Document bag3n4Y6oXY0D8Vqo2ZXbYRg3

FILE NAME: Synkoloid (SYN) DATE: 1975 SYN014 DOC#: SYN014 DOCUMENT DESCRIPTION: Newspaper article - Asbestos Minerals Detected Several Spackling Mixes *n:is i'ccn *iiuwn Inr both 2r?u^y--"i "" ->isi/y * ir-** 'Although Xh^y Ivtvv *iot yet pro* ductd at) r.nlicn-nmiUxty reaction for Duffy pccalive, the scientists believe there is a substance there, and tint 1stance provides immunity against jx malaria. *; '.'V / !, ;{t '``M r. t- ,r i 'ii 'C ii.1!' (ij!-;:.' For e; ample, vivax malaria docs not I* n- exist in West Africa, where 90 per cent :a, of the population is Duffy negative. i **i aiiiLhJil.-UvKiittty**' ,;|li .'lilS ifiB ii-ii rc Most blacks in the United Stales also Inverted microscope sequence faltcn a iNIK shovs ey are resistant to vivax malaria, and 68 vasion of red blood ceil liy malaria parasite. After attachment by t;.e paraMio nc per cent are Duffy negative. (arrow) there is marked distortion o; the ceil, followed by slow invasioi:. .a (Because of these facts, the scien fory results using monkey malaria to metrication and through environmen tists were able re transfer their la bora- vivax malaria.) tal controls. Further, screening showed that all For example, in West Africa, where Caucasians tested were Duffy posi falciparum malaria--the >not virulent tive. of the three common fcrnir, vivax, c "This is highly suggestive 'that the falciparum and malsrisc--is preval t. double Duffy negative is the dctci- ent, nearly 100 per cent of pre-school A- minant of resistance," Dr. Miiler said. children have the disease. Anouier This leads to the possibility--still in form of malaria. Ovale,'exists only in i 1 *4 Jiv*. i - : y--1 the future, neutralizing however--cf developing a antibody tc the Duffy positive antigen that would block in \ ' . 1*' * *,VV11\ *v\ ***0%*J '5 vasion by the malaria parasite. Such a preventive approach could offer new hope for populations unable West Africa. If the genetic factor involved in these forms of malaria could be found, a simple vaccine might be developed to stop the grownh cycle. One merozoite. once it penetrates a K\ .i : : ' * / t ' ^ S to rid themselves of the disease as the cell in the laboratory, fer example, United States in effect has through multiplies into 0 in 24 hours. t / * * / . r ^-{- A s b e s to s r-n L \h; i t kU l C i l z detected Iei SeveraS ;.Spacfeiicsg KiSxes -- tt5. Research Triakgle Park, N.C.--Ap- during home construction and rcphotos preciable amounts of chrysotilc or p:-ar," Dr David P. Rail, NIEHS di- Mary McGiiiniss other asbestos minerals were found in "Sector, saiq. samples of sparkling and patching "Acid*i*tr-onal work by the scientists 7 p . r . f f Q `r - p P f f f i V#v l 6/ compounds analyzed by grantees of suy.zcsts that members of the entiic ? e tit U tm V*4* Wth14e ONwational Institute of Environmen household or other occupants of a $ .?! r*i) <f^vi-f5 ^ T tal Health Sciences. building may also inhale asbestos fi The investigators also found sub bers. This coulJ occur during ir.ixin;:, W- ' '*< ii i? if - t : i i i . '* iiroaJ> stantial amounts of quartz, talc, and sanding, or cleaning up of debris,n he :5 ot lasers, ranging from low pov/ea*! other minerals. said. o ones producing no harmful offecta to Furthermore, air samples obtained Dr. Rail said the investigators, all of those that could cause biological dam* during the use of asbestos-containing the Mount Sinai School of Medicine. or age from reflected as well as direct ex spacklc compounds were analyzed and New York, have accumulated other od posure. Those which could produce showed concentrations frequently in evidence indicating that far less than damage must carry warning labels. excess of the current. occupational the intense exposure of the work en id Lasers used for medical treatment standard for permissible asbestos ex vironment is capable of producing as of must, in addition, have a means of posure levels. . bestos-related disease. u- measuring the radiation intended to ir- Fiber counts mcasuied during mix The investigators analyzed 15 repre ..d radiale the human body. ing were found to be 7-12 times greater sentative samples of consumer spack- !.C FDA said mast of the required than the current occupational stand ling and patching compounds and 10 standards either aheady arc in use or ard. Detectable fiber concentrations of industrial rirywali taping com ,ds can he incorporated into existing prod were found in adjacent rooms during pounds for asbestos mineral contents. 'US uces at little expense. mixing, and fibers were still sus Five of the 15 consumer spackling ''es Under the regulations, lasers must pended in the room air at least 15 min- and' patching samples contained ap ,::t e protective housing. lies after mixing had censed. preciable amounts of chrysoiile or ) users also must have a system for *`ThcM* fmdirius su rrest the possibil other asbestos minerals, as did 9 of t sps indicating when they arc ready for use. ity' of significant asbeMos exposure .10 industrial prod 1Vv . ---------r-.-*-< .*V"f HfftiiT"**' 7> ^- vV/