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Microplastics In Sediments
Microplastics are fragments of any type of plastic less than in length, according to the U.S. National Oceanic and Atmospheric Administration (NOAA) and the European Chemicals Agency. They cause pollution by entering natural ecosystems from a variety of sources, including cosmetics, clothing, food packaging, and industrial processes. The term ''macroplastics'' is used to differentiate microplastics from larger plastic waste, such as plastic bottles. Two classifications of microplastics are currently recognized. Primary microplastics include any plastic fragments or particles that are already 5.0 mm in size or less before entering the environment. These include microfibers from clothing, microbeads, and plastic pellets (also known as nurdles). Secondary microplastics arise from the degradation (breakdown) of larger plastic products through natural weathering processes after entering the environment. Such sources of secondary microplastics include water and soda bottles, fis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microplastics In Sediments
Microplastics are fragments of any type of plastic less than in length, according to the U.S. National Oceanic and Atmospheric Administration (NOAA) and the European Chemicals Agency. They cause pollution by entering natural ecosystems from a variety of sources, including cosmetics, clothing, food packaging, and industrial processes. The term ''macroplastics'' is used to differentiate microplastics from larger plastic waste, such as plastic bottles. Two classifications of microplastics are currently recognized. Primary microplastics include any plastic fragments or particles that are already 5.0 mm in size or less before entering the environment. These include microfibers from clothing, microbeads, and plastic pellets (also known as nurdles). Secondary microplastics arise from the degradation (breakdown) of larger plastic products through natural weathering processes after entering the environment. Such sources of secondary microplastics include water and soda bottles, fis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bioaccumulation
Bioaccumulation is the gradual accumulation of substances, such as pesticides or other chemicals, in an organism. Bioaccumulation occurs when an organism absorbs a substance at a rate faster than that at which the substance is lost or eliminated by catabolism and excretion. Thus, the longer the biological half-life of a toxic substance, the greater the risk of chronic poisoning, even if environmental levels of the toxin are not very high. Bioaccumulation, for example in fish, can be predicted by models. Hypothesis for molecular size cutoff criteria for use as bioaccumulation potential indicators are not supported by data. Biotransformation can strongly modify bioaccumulation of chemicals in an organism. Toxicity induced by metals is associated with bioaccumulation and biomagnification. Storage or uptake of metals faster than the rate at which an organism metabolizes and excretes lead to the accumulation of that metal. The presence of various chemicals and harmful substances in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Exfoliating
Exfoliation is the removal of dead skin cells and built-up dirt from the skin's surface. The term comes from the Latin word ''exfoliare'' (to strip off leaves). This is a regular practice within the cosmetic industry, both for its outcome of promoting skin regeneration as well as providing a deep cleanse of the skin barrier. Being used in facials, this process can be achieved by mechanical or chemical means, such as microdermabrasion or chemical peels. Exfoliants are advertised as treatments that enhance beauty and promote a youthful and healthy appearance. History Exfoliation was first practiced among the ancient Egyptians. This was also used in Asia, specifically in China, during the Qing Dynasty (1644–1944). Mechanical Exfoliation Mechanical exfoliation methods involve physically scrubbing the skin with an abrasive material. These types of exfoliants include microfiber cloths, adhesive exfoliation sheets, micro-bead facial scrubs, crêpe paper, crushed apricot kernel or a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CNS Drugs
''CNS Drugs'' is a monthly peer-reviewed medical journal published by Adis International (Springer Nature) that covers drug treatment of psychiatric and neurological disorders. Abstracting and indexing The journal is abstracted and indexed in: According to the ''Journal Citation Reports'', the journal has a 2021 impact factor of 6.497. References External links * Pharmacology journals English-language journals Publications established in 1995 Springer Science+Business Media academic journals Monthly journals Hybrid open access journals {{pharma-journal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drug Vector
In pharmacology and medicine vectorization of drugs refers to (intracellular) targeting with plastic, noble metal or silicon nanoparticles or liposomes to which pharmacologically active substances are reversibly bound or attached by adsorption. CNRS researchers have devised a way to overcome the problem of multidrug resistance using polyalkyl cyanoacrylate (PACA) nanoparticles as "vectors". As a developing concept, drug nanocarriers are expected to play a major role in delivering multiple drugs to tumor tissues by overcoming biological barriers. References See also *Vector (molecular biology) *Cancer treatment *Nanomedicine Nanomedicine is the medical application of nanotechnology. Nanomedicine ranges from the medical applications of nanomaterials and biological devices, to nanoelectronic biosensors, and even possible future applications of molecular nanotech ... * Nanobiotechnology * Paul Ehrlich#Magic bullet * Gold nanobeacons Pharmacology Nanomedicine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Air Blaster
