While the two herbicides that make up Agent Orange, 2, 4-D and 2, 4, 5-T, remain toxic over a short period — a scale of days or weeks — they quickly degrade.

While this method can be effective at trapping particulates produced by combustion, it does not filter out harmful gases which may be toxic or which displace the oxygen required for survival.

While nitrate is much less toxic than ammonia, levels over 30 ppm of nitrate can inhibit growth, impair the immune system and cause stress in some aquatic species.

While most herbal teas are safe for regular consumption, some herbs have toxic or allergenic effects.

While it has been difficult to establish specific health effects in humans due to the lack of controlled dose experiments, studies in animals have shown that dioxin causes a wide variety of toxic effects.

While generally not very toxic, the outgassing from it can cause hypercapnia due to buildup in confined locations.

While not directly toxic to fish life, like ammonia, nitrate can have indirect effects on fish if it contributes to this eutrophication.

While Yellow Starthistle and perhaps other species are toxic to equines, some other livestock may eat the non-spiny knapweeds with relish.

While the sap and latex of many plants of the spurge genus are indeed toxic, the poinsettia's toxicity is relatively mild.

While chronic toxic effects on inhabitants of the bay are not found, impairment of marine biota were more evident.

While it is the greatest mineral resource ever encountered, conveniently gathering many potent elements into an easily harvestable form, it also brings with it considerable hazards: areas rich with the rapidly spreading Tiberium substance are eventually exhausted of their native ecosystems, and become too toxic to support normal carbon-based life.

While angrily revoking Kerik's $ 500, 000 bail during the trial, Federal Judge Stephen C. Robinson delivering what the NY Times termed " a withering criticism of Mr. Kerik from the bench, describing him as a ' toxic combination of self-minded focus and arrogance.

While the exchange of methionines by selenomethionines appears to be tolerated ( at least in bacterial cells ), unspecific incorporation of selenocysteine in lieu of cysteine seems to be highly toxic.

While some dyes are actually used in food coloring, most dyes are very toxic, and often carcinogenic.

While studying the effects of acridine on paramecia cultures, Oscar Raab, a student of von Tappeiner observed a toxic effect.

While Graham's specific theories on the dangers of " venereal excess " have no scientific footing, he was correct in his broader stance against additives as both alum and chlorine are now known to be toxic.

While zinc is very important in the biochemistry of living organisms, cadmium and mercury are both highly toxic.

While the minimum freezing point of a glycerol-water mixture is higher than an ethylene glycol-water mixture, glycerol is not toxic and is being reexamined for use in automotive applications.

While consensus exists that alcohol is a teratogen, there is no clear consensus as to what level of exposure is toxic.

" – While the toxic / hallucinogenic fly agaric is usually bright red or yellow, the deadly destroying angel is an unremarkable white, and the deadly Galerinas are brown.

" – While it is true that some otherwise inedible species can be rendered safe by special preparation, many toxic species cannot be made toxin-free.

While the toxic effects of flecainide are closely related to the plasma levels of the drug, it is unfeasible to check the plasma concentration in an individual on a regular basis.

While Camassia species are edible and nutritious, the white-flowered Deathcamas species ( which are not in the genus Camassia but in a number of genera in the tribe Melanthieae ) that grow in the same areas are toxic, and the bulbs are quite similar.

While Camassia species are edible and nutritious, the white-flowered Meadow death-camas ( which is not in the genus Camassia, but part of the genus Toxicoscordion ) that grows in the same areas is toxic, and the bulbs are quite similar.

While cyanobacteria have been traditionally considered algae, recent works usually exclude them due to large differences such as the lack of membrane-bound organelles, the presence of a single circular chromosome, the presence of peptidoglycan in the cell walls, and ribosomes different in size and content from those of the Eukaryotes .< ref >

While that national dichotomy has stymied any effort at changing the tradition of the national anthem, " America the Beautiful " continues to be held in high esteem by a large number of Americans.

While comparatively inefficient for low speed use, they are very lightweight and powerful, capable of generating large accelerations and of attaining extremely high speeds with reasonable efficiency.

While bishop he was largely responsible for the construction of a large organ in the cathedral, audible from over a mile ( 1600 m ) away and said to require more than 24 men to operate.

While at large, al-Fihri managed to gather an army allegedly numbering to 20, 000.

While this was OK for Europe, it meant that GSM could not cover large, sparsely populated rural areas of Australia cost effectively.

While hunting they used small watercrafts called Baidarkas and during travel they used their large Baidaras.

While unsustainable imbalances may persist for long periods ( cf, Singapore and New Zealand ’ s surpluses and deficits, respectively ), the distortions likely to be caused by large flows of wealth out of one economy and into another tend to become intolerable.

While these included elite Bersaglieri, Alpini and Cacciatori units, a large proportion of the troops were inexperienced conscripts recently drafted from metropolitan regiments in Italy into newly formed " di formazione " battalions for service in Africa.

While a large trade in both types of diamonds exists, the two markets act in dramatically different ways.

While generally praised for its fast gameplay and unique mechanics, it ultimately failed to gain a very large market presence.

While rocks melted by the impact resemble volcanic rocks, they incorporate unmelted fragments of bedrock, form unusually large and unbroken fields, and have a much more mixed chemical composition than volcanic materials spewed up from within the Earth.

While Constantius was away from the eastern frontier in early 337, Shapur assembled a large army, including war elephants, and launched an attack on Roman territory, laying waste to Mesopotamia and putting Nisibis under siege.

While there is not a large body of academic work examining the relationship, Hironaka's statistical study found a correlation that suggests that every major international anti-secessionist declaration increased the number of ongoing civil wars by + 10 %, or a total + 114 % from 1945 to 1997.

While ethnicity and culture play a large part in Jewish identity, they are not the only way Jews define themselves as Jews.

While Compaq shareholders unanimously approved the deal, there was a public proxy battle within HP as the deal was strongly opposed by numerous large HP shareholders, including the sons of the company founders, Walter Hewlett and David W. Packard, as well as the California Public Employees ’ Retirement System ( Calpers ) and the Ontario Teachers Pension Plan.

While sugar cane dramatically increased Spain's earnings on the island, large numbers of the newly imported slaves fled into the nearly impassable mountain ranges in the island's interior, joining the growing communities of cimarrónes — literally, ' wild animals '.

While most small corporations do not have a 2 / 3 vote requirement, in the exact opposite, most large corporations especially those incorporated in Delaware, do have a 2 / 3 vote requirement.

While encyclopedias in larger languages, having large markets that could support a large editorial staff, churned out new 20-volume works in a few years and new editions with brief intervals, such publication plans often spanned a decade or more in smaller languages.

While this reaction will work at any conductive electrode at a sufficiently large potential, platinum catalyzes both hydrogen and oxygen formation, allowing for relatively mild voltages (~ 2 V depending on the pH ).

While such omissions are inappropriate for managing large projects, they are a common and reasonable occurrence in many very small or simple projects.

While Bannister was well known in the artistic community of his adopted home of Providence, Rhode Island and admired within the wider East Coast art world ( he won a bronze medal for his large oil " Under the Oaks " at the 1876 Philadelphia Centennial ), he was largely forgotten for almost a century for a complexity of reasons, principally connected with racial prejudice.

While in power, the Nazis created social welfare programs to deal with the large numbers of unemployed.

While Menelik's victory was in a large part due to sheer force of numbers, Menelik's careful preparations had made them well-armed numbers.