crystal structure

Listing 1 - 10 from 42 for crystal structure

MIT Department of Chemistry
... the Drennan Group has solved the X-ray crystal structure of the metal-responsive transcription factor NikR in complex with its operator DNA. The structure, published in PNAS on August 31, 2006, shows ... apo and nickel-activated NikR determined previously by the Drennan Group, the NikR-DNA complex structure provides a new model system for the study of ligand-activated transcription factors. Chemistry ...
web.mit.edu

LaMarco/Regulation of Gene Expression
... presence of GABP[alpha], GABP[beta], too, makes contact with DNA. Recently, the three-dimensional crystal structure of the GABP complex was determined (see references below). http://www.gene.com/webx ... complex contains two of each of four types of histone proteins) to form a structure called a nucleosome. One important consideration is how transcriptional regulatory proteins contend with the ...
www.accessexcellence.org

Annealing Copper Wire for Bonsai Use
... and gold among others have the same crystal structure. Bending a copper wire work hardens it which introduces defects known as dislocations into the structure. These defects interfere with further deformation and ... various reasons - oxidation being the most obvious. The copper will maintain it's soft crystal structure after annealing at any realistic cooling rate (from very slow like letting fire die ...
www.evergreengardenworks.com

Copper and Aluminum Wire
... . Crystal structure - an orderly arrangement of the atoms. Phase - region of the same crystal structure and chemical composition. Dislocation - a type of disruption that allows different parts of the crystal to ... face centered cubic (FCC) crystal structure at room temperature and a body centered cubic (BCC) crystal at high temperature. Carbon dissolves better in the BCC structure and it takes time ...
www.evergreengardenworks.com More from this site

Maryland Geological Survey: A Geologic Walking Tour of Building Stones of Downtown Baltimore, Maryland
... of the building is faced with the same granite (Figure 2a). Observe the color and crystal size of each mineral. The granite, quarried in Alicante, Spain, was formed during the Precambrian ... . The different colors can be due to variations in a mineral’s chemistry, defects in crystal structure, or the presence of an impurity. For example, iron oxide can be an impurity that ...
www.mgs.md.gov

Angiosperm Families - Aralidiaceae Philipson and Stone
... spread). Lamina margins coarsely dentate, or entire; flat. General anatomy. Plants with ‘crystal sand’ (in epidermal and subepidermal leaf tissues, and in the stem). Leaf anatomy. ... micropylar end. Physiology, biochemistry. Iridoids detected; ‘Route I’ type (cf. Griselinia in structure). Arthroquinones not detected. Verbascosides detected (caffeic acid and unidentified derivatives — Bate-Smith ...
delta-intkey.com

Lab Manual Exercise # 1a
... of the mitochondria where electrons flow along the cytochrome enzyme system. See The Structure Of A Mitochondrion Chloroplast: Membrane-bound organelle and the site of photosynthesis and ... In allergic reactions, sensitized mast cells release stinging histamines into the afflicted tissues. Druse Crystal Inside Cell Of Basswood Nutritious Wolffia Gourmet Dishes Mast Cells In Allergic Reactions ...
waynesword.palomar.edu

What Happens to Roses in Winter Care of Roses
... often find when we prune. To prepare for freezing temperatures, plant cells have developed a structure that compensates. In a normal winter, the exterior of a cane would freeze first, with ... temperatures: dehydration if enough sugars are not present to retain a liquid "antifreeze"; and ice crystal damage if water dilutes the "antifreeze" enough to raise its freezing temperature. When spring returns ...
www.ars.org

Maryland Geological Survey: Crystal Grottoes, Washington County
... the owner and operator of Crystal Grottoes. Address: 19821 Shepherdstown Pike, Boonsboro, MD 21713. History: Crystal Grottoes, the only commercial cave now ... house was originally a wooden structure. It was replaced in 1942 by the modern stone structure. Geology: Crystal Grottoes is developed on ... of the carbonates. It is porous and retains the structure of the original beds. When dry it is quite ...
www.mgs.md.gov

Lab I - Plant Structure (4)
... Lab I - Plant Structure (4) Questions for Further Thought These questions encourage you to think in more detail about ... the process of bubbles forming in xylem. When such bubbles form (say by an ice crystal shrinking as it thaws to liquid), they break the continuous chain of water molecules from ...
www.ucmp.berkeley.edu

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