However, since it is capable of being greatly altered and even discharged by heat, the color was believed by some authorities to be from an organic source.

However, the intact forest floor, with its layers of leaf litter and organic matter, is still able to absorb the impact of the rainfall.

However, he maintained that a certain ' materia pinguis ' or ' fatty matter ,' set into fermentation by heat, gave birth to fossil organic shapes, as opposed to fossil shells having belonged to living animals.

However certain rocks ( such as lapis lazuli ) and organic materials ( such as amber or jet ) are not minerals, but are still used for jewelry, and are therefore often considered to be gemstones as well.

However, most are not hydroponics because the soilless medium often provides some of the mineral nutrients via slow release fertilizers, cation exchange, and decomposition of the organic medium itself.

However, in quantum physics, organic chemistry, and biochemistry, the term molecule is often used less strictly, also being applied to polyatomic ions.

However, the loss of soil depth and organic matter takes centuries to correct.

However, radiocarbon dating can often be used on the inks that make up the writing, since many of them contain organic compounds such as plant leachings, soot, and wine.

However, not all organisms that use light as a source of energy carry out photosynthesis, since photoheterotrophs use organic compounds, rather than carbon dioxide, as a source of carbon.

However, the disadvantage this implies in relation to their contestant parties ( which denote permanent labor and a disciplined and organic structure ), impels them to modify their organization to become mass-based parties.

However, Toxorhynchites can consume all types of prey, organic debris ,, or even exhibit cannibalistic behavior.

However, in the Earth's stratosphere, fluorine atoms react rapidly with water and methane to form strongly bound HF, while organic molecules which contain iodine react so rapidly in the lower atmosphere that they do not reach the stratosphere in significant quantities.

However, " organic strategies " may result in a tangle of elements and subsystems, developed in isolation and subject to local optimization as opposed to meeting a global purpose.

However, most scholarly research suggests a more gradual and organic development of the rosary.

However, new light-manufacturing centered around organic and high-end food have sprung up in the old plant.

However, if Thread survives to begin its feeding cycle on the organic component of soil, the result is a burrow that multiplies extremely rapidly.

However it is unknown if cold flames occur naturally, though a lot of compounds which exhibit cold flames are the natural byproducts of organic decay.

However, there is a growing resurgence of interest in organic, free range, and locally grown family farm products.

However, in 1845, Adolph Kolbe succeeded in making acetic acid from inorganic compounds, and in the 1850s, Marcellin Berthelot repeated this feat for numerous organic compounds.

However, briquette makers can now turn organic waste into fuel, saving money and / or collection time, and preserving forests.

However, in fermented milk products, such as yogurt, the presence of organic acids may counteract the insulinotropic effect of milk in mixed meals.

However a final effluent of a sewage treatment works serving a large industrialised area might have a discharge where the ultimate BOD was much greater than the 5 day BOD because much of the easily degraded material would have been removed in the sewage treatment process and many industrial processes discharge difficult to degrade organic molecules.

However, the use of septic tanks and other On-Site Sewage Facilities ( OSSF ) is widespread in rural areas, serving up to one quarter of the homes in the U. S. The most important aerobic treatment system is the activated sludge process, based on the maintenance and recirculation of a complex biomass composed by micro-organisms able to absorb and adsorb the organic matter carried in the wastewater.

" However, the Daleks are actually organic life-forms that were encased in robotic shells, and thus do not possess the purported positronic brain and, in any case, do not obey the Three Laws of Robotics.

However, this definition only works well for substances that are composed of molecules, which is not true of many substances ( see below ).

However, not all substances or chemical compounds consist of discrete molecules, and indeed most of the solid substances that makes up the solid crust, mantle, and core of the Earth are chemical compounds without molecules.

However this approach has none of the physical pictures of the valence bond and molecular orbital theories and is difficult to extend to larger molecules.

However, the work of Friedrich Hund, Robert Mulliken, and Gerhard Herzberg showed that molecular orbital theory provided a more appropriate description of the spectroscopic, ionization and magnetic properties of molecules.

However, once the applied electric field approaches the breakdown value, free electrons become sufficiently accelerated by the electric field to create additional free electrons by colliding, and ionizing, neutral gas atoms or molecules in a process called avalanche breakdown.

However, molecules that are larger than the average pore size of the packing are excluded and thus suffer essentially no retention ; such species are the first to be eluted.

However, because of the role of the citric acid cycle in anabolism, they may not be lost, since many TCA cycle intermediates are also used as precursors for the biosynthesis of other molecules.

However, the arrangement of atom or molecules in most crystalline materials is not perfect.

However, the higher the temperature, the less chance that the ends to be joined will be aligned to allow ligation ( molecules move around the solution more at higher temperatures ).

However, other evidence was interpreted as suggesting that DNA was structurally uninteresting and possibly just a molecular scaffold for the apparently more interesting protein molecules.

However, models that suggest molecular rearrangement, reorganization, and pre-complexing of effector molecules are beginning to be accepted.

However, according to quantum physics, individual molecules ( and atoms, electrons, protons etc.

However, it is now well-established that some introns themselves encode specific proteins or can be further processed after splicing to generate noncoding RNA molecules.

However, a similar " sexual " process, known as bacterial transformation, involves transfer of DNA from one bacterium to another and recombination of these DNA molecules of different parental origin.

However, the majority of familiar solid substances on Earth, including most of the minerals that make up the crust, mantle, and core of the Earth, contain many chemical bonds, but are not made of identifiable molecules.

However different isomers can have the same atomic composition while being different molecules.

However, on a minority basis, many other radiotracers are used in PET to image the tissue concentration of many other types of molecules of interest.

However, since photosystem II includes the first steps of the Z-scheme, an external source of electrons is required to reduce its oxidized chlorophyll a molecules.

However, it is sometimes desirable to sequence RNA molecules.

However, the entire spectrum of ultraviolet radiation has some of the biological features of ionizing radiation, in doing far more damage to many molecules in biological systems than is accounted for by simple heating effects ( an example is sunburn ).

However, particularly in attempting to calculate the properties of excited states ( molecules that have been excited by some source of energy ), the VB method does not always work well.

However, being about 40 % weaker than C-C and C-H bonds, the disulfide bond is often the " weak link " in many molecules.