Plastics cells from

Eoamable compositions in which the pressure within the cells is increased relative to that of the surroundings have generally been called expandable formulations. Both chemical and physical processes are used to stabilize plastic foams from expandable formulations. There is no single name for the group of cellular plastics produced by the decompression processes. The various operations used to make cellular plastics by this principle are extmsion, injection mol ding, and compression molding. Either physical or chemical methods may be used to stabilize products of the decompression process. 

Membranes are highly viscous, plastic structures. Plasma membranes form closed compartments around cellular protoplasm to separate one cell from another and thus permit cellular individuality. The plasma membrane has selective permeabilities and acts as a barrier, thereby maintaining differences in composition between the inside and outside of the cell. The selective permeabilities are provided mainly by channels and pumps for ions and substrates. The plasma membrane also exchanges material with the extracellular environment by exocytosis and endocytosis, and there are special areas of membrane strucmre—the gap junctions— through which adjacent cells exchange material. In addition, the plasma membrane plays key roles in cellcell interactions and in transmembrane signaling. 

Electrodeposition has been attempted also on flexible substrates within the scope of fabricating flexible solar cells. Huang et al. [177] investigated the electrodeposition of CIS on Au-coated plastic substrate from aqueous acidic (pH 1.65) solutions of millimolar CuCh, InCb, Se02, containing triethanolamine and sodium citrate. Stoichiometric, semiconductive CIS films (Eg = 1.18 eV) were obtained after annealing at 150 °C in nitrogen. 

Dennler, G. Sariciftci, N. S. 2005. Flexible conjugated polymer-based plastic solar cells from basics to applications. Proc. IEEE. 93 1429-1439. 

The assumption that the difference between the incident and the transmitted radiation is a measure of the radiation absorbed by the analyte is not completely true because this may not be the only reason why the incident radiation does not appear in the transmitted form. A certain amount of radiation will be reflected from the surface of the sample holder, usually a glass or plastic cell, or absorbed by the material of which the cell is composed. The sample may also be dissolved in a solvent which itself may also absorb or reflect radiation ... 

An Austrian team boosts the performance of plastic cells by mixing a conducting polymer, MDMO-PPV (an asymmetrically substituted polyphenylenevinylene),with a molecule made from carbon fullerene. .. 

Adhesion of mononuclear cells from human bone marrow aspirates (BM-MNC) to tissue culture plastic and removal of nonadherent cells during the first days of culture selects for a population of proliferating spindle-shaped fibroblast-like non-... 

Colter, D. C, Class, R., DiGirolamo, . M., Prockop, D. J. (2000), Rapid expansion of recycling stem cells in cultures of plastic-adherent cells from human bone marrow, Proc. Nat. Acad. Sci. USA, 97(7), 3213-3218. 

Transfer hybridoma cells from the 96-well cloning culture plate to a 24-well culture plate in 1 mL of fresh CM (see Note 4) using gentle pipetting to dislodge the cells from the plastic (see Note 5). 

Fig. 3.8. L929 cells were seeded in 100 ml GMEM with 10% calf serum at 3 cells per microcarrier bead onto 5 x10s Cl-(Cytodex 1), P(Biosilon) or G (Bioglas) beads. The cell number was estimated by releasing the cells with trypsin, briefly allowing the beads to settle and counting the cells with a Coulter counter. Difficulty was encountered releasing the cells from Cytodex, but cells attached only weakly to the glass and particularly to the plastic beads and many cells were free in suspension. The use of electronic cell counters is not recommended for counting cells released from microcarriers as the orifice occasionally becomes blocked by small microcarriers in the...

Figure 8-18. Intact (a) and exploded (b) views of a disposable micro-Ouchterlony plate. The components include, from bottom to top, (1) a base unit containing a small circular channel into which water is placed to preserve a moist atmosphere during incubation (arrow) (2) agarose through which the antigen and antibody diffuse (3) a plastic center-piece containing the sample reservoirs (4) a moisture seal to prevent the cells from drying out during storage and (5) a cap for the entire cell. (Courtesy of Cordis Laboratories, Miami, Fla.)...

The preparation of a suspension of leucocytes from solid tissues is comparatively straightforward (Section 3.3.). The preparation of other cells from solid tissues is more difficult the procedures depend on the tissue and the type of cell required (1). Most methods involve the use of proteolytic enzymes that may destroy surface antigens. Frequently, better results are obtained if the cells are put in short-term culture. Section 3.4. gives a method for preparing cells grown on a plastic surface. 

You can obtain IR spectra of solids, liquids and gases by use of the appropriate sample cell (sample holder). The sample holder must be completely transparent to IR radiation consequently glass and plastic cells cannot be used. The most common sample cells you will encounter are made from sodium chloride or potassium bromide and you cannot use aqueous... 

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