results in what types of contamination
131235
Despite precautions, it may be almost impossible to decontaminate human skin. As well, needle coring may result in a small core of patient skin entering the needle at the time of blood collection and viable bacteria may be associated with deeper layers of skin, despite adequate surface disinfection. CBS has recently introduced whole blood collection bags with a sample diversion pouch for removal of an initial aliquot of 30-40 mL of donor blood. This approach reduces, but does not entirely eliminate, the rate of contamination by skin flora. However it does not decrease the rate of bacterial contamination due to other potentially more serious causes, in particular asymptomatic donor bacteremia.
23086
Just a little FYI.  ANY food that comes from plants, such as flour, corn(even canned) pancake mix, bread, etc. will have small traces of bugs in it.  Disgusting, I know, but this is mandated by the US FDA.  A certain percentage of bugs and debris are allowed into our food.  I don't remember what the percentage is right now, though.  I saw this on dateline a while back.
171677
Eating food or drinking water contaminated with high levels of creosotes may cause a burning in the mouth and throat, and stomach pains.\n\nBrief direct contact with large amounts of coal tar creosote may result in a rash or severe irritation of the skin, chemical burns of the surfaces of the eyes, convulsions and mental confusion, kidney or liver problems, unconsciousness, and even death. Longer direct skin contact with low levels of creosote mixtures or their vapors can result in increased light sensitivity, damage to the cornea, and skin damage. Longer exposure to creosote vapors can cause irritation of the respiratory tract.\n\nLong-term exposure to low levels of creosote, especially direct contact with the skin during wood treatment or manufacture of coal tar creosote-treated products has resulted in skin cancer and cancer of the scrotum. Cancer of the scrotum in chimney sweeps has been associated with long-term skin exposure to soot and coal tar creosotes. Animal studies have also shown skin cancer from skin exposure to coal tar products.\n\nThe International Agency for Research on Cancer (IARC) has determined that coal tar is carcinogenic to humans and that creosote is probably carcinogenic to humans. The EPA has determined that coal tar creosote is a probable human carcinogen.\n\nThere is no unique exposure pathway of children to creosote. Children exposed to creosote will probably experience the same health effects seen in adults exposed to creosote. Children who played on soil contaminated with creosote had more skin rashes than children who played in uncontaminated areas. It is unknown whether children differ from adults in their susceptibility to health effects from creosote.\n\nStudies in animals have shown birth defects in the young of mothers exposed to high levels of creosote during pregnancy, but no similar studies have been performed on humans. Some animal studies indicate that creosotes may cross the placenta and reach the fetus. Because chemical components (PAHs, cresol, phenols) of coal tar creosote may be stored in body fat, they may be found in breast milk and could pass to nursing infants.\n\nIn 2003 the European Union banned creosote for amateur and unlicenced professional use, due to concerns over these health effects, noting that recent research had shown that the risk of skin cancer had perhaps been underestimated previously.
372367
USE DIFFERENT STAINING FOR BACTERIA EX. GRAM STAINING. LOOK UP DIFFERENT BACTERIA STAINING
648537
Whenever I pellet DNA in the lab it often comes down in a white pellet because of the salts we use to precipitate it. This may or may not be contamination depending on your point of view and what you are trying to do (for us it is not contamination).
201925
The top concerns that come to my mind are Radon gas and mold/mildew if the basement is damp.  Both can be tested for if you are concerned.
538957
There's quite a few. Just google solubility chart. Here's one I found.
931
Working in environmental analytics, pollution situations are a common experience. One of the most common occurrances of pollution is sullage or liquid manure in surface waters, absolutely deadly for all life forms requiring oxygen from the water, and poisonous for plants in high concentrations, too.\n\nPollution can be quite natural...
372107
Your question is incomplete.  What type of stains are you talking about?  Looking at the properties of the stain and you may find the answer you need.
405470
it's called a gram stain.  if the microbe stains, then it is said to be gram positive... if it doesn't stain (or stains poorly), then it's gram negative.\n\nyou have to use all the stains to complete the gram staining process
98671
Sloppily-produced moonshine can be contaminated with toxins, mainly from materials used in construction of the still. Despite the well-known hazards, it is claimed that stills constructed using car radiators for a condenser are still used. The lead used in soldering these radiators ends up in the moonshine, and in some cases, glycol products from antifreeze used in the radiator can appear as well. Both are poisonous.\n\nOccasionally moonshine is deliberately mixed with industrial alcohol-containing products, including methanol and denatured alcohol. Results are toxic, with methanol easily capable of causing blindness and death.\n\nMethanol and other toxic alcohols can occur naturally in distilled spirits and are called fusel oils. The methanol is concentrated in the first few percent of condensate produced in a batch. The fusel oils are mostly found at the end of a batch or run. Ordinarily these portions are discarded, though if ingested alone or included with the rest of the distilled product it may cause toxic effects. Like commercial beer, wine, and liquor, properly produced moonshine contains small amounts of methanol at levels that are not toxic. A common way to determine the "quality control" of a batch of moonshine was to see if the moonshiner would dare to drink it.\n\nIn addition, moonshine that is over 100 proof (i.e. 50%) is very flammable and easily ignitable. This is especially true during the distilling process in which oxidized vaporized alcohol can accumulate in the air if there is not enough ventilation.
531860
anti-septic solutions use halogenated phenols \nhalogenated phenols are less reactive than general phenols
665609
Where you going?...the nail salon i use has a pot of disinfectant that they drop their utensils into during treatment and then they put em in the Sterilizer after each customer...im sure there are regulations regarding this in place....contact your local health authority...they should be able to inform you of the practices and you could report them whilst you are enquiring....
368825
Wrong category, but rinse it with solution.
257570
Garbage Dumpster\nlandscaping\nsecurity\noutside lights\noutside water\ninsurance\nremodelling\nadvertisements\npainting
633324
Health effects\nThe major concern is that there are many sensitive land uses where people are in direct contact with soils such as residences, parks, schools and playgrounds. Other contact mechanisms include contamination of drinking water or inhalation of soil contaminants which have vaporized. There is a very large set of health consequences from exposure to soil contamination depending on pollutant type, pathway of attack and vulnerability of the exposed population. Chromium and many of the pesticide and herbicide formulations are carcinogenic to all populations. Lead is especially hazardous to young children, in which group there is a high risk of developmental damage to the brain and nervous system, while to all populations kidney damage is a risk.\n\nChronic exposure to benzene at sufficient concentrations is known to be associated with higher incidence of leukemia. Mercury and cyclodienes are known to induce higher incidences of kidney damage, some irreversible. PCBs and cyclodienes are linked to liver toxicity. Organophosphates and carbamates can induce a chain of responses leading to neuromuscular blockage. Many chlorinated solvents induce liver changes, kidney changes and depression of the central nervous system. There is an entire spectrum of further health effects such as headache, nausea, fatigue, eye irritation and skin rash for the above cited and other chemicals. Clearly at sufficient dosages a large number of soil contaminants cause death.
204215
If you are really interested in this topic, I recommend reading "The Plutonium Files," a recently published book. It reports on the negative health effects of uranium and plutonium, specifically the results of secret tests performed on civilian citizens and members of the military, by our government. (Almost all of whom were unaware they had unwittingly become guinea pigs.) Very interesting and informative.