(n.) Any small marine gastropod shell of the genus Littorina. The common European species (Littorina littorea), in Europe extensively used as food, has recently become naturalized abundantly on the American coast. See Littorina.
(n.) A trailing herb of the genus Vinca.
Example Sentences:
(1) Catharanthus roseus (periwinkle) produces a wide range of terpenoid indole alkaloids, including several pharmaceutically important compounds, from the intermediate strictosidine.
(2) Degrees I and II ptosis and atrophy of the female breast can definitively be corrected by the modified periwinkle shell operation.
(3) A breeding of this leafhopper was initiated, and we demonstrated that it was able to acquire S. citri from infected periwinkles, multiply the organisms in its body and transmit them to healthy plants.
(4) While their double-shelled relations (clams, mussels, oysters, scallops, etc) specialise in filtering water to remove food particles, and their single-shelled little cousins (periwinkles, whelks, limpets, conches) specialise in, well, adorning a seafood platter, cephalopods (octopus, cuttlefish and squid) specialise in a seriously impressive form of self-defence.
(5) 50% SW acclimated periwinkles show a general pattern of general stress response (decreasing MET and MDR, and increasing ND -Numerical Density of lysosomes- and lysosomal size).
(6) This hybridoma also gave a negative ELISA when tested against sieve tube preparations from periwinkles affected by citrus greening or Spiroplasma citri, but a positive ELISA when tested against phyllody-affected sieve-tube preparations.
(7) A new strain of wound tumor virus (WTV) has been isolated from a periwinkle plant (Catharanthus roseus) that was among several used as bait plants in a blueberry field.
(8) A substance which strongly precipitates human serum proteins is released into the environment by the southern periwinkle, Littorina angulifera.
(9) Reaction mixtures containing primer pair AY18pm yielded a DNA product of 1.6Kbp, when template consisted of DNA extracted from AY MLO- or DAY MLO-infected Catharanthus roseus (periwinkle).
(10) In the synchronous progression of the cell cycle induced by the addition of phosphate or auxin, the active accumulation of periwinkle PCNA mRNA was observed preferentially in the S phase.
(11) A DNA product of 1.0Kbp was obtained with primer pair AY19pm, when template consisted of DNA extracted from C. roseus infected by AY MLO, DAY MLO, or periwinkle little leaf (strain O-1) MLO.
(12) Periwinkle alkaloids in very low concentrations cause an intracytoplasmic sequestration of microtubule protein in the form of symmetrical, microtubular bodies.
(13) After fusion of the immunized spleen cells with myeloma cells, the supernatant fluids of the resulting hybridoma cultures were screened for the presence of antibodies in a differential avidin-biotin enzyme-linked immunosorbent assay (ELISA) using sieve tube preparations from either healthy or infected periwinkles as antigens.
(14) The carcass characteristics and nutritive value of the giant African land snails (A. achatina and A. marginata), the common garden snail (V. quadrata) and periwinkles (P. aurita and T. fuscatus) were assessed.
(15) Southern blot analysis, using plasmids from the severe strain of AY-MLO (SAY-MLO) as the probe, identified at least four plasmids in celery, aster, and periwinkle plants and in Macrosteles severini leafhopper vectors infected with either the dwarf AY-MLO, Tulelake AY-MLO, or SAY-MLO strain.
(16) These results indicate that the induction of mRNA for periwinkle PCNA occurred independently of the initiation of DNA replication, but that synthesis of certain proteins at the G1 phase was required for the induction of periwinkle PCNA mRNA at the S phase.
(17) Expression of mRNA for periwinkle PCNA was undetectable or very weak in quiescent cells, such as phosphate-starved cells, auxin-starved cells and cells in the stationary phase.
(18) Vincristine, other periwinkle alkaloids, and colchicine partially inhibit the energy dependent transport of alpha-aminoisobutyric acid in Ehrlich ascites tumor cells.
(19) Treatment for 28 days with preparations of burdock (Arctium lappa), cashew (Anacardium occidentale), dandelion (Taraxacum officinale), elder (Sambucus nigra), fenugreek (Trigonella foenum-graecum), guayusa (Ilex guayusa), hop (Humulus lupulus), nettle (Urtica dioica), cultivated mushroom (Agaricus bisporus), periwinkle (Catharanthus roseus), sage (Salvia officinale), and wild carrot (Daucus carrota) did not affect the parameters of glucose homeostasis examined in normal mice (basal plasma glucose and insulin, glucose tolerance, insulin-induced hypoglycaemia and glycated haemoglobin).
(20) DNA amplification by polymerase chain reactions (PCR) was employed to detect host plant infection by several mycoplasmalike organisms (MLOs), including the aster yellows (AY), dwarf aster yellows (DAY), and periwinkle little leaf (0-1) MLOs.