Filament sentence example
Each palpacle is a tactile filament, very extensile, without accessory filaments or nematocysts.
Cephalic shield continuous with neck; twelve to fourteen stomachal plates; a posterior pallial filament passing through a notch in shell.
That part of the anther to which the filament is attached is the back, the opposite being the face.
Hence in any infinitesimal part of the fluid the circulation is zero round every small plane curve passing through the vortex line; and consequently the circulation round any curve drawn on the surface of a vortex filament is zero.
These aggregations or colonies, as they are termed, may attached to muddy surfaces by rhizoids; Caulerpa, on the other, assume the form of a plate, a ring, a solid sphere, a hollow sphere, presents a remarkable instance of the way in which much the same a perforate sphere, a closed net, or a simple or branched filament.Advertisement
Indeed the genus Oedogonium exhibits a high degree of specialization in its reproductive system, considering that its thallus has not advanced beyond the stage of an unbranched filament.
The anther is developed before the filament, and is always sessile in the first instance, and sometimes continues so.
The anther-lobes are united to the connective, which is either continuous with the filament or articulated with it.
The tail varies much in length and shape according to the species; sometimes it is rounded at the end, sometimes more or less acutely pointed, or even terminating in a filament.
If through every point of a small closed curve the vortex lines are drawn, a tube is obtained, and the fluid contained is called a vortex filament.Advertisement
At f and g occurs the breaking up of the filament into rodlets.
In some filamentous forms this " fragmentation " into multicellular pieces of equal length or nearly so is a normal phenomenon, each partial filament repeat s ing the growth, division and q?
If the cells remain connected the resulting filament repeats these processes of elongation and subsequent division uniformly so long as the conditions are maintained, and very accurate measurements have been obtained on such a form, e.g.
Hardy has shown that such a destruction of part of the filament may be effected by the attacks of another organism.
The abscissae represent intervals of time, the ordinates the measured lengths of the growing filament.Advertisement
Thus, at 2.33 the length of the filament was 6; at 5.45, at 8 P.M., 70 and so on.
If we place the base of the filament in each case on a base line in the order of the successive times of observation recorded, and at distances apart proportional to the intervals of time (8.30, 10.0, 10.30, 11.40, and so on) and erect the straightened-out filaments, the proportional length of each of which is here given for each period, a line joining the tips of the filaments gives the curve of growth.
Stages of growth of a sheathed filament - a at 9 A.M., b at 3 P.M., cat 9 P.M., d at I I A.M.
In Siphonopodiidae it ends in a disk with papillated margins, and in Pulsellum there is a filament in the centre of the disk.
A typical male flower consists of a central axis bearing numerous spirally-arranged sporophylls (stamens), each of which consists of a slender stalk (filament) terminating distally in a more or less prominent knob or triangular scale, and bearing two or more pollen-sacs (microsporangia) on its lower surface.Advertisement
The stamens of Araucaria and Agathis are peculiar in bearing several long and narrow free pollen-sacs; these may be compared with the sporangiophores of the horsetails (Equisetum); in Taxus (yew) the filament is attached to the centre of a large circular distal expansion, which bears several pollen-sacs on its under surface.
The lower part of the free edge of every mesentery, whether complete or incomplete, is thrown into numerous puckers or folds, and is furnished with a glandular thickening known as a mesenterial filament.
Each mesentery has a filament; but two of them, namely, the pair farthest from the sulcus, are longer than the rest, and have a different form of filament.
The filament most important in the economy of the angler is the first, which is the longest, terminates in a lappet, and is movable in every direction.
In Scrophularia the fifth stamen appears as a scale-like body; in other Scrophulariaceae, as in Pentstemon, it assumes the form of a filament, with hairs at its apex in place of an anther.Advertisement
That portion of the filament in contact with the anther-lobes is termed the connective.
Older flower with the stamens (S) anther is developed o n the c orolla dried up.er(X2) dth e hairs before the filament, and when the latter is not produced, the anther is sessile, as in the mistletoe.
The filament is usually, as its name imports, filiform or threadlike, and cylindrical, or slightly tapering towards its summit.
In some instances, as in Tamarix gallica, Peganum Harmala, and Campanula, the base of the filament is much dilated, and ends suddenly in a narrow thread-like portion.
The filament is generally continuous from one end to the other, but in some cases it is bent or jointed, becoming geniculate; at other times, as in the pellitory, it is spiral.
Hairs, scales, teeth or processes of different kinds are some times developed on the filament.
In Lauraceae there are perfect stamens, each having at the base of the filament two abortive stamens or staminodes, which may be analogous to stipules.
