Publication

Proposals for a standardized sample handling procedure for the determination of elemental composition and enthalpy of combustion of biological material

Urs von Stockar, Ian William Marison
1990
Journal Articles

Abstract

A procedure has been developed for the prepn. of microbial biomass of std., defined quality suitable for the detn. of elemental compn. and enthalpy of combustion. Furthermore methods for the detn. of residual moisture and ash content of biomass samples have been established. The results indicate that samples should be prepd. in a freeze-dried (lyophilized) state and that residual moisture content should be detd. immediately prior to sample prepn. for combustion calorimetry and elemental anal. Results from such anal. should then be related to material which is first freeze-dried and subsequently oven dried (100 Deg for 24 h) as ref. state. The method outlined here for microbial biomass should prove suitable for biol. samples from a wide variety of sources including both pure proteins, fats, etc. as well as cells and tissues. [on SciFinder (R)]

Official source

https://infoscience.epfl.ch/entities/publication/7e0353d7-3cf8-4c5e-8b5c-c6f3926e61f5

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Urs von Stockar, Ian William Marison
1990
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/7e0353d7-3cf8-4c5e-8b5c-c6f3926e61f5

About this result

Related concepts (31)

Microbial loop

The microbial loop describes a trophic pathway where, in aquatic systems, dissolved organic carbon (DOC) is returned to higher trophic levels via its incorporation into bacterial biomass, and then coupled with the classic food chain formed by phytoplankton-zooplankton-nekton. In soil systems, the microbial loop refers to soil carbon. The term microbial loop was coined by Farooq Azam, Tom Fenchel et al. in 1983 to include the role played by bacteria in the carbon and nutrient cycles of the marine environment.

Calorimeter

A calorimeter is an object used for calorimetry, or the process of measuring the heat of chemical reactions or physical changes as well as heat capacity. Differential scanning calorimeters, isothermal micro calorimeters, titration calorimeters and accelerated rate calorimeters are among the most common types. A simple calorimeter just consists of a thermometer attached to a metal container full of water suspended above a combustion chamber. It is one of the measurement devices used in the study of thermodynamics, chemistry, and biochemistry.

Desiccant

A desiccant is a hygroscopic substance that is used to induce or sustain a state of dryness (desiccation) in its vicinity; it is the opposite of a humectant. Commonly encountered pre-packaged desiccants are solids that absorb water. Desiccants for specialized purposes may be in forms other than solid, and may work through other principles, such as chemical bonding of water molecules. They are commonly encountered in foods to retain crispness. Industrially, desiccants are widely used to control the level of water in gas streams.