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Anhydrous guanine: a synchrotron study
Anhydrous guanine: a synchrotron study

... Very small crystals of anhydrous guanine (systematic name: 2-amino-1,7-dihydro-6H-purin-6-one), C5H5N5O, were obtained from an attempted solvothermal synthesis of a potassium complex. Data were collected at 120 K using a synchrotron radiation source. There is one essentially planar molecule in the a ...
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View - Workshops+SJCOE Workshop Management

... molecules (via chemical bonds), which range in size from two to thousands of atoms (e.g., in biological molecules such as proteins). Atoms also combine due to these forces to form extended structures, such as crystals or metals. The varied properties (e.g., hardness, conductivity) of the materials o ...
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... mining in space microgravity, there are two convection mechanisms that are capable of creating a current in the liquid in which particulates might travel: the Marangoni effect and forced convection. The Marangoni effect, most commonly demonstrated with the “tears of wine” experiment (Matsumoto et al ...
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... Main problem – solve Maxwell's eqns. for medium with periodic, anisotropic, complex dielectric constant assume solutions consistent with Braggs' law obtain solns of waves w/ permitted wave vectors tips of these vectors form dispersion surface dispersion surface used to generate all diffraction effec ...
Birefringence for facetors I : what is birefringence? First published in
Birefringence for facetors I : what is birefringence? First published in

... higher (corresponding to slow propagation) for light polarized in the direction in which charge can move and another , lower, value for light polarized perpendicular to this. These two indices are usually denoted by ne and no , or, in Arem’s book, e and o. If you try to measure the refractive index ...


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... band gaps and they are preferable materials for the lenses and transparent optical coating.[1] The cesium calcium fluoride (CsCaF3) is one of these group members. Belonging to perovskite-type structure, CsCaF3 has attracted attentions of researchers due to the unique luminescence [2] and spectrosco ...
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How Rocks Form 2011
How Rocks Form 2011

... If on the other hand the magma cools close to or at the earth's surface, as for example in the Hawaiian volcanoes, cooling takes place rapidly allowing little time for crystal growth. This type of igneous rock volcanic or extrusive - will be very fine grained. An example is basalt. Although the grai ...
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Unit 3: Properties and States of Matter

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... Closer inspection shows another type of motion, shown in figure 1. The sole effect here is to switch two bonds. If we label the two relevant atoms of the five-membered ring L and M, and if U and V are the two key atoms that are not part of the ring, the sole effect is that bonds LU and MV switch to ...
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Particle Size Enlargement - Systematic Reviews in Pharmacy

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... vinegar and fermented oriental foods . The objective of this course is to make students aware of the basic principles of nutrition. The following categories will be included: Food types; Nutritional needs, the daily energy requirements (RDA); Food labeling and safety; Food groups, food pyramid, exch ...
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Compound Semiconductor Materials and Devices

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... Substituted phases with the composition La5Mo4ⴚxTxO16ⴚ (T ⴝ Co, Fe, Mn, and Mg and x&0.7) were prepared by fusedsalt electrolysis and/or conventional solid-state methods. The crystal structure of the parent compound, La5Mo4O16 , contains perovskite-like corner-sharing MoO6 octahedral units in the a ...
Chapter 23 (Section 3) Pregnancy, Birth, and Childhood
Chapter 23 (Section 3) Pregnancy, Birth, and Childhood

... 3. ______  _____________ unit of an ___________ and maintain the ______________ of that element 4. ____________  ___________ unit of a ___________; maintaining _____________ of the compound 5. ______________  matter that is composed of one kind of ________ (e.g. sulfur [__]; carbon [__]) a. each ...
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Chapter 2 P_ Experimental techniques

... The Vickers Microhardness Tester (supplied by M/s. Cooke Toughton and Simms Ltd., England)[6] was used with the Vickers projection microscope (fig. 9). All the instructions suggested by the supplier were rigidly observed. Since there is no provision for making indentations at high temperature in the ...
Full-Text PDF
Full-Text PDF

... However, the expansion of the photonic band structure to the infrared and visible spectral ranges faced serious technological difficulties. The most convenient technology for the fabrication of 3D photonic crystals for the visible range is the self-assembling growth of colloidal crystal. The well-kn ...
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Colloidal crystal



A colloidal crystal is an ordered array of colloid particles, analogous to a standard crystal whose repeating subunits are atoms or molecules. A natural example of this phenomenon can be found in the gem opal, where spheres of silica assume a close-packed locally periodic structure under moderate compression. Bulk properties of a colloidal crystal depend on composition, particle size, packing arrangement, and degree of regularity. Applications include photonics, materials processing, and the study of self-assembly and phase transitions.
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