The anther entire (a) with its filament; section of anther (b) showing the four loculi.
When the filament is continuous with the connective, and is prolonged so that the anther-lobes appear to be united to it throughout their whole length, and lie in apposition to it and on both sides of it, the anther is said to be adnate or adherent; when the filament ends at the base of the anther, then the latter is innate or erect.
The connective is joined to the filament by a movable joint forming a lever which plays an important part in the pollinationmechanism.
In Scrophularia the fifth stamen appears in the form of a scale; and in many Pentstemons it is reduced to a filament with hairs or a shrivelled membrane at the apex.
The thin filament is made of a protein called actin.
We conclude that precise control of actin filament dynamics by UNC-60B is required for proper integration of actin into myofibrils.
Under the microscope, dark-ground illumination reveals the details of one of the darker anthers and its filament.
The tungsten bulb has a relatively large, tightly wound filament.
Different types of light bulbs for lamps Using filament bulbs The most commonly used bulbs are filament light bulbs.
The model is applied in evaluation of a remote virtual cathode system for use with the display using thermionic filament cathodes.
There is more energy needed to eject the droplet and also the droplets are formed with a filament.
Under some conditions cofilin severs actin filaments, providing new plus ends for nucleation of actin filament growth.
Each motor drives a protruding helical filament, and the rotating filaments provide the propulsive force for cells to swim.
A type of intermediate filament found in epithelial cells.
The thicker filament also means that the bulbs are more robust.
Video recording showed the fluorescent actin filament rotating like a propeller.
A few decades ago a new design for tungsten filament lamps appeared on the scene.
A myosin filament contains several hundred myosin molecules in two bundles packed end to end.
Dactylogyrus 01 (gill fluke) (212 kb) A gill fluke on the edge of a gill filament at 100x magnification.
For a festive version, try black glitter yarn or add a fine metallic or nylon light-reflective filament.
Under the microscope, using dark-ground illumination, a single pollen covered filament can be seen to have spiked ridges.
The filament is uneven when focussed and gives glare for the same field iris setting as Philips.
Plus, the fluorescent lamps are cheaper to run than filament bulbs.
At a point in time when the PM is most distant from the filament end, a new monomer is able to add on.
The thick filament is made of a protein called myosin.
A myosin filament contains several hundred myosin filament contains several hundred myosin molecules in two bundles packed end to end.
The rectifier tube - The most common problem with rectifier tubes is either low or loss of emission or an open filament.
These four are the first in a collection of fourteen - made of filament silk, they're surprisingly strong.
Each filament is made up of many molecules of a protein called tau.
The advantage of low voltage 12v downlights versus 240v mains voltage downlights is a thicker filament.
Chapter 3 examines the prices of and market for spun yarn whilst Chapter 4 examines acetate filament yarn.
Considered by itself, with the cylinders held fixed, the vortex sets up a circumferential velocity m/r on a radius r, so that the angular momentum of a circular filament of annular cross section dA is pmdA, and of the whole vortex is pm7r(b2-a2).
Any circular filament can be started from rest by the application of a circumferential impulse 7rpmdr at each end of a diameter; so that a mechanism attached to the cylinders, which can set up a uniform distributed impulse rpm across the two parts of a diameter in the liquid, will generate the vortex motion, and react on the cylinder with an impulse couple-pmira 2 and pm7rb 2, having resultant pm7r(b 2 -a 2), and this couple is infinite when b = oo, as the angular momentum of the vortex is infinite.
The former arises when a filament in a sheath, either in consequence of growth in length beyond the capacity of the sheath to accommodate it, FIG.
The Rectifier Tube - The most common problem with rectifier tubes is either low or loss of emission or an open filament.
These four are the first in a collection of fourteen - made of filament silk, they 're surprisingly strong.
It is possible to filament wind with prepreg tapes or with thermoplastic matrix composites.
Any schoolboy today knows that you can make a voltaic battery quite capable of lighting any filament lamp by simply connecting copper to zinc.
Most generic lights which use filament bulbs which produce a yellowy light that is not as bright as a discharge lamp.
This standard bulb uses a heated filament to radiate light.
Halogen gas and a regular light bulb filament combine in a quartz envelope to create a high-wattage, yet still cost-effective light source.
To assemble, attach the filament line to one chair, thread the slinky onto the line, and then attach to the second chair.
The filament line can either be tied to the chair, or taped on securely.
Marsh invented a product known as Nichrome wire, a filament that has the ability to withstand the intense heat that it takes to toast a piece of bread quickly.
