Diatom cell walls are made up of biogenic silica ; silica synthesised in the diatom cell by the polymerisation of silicic acid.

Diatom communities are a popular tool for monitoring environmental conditions, past and present, and are commonly used in studies of water quality.

Diatom cells are contained within a unique silica cell wall comprising two separate valves ( or shells ).

Diatom cell walls are also called frustules or tests, and their two valves typically overlap one over the other like the two halves of a petri dish.

Diatom s are one of the most common types of phytoplankton.

The major groups of algae are Cyanobacteria, Green Algae, Dinoflagellates, Coccolithophores and Diatom Algae.

Diatom cell walls are made up of biogenic silica ; silica synthesised in the diatom cell by the polymerisation of silicic acid.

if the Government certifies that production may be possible from the property, the royalty obligation continues for the 10-year period usually specified in the contract or until the Government's contribution is repaid with interest.

Our research and development program, serving as it does an industry which must compete against low-cost production throughout the world, continues to have primary emphasis at Leesona.

In 1888, all production was moved, by Edward Drummond Libbey, to Toledo, Ohio, where it continues today under the name Owens Illinois.

Outside festival season, Edinburgh continues to support a number of theatres and production companies.

Beetle production in Latin America continues until 2003.

Even though it is a very old industry, meat production continues to be shaped strongly by the rapidly evolving demands of customers.

Illicit production of cannabis for domestic and international drug markets continues to ask as an international problem, as do rumours that the country operates as a transit point for opiates from Southeast Asia to the West

The production of meat has grown from 6, 813, 000 tonnes in 1999 to 9, 331, 000 tonnes in 2008, and continues to grow.

While the production of coffee and tea is well-suited to the small farms, steep slopes, and cool climates of Rwanda and has ensured access to foreign exchange over the years, farm size continues to decrease.

San Francisco Bay continues to support some of the densest industrial production and urban settlement in the United States.

The Microsoft Trackball Explorer continues to be extremely popular ( it has no analogous design in production by another company ), with used models selling for ~$ 300 on ebay.

Since the Bronze Age, the region's natural fertility has been greatly extended by irrigation works, upon which much of its agricultural production continues to depend.

Demand continues to be strong, with price increases and new infrastructure to raise production predicted for the next few years.

Knorr, which is today a Unilever brand, continues the production of Erbswurst to the present day.

But in 2004, a Luxembourg-based company called MPG ( which stands for Magic Production Group ) took over toy production, although Ferrero continues to make Kinder Surprise chocolate.

Concern over the toxicity and persistence ( chemical stability ) of PCBs in the environment led the United States Congress to ban their domestic production in 1979, although some use continues in closed systems such as capacitors and transformers.

Industry today continues to use line matrix in the print production of mission critical business document production.

The heritage of silk rearing and weaving is very old and continues today especially with the production of Muga and Pat riha and mekhela chador, the three-piece silk sarees woven with traditional motifs.

Most mammals normally become lactose intolerant after weaning, but some human populations have developed lactase persistence, in which lactase production continues into adulthood.

Diamond production continues to be a very important part of Namibia's economy.

Vineyard in the Rue Saint-Vincent ; the day of the Feast of gardens, 15 days after harvest. There is a small vineyard in the Rue Saint-Vincent, which continues the tradition of wine production in the Île de France ; it yields about 500 litres per year.

Rather than having production of anime revolve around a single creator, as was the case for Mushi, which was headed by Osamu Tezuka, Sunrise decided that production should focus around the producers, a strategy that continues to this date.

The assembly line developed by Ford Motor Company between 1908 and 1915 made assembly lines famous in the following decade through the social ramifications of mass production, such as the affordability of the Ford Model T and the introduction of high wages for Ford workers.

The Théâtre du Châtelet, Paris production ran from February 15, 2010 through February 20, 2010.

Mirvish Productions presented the earlier Stratford production at the Canon Theatre, Toronto, in December 2010 through January 2011.

In particular, Intel's transition to the 180 nm production process, starting in late 1999 and running through to mid-2000, suffered delays.

Other important Beech planes are the King Air / Super King Air line of twin-engine turboprops, in production since 1964, the Baron, a twin-engine variant of the Bonanza, and the Beechcraft Model 18, originally a business transport and commuter airliner from the late 1930s through the 1960s, which remains in active service as a cargo transport.

Brewing is the production of beer through steeping a starch source ( commonly cereal grains ) in water and then fermenting with yeast.

Treasury notes had full legal tender status and were not convertible for gold through the Bank of England, replacing the gold coin in circulation to prevent a run on sterling and to enable raw material purchases for armament production.

Some examples are in improving crop technology ( not a medical application per se ; see BioSystems Engineering ), the manufacture of synthetic human insulin through the use of modified bacteria, the manufacture of erythropoietin in hamster ovary cells, and the production of new types of experimental mice such as the oncomouse ( cancer mouse ) for research.

In addition to the production of nutmeg and mace, Banda maintained significant entrepot trade ; goods that moved through Banda included cloves from Ternate and Tidore in the north, bird of paradise feathers from the Aru Islands and western New Guinea, massoi bark for traditional medicines, and slaves.

Behavioral coordination and production of signalling substances is achieved through interpretation processes that enables the organism to differ between self or non-self, abiotic indicator, biotic message from similar, related, or non-related species, and even filter out " noise ", i. e. similar molecules without biotic content.

For example, the traditional common law rule through most of the 19th century was that a plaintiff could not recover for a defendant's negligent production or distribution of a harmful instrumentality unless the two were in privity of contract.

A mixed economy is a largely market-based economy consisting of both private and public ownership of the means of production and economic interventionism through macroeconomic policies intended to correct market failures, reduce unemployment and keep inflation low.

In most cases, a central bank has monopoly control over emission of coins and banknotes ( fiat money ) for its own area of circulation ( a country or group of countries ); it regulates the production of currency by banks ( credit ) through monetary policy.

Other celebrities such as Tyler Perry, George Lucas, and Steven Spielberg have become successful entrepreneurs through starting their own film production companies and running their own movie studios.

In a final, production quality rendering of a ray traced work, multiple rays are generally shot for each pixel, and traced not just to the first object of intersection, but rather, through a number of sequential ' bounces ', using the known laws of optics such as " angle of incidence equals angle of reflection " and more advanced laws that deal with refraction and surface roughness.

His main emphasis was on the benefit of free internal and international trade, which he thought could increase wealth through specialization in production.

She then reprised the role in the Broadway production from January 10 through November 12, 2006.

They also thought the collapse would create new production possibilities by eliminating central planning, substituting a decentralized market system, eliminating huge macroeconomic and structural distortions through liberalization, and providing incentives through privatization.

The few surviving bacteria conserve their energy and stored nutrients during the passage through the stomach by shutting down much protein production.

V. cholerae bacteria start up production of the hollow cylindrical protein flagellin to make flagella, the cork-screw helical fibers they rotate to propel themselves through the mucus of the small intestine.

Microbiologists have studied the genetic mechanisms by which the V. cholerae bacteria turn off the production of some proteins and turn on the production of other proteins as they respond to the series of chemical environments they encounter, passing through the stomach, through the mucous layer of the small intestine, and on to the intestinal wall.