Division, dispersions

BASF, Fibers Division, Dispersions Textile Chemicals Group Burlington Chemical Co. 

Drilling fluids are classified as to the nature of the continuous phase gas, water, oil, or synthetic. Within each classification are divisions based on composition or chemistry of the fluid or the dispersed phase. 

SynaHoy Corp., Blackman Uhler Chemical Division CDR Pigments and Dispersions Ciba-Geigy Corp. 

Zerteilung, /. division separation, dissolution, resolution, dispersion. 

A 57% dispersion of sodium hydride in mineral oil was purchased from Alfa Division, Ventron Corporation. A 5.90-g. portion of the dispersion was placed in the reaction vessel and washed free of mineral oil with three 50-ml. portions of pentane by decanting the supernatant pentane after each washing. The pentane that remains in the flask is evaporated as the assembled apparatus is purged with nitrogen prior to adding the tetr ahy drof ur an. 

Fig. 2.3 The development of polarity and asymmetric division in Saccharomyces cerevisiae. The diagram is reproduced in a slightly simplified form from the work of Lew Reed (1995) with the permission of Current Opinion in Genetics and Development, (a) The F-actin cytoskeleton strands = actin cables ( ) cortical actin patches, (b) The polarity of growth is indicated by the direction of the arrows (arrows in many directions signifies isotropic growth), (c) 10-nm filaments which are assembled to form a ring at the neck between mother and bud. (d) Construction of the cap at the pre-bud site. Notice that the proteins of the cap become dispersed at the apical/isotropic switch, first over the whole surface of the bud, then more widely. Finally, secretion becomes refocussed at the neck in time for cytokinesis, (e) The status and distribution of the nucleus and microtubules of the spindle. Notice how the spindle pole body ( ) plays an important part in orientation of the mitotic spindle.

Slade, L. and Levine, H. 1985. Intermediate moisture systems concentrated and supersaturated solutions pastes and dispersions water as plasticizer the mystique of bound water thermodynamics versus kinetics (Number 24). Presented at Faraday Division, Royal Society of Chemistry Discussion Conference - Water Activity A Credible Measure of Technological Performance and Physiological Viability Cambridge, July 1-3. 

The prevailing view of the dynamics of many phytoplankton blooms is that they often terminate due to nutrient exhaustion, increased grazing pressure, and/or physical dispersal. Evidence is now accumulating that tamarensis blooms have ended when grazing and advection were low and nutrients were above detection limits (18, 21). Instead of persisting without division as nutrients disappear... 

This review comprises most of the presentations given at the RSC Industrial Affairs Division Speciality Chemicals Sector conference titled Speciality Chemicals in Mineral Processing held in Bath, UK in 2001. The papers presented here are not intended to represent a comprehensive review of the use of speciality chemicals in mineral processing but rather the intention is to highlight a significant advance in chemical use in each of a number of different mineral process unit operations. The book is divided into three sections (i) dispersion and flocculation, (ii) selective processing and (iii) microbiological control. Within each of these areas papers are presented that cover some of the most important recent research and developments from both academia and industry. 

A number of factors contributed to the Allied defeat. German dive bombers acted as mobile artillery, and the concentrated mass of panzer divisions overwhelmed the widely dispersed French tanks and advanced to the Channel, cutting the Allied armies in two. The British Tank... 

Inc. sodium hydride (58% dispersion in mineral oil), Alfa Products, Division of the Ventron Corporation trichloroacetonitrile, Aldrich Chemical Company, Inc. xylene (a mixture of isomers, b.p. 137—144°), Mallinckrodt Chemical Works anhydrous ethyl ether, Mallinckrodt Chemical Works Silica Gel (Grade 62), Grace Davidson Chemical. The reagents used by the checkers were obtained from the following sources geraniol (98.7%), sodium hydride (58% dispersion in mineral oil), trichloroacetonitrile, and xylene (a mixture of isomers, b.p. 137-143°), Fluka AG, Chemische Fabrik, Buchs, Switzerland Silica gel (70-230 mesh ASTM), E. Merck AG, Darmstadt, Germany. 

Commercial Dibenzoyl peroxide is manufd in this country under the name "Lucidol "by the Luc idol Division of Wallace Tiernan Inc, Buffalo, NY. Other trade names of the coml product are Luperco"(finely dispersed with an org or inorg filler) and "Luperox" (pastes, dispersed in water or oils of various types)... 

In most multicellular eukaryotes, the nuclear envelope breaks down at each cell division, and once division is completed and the nuclear envelope reestablished, the dispersed nuclear proteins must be reimported. To allow this repeated nuclear importation, the signal sequence that targets a protein to the nucleus—the nuclear localization sequence, NLS—is not removed after the protein arrives at its destination. An NLS, unlike other signal sequences, may be located almost anywhere along the primary sequence of the protein. NLSs can vary considerably, but many consist of four to eight amino acid residues and include several consecutive basic (Arg or Lys) residues. 

In the following review there are six technical sections, the first three covering dyes. The division has been made on the basis of the nature of the electronic character of the dye molecule. Anionic dyes are applied to hydrophilic fibres whilst cationic dyes are applied mainly to acrylic fibres. The neutral disperse dyes are used mainly on the hydrophobic polyester fabrics. Then follow sections covering pigments, a short summary of fluorescent brightening agents and, finally, an introduction to the subject of colour and chemical constitution. 

The pests are destroyed by absorbing the powder either through the mouth or through the body by contact, and the sprays and dusts should contain minimum quantities of water-soluble arsenic, as this is mainly responsible for foliage injury the fineness of division also has an effect, and injury is increased if the arsenate is too highly dispersed.5 In the United States a legal limit (0-75 per cent. As2Os) is imposed as to the amount of water-soluble arsenic that may be present in lead... 

Figure 183. Drums with coalescers for assisting in the separation of small amounts of entrained liquid, (a) A liquid-liquid separating drum equipped with a coalescer for the removal of small amounts of dispersed phase. In water-hydrocarbon systems, the pot may be designed for 0.5 ft/sec (Facet Enterprises, Industrial Division), (b) An oil-water separator with corrugated plate coalescers (General Electric Co.).

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