Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Vertical method

The vertical method shown above has sometimes been called the "floating zone" method. The thickness of polycrystalline rod determines the... [Pg.275]

Both, these forma of mailer are used generally in the forests, and perhaps it is difficult to say which is preferable. Among the Swedish burners it has been established that more charcoal is obtained when the logs are piled up horizontally, than when they are arranged in a nearly vertical position but the charring is-not so well or so readily effected. With the lecond or vertical method, the loss by combustion is much greater, bnt the quality of the charcoal produced is superior to that obtained by the other processes. [Pg.49]

Once identified all possible combination of the variables could of course be tested, however, this is typically prohibitively resource intensive to be practical. DoE is a class of statistically ba.sed methods to select combinations of variables that may be tested to yield the same information using a reduced number of experiments. DoE is often used in a totally empirical manner however, the knowledge of potentially critical variables can greatly simplify the process. DoEs may take the form of simple experiments which bracket the extremes of variable combinations, the so called extreme vertices method, or may be more intricate. Commonly, a partial matrix type screening DoE will be executed to zero in on the ranges in variables that show the maximum impact and/or that most closely bracket the desired responses from the process. This is followed by a more focused matrix DoE to determine optimum ranges of operations. [Pg.326]

There was found by AFM extremely smooth surface film, the behenic acid, HD and (HD)2Cu monolayers transferred by HP method on hydrophilic silicon surface and a little bit disordered for HD and amorphous for behenic acid and (HD)2Cu (with numerous porous defects) on Si/Si02/0TS smface. On the contrary, the best quality of multilayer film was observed in the case of (HD)2Cu film transferred on hydrophobic silicon plate by vertical method. [Pg.417]

Figure 16.2 A thermodynamic cycle. If the path being used to calculate free energy moves horizontally employing methods like MM-PBSA, MM-GBSA or LIE, these calculations are referred to as endpoint calculations . Until recently, endpoint calculations were considered better suited for diverse ligands. If the path used to calculate free energy is vertical, methods like FEP, TI or NE are employed. These calculations are referred to as alchemical transformation calculations because ligand 1 is transformed through a series of steps into ligand 2. Figure 16.2 A thermodynamic cycle. If the path being used to calculate free energy moves horizontally employing methods like MM-PBSA, MM-GBSA or LIE, these calculations are referred to as endpoint calculations . Until recently, endpoint calculations were considered better suited for diverse ligands. If the path used to calculate free energy is vertical, methods like FEP, TI or NE are employed. These calculations are referred to as alchemical transformation calculations because ligand 1 is transformed through a series of steps into ligand 2.
With the piggyback method, rmits can be angled above the main rmit. This method saves floor space like the vertical method but requires less ceiling height. The additional unit can be moved in two ways. Attached to the main rmit but with the nozzles thermally separated or with a cylinder which moves separately from the main cylinder. [Pg.243]

There is only one method available that allows the study of the vertical and lateral relationship of the different rock types of a reservoir on a scale of 1 1. This is the study of outcrops. These are areas like quarries, readouts, cliffs, mines, etc., which consist of a sequence known to be a reservoir in the vicinity or the lateral equivalent thereof. Detailed investigation of a suitable outcrop can often be used as a predictive tool to model ... [Pg.25]

When using the gradient method described above, conventional flat-bottom hole standards can not be used. Tbe probe will see only the edges of the holes and they all have the same gradient, i.e. vertical steepness, and will give the same signal responses. [Pg.286]

Tomographic summation images of vertical, horizontal and cylindrical layers were generated by positioning the film in suitable positions. The method has a deficiency when the films have to be positioned close one to the other. Hence for the generation of close or overlapping cuts there is a need for repeated exposures. [Pg.477]

Shortcomings of Wang s method like limited pitch of the spiral and blurring in the vertical direction can be improved by the CFBP-algorithm [10], where gaps in the spiral sampling pattern are filled using X-rays measured from the opposite side. [Pg.494]

