(n.) One of the Diatomaceae, a family of minute unicellular Algae having a siliceous covering of great delicacy, each individual multiplying by spontaneous division. By some authors diatoms are called Bacillariae, but this word is not in general use.
(n.) A particle or atom endowed with the vital principle.
Example Sentences:
(1) The cytoplasmic and chloroplast ribosomes from the marine diatom Cylindrotheca fusiformis were isolated and characterized.
(2) The concentration of acetate in the interstitial water fell from about 100 microM (immediately after sedimentation of the spring diatom bloom) to a relatively constant value of about 20 microM in late summer, during which acetate utilization appeared to be balanced by production.
(3) The affinity of the diatom for glucose was greater than that shown by the bacterium, but the Km for glucose transport, 1.5x10-5M was too high to allow effective removal of glucose at in situ concentrations.
(4) We have cloned and sequenced a 5200 base restriction fragment and an overlapping 3100 base fragment of the large single copy region of the chloroplast genome of the diatom Odontella sinensis, which hybridized to several ATPase gene probes.
(5) The material consisted of 285 successive drownings, which were subject to autopsy at the Helsinki University Department of Forensic Medicine between 1978 and 1986 and for whom diatom analysis was carried out.
(6) Substituting size-fractionated silica particles for diatoms (the fossilized cell walls of unicellular algae) allowed for the purification of microgram amounts of genomic DNA, plasmid DNA, and rRNA from cell-rich sources, as exemplified for pathogenic gram-negative bacteria.
(7) In diatom and yeast spindles, elongation of the spindle in anaphase (anaphase B) may be explained by microtubule assembly at polar microtubule ends in the spindle mid-zone and sliding of the antiparallel microtubules from the opposite poles.
(8) Cells of the diatom Cyclotella meneghiniana were exposed in a closed system to 0.245 ppm 1,2,3-trichlorobenzene.
(9) Cells of the diatom Cyclotella meneghiniana were exposed in a closed system to 0.245 ppm 1,3,5-trichlorobenzene.
(10) Extracted diatom DNA separates into two bands in CsCl-Hoechst 33258 dye gradients.
(11) Quinones constituting the electron transfer systems in a marine unicellular diatom, Phaeodactylum tricornutum, were isolated and identified chromatographically.
(12) A new sulfonolipid has been isolated from a non-photosynthetic diatom, Nitzschia alba, by thin-layer and column chromatography on silicic acid, and characterized by 35S-labeling, mobility on thin-layer chromatography, infrared and NMR spectroscopy and products of hydrolysis, as a ceramide sulfonic acid (N-acyl sphingosine-1-sulfonic acid).
(13) Among eukaryotes, red algae emerged first; and, later, thraustochytrids (a Proctista group), ascomycetes (yeast), green plants (green algae and land plants), "yellow algae" (brown algae, diatoms, and chrysophyte algae), basidiomycetes (mushrooms and rusts), slime- and water molds, various protozoans, and animals emerged, approximately in that order.
(14) The spindle of the colonial diatom Fragilaria contains two distinct sets of spindle microtubules (MTs): (a) MTs comprising the central spindle, which is composed of two half-spindles interdigitated to form a region of "overlap"; (b) MTs which radiate laterally from the poles.
(15) The conformation of berchemolide was calculated by MNDO (modified neglect of diatomic overlap).
(16) Usually algal populations change from a dominance of diatoms and green algae to dominance by blue-green algae.
(17) But it seems to have stuck.” The following year, Crutzen and Eugene Stoermer – an American diatom specialist who had been using the term informally since the 1980s – jointly published an article proposing that the Anthropocene should be considered a new Earth epoch, on the grounds that “mankind will remain a major geological force for many millennia, maybe millions of years to come”.
(18) The particles are surfaces for the attachment of diatoms and hydroids.
