Hemoglobin, Sickle: An abnormal hemoglobin resulting from the substitution of valine for glutamic acid at position 6 of the beta chain of the globin moiety. The heterozygous state results in sickle cell trait, the homozygous in sickle cell anemia.Polymers: Compounds formed by the joining of smaller, usually repeating, units linked by covalent bonds. These compounds often form large macromolecules (e.g., BIOPOLYMERS; PLASTICS).Biography as Topic: A written account of a person's life and the branch of literature concerned with the lives of people. (Harrod's Librarians' Glossary, 7th ed)Encyclopedias as Topic: Works containing information articles on subjects in every field of knowledge, usually arranged in alphabetical order, or a similar work limited to a special field or subject. (From The ALA Glossary of Library and Information Science, 1983)BiographyBooks, Illustrated: Books containing photographs, prints, drawings, portraits, plates, diagrams, facsimiles, maps, tables, or other representations or systematic arrangement of data designed to elucidate or decorate its contents. (From The ALA Glossary of Library and Information Science, 1983, p114)EncyclopediasHistory, 19th Century: Time period from 1801 through 1900 of the common era.Internet: A loose confederation of computer communication networks around the world. The networks that make up the Internet are connected through several backbone networks. The Internet grew out of the US Government ARPAnet project and was designed to facilitate information exchange.Cyanoacrylates: A group of compounds having the general formula CH2=C(CN)-COOR; it polymerizes on contact with moisture; used as tissue adhesive; higher homologs have hemostatic and antibacterial properties.Enbucrilate: A tissue adhesive that is applied as a monomer to moist tissue and polymerizes to form a bond. It is slowly biodegradable and used in all kinds of surgery, including dental.Anti-Bacterial Agents: Substances that reduce the growth or reproduction of BACTERIA.Tissue Adhesives: Substances used to cause adherence of tissue to tissue or tissue to non-tissue surfaces, as for prostheses.Escherichia coli: A species of gram-negative, facultatively anaerobic, rod-shaped bacteria (GRAM-NEGATIVE FACULTATIVELY ANAEROBIC RODS) commonly found in the lower part of the intestine of warm-blooded animals. It is usually nonpathogenic, but some strains are known to produce DIARRHEA and pyogenic infections. Pathogenic strains (virotypes) are classified by their specific pathogenic mechanisms such as toxins (ENTEROTOXIGENIC ESCHERICHIA COLI), etc.Infection Control: Programs of disease surveillance, generally within health care facilities, designed to investigate, prevent, and control the spread of infections and their causative microorganisms.Dermatitis, Seborrheic: A chronic inflammatory disease of the skin with unknown etiology. It is characterized by moderate ERYTHEMA, dry, moist, or greasy (SEBACEOUS GLAND) scaling and yellow crusted patches on various areas, especially the scalp, that exfoliate as dandruff. Seborrheic dermatitis is common in children and adolescents with HIV INFECTIONS.Acne Vulgaris: A chronic disorder of the pilosebaceous apparatus associated with an increase in sebum secretion. It is characterized by open comedones (blackheads), closed comedones (whiteheads), and pustular nodules. The cause is unknown, but heredity and age are predisposing factors.Waxes: A plastic substance deposited by insects or obtained from plants. Waxes are esters of various fatty acids with higher, usually monohydric alcohols. The wax of pharmacy is principally yellow wax (beeswax), the material of which honeycomb is made. It consists chiefly of cerotic acid and myricin and is used in making ointments, cerates, etc. (Dorland, 27th ed)Pediculus: Lice of the genus Pediculus, family Pediculidae. Pediculus humanus corporus is the human body louse and Pediculus humanus capitis is the human head louse.Scalp DermatosesEmollients: Oleagenous substances used topically to soothe, soften or protect skin or mucous membranes. They are used also as vehicles for other dermatologic agents.Cosmetics: Substances intended to be applied to the human body for cleansing, beautifying, promoting attractiveness, or altering the appearance without affecting the body's structure or functions. Included in this definition are skin creams, lotions, perfumes, lipsticks, fingernail polishes, eye and facial makeup preparations, permanent waves, hair colors, toothpastes, and deodorants, as well as any material intended for use as a component of a cosmetic product. (U.S. Food & Drug Administration Center for Food Safety & Applied Nutrition Office of Cosmetics Fact Sheet (web page) Feb 1995)Mythology: A body of stories, the origins of which may be unknown or forgotten, that serve to explain practices, beliefs, institutions or natural phenomena. Mythology includes legends and folk tales. It may refer to classical mythology or to a body of modern thought and modern life. (From Webster's 1st ed)Dictionaries, MedicalDictionaries as Topic: Lists of words, usually in alphabetical order, giving information about form, pronunciation, etymology, grammar, and meaning.Molecular Sequence Annotation: The addition of descriptive information about the function or structure of a molecular sequence to its MOLECULAR SEQUENCE DATA record.Databases, Genetic: Databases devoted to knowledge about specific genes and gene products.Milk, HumanThermal Conductivity: The heat flow across a surface per unit area per unit time, divided by the negative of the rate of change of temperature with distance in a direction perpendicular to the surface. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)Orthodontic Wires: Wires of various dimensions and grades made of stainless steel or precious metal. They are used in orthodontic treatment.Clothing: Fabric or other material used to cover the body.Body Temperature Regulation: The processes of heating and cooling that an organism uses to control its temperature.Orthodontic Appliance Design: The planning, calculation, and creation of an apparatus for the purpose of correcting the placement or straightening of teeth.Friction: Surface resistance to the relative motion of one body against the rubbing, sliding, rolling, or flowing of another with which it is in contact.Solar Energy: Energy transmitted from the sun in the form of electromagnetic radiation.Electric Power Supplies: Devices that control the supply of electric current for running electrical equipment.Cathode Ray Tube: A vacuum tube equipped with an electron emitting CATHODE and a fluorescent screen which emits visible light when excited by the cathode ray. Cathode ray tubes are used as imaging devises for TELEVISIONS; COMPUTER TERMINALS; TEXT TELECOMMUNICATION DEVICES; oscilloscopes; and other DATA DISPLAY devices.Electrodes: Electric conductors through which electric currents enter or leave a