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| 单词 | des | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 释义 | DESDESDESDES
desenUKdesand dec (dis)DESDESordiethylstilbestrol(dī'ĕth'əlstĭlbĕs`trôl), synthetic nonsteroid female sex hormone having the same physiological effects as estrogenestrogen, any one of a group of hormones synthesized by the reproductive organs and adrenal glands in females and, in lesser quantities, in males. The estrogens cause the thickening of the lining of the uterus and vagina in the early phase of the ovulatory, or menstrual, cycle ..... Click the link for more information. . In the 1940s and 50s DES was mistakenly believed to reduce the risk of miscarriage and was routinely prescribed for pregnant women believed to be at risk. In fact, it was later found to increase the risk of miscarriage and was then tested in a "morning-after" pill, a contraceptive pill that is taken after intercourse. In the late 1960s and early 70s a group of Boston physicians found that women whose mothers had taken DES during pregnancy had an unusually high rate of vaginal cancer, and it has since been implicated in various reproductive disorders and other conditions in female and male children of such mothers. The use of DES to prevent miscarriage was banned in 1973; its use as a growth accelerator in beef cattle was banned in 1979. It currently finds some use in the hormone treatment of certain types of cancercancer, in medicine, common term for neoplasms, or tumors, that are malignant. Like benign tumors, malignant tumors do not respond to body mechanisms that limit cell growth. ..... Click the link for more information. . DESDESDES(1) (Digital Entertainment System) See digital media server.(2) (Data Encryption Standard) A NIST-standard cryptographic cipher that uses a 56-bit key. Adopted by the NIST in 1977, it was replaced by AES in 2001 as the official standard. DES is a symmetric block cipher that processes 64-bit blocks in four different modes of operation, with the electronic code book (ECB) being the most popular. Triple DES By adding various multiple-pass methods, Triple DES increased security; for example, encrypting with one key, decrypting the results with a second key and encrypting it again with a third. However, the extra passes added considerable computing time to the process. DES is still used in applications that do not require the strongest security. See cipher, cryptography, NIST, AES and Fortezza. DESdiethylstilbestrol(DES) [di-eth″il-stil-bes´trol]DESDESDESAbbreviation for:deadly seven dental environmental stress dermal-epidermal separation diethylstilbestrol diffuse endocrine system Directed Enhanced Service distal esophageal sphincter (US) drug-eluting stent dry eye syndrome DESDiethylstilbestrol Gynecology A synthetic estrogen more potent than natural estrogens; DES use during pregnancy was banned in 1972, as in utero exposure before the 18th gestational wk results in a 3-fold ↑ in congental abnormalities–without impairing fertility or sexual function—and vaginal wall adenosis in 35-70% of exposed ♀ infants; 0.14% of cases progress to vaginal adenocarcinoma; other DES changes include obliteration of vaginal fornices, microglandular hyperplasia of the cervix–cervical ectropion, transverse ridging–appearance, and a 2.5-fold ↑ in 1º infertility Treatment Aggressive surgery–eg, vaginectomy, hysterectomy and lymphadenectomy. See Cockscomb cervix.DESdiethylstilbestrol(di-eth?il-stil?bes'trol),DESCAUTION!Diethylstilbestrol should not be administered during pregnancy. Such use has been found to be related to subsequent vaginal malignancies in the daughters of mothers who were given it.This drug was once used extensively during pregnancy to treat threatened and habitual abortion. An estimated 5 million to 10 million Americans received DES during pregnancy or were exposed to the drug in utero. Those who were exposed to DES in utero were found to be at risk of developing reproductive tract abnormalities such as clear-cell cervicovaginal cancer in women and reproductive tract abnormalities in men. These findings were reported in 1970; the use of the drug during pregnancy was subsequently banned in the U.S. in 1971 and in Europe in 1978. Women who took the drug are now known as DES mothers and their daughters and sons are known as DES daughters and DES sons, respectively. stentS18-896900 (stent)airway stentbare metal stentcovered stentdrug-eluting stentAbbreviation: DESendoluminal stentendovascular stentesophageal stent   intraluminal coronary artery stentself-expanding stentshort stentSpot stent.spot stenturologic stentdrug-eluting stentAbbreviation: DESDESSee DIETHYLSTILBOESTROL.DESDESDESDESDelivered Ex ShipDES
DES
Synonyms for DES
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