What's the difference between pinch and pucker?

Pinch


Definition:

  • (v. t.) To press hard or squeeze between the ends of the fingers, between teeth or claws, or between the jaws of an instrument; to squeeze or compress, as between any two hard bodies.
  • (v. t.) o seize; to grip; to bite; -- said of animals.
  • (v. t.) To plait.
  • (v. t.) Figuratively: To cramp; to straiten; to oppress; to starve; to distress; as, to be pinched for money.
  • (v. t.) To move, as a railroad car, by prying the wheels with a pinch. See Pinch, n., 4.
  • (v. i.) To act with pressing force; to compress; to squeeze; as, the shoe pinches.
  • (v. i.) To take hold; to grip, as a dog does.
  • (v. i.) To spare; to be niggardly; to be covetous.
  • (n.) A close compression, as with the ends of the fingers, or with an instrument; a nip.
  • (n.) As much as may be taken between the finger and thumb; any very small quantity; as, a pinch of snuff.
  • (n.) Pian; pang.
  • (n.) A lever having a projection at one end, acting as a fulcrum, -- used chiefly to roll heavy wheels, etc. Called also pinch bar.

Example Sentences:

  • (1) produced a strong analgesic effect in the formalin test and in the tail pinch test.
  • (2) The observed clinical findings include scarring of the face and hands (83.7%), hyperpigmentation (65%), hypertrichosis (44.8%), pinched facies (40.1%), painless arthritis (70.2%), small hands (66.6%), sensory shading (60.6%), myotonia (37.9%), cogwheeling (41.9%), enlarged thyroid (34.9%), and enlarged liver (4.8%).
  • (3) Results indicate substantial postoperative improvement in tip prehension and grasp, while performance remained essentially unchanged for lateral prehension, pinch force, and power grip.
  • (4) To mimic physiological conditions, synaptosomes, which are pinched off presynaptic nerve termini, were used.
  • (5) Comparison with other pinch strength studies established that although force magnitudes may be strongly influenced by specific experimental conditions, empirical relationships among different pinch forces are fairly stable and predictable.
  • (6) Anyone still imagining that it was only the defender’s recovery from injury rather than his form that was preventing him from starting (and it’s been clear for a while that’s not the case) might have noted the coach’s instructions to Gonzalez to be ready to play a few minutes when needed, either as an extra defender or even in a pinch as an extra forward.
  • (7) He has just performed a skit now about his bicycle scheme, which included a swipe at the French (because their scheme resulted in many more cycles being pinched, apparently.)
  • (8) Other small endocytic vesicles pinch off from the surface, move deeper into the cytoplasm and fuse with the lateral plasmalemma; their protein content is emptied into the intercellular space by exocytosis.
  • (9) It is suggested that the optimal way to diagnose microsporidiosis is by light microscopical examination of duodenal pinch biopsy specimens.
  • (10) Numerous 70-mmicro diameter vesicles apparently pinch off from the Golgi systems, transport this material through the egg, and probably then fuse to form a crenate, membrane-limited yolk droplet.
  • (11) Analysis of the rate of functional recovery as measured by total active motion, gross grip strength, and pinch grip strength showed no significant difference between the two groups.
  • (12) Which is another reason why, independent of talent, an Argentine is more likely to make a successful go of life in Madrid, Milan, Manchester or at a pinch (as with the case of the winger Carlos Marinelli) Middlesbrough.
  • (13) The term "barons" hasn't really had any meaning since the Combination Act of 1799 ; at a pinch 1825 , when the legislation to prevent the activity of unions was passed again, in the Combination of Workmen Act.
  • (14) A temporary pinching off of the spermatic cord was carried out in 100 male Wistar rats in order to evaluate the effect of a limited period of ischaemia on the testicular parenchyma.
  • (15) It involved bringing in Kyle Beckerman alongside Jermaine Jones in the base of midfield and asking Jones to pinch in when necessary and get forward when possible.
  • (16) Neurons were first classified as on-cells if they fired faster during noxious pinch or as off-cells if they fired slower.
  • (17) The pinch technique has been found to be useful in repairing cosmetic eyelid deformities.
  • (18) It is proposed that pinch-induced immobility is mediated by both dopaminergic and cholinergic systems.
  • (19) In this article the concept of utilizing a pinched inlet channel for field-flow fractionation (FFF), in which the channel thickness is reduced over a substantial inlet segment to reduce relaxation effects and avoid stopflow, is evaluated for steric FFF using one conventional channel and two pinched inlet channels.
  • (20) Pharmacological analysis of the involvement of the brain catecholamines in tail-pinch behavior suggests that it is critically dependent on the nigrostriatal dopamine system.

