Oxygen entries

Poultry, susceptible to microbiological deterioration, is an excellent substrate for Salmonella. Therefore, the temperature is reduced as rapidly as possible after slaughter. Packagiag at factory level is in soft film, ie, low density polyethylene or plastici2ed PVC, which retards water-vapor loss and permits oxygen entry. 

Figure 6. Partly assembled, 5-gallon, low density polyethylene liner in a corrugated carton. Liner is coated with poly(vinylidene chloride) (Saran) to block oxygen entry and prevent loss of aroma used for cola concentrate.

See also Oxygen entries 02 sensor, OBD-II, 10 58 02 tension, nitrogen fixation regulation and, 17 310. See also Oxygen entries 03. See Ozone entries O-acylation, 9 282 Oakmoss, in perfumes, 18 369 Oak Ridge electromagnetic separation plant, 25 415-416... 

The mechanism of the cobalt-catalyzed hydrofunctionalizations can be rationalized as follows. Common to all protocols is the generation of a cobalt(III) hydride complex 365C from a cobalt(II) precursor 365 (Fig. 84). A major difference lies in the generation of 365C. In the presence of oxygen (entries 1-14), the reaction starts most likely by oxidation of 365 to Co(III) peroxide complexes 365A... 

J. B. Wittenberg. Myoglobin-facilitated oxygen diffusion role of myoglobin in oxygen entry into muscle. Physiol. Rev., 50 559-636, 1970. 

The most recent crystallographic study discloses the structure of the methylamine oxidase from the yeast Hansenula polymorpha [31], which shows an integrated network of water molecules providing electron transfer from topa quinone to copper and other important features such as the channel for oxygen entry and hydrogen peroxide release. The role of the active site aspartate base (Asp319) in the aminotransferase mechanism of the copper amine oxidase from H. polymorpha has been probed by site-directed mutagenesis [141]. It has been demonstrated by several... 

Table 9.9. Oxygen entry rate (k ), exit rate (k ) and migration rate (x) determined on - ...

Oxygen entry into the plant varies with plant species. For many wetland plants, oxygen entry into the plant occurs through... 

Oxygen is not found in oil reservoirs, and precautions are taken to prevent oxygen entry into the production environment however, in many cases a few parts per million of oxygen enter the pipeline and enhance corrosion problems. 

Entries 1-22 list exo phosphines 200 whereas entries 23-30 are endo phosphines 203 (Scheme 2.62). The number of endo phosphines prepared to date is more limited, probably due to the low stereoselectivity in their formation. Entries 1-10 include exo monophosphines with additional oxygen (entries 1-6), sulfur (entries 3, 5-8) and nitrogen (entries 9 and 10) donor atoms. Entries 11-22 contain a second phosphorus or an arsenic atom, which in some cases is also stereogenic (entries 14-16 and 19 21). The compound in entry 19 is the dimerisation of DMPP, which required the use of a platinum complex. ... 

Except in the case of oxygen, entry of material into the body occurs by absorption across the intestinal epithelium which is subjected to a constantly changing chemical environment. Apart from the great variety of natural food constituents it may also be exposed to a tremendous range of synthetic compounds devised by food scientists and pharmaceutical chemists. It is not surprising, therefore, to find that the life of an intestinal epithelial cell is extremely short and that the whole of the intestinal lining is replaced in rather less than 2 days. 

Solids discharge in the underflow slurry is performed in either an open or a closed system. With the open system, the slurry is rejected through an adjustable orifice at the apex of the cone to an open trough. The orifice can be adjusted to regulate the flow rate of the water leaving with the solids. The open system can allow oxygen entry into the system. 

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