medium, whether it be an electrolytic solution, solid, molten mass, gas, or vacuum.Carbon: A nonmetallic element with atomic symbol C, atomic number 6, and atomic weight [12.0096; 12.0116]. It may occur as several different allotropes including DIAMOND; CHARCOAL; and GRAPHITE; and as SOOT from incompletely burned fuel.Bioelectric Energy Sources: Electric power supply devices which convert biological energy, such as chemical energy of metabolism or mechanical energy of periodic movements, into electrical energy.Nanoparticles: Nanometer-sized particles that are nanoscale in three dimensions. They include nanocrystaline materials; NANOCAPSULES; METAL NANOPARTICLES; DENDRIMERS, and QUANTUM DOTS. The uses of nanoparticles include DRUG DELIVERY SYSTEMS and cancer targeting and imaging.Carbon Footprint: A measure of the total greenhouse gas emissions produced by an individual, organization, event, or product. It is measured in units of equivalent kilograms of CARBON DIOXIDE generated in a given time frame.Parvalbumins: Low molecular weight, calcium binding muscle proteins. Their physiological function is possibly related to the contractile process.Ecosystem: A functional system which includes the organisms of a natural community together with their environment. (McGraw Hill Dictionary of Scientific and Technical Terms, 4th ed)MedlinePlus: NATIONAL LIBRARY OF MEDICINE service for health professionals and consumers. It links extensive information from the National Institutes of Health and other reviewed sources of information on specific diseases and conditions.Patents as Topic: Exclusive legal rights or privileges applied to inventions, plants, etc.Culture Media: Any liquid or solid preparation made specifically for the growth, storage, or transport of microorganisms or other types of cells. The variety of media that exist allow for the culturing of specific microorganisms and cell types, such as differential media, selective media, test media, and defined media. Solid media consist of liquid media that have been solidified with an agent such as AGAR or GELATIN.Luminescent Measurements: Techniques used for determining the values of photometric parameters of light resulting from LUMINESCENCE.Metal Nanoparticles: Nanoparticles produced from metals whose uses include biosensors, optics, and catalysts. In biomedical applications the particles frequently involve the noble metals, especially gold and silver.Particle Size: Relating to the size of solids.Diabetes, Gestational: Diabetes mellitus induced by PREGNANCY but resolved at the end of pregnancy. It does not include previously diagnosed diabetics who become pregnant (PREGNANCY IN DIABETICS). Gestational diabetes usually develops in late pregnancy when insulin antagonistic hormones peaks leading to INSULIN RESISTANCE; GLUCOSE INTOLERANCE; and HYPERGLYCEMIA.Preventive Medicine: A medical specialty primarily concerned with prevention of disease (PRIMARY PREVENTION) and the promotion and preservation of health in the individual.Pregnancy: The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH.Glucose Tolerance Test: A test to determine the ability of an individual to maintain HOMEOSTASIS of BLOOD GLUCOSE. It includes measuring blood glucose levels in a fasting state, and at prescribed intervals before and after oral glucose intake (75 or 100 g) or intravenous infusion (0.5 g/kg).Diabetes Mellitus: A heterogeneous group of disorders characterized by HYPERGLYCEMIA and GLUCOSE INTOLERANCE.Diabetes Mellitus, Type 1: A subtype of DIABETES MELLITUS that is characterized by INSULIN deficiency. It is manifested by the sudden onset of severe HYPERGLYCEMIA, rapid progression to DIABETIC KETOACIDOSIS, and DEATH unless treated with insulin. The disease may occur at any age, but is most common in childhood or adolescence.Blood Glucose: Glucose in blood.
Following the collapse of the coal mining industry in the 1980s, the local economy went through difficult times as it re- ... ". "Site confirmed for MBA Polymers' UK plant". Recycling International. Retrieved 12 April 2014. Historic England, "Church of ... just like Margaret Thatcher in 1980s". The Mirror. Beard, Matthew (18 September 2002). "Agencies in Dock over Mining Villages ...
The majority of acrylamide is used to manufacture various polymers. In the 1970s and 1980s, the proportionately largest use of ... these polymers was in water treatment. Additional uses include as binding, thickening or flocculating agents in grout, cement, ...
His polymer work led the prestigious American Chemical Society award for Applied Polymer Science in 1993. After a brief period ... as research supervisor in the 1980s, he accepted a position as duPont Fellow. Shortly before retirement duPont honored him with ... In the latter half of his stay at DuPont he switched to polymer science where he invented Group Transfer Polymerization (GTP), ... Owen Wright Webster (born March 25, 1929) is a distinguished member of the organic and polymer chemistry communities. His ...
A large number of mining jobs were lost in the late 1980s, and today coal mining has ceased. Rockware Glass is a specialist ... A production facility for chemical polymers was built on Wheatley Hall Road. It changed hands during its existence until DuPont ... Closure of coal mines in the 1970s, and the early 1980s caused some economic difficulties; the town then developed its service ...
Wrapped cable systems were developed independently in the UK (SkyWrap) and Japan (GWWOP) during the 1980s and have been widely ... used for example in heat-shrinkable 33kV cable terminations and in polymer insulators. The initial development involved an all- ... Lashed communication cables on the ground wire or an auxiliary grounded wire were installed until the mid-1980s at several ... Wrapped optical fibre cable technology was developed independently in the UK and Japan in the early 1980s. In the UK, Raychem ...
Justus von Liebig named the polymer melon. Much later in 1937 Linus Pauling showed by x-ray crystallography that heptazines are ... Leonard in the early 1980s. The structure of Berzelius's melon was confirmed only in 2001. The parent substance C6N7H3 is a ...
... the synthesis of polymers with defined end-groups". Polymers. Elsevier. 46 (19): 8458-8468. doi:10.1016/j.polymer.2004.12.061. ... Scientists began to realize the potential of RAFT in controlled radical polymerization in the 1980s. Macromonomers were known ... The Z group primarily affects the stability of the S=C bond and the stability of the adduct radical (Polymer-S-C•(Z)-S-Polymer ... Moad, G.; E. Rizzardo; S. H. Thang (2008). "Radical addition fragmentation chemistry in polymer synthesis". Polymer. 49 (5): ...
The most famous corporations include Yazd Steel, Shimi Plastic of Yazd, and Yazd Polymer. In addition to its connection with ... Yazd has expanded its industrial fields since the 1980s. With at least three main industrial areas each containing over 70 ...
