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Safety Gear
Personal protective equipment (PPE) is protective clothing, helmets, goggles, or other garments or equipment designed to protect the wearer's body from injury or infection. The hazards addressed by protective equipment include physical, electrical, heat, chemicals, biohazards, and airborne particulate matter. Protective equipment may be worn for job-related occupational safety and health purposes, as well as for sports and other recreational activities. ''Protective clothing'' is applied to traditional categories of clothing, and ''protective gear'' applies to items such as pads, guards, shields, or masks, and others. PPE suits can be similar in appearance to a cleanroom suit. The purpose of personal protective equipment is to reduce employee exposure to hazards when engineering controls and administrative controls are not feasible or effective to reduce these risks to acceptable levels. PPE is needed when there are hazards present. PPE has the serious limitation that it doe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hazmat DEA
Dangerous goods, abbreviated DG, are substances that when transported are a risk to health, safety, property or the environment. Certain dangerous goods that pose risks even when not being transported are known as hazardous materials ( syllabically abbreviated as HAZMAT or hazmat). An example for dangerous goods is hazardous waste which is waste that has substantial or potential threats to public health or the environment. Hazardous materials are often subject to chemical regulations. Hazmat teams are personnel specially trained to handle dangerous goods, which include materials that are radioactive, flammable, explosive, corrosive, oxidizing, asphyxiating, biohazardous, toxic, pathogenic, or allergenic. Also included are physical conditions such as compressed gases and liquids or hot materials, including all goods containing such materials or chemicals, or may have other characteristics that render them hazardous in specific circumstances. Dangerous goods are often indicat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hazard Substitution
Hazard substitution is a hazard control strategy in which a material or process is replaced with another that is less hazardous. Substitution is the second most effective of the five members of the hierarchy of hazard controls in protecting workers, after elimination. Substitution and elimination are most effective early in the design process, when they may be inexpensive and simple to implement, while for an existing process they may require major changes in equipment and procedures. The concept of prevention through design emphasizes integrating the more effective control methods such as elimination and substitution early in the design phase. Hazard substitutions can involve not only changing one chemical for another, but also using the same chemical in a less hazardous form. Substitutions can also be made to processes and equipment. In making a substitution, the hazards of the new material should be considered and monitored, so that a new hazard is not unwittingly introdu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reflectance
The reflectance of the surface of a material is its effectiveness in reflecting radiant energy. It is the fraction of incident electromagnetic power that is reflected at the boundary. Reflectance is a component of the response of the electronic structure of the material to the electromagnetic field of light, and is in general a function of the frequency, or wavelength, of the light, its polarization, and the angle of incidence. The dependence of reflectance on the wavelength is called a ''reflectance spectrum'' or ''spectral reflectance curve''. Mathematical definitions Hemispherical reflectance The ''hemispherical reflectance'' of a surface, denoted , is defined as R = \frac, where is the radiant flux ''reflected'' by that surface and is the radiant flux ''received'' by that surface. Spectral hemispherical reflectance The ''spectral hemispherical reflectance in frequency'' and ''spectral hemispherical reflectance in wavelength'' of a surface, denoted and respectively, are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manchurian Plague
The Manchurian plague was a pneumonic plague that occurred mainly in Manchuria in 1910–1911. It killed 60,000 people, stimulating a multinational medical response and the wearing of the first personal protective equipment (PPE). __TOC__ History The plague is thought to have originated from a tarbagan marmot infected with bacterial pneumonia. Tarbagan marmots were hunted for their fur in Manchuria. It was an airborne spread disease and was incredibly deadly, with a near 100 percent mortality rate. Its spread was magnified by marmot hunters gathering in the bitter winter months, and the eventual travel of migrant workers during the Chinese New Year. Russia and Japan both had economic interests in the region and needed to cooperate with Chinese authorities. The Cambridge-trained doctor Wu Lien-teh led Chinese efforts to end the plague, and promoted quarantine and the wearing of cloth face masks. He also convened the International Plague Conference in Mukden in April 1911, the fi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wu Lien-teh
Wu Lien-teh (; Goh Lean Tuck and Ng Leen Tuck in Minnan and Cantonese transliteration respectively; 10 March 1879 – 21 January 1960) was a Malayan physician renowned for his work in public health, particularly the Manchurian plague of 1910–11. He is the inventor of the Wu mask, which is the forerunner of today's N95 respirator. Wu was the first medical student of Chinese descent to study at the University of Cambridge. He was also the first Malayan nominated for the Nobel Prize in Physiology or Medicine, in 1935. Life and education Wu was born in Penang, one of the three towns of the Straits Settlements (the others being Malacca and Singapore), currently as one of the states of Malaysia. The Straits Settlements formed part of the colonies of the United Kingdom. His father was a recent immigrant from Taishan, China, and worked as a goldsmith. Wu's mother's was of Hakka heritage and was a second-generation Peranakan born in Malaya. Wu had four brothers and six sisters. H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cloth Facemask
A cloth face mask is a mask made of common textiles, usually cotton, worn over the mouth and nose. When more effective masks are not available, and when physical distancing is impossible, cloth face masks are recommended by public health agencies for disease "source control" in epidemic situations to protect others from virus laden droplets in infected mask wearers' breath, coughs, and sneezes. Because they are less effective than N95 masks, surgical masks, or physical distancing in protecting the wearer against viruses, they are not considered to be personal protective equipment by public health agencies. They are used by the general public in household and community settings as protection against both infectious diseases and particulate air pollution. Cloth face masks were routinely used by healthcare workers starting from the late 19th century until the mid 20th century. In the 1960s they fell out of use in the developed world in favor of disposable surgical masks with an e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prescientific
__NOTOC__ In the philosophy of science, there are several definitions of protoscience. Its simplest meaning (most closely reflecting its roots of ''proto-'' + ''science'') involves the earliest eras of the history of science, when the scientific method was still nascent. The term can also be applied to modern emerging fields of study. Prescientific protoscience The term ''prescientific'' means at root "relating to an era before science existed". For example, traditional medicine existed for thousands of years before medical science did, and thus many aspects of it can be described as prescientific. In a related sense, protoscientific topics (such as the alchemy of Newton's day) can be called prescientific, in which case the ''proto-'' and ''pre-'' labels can function more or less synonymously (the latter focusing more sharply on the idea that nothing but science is science). Compared to fringe science, which is considered highly speculative or even strongly refuted, some protoscien ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miasma Theory
The miasma theory (also called the miasmatic theory) is an obsolete medical theory that held that diseases—such as cholera, chlamydia, or the Black Death—were caused by a ''miasma'' (, Ancient Greek for 'pollution'), a noxious form of "bad air", also known as night air. The theory held that epidemics were caused by miasma, emanating from rotting organic matter. Though miasma theory is typically associated with the spread of contagious diseases, some academics in the early nineteenth century suggested that the theory extended to other conditions as well, e.g. one could become obese by inhaling the odor of food. The miasma theory was advanced by Hippocrates in the fourth century B.C. and accepted from ancient times in Europe and China. The theory was eventually abandoned by scientists and physicians after 1880, replaced by the germ theory of disease: specific germs, not miasma, caused specific diseases. However, cultural beliefs about getting rid of odor made the clean