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About The Battalion. (College Station, Tex.) 1893-current | View Entire Issue (Aug. 24, 1983)
idnesday, August 24, 1983/The Battalion/Page 9B Birth control nasal spray? eters assunit s housewives 1 with dean, iiid groomhj ta show tbl and plan-to per shampoo vors morefrt- recommend examine it* , evaluate th lofnewtargtt ) a fresh pm : the attitude le new group marketint United Press International DETROIT — Additional lesearch on how the brain egulates production and re- :ase of sex hormones may ad to a nasal spray con- Iraceptive within a decade, Iccording to a University of | (ichigan researcher. Dr. John C. Marshall said te key is a hormone called inRH, for gonadotropin- eleasing hormone. w GnRH is the brain’s che- lical messenger that reg- lates the pituitary gland’s :xual functions, induding le production and release of ormones that control sexual evelopment and the produc- on of eggs and sperm. Besides serving as a birth antrol aid, Marshall said nRH also could improve icrapies for sexual underde- lopment and treat tumors fthe reproductive system. Marshall and colleagues de- eloped the methods that re use to measure mi- ute levels of GnRH normally Hight vision devices still evolving , “Beat It.’ v gone worldwide si! archers lion copies. ■Iling records MTV's list grown fi to 160 in IS i caught ihti grammers. United Press International iJBC became! (ALLAS — It’s a great leap 1 networktoi ward, being able to turn jsic field will ht into day, for search and ir* ue pj] ots f or undercover is, for soldiers who now fight ip with Saturi und the clock, and for the ,en-odd firms that make ht vision equipment a world- ^ , e $200 million industry. Of//) B ut l h e technical clevelop- ^7 Kr nts that make night vision jible, mostly made in the 15 its since the U.S. Army intro- ed the old "Starlight Scope” Vietnam, promise profound ingesin the way we do things. And it is the technical de- jpments that you have to the studs :ch. Since the ability to see in igrams foni dark, has been made com- rcially feasible, the market- ose tallies Aend of the business has taken ontheam# e of itself. Numerous non- linthefoods: itary uses have been found, yeatanddoi Night vision devices started i a shaker,al h what industry specialists ily escalatesi “zero generation,” the in intake bey red rifle scope. Perfected af- amounts,fe the Korean War, such de ls consisted of an infrared dium intake |p and a pair of goggles that present in the body. In 1979, he and Dr. Robert P. Kelch demonstrated it was possible to induce puberty by adminis tering GnRH. GnRH, discovered in 1971, was approved for use as a drug tnis year. “Persons without sufficient GnRH never go through pu berty,” Marshall said at a meeting of the American Association for the Advance ment of Science. “But if we administer GnRH, we can produce normal sexual de velopment. We also know that for normal sexual function ing, not only is the amount of GnRH important, but that the message must be delivered in termittently.” Every 90 minutes, the brain sends some GnRH to the pituitary gland to tell it to re lease and make more of the luteinizing hormone for sex ual development and the folli cle-stimulating hormone for production of eggs or sperm. “Giving a patient GnRH ev ery 90 minutes isn’t very prac tical, so in an effort to get around this problem GnRH was chemically modified to make it more potent,” Mar shall said. “A version was developed that lasts for eight hours and has to be given only three times a day.” But after several trials, “a curious thing occurred,” Mar shall said. The pituitary gland was “switched off’ by the con stant high level of GnRH. “So we have seen two diffe rent actions,” he said. “Per sons with too little GnRH fail to develop sexually and always remain pre-pubertal. If we give a constant high level of GnRH, however, we block either ovulation or sperm pro duction. “Thus a constant level of GnRH could be used as a con traceptive,” he said, calling GnRH “a possible contracep tive of the 80s and 90s.” Administered as a nasal spray once a day, GnRH can block production of an egg without requiring estrogen hormones that raise the risk of blood clots, he said. Clinical trials for a GnRH contraceptive already have been conducted in Sweden for a year, he said. Marshall also described GnRH’s promise for treating certain tumors. Some tumors are fed by male hormones produced in the testicles. To stop such tumors requires stopping hor mone production — either by surgical removal of the testi- , cles Or by administering female hormones. “Neither treatment is desir able, but perhaps constant GnRH could stop hormone production and reduce the psychological consequences of treatment,” he said. “If we can understand the mechanisms of action of GnRH, we have tremendous potential for using that infor mation clinically. “The groundwork has been done,” he said. “Now the ap plications are just beginning to be known.” Heroic dog gets help from public United Press International HOLLYWOOD, Fla. — The public is offering to help pay for surgery for Muffin, a German shepherd that was wounded while chasing away an armed bandit who had tried to hold up the dog’s owner. Muffin, a 4-year-old male dog who loves children, was re covering Monday at Hollywood Animal Hospital where he had surgery Saturday for gunshot wounds in the legs inflected dur ing the robbery attempt. Anzae Gooden, Muffin’s owner, had been afraid she would have to ask the hospital to destroy the dog because she did not have $600 to pay for the operation. But when the public heard how the dog saved Ms. Gooden, calls began to pour in offering to help pay for the surgery. Muffin pursued the gunman as he fled. Finally the man climbed onto a car hood, shot the dog once in each leg and then escaped. Dallas Times Herald V2 price Only ^S 50 per semester Home and Dorm Delivery fas'® % ©r >ov igh to be signifo bat for womc {Terence ntJf he men’s o eater quantii erefore, grei ty of stud i beverages, d snack lit 1 ges, and Tiolic bevera mostly by i" 1 g snacks t and lunch often used 6 For aftert* een lunch t students® ited beveri? was foods gums cate? : students ms for evt® sen suppef 1 snack food ■ms as pr el ‘ chips, oW rm,” he pick up light on that end of the spectrum. “We call that the ‘zero-gen’ because we didn’t really know then there would be another generation,” said C.M. Wood, president of the Association of U.S. Night Vision Manufactur ers, whose Chicago-based NiTek, Inc., was one of the pioneer developers. Aside from its cumbersome size and weight, the scope made snipers using it vulnerable be cause anyone else who had in frared goggles could also see the infrared lamp. To solve that problem, West- inghouse, RCA and Machlett Labs of Stamford, Conn., de veloped the image intensifier, a totally new passive approach that used light from the moon and stars, filtering photons and infrared light from the invisible end of the spectrum and pro jecting against a phosphorescent screen an image visible to the human eye. In 1966, ITT and the Dallas- based Varo Corp. started pro ducing image intensifiers and have remained the stable pro ducers since. Wood said. The “first-gen” devices using this technique appeared in Viet nam as the Starlight Scope. Then the 1975 Yom Kippur War in the Mideast sent shock- waves through the military tech nology community. “It became known worldwide that night vision was a major fac tor in the way the war came out,” Wood said. The Army was procuring second-gen devices, an improve ment using the same tri-alkaline cathode, updated to allow manufacture of smaller, lighter devices — such as night vision goggles for helicopter pilots and vehicle drivers. When the pilots complained the image produced was not sharp enough for low-level flying and aiming precision- guided weapons, the industry developed the third-gen, a com pletely redesigned system re placing the tri-alkaline cathode with one of galium, aluminum and arsenic that increased sensi tivity to light. The next generation, Wood says, is thermal imaging, which reads heat emissions and pro jects them as visual images. Meanwhile, several non military uses for night vision equipment have been found. 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