While about 32 of the chemical elements occur on Earth in native uncombined form, most of these occur as mixtures.

While its results normally complement the information obtained by chemical experiments, it can in some cases predict hitherto unobserved chemical phenomena.

While the predominance of unit operations in chemical engineering courses in Britain and the United States continued until the 1960s, transport phenomena started to experience greater focus.

While the overall structure of archaeal pseudopeptidoglycan superficially resembles that of bacterial peptidoglycan, there are a number of significant chemical differences.

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 Proust believed that chemical compounds are composed of a fixed ratio of their constituent elements irrespective of the methods of production, Berthollet believed that this ratio can change according to the ratio of the reactants initially taken.

While DDT's chemical and insecticidal properties were important factors in these victories, advances in application equipment coupled with a high degree of organization and sufficient manpower were also crucial to the success of these programs.

While sojourning at Cassel, Wöhler made, among other chemical discoveries, one for obtaining the metal nickel in a state of purity, and with two friends he founded a factory there for the preparation of the metal.

While typical chemical reactions release energies on the order of a few eVs ( e. g. the binding energy of the electron to hydrogen is 13. 6 eV ), nuclear fission reactions typically release energies on the order of hundreds of millions of eVs.

While chemical synapses are found between both excitatory and inhibitory neurons, electrical synapses are most commonly found between smaller local inhibitory neurons.

While packing his luggage, he is knocked out by a chemical agent in his quarters.

While in general chemical elements can be purified through chemical processes, isotopes of the same element have nearly identical chemical properties, which makes this type of separation impractical, except for separation of deuterium.

While rather small in comparison to chemical thrusters, the radiation pressure force is inexorable and requires no fuel mass.

While 2, 4, 5-T itself is of only moderate toxicity, the manufacturing process for 2, 4, 5-T contaminates this chemical with trace amounts of 2, 3, 7, 8-tetrachlorodibenzo-p-dioxin ( TCDD ).

While studies are conducted on all psychoactive drugs by both fields, psychopharmacology focuses on psychoactive and chemical interactions within the brain.

While much smaller in volume than other chemical sectors, their products tend to have very high prices — over ten dollars per pound — growth rates of 1. 5 to 6 times GDP, and research and development spending at 15 to 25 percent of sales.

While the bell pepper is a member of the Capsicum genus, it is the only Capsicum apart from Capsicum rhomboideum that does not produce capsaicin, a lipophilic chemical that can cause a strong burning sensation when it comes in contact with mucous membranes.

While in France, during a training exercise he was accidentally gassed and subsequently developed tuberculosis, which more easily infects lungs that have been damaged by chemical gases.

While Friday and others investigate bloodstains in a suburban backyard, the listener hears a series of overlapping effects: a squeaking gate hinge, footsteps, a technician scraping blood into a paper envelope, the glassy chime of chemical vials, bird calls, and a dog barking in the distance.

The report stated that, " While agents degrade over time, chemical warfare agents remain hazardous and potentially lethal.

While PEG and PEO with different molecular weights find use in different applications, and have different physical properties ( e. g. viscosity ) due to chain length effects, their chemical properties are nearly identical.

While suitable media and raw pigments are available for the individual production of acrylic paint, due to the fast drying time and other technical issues, hand mixing may not be practical.

While these and other ancient Near Eastern texts consider comparable issues, scholars have not found their direct antecedent.

While music and the approach to missionary work were the most visible issues, there were also some deeper ones.

While philosophers have generally considered the human mind to include broad faculties, such as reason and lust, evolutionary psychologists describe evolved psychological mechanisms as narrowly focused to deal with specific issues, such as catching cheaters or choosing mates.

While subject to criticism at home and abroad on issues of protection, enforcement, over-regulation, and imposition of externalities, the country remains an important source of environmental legal expertise and experience.

While this event has no practical effect, the sautier issues a formal press release and the local newspaper will usually mention the news.

While the Peelites agreed with the Whigs on issues dealing with the international trade, there were other issues which the Peelites disagreed with the Whigs.

While living in Pittsburgh, PA, he advised the citizenry on various issues including the use of public funds to build stadiums and the method of raising tax revenue.

While the classic bosal-style hackamore is usually used to start young horses, other designs, such as various bitless bridles and the mechanical hackamore are often seen on mature horses with dental issues that make bit use painful, horses with certain training problems, and on horses with mouth or tongue injuries.

While the North American and European regions are technically independent of each other, today many issues within EFnet are handled at a global level.

While these two causes have not been proven they ’ re likely suspects as they cause issues with both the blood flow and nervous systems.

While Clinton could steer a middle ground between his Democratic supporters and the Republican Congress on monetary issues, Reno's job was at the center of a variety of intractable cultural conflicts.

While groups try to promote lesbian issues and concerns, they also face misogynistic attitudes from gay men and homophobic views from heterosexual women.

While, theoretically relying on Michel Foucault ’ s theory of discipline and governmentality, as well as related insights in the social control literature, this paper examines Project Carnivore relative to the larger context of state rationality and related privacy issues.

While state courts must follow decisions of the United States Supreme Court on issues of federal law, federal courts must follow decisions of the courts of each state on issues of that state's law.

While the Liberal Party pulled out of the government in February 2000, the Gonzalez Macchi government has achieved a consensus among the parties on many controversial issues, including economic reform.

While factorially distinct from Eysenck's previous R factor, the S-factor did positively correlate with the R-factor, indicating that a basic left – right or right – left tendency underlies both social values and economic values, although S tapped more into items discussing economic inequality and big business, while R relates more to the treatment of criminals, and to sexual issues and military issues.

While addressing the officers and cadets at the Naval War College, general Karamat stressed the creation of National Security Council which would be backed by a " team of civil-military experts " for devising policies to seek resolution ongoing problems relating the civil-military issues ; also recommended a " neutral but competent bureaucracy and administration of at federal level and the establishment of Local governments in four provinces.

While much theatre of the time tackled serious social and political issues, Earnest is superficially about nothing at all.

While the Representatives existed in a two-year direct election cycle, the senators could afford to "... take a more detached view of issues coming before Congress.

While the Assembly was in suspension, due to issues involving the main parties and the Provisional Irish Republican Army ( IRA ), its legislative powers were exercised by the UK government, which effectively had power to legislate by decree.