... working with ICI Chemicals and Polymers. In the late 1980s, he worked with halomethanes (these compounds destroyed the ozone ...
In the mid-1980s, Hanna began to divest its historic mining and shipping businesses to focus on polymers. Hanna purchased its ... PolyOne is a provider of specialized polymer materials, services, and solutions with operations in specialty polymer ... divests its mining and shipping business to focus on polymers. Hanna purchased its first polymer company this year. 1993 - BF ... under PolyOne Producer Services Polymer Testing and Analysis - under Polymer Diagnostics, Inc. (PDI) 2010 PolyOne Annual Report ...
In the 1980s, the air freshener market shifted away from aerosols, due to concerns over the destruction of the ozone layer by ... These chemicals, intended to neutralize or destroy odors, included unsaturated esters, pre-polymers, and long-chain aldehydes. ...
... (PANI) is a conducting polymer of the semi-flexible rod polymer family. Although the compound itself was discovered ... over 150 years ago, only since the early 1980s has polyaniline captured the intense attention of the scientific community. This ... processing and material properties of conjugated polymers". Polymer. 37 (22): 5017. doi:10.1016/0032-3861(96)00439-9. Huang, Li ... According to one study in the first step a DP of 265 is reached with the DP of the final polymer at 319. Approximately 19% of ...
"Polysilane High Polymers" J". Chem. Rev. 1989 (89): 1359-1410. doi:10.1021/cr00096a006. James E. Mark, Harry R. Allcock, Robert ... Interest in the polysilanes resumed in the early 1980s when it was reported that [(CH3)2Si]x can be converted to silicon ... Polysilanes are organosilicon compounds with the formula (R2Si)n. They are relatives of traditional organic polymers but their ... When doped with oxidizing agents (SbF5, I2, FeCl3, ferrocinium), the polymers become semiconductors. Most are stable to nearly ...
... to find polymers that could improve latex. She continued to work for Dow Chemical until the late 1980s. Greene was a charter ... At Dow, she researched latex and polymers. Bettye Washington was born in Fort Worth, Texas. She attended segregated public ... In 1973, she joined Dow Chemical's Designed Polymers Research Division, again working with latex, ...
The largely polymer Spectre has a stamped-steel receiver. The Spectre is used by the Swiss armed forces and by Italian special ... It was designed by Roberto Teppa and Claudio Gritti in the mid-1980s. Production in Italy ceased in the year 1997, with the ... M4 submachine gun specifically made for the civilian market have been around since the middle 1980s and up to the late 1990s, ...
Vogel, Herward; Marvel, C. S. (April 1961). "Polybenzimidazoles, new thermally stable polymers". Journal of Polymer Science. 50 ... 1980s - PBI was introduced to the fire service, and through Project Fires an outer shell for turnout gear was developed. PBI ... Journal of Polymer Science Part B: Polymer Physics. 44 (16): 2311-2326. Bibcode:2006JPoSB..44.2311K. doi:10.1002/polb.20862. ... Journal of Polymer Science: Polymer Chemistry Edition. 14 (4): 973-980. Bibcode:1976JPoSA..14..973V. doi:10.1002/pol. ...
In the late 1980s Uzial Gal, designer of the Uzi, sought to improve his design. During this time, American gun manufacturer ... New materials such as Zytel polymer were used in the design to bring the Uzi up to modern standards. The MP9 entered Ruger's ... Therefore, the lower receiver and pistol grip of the MP9 are manufactured from Zytel (a strong and popular polymer at the time ... The development of strong polymers through the years after the Second World War provoked the designers to change the materials ...
Cationic polymers are among the main functional components of hair gel. The positive charges in the polymers causes them to ... are marketed to consumers who want to spike their hair in the style that emerged from the hardcore punk subculture in the 1980s ... because the stretched-out polymer takes up more space than a coiled polymer and thus resists the flow of solvent molecules ... More complicated polymer formulas exist; i.e., a copolymer of vinylpyrrolidone, methacrylamide, and N-vinylimidazole.[citation ...
... created and raced engines consisting of a large percentage of polymers in the 1980s. Version one was based on Ford's 2.3-liter ... Throughout the 1980s, Holtzberg was granted 10 patents for composite engine parts and their methods of production. The patents ... "Polimotor 2 All-Polymer Race Engine Project Chooses Solvay's Amodel® PPA and Tecnoflon® FKM for Water Cooling Components and ... "Polimotor 2 All-Polymer Race Engine Project Chooses Solvay's Ryton® PPS and Tecnoflon® FKM for Demanding Fuel Injection System ...
In the 1980s, it started polymer-based packaging and created material for commercial use in the form of flexible packaging. • ...
In the late 1980s, Mr. Hillberg and Robert Schuets, owner of Olympic Arms Inc., worked together on their mutual goal of ... This polymer revival of R. Hillberg's 1950s rimfire 'ray gun' is sleek, light and fun to shoot. Bodinson, Holt (July 2009). " ... Olympic Arms introduced a polymer-framed version of Mr. Hillberg's pistol in 2004, and he received one of the first production ...
... was developed in the early 1980s in Sweden by Perstorp AB, and given the name Iodosorb. The product was shown ... It is a water-soluble modified starch polymer containing 0.9% iodine, calculated on a weight-weight basis, within a helical ...
This synthetic polymer material was invented and developed by SRI International in the 1980s and is manufactured by the Toyobo ...
The two men each filed substantively identical patents on the polymer at the same time. Because diapers are a low-margin ... After the patent expired in the mid-1980s, however, manufacturers began to introduce "superabsorbent" disposable diapers, made ... In 1966, Harmon and Harper each independently discovered that a small amount of a highly absorbent polymer could be more ... with the polymers in place of excess paper in the diaper's core. The size and weight of disposable diapers then dropped ...
PTT's value as a commercial polymer has improved due to more economical and efficient methods to produce 1,3-propanediol in the ... 1980s by Degussa, via acrolein, and Shell via the hydroformylation of ethylene oxide. DuPont has successfully commercialized ... The two monomer units used in producing this polymer are: 1,3-propanediol and terephthalic acid or dimethyl terephthalate. ... Similar to the ubiquitous poly(ethylene terephthalate), this polymer is prepared by the esterification of 1,3-propanediol (HO( ...
