Filtration is a physical or chemical separation process that separates solid matter and fluid from a mixture using a filter medium that has a complex structure through which only the fluid can pass. Solid particles that cannot pass through the filter medium are described as oversize and the fluid that passes through is called the filtrate. Oversize particles may form a filter cake on top of the filter and may also block the filter lattice, preventing the fluid phase from crossing the filter, known as blinding. The size of the largest particles that can successfully pass through a filter is called the effective pore size of that filter. The separation of solid and fluid is imperfect; solids will be contaminated with some fluid and filtrate will contain fine particles. Filtration occurs both in nature and in engineered systems; there are biological, geological, and industrial forms.
John Baskerville was an English businessman, in areas including japanning and papier-mâché, but he is best remembered as a printer and type designer.
The northern blot, or RNA blot, is a technique used in molecular biology research to study gene expression by detection of RNA in a sample.
The western blot, or western blotting, is a widely used analytical technique in molecular biology and immunogenetics to detect specific proteins in a sample of tissue homogenate or extract.
Filter paper is a semi-permeable paper barrier placed perpendicular to a liquid or air flow. It is used to separate fine solid particles from liquids or gases.
Maidstone is the largest town in Kent, England, of which it is the county town. Maidstone is historically important and lies 32 miles (51 km) east-south-east of London. The River Medway runs through the centre of the town, linking it with Rochester and the Thames Estuary. Historically, the river carried much of the town's trade as the centre of the agricultural county of Kent, known as the Garden of England. There is evidence of settlement in the area dating back before the Stone Age. The town, part of the borough of Maidstone, had an approximate population of 100,000 in 2019. Since World War II, the town's economy has shifted from heavy industry towards light industry and services.
A fecal coliform is a facultatively anaerobic, rod-shaped, gram-negative, non-sporulating bacterium. Coliform bacteria generally originate in the intestines of warm-blooded animals. Fecal coliforms are capable of growth in the presence of bile salts or similar surface agents, are oxidase negative, and produce acid and gas from lactose within 48 hours at 44 ± 0.5°C. The term "thermotolerant coliform" is more correct and is gaining acceptance over "fecal coliform".
Wove paper is a writing paper with a uniform surface, not ribbed or watermarked. The papermaking mould's wires run parallel to each other to produce laid paper, but they are woven together into a fine wire mesh for wove paper. The originator of this new papermaking technique was James Whatman (1702–1759) from Kent, England.
Events from the year 1740 in Great Britain.
An industrial filter press is a tool used in separation processes, specifically to separate solids and liquids. The machine stacks many filter elements and allows the filter to be easily opened to remove the filtered solids, and allows easy cleaning or replacement of the filter media.
The River Len is a river in Kent, England. It rises at a spring in Bluebell Woods to the southeast of the village centre of Lenham 0.6 miles (0.97 km) from the source of the River Great Stour; both rise on the Greensand Ridge. Its length is c10 miles (16 km). It enters the River Medway at Maidstone.
Paper is a thin sheet material produced by mechanically or chemically processing cellulose fibres derived from wood, rags, grasses or other vegetable sources in water, draining the water through fine mesh leaving the fibre evenly distributed on the surface, followed by pressing and drying. Although paper was originally made in single sheets by hand, almost all is now made on large machines—some making reels 10 metres wide, running at 2,000 metres per minute and up to 600,000 tonnes a year. It is a versatile material with many uses, including printing, packaging, decorating, writing, cleaning, filter paper, wallpaper, book endpaper, conservation paper, laminated worktops, toilet tissue, currency and security paper and a number of industrial and construction processes.
The River Medway and its tributaries and sub-tributaries have been used for more than 1,150 years as a source of power. There are over two hundred sites where the use of water power is known. Many different processes were performed by the use of water power:- corn milling, fulling, paper making, iron smelting, pumping water, making gunpowder, vegetable-oil extraction, and electricity generation. Today, there is just one watermill working for trade. Those that remain have mostly been converted. Such conversions include a garage, dwellings, restaurants, museums and a wedding venue. Some watermills are mere derelict shells, lower walls or lesser remains. Of the majority, there is nothing to be seen. A large number of tributaries feed into the River Medway. The tributaries that powered watermills will be described in the order that they feed in. The mills are described in order from source to mouth. Left bank and right bank are referred to as though the reader is facing downstream. This article deals with the watermills on the tributaries that feed in below Yalding.
A reverse phase protein lysate microarray (RPMA) is a protein microarray designed as a dot-blot platform that allows measurement of protein expression levels in a large number of biological samples simultaneously in a quantitative manner when high-quality antibodies are available.
Postage stamp paper is the foundation or substrate of the postage stamp to which the ink for the stamp's design is applied to one side and the adhesive is applied to the other. The paper is not only the foundation of the stamp but it has also been incorporated into the stamp's design, has provided security against fraud and has aided in the automation of the postal delivery system.
James Whatman (1702–1759), the Elder, was a paper maker, born in Kent, who made revolutionary advances to the craft in England. He is noted as the inventor of wove paper, an innovation used for high-quality art and printing. The techniques continued to be developed by his son, James Whatman the Younger (1741–1798). At a time when the craft was based in smaller paper mills, his innovations led to the large scale and widespread industrialisation of paper manufacturing.
Hahnemühle FineArt, Inc. is a paper manufacturing company in the Relliehausen district of Dassel, Germany. It is a significant producer of coated paper for inkjet printing, artist's paper for traditional painting and printing techniques, and filter paper for industry and research.
Gravity filtration is a method of filtering impurities from solutions by using gravity to pull liquid through a filter. The two main kinds of filtration used in laboratories are gravity and vacuum/suction. Gravity filtration is often used in chemical laboratories to filter precipitates from precipitation reactions as well as drying agents, inadmissible side items, or remaining reactants. While it can also be used to separate out strong products, vacuum filtration is more commonly used for this purpose.
Susanna Whatman was a British writer on household management who came to notice about 200 years after her birth.
