唠叨
发表于 2025-3-23 10:02:35
Introduction,ons of micro-organisms. Following the work of Brefeld, Lister and Koch, it became possible to study organisms in pure culture, but although this greatly simplified the task of observing and classifying organisms, it meant that they were studied under conditions that were vastly different from those that obtain in natural environments.
Aqueous-Humor
发表于 2025-3-23 16:28:11
Molecular Architecture,e precision of the methods used at the time. Today a large number of extremely sensitive micro-analytical methods are available for studying the chemical composition of micro-organisms, and these methods permit the detection and separation of molecules that are present in microorganisms in very small amounts.
信任
发表于 2025-3-23 19:10:43
Permeation of Solutes,ompounds. Moreover, the osmotic barrier can be broken by treating micro-organisms with lipid solvents, such as aqueous butanol, which cause the release of low molecular weight compounds from organisms. Microscopical observations on plasmolysable micro-organisms also indicate that the osmotic barrier resides in the cytoplasmic membrane.
共同给与
发表于 2025-3-23 23:41:14
Regulation of Metabolism,ntities of compounds that could be used in synthesis of new cell material, which indicates that there is extremely little wastage during cell metabolism. There are many other examples that could be quoted to show the remarkable degree of control and economy that operates in the metabolism of micro-organisms.
–吃
发表于 2025-3-24 05:58:27
-ray spectroscopy study of ,B and ,Cnisms as they occur in natural environments. Knowledge of the chemical activities of micro-organisms has been steadily accumulating ever since the late seventeenth century when Antonie van Leeuwenhoek first observed micro-organisms. The early microbiologists had no option but to study mixed populati
entice
发表于 2025-3-24 08:34:47
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叙述
发表于 2025-3-24 14:05:43
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engrave
发表于 2025-3-24 18:43:50
The Congruence Subgroup Problem,ronment, we can now turn our attention to the central problem in chemical microbiology, namely, how the vast array of small and large molecules which go to make up microbial cell material is synthesized from the raw materials and sources of energy available in the environment.
engender
发表于 2025-3-24 22:10:18
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拖债
发表于 2025-3-25 02:31:48
Controlling crack growth in rockiation which, after extensive absorption and re-emission, is radiated from the surface of the Sun as sunlight. It is from this reservoir of free energy that all living organisms (with the exception of the chemolithotrophic bacteria) directly or indirectly draw in order to exist.