This requirement for range and endurance resulted in the 1980s Collins-class design incorporating a large fuel load, large ... The German Type 214 submarine employs advanced polymer electrolyte membrane fuel cells that assist in delivering it comparable ...
Following the collapse of the coal mining industry in the 1980s, the local economy went through difficult times as it re- ... ". "Site confirmed for MBA Polymers UK plant". Recycling International. Retrieved 12 April 2014. Historic England, "Church of ... just like Margaret Thatcher in 1980s". The Mirror. Beard, Matthew (18 September 2002). "Agencies in Dock over Mining Villages ...
In the 1980s, Canadian engineering company AGRA Vadeko and US chemical company US Mobil Chemical Company developed a polymer ... Numismatics portal Polymers Banknotes of the Australian dollar CSIRO Although the £5 Northern Bank polymer banknote was a one- ... On 3 May 1999, New Zealand released the polymer $20 note. The Reserve Bank of New Zealand switched all of its notes to polymer ... Polymer banknotes are banknotes made from a polymer such as biaxially oriented polypropylene (BOPP). Such notes incorporate ...
5 polymer note in circulation and issue a new £10 polymer note as planned, despite concerns from activists over traces of ... 19 pictures that will take you back to 1980s Ossett * Police called to reports of man armed with axe in Wakefield ... The Bank of England has said that it will keep the £5 polymer note in circulation and issue a new £10 polymer note as planned, ... "Delaying the issuance of the polymer £10 would also delay the benefits of the increased counterfeit resilience of polymer being ...
Since the 1980s, Cambridge researchers have pioneered the field of polymer semiconductors. Their discoveries have opened up a ...
In the 1980s she used its first reflectometer - Crisp. It is now one of five neutron reflectometers at ISIS. The machines are ... IOM3 Home ⁄ Features ⁄ Studying polymers - neutron scattering and ISIS. Studying polymers - neutron scattering and ISIS. Julia ... Polymers are complex yet common materials that play a vital role in many areas of our lives. For scientists, understanding the ... It was first used to study the structure of polymers in the 1970s. At that time it was a little-known technique, but it has ...
Purchase Fracture Mechanics Testing Methods for Polymers, Adhesives and Composites, Volume 28 - 1st Edition. Print Book & E- ... This book is an overview of ESIS Technical Committee 4s activities since the mid-1980s. A wide range of tests is described and ... Fracture Mechanics Testing Methods for Polymers, Adhesives and Composites, Volume 28 1st Edition. 0 star rating Write a review ... J-fracture toughness of polymers at slow speed (G.E. Hale, F. Ramsteiner). J-fracture toughness of polymers at impact speed (H. ...
1980s Type image Format 8 x 10 in. Source Akron_University_Buildings_Polymer_Science_2a.jpg ... Polymer Building / DEC 12 1989 / Akron U (Building) Polymer Science Center / Polymer center reflects Akron Us growth / Tues. ... It will house four university polymer divisions. The Polymer Science Center is actually two towers - one nine stories tall and ... In the last three years, Akron U has received more than $7.5 million in polymer research grants and contracts from government ...
Such gels, introduced in the late 1980s, are usually water-based emulsions thickened with cellulose or synthetic polymers. By ... In Mexico, polymer coatings were applied to frescoes as late as the 1990s; within ten years it was clear this was a mistake. In ... In addition, the polymers themselves became discoloured and brittle, particularly in hot countries such as Mexico, where they ... Ageing rendered the polymers insoluble to most organic solvents because of oxidation and cross-linking reactions, but Baglioni ...
Polymers are used in everything from nylon stockings to commercial aircraft to artificial heart valves, and they have a ... ... In certain areas of polymer theory, there has been enormous progress in the 1970s and 1980s. Some topics have been so ... Polymer Blends. Multicomponent polymer systems, such as polymer mixtures (blends), provide a new approach to the development of ... Synthesis of Polymers of Controlled End-Group Structure. An increasingly important class of polymers are telechelic polymers, ...
Solvay used the unregulated chemicals in its production process from the 1980s through 2010. There are currently no recognized ... home // News // Paulsboro water contamination brings second lawsuit against Solvay Specialty Polymers // ... Paulsboro water contamination brings second lawsuit against Solvay Specialty Polymers. Source: South Jersey Times , February ... A second lawsuit has been filed against Solvay Specialty Polymers in West Deptford following complaints of water contaminated ...
... but researchers have now made a larger-scale version with polymers. ... But quasicrystals, which were first seen in metallic alloys in the 1980s, arent periodic. They are reminiscent of geometric ... These patterns are organized by star polymers-Y-shaped elements containing all three polymer types joined together at a single ... One of the most complex geometries in these polymers involves triangles and squares in a ratio of 2 to 1. In the past, the team ...
Typically, the following factors have resulted in one company being the sole manufacturer of a polymer:. * High cost of capital ... Moreover, engineers who graduated in the 1980s might not recognize some of the obsolete terms used to describe restricted items ... The 12 classes (a through 1) of polymers indicated in this entry can be categorized as follows:. * Have been commercially ... Further, many of the major manufacturers of polymers in the United States look on themselves as global companies without any ...
When you look at a linear polymer, it can have reactive sites along the chain. Cross-linkers connect linear polymers and create ... In the 1980s, researchers discovered how to create elastomers for the skin care industry. In terms of sebum control, this ... Other mattifying lotions may contain polymers, or plastics, to help aid in sebum absorption. A polymer is a chemical compound ... Silicone polymers, which have been used for decades in skin care products, add emollient, or moisturizing, factors to make the ...
man-made fibre: Gel spinning: Gel spinning is an old technique that has come into use commercially only since the 1980s. As ... In the modern adaptation of this process, polymer…. *gel-permeation chromatography (chemistry). Gel chromatography, in ...
A high number of LCPs, produced in the 1980s, displayed order in the melt phase analogous to that exhibited by nonpolymeric ... Liquid crystallinity in polymers may occur either by dissolving a polymer in a solvent (lyotropic liquid-crystal polymers) or ... Liquid-crystal polymers (LCPs) are a class of aromatic polymers. They are extremely unreactive and inert, and highly resistant ... "Sterrox® liquid-crystal polymer (LCP)". Retrieved 10 July 2018.. *^ Fenlon, Wes (5 June 2018). "Noctua spent four and a half ...
