[ RadSafe ] o.4 Sv extra radiation over 10 years may protect from much teratogenesis
howard.long at comcast.net
howard.long at comcast.net
Sat May 31 11:08:58 CDT 2008
Evidence of protection from teratogenesis by many times usual background radiation
should be added to Ranier's excellent but brief discussion of teratogenesis (genetic disease).
"- congenital heart malformations -1.5 cases per 1,000 - under 19. "
[10,000 persons 9-20 years in Taiwan apts averaged 0.4Sv from Co60 in construction steel]
"-official statistics and hospital experience, the prevalance rate of congenital malformation is
23 cases per 1,000 children. [in other local population]
- it appears that significant beneficial health effects may be associated with this chronic radiation exposure."
Is Chronic Radiation An Effective Prophylaxis Against Cancer? Chen WL,Luan YC et al
J Am Physicians and Surgeons 9:1 Spring 2004 and www.aapsonline.org
-------------- Original message --------------
From: <Rainer.Facius at dlr.de>
> Gary and all,
> to add some more relevant facts relevant also with respect to radiation
> protection to this somewhat confusing or in part obfuscated exchange:
> Environmental toxins affect either cells of the soma or of the germ-line
> yielding somatic or genetic sequelae. Soma and germ-line constitute an
> exhaustive and mutually exclusive partition of the cells of higher metazoa.
> Somatic effects affect the exposed individual. Genetic effects are imprinted to
> the genome (possibly including the epi-genom) of germ-line cells and thereby
> become transmitted to the F1. Non-lethal, genetic effects accumulate in an
> exposed population leading to the so far - about 3000 known hereditary
> diseases in humans.
> Effects to the progeny of exposures between conception and birth can be somatic
> and genetic again. Genetic effects in utero again become manifest not until the
> next, the F2, generation.
> Somatic effects to progeny of exposures in utero result in untoward outcomes
> such as stillbirth, premature birth, or teratogenesis (malformations) such as
> spina bifida or microencephaly. Teratogenesis, i.e., the disturbed growth
> processes involved in the production of a malformed neonate results from
> irregular timing or incomplete sequences of organogenesis due to stimuli from
> the environment which includes the maternal organism.
> Addressing the business of radsafe by turning to ionizing radiation as an
> environmental toxin, the findings from the most important exposure of human
> populations, i.e., the survivors of the atomic bombings demonstrate that this so
> far most severe exposure did not yield any measurable genetic effect in the F1
> generation. Concerning teratogenesis, fetuses exposed in a period between 8 to
> about 15 weeks after gestation showed few incidences of microencephaly as the
> only teratogenic sequela from the atomic bombing. Importantly, the corresponding
> dose effect relation crudely as it could be determined displayed the
> hallmark of deterministic radiation effects, i.e., a more or less marked dose
> threshold below which no effects will ensue. Given this empirical data base, the
> claim that radiation from depleted uranium can engender genetic or teratogenic
> health effects at the exposures in question must be relegated to the realm of
> science fiction.
> Regards, Rainer
> Off topic: From the perspective of the conceptus/fetus the statistically largest
> environmental risk of irregular organogenesis and an untoward outcome of a
> pregnancy nowadays stems from the mental constitution of the maternal organism
> in particular if the fetus carries two X chromosomes.
> ----Original Message-----
> From: radsafe-bounces at radlab.nl on behalf of garyi at trinityphysics.com
> Sent: Fri 30.05.2008 19:22
> To: radsafelist
> Subject: Re: [ RadSafe ] teratogenesis can be pre-utero
> Statements like this show that James is not competent to debate this issue.
> When you get
> caught with your pants down like this, especially when it is pointed out gently
> as Rainer has
> done, the correct response is to admit the blunder. Instead, James (whatever
> his name is
> right now) pretends to be absolutely correct.
> -Gary Isenhower
> On 30 May 2008 at 6:34, James Salsman wrote:
> > Dear Dr. Facius,
> > Thank you for your message:
> > >... teratogenesis by definition refers to effects
> > > engendered IN UTERO....
> > On the contrary, any damage to spermatogonium, oogonium, oocyte,
> > ootid, or ovum chromosomes prior to folliculogenesis may also result
> > in congenital malformations.
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