(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.
Spermatozoid
Definition:
(n.) The male germ cell in animals and plants, the essential element in fertilization; a microscopic animalcule-like particle, usually provided with one or more cilia by which it is capable of active motion. In animals, the familiar type is that of a small, more or less ovoid head, with a delicate threadlike cilium, or tail. Called also spermatozoon. In plants the more usual term is antherozoid.
Example Sentences:
(1) The spermatozoid content of DNA was analyzed using the Feulgen staining method and the relative content of histone proteins by the Alfert and Geschwind staining method.
(2) The presence of antibodies against spermatozoids was considered as an important factor associated with AIDS and previous states of the AIDS detected by OKT8 greater than 30% of lymphocytes.
(3) The authors analyzed in 196 sterile women the ovulation mucus by the microagglutination test and found a high anti-spermatozoidal activity in 24 (12%) women.
(4) The predominant cytologic features were granulomatous inflammation (nontuberculous and non-foreign body) and spermatozoids (intrahistiocytic or as extracellular spermatic debris).
(5) The Hynie method was observed to have some advantages over other methods: it is easy to apply and provides exact data which are useful in determining spermatozoidal deficiencies in sterility cases.
(6) In animals of both subgroups the spermatozoid concentration in the epididymal suspension was lowered and the relative content of spermatozoids with morphologically abnormal heads in suspension smears was increased.
(7) The microtubules on the outside of the nucleus of the mature spermatozoid of Pteridium form a complex with the envelope, and the perinuclear space is eliminated.
(8) A relationship between transferrin and spermatozoid concentration in sperm was shown.
(9) This membrane also undergoes growth, the outer layer extending into the cytoplasm and surrounding spermatozoid mitochondria.
(10) This layer may be important in preventing other spermatozoids from fusing with the egg.
(11) Similarly, the incubation of spermatozoids obtained from the tail of the epididymis with CPhM causes them to produce only 7% fertilization, instead of the normal rate of 80%.
(12) The prognosis depends on the alterations seen on the sperm count parameters; but there is no threshold figure under which no pregnancy is observed (except for zero), concerning the count, the gradual mobility or the morphology of the spermatozoids.
(13) The quantitative yield is given for DNA and RNA preparations from the mentioned objects, the molecular weight of roach and bream DNA, nucleotide composition of roach DNA as well as fractional composition of bream spermatozoids RNA are determined.
(14) The ultrastructure of the mature spermatozoid of Marsilea vestita was studied after its release from the microspore and prior to its penetration of the egg.
(15) After spermatozoid penetration, a new extracellular layer appears above the surface of the egg, beginning in the region of sperm penetration and spreading across the top of the egg.
(16) Changes in the nucleus and the cytoplasm of both the spermatozoids and spermatides were revealed at the early stages of their formation.
(17) Circadian rhythm of activity of 3H-leucine incorporation into antheridial cells of Chara vulgaris, in natural photoperiod was compared with changes in mitotic activity of antheridial filament cells which form spermatozoids.
(18) Any abnormality often severely compromises the ability to fertilize spermatozoids.
(19) The various criteria of the sperm count then examined, emphasizing the importance of studying the morphology, on optical as well as electron microscopy, since it is the spermatozoid's morphology as well as their mobility that differentiate fertile man from infertile ones.
(20) is fertilized by small biflagellate spermatozoids and both monoecious and dioecious species are found.