Environmental Engineering Reference
In-Depth Information
ish.types.can.eficiently.absorb.mercury.and.cadmium.from.the.environ-
ment.(Cheng.et.al..2011)..In.addition,.it.has.been.noted.that.the.hair.mercury.
level.of.the.subfertile.men.in.Hong.Kong.(with.problems.related.to.sperm.
volume. and. motility). is. linked. with. their. high. consumption. rate. of. ish.
(Dickman.et.al..1998).
Food Allergies
It. is. well. known. that. people. with. autism. are. more. susceptible. to. aller-
gies.and.food.sensitivities.than.the.average.person..This.is.likely.linked.to.
their.impaired.immune.system.(Edelson.2000)..Food.sensitivities.may.be.
responsible. for. numerous.physical.and. behavioral. problems. as. observed.
in. most. of. the. children. with. autism. who. took. part. in. this. study.. These.
included. a. wide. range. of. symptoms. such. as. headaches,. stomachaches,.
feeling. of. nausea,. bed-wetting,. excessive. whining. and. crying,. sleeping.
problems,. hyperactivity,. aggression,. temper. tantrums,. fatigue,. depres-
sion,. intestinal. problems,. ear. infections,. and. even. seizures.. In. order. to.
reduce. allergy. symptoms,. vitamins,. in. particular. vitamin. C,. are. used.
(Edelson.2000).
Heavy Metals and Oxidative Stress
OS. is. caused. by. oxygen. radicals. produced. by. the. body. in. manageable.
amounts. as. byproducts. of. normal. body. metabolism.. However,. their. prev-
alence. can. be. exacerbated. by. exposure. to. environmental. chemicals,. such.
as. heavy. metals.. Oxygen.radicals. damage.cells. (by. reacting.with. proteins,.
DNA,.carbohydrates,.and.fats),.and.interfere.with.signals.sent.between.cells.
in. the. body,. which. can. lead. to. autoimmunity. (Klein. and. Ackerman. 2003)..
Glutathione.is.one.of.the.body's.most.important.mechanisms.of.heavy.metal.
detoxiication.and.excretion,.as.it.can.bind.with.heavy.metals.such.as.mer-
cury,. lead,. cadmium,. and. nickel. (Stohs. and. Bagchi. 1995). and. can. be. more.
easily.iltered.out.of.the.body.
Due.to.limited.access.to.the.bulk.of.antioxidants.produced.by.the.body,.
the. brain. and. nervous. system. are. particularly. vulnerable. to. OS,. with.
neurons. being. the. irst. cells. to. be. affected. (Shulman. et. al.. 2004).. More.
importantly,. children. are. more. vulnerable. than. adults. to. OS. due. to. their.
naturally.low.glutathione.levels.(Ono.2001,.Erden-Inal.et.al..2002)..As.has.
been.revealed.that.deicits.in.glutathione.can.cause.degeneration.of.the.jeju-
num.and.colon,.glutathione.is.vital.to.control.proper.function.of.the.intes-
tines. (Martensson. 1990).. In. the. case. of. disabled. gut,. undigested. proteins.
pass.through.the.gut.and.cause.oxidative.damage.to.the.brain.and.nervous.
system..In.addition,.intestinal.disorder.can.reduce.the.intake.of.nutrients.
such.as.zinc,.selenium,.and.cobalt,.which.are.important.to.eliminate.heavy.
metals.in.the.bodies,.and.thereby.aggravate.the.poisoning.effect.of.heavy.
metals.(White.2003).
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