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Direct membranes

The polypeptide chain of Src tyrosine kinase, and related family members, comprises an N-terminal "unique" region, which directs membrane association and other as yet unknown functions, followed by a SH3 domain, a SH2 domain, and the two lobes of the protein kinase. Members of this family can be phosphorylated at two important tyrosine residues—one in the "activation loop" of the kinase domain (Tyr 419 in c-Src), the other in a short... [Pg.275]

The mechanisms of the allergy-like reactions to RCM are still a matter of speculation (table 2). Anaphylaxis to RCM has been discussed to be due to a direct membrane effect possibly related to the osmolality of the RCM solution or the chemical structure of the RCM molecule (pseudo-allergy) [2], an activation of the complement system [27], a direct bradykinin formation [28], or an IgE-mediated mechanism [3]. [Pg.160]

There seems to be an opportunity to extend the electrochemical process to direct membrane transport that is, with electrodes plated on either side of a facilitated-transport membrane similar to that of Johnson [24]. The shuttling action of the carrier (Fig. 9) could then be brought about by electrochemical reduction and oxidation instead of pressure difference. [Pg.219]

Progesterone produces direct membrane effects [16]. These include actions that promote maturation of spermatozoa as well as oocytes and facilitation of the release of neurotransmitters such as dopamine and LH-releasing hormone (LHRH) (Fig. 52-7). Membrane actions of progesterone also activate oxytocin receptors in the hypothalamus in a way that enables oxytocin to turn on sexual behavior in the estrogen-primed female rat [3],... [Pg.853]

Valproic acid may potentiate postsynaptic GABA responses, may have a direct membrane-stabilizing effect, and may affect potassium channels. [Pg.610]

Propranolol 13- Adrenoceptor blockade Direct membrane effects (sodium channel block) and prolongation of action potential duration slows SA node automaticity and AV nodal conduction velocity Atrial arrhythmias and prevention of recurrent infarction and sudden death Oral, parenteral duration 4-6 h Toxicity Asthma, AV blockade, acute heart failure Interactions With other cardiac depressants and hypotensive drugs... [Pg.295]

FIGURE 4.1 (a) MIMS systems with direct membrane sampling and (b) direct insertion probe in MS... [Pg.77]

Table 21.1 List of most common membranes used in direct membrane emulsification. [Pg.469]

Both crossflow and deadend systems can be used in premix and direct membrane emulsification. In the crossflow premix system the coarse emulsion is diluted by permeation into pure continuous phase/diluted emulsion recirculating at the low-pressure side of the membrane. In the deadend system the fine emulsion is withdrawn as a product after passing through the membrane, without any recirculation and/or dilution with the continuous phase. In this process, the fine emulsion can... [Pg.476]

Droplet formation during direct membrane emulsification and in particular in crossflow emulsification has been described using models different in the scale and in the considered mathematical and physical phenomena, such as ... [Pg.479]

Although the premix membrane emulsification can yield larger fluxes with respect to direct membrane emulsification neither methods using surface-energy minimization nor microfluid dynamics approaches have been until now reported on the theoretical treatment of the premix membrane emulsification. [Pg.488]

Direct membrane separating process for producing inulin and oligofructose Patent number CN1389468 (2003)... [Pg.432]

The invention relates to a method for producing oligofructose by direct membrane separation from Jerusalem artichoke or chicory. [Pg.432]

The principles, sampling systems, control of the measuring device and application of MS for bioprocesses have been summarized by Heinzle [157,158] and Heinzle and Reuss [162]. Samples are introduced into a vacuum (< 10 5 bar) via a capillary (heated, stainless steel or fused silica, 0.3 x 1000 mm or longer) or a direct membrane inlet, for example, silicon or Teflon [72,412]. Electron impact ionization with high energy (approx. 70 eV) causes (undesired) extensive fragmentation but is commonly applied. Mass separation can be obtained either by quadrupole or magnetic instruments and the detection should be performed by (fast and sensitive) secondary electron multipliers rather than (slower and less sensitive) Faraday cups (Fig. 21). [Pg.29]

Jannasch, H.W., 1958. Studies on planktonic bacteria by means of a direct membrane filter method. J. Gen. Microbiol., 18 609—620. [Pg.289]

Propranolol and sotalol are non-selective (1-ad renoceptor antagonists that differ in the relative contributions of their (h-blocking (decreased atrioventricular nodal conduction, propranolol) and direct membrane (prolonged... [Pg.140]

In addition to direct membrane analogs, many researchers have used Cg, Cis, and XAD resins to simulate the bioavailability of organic compounds. Lake et al. (1996) used Cig resins as a surrogate for benthic organism bioaccumulation of hydrophobic compounds from sediments. Gustafson and Dickhut (1997) and Ankley et al. (1991) also utilized resins to sorb compounds for the assessment of toxicity (and bioavailability) of contaminants in sediments. [Pg.149]


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See also in sourсe #XX -- [ Pg.1073 ]




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