Pucker


Definition:

  • (v. t. & i.) To gather into small folds or wrinkles; to contract into ridges and furrows; to corrugate; -- often with up; as, to pucker up the mouth.
  • (n.) A fold; a wrinkle; a collection of folds.
  • (n.) A state of perplexity or anxiety; confusion; bother; agitation.

Example Sentences:

  • (1) As in the protein sample, a tendency for the cis-proline residues to have the DOWN pucker was observed, but the effect was less pronounced.
  • (2) The ultrastructural findings of the macular pucker removed by vitreoretinal surgery are demonstrated.
  • (3) Sugar puckers and proton distances are very sensitive criteria to monitor molecular dynamics.
  • (4) Intranucleotide proton-proton distances combined with the knowledge of sugar puckers have been used to fix the glycosidic bond torsion angle (chi).
  • (5) High proliferative activities were found in 4 of 5 PVR membranes, in 9 of 14 PDR membranes, in 6 of 11 recurrent membranes after intraocular silicone oil tamponade, and in 2 of 6 macular pucker membranes.
  • (6) No "flips" to the opposite puckering for this ring were found in the simulations starting from the global minimum, although such a transition was observed for a trajectory initiated with one of the higher local minimum energy conformations.
  • (7) Thus, flexibility in psi as well as in omega and omega, and in the sugar pucker is indicated.
  • (8) These facts suggest that astrocytes play an important role in preretinal membrane formation in macular pucker.
  • (9) The free duplex adopts a regular right-handed B-type conformation in which all glycosidic bond angles are anti and all sugar puckers lie in the C2'-endo range.
  • (10) All cases occurred in eyes with existing retinal holes or tears, including eight cases of macular pucker after previous retinal detachment.
  • (11) The conformations of the terminal residues of helix I, which corresponds to bases (-1)-11 and 108-120 of native 5S RNA, are less well-determined, and their sugar puckers are intermediate between C2' and C3'-endo, on average.
  • (12) Different ester substituents affect 1,4-dihydropyridine ring puckering to a small extent in most cases.
  • (13) Scalar couplings from correlated experiments and interproton distances from NOESY experiments at short mixing times have been used to determine glycosidic angles, sugar puckers, and other conformational features.
  • (14) There appeared to be a possibility that this muscular thickening might give rise to the rectosigmoidal mucosal puckering often seen through a sigmoidoscope.
  • (15) Intranucleotide NOEs from the sugar protons H1', H2', and H3' to the base protons were used to determine the conformation of each nucleotide (puckers and glycosidic torsion angles).
  • (16) The most flexible conformational angles in the structure are the glycosidic angle and the sugar pucker.
  • (17) Of these, 89% of the cis-proline residues exhibit the DOWN pucker, while the trans-proline residues, on average, are about evenly distributed between the two forms.
  • (18) The folding of the polynucleotide chain is accomplished either solely by rotations around the P-O bonds or in concert with rotations around the nucleotide C4'-C5' bond with or without changes in the sugar ring pucker.
  • (19) Postoperative proliferative vitreoretinopathy occurred in six eyes (10%) and macular pucker in two (3%).
  • (20) The glycosidic torsional angle, chiCN = -28.4 degrees, is in the anti region; the sugar pucker is C(2')exo-C(3')endo in a nearly pure 32H twist; and the conformation of C(4')-C(5') is gauche-gauche.