| Show B10 SCIENCEMEDICINE The Salt Lake Tribune K Experts Keep Vigil Cell Transplants May Hold Key to For Mother 111 Of All Asteroids SAN BERNARDINO COUNTY SUN PALOMAR MOUNTAIN CALIF — Eleanor He lin doesn't lie awake nights worrying about meteors that might slam into the Earth and annihilate humanity But she does spend most of her waking hours looking for them He lin is the leading researcher in the discovery and identification of asteroids — wayward rocks from the asteroid hilt and dead comets that come near or cross Earths orbital path Originally the search for such objects was relatively empirical The project was started simply to identify these objects Helin says recalling the origins of her search When He lin and others doing similar work began finding sizable asteroids coming uncomfortably close to Earth — in 1989 for instance an asteroid 250 kilometers in diameter passed within 200000 miles of the planet less than the distance of the moon — the question arose: What happens if were hit? According to Helm if a rock the size of the FC asteroid the one tracked in 1989 were to collide with the Earth it could result in the destruction of nearly every living thing Those who subscribe to the theory that the dinosaurs were wiped out by an asteroid or comet estimate it was a body of similar size that did the damage That event took place 64 million ago years -I think a threat is there but I also think its very small" says Ken Lawrence Helins only assistant -- On the other hand if something even the size of a house lands in Los Angeles that's going to be a dramatic e ent Helm n and her colleagues figure there are about 2000 objects that could be classified as objects ranging in size from 100 meters to 40 kilometers in diameter What is somewhat troubling is that only 223 have been identified to date "We don't know where they are and that's the concern" Helin says Of the 10 that have been identified "we know of no asteroids that are a danger but near-Eart- h 20-ye- Continued from B9 r il 71 7 ri7 " ici) t 1:11 L rj -i L near-Eart- - A J 1—r t t 1 t 1 1 v 71 ia- '4 - id- -4 Iv 2 AS t - l Low t AS L: A" i It- 1 - r- r7 :- -- -r ' '- -- rr - d tl fr - b) --- -- i Li ILI 471 7 t Ail Piece JP t tr'1-i1)!Cilly- ilt-7:0- LAOSW hi LlOidtrACti loop t' 10 La t V4'11 gr Ito I i 1 PI4 '''"--:- ttt ' -- SIZE SIZE z L it) SIZE :z tIol' 47 : 'al 5014W-- 17 - ? 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SET 46 11 -- 0 A' 7ik A- — 4 - :4 $499 2SEPTC 42 4 :ItZ ' 4kt-x-7- 411Sr- - — sy $199 - cal Society of the Pacific The group produces slide sets the "Universe in the Classroom" newsletter and other materials used in thousands of school and college astronomy classes around the wot Id Asteroid Fraknol was discovered by Edward Rowell of Lowell Observatory in Flagstaff Ariz s51 N KINGii:":: SIZE pray" d i:l'i" - $ 13 iliwni t1r3 3 Litjuu rim t:t 1 il 1 - : : QUEEN Til DI ''77' SIMMONS :''N ::" $149 4 EA PC Ai d "4!r)":4 4 ‘- - k:-- t--) ri r77: r"1 t:— i ''1 f t- Li-- cy' u N : Reg Price II v --- - - EA PC 1 1 1 A fl tAl t4) It a vo I ) 1 A '": : 404) F:1C 71 F1 FULL : --:-- r2 11'7 (71 Sr ( 1i' ' AI ‘ n' 4 Lir -)- 2 -- 4'f::--4----------A4v-4Ak-Oe:- ' - :- SALE TWIN :'- :is - :: fl I t73 - r7) ' PI:M1' A '717uo 01-4:'-:--'!:7:- : LI :: : Francisco-base- 0'Tr s2ePtiece ' teristics And of course there is the factor of time disIn terms of a short-tercovery" Helin says "it's very nebulous what we could do about it The closer it is the more likely it would be we'd have to use nuclear weapons If it gets down to a matter of weeks all we can do THE ASSOCIATED 1 QUEEN SIZE MATTRESS '1771 tr71 - 6555 WEST 2100 SOUTH 0 THE SAME AS THE QUEEN Each AS 250-260- YOU HAVE EVER WANTED TO BUY A KING SIZE 1-- 1 Must be sold as sets 4 h Union i - ' ttf3 11 t 'A r' relit 4 KIDS (6 THRU 12) 6200 5 AND UNDER FREE 01311 PHONE MATTRESS NOW IS THE TIME THEY ARE PRICED r:: Th c--- '!- LTD SPORTSMAN ADULTS 6600 GATE OPENS 5 PM RACING 7 PM ‘4 LI - --- L LA 1 MATTRESS r77 SPORTSMAN MINI STOCK STREET STOCK MINI SPRINTS A en Ei TWIN SIZE I SEPT 26TH 011artg'S'i : LI tA' Li- - ''-- SATURDAY L (LIMITED LATE MODELS) ri 12" r tk I I LI- 6 L iit t L1 1 -- t 1 r-- Li t IF qt n 1 1 ki h ios They include using an unarmed rocket that would simply slam into the asteroid fragmenting it or diverting its path as well as rockets armed with nuclear warheads designed to accomplish the same task Which strategy would be implemented would depend upon how close and how large the asteroid is and its physical charac- is til 1 I “ 4 IA 01 cr 7 II 172 (--1 I Q:2) I9 tn r raz:i14 f pI 711 SEM KECA RIRICCES risk of side effects including infections and cancers And unlike heart liver or lung transplants cell implants aren't necessarily intended for patients on the brink of death Thus they require a safer way t() disarm the immune system At CytoTherapeutics in Providence researchers are -- hiding" implanted cells by enclosing them