Effect of dehydration

Fish which is frozen in air blast will often be dipped into clean water afterwards, resulting in a layer of ice on the surface. This glazing process protects the fish from the effects of dehydration in subsequent storage. 

McKenzie, B.D. Stinson, R.H. (1980). Effect of dehydration on leakage and membrane structure in Lotus corniculatus L. seeds. Plant Physiology, 66, 316-21. 

Kaiser, W.M., Schroppel-Meier, G. Wirth, E. (1986). Enzyme activities in an artificial stroma medium An experimental model for studying effects of dehydration on photosynthesis. Planta, 167, 292-9. 

Kaur, B. and Manjerkar, S.P., Effect of dehydration on the stability of chlorophyll and P-carotene content of green leafy vegetables available in northern India, J. Food Sci. TechnoL (India), 12, 321, 1975. 

Gomez, M.I., Carotene content of some green leafy vegetables of Kenya and effects of dehydration and storage on carotene retention, J. Plant Foods, 3, 231, 1981. 

Thomas J et al (2004) The effect of dehydration history on PVA/PVP hydrogels for nucleus pulposus replacement. J Biomed Mater Res B Appl Biomater 69(2) 135—140... 

The effect of dehydrating the digested waste using solar energy is investigated with respect to the stability of the ammonia compounds and the reduction of odour with the aim of producing an agriculturally valuable product. 

The second part of the study aimed to assess the effect of dehydration on the anaerobically digested and chemically treated anaerobically digested wastes. 

In order for a solvent extraction system to be of value, it must be able to separate the phase containing the pollutant from the water. While the polymers can be used to extract contaminants from air, their water solubility precludes separation from groundwater. In the biphasic technique, the separation of the polymer phase from the water is achieved by the well-known physical chemical effect known as salting out. Simply put, inorganic salts are added to the system. The addition has the effect of dehydrating the polyol, making it insoluble and permitting separation. 

Table IX shows the effect of dehydration by chemical means. Silica samples were calcined at 870°C in various gases, impregnated anhydrously with 0.5% Cr, and finally calcined in air at 650°C, producing Cr(VI). Only the silica (not the chromium) was exposed to the reducing treatment. Even so, CO more than doubled the melt index potential and COS improved it by a factor of 60. Activity was also increased.

Fig. 23. Effect of dehydration temperature on the MBssbauer spectrum of Fe2+-M. (a) 15 Torr of H20, 273 K. (b) evacuated 24 hr, 273 K (c) evacuated 3 hr, 517 K (d) evacuated 8 hr, 800 K (e) 15 Torr of H20, 273 K. All spectra at room temperature and on the same sample. Zero velocity is with respect to a 57Co in chromium source. Figure according to Garten et cd.

Although Wells (Ref 2) recommends TEB as a jet motor fuel for high speed aircraft, he cautions that TEB is. . extremely destructive to living tissue and on contact with the skin produce(s) a combined effect of dehydration and thermal bum. The reaction is immediate and deep bums with subsequent scarring result.. 

Surface basicity can also be examined by indicator dyes, but there has beef much less study of surface basicity than of surface acidity. Phenolphthalein, bromothymol blue and various nitro-analines have been used to assess the effect of dehydration on the basicity of alkaline earth oxides or hydroxides, using benzoic... 

The movement of Na+ and glucose from the lumen of the intestine across the epithelial cell to the blood sets up a difference in osmotic pressure across the cell. As a result, water flows through the cell, across the apical and basolateral membranes by simple diffusion. Hence the uptake of water requires both Na+ and glucose (or amino acids) to be present in the lumen of the intestine. The presence of water alone in the lumen of the intestine is much less effective. This is the basis of glucose rehydration therapy as a remedy for dehydration a solution of glucose and salt (NaCl) is administered to the patient. This is a simple, inexpensive but extremely important treatment which has saved the lives of many infants in developing countries who would have otherwise died of the effects of dehydration, usually associated with diarrhea. 

Of 56 patients with lithium toxicity, 42 had initially overdosed and they were compared with those who had toxicity that was described as inadvertent and associated with volume depletion (545). The initial lithium concentration was lower in the cases of intentional overdose than in the cases of inadvertent intoxication (2.4 mmol/l versus 3.4 mmol/l). Hemodialysis for lithium toxicity was required in 9% of those who had taken an intentional overdose compared with 50% of those who had inadvertent intoxication. These findings were in contrast to the amount of lithium taken during the 24 hours before hospitalization, which was much higher in those who had taken an intentional overdose, because of the large inhibitory effect of dehydration on lithium excretion. 

Kachalova et al. (1987) measured the effect of dehydration on the diffraction of three crystal forms of lysozyme, at 3 or 6 A resolution. The lowest relative humidity studied was 0.4. The molecules as a whole were displaced on dehydration by 1.9-5.2 A, through rotation and translation of the units. There was also displacement of the two domains of lysozyme relative to one another. The domain displacements of 1.4-... 

Ishibashi, K., Sasaki, S., Fushimi, K., Yamamoto, T., Kuwahara, M., and Marumo, F. (1997). Immunolocalization and effect of dehydration on AQP3, a basolateral water charmel of kidney collecting ducts. Am.. Physiol. 272, F235-F241. 

Lerit CF, Zuurman K, Kussendrager K. Effect of dehydration on the binding capacity of particulate hydrates. J Pharm Pharmacol 1984 36 399. 

Effect of Dehydration and Osmotic Stress on the Symmetric and Asymmetric Vibration Modes of Phosphate Groups of Phosphatidylcholines... 

Fay T. The therapeutic effect of dehydration on epileptic patients. Arch Neurol and Psychiatry 1930 23 920-945. 

Figure 2(C). Simulated effect of dehydration rate on the leaching of aldicarb residues under Florida Ridge conditions.

In view of the importance of solvent for protein folding, the absence of an effect of dehydration on conformation is surprising. It is possible that the stability of the native conformation at reduced water content has a kinetic basis, owing to conformation changes being inhibited. 

---