Industry data not covered by the shuttle returns, such as the wood-wool cement plants, timber preservation plants, pencil factories, wood-chips manufacturers, match factories are monitored through periodic surveys, using questionnaires or direct interviews.
At a former wood preservation plant severely contaminated with coal tar oil, in situ bulk attenuation and biodegradation rate constants for several monoaromatic (BTEX) and polyaromatic hydrocarbons (PAH) were determined using (1) classical first order decay models, (2) Michaelis Menten degradation kinetics (MM), and (3) stable carbon isotopes, for o-xylene and naphthalene.
Water preservation in plants treated with DEB was corroborated by higher relative water content than control plants at the end of the drought period.
A historical treatment of forensic ecology is included as well as methods for collection and preservation of plants.
Conditions at the site are unusually favourable for the preservation of plant materials.
There, the preservation of plant remains is remarkably good, and from these it is evident that shortly after 6500 bce the inhabitants of the valley were selecting and planting seeds of chili peppers, cotton, and one kind of squash.
Until the early 1960s, mercuric chloride was used in the United States for the preservation of plant specimens in herbarium collections.
Santa Elina rock shelter, in Central Brazil, is renowned for its astounding rock art, rare preservation of plant remains, and long-lasting occupation.
The preservation and planting of hedgerows around agricultural fields can reduce NO3− flux, but the efficacy of hedgerows depends on the amount of NO3− in soil and groundwater, hydrological flowpath and timing, and biogeochemical conditions surrounding and below roots.
The ground water is the most important factor which determines not only the type of vegetation but also controls the redox potential (oxic to anoxic) and thereby the mode of preservation of plant litter or intensity of humification process.
Species diversity recorded in the rock record throughout the studied interval mainly was controlled by climatically-driven potential for preservation of plant material, which was highest in poorly drained/waterlogged habitats (wetlands, lakes) concentrated in basinal lowlands and representing major windows of preservation.