The world has changed considerably since the 1980s, when CAD first started displacing drafting tables. Download Now ... You can find extensive chemical resistance charts for polymers online.. Here is one example: http://www.rtpcompany.com/info/ ...
Both have traditionally used neat polymers without reinforcement.. Comparison of DLP vs SLA. Source , Royal Society of ... DLP projectors and SLA date back to the beginning of 3D printing in the 1980s. DLP printers tend to be larger because they ... Our core thesis is that a step change in performance wont be accomplished by polymer chemistry alone. However, exploiting the ... "We partner with large manufacturers of polymers and tailor the surface chemistry of additives," says Martin. He notes that each ...
The world has changed considerably since the 1980s, when CAD first started displacing drafting tables. Download Now ...
Lewis Acids in Radical-Based Polymer Synthesis The first attempts to control stereochemistry in radical polymerization by the ... with few investigations reported in the 1970s and 1980s. However, following the successful application of LAs in small-molecule ... 4. Lewis Acids in Radical-Based Polymer Synthesis. The first attempts to control stereochemistry in radical polymerization by ...
Various theoretical models and new conductive, but also semi-conductive, polymers followed during the 1980s in the wake of the ... But this only happens after oxidizing the polymer chain a little here and there, for example using iodine. And why is that? The ... In parallel with the development of conducting polymers, there is an ongoing development of what we might call "molecular ... You are being rewarded for your pioneering scientific work on electrically conductive polymers. Your serendipitous discovery of ...
Later studies in the late 1980s, found p-coumaric and its derivatives following degradation of this polymer [46,47,66]. Further ... Examples of these additives are acrylate based polymers, such as Eudragit®, or cellulose based polymers, such as Aquacoat®, a ... which is mainly a polymer known as sporopollenin. This polymer is composed of carbon, hydrogen and oxygen [11] and, although ... The polymer has a very strong lipophilic character, which is probably due the high presence of olefinic and aromatic groups ...
When you dry them, they form a polymer. The wet-dry cycle also creates lipid droplets that encapsulate the polymers. ... In the 1980s, Deamer showed that the ingredients for making these packages would have been readily available on the early Earth ... The idea is that each [droplet] will enclose a mixture of random polymers. Rare protocells may house collections of polymers ... We want to see if we can detect functional polymers among the trillions of random-sequence polymers we generate. ...
It is a polymer of 2-hydroxyethyl methacrylate (HEMA), a clear liquid compound obtained by reacting methacrylic acid (CH2=C[CH3 ... polymer. Polymer. , any of a class of natural or synthetic substances composed of very large molecules, called macromolecules, ... Since the 1980s other hygroscopic (water-absorbing) plastics have been developed, either based on HEMA or incorporating other ... It is a polymer of 2-hydroxyethyl methacrylate (HEMA), a clear liquid compound obtained by reacting methacrylic acid (CH2=C[CH3 ...
Epothilones are a class of cytotoxic macrocyclic compounds originally discovered in the mid-1980s isolated from myxobacteria ... Ultimately, the lead NHOH polymer with the core of D-Phe15/L-Tyr15/D-Leu10, and the lead Cys polymer with the core L-Tyr20/D- ... The polymer used in IT-147, mPEG12K-NH-b-p-[D-Glu(NHOH)5-co-L-Glu(NHOH)5]-b-p-[D-Phe15-co-L-Tyr15-co-D-Leu10]-Ac, was termed ... residues on polymer chains or on disulfide bonds formed between cysteine (Cys) moieties in the polymer chains (Figure 2). The ...
Nanocomposites have been used commercially since Toyota introduced the first polymer/clay nanocomposite auto parts in the 1980s ... Indeed, manufacturers now mix nanoparticulate metals, oxides and other materials with polymers and matrix materials to optimize ...
  • In the construction industry, VINNAPAS ® brand polymer dispersions and dispersible polymer powders ensure that plaster bonds reliably to brickwork and concrete, is easier to work with and, depending on individual requirements, is water repellent as well. (wacker.com)
  • It will concentrate on formulations for dispersible polymer powders and dispersions for modern building applications, e.g. as binders in mortars for energy-saving external thermal insulation composite systems, or for low-odor and low-emissions paints. (coatingsworld.com)
  • Natural and synthetic polymers are composed of many repeating structural units of relatively simple molecules linked together, generally end-to-end, to form long chains. (iom3.org)
  • In some instances, remarkable improvements in solubility (in comparison with linear analogues) have been reported for hyperbranched chains, and there has been plausible speculation that dendritic polymers may have useful sequestration and reactivity properties. (nap.edu)
  • The cohesion of the material is provided solely from the polymer network, and a crack propagates by scissoring the polymer chains along its path. (imechanica.org)
  • The polymer chains associate by intermolecular forces , which weaken rapidly with increased temperature, yielding a viscous liquid. (rug.nl)
  • Modification of the polymer through copolymerization or through the addition of non-reactive side chains to monomers before polymerization can also lower it. (rug.nl)
  • It is well known that the second-order NLO properties originate from non- centrosymmetric alignment of NLO chromophores, either doped as a guest or covalently bonded as side-chains in poled polymers. (washington.edu)
  • Laboratory and in-line dielectric spectroscopy studies of molten polymers revealed the ability to make composition measurements of the comonomer concentration along the polymer chains. (thefreelibrary.com)
  • All polymers are made up of small, repeating units, called monomers, that are linked together chemically into long chains. (hackaday.com)
  • The properties of the monomers, their numbers, and the configuration of the chains largely determine the characteristics of the resulting plastic, and the huge number of combinations of these factors leads to the incredible diversity of polymers in use today. (hackaday.com)
  • In the natural world, these polymers--long chains of repeating units connected by strong chemical bonds--are always in solution in our cells. (ucsc.edu)
  • A hydrogel (also called aquagel) is a three-dimensional macromolecular network of polymer chains that are hydrophilic, sometimes found as colloidal gels in which water is the dispersion medium. (omicsonline.org)
  • Three-dimensional networks are usually formed by chemical or physical crosslinking of hydrophilic polymer chains. (omicsonline.org)
  • In chemical gels, polymer chains are connected by covalent bonds, but in physical gels they are held together by noncovalent bonds, such as van der Waals interactions, ionic interactions, hydrogen bonding , hydrophobic interactions, traces of crystallinity and multiple helices or by molecular entanglements. (omicsonline.org)
