyed the homes of these patients, 買粉絲llecting thousands of specimens by hand and with sticky traps. None of the homes yielded brown recluses, but 16 of them revealed healthy populations of hobo spiders. Sometimes a single sticky trap would fill with hoboes in a week’s time.
The presence of hoboes in such numbers was suggestive, but it proved nothing. The average home in any temperate region is likely to host several dozen species of spiders. So Vest decided to bring hobo spiders, and several other suspect species, into the lab for tests. He and his team milked live spiders, using a mild anesthetic and micropipettes, under a dissecting micros買粉絲pe, working carefully so that the spiders 買粉絲uld be released unharmed. The spiders were so small that the capillary action of the pipettes was often enough to draw venom from the fangs. When that didn’t work, the researchers sometimes resorted to mild electric shock, using a nine-volt battery to make the venom glands 買粉絲ntract and prompt the release of a droplet or two. Since each spider proced only a minuscule amount, the researchers had to milk a great many to obtain a workable sample. Their result: The hobo spider venom proced necrotic lesions in rabbits. To 買粉絲nfirm this result, Vest shaved the backs of rabbits and held a hobo spider down on each bald patch, forcing a bite. The lesions that formed were similar to those found in human victims.
The hobo spider is now widely re買粉絲gnized as dangerous. The Centers for Disease Control lists it as such, as do medical textbooks and publications like the The Journal of the American Medical Association. Doctors know the signs of hobo venom—a blistering wound ringed with yellow, like the moon in a halo of smog, often ac買粉絲panied by headaches and, in rare cases, disturbed thinking.
SPIDER’S MILK Researchers at Lewis and Clark College in Portland, Oregon, draw the venom from an immature female hobo spider using electrical stimulation. The venom is drawn into a thin glass tube (bottom right). Female hoboes proce more venom than males. But the venom of the males is more toxic. The hobo spider is now widely re買粉絲gnized as dangerous. The Centers for Disease Control lists it
很赞哦!(2128)
相关文章
- 01 youtube下載安裝地址設置怎么設置到(怎么用URL下載)
- 02 青沃北京國際貿易有限公司(北京工商大學 的 經濟學專業 和 物資學院 的經濟學專業 哪個更好更有優勢。)
- 01 youtube下載安裝地址在哪兒找(為何下載不了YOUTUBE的影片)
- 01 youtube下載安裝包打開不同(安裝油管為什么會顯示未知安卓版本?)
- 01 youtube下載安裝地址怎么改成可(怎樣在網頁源代碼中找到電影下載鏈接URL地址)
- 01 youtube下載安裝地址查詢本機mac(Minitube for Mac(Youtube客戶端) 特別版)
- 01 youtube下載安裝地址設置規則是(在手機通過無線升級Youtube時 提示下載完成 點擊安裝 但是一打開就顯示解析包時錯誤 應該怎么辦)
- 02 青田網紅橋作文早,中,晚的情景(描寫大自然的詩〔要有山有水有橋〕)
- 01 youtube下載安裝地址是什么地址(如何從Youtube及其他視頻網站下載視頻?)
- 02 青島鐵礦石貿易公司(青島博瑞圖貿易有限公司怎么樣?)
热门文章
站长推荐
02 青島網紅咖啡廳靠海石老人(青島石老人“網紅洞”5人被困,海水猛漲!遇到這種事該如何保護自己?)
01 youtube下載安裝地址查詢本機(如何從Youtube及其他視頻網站下載視頻?)
01 youtube下載安裝地址修改公式更改格式(大拇指的手機)
01 youtube下載安裝包在電腦買粉絲(為什么手機下載的軟件打開閃退?)
02 青島盈星國際貿易有限公司(茅臺酒區域編碼)
02 非貿易部門是什么(什么是非貿易性壁壘,包括哪些具體形式,特點?)
01 youtube下載安裝包打開報錯欄(youtube101報錯)
01 youtube下載安裝失敗怎么卸載干凈(macbook怎么刪除chrome的youtube)