(n.) An animal, invisible, or nearly so, to the naked eye. See Infusoria.
(n.) A small animal, as a fly, spider, etc.
Example Sentences:
(1) It is particularly appropriate for an assemblage of protozoologists to pay homage to this intrepid "philosopher in little things," a man with an insatiable curiosity about his wee animalcules, on the tricentenary of his discovery of them, since it was an event of such long-lasting significance.
Stentor
Definition:
(n.) A herald, in the Iliad, who had a very loud voice; hence, any person having a powerful voice.
(n.) Any species of ciliated Infusoria belonging to the genus Stentor and allied genera, common in fresh water. The stentors have a bell-shaped, or cornucopia-like, body with a circle of cilia around the spiral terminal disk. See Illust. under Heterotricha.
(n.) A howling monkey, or howler.
Example Sentences:
(1) Vance Tartar, although he worked with a genetically undomesticated organism (Stentor coeruleus), provided early evidence for the crucial role of clonally propagated features of the cell cortex.
(2) The response of Stentor to changes in the divalent cation concentrations in this solution suggests that Ca(+2) and Mg(+2) are physiologically important in the regulation of ciliate contractility.
(3) The generation of motive force for changes in cell length in Stentor resides in two distinct longitudinal cortical fiber systems, the km fibers and myonemes.
(4) The community of ciliates could be divided in three groups: aerobic, cosmopolitan, genera such as Stentor and Vorticella, in the epilimnion; a large population (up to 10(4) ind ml-1) of Coleps, adapted to low concentrations of both oxygen and sulfide, together with a few individuals of the equally sulfide-tolerant genus Paramecium, in the metalimnion, and anaerobic, true sulfide-loving genera such as Plagiopyla and Metopus, in the hypolimnion, where sulfide concentration was between 0.6 and 1.2 mM.
(5) In Stentor coeruleus growth of new, daughter ciliates and experimentaly inducled regeneration of oral membranellar cilia are reversibly inhibited by low, nontoxic concentrations of colchicine.
(6) The both types of photoresponses in Stentor are greatly affected by the Ja-value.
(7) The structural basis for the function of microtubules and filaments in cell body contractility in the ciliate Stentor coeruleus was investigated.
(8) Stentorin serves as the photoreceptor for the photophobic and negative phototactic responses in Stentor coeruleus.
(9) Stentors are more sensitive to far UV-induced delay of oral regeneration following bleaching of their UV-absorbant cortical pigment granules.
(10) In the ciliate Stentor, many thousands of basal bodies assemble on the ventral cell surface to form a new oral apparatus during cell division, regeneration and reorganization (oral replacement during interphase).
(11) With increasing calcium concentration but at a constant Ja-value, the number of Stentor showing the step-up photophobic response increased, whereas the phototactic orientation response of Stentor was suppressed at higher Ca2+ concentrations.
(12) In cell grafts, Stentor macronuclei associated with separate regions of cell surface can be made asynchronous with regard to morphology and DNA synthesis even though they demonstrably share a common endoplasm.
(13) The convoluted M bands of the protozoan Stentor coeruleus straighten before the animal contracts.
(14) Stentor incubated in media containing radioactively labelled TC (TC*) retain TC* after extensive washing despite a rather high apparent KD (19.7 mumol l-1).
(15) This is the only type of cortical organelles the karyorelictids share with other ciliates, namely, the Heterotrichida (Stentor, Blepharisma).
(16) (+)-Tubocurarine (TC) decreases the probability that the protozoan, Stentor coeruleus Ehrenberg, will contract in response to mechanical stimulation, because it selectively depresses mechanoreceptor currents.
(17) To determine whether basal body assembly and oral development are also induced by permanently disconnecting the longitudinal microtubule fibre tracts (mt fibre tracts) of the cell body cortex, I interposed a ring of inverted (heteropolar) cortex between the anterior and posterior halves of interphase stentors.
(18) Cell division in Stentor therefore appears to be initiated by a cortical pattern change resulting from cell surface growth during interphase.
(19) Tartar also hoped to demonstrate the existence of what David Nanney called "cellular architects" by provoking stentors to carry out entirely novel types of morphogenetic performances.
(20) The evidence suggests that the mechanism of this reversal of the effects of colchicine (or Colcemid) is due to a chemical reaction between tris(hydroxymethyl)-aminomethane (or its hydrochloride, or both) and colchicine (or Colcemid), wihich reduces the effective concentration of these mitotic spindle inhibitors reaching the stentors.