Cellular substance

Zell-kera, n. cell nucleus, -kemteilung, /. Biol.) nudear division, -kdrper, m. cellular body or substance, -masse, /. cellular substance. 

Watteau F, Villemin G, Mansot JL, Ghanbaja J, Toutain F. Localization and characterization by electron energy loss spectroscopy (EELS) of the brown cellular substances of beech roots. Soil Biol Biochem 1996 28 1327-1332. 

If, for example, a waste volume, K of 10,000 gal with a ppm COD of 1500 is processed in t = 20 hr, the equilibrium sludge weight is 270 lb. The calculation is oversimplified and is about 10% too low, assuming, as it does, that endogenous respiration and assimilation occur simultaneously during the entire operation. Actually, there is always a retention time during which cellular substance is consumed without replenishment. 

Wood is a cellular substance chemically composed of roughly 70% holo cellulose. 25% lignin, and 5% water and ethyl alcohol-benzene soluble extractives. These percentages are based on oven-dry wood. 

In more exact determinations it is necessary to subtract from the weight of the insoluble matter that of the mineral matter (sand, etc.), to obtain that of the pure cellular substance. For this purpose the filtration should take place through a dried and tared paper, the weighed insoluble matter being afterwards incinerated and the weight of ash subtracted from that of the total insoluble residue. 

By extraction of Secale cornutum (ergot) with e. g. benzene (1. step extraction of the neutral substances from the slightly acidic cellular substance 2. step extraction of the ammonia alkaline substance). 

A. It reacts with sulfhydryl groups of various cellular substances, including enzymes. 

Ozonolysis of cellular substances, such as uracil and thymine derivatives, is of special interest. Ozonolysis of aqueous solutions of uracils leads to ring cleavage and subsequent ring contraction forming 5-hydroxy-hydantoins (89CL723 90JOC1396) (Scheme 158). 

DNA) which provides the genetic intbrmatioii for the production of prc and other cellular. substances and structures. ... 

Of the cellular substances sugars, amino acids, peptides and macromolecular constituents are able to conjugate. Phenoxy acids form conjugates with the glucose, amino acids and proteins of the cellular substance of plants of higher order. 

The aquated electron undergoes several reactions (see Chapter 5.3.4). It can be transported via water molecules and special cellular substances electron transfer) to other molecules (respectively reactive centers) to achieve reductions (2.48a), but it can also decay into atomic hydrogen and the hydroxyl ion (2.48b). 

The mechanisms of action of the NRs may be classed in an ultrasimplified way into two main categories according to the area of the cell where the initial ligand-receptor association occurs, and the subcellular distribution of NR in the absence of ligand. Small cellular substances such as natural hormones diffuse through the cell membrane and bind to the receptor localized in the cytosol... 

In addition to forming a complex with a particular cellular substance, the thiol may encounter an enzyme that will alter its chemical composition. A change in the structure of the thiol can profoundly alter its distribution within the body. One of the most striking examples of this phenomenon is the accumulation of 6-methyl-thiopurine ribonucleotide- S (6-MMPR) by erythrocytes. The ratio of radioactivity in the erythrocyte as compared to plasma is 40 1, whereas in the case of 6-mercapto-purine- S the ratio is 1 100, representing a 4000-fold difference between... 

Further studies showed that the caraway seed enzyme lost the methanethiol-depleting activity following acetone precipitation, but reconsititution of the acetone precipitate with the soluble caraway seed cellular substances reinstated the methanethiol-depleting activity. Thus, it appeared that a cofactor or a second substrate was required by the enzyme to function in removal of methanethiol. 

The cellular substance, the gel-like fluid that exists between the nucleus of a cell and the cellular membrane and contains all cellular organelles, is... 

An alkaloid is a substance with nitrogen in the molecule, connected to at least two carbon atoms. The molecule must have at least one ring, but it is not necessarily heterocyclic. The compound cannot be a structural unit of macro-molecular cellular substances and cannot serve as a vitamin or hormone. 

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