An air blaster or air cannon is a de-clogging device with two main components: a pressure vessel (storing air pressure) and a triggering mechanism (high speed release of compressed air). They are permanently installed on silos, bins and hoppers for powdery materials, and are used to prevent caking and to allow maximum storage capacity. They are also used in the film and theatre industries to project simulated debris from explosions, and as surprise effects in Halloween haunts and other attractions. Air blasters do not need any specific air supply. Available plant air is enough with a minimum of 4 bar air pressure (60 psi or 400 kPa), although 5 to 6 bar are preferred for better results (75 to 90 psi). The average air consumption is moderate, and depends on the number of firings per hour, size of the pressure vessel, and number of blasters installed. For instance, a 50-liter air blaster consumes 0.60 Nm³/hour at 6 bar air pressure (90 psi or 600 kPa), with 2 firings per hour. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cleanser
The term cleanser refers to a product that cleans or removes dirt or other substances. A cleanser could be a detergent, and there are many types of cleansers that are produced with a specific objective or focus. For instance a degreaser or carburetor cleanser used in automotive mechanics for cleaning certain engine and car parts. Other varieties include the ones used in cosmetology, dermatology or general skin care. In this case, a cleanser is a facial care product that is used to remove make-up, skin care product residue, microbes, dead skin cells, oils, sweat, dirt and other types of daily pollutants from the face. These washing aids help prevent filth-accumulation, infections, pores clogs, irritation and cosmetic issues like dullness from dead skin buildup & excessive skin shine from sebum buildup. This can also aid in preventing or treating certain skin conditions; such as acne. Cleansing is the first step in a skin care regimen and can be used in addition of a toner and moist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Football Field Microplastics
Football is a family of team sports that involve, to varying degrees, kicking a ball to score a goal. Unqualified, the word ''football'' normally means the form of football that is the most popular where the word is used. Sports commonly called ''football'' include association football (known as ''soccer'' in North America and Australia); gridiron football (specifically American football or Canadian football); Australian rules football; rugby union and rugby league; and Gaelic football. These various forms of football share to varying extent common origins and are known as "football codes". There are a number of references to traditional, ancient, or prehistoric ball games played in many different parts of the world. Contemporary codes of football can be traced back to the codification of these games at English public schools during the 19th century. The expansion and cultural influence of the British Empire allowed these rules of football to spread to areas of British infl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Plymouth
The University of Plymouth is a public research university based predominantly in Plymouth, England, where the main campus is located, but the university has campuses and affiliated colleges across South West England. With students, it is the largest in the United Kingdom by total number of students (including the Open University). It has 2,915 staff. History The university was originally founded as thPlymouth School of Navigation in 1862, before becoming a university college in 1920 and a polytechnic institute in 1970, with its constituent bodies being Plymouth Polytechnic, Rolle College in Exmouth, the Exeter College of Art and Design (which were, before April 1989, run by Devon County Council) and Seale-Hayne College (which before April 1989 was an independent charity). It was renamed Polytechnic South West in 1989, a move that was unpopular with students as the name lacked identity. It was the only polytechnic to be renamed and remained as "PSW" until gaining universi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Richard Thompson (marine Biologist)
Richard Charles Thompson is a marine biologist who researches marine litter. At the University of Plymouth he is director of the Marine Institute; professor of Marine Biology; and leads the International Marine Litter Research Unit. Thompson coined the term "microplastics" in 2004. Education Thompson was educated at University of Newcastle and the University of Liverpool where he was awarded a Ph.D in 1996. Career and research Thompson's paper, ''Lost at Sea: Where is All the Plastic?'', published in the journal ''Science'' in 2004, was the first to use the term microplastics, which has since become common parlance. Since 2010 he has been professor of Marine Biology at the University of Plymouth. Since 2018 he has also been director of the Marine Institute, part of the School of Biological and Marine Sciences at the University. He also leads the University's International Marine Litter Research Unit. Publications *Thompson, Richard. (2006). Plastics. In: ''Dominant Wave Theor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
