(n.) A transparent body found in the chromatophores of certain Infusoria.
Example Sentences:
(1) Immunoelectron microscopy shows that ubiquitin is located in the chloroplast, nucleus, cytoplasm, pyrenoid and on the plasma membrane.
(2) Where dilute the Fe-propionocarmine enhances nuclear staining without staining orthe organelles; where more concentration it also stains the nucleolus, spindle, spindle polar bodies, pyrenoid and protoplast.
(3) Similar results were obtained after chronic exposure to 4.9 x 10(-4) microM copper with the relative volume of the pyrenoid being 28% smaller than the controls.
(4) The presence of ribose-5-phosphate isomerase and ribulose-5-phosphate kinase activities was also noted in pyrenoid preparations.
(5) TMF-II consists mostly of thylakoid membranes still partially organized in grana; it contains also fragments of chloroplast envelope, pyrenoid tubules, and starch granules; thus it amounts to a fraction of chloroplast fragments which have lost practically all matrix components.
(6) The pyrenoid, when present, protrudes from the chloroplast, is also surrounded by the two chloroplast envelopes, and, in addition, is capped by a third dilated envelope or "pyrenoid sac."
(7) Both pyrenoids and fraction I protein are localized in the chloroplast, and both have two principal protein components.
(8) The English symbionts had a pyrenoid, compact chloroplast membranes and vesiculated polyphosphate bodies.
(9) Cells grown phototrophically without acetate possess more chloroplast ribosomes and have more normal membrane and pyrenoid organization.
(10) Cells grown mixotrophically in the presence of acetate have a highly disordered chloroplast membrane organization and usually lack pyrenoids.
(11) Statistical analysis of radioautographic grain distribution and measurements of different structural parameters indicate that (a) the chloroplast volume and surface remain constant during the process, whereas the growth of the photosynthetic lamellae parallels the increase in chlorophyll; (b) the lamellae do not develop from the chloroplast envelope or from the tubular system of the pyrenoid; (c) all the lamellae grow by incorporation of new material within preexisting structures; (d) different types of lamellae grow at different rates.
(12) For isolation of the nucleomorph, cells were slightly fixed with glutardialdehyde and thereafter, lysed by treatment with proteinase K and Triton X-100, leaving an intact nucleomorph-pyrenoid complex.
(13) The pyrenoid was found to contain a high specific activity of ribulose-1,5-diphosphate carboxylase which is the same enzymatic activity exhibited by fraction I protein.
(14) It is suggested that the pyrenoid contains fraction I protein and possibly other enzymes of the Calvin-Bassham carbon dioxide fixing pathway.
(15) Cytokinesis is accomplished by an annular median constriction causing the gradual separation of the chloroplast, pyrenoid, and other cell organelles, resulting in two equal daughter cells.
(16) In contrast, the relative volume of their pyrenoids decreased by 41.46%.
(17) Mixotrophic ac-20 cells are also characterized by low rates of photosynthetic electron transport, disorganized chloroplast membranes, and a small pyrenoid.
(18) The molecular weights and relative ratio of the two pyrenoid components are very similar to those of the two components of fraction I protein.
(19) In addition, the pyrenoid in synchronized cells has a transient existence, being present only in the first half of the light period.
(20) The ultraviolet absorption spectrum of sodium dodecyl sulfate (SDS) extracts of pyrenoids showed a single peak at a wavelength of 277 nm, indicating the presence of protein and the probable absence of nucleic acid.
Responsible
Definition:
(a.) Liable to respond; likely to be called upon to answer; accountable; answerable; amenable; as, a guardian is responsible to the court for his conduct in the office.
(a.) Able to respond or answer for one's conduct and obligations; trustworthy, financially or otherwise; as, to have a responsible man for surety.
(a.) Involving responsibility; involving a degree of accountability on the part of the person concerned; as, a responsible office.
Example Sentences:
(1) Intestinal dilatation seemed in all cases a response to elevated CO2 only.
(2) Direct fetal digitalization led to a reduction in umbilical artery resistance, a decline in the abdominal circumference from 20.3 to 17.8 cm, and resolution of the ascites within 72 h. Despite this dramatic response to therapy, fetal death occurred on day 5 of treatment.
(3) Furthermore, it had early diagnostic (seven days) as well as prognostic value, as revealed by response to therapy and decrease in COA titer.
(4) Patients with papillary carcinoma with a good cell-mediated immune response occurred with much lower infiltration of the tumor boundary with lymphocyte whereas the follicular carcinoma less cell-mediated immunity was associated with dense lymphocytic infiltration, suggesting the biological relevance of lymphocytic infiltration may be different for the two histologic variants.
(5) Age difference did not affect the mean dose-effect response.
(6) These channels may, at least in some cases, be responsible for the generation of pacemaker depolarizations, thereby regulating firing behaviour.
(7) Oxyhaemoglobin (4 microns at 0.35 ml.min-1) infused into the tracheal circulation almost abolished the responses to bradykinin and methacholine.
(8) Three categories of UV response have been identified.
(9) LHRH therapy leads to higher plasma LH levels and a lower FSH in response to an intravenous LHRH test.
(10) Bronchial challenge caused an immediate asthmatic response.
(11) Clinical signs of disease developed as early as 15 days after transition to the experimental diets and included impaired vision, decreased response to external stimuli, and abnormal gait.
(12) The telencephalic proliferative response has been studied in adult newts after lesion on the central nervous system.
(13) The combined immediate and delayed responses to fleas in the dog are as observed by other investigators in man and guinea pigs.
(14) In addition, this pretreatment protocol did not modify the recipient immune response against B-lymphocyte alloantigens which developed in unsuccessful transplants.
(15) In dogs, cibenzoline given i.v., had no effects on the slow response systems, probably because of sympathetic nervous system intervention since the class 4 effects of cibenzoline appeared after beta-adrenoceptor blockade.
(16) As a consequence, similar response curves were obtained for urine specimens containing morphine or barbiturates.
(17) At the early phase of the sensitization a T-cell response was seen in vitro, characterized by an increased spleen but no peripheral blood lymphocyte reactivity to T-cell mitogens at the same time as increased reactivity to the sensitizing antigen was detected.
(18) The ability of azelastine to influence antigen-induced contractile responses (Schultz-Dale phenomenon) in isolated tracheal segments of the guinea-pig was investigated and compared with selected antiallergic drugs and inhibitors of arachidonic acid metabolism.
(19) With aging, the blood vessel wall becomes hyperreactive--presumably because of an augmented vasoconstrictor and a reduced vasodilator responsiveness.
(20) Treatment termination due to lack of efficacy or combined insufficient therapeutic response and toxicity proved to be influenced by the initial disease activity and by the rank order of prescription.