Sheathe, sheathing

Sheath Sheath is the fluid within which the central sample core is contained during coaxial flow within and from the flow cell of a flow cytometer. 

Numerically, the Child law sheath can be of the order of 100 Debye lengths in conditions of typical low-pressure discharges applied for surface treatment. More details regarding sheaths, including collisional sheaths, sheaths in electronegative gases, radioftequency plasma sheaths, and pulsed potential sheaths can be found, in particular, in the book of Lieberman and Lichtenberg (1994). 

Mechanical sheaths sheaths composed of metal. Teflon, polypropylene, or other materials they require manual advancement over the lead and rely on the mechanical properties of the sheath to disrupt fibrotic adhesions. 

Laser sheaths sheaths that employ fiberoptics... 

Electrosurgical sheaths sheaths that use radiofrequency energy (such as that found in an electrosurgical unit) emitted between two electrodes at the sheath tip to disrupt the fibrotic adhesions. 

Rotating threaded-tip sheath sheaths equipped with a rotationally powered mechanism that bore through and disrupt fibrotic adhesions with a threaded screw mechanism at the sheath tip. 

Fig. 6.8 Flexible telescoping sheaths mounted on inner metal dilator sheaths. Sheaths 1,3, and 5 from the left are seen apphed over the metal dilator. (Photograph conrtesy of Cook Pacemaker Corp.)...

C llulos T1O2 Sutfact Core Cellulose Core Cellulose Loaded Cellulose Sheath Sheath Ti02... 

Property Test Method Mandrel Mandrel Mandrel Mandrel SX HX HXO HXP Sheath Sheath MX002 MX004 ... 

The solute-solvent interaction in equation A2.4.19 is a measure of the solvation energy of the solute species at infinite dilution. The basic model for ionic hydration is shown in figure A2.4.3 [5] there is an iimer hydration sheath of water molecules whose orientation is essentially detemiined entirely by the field due to the central ion. The number of water molecules in this iimer sheath depends on the size and chemistry of the central ion ... 

The secondary hydration sheath has also been studied using vibrational spectroscopy. In the presence of... 

With the knowledge now of the magnitude of the mobility, we can use equation A2.4.38 to calculate the radii of the ions thus for lithium, using the value of 0.000 89 kg s for the viscosity of pure water (since we are using the conductivity at infinite dilution), the radius is calculated to be 2.38 x 10 m (=2.38 A). This can be contrasted with the crystalline ionic radius of Li, which has the value 0.78 A. The difference between these values reflects the presence of the hydration sheath of water molecules as we showed above, the... 

In principle, simulation teclmiques can be used, and Monte Carlo simulations of the primitive model of electrolyte solutions have appeared since the 1960s. Results for the osmotic coefficients are given for comparison in table A2.4.4 together with results from the MSA, PY and HNC approaches. The primitive model is clearly deficient for values of r. close to the closest distance of approach of the ions. Many years ago, Gurney [H] noted that when two ions are close enough together for their solvation sheaths to overlap, some solvent molecules become freed from ionic attraction and are effectively returned to the bulk [12]. 

There is, or may be, an iimer layer of specifically adsorbed anions on the surface these anions have displaced one or more solvent molecules and have lost part of their iimer solvation sheath. An imaginary plane can be drawn tlirough the centres of these anions to fomi the inner Helmholtz plane (IHP). 

The layer of solvent molecules not directly adjacent to the metal is the closest distance of approach of solvated cations. Since the enthalpy of solvation of cations is nomially substantially larger than that of anions, it is nomially expected that tiiere will be insufBcient energy to strip the cations of their iimer solvation sheaths, and a second imaginary plane can be drawn tlirough the centres of the solvated cations. This second plane is temied the outer Helmholtz plane (OHP). 

Within this framework, by considering the physical situation of the electrode double layer, the free energy of activation of an electron transfer reaction can be identified with the reorganization energy of the solvation sheath around the ion. This idea will be carried through in detail for the simple case of the strongly solvated... 

However, the equation can be simplified, since the system is synmietrical and the radius of the disc is nomrally small compared to the insulating sheath. The access of the solution to the electrode surface may be regarded as imifomi and the flux may be described as a one-dimensional system, where the movement of species to the electrode surface occurs in one direction only, namely that perpendicular to the electrode surface ... 

Non-thennal plasmas in contact with insulating walls (substrate) have an important property. The plasma with the hot electrons is positively charged relative to the wall (self-bias). A sheath with a positive space charge and an electric field is fonned between the wall and the plasma. The hot electrons travel faster to the wall than the heavy... 

Figure C2.18.3. Relationship between ion-assisted etching and directionality in plasma etching, (a) Demonstration of the synergy between ion bombardment and reactive species during ion-assisted etching, (b) Ions incident on an etched feature. This situation prevails in glow discharges when the feature dimensions are much less than the plasma sheath thickness. Reproduced from [35]...

Cerebrosides are found in the brain and in the myelin sheath of nerve tissue The structure of the cerebroside phrenosine is... 

The noble metal thermocouples, Types B, R, and S, are all platinum or platinum-rhodium thermocouples and hence share many of the same characteristics. Metallic vapor diffusion at high temperatures can readily change the platinum wire calibration, hence platinum wires should only be used inside a nonmetallic sheath such as high-purity alumina. 

Foam-injection molding Foam plastic sheathing Foam products Foam regulators Foam rheology... 

Residential sheathing Residual fuel Residual fuel oil Residual gas analyzers... 

Shaving products Shaw process Shear breeding Shear energy Shearlings Shearometer Shear plane Shear rate Shear stresses Shear test Shear thinning behavior Shear viscosity Sheath-core fiber... 

Stmctural insulation boards are used primarily for wall sheathing in constmctions where wall diaphragm racking resistance is provided by other means, such as stmctural panel corner bracing or metal strip bracing. Where allowed by building codes, these methods of constmction do provide more economical constmction. 

Economic Aspects. In 1994 there were 8 operational insulation board producers in the United States. These mills produced about 1.15 X 10 m (2). The number of mills and total production volume have also decreased in this industry, primarily as a result of changes in building codes and avadabihty of other competitive sheathing products. Both wood composite panels and plastic foam sheathings have captured a segment of these markets. 

Then, in the early 1980s the concept of OSB was realized in the constmction and operation of large-size mills. OSB is a panel product made from wood strands and somewhat like plywood in that the strands on the two faces are oriented in the long direction of the panel and the core strands are oriented in the cross-panel direction. The use of orientation yields panels having exceUent directional properties, much like plywood, and thus an exceUent and economical stmctural sheathing material is created. 

Secondary Treatment and Uses. The vast majority of OSB panels are used "as is," without further processing or treatment. Primary uses are as wall and roof sheathing, floor decking, and other constmction panel uses in home and commercial constmction. OSB products are effectively filling in for the decline in plywood production. Small amounts of OSB are used in furniture, primarily as frame stock, and in other uses in which plywood might be used. 

Economic Aspects. There were 31 OSB plants in the United States in 1994 and these produced 6.625 x 10 m of OSB products (2). This industry is growing rapidly in both Canada and the United States. In fact, many of the composite mills currently under constmction are designed to produce OSB or similar products based on strands. Outside of North America, where building practices are not yet extensively utilizing the distinct advantages of the stud wall and plywood/OSB sheathing, there are only a few operating OSB plants. There are also small export markets for OSB products in Europe and the Far East. 

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