inside plastic capsules 'C 71 i: That "but" is beginning to concern more and more people Currently He lin has asked for $50 million to fund a network of telescopes around the globe with the goal of identifying 95 7c of all asteroids within the next 25 years So what if an asteroid is found that has the Earth in its sights? Thanks largely to the nuclear-arm- s race Helin says we have the technology to divert or destroy the heavenly bullet All we have to do is find it in time "The longer the lead time the better obviously" Helm says "There are any number of scenarnear-Eart- r- I I 1 I ! : d All of the cell transplant work confronts the barri- full-tim- e ''''')t? p- 1 PRESS CHICAGO — It may make er of rejection by the recipient's immune system Drugs that suppress the immune system carry the ti F 1 L:06:12i - 14 T Thy took more than 700 temperature readings from 148 some traditionalists hot under healthy adults over three days The team led by Dr Philip the collar but new research A Mackowiak reported their the mark century-olsuggests of 986 degrees as "normal" findings in Wednesday's Journal of the American Medical body temperature isn't normal Association at all The current notion of normal Doctors at the University of dates to 19th century scientist Maryland School of Medicine Carl Reinhold August Wundersay 989 degrees in the early lich morning and 999 degrees overWunderlich used cumberall should be regarded as the some far less reliable methods upper limit of the normal oral than today's modern instrutemperature range in healthy ments used for oral or rectal young adults readings the researchers said THE ASSOCIATED ports f"f79AA 1 Temperature's Risingfor Wormal' Bad) Heat muscle-strengt- one-da- y 1" '71 Beating Diseases searchers said rodent cells have been implanted into the brains of baboons that have a condition similar to Huntingtorfs disease The implants apparently reversed some of the damaged nerve networks that in Huntington's patients lead to progressive loss of control over the body Human tests may not be far off Cell transplants have raised hopes of treating the degeneration of muscle fibers that weakens young boys with Duchenne muscular dystrophy So far about 30 youngsters with the ultimately fatal genetic disease have received injections of myoblasts — normal but immature muscle cells — to determine whether the cells can supply a structural protein thafs missing in Duchenne patients Several research centers have reported ambiguous results and Wood of the Muscular Dystrophy Association said that -- as a treatment myoblast transfer is not there" Dr Peter Law of Memphis Tenn however reh ported at the congress that he has observed improvement in several boys with muscular dystrophy who received injected myoblasts In a later interview Wood said other scientists have not been able to duplicate these results and have raised a number of questions about the validity of the re- transplant methods that don't depend on donor cells from human fetuses Although those cells are inherently ideal for transplants their use in federally funded research is outlawed by a ban dating to the Reagan administration Even many scientists who oppose the ban say cell transplants must be freed from fetal sources The notion of cell implants is not new but only recently has the research — and the optimism — burgeoned That's partly because it has taken scientists many years to succeed in growing cells outside the body They also now know much more about the immune system and how to prevent it from rejecting transplants said Dr Paul Sanberg a neurosurgeon at the University of South Florida "I believe that you are about to begin writing the next chapter in human transplantation" J Dennis O'Connor a biologist and chancellor of the University of Pittsburgh said in Pittsburgh several months ago at the first international congress of the newly formed Cell Transplant Society The congress was to be a event but the outpouring of scientific papers from researchers prompted the organizers to extend it to two days then three -- And at that ifs a little overcrowded- said Camillo Ricordi a transplant specialist at the University of Pittsburgh who chaired the congress Among the most promising research reports were these: In Sweden brain implants of fetal tissue have improved the movement disorders of patients with Parkinson's disease More work must be done however before the technique can be offered as therapy said Dr Anders Bjorklund a leading neurosurgeon At McLean Hospital in Belmont Mass re 77t Thursday September 24 1992 EL:FLO 7i) PH md I iii Oa 141Rail uLILI'L'AY S 461-30- E 00 0 PH 2614800 SYTACUSI 1693 W 2700 S PH 774-23- 4739 L 4000 W Pt IF2011 0 ILL WILLEY lo 90 Night Satisfaction 2 Guaranteo Next Day Deliver (Ask year selimperoon he Asnolle) 3 KLIMISAIMALLEY 967-480- REASONS TO BUY YOU2 LIATTRIss 4s Ss Pkk-u- p of your old bedding 90 days same as cash We wM not ha undorseld FREE - |
