(n.) An order of cryptogamous plants, the Filices, which have their fructification on the back of the fronds or leaves. They are usually found in humid soil, sometimes grow epiphytically on trees, and in tropical climates often attain a gigantic size.
Example Sentences:
(1) After being thawed at room temperature, the two CM samples were compared as to their pH, spinnbarkeit and ferning patterns, and it was found that they are quite similar.
(2) Crude ferredoxin preparations were obtained from blue-green algae, green algae, ferns, and higher plants.
(3) A typical fern-like pattern was demonstrated by the crystallized mucus of the healthy individuals.
(4) Water ferns (Salviniaceae) and seed ferns (Pteridospermae) are known as the arbitrary type of Lycopsida which did not reach the state of shot structure of the body.
(5) Astrocyte endfeet of the GLM became irregular in contour, protruding in a fern-leaf fashion into the pial connective tissue.
(6) 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.
(7) Cervical mucus from 6 demonstrated a 3 to 4+ fern phenomena, indicating significant endogenous estrogen production.
(8) Two of the epitopes (I and III) are widely conserved in 34 kDa proteins (presumably B-36 homologues) from the various species tested (Chlamydomonas, moss, fern, oat, onion, carrot, and bean).
(9) Words included in this title include mistletoe, gerbil, acorn, goldfish, guinea pig, dandelion, starling, fern, willow, conifer, heather, buttercup, sycamore, holly, ivy, and conker.
(10) Parameters studied were Schirmer's test, lacrimal meniscus height, break-up time, fluorescein and rose Bengal stains, conjunctival impression cytology, mucus staining, and the ferning test.
(11) The only parameter that correlated with sperm migration into post-partum mucus was ferning formation.
(12) ), Fern Probstmeyer, Robert McCombs, Jean P. Brunschwig, and Vladimir Vonka.
(13) Two glucosides to enhance histamine release from rat peritoneal mast cells were isolated from rhizomes of bracken fern (Pteridium aquilinum (L.) Kuhn) by column chromatography on Sephadex LH-20 and droplet counter-current chromatography, and named braxin A1 and A2.
(14) I picked the strawberries growing up the side of my compost loo for breakfast; physalis and ferns were growing inside my shower; I snacked on pitanga, a delicious sweet-sour berry.
(15) Ferning was present in 29% of pipette samples, averaging 0.41 mm2 in the form of FR in the total series.
(16) The anisotropic period, 7 days long, is inscribed within the ferning period.
(17) Axonemes from the heterosporous water fern Marsilea vestita were fixed in the presence of tannic acid and examined by thin-section electron microscopy.
(18) Powdered bracken fern mixed with a basic commercial diet (1:4 by weight) was fed to a group of 40 ICR strain mice for 20 weeks after the implantation of a glass bead into the bladder.
(19) I’m obviously a big supporter of the change, I think there are a lot of strong arguments in favour of the change.” Key has previously said he would prefer a new flag featuring the silver fern on a black background.
(20) For all the memorable showdowns between Paxman and Tony Blair, it was Fern Britton who extracted the critical admission from Blair that he would have wanted to remove Saddam whether or not Iraq had WMD.
Pteridophyta
Definition:
(n. pl.) A class of flowerless plants, embracing ferns, horsetails, club mosses, quillworts, and other like plants. See the Note under Cryptogamia.
Example Sentences:
(1) To elucidate the evolutionary relationship between the Spermatophyta, Pteridophyta and Bryophyta, we cloned a fragment of chloroplast DNA from the fern Angiopteris lygodiifolia (Pteridophyta) and determined its nucleotide sequence.
(2) These two polyamines were not detected in any species of Pteridophyta, Gymnospermae, and fungi even though their possible precursor, diaminopropane, was found in some species.
(3) In the course of evolution toward polymerization and integration of fronds, the group of arborescent Pteridophyta were transformed into shoot plants, initially of the Cycas type.
(4) The following separation of the main growth forms of Pteridophyta is proposed: thin-rhizomatous, creeping-rosetted, ascending-rosetted, vertical-rosetted, and arborescent.
(5) Polyamine contents of various species of plants and fungi including Bryophyta, Pteridophyta, Gymnospermae, Ascomycota, Basidiomycota, and Lichenobionta were determined by the combination of six chromatographic techniques.
(6) Homospermidine was one of the major polyamines in Bryophyta and Lichenobionta, and was detected in most species of Pteridophyta and sporadically in higher plants.
(7) Comparisons of the deduced amino acid and nucleotide sequences of these genes from the three plant groups indicate that Angiopteris sequences are more closely related to those of Bryophyta species (85% identity on average) than to those of seed plants (76% identity on average), supporting a hypothesis that the Bryophyta and Pteridophyta diverged more recently from one another than their common progenitor diverged from that of the Spermatophyta.
(8) A survey and discussion are presented of plants classified as Spermatophyta and Pteridophyta, extracts of which have been shown to be oncogenic or tumor-promoting in animals.
(9) Plants known to contain any of the 28 oncogens (excluding shikimic acid and caffeine) have been tabulated; they represent at least 454 species, 110 genera, and 34 families of Spermatophyta and Pteridophyta.
(10) The most primitive growth form of Pteridophyta is acknowledged as the thin-rhizomatous.