(19) Mitotic spindles isolated from the diatom Stephanopyxis turris consist of two half-spindles of closely interdigitating microtubules that slide relative to one another in the presence of ATP, reinitiating spindle elongation (anaphase B) in vitro.
(20) We describe here a simple procedure for isolating diatom spindles which are capable of anaphase spindle elongation in vitro.
Seaweed
Definition:
(n.) Popularly, any plant or plants growing in the sea.
(n.) Any marine plant of the class Algae, as kelp, dulse, Fucus, Ulva, etc.
Example Sentences:
(1) A rich protein solution obtained from the seaweed was assayed for myorelaxant, anticonvulsant and analgesic activity and for its effects on spontaneous locomotor activity, amphetamine-induced hypermotility, exploratory behaviour, barbiturate-induced sleep, and body temperature.
(2) Relying on traditional medicine, all 20 women reported eating brown seaweed soup for 20 days after childbirth, and 5 said that they took tonic herbs during the puerperium.
(3) The microbial populations of the rumens of seaweed-fed and pasture-fed Orkney sheep were examined.
(4) Using an enzyme-linked immunosorbent assay we measured IgA, IgG, and IgM antibody titers to three MPA strains, extracts of those strains, and seaweed-derived sodium alginate, which is similar chemically to the exopolysaccharide of MPA.
(5) Guillermo Diaz-Pulido, a Griffith University associate professor, said the research was “a major step forward in understanding how seaweeds can harm corals and has important implications for comprehending the consequences of increased carbon dioxide emissions on the health of the Great Barrier Reef”.
(6) Fresh seaweed offered to sheep with symptoms of copper toxicity appeared to be therapeutic and to lead to a reduction in plasma Cu level.
(7) Total ciliate populations were quantitatively similar, but in the seaweed-fed animals Dasytricha ruminantium was one of the most dominant species.
(8) If I turn my head to one side, I find I can actually breathe through the seaweed.
(9) Scientists previously knew that increased carbon in the atmosphere – which is absorbed by oceans, making them more acidic – affected the behaviour of seaweed.
(10) Plain dried agar, an extract of seaweed, is low cost and low risk; it can bind bilirubin in the gut, decreasing its enterohepatic circulation, thereby decreasing serum levels.
(11) Two kinds of herbivorous rabbit-fish – the dusty spine-foot and its cousin the marbled spine-foot – have destroyed vast swaths of underwater seaweed forests in the eastern Mediterranean, after migrating through the Suez in recent decades.
(12) When Lisette Kreischer created the Dutch Weed Burger , a plant-based burger, she and her co-founder Mark Kulsdom didn’t just want it to be a vegan alternative to meat; they wanted to encourage people to rethink their consumption habits through the promotion of a food source that’s at the bottom of the food chain – seaweed.
(13) A sulphated heteropolysaccharide, [alpha]D +59 degrees, was isolated from a green seaweed, Spongomorpha indica, by extraction with ammonium oxalate.
(14) Here they mill flour, brew vinegar, season with seaweed, grow their own mushrooms and cure their own meat.
(15) An antileukemic activity of partially purified polysaccharide of an edible seaweed.
(16) Cytotoxic activities were found for partition fractions of 21 species of seaweed.
(17) At Mjoifjordur the stripes of seaweed follow the contours of the shoreline in bright colours – lilac, red and gold.
(18) Such a method is the use of laminaria tents made from the seaweed Laminaria japonica, which, when dried, has the capability of absorbing water and slowly expanding.
(19) Unless the ocean temperature return to normal within a month or two, the coral dies and gets taken over by a blanket of seaweed.
(20) 1,4-Dimethoxy-2-(3-methyl-2-butenyl)-naphthalene [3] was the major low polarity component of extracts of this seaweed, which also contained 2,3-dihydro-2,2-bis(3-methyl-2-butenyl)-1,4-naphthalenedione [6] and 2-(3-methyl-2-butenyl)-2,3-epoxy- 1,4-naphthalenedione 4,4-dimethoxy ketal [7].