Paper curl

In 1985. similar experiments were conducted at Rice University. In a 1988 paper. Curl and Smalley (Rice University) outlined their experiments with carbon cluster beams, essentially using the clusler-generaung apparatus previously described by the Exxon researchers. Initially, this experimentation was motivated by an interest that had been shown by die astrophysicist, Krotu (University of Sussex), who had been modeling the formation of carbon molecules in circumstellar shells. As a consequence, the Rice University team concentrated its studies on the smaller (2- to 30-atom) carbon clusters. As pointed out in the Curl-Smalley paper, the objective was to determine if some or all of the species had the same form as the long linear carbon chains known to be abundant in interstellar space."... 

C. If the static-eliminator strip is absent (or broken) in either an EP process or HP LaserJet laser printer, this will cause the paper to maintain its positive charge. Should this occur, paper jams may result due to the paper curling around the photosensitive drum. 

Paper curls and wrinkles as its moisture content is changed by ambient humidity and the fusing process. Sheets become charged and stick to surfaces where they are not wanted. To the engineer, paper is a source of fibers, clay, rosin, and other forms of aggravation (7j4, Hi, 142). ... 

However, since ink is in a liquid state due to the inherent characteristics of inlqet printing, the printing paper curls due to the moisture present in the ink after image printing. So a curling phenomenon occurs. A reaction solution including a polyvalent metal salt and a cationic polymer alone may not prevent such a paper curling. 

Timofeev, J. Keranen, H. Kiiskinen, Paper curl induced by drying. Pulp ei Paper Canada 2002, 103(8), T 204. 

Curl Control. Many grades of paper tend to cud, especially as humidity varies, because of the stresses produced duting the dryiag process. This is especially troublesome when only one side of the paper receives a surface treatment. Judicious appHcation of water to the opposite side of the dry sheet followed by redryiag may correct the curling. Water may be appHed by surface appHcation at the size press, water box, or calender stack or it may be sprayed on. Small amounts of water can be appHed to the paper surface as a foam with exceUent results. 

Get a piece of filter paper large enough to cover all the holes in the bottom plate, yet not curl up the sides of the funnel. It is placed flat on the plate (Fig. 46). 

Fold a sheet of paper lengthwise. Curl the folded paper so that it fits inside the 600 mL beaker. Invert the beaker on your lab bench. 

In the steady state dg/dJ = 0 for each value of a, while the boundary condition requires that for a = 1, g = l/K. When for a certain case all the parameters n, K, I, t, and Co are kept constant the solution of the dynamic equations must evolve to that of the steady state. On a digital computer this procedure has been followed by Curl (C8). He used different numbers of A a intervals (25, 50, and 100), let the transient evolve to the steady state, and then extrapolated the calculated values of g a) to Aa = 0. For the procedure followed by Veltkamp to solve these equations, one must be referred to his paper (V2). 

It is interesting to note that while both Harry Kroto and Robert Curl were primarily interested in microwave spectroscopy, they published papers in the field of theoretical chemistry in the 1960s. For example, the paper by R. F. Curl Jr. and C. A. Coulson [Proc. Phys. Soc., 78,831 (1965)], Coulomb Hole in the Ground State of Two-Electron Atoms, resulted from a sabbatical year at Oxford. See also, H. W. Kroto and D. P. Santry, J. Chem. Phys., 47, 792 (1967). CNDO Molecular-Orbital Theory of Molecular Spectra. I. The Virtual-Orbital Approximation to Excited States. 

After you have applied the mask, soak the print in water Fiber-based prints for 5 minutes RC papers for no more than two minutes. Then immerse the print in the toning solution. The print might buckle or curl, but keep it immersed as much as possible. If the toner tends to bleed under the mask you may have to skip the presoak. 

The only difference between collodion coated papers and all the others is that during processing the paper may curl slightly. This is because the collodion side will not easily absorb the processing solutions.This effect can be corrected by using solutions slightly warmed or a smaller quantity of solutions in each tray. 

The suction apron comprises an endless rubber belt travelling round a vacuum box. It is perforated and in contact with the uncoated side of the paper web, providing through the coater controlled tension in the substrate (if the paper is pulled only from the wind-up end of the machine, there can be tearing and breaks). The suction apron also helps prevent curling at the edges of the web. 

R. D. Stolow of Tufts University reported that growing crystals of the di-/-butyldimethoxy compound change shape in a dramatic manner thin plates curl and roll up and then uncurl so suddenly that they propel themselves for a distance of several centimeters. If you do not observe this phenomenon during crystallization of a small sample, you may be interested in consulting the papers cited and pooling your sample with others for trial on a large scale. The solvent mixture recommended by the Tufts workers for observation of the phenomenon is 9.7 mL of acetic acid and 1.4 mL of water per gram of product. 

C. Paper jams may occur in both types of printers because the paper may curl around the photosensitive drum. 

Leaves lightly stippled, curled, and dry. Cause Mites. Tap a leaf over a sheet of white paper. Mites will appear on the paper as mo -ing red, green, or yellow specks. Mites are... 

In the absence of interactions, electrons are described by the Dirac equation (1928), which rules out the quantum relativistic motion of an electron in static electric and magnetic fields E= yU and B = curl A (where U and A are the scalar and vectorial potentials, respectively) [43-45]. As the electrons involved in a solid structure are characterized by a small velocity with respect to the light celerity c (v/c 10 ) a 1/c-expansion of the Dirac equation may be achieved. More details are given in a paper published by one of us [46]. At the zeroth order, the Pauli equation (1927), in which the electronic spin contribution appears, is retrieved then conferring to this last one a relativistic origin. At first order the spin-orbit interaction arises and is described by the following Hamiltonian... 

---