Perhaps the best discussions of the experimental aspects of the capillary rise method are still those given by Richards and Carver [20] and Harkins and Brown [21]. For the most accurate work, it is necessary that the liquid wet the wall of the capillary so that there be no uncertainty as to the contact angle. Because of its transparency and because it is wet by most liquids, a glass capillary is most commonly used. The glass must be very clean, and even so it is wise to use a receding meniscus. The capillary must be accurately vertical, of accurately known and uniform radius, and should not deviate from circularity in cross section by more than a few percent. [Pg.16]

As an extension of Problem 11, integrate a second time to obtain the equation for the meniscus profile in the Neumann method. Plot this profile as y/a versus x/a, where y is the vertical elevation of a point on the meniscus (above the flat liquid surface), x is the distance of the point from the slide, and a is the capillary constant. (All meniscus profiles, regardless of contact angle, can be located on this plot.)... [Pg.380]

The atomic structure of a surface is usually not a simple tennination of the bulk structure. A classification exists based on the relation of surface to bulk stnicture. A bulk truncated surface has a structure identical to that of the bulk. A relaxed surface has the synnnetry of the bulk stnicture but different interatomic spacings. With respect to the first and second layers, lateral relaxation refers to shifts in layer registry and vertical relaxation refers to shifts in layer spacings. A reconstructed surface has a synnnetry different from that of the bulk synnnetry. The methods of stnictural analysis will be delineated below. [Pg.1813]

The energies of this Cl and of the other ones calculated in this work are listed in Table III. The calculated CASSCF values of the energies of the two lowest electronically states are 9.0 eV (5i, vertical) and 10.3 eV ( 2, vertical) [99]. They are considerably higher than the expenmental ones, as noted for this method by other workers [65]. In all cases, the computed conical intersections lie at much lower energies than the excited state, and are easily accessible upon excitation to Si. In the case of the H/allyl Cl, the validity confirmation process recovered the CHDN and 1,3-CHDN anchors. An attempt to approach the third anchor [BCE(I)] resulted instead in a biradical, shown in Figure 43. The bhadical may be regarded as a resonance hybrid of two allyl-type biradicals. [Pg.378]

Figure 7-24. The Pople diagram . The vertical axis gives the size of the basis set and the horizontal axis the correlation treatment. The basis sets and methods given are chosen from the examples discussed in the text. Their positions on the axes (but not the order) are arbitrary. Figure 7-24. The Pople diagram . The vertical axis gives the size of the basis set and the horizontal axis the correlation treatment. The basis sets and methods given are chosen from the examples discussed in the text. Their positions on the axes (but not the order) are arbitrary.
Another technique for obtaining an ionization potential is to use the negative of the HOMO energy from a Hartree-Fock calculation. This is called Koopman s theorem it estimates vertical transitions. This does not apply to methods other than HF but gives a good prediction of the ionization potential for many classes of compounds. [Pg.112]

Cahbration can also be accompHshed usiag material weighed on another scale. The accuracy of this method depends on the accuracy of the other scale, and care must be taken not to lose any of the weighed material. Scales can also be caUbrated electrically usiag a load cell simulator if the load cells rated outputs are known accurately. This method does aot test the mechanical fiinctioning of the scale and is not very accurate, particularly if it has attached piping that restricts its vertical movement. [Pg.338]


See other pages where Vertical method is mentioned: [Pg.344]    [Pg.77]    [Pg.124]    [Pg.344]    [Pg.77]    [Pg.124]    [Pg.387]    [Pg.289]    [Pg.20]    [Pg.244]    [Pg.286]    [Pg.365]    [Pg.721]    [Pg.835]    [Pg.364]    [Pg.1717]    [Pg.1808]    [Pg.377]    [Pg.150]    [Pg.276]    [Pg.276]    [Pg.440]    [Pg.323]    [Pg.402]    [Pg.1107]    [Pg.452]    [Pg.197]    [Pg.105]    [Pg.115]    [Pg.132]    [Pg.49]    [Pg.65]    [Pg.314]    [Pg.406]   
See also in sourсe #XX -- [ Pg.344 ]

See also in sourсe #XX -- [ Pg.3 , Pg.7 , Pg.139 , Pg.168 , Pg.235 , Pg.258 ]




SEARCH



EOMCC method vertical excitation energy

Vertical dipping method

Vertical morphology characterization methods

Vertical ring method

Vertical separation method

Vertical-stream method

© 2024 chempedia.info