Sieve tubes are joined end-to-end with perforate end-plates between known as sieve plates, which allow transport of photosynthate between the sieve elements.

Sieve tubes are formed from sieve-tube members laid end to end.

Sieve elements are the group of cells that are responsible for actually moving sugar-laden fluids through the plant.

Sieve cells are the more primitive of the two main conducting cell types in phloem, and are found in most seedless vascular plants ( e. g., ferns, club mosses, horsetails ) and gymnosperms ( conifers, Ginkgo, etc .).

For this method, it is also necessary to check for divisibility by all primes that are less than c. Observations analogous to the preceding can be applied recursively, giving the Sieve of Eratosthenes.

These pairs are found through a sieving process, analogous to the Sieve of Eratosthenes ; this motivates the name " Number Field Sieve ".

By solving the riddle ( calculating all the prime numbers below 100 using the Sieve of Eratosthenes and pressing the corresponding buttons backwards ), Roland and his ka-tet are allowed to board Blaine and flee Lud, just as Blaine releases poison gas ( DEP3, a substance similar to what appears as a poison in another of King's books, Eyes of the Dragon.

Sieve cells are long, slender, conducting cells of the phloem that do not form a constituent element of a sieve tube, but which are provided with relatively unspecialized sieve areas, especially in the tapering ends of the cells that overlap those of other sieve cells.

Sieve cells are associated with albuminous cells, which lack starch, thus making it possible to differentiate them from phloem parenchyma.

A number of other extensions are still being developed by the Sieve working group.

The goal of TWINKLE is to implement the sieving step of the Number Field Sieve algorithm, which is the fastest known algorithm for factoring large integers.

Sieve tube cells do contain vacuoles and other organelles, such as ribosomes, before they mature, but these generally migrate to the cell wall and dissolve at maturity ; this ensures there is little to impede the movement of fluids.

The Sieve scripts may be generated by a GUI-based rules editor or they may be entered directly using a text editor.

It has many tributaries: Sieve (), Bisenzio (), Era, Elsa, Pesa and Pescia.

A Sieve of Eratosthenes benchmark, computing all prime numbers less than 65536, was tested on a Sun SPARCstation 1.

The benchmark consists of 22 separate tests, including public domain components ( such as Sieve and Dhrystone ) as well as proprietary components.

* H. Halberstam and H. E. Richert, Sieve methods, Academic Press ( 1974 ) ISBN 0-12-318250-6.

* Brun's Pure Sieve: http :// planetmath. org / encyclopedia / BrunsPureSieve. html

Sieve cells have relatively narrow, uniformly-sized pores in the sieve areas.

Jan's son, Quentin Metsys the Younger, was an artist of the Tudor court, and painted the Sieve Portrait of Elizabeth I of England.

* Factorization using the Elliptic Curve Method, a Java applet which uses ECM and switches to the Self-Initializing Quadratic Sieve when it is faster.

" The Xenakis Sieve as Object: A New Model and a Complete Implementation.

File: Metsys Elizabeth I The Sieve Portrait c1583. jpg | Sieve Portrait of Queen Elizabeth I ( 1583 ) by Quentin Metsys the Younger

In number theory, a lucky number is a natural number in a set which is generated by a " sieve " similar to the Sieve of Eratosthenes that generates the primes.

** The Riesel Sieve project is searching for the smallest Riesel number.

Sieve element plastids of Gymnospermae: Their ultra structure and relation to systematics.

I have just asked these questions in the Pentagon, in the White House, in offices of key scientists across the country and aboard the submarines that prowl for months underwater, with neat rows of green launch tubes which contain Polaris missiles and which are affectionately known as `` Sherwood Forest ''.

If you are dreaming of a blue, shimmering pool right outside your living room windows, close your eyes firmly and fill in the picture with lots and lots of children, damp towels, squashed tubes of suntan oil and semi-inflated plastic toys.

They are sometimes preserved within the voids of other organisms, for instance within empty hyolith conchs, within sponges, worm tubes and under the carapaces of bivalved arthropods, presumably in order to hide from predators or strong storm currents ; or maybe whilst scavenging for food.

In the case of the tapering worm tubes Selkirkia, trilobites are always found with their heads directed towards the opening of the tube, suggesting that they reversed in ; the absence of any moulted carapaces suggests that moulting was not their primary reason for seeking shelter.

The gases are contained in a test-tube ( A ) standing over a large quantity of weak alkali ( B ), and the current is conveyed in wires insulated by U-shaped glass tubes ( CC ) passing through the liquid and round the mouth of the test-tube.

* Laparoscopy -- A minimally invasive approach to abdominal surgery where rigid tubes are inserted through small incisions into the abdominal cavity.

The graphite tubes are heated via their ohmic resistance using a low-voltage high-current power supply ; the temperature in the individual stages can be controlled very closely, and temperature ramps between the individual stages facilitate separation of sample components.

Photomultiplier tubes are the most frequently used detectors in LS AAS, although solid state detectors might be preferred because of their better signal-to-noise ratio.

Two connecting tubes are required.

For example, carbon can be found as diamond, which has a tetrahedral structure around each carbon atom ; graphite, which has layers of carbon atoms with a hexagonal structure stacked on top of each other ; graphene, which is a single layer of graphite that is incredibly strong ; fullerenes, which have nearly spherical shapes ; and carbon nanotubes, which are tubes with a hexagonal structure ( even these may differ from each other in electrical properties ).

Patients who are restless may also try to pull on tubes or dressings so soft cloth wrist restraints may be put on.

Externally heated electrodes are often used to generate an electron cloud as in the filament or indirectly heated cathode of vacuum tubes.

Vacuum tubes and sprytrons are some of the electronic switching and amplifying devices based on vacuum conductivity.

Cathode rays ( also called an electron beam or e-beam ) are streams of electrons observed in vacuum tubes.

Cathode rays are invisible, but their presence was first detected in early vacuum tubes when they struck the glass wall of the tube, exciting the atoms of the glass and causing them to emit light, a glow called fluorescence.

These are used in cathode ray tubes, found in televisions and computer monitors, and in electron microscopes.

Cathodes used for field electron emission in vacuum tubes are called cold cathodes.

Hot electron emitters are also used as the electrodes in fluorescent lamps and in the source tubes of X-ray machines.

No modern tube based Hi-Fi systems are known to use this tube type, as simpler and more readily available tubes have again filled this niche.

Thermionic diodes are thermionic-valve devices ( also known as vacuum tubes, tubes, or valves ), which are arrangements of electrodes surrounded by a vacuum within a glass envelope.

Electrons are at the heart of cathode ray tubes, which have been used extensively as display devices in laboratory instruments, computer monitors and television sets.

Vacuum tubes are still used in some specialist applications such as high power RF amplifiers, cathode ray tubes, specialist audio equipment and some microwave devices.