For years it was most famous as the material the filament of a light bulb is made from and was strictly for industrial use.
Wrap a strip of nylon filament packing tape around each suitcase to insure it stays closed should it be drop-kicked or otherwise mistreated by baggage handlers.
Made of lightweight filament silk, it skims the thighs, has an elastic waist and can be machine-washed.
Made of filament silk and machine-washable.
Wehnelt discovered that the same effect could be produced by using instead of a carbon filament a platinum wire covered with the oxides of calcium or barium, which when incandescent have the property of copiously emitting negative ions.
The thallus in all cases consists of a branched filament of cells placed end to end, as in many of the Green Algae.
The poles at the ends of an infinitely thin uniform magnet, or magnetic filament, would act as definite centres of force.
Denoting the cross-section a of a filament by dS and its mass by dm, the quantity wdS/dm is called the vorticity; this is the same at all points of a filament, and it does not change during the motion; and the vorticity is given by w cos edS/dm, if dS is the oblique section of which the normal makes an angle e with the filament, while the aggregate vorticity of a mass M inside a surface S is M - l fw cos edS.
The perianth consists of five or six oblong greenish lobes, within which is found a tuft, consisting of a large number of stamens, each of which has a very short filament and an oblong two-lobed anther bursting longitudinally, and surmounted by an oblong lobe, which is the projecting end of the connective.
An alternative method consisted in passing an electric current through a filament of the tetroxide in a vacuum.
Consequently, each primitive filament has a descending and an ascending ramus, and instead of each row forming a simple plate, the plate is double, consisting of a descending and an ascending lamella.
Nevertheless the filament is a complete tube formed of chitinous substance and clothed externally by ciliated epithelium, internally by endothelium and lacunar tissue - a form of connective tissue - as shown in fig.
Rudimentary cephalic eyes occur in the Mytilidae and in Avicula at the base of the first filament of the inner gill, each consisting of a I pigmented epithelial fossa containing a cuticular lens.
The four orders now retained exhibit successive stages in the modification of the ctenidia by reflection and concrescence of the filament, but other organs, such as the heart, adductors, renal organs, may not show corresponding stages.
A girl with a small hand brush of twigs keeps stirring them in the water till the silk softens, and the outer loose fibres (floss) get entangled with the twigs and come off till the end of the main filament (maitre brin) is found.
He has also seen Pleurococcus viridis dividing so as to form a filament, but has not succeeded in seeing the formation of zoospores as described by Chodat.
The experiment of Engelmann referred to deserves to be mentioned here, if only in illustration .of the use to which algae have been put in the study of physiological problems. Engelmann observed that certain bacteria were motile only in the presence of oxygen, and that they retained their motility in a microscopic preparation in the neighbourhood of an algal filament when they had come to rest elsewhere on account of the exhaustion of oxygen.
After the bacteria had all been brought to rest by being placed in the dark, he threw a spectrum upon the filament, and observed in what region the bacteria first regained their motility, owing to the liberation of oxygen in the process of carbon-assimilation.
Edison in the United States, were engaged in struggling with the difficulties of producing a suitable carbon incandescence electric lamp. Edison constructed in 1879 a successful lamp of this type consisting of a vessel wholly of glass containing a carbon filament made by carbonizing paper or some other carbonizable material, the vessel being exhausted and the current led into the filament through platinum wires.
Germinating spores in various stages, more highly magnified, and showing the different ways of escape of the filament from the spore-membrane.
From the edges of the vase the four primary tentacles grow out, each a slender filament with a solid endodermal axis.
Fleming discovered that if the filament is made incandescent by the current from an insulated battery there is a unilateral conductivity of the rarefied gas between the hot filament and the metal plate, such that if the negative terminal of the filament is connected outside the lamp through a coil in which electric oscillations are created with the platinum plate, only one half of the oscillations are permitted to pass, viz., those which carry negative electricity from the hot filament to the cooled plate through the vacuous space.
If a series of such elements, all equally and longitudinally magnetized, were placed end to end with their unlike poles in contact, the external action of the filament thus formed would be reduced to that of the two extreme poles.
The same would be the case if the magnetization of the filament varied inversely as the area of its cross-section a in different parts.
Such a filament is called a simple magnetic solenoid, and the product aI is called the strength of the solenoid.
The slender filaments of the stamens vary widely, often in the same flower; the anthers are linear to ovate in shape, attached at the back to the filament, and open lengthwise.
Patten in 1824; whilst in 1881 Rankine Kennedy resuscitated the idea for the purpose of exhausting filament electric lamps.
