(n.) An ultimate particle of matter not necessarily indivisible; a molecule.
(n.) A constituent particle of matter, or a molecule supposed to be made up of subordinate particles.
(n.) The smallest particle of matter that can enter into combination; one of the elementary constituents of a molecule.
(n.) Anything extremely small; a particle; a whit.
(v. t.) To reduce to atoms.
Example Sentences:
(1) It has been conformed that catalase from bovine liver eliminates only the pro R hydrogen atom from ethanol.
(2) The results demonstrated that K2PtCl4 was bound to a greater degree than CDDP in this system with 3-5 and 1-2 platinum atoms respectively, bound per transferrin molecule.
(3) Richard Bull Woodbridge, Suffolk • Why does Britain need Chinese money to build a new atomic generator ( Letters , 20 October)?
(4) The bond distances of Cu to Cl(1), Cl(2), N(3) and N(3') atoms are 2.299 (1), 2.267 (1), 1.985 (4) and 1.996 (3) A, respectively.
(5) The common atoms of the [3Fe-4S] and [4Fe-4S] cores agree within 0.1 A; the three common cysteinyl S gamma ligand atoms agree within 0.25 A.
(6) This result was confirmed by atomic absorption spectroscopy, which indicated a stoicheiometry for copper and manganese of approx.
(7) The inter-molecular similarity measure used is the number of atoms in the 3-D common substructure (CS) between the two molecules which are being compared.
(8) The risks are determined, mainly by expert committees, from the steadily growing information on exposed human populations, especially the survivors of the atomic bombs dropped in Japan in 1945.
(9) All N and O atoms except N(3) and O(4') participate in a three-dimensional hydrogen-bonding system.
(10) This suggestion is supported by EPR studies, which show that the iron atoms in Fe(III)L-globin are in two low electronic states.
(11) The molar refractivity has been shown to be a superior parameter for the description of the activity of sulphonamides than the sum of electronegativities of atoms making up a heterocyclic substituent in the sulphonamide molecule and molecular weight of the substituent.
(12) Binding to HSA occurs primarily with the imidazolidine and thiazolidine groups of levamisole as it has been demonstrated by selective changes in the relaxation times and the chemical shifts of the protons attached to the carbon atoms.
(13) Each repeat unit contains thirty amino acids and is thought to bind a zinc atom using two cysteines and two histidines as ligands.
(14) NADP+ bound at the C8 atom in the adenine moiety proved to be the most efficient ligand whereas that bound at the C3 atom of the ribose moiety was relatively inefficient.
(15) This structure is further characterized by approaches of both the carbonyl and the furan O atoms to ring H atoms with separations which are slightly less than the sum of the relevant van der Waals radii.
(16) The magnitude of improvement achieved is dependent upon field size, SSD, the atomic number of the foil material, and foil thickness.
(17) For the liver enzyme, the logarithm of the inhibition constant was linearly related to the number of carbon atoms in the saturated fatty acids whereas the muscle enzyme, which was generally more strongly inhibited, showed a nonlinear dependence.
(18) Results obtained from a such study are here compared with levels obtained from a comparative determination of the metals in the mosses by three other techniques: Differential pulse anodic stripping voltammetry (DPASV), Direct current plasma (atomic emission) spectroscopy (DCPS) and X-ray fluorescence (XRF) spectroscopy.
(19) It was hypothesized that the observed activity variation of the paracetamol analogues was based on the relative abilities of these compounds to undergo H atom loss at the phenolic oxygen, and on the relative stabilities of the resulting free-radical species.
(20) The resulting family of structures has a mean backbone rmsd of 0.63 A (N, C alpha, C', O atoms), excluding the segments containing residues 45-59 and 84-88.
Crystallography
Definition:
(n.) The doctrine or science of crystallization, teaching the system of forms among crystals, their structure, and their methods of formation.
(n.) A discourse or treatise on crystallization.
Example Sentences:
(1) The amino acid sequence deduced from the open reading frame of the E-type cDNA agreed with the amino acid sequence of the E isoenzyme determined by protein sequencing and x-ray crystallography.
(2) A tertiary-structure model of the active site of this ribozyme has been constructed based on comparative sequence analysis of related group I intervening sequences, data on the accessibility of each nucleotide to chemical and enzymatic probes, and principles of RNA folding derived from a consideration of the structure of tRNA determined by x-ray crystallography.
(3) The structure of asperlicin has been determined by NMR and mass spectral analysis, and X-ray crystallography.
(4) The location of the metal and carbohydrate binding sites, established unequivocally in concanavalin A by high resolution X-ray crystallography, appears to be the same in the other legume lectins.
(5) Five of these 15 protons reside on residues that are found within the epitope as defined by X-ray crystallography.
(6) Specific ion ratios were correlated with crystallography and ultrastructure.
(7) This arrangement is consistent with that of ADP-ribose and zinc in the crystalline complex of liver alcohol dehydrogenase as determined by X-ray crystallography (Branden et al., (1973), Proc.
(8) Molecular structures of three triazenes have been determined using X-ray crystallography.
(9) The delineation of epitopes can be achieved by antigenic cross-reactivity studies or by X-ray crystallography.
(10) The structure of the antimetabolite was finally established to be 7-hydroxyguanine by X-ray crystallography.
(11) The orientations of the porphyrin normals in these deoxy Fe-Co hybrid hemoglobins in terms of the g parallel signals, were closely coincident with those of the heme normals of deoxyhemoglobin determined by x-ray crystallography.
(12) Single molecules of glycogen phosphorylase b exhibit images in the electron microscope which are similar in shape and dimension to those derived from X-ray crystallography.
(13) The structures and absolute configuration of two unique alkaloids isolated from the Colombian frog, Dendrobates histrionicus, have been elucidated by Roentgen-ray (x-ray) crystallography.
(14) We support earlier findings of a greater degree of beta-sheet structure in solution than has been reported by X-ray crystallography and, importantly, the invariant residue associated with neurotoxicity, Trp29, is shown to be in a similar environment to that found in alpha-cobratoxin and LS III from Laticauda semifasciata.
(15) The overall structure, which is almost identical to that found by X-ray crystallography, is disc shaped and consists of a central four component mixed parallel and antiparallel beta-sheet flanked by a 13 residue alpha-helix on one side and the reactive site loop on the other.
(16) The three-dimensional structure of the Bowman-Birk type proteinase inhibitor (PI-II) has been determined by x-ray crystallography and refined at 2.5-A resolution.
(17) (The X-ray crystallography was performed by Kamphuis et al.
(18) The carbon-13 NMR results support previous investigations by halide ion NMR and x-ray crystallography.
(19) Another logical step in their study will be to examine polyhedrin quaternary structure utilizing X-ray crystallography.
(20) By combining the structural data from X-ray crystallography, and the functional data from site-specific mutagenesis a model is proposed for homotropic cooperativity in aspartate transcarbamoylase that suggests that the allosteric transition occurs in a concerted fashion.