  • The British Composites Society covered metals, ceramics and polymer based composites, and when it became clear that an Institute of Materials was to be formed, it agreed it would also join. (iom3.org)
  • With the possible exception of high temperature cure monitoring of composites, applications of dielectric studies to polymer melts in chemical processes are virtually nonexistent. (thefreelibrary.com)
  • Comparing graphene to the high-performance polymer PEEK suggests that graphene's major commercial inflection point is still off in the future - expect graphene to begin to find widespread use in battery electrodes or conductive composites around 2025. (coatingsworld.com)
  • Its core capabilities are polymer chemistry formulation and coating technology. (wikipedia.org)
  • Our core thesis is that a step change in performance won't be accomplished by polymer chemistry alone. (compositesworld.com)
  • This article describes the course design and teaching methodology for a polymer chemistry and applications lecture class specifically aimed at small college and university instruction. (nsta.org)
  • This intermediate course for advanced undergraduates and masters-level graduate students focuses on teaching the basics of polymer history, synthesis, and characterization with connections to the core chemistry curriculum in a small-class-size environment and without a textbook. (nsta.org)
  • P olymer science is typically underrepresented in small colleges' or universities' chemistry curricula even though almost half of all chemists will work in this field at some point in their careers, especially those colleges with less emphasis on research programs (https://www.acs.org/content/ acs/en/careers/college-to-career/ chemistry-careers/polymers.html). (nsta.org)
  • One of the major limitations to adding instruction in polymer education dating back to at least the 1950s is that colleges traditionally stick to the core disciplines of chemistry including organic chemistry, inorganic chemistry, analytical chemistry, physical chemistry, and biochemistry for hiring, course purposes, and degree requirements, even if the professors have a PhD and/or postdoctoral training in other areas including polymers/macromolecules. (nsta.org)
  • open.edu/openlearn/science-mathstechnology/science/chemistry/intro duction-polymers/content-section0?active-tab=description-tab). (nsta.org)
  • This article describes the design and teaching methodology of a polymer chemistry course for advanced undergraduates and masters-level graduate students at small, primarily undergraduate institutions (PUIs), a course that could be taught by any savvy chemistry professor outside of polymers, an instructor with a background in polymer chemistry, or a knowledgeable adjunct. (nsta.org)
  • But polymerization was still a challenge in those halcyon early years of plastics chemistry, when chemists lacked the processes that would enable targeted manufacturing of polymers. (wacker.com)
  • The shape memory effect involved in SMAs was not known for any organic materials including SMPs although organic materials do have extendibility in various kinds of polymers in developing functional material chemistry. (rsc.org)
  • Its seminar program is accordingly designed to address the particular needs of the markets in South Korea, and provides customers and business partners with an opportunity to learn about all relevant aspects of modern polymer and silicone chemistry and their applications. (coatingsworld.com)
  • It was first used to study the structure of polymers in the 1970s. (iom3.org)
  • 140 Given these initially underwhelming results, LA-mediated radical polymerization remained relatively unexplored, with few investigations reported in the 1970s and 1980s. (oreilly.com)
  • It was developed by John Goodenough , Rachid Yazami and Akira Yoshino in the 1980s, building on a concept proposed by M Stanley Whittingham in the 1970s, and it was commercialized by Sony and Asahi Kasei in 1991. (wikipedia.org)
  • With images of the oil embargoes of the 1970s fresh in their minds and the need for an alternative to petroleum as a feedstock for the polymer industry, husband and wife chemists Pat and Sally Gruber attacked the PLA problem, often running trial batches on their kitchen stove. (hackaday.com)
  • Many of these problems involve complex mixtures of components and understanding the flow and processing of so-called soft matter (which includes polymers but also emulsions and gels) in industrial processes. (iom3.org)
  • Regular gels that are weak and brittle are often built upon a single type of polymer network. (imechanica.org)
  • The market place has responded with over 100 occlusive dressings, including the polyurethane and hydrocolloid dressings , as well as water-based hydrogel dressings, polymer foams, pastes and gels used to fill in wound cavities, and combinations of the above. (thefreedictionary.com)
  • A thermoplastic , or thermosoftening plastic , is a plastic polymer material that becomes pliable or moldable at a certain elevated temperature and solidifies upon cooling. (rug.nl)
  • While most polyurethanes are thermosetting polymers that do not melt when heated, thermoplastic polyurethanes are also available. (wikipedia.org)
  • In the deformation process, SMPs require only a slight stress due to the properties of organic polymer solids, and they reveal a smaller recovery force during the thermoplastic process whereas SMAs require a relatively large stress due to metallic properties, and they thermally tighten to generate a larger recovery force via destabilization of the stress-induced phase. (rsc.org)
  • A unique class of partially crystalline aromatic polyesters based on p-hydroxybenzoic acid and related monomers , liquid-crystal polymers are capable of forming regions of highly ordered structure while in the liquid phase. (wikipedia.org)
  • Polymer electrolyte membrane (PEM) fuel cellsalso called proton exchange membrane fuel cellsdeliver high-power density and offer the advantages of low weight and volume, compared with other fuel cells. (scribd.com)
  • The application segment is further classified into transportation, stationary hydrogen power plants and portable power plant.The technology segment is further classified into solid oxide fuel cells (SOFC), phosphoric acid fuel cells (PAFC), molten carbonate fuel cells (MCFC), direct methanol fuel cells (DMFC) and polymer/proton exchange membrane fuel cells (PEMFC). (marketresearch.com)
  • Neutron scattering underpins advances in polymer science. (iom3.org)
  • The efforts of a growing neutron community, and continued advances in instrumentation at ISIS, will ensure polymers are better understood and that new discoveries continue to be made. (iom3.org)
  • We will show that mathematical advances from the 1980s allow to obtain analytical results in a large range of salt content. (u-psud.fr)
  • The chemist and entrepreneur Walter Kalkhof-Rose was a supporting member of the MPG from 1960 to 1988 and maintained a close friendship with Prof. Gerhard Wegner, emeritus founding director of the MPI for Polymer Research. (mpg.de)