At a time when the Cartesian system of vortices universally prevailed, he found it necessary to investigate that hypothesis, and in the course of his investigations he showed that the velocity of any stratum of the vortex is an arithmetical mean between the velocities of the strata which enclose it; and from this it evidently follows that the velocity of a filament of water moving in a pipe is an arithmetical mean between the velocities of the filaments which surround it.
The circulation being always zero round a small plane curve passing through the axis of spin in vortical motion, it follows conversely that a vortex filament is composed always of the same fluid particles; and since the circulation round a cross-section of a vortex filament is constant, not changing with the time, it follows from the previous kinematical theorem that aw is constant for all time, and the same for every cross-section of the vortex filament.
A vortex filament must close on itself, or end on a bounding surface, as seen when the tip of a spoon is drawn through the surface of water.
In short, the little chisel becomes in his fingers a painters brush, and when it is remembered that, the basis upon which he works being simply a thread of silk, his hand must be trained to such delicacy of muscular effort as to be capable of arresting the edge of the knile at varying depths within the diameter of the tiny filament, the difficulty of the achievement will be understood.
The cells of the filament may be all alike, and growth may occur equally in all parts (Oscillatoriaceae); or certain cells (heterocysts) may become marked off by their larger size and the transparency of their contents; in which case growth may still be distributed equally throughout (Nostoc), or the filament may be attached where the heterocyst arises, and grow out at the opposite extremity into a fine hair (Rivulariaceae).
Among colonial Desmidiaceae, the break-up of the filament is a preliminary to this conjugation; otherwise the process is the same.
The zygospore becomes surrounded with its own wall, consisting finally of three layers, the outer of which is furnished with spicular prominences of various forms. In Zygnemaceae there is no dissolution of the filaments, but the whole contents of one cell pass over by means of a conjugation-tube into the cavity of a cell of a neighbouring filament, where the zygospore is formed by the fusion of the two FIG.
In all these cases, however, the end-cells of the filaments each give rise to a carpospore, and the aggregate of such sporiferous filaments is a cystocarp. Again, in the family of the Gelidiaceae, the single filament arising from the carpogonium grows back into the tissue and preys upon the cells of the axis and larger branches, after which the end-cells give rise to carpospores and a diffused cystocarp is formed.
In Naccaria, one of the Gelidiaceae, it is observable that the ooblastema filament, as the tube arising from the fertilized carpogonium has been called, fuses completely with a cell contiguous to the carpogonium before giving rise to the foraging filaments already refered to.
The nucleus of the ooblastema filament dominates the FIG.
King patented filament electric lamps exhausted by the same methods.
So extensible is viscous glass that it can be drawn out into a filament sufficiently fine and elastic to be woven into a fabric.
The filaments take on a secondary grouping, the surface of the lamella being thrown into a series of halfcylindrical ridges, each consisting of ten or twenty filaments; a filament of much greater strength and thickness than the others may be placed between each pair of groups.
B,Diagram of the posterior face of a single complete filament with descending ramus and ascending ramus ending in a hook-like process;ep.,ep.,the ciliated junctions; il,j ., inter-lamellar junction.
The attachment of the cell of an ooblastema filament to a cell of the thallus may be effected by means of a minute pore, or the two cells may fuse their contents into one protoplasmic mass.
Tungsten has been applied in the manufacture of filament electric lamps.
The long connective of the single stamen is hinged to the short filament and has a shorter arm ending in a blunt process and a longer arm bearing a half-anther.
In Anodonta, besides being thickened, the skeletal substance of the filament develops a specially dense, rod-like body on each side of each filament.
Next follows the operation of cleaning, in which the silk is simply reeled from one bobbin to another, but on its way it passes through a slit which is sufficiently wide to pass the filament but stops the motion when a thick lump or nib is presented.
With a supply pressure of 200 volts a 5 c.p. carbon filament lamp takes only 0.1 ampere; hence unless a meter will begin to register with 1 1 - 6 - ampere it will fail to record the current consumed by a single small incandescent lamp. In a large supply system such failure would mean a serious loss of revenue.
In very many cases the pollen is carried to the stigma by elongation, curvature or some other movement of the filament, the style or stigma, or corolla or some other part of the flower, or by correlated movements of two or more parts.
In Champia and allied genera, the cylindrical axis is due not to the derivatives of one axial filament, but of several, the growth of which is co-ordinated to form a septated tube.
In this water the cocoons are kept stirring by small brushes rotated by mechanical means, and as the silk softens the brushes gradually rise out of the water, bringing entangled with them the loose floss, and thereby revealing the main filament of each cocoon.