(a.) Pertaining to water; growing in water; living in, swimming in, or frequenting the margins of waters; as, aquatic plants and fowls.
(n.) An aquatic animal or plant.
(n.) Sports or exercises practiced in or on the water.
Example Sentences:
(1) In a number of bacteriological drinking water analyses, this property was confirmed insofar as aquatic myxobacteria could regularly be demonstrated when inspecting hygienically deficient wells or springs.
(2) While the combined O2 uptake changed by a factor of 2, within the weight range under study, the aquatic O2 uptake changed 8-fold within the same range.
(3) Heavy metals are well known pollutants in the aquatic environment.
(4) In contrast to widespread distribution of PCBs in the environment, PCT residues were seldom found in samples from aquatic environments such as water and sludge and waterfowl and fish, and, if found, the levels of PCTs were so low as to be practically negligible.
(5) Neither the stock cultures nor the aquatic strains were capable of growth in autoclaved river water taken above the sewage outfall at the three temperatures tested.
(6) Hydrotherapy is based on several important bioengineering principles that permit the design and development of aquatic exercise devices, techniques and programs.
(7) Using zoospore capture technique, 361 colonies of aquatic freshwater fungi were recovered from sewage effluents, out of which 341 reached sexual maturity.
(8) Based on this concern, the objectives of this study were to: (1) compile, review, and synthesize literature on the fate, persistence, and environmental concentrations of DFB in both freshwater and saltwater environments; (2) compile, review, and synthesize acute and chronic aquatic toxicity data on DFB effects on freshwater and saltwater organisms; (3) assess possible risk to aquatic biota associated with the use of this insecticide in one specific area (Maryland); and (4) recommend future research based on the data gaps identified from this study.
(9) Monthly mean concentrations of dieldrin in river water and most aquatic organisms were highest in June and July, soon after aldrin had been applied to corn land in the watershed.
(10) Thus, the fern bioassay may be an inexpensive means of detecting both chronic low dose and episodic high dose inputs of mutagenic pollutants into aquatic ecosystems.
(11) Concentration factors of strontium-90 in aquatic organisms and substrates are higher in a dystrophic lake than in the other types.
(12) A minimal kinetic scheme is derived, in which a transient monodentate DNA-platinum(II) adduct is formed in a bimolecular reaction between DNA and aquated platinum(II) compounds.
(13) The substances released by algae in the profundal are taken up by aquatic bacteria which explains the lower release and PER measured.
(14) Eggs contained first-stage larvae in 23-26 days at 25 C. Seven species of aquatic oligochaetes were exposed experimentally to eggs of E. tubifex containing first-stage larvae.
(15) A gas-liquid chromatographic (GLC) method is described for determining residues of Bayer 73 (2-aminoethanol salt of 2',5-dichloro-4'-nitrosalicylanilide) in fish muscle, aquatic invertebrates, mud, and water by analyzing for 2-chloro-4-nitroaniline (CNA), a hydrolysis product of Bayer 73.
(16) The oral communications and posters were divided into five subsections, covering systematics at supraspecific, specific and subspecific levels, evolution, and life cycles of parasites with hosts in both aquatic and terrestrial environments.
(17) Their stabilities were studied in water and the influence of chloride anions, pH, temperature and time was discussed and rate constants of the aquation reactions at different conditions were calculated.
(18) Since sediments from the habitats occupied by the fish in this study have been shown to contain multiple hepatocarcinogens, the findings strengthen cumulative evidence that English sole are useful as indicators of exposure to hepatocarcinogens in aquatic environments.
(19) Aquatic plants are notoriously difficult to study systematically due to convergent evolution and reductionary processes that result in confusing arrays of morphological features.
(20) Tryptic peptide comparisons of 125I-labeled virion proteins showed that five viruses are different from each other, although there was considerable overlap in the peptide maps of the three aquatic viruses, indicting a degree of relatedness.
Duckweed
Definition:
(n.) A genus (Lemna) of small plants, seen floating in great quantity on the surface of stagnant pools fresh water, and supposed to furnish food for ducks; -- called also duckmeat.
Example Sentences:
(1) Duckweed commonly refers to a group of floating, flowering plants of the family Lemnaceae.
(2) Evidence for the sequence of duckweed (Lemna minor) chloroplast 5S rRNA was derived from the analysis of partial and complete enzymic digests of the 32P-labelled molecule.
(3) Growth inhibition of duckweed could be achieved at approx 20 ppb terbutryne in steady state.
(4) The period of the circadian rhythm of uptake of K+ by Lemna gibba strain G3 (duckweed), cultured in a flow medium, was shortened by continuous application of 0.5 mM tetraethylammonium chloride (TEA), which functions as a K+ channel blocker in both animal and plant cells.
(5) Spirodela (Duckweed) was thus used to ascertain the response of the nucleocytoplasmic (nc) and plastid ribosomal RNA metabolisms to partial and total carbon deprivation.
(6) The possible sequence of the chloroplast 5S rRNA from three other flowering plants was deduced by complete digestion with T1 ribonuclease and comparison of the sequences of the oligonucleotide products with homologous sequences in the duckweed 5S rRNA.
(7) Many duckweed species have been studied, primarily of the Lemna and Spirodela genera.
(8) Radioactivity from d-[l-(14)C]glucosamine is incorporated into ethanol-insoluble compounds of high molecular weight in a number of plant tissues, including roots of corn (Zea mays), callus cells of sycamore (Acer pseudoplatanus), axenic cultures of duckweed (Lemna minor) and germinating seedlings of corn, broad bean (Vicia faba) and barley (Hordeum vulgare).
(9) Duckweed and algae represent different levels of complexity in the plant kingdom.
(10) Values for the half-life of Lemna minor (duckweed) protein determined by the new method are compared with values obtained by other methods.
(11) Herbicidal effectiveness of terbutryne-EVA formulation has been investigated in a laboratory-scale simulated flow system device with duckweed plants (Lemna minor) as test organism.
(12) Thus the specific activity of the duckweed enzyme is more than two orders of magnitude higher than that of the enzyme from rat testes.
(13) In the short, single-screen film Lock Again, there is a marvellous sequence in which two young men in sailor's uniforms - both of whom look as if they have been in a fight - ferry an imperious girl across a pond thick with duckweed in a rowing boat.
(14) A new method is described for measuring environmental stress through the use of the duckweed (Lemna minor) rhizosphere.
(15) Differences in duckweed test methodology occur with regard to test types, test vessels, control tests, nutrient media, end points, and applications.
(16) Other studies, however, indicate that duckweed plants are as sensitive to toxicity as other aquatic species.
(17) Duckweed (Spirodela oligorrhiza, Kurz) is a sensitive indicator of 1,1'-alkyl-4,4'-bipyridylium salt (viologen) herbicidal potency.
(18) Duckweed plants are fast growing and widely distributed.
(19) Orellanine, a toxic principle of Cortinarius orellanus Fr., efficiently inhibited the photosynthetic activity of duckweed, Lemna minor L., at a concentration of 0.4 mM.
(20) The present paper deals with the separation of cells from soluble compounds of blood by means of exclusion chromatography using a recently described vesicular packing material made from the cell wall framework of the small duckweed Wolffia arrhiza.