(1) In a debate in the House of Commons, I will ask Britain, the US and other allies to convert generalised offers of help into more practical support with greater air cover, military surveillance and helicopter back-up, to hunt down the terrorists who abducted the girls.
(2) But soon after aid workers departed, barrel bombs dropped by Syrian helicopters caused renewed destruction.
(3) As May delivered her statement in the chamber, police helicopters hovered overhead and a police cordon remained in place around Westminster, but MPs from across the political spectrum were determined to show that they were continuing with business as usual.
(4) Drones and helicopter strikes are not equipped with political night-vision.
(5) Death, helicopter crashes and tears: nurses' career-defining moments Read more Of course, we still continue to accept and treat patients as we always have.
(6) The Duke of Gloucester will go to the British Virgin Islands and Malta, while the Falkland Islands – where Prince William will be serving briefly as a helicopter pilot in the spring – will receive an official visit from the Duke of Kent, who will also go to Uganda.
(7) After arriving by helicopter from the nearby island of Ulleungdo, Lee said that South Korea "must continue to protect its territory".
(8) The six helicopters were donated by the U.S. to help in the war on drugs in Guatemala's territory, local media reported.
(9) Coastguard Mohamed al-Alay said the refugees, carrying official UN refugee agency (UNHCR) documents, were travelling from Yemen to Sudan when they were attacked by an Apache helicopter near the Bab el-Mandeb strait.
(10) Rebels succeeded in hitting one of the helicopters with a Tow missile, forcing it to make an emergency landing.
(11) The purpose of this study was to identify, characterize, and compare the forces generated during patient transport in helicopter and ground ambulances.
(12) A chronology of the disaster, involving two helicopter crashes which left 11 dead, is presented.
(13) He says that two dozen Delta Force commandos, Black Hawk helicopters, drones and fighter jets were involved in the rescue, adding “but we weren’t there”.
(14) This is code for so-called "helicopter drops" of money, in which the Treasury would effectively write cheques to the public.
(15) We examined retrospectively the demographic and clinical factors associated with the collection experience in a series of 288 trauma patients transferred by helicopter from another acute care facility to an inner-city hospital.
(16) Helicopter crews have reported that entire villages have been razed there.
(17) Such an analytical investigation enables the author to conclude that one must admit that helicopter piloting involves a psycho-physical workload certainly no less than that required by more powerful and faster aircraft.
(18) Using automatic and observer-operated equipment for monitoring thermal data, observations have been made during Royal Navy Wessex 5 helicopter operations in a sub-Arctic climate.
(19) The helicopter with Pope Benedict XVI aboard flies past St Peter's Square at the Vatican.
(20) The Egyptian officials told the Associated Press that three helicopters targeted militants in the desert town of Sheik Zuweyid late on Saturday.
Helix
Definition:
(n.) A nonplane curve whose tangents are all equally inclined to a given plane. The common helix is the curve formed by the thread of the ordinary screw. It is distinguished from the spiral, all the convolutions of which are in the plane.
(n.) A caulicule or little volute under the abacus of the Corinthian capital.
(n.) The incurved margin or rim of the external ear. See Illust. of Ear.
(n.) A genus of land snails, including a large number of species.
Example Sentences:
(1) The presence of a few key residues in the amino-terminal alpha-helix of each ligand is sufficient to confer specificity to the interaction.
(2) The elongation of helix III with the addition of helix II at the N-terminus somewhat stabilizes the ordered structure.
(3) The C-terminal sequence contains an amphiphilic alpha-helix of four turns which lies on the surface of the beta-barrel.
(4) The chiral intercalators, at micromolar concentrations, inhibit the reaction of EcoRI, but for each enantiomeric pair it is the lambda enantiomer, which binds only poorly to a B-DNA helix, that inhibits EcoRI preferentially.
(5) The melting profile exhibited two transitions--one at about 35 degrees C and one above 50 degrees C. Our spectral data showed that helices I and II were stable during the first transition, and agreed with other data that helix III was the most likely helix to have melted.
(6) The helix axes, penetrating the hydrophobic region of the bilayers, were oriented neither parallel nor perpendicular to the membrane normal.
(7) The structure of the Z-helix antigen was confirmed by circular dichroism (CD) and U.V.
(8) Conformational predictions based on these sequences confirm their structural homology and indicate the probable existence of two beta-turns, one beta-chain and a long alpha-helix in them.
(9) The nogalose and aminoglucose sugars lie in the minor and major grooves, respectively, of the distorted B-DNA double helix.
(10) The latter, which is external and solvent accessible, is associated with a distortion in the alpha-helix centered around Tyr33 which consists of a significant increase in the CO(i-4)-N(i) and CO(i-4)-NH(i) distances relative to those in the rest of the helix, as well as a significant departure in the phi, psi angles of Tyr33 relative to regular helical geometry.
(11) The AFB1 moiety is face-stacked in the major groove with its long axis approximately perpendicular to the helix axis.
(12) MP8 also was conformed as an alpha-helix, but was amphipatic in the sense that the N-terminal half of the molecule was hydrophilic and the C-terminal half hydrophobic.
(13) A lectin, Helix pomatia agglutinin (HPA), was planted at the surface of rat GEN by the perfusion of the isolated left kidney with neuraminidase (NRD) and HPA.
(14) As a basis for the discussion a possible structure for the DNA complex of the phenylated neutral red is considered in which the extra phenyl ring at N-5 of the phenazinium system, protrudes into the large groove of the DNA helix while the tricyclic part of the ligand is inserted between the DNA base-pairs.
(15) The opsin mutations included reversal of a charged pair conserved in all G protein-coupled receptors at the cytoplasmic border of the third transmembrane helix (mutant CD1), replacement of 13 amino acids in the second cytoplasmic loop (mutant CD2), and deletion of 13 amino acids from the third cytoplasmic loop (mutant EF1).
(16) The remaining 26 independently isolated second-site suppressor mutations all mapped within the amino-terminal DNA binding domain of LexA, at positions 22 (situated in the turn between helix 1 and helix 2) and positions 57, 59, 62, 71 and 73.
(17) In subsequent steps, unassociated Y' directs the synthesis of the complementary oligopurine (R') strand forming a new double helix Y'R' that may direct the synthesis of an oligopyrimidine strand, Y, that is expected to be identical to the first strand that started the whole sequence.
(18) Z-DNA antigen was prepared against poly(dG-dC).poly(dG-dC), which had been converted to the Z-helix conformation in high salt and then stabilized by bromination.
(19) Incubation and heating of the polymers in 1 mM Mn2+ caused the spectral shift reported for the left-handed Z-DNA conformation in the alternating copolymer and the change reported for the triple helix in the homopolymer.
(20) To investigate the ability of a protein to accommodate potentially destabilizing amino acid substitutions, and also to investigate the steric requirements for catalysis, proline was substituted at different sites within the long alpha-helix that connects the amino-terminal and carboxyl-terminal domains of T4 lysozyme.