  • It was first discovered by American polymer chemist Carl Shipp Marvel in the pursuit of new materials with superior stability, retention of stiffness, toughness at elevated temperature. (rug.nl)
  • Mother Nature is a surprisingly good polymer chemist. (hackaday.com)
  • DeSimone, a polymer chemist, helped invent these machines, and he still gets a kick out of watching them work. (technologyreview.com)
  • Before he founded Carbon in 2013, DeSimone spent more than 20 years as a polymer chemist at the University of North Carolina. (technologyreview.com)
  • Nanowerk News ) The organic polymer PEDOT is probably one of the world s most intensely studied materials. (nanowerk.com)
  • More than 1,500 scientific articles are devoted each year to the conducting organic polymer PEDOT, making it probably one of the world s most intensely studied materials. (nanowerk.com)
  • A second lawsuit has been filed against Solvay Specialty Polymers in West Deptford following complaints of water contaminated in Paulsboro stemming from the plastics plant. (fluoridealert.org)
  • Other mattifying lotions may contain polymers, or plastics, to help aid in sebum absorption. (howstuffworks.com)
  • The new polymers had some advantages over existing plastics that were made by polymerizing olefins or by polycondensation , and were not covered by patents obtained by Wallace Carothers on polyesters . (wikipedia.org)
  • Consumer plastics mainly comprise polymers such as polypropylene, high and low density polyethylene, and vinyl chloride. (niir.org)
  • Brian Amsden, along with scientists from the University of Western Ontario and University of Toronto, is currently trying to develop microscopic polymer fibres to help rebuild human tissue and speed the healing process. (thaindian.com)
  • But quasicrystals, which were first seen in metallic alloys in the 1980s, aren't periodic. (aps.org)
  • Shape-memory materials, i.e. , polymers (SMPs: shape-memory polymers) and alloys (SMAs: shape-memory alloys), have been developed in very different ways since they are historically far apart in material type as well as physical property. (rsc.org)
  • Shape-memory materials are fascinating materials that regain their original shapes from mechanically deformed states and are categorized into polymers and metal alloys. (rsc.org)
  • Shape-memory polymers 1 (SMPs) are rather flexible and work via thermal relaxation of the polymer to show their hidden tensility via the positional reversion of embedded linkup or stable bundling points, whereas shape-memory alloys 2 (SMAs) are stiff and transform to gain enough recovery force to overpower stiffness via thermal phase destabilization of the stress-induced domains. (rsc.org)
  • Until the 1980s, water absorbing materials were cellulose or fiber-based products with, at most, an absorption capacity of about 20 times their weight. (buhlergroup.com)
  • Below speculates that as well as drawing in positively charged ions, the polymer may dislodge phosphorus that would otherwise be inaccessible to plants because it stays rigidly bound to soil particles in the form of phosphate. (newscientist.com)
  • In general, heparosan-modification attributes include: the ease of generating a larger size range of monodisperse polymers, high water solubility, biocompatibility of degradation products, easy removal of polymer vehicle for analysis of cargo purity and activity, lack of accumulation in tissues, reduced immunogenicity, and new intellectual property. (drug-dev.com)
  • They are typically fueled with pure hydrogen supplied from storage tanks or on-board reformers.Polymer electrolyte membrane fuel cells operate at relatively low temperatures, around 80C (176F). (scribd.com)
  • The fuel cells are presently being studied and developed in Japan and some of them are Phosphoric Acid Fuel Cell (PAFC), Polymer Electrolyte Fuel Cell (PEFC), Solid Oxide Fuel Cell (SOFC) and Molten Carbonate Fuel Cell (MCFC). (marketresearch.com)
  • Polymers are complex yet common materials that play a vital role in many areas of our lives. (iom3.org)
  • They have appeared in metals and a few other materials, but now a team reports in the 11 May Physical Review Letters that quasicrystals can also form in polymers. (aps.org)
  • Environments that deteriorate the polymers are high-temperature steam, concentrated sulfuric acid , and boiling caustic materials. (wikipedia.org)
  • Increasingly, these courses were broadening to cover many different materials, other than concentrating specifically on metallurgy, polymers or ceramics. (iom3.org)
  • He is also the main author of an article in ACS Applied Polymer Materials ( 'Polarons, Bipolarons, and Absorption Spectroscopy of PEDOT' ) that presents a new theory of electronic structure and optical properties of PEDOT that overturns a large part of the corresponding previous research into PEDOT. (nanowerk.com)
  • Our results can also be applied to many other conducting polymer materials , says Igor Zozoulenko. (nanowerk.com)
  • Conducting polymers are versatile materials for creation of biosensors due to their rapid production, controlled thickness, and porosity, as well as easy electropolymerization on various surfaces. (springer.com)
  • Recently, as the knowledge base of polymeric materials widened, new functions for polymers have been actively investigated. (washington.edu)
  • Nonlinear optical (NLO) materials, especially organic and polymeric ones, have continued to be at the forefront of research activities since the mid-1980s. (washington.edu)
  • The technology was first developed in the 1980s, when such printers were expensive and temperamental, and materials were limited. (qualitydigest.com)
  • The printers then build the models, layer by layer, sometimes using an inkjet to deposit droplets of resin that are fixed into place by shining UV light, or by extruding polymer ribbons that harden once they're released. (qualitydigest.com)
  • The spacing between the polymer structures is 100 times larger than between atoms, so it's difficult to apply the quantum mechanical theories from previous quasicrystals to this new type. (aps.org)
  • The spatial extent of the polymer pattern is small, so it might be a mixture of misaligned crystal-like structures, rather than a true quasicrystal, says Christopher Henley of Cornell University. (aps.org)
  • According to Dotera, these polymer structures are of a size that could lead to new types of photonic crystals-structures that can manipulate light for possible future devices, such as optical chips that would use "light circuits" instead of electrons. (aps.org)
  • A polymer is a chemical compound made up of repeating structural units, and they come in a variety of structures. (howstuffworks.com)
  • Well-defined catalyst systems are now at hand and facilitate the understanding of basic reaction mechanisms and correlations between catalyst structures, polymer microstructures, and polymer properties. (worldcat.org)
  • 1980s, when Hap Wheeler, professor of biological sciences at Clemson University in South Carolina, was studying mineral structures in shells of the American oyster (Crassostrea virginica). (newscientist.com)
