(n.) A real or apparent libratory motion, like that of a balance before coming to rest.
Example Sentences:
(1) The simulation reproduces the amplitudes of the fast librational motions of the backbone N-H bonds determined from 15N nuclear magnetic relaxation data, as well as the crystallographic B-factors.
(2) This has provided information on the translational and librational motions of individual groups in the complex.
(3) Above about 52 degrees C cholesterol improves the order by decreasing the amplitude of the librational motions.
(4) In its thermal vibrations, the adenosine molecule behaves as two rigid segments with a torsional libration about the glycosidic bond of 14.4 deg2 at 123 K. The force constant for this libration, as determined from the diffraction data, is 73 (10) J mol-1 deg-2.
(5) In the 1970s, Princeton physicist Gerald K O’Neill envisioned 100,000-person colonies, stationed at what is known as the fifth Lagrangian libration point (L5) in the moon’s orbit – like a gravitational eddy where things stay put by themselves.
(6) The source of the entropic elastomeric force is demonstrated to be the result of internal chain dynamics, and the mechanism is called the librational entropy mechanism of elasticity.
(7) The librational motions are to some extent cooperative.
(8) A translational, librational, and screw analysis of the thermal parameters of endothiapepsin also supports a model in which the two parts can move relative to each other.
(9) Collectively these results suggest that hydrophobic interactions make contributions to elastin entropy at low extensions, but that librational mechanisms make larger contributions to the elastic restoring force at longer extensions.
(10) Many such motions reflect peptide plane librations that result from anticorrelated crankshaft rotations of psi i and phi i+1.
(11) 7 nsec at 40 degrees C) where the band has been assigned to a peptide librational mode.
(12) The amplitude of the base motion, modeled as a fast four-site libration, or diffusion in a cone, increased slightly with higher levels of hydration.
(13) The TLS model has also been applied to the whole protein molecule and shows that the average motion is approximately isotropic with little librational character.
(14) Calculations of the relative statistical weights of these conformations confirm earlier theoretical considerations on the importance of the librational free energy of stable conformations of peptides.
(15) Since the spin-lattice relaxation rate for the active R-state (immobilized) phosphate is similar to that observed in other phosphoenzymes of different size it is suggested that a librational motion on the nanosecond time scale may constitute a common spin-lattice relaxation pathway for phosphates in macromolecules.
(16) The absorption bands of the glycerol ester, phosphoryl, and choline groups were broadened upon hydration, suggesting the activation of the librational or torsional motion.
(17) The similarity of Raman frequencies for B-, A-, C-, and Z-DNA suggests that these modes originate from concerted motions of the bases (librations), which are not strongly dependent upon helix backbone geometry or handedness.
(18) Thus, while the rate of these transitions cannot be quantified, the simulated decay of these correlation functions is completely consistent with the physical picture in which the N-H vectors, in addition to fast librational motion, undergo large amplitude jumps between conformations stabilized by hydrogen bonds.
(19) By analogy this allows for the first assignment of a peptide librational mode in a naturally occurring polypeptide or protein.
(20) The hydrophobic side groups in the protein core show mainly translational motion, with mean-square librations of 20 deg2 which are similar to those found in some close-packed crystals of small organic molecules.
Trepidation
Definition:
(n.) An involuntary trembling, sometimes an effect of paralysis, but usually caused by terror or fear; quaking; quivering.
(n.) Hence, a state of terror or alarm; fear; confusion; fright; as, the men were in great trepidation.
(n.) A libration of the starry sphere in the Ptolemaic system; a motion ascribed to the firmament, to account for certain small changes in the position of the ecliptic and of the stars.
Example Sentences:
(1) Nevertheless, he admits to a degree of trepidation.
(2) In a 2010 essay, Berman wrote of visiting the Bronx again, with trepidation, fearing that the borough's notorious self-immolation would have left nothing of the world he remembered.
(3) Trepidation gave way to further jubilation when Kightly doubled their lead.
(4) I wouldn’t put David Haye in just yet because he achieved more as a cruiserweight.” That’s a handy shopping list of varying talent and, apart from Wilder, the WBC champion with the imposing knockout record but yet to be truly stretched, it is not a field to invite trepidation.
(5) This feeling of trepidation isn't helped when I spot him, standing out a mile among the post-work drinkers and carefully dressed-down new-media types, not just because of his mane of blond hair but because his face is covered in faded bruising and the remains of a black eye.
(6) Did the pair not have any trepidation about mining the Nazis for jokes?
(7) Democrats running for president have traditionally shown “trepidation” about calling for more gun control, notes Matt Schlapp, the chairman of the American Conservative Union.
(8) They used to approach trips to Merseyside with trepidation, but won at Anfield for the first time in 52 years in August.
(9) "Certainly, latent and overt stereotypes, fear or trepidation about others, and even naked racism may have contributed to static levels of interaction and the slow pace at which social bonds are being forged between South Africans of different race groups," the report notes.
(10) Read more The outspoken Joyce – who to the trepidation of many colleagues has been elected leader of the rural-based Nationals party and therefore also becomes deputy prime minister in Malcolm Turnbull’s Coalition government – just got a little more publicity than he was banking on.
(11) In Brussels, the visit will nevertheless be watched with trepidation, for fear the Russians could make Tsipras an offer he cannot refuse.
(12) It’s so important that all views are heard and understood in order for us to learn to trust and respect each other more.” Many synod members were approaching the closed process with trepidation, Broadbent said.
(13) The annual economic update – which also sets out government's plans for managing economic growth, and provides a rough guide to the following spring's budget – is already causing some trepidation for councils.
(14) But for all the complaints about Obama’s healthcare act, one doesn’t have to go far in Northampton County to find someone who loves the law, and views the current Republican effort with trepidation, or worse.
(15) Among those are several of the constituencies where Lib Dems will be looking at any Green bounce with trepidation, such as St Ives and North Cornwall.
(16) The portion of fate that depends on the unknown is called 'douleur', and this must be considered and explored with trepidation."
(17) When she won her party's leadership contest back in March, you could sense two conflicting reactions rippling through the Welsh nationalists' collective psyche: excitement about such a radical politician taking the top job; and from more conservative quarters, a real trepidation about what she might do with her new role.
(18) While trepidation remains, things have changed rapidly.
(19) The agenda is a full one, with the mood one of caution and some trepidation.
(20) On the approach to the national stadium in Saint-Denis, which was the target for three suicide bombers almost exactly seven months ago amid terrorist attacks on the capital that killed 130 people , home fans draped tricolors around their shoulders and donned novelty chicken hats, but the usual celebratory air was undercut by a mix of defiance and trepidation.