Scissoring

Fiorentini V and Baldereschi A 1995 Dielectric scaling of the self-energy scissor operator in semiconductors and insulators Phys. Rev. B 51 17 196... 

Delicate forceps, needles, thread, scissors, and safety pins. 

Methyl bonding, methylene scissor, and 7car-N modes occur at 1460 to 1340 cm" . Ring bonding and methyl rocking modes are found at 1040 to 1070 and 980 cm" , respectively. Four bands, at 600 to 700. 550 to 600. 

SO,- 1330-1260 (m-s) 1155-1110 (s) 610-540 (m) 512-485 (m) Asymmetric SO2 stretching Symmetric SO2 stretching Scissoring mode of aryls Scissoring mode of alkyls... 

Commonly used descriptions for these vibrations are (i) symmetric CH-stretch, (ii) antisymmetric CH-stretch, (iii) CH2-scissors, (iv) CH2-rock, (v) CO-stretch, (vi) out-of-plane bend. 

In addition to the descriptions of group vibrations as stretch and bend (or deformation) the terms rock, twist, scissors, wag, torsion, ring breathing and inversion (or umbrella) are used frequently these motions are illustrated in Figure 6.13. 

Figure 6.13 Illustration of (a) rocking, (b) twisting, (c) scissoring and (d) wagging vibrations in a CH2 group. Also shown are (e) the torsional vibration in ethylene, (f) the ring-breathing vibration in benzene and (g) the inversion, or umbrella, vibration in ammonia...

Disinfectants are used in janitorial suppHes for hospitals and the home to treat toilet bowls, floors and walls in sick rooms, operating rooms, and wherever infective microorganisms are a problem. Instmments such as scalpels, scissors, catheters, and endoscopes used to invade tissues are treated with disinfectants, as are dental instmments. Laws require that hospital waste must be disinfected so that bacteria and vimses, such as the hepatitis vims and the AIDS vims, do not infect hospital workers and people in the community. 

Structure Symmetry Ring breathing C-H stretch CH2 scissoring CHi wagging Ref. 

Figure 2.21 Orange oxides weeping from a tight seam in a martensitic (440) stainless steel surgical scissors. (Magnification 15x.)...

Slugs of lithium, coated with paraffin oil, are hammered into thin foil. They are washed free of oil with dry ether and cut by scissors into slips which are allowed to fall directly into the ether in the reaction flask. 

Thus, we reject the mechanism of scissoring and try to look near the free edges in the boundary layer to evaluate the stresses. Then, in Section 4.6, we predict very large stresses that in practical situations cause premature static failure and adversely influence the fatigue life of a laminate as well. Our problem is the quantitative prediction of those... 

As high technology continues to transform the modern biochemical laboratory, it is interesting to reflect on Linns Pauling s discovery of the u-helix. It involved only a piece of paper, a pencil, scissors, and a sick Linus Pauling, who had tired of reading detective novels. The story is told in the excellent book The Eighth Day of Creation by Horace Freeland Judson ... 

In the early days of chemical modelling, people did indeed construct models from plastic atoms and bonds, a mler and a pair of scissors. The tendency now is to reach for the PC, and one aim of this book is to give you an insight into the bewitching acronyms that lie behind the keystrokes and mouse clicks of a sophisticated modelling package. 

Scherben-kobalt, -stein, m. native arsenic, Schere,/. scissors, shears cutter notch, nick ... 

Alzheimer s Disease. Figure 2 A(3 is derived from the APP by the sequential action of proteolytic activities exerted by (3- and y-secretases. APP-CTF is (C99) produced after cleavage of the APP by (3-secretase and represents the substrate of the y-secretase. The yellow box marks membrane embedded amino acid residues of A(3 peptide. Scissors represent the main cleavage sites of (3- and y-secretase, e.g. the e- and y-cleavages at positions 49,46, 42, 40 and 38. 

A leucine zipper is a structural motif present in a large class of transcription factors. These dimeric proteins contain two extended alpha helices that grip the DNA molecule much like a pair of scissors at adjacent major grooves. The coiled-coil dimerization domain contains precisely spaced leucine residues which are required for the interaction of the two monomers. Some DNA-binding proteins with this general motif contain other hydrophobic amino acids in these positions hence, this structural motif is generally called a basic zipper. 

Lithium wire purchased from the Lithium Corporation of America, Inc. was used. The wire was cut in 2.5-5.0-cm. pieces, washed free of the protective oil with ether, and weighed by transferring quickly to a tared beaker containing mineral oil. The lengths of wire were again washed in a beaker of ether and then held with forceps over an open neck of the reaction flask (positive nitrogen flow), cut with scissors into 3-4-mm. pieces, and allowed to fall directly into the flask. 

Easy availability of ultrafast high intensity lasers has fuelled the dream of their use as molecular scissors to cleave selected bonds (1-3). Theoretical approaches to laser assisted control of chemical reactions have kept pace and demonstrated remarkable success (4,5) with experimental results (6-9) buttressing the theoretical claims. The different tablished theoretical approaches to control have been reviewed recently (10). While the focus of these theoretical approaches has been on field design, the photodissociation yield has also been found to be extremely sensitive to the initial vibrational state from which photolysis is induced and results for (11), HI (12,13), HCl (14) and HOD (2,3,15,16) reveal a crucial role for the initial state of the system in product selectivity and enhancement. This critical dependence on initial vibrational state indicates that a suitably optimized linear superposition of the field free vibrational states may be another route to selective control of photodissociation. 

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