Although magnesium and manganese are produced by weathering, exchanges between soil organic matter and living cells account for a significant portion of ecosystem fluxes.

Although early examples of organic reactions and applications were often serendipitous, the latter half of the 19th century witnessed highly systematic studies of organic compounds.

Although the press kit released to the media for the film explicitly defined a replicant as, " A genetically engineered creature composed entirely of organic substance ", a question commonly posed is the physical make-up of the replicants themselves.

Although the visible buildings give an impression of an organic whole, it is certain that an unknown quantity of additional structures had already been lost to sea erosion before the site's rediscovery and subsequent protection by a seawall.

Although undeniably a cornerstone of organic chemistry, Hückel's concepts were undeservedly unrecognized for two decades.

Although less research has been done in poultry, organic acids have also been found to be effective in poultry production.

Although organic farming is prehistoric in the widest sense, Sir Albert Howard is widely considered to be the " father of organic farming " in the sense that he was a key founder of the post-industrial-revolution organic movement.

Although pyrethrum ( natural pyrethrins ) is more effective against insects when used with piperonyl butoxide ( which retards degradation of the pyrethrins ), organic standards generally do not permit use of the latter substance.

Although opposition to the use of any transgenic technologies in organic farming is strong, agricultural researchers Luis Herrera-Estrella and Ariel Alvarez-Morales continue to advocate integration of transgenic technologies into organic farming as the optimal means to sustainable agriculture, particularly in the developing world.

Although GMOs are excluded from organic farming, there is concern that the pollen from genetically modified crops is increasingly penetrating organic and heirloom seed stocks, making it difficult, if not impossible, to keep these genomes from entering the organic food supply.

Although the term is almost always applied to organic compounds, acyl groups can in principle be derived from other types of acids such as sulfonic acids, phosphonic acids.

Although the windrow has no physical barriers to prevent worms from escaping, in theory they should not due to an abundance of organic matter for them to feed on.

Although research is ongoing on this topic, conclusions that support the usefulness of spinal manipulation for organic disorders remains to be seen.

Although Steno's ideas about fossilization were well known and much debated among natural philosophers, an organic origin for all fossils would not be accepted by all naturalists until the end of the 18th century due to philosophical and theological debate about issues such as the age of the earth and extinction.

Although stressing that he was not primarily a healer but one who taught others to heal themselves, Coué claimed to have effected organic changes through autosuggestion.

Although organic peroxides and hydroperoxides are used in emulsion polymerization, initiators are usually water soluble and partition into the water phase.

Although the term was originally coined by Geoffrey Rudd as a contraction of vegetable organic in order to " denote a clear distinction between conventional chemical based systems and organic ones based on animal manures ".

Although metabolites of urea are nitrogen fertilizers, it is easy to over-fertilize with urine, or to utilize urine containing pharmaceutical ( or other ) content, creating too much ammonia for plants to absorb, acidic conditions, or other phytotoxicity.

Although he questions the extent and nature of the alleged revival of religion and the alleged increase in conformity, and thinks that `` hedonistic '' present-time orientation does not have the meaning usually attributed to it, he does conclude that Americans increasingly enjoy leisure without guilt, do not stress achievement so much as formerly, are more accepting of group harmony as a goal, more tolerant of diversity and aware of other cultures.

Although Romans who had been adopted into a new family usually retained their old nomen in cognomen form ( e. g. Octavianus for one who had been an Octavius, Aemilianus for one who had been an Aemilius, etc.

Although works of precious gems and metals usually do not survive the ravages of time, some fine pieces of Assyrian jewelry were found in royal tombs at Nimrud.

Although variations of the blood supply to the adrenal glands ( and indeed the kidneys themselves ) are common, there are usually three arteries that supply each adrenal gland:

Although players usually use their sticks to move the ball around, they may use any part of their bodies other than their heads, hands or arms and may use their skates in a limited manner.

Although nude men were depicted standing upright, most depictions of female nudity in Greek art occurred " usually with drapery near at hand and with a forward-bending, self-protecting posture ".

Although not always seen, her mourning call is heard, usually at night when someone is about to die and usually around woods.

Although Douglas was always second billed under Lancaster in these films, their roles were usually more or less the same size with the exceptions of I Walk Alone, in which Douglas played a villain, and in Seven Days in May, where Douglas ' part was larger than Lancaster's but not as dramatic.

Although these two are often considered interchangeable, compilers and execution environments usually assign different signals to these.

Although he is usually credited with coining the phrase, he always insisted that it was suggested to him by somebody else.

Although cadmium usually has an oxidation state of + 2, it also exists in the + 1 state.

Although organizational communication, as a field of study, is usually geared toward companies and business groups, these may also be seen as communities.

Although the best treatment for comatose patients remains unknown, hospitals usually place comatose patients in an Intensive Care Unit ( ICU ) immediately.

Although one of his brothers became a clergyman and one of his sisters a missionary, Attlee himself is usually regarded as an agnostic.

Although all group 16 elements of the periodic table, including oxygen, are defined as chalcogens, oxygen and oxides are usually distinguished from chalcogens and chalcogenides.

Although it is usually translated as " element ", the Chinese word xing literally means something like " changing states of being ", " permutations " or " metamorphoses of being ".

( Although mutual orthogonality is the only condition, these vectors are usually constructed for ease of decoding, for example columns or rows from Walsh matrices.

Although production was usually about 57, 000 – 59, 000 tons annually in the 1980s, the acreage harvested declined from in the early 1980s to in 1999, indicating a greater yield per acre.

Although The Moonstone is usually seen as the first detective novel, a number of critics suggest that the lesser known Notting Hill Mystery ( 1862 – 63 ), written by the pseudonymous " Charles Felix ", preceded it by a number of years and first used techniques that would come to define the genre.

Although Tacitus is usually considered to be the most reliable author of this era, his views on Domitian are complicated by the fact that his father-in-law, Gnaeus Julius Agricola, may have been a personal enemy of the Emperor.

Although not usually stated in polynomial form, this example is equivalent to the polynomial equation 4xyz = yzn + xzn + xyn = n ( yz + xz + xy ).</ td >

Although usually trivalent, europium readily forms divalent compounds.

Although sunlight is free and abundant, solar electricity is still usually more expensive to produce than large-scale mechanically generated power due to the cost of the panels.

Although ephemeris time was defined in principle by the orbital motion of the Earth around the Sun, it was usually measured in practice by the orbital motion of the Moon around the Earth.