Grinding effect

It can be seen from Fig. 35(c) that MRR increases continuously with the solid concentration, which is consentaneous with the former results [41,106]. This may be due to the stronger mechanical grinding effect at the high particle concentration at which particles impact and grind the surfaces. 

Prior to conducting the sorption experiment, the coal extract (200 mg) was first placed in a Wig-L-Bug capsule and ground for 1 minute under nitrogen. This grinding effectively reduces the extract to a fine powder, which is then used for the sorption experiment. Approximately 50-70 mg of the extract was then placed on the sample pan and the hangdown tube was replaced. The sample was maintained at 30.00 0.02 C by means of a constant temperature bath which surrounded the hangdown tube. 

Lin, S. Y., Kao, Y. H., and Yong, J. C. 1988. Grinding effect on some pharmaceutical properties of drugs by addingP-cyclodextrin.Drug Develop. Ind. Pharm14 99-118. 

G. T. Greco, III. Segregation of active constituents from tablet formulations during grinding effects on coated tablet formulations, Drug Dev. Ind. Pharm., 11 1889 (1985). 

Corrosion of automobiles is well documented (49-51). Environmental factors such as the deicing salts on the roads and temperature fluctuations have profound effects on automobiles. The cars are expected to survive the grinding effect of gravel, offer comfortable proteetion to the passengers, should be easily and economically repairable on damage with a reasonable service life. 

As has been determined experimentally, the most favourable grinding effect is obtained in the range between 68 and 75% of the critical speed. Tube mills are normally operated within these limits. As a rule, the various manufacturers have adopted certain speed ranges as most suitable for their mills. 

The effect of grinding time on the RDClor in the absence or presence of P-CD or HP-P-CD is displayed in Fig. 3. Obviously, the crystallinity of LOR was reduced with the increase of grinding time. In addition, the HP-P-CD seems to be faster than that of the P-CD causing the reduction in crystallinity of LOR. The excess amoimt of HP-P-CD might improve the grinding effect than that of the p CD used although there was the same molar ratio. Fig. 3 also demonstrates the apparent zero-order kinetics for the reduction in crystallinity of LOR in the presence of P-CD or HP-P-CD with grinding time. 

Pasch and co workers [45] hyphenated TREF fractionation with SEC-FTIR to measure the compositional heterogeneity within a commercial impact PP copolymer and demonstrated successfully that the combination of TREF and SEC-FTIR provides a simple alternative to more time-consuming conventional ways of characterizing impact PP copolymers of complex heterogeneity. Hasan et al. [46] correlated the TREF, C NMR and SEC results of PP produced by different Ziegler-Natta catalysts in terms of catalyst preparation method, polymerization conditions, type of co-catalyst, and evaluated the performance of the catalyst with respect to several aspects including the grinding effect on the surface catalyst performance, etc. Their results show that the polymerization activity, isospecificity and the isospecificity distribution of active sites of TiCls catalysts are mainly... 

These automatic alternatives do not always respect quality criteria. In fact, fermented skins are more sensitive to the shredding and sometimes grinding effect of mechanical solutions than fi esh grape crops. As a result, suspended solids... 

Figures 3.27 and 3.28 show that the as-rolled sheet had a high corrosion rate attributed to the Fe-containing particles in the surface from the rolling process. Heat treatment led to a slight increase in corrosion rate. Sandblasting led to a further increase in corrosion rate consistent with Fe-particle pick-up during sandblasting. Both acid cleaning and grinding effectively removed the surface contaminants and dramatically improved the corrosion resistance.

Takamura, T., and I. Koezuka, 1965. Infrared evidence of the grinding effect on hydrargillite single crystals. Nature 207 965. 

---