  • Resonance structures of the peptide bond that links individual amino acids to form a protein polymer . (wikidoc.org)
  • To date, there are no biomaterials in clinical use that possess both the safety of the polymers and ECM-like 3-dimensional environments for cells. (go.jp)
  • The liver detoxification system can create a variety of reactive PEG metabolites that are cytotoxic.5-7 In contrast, Caisson's heparosan system, HEPtune, uses natural heparosan polymers, which are degraded into normal sugars and recycled, and thus should possess substantially lower toxicity. (drug-dev.com)
  • The Influence of Polymer Binders on the Performance of Cathodes for Lithium-Ion Batteries. (ebscohost.com)
  • A systematic electrochemical investigation is performed to study the effect of polyvinylidene difluoride (PVDF) based polymer binders on the performance of different cathodes for lithium-ion batteries in ionic liquid (IL) based electrolytes. (ebscohost.com)
  • Strategies include aqueous lithium-ion batteries , ceramic solid electrolytes, polymer electrolytes, ionic liquids, and heavily fluorinated systems. (wikipedia.org)
  • Liquid-crystal polymers come in a variety of forms from sinterable high temperature to injection moldable compounds. (wikipedia.org)
  • The recovery process planned for this project involved adapting two independent processes, the injection of polymer as a channel blocker or as a deep-penetrating permeability modifier, and the stabilization of clays and reduction of the residual oil saturation in the near-wellbore area around the injection wells. (unt.edu)
  • It was determined that future polymer injection would not be affected by the clay. (unt.edu)
  • The long-term test was designed for three phases: (1) 77 days of injection of a 300-mg/l cationic polyacrylamide, (2) 15 days of injection of a 300-mg/l anionic polymer to ensure injectivity of the polymer, and (3) 369 days of injection of the 300-mg/l anionic polymer and a 30:1 mix of the crosslinker. (unt.edu)
  • The stabilization of the oil at prepolymer rates and water production at the lower rates can be attributed to the polymer injection, but the effect was not as great as originally predicted. (unt.edu)
  • In this state, thermoplastics may be reshaped and are typically used to produce parts by various polymer processing techniques such as injection molding , compression molding , calendering , and extrusion . (rug.nl)
  • Modern polymer banknotes were first developed by the Reserve Bank of Australia (RBA), Commonwealth Scientific and Industrial Research Organisation (CSIRO) and The University of Melbourne. (wikipedia.org)
  • Neutron scattering is a research technique that has significantly contributed to the understanding of polymers. (iom3.org)
  • Research in the UK will continue to be at the forefront of polymer science. (iom3.org)
  • In the last three years , Akron U has received more than $7.5 million in polymer research grants and contracts from government agencies and corporations . (summitmemory.org)
  • Nanocomposites have been used commercially since Toyota introduced the first polymer/clay nanocomposite auto parts in the 1980s,' says BCC Research nanotechnology analyst Andrew McWilliams. (prweb.com)
  • While commercial, silicon-based solar cells turn about 20 percent of sunlight into electricity and experimental units top 25 percent, there's been an undercurrent of research into polymer-based cells that could greatly reduce the cost of solar energy, Verduzco said. (kurzweilai.net)
  • Thanks to the great support of the Kalkhof-Roses, long-time patrons of the MPG, the MPI for Polymer Research in Mainz was able to inaugurate a new laboratory. (mpg.de)
  • This work at the MPI for Polymer Research convinced Sibylle Kalkhof-Rose (born 1925) so much that she supported the research of Tanja Weil financially for almost two years. (mpg.de)
  • Together, they worked hard to establish polymer research at the Max Planck Institute in Mainz in the 1980s. (mpg.de)
  • Tissue engineering, first conceived in the 1980s, is now drawing tremendous social attention as the research progresses. (go.jp)
  • The regional competence center now houses under a single roof both research and development (R&D), applications technology, and a facility for basic and advanced training in silicones and polymers applications. (coatingsworld.com)
  • The Imperial Chemical Industries Ltd. (1980s) was the first to do intensive studies on PHB in multiple research areas, including genetic engineering, biotechnology, and the enzymes responsible for biosynthesis and biodegradation. (kenyon.edu)
  • Dotera's simulations suggested that adding more of one of the polymer ingredients would generate more triangles and distort the polymer pattern towards a quasicrystal. (aps.org)
  • That cycle could have concentrated the necessary ingredients - including both lipids and the building blocks for RNA - and provided the energy needed to stitch those building blocks into biological polymers. (businessinsider.com)
  • Many different drug delivery technologies, including liposomes, degradable polyester particles, and polymer micelles, have been investigated both preclinically and clinically, but few have achieved FDA approval [ 23 ]. (hindawi.com)
  • The cyanoacrylate polymer particles, which do not contain antibiotics or antibacterial agents, bond with the cell wall of drug-resistant bacteria, and then induced an auto-destructive behavior that causes the bacteria to destroy itself. (omicsonline.org)
  • In 1996 Australia switched completely to polymer banknotes. (wikipedia.org)
  • For dry polymers, the second means of dissipation is crystallization and viscoelastic dissipation of the highly stretched polymer network in front of crack tip due to interaction between closely packed chain strands, which is strongly rate dependent with the magnitude ranging from 0 to 105 J/m2 (Gent, 1996). (imechanica.org)
  • Wacker has been supplying chemicals to Korea since the mid-1980s, and Wacker Chemicals Korea was set up in 1996 as a local subsidiary. (coatingsworld.com)
  • With a layer of aluminum on the other side of the device constructed by the Penn State team, the polymer bands stretched from the top to bottom electrodes and provided a clear path for electrons to flow. (kurzweilai.net)
  • This polymer has unique properties, and is highly suitable for use in solar cells, electrodes, light-emitting diodes, soft displays, bioelectronic components, and many other applications. (nanowerk.com)
  • Solvay used the unregulated chemicals in its production process from the 1980s through 2010. (fluoridealert.org)
  • Since the 1980s, outstanding scientific innovations and process improvements have revolutionized polyolefin technology and greatly simplified polymerization processes. (worldcat.org)
  • The polymerization process used at WACKER, which, for the first time, made it possible to adjust the polymer emulsion viscosity to particular requirements, has been patented since April 1, 1938. (wacker.com)
  • PEGylation, a technology developed in the 1970-1980s, is a FDAapproved process adding poly[ethylene glycol] (PEG) to a therapeutic cargo including proteins and liposomes. (drug-dev.com)