(n.) An ament; a species of inflorescence, consisting of a slender axis with many unisexual apetalous flowers along its sides, as in the willow and poplar, and (as to the staminate flowers) in the chestnut, oak, hickory, etc. -- so called from its resemblance to a cat's tail. See Illust. of Ament.
Example Sentences:
(1) The extracts with the broadest spectra of activity were prepared from: Alnus rubra bark and catkins, Fragaria chiloensis leaves, Moneses uniflora aerial parts, and Rhus glabra branches.
(2) Dot immunoblotting of crude extracts of various aerial parts of birch trees, using patient serum rich in birch pollen IgE, showed IgE-binding activity in leaves, buds, twigs, seeds, bark, and old male catkins.
(3) Ginger, pippali (native to India; also called dried catkins), pepper, and garlic showed the highest activity followed by asafetida, mustard, and horse-gram (native to India).
(4) The current 2012 edition maintained the changes, and instead of catkin, cauliflower, chestnut and clover, today’s edition of the dictionary, which is aimed at seven-year-olds starting Key Stage Two, features cut and paste, broadband and analogue.
(5) Hazel catkins were profuse, catching out hay fever sufferers late in the month.
(6) • Hazel catkins, which usually appear in March and April, appeared early in autumn at Washington Old Hall, Tyne and Wear, for the second year running • Mammals generally entered the winter in good condition, especially badgers, wild deer, and the wild sheep and goats in Cheddar Gorge.
(7) You can also lobby your local council to get trees planted that are bee-friendly, such as hazel and alder whose catkins provide a vital source of pollen in the spring, when the bees need this protein to feed to their young, expanding colony.
(8) Mica flecks in ancient granite shone like gold dust in caramel-coloured streams, beech trees were decorated with delicately suspended catkins and the upland breezes infused with coconut-like scent from early flowering gorse.
Raceme
Definition:
(n.) A flower cluster with an elongated axis and many one-flowered lateral pedicels, as in the currant and chokecherry.
Example Sentences:
(1) These results indicate that both racemic and L-baclofen inhibit trigeminal transmission in man, probably because they interfere with excitatory transmission through the interneurons of the lateral reticular formation.
(2) In contrast to the enantiomeric discrimination observed with racemic amine, the individual isomers were metabolized at approximately the same rate.
(3) Routine enantiomeric analyses were successfully carried out on samples taken from animals dosed orally with the racemic drugs, providing important data on the possible levels of exposure to individual enantiomers during toxicity testing.
(4) Racemic verapamil and the L- and D-isomer increased cellular vincristine accumulation to the same extent.
(5) By this method, about 5.0 mg of racemic HCZ could be resolved completely in one run.
(6) The racemization-suppressing effect of other compounds were also evaluated by employing one of these model couplings to be at best only limitedly effective.
(7) The antihypertensive and pulse-slowing effects of racemic propranolol, oxprenolol, pindolol, practolol and d-propranolol were assessed in 54 hypertensive patients.
(8) The assay is reliable to 0.1% racemate with a detection limit of approximately 100 pmol.
(9) The allene oxide also opens to a zwitterion, which undergoes charge delocalization to form a planar intermediate; this structure is the achiral precursor of the stable end product of pericyclic ring closure, viz., racemic cis-12-oxo-PDA.
(10) Decreasing the water concentration in the reaction medium by adding methanol at 0 degrees C drastically reduces the rate of racemization without affecting the rate of transamination.
(11) Racemization of aspartic acid in dentin protein during the human lifetime progresses with age.
(12) Five diammine-Pt(II) or Pt(IV) coordination compounds, namely cis-diammine-dichloro-platinum (II) "cis-DDP", transdihydroxy-cis-diammine-dichloro-platinum (IV) "trans-ODDP", and derived substitution products of lactic acid (racemates or L-forms) with diminished toxicity in comparison to cis-DDP have been tested against mouse leukemia P388, and partly on melanoma B16 for antineoplastic activity.
(13) The racemic drug has unusual pharmacokinetic properties because of its concentration-dependent binding to plasma proteins in the therapeutic plasma concentration range.
(14) The vasodilating potency of d-alprenolol and d-propranolol was not significantly different from that of the respective racemic mixtures.
(15) High-pressure liquid chromatographic (HPLC) methods have been developed for the determination of drug content, racemate A and related compounds in nadolol raw materials.
(16) The effects of the d- and l-isomers of pentazocine were compared to that of racemic pentazocine on contractions of the mouse isolated vas deferens.
(17) Our results indicate that racemic EM 12 as well as its enantiomers are chemically and metabolically more stable than thalidomide; however, extensive racemisation occurs both in vivo and in vitro.
(18) These data, coupled with the equilibrium fractionation factor for the 2-position of proline (which has been determined to be 1.17), provide the transition-state factors for each of the in-flight protons, and delineate the nature of the transition state(s) for the enzyme-catalyzed racemization.
(19) Consequently, racemic compounds showed approximately half potency of the corresponding enantiomers.
(20) S(+)-ibuprofen and R(-)-ibuprofen given alone more rapidly reached significantly higher maximal plasma concentrations than after the same doses of the racemic compound.