Abstract The temperature of maximum pyrolysis yield (known as Tmax) can be used to determine the level thermal alteration in sedimentary organic matter; higher Tmax values represent alteration. is commonly measured on petroleum source rocks or similar sediments with high carbon contents. It would desirable measure volcanic because they have complex patterns However, often low total contents and...

The spectral and spatial properties of the advanced spaceborne thermal emission and reflection radiometer (ASTER) data can be used in detailed lithological and hydrothermal alteration mapping related to copper and gold mineralization, particularly the shortwave infrared radiation subsystem where hydrothermal alteration minerals have diagnostic spectral absorption features. This paper reviews th...

Electroporation is the application of electric pulses of sufficient amplitude to target tissue, which entails not only permeabilization of cell membranes, but also heat generation and dissipation. Noticeable rises in temperature have been observed in a number of electroporation applications. These temperature rises are a potential source of alteration of thermodynamic properties of tissue where...

Alteration of fresh rock surfaces proceeds very rapidly in most terrestrial environments so that initial stages of modification of newly exposed surfaces are quickly masked by subsequent aqueous weathering processes. The hyper-arid and hypothermal environment of Beacon Valley, Antarctica, is limited in terms of available liquid water and energy available for alteration, which severely slows wea...

Mango nectar is a commercially familiar and preferred product. The traditional processing of mango nectar has been by thermal processing which resulted in the alteration of the flavour of the product due to the effect of high temperature. The thermal processing of the nectar also resulted in the production of byproducts of non-enzymatic browning such as 5hydroxy methyl furfural (HMF). These pro...

The advantages of the maize Adh system for low level mutagenesis studies are discussed. They include high mutation rate and the availability of both a strong selection system for null mutants and a sensitive method for detection of variants. The null selection involves treatment of pollen with allyl alcohol which is converted by the Adh enzyme to the toxic acrylaldehyde. Adh variants can be det...

A metal-organic framework (MOF) for reversible alteration of guest molecule adsorption, here carbon dioxide, upon photochemical or thermal treatment has been discovered. An azobenzene functional group, which can switch its conformation upon light irradiation or heat treatment, has been introduced to the organic linker of a MOF. The resulting MOF adsorbs different amount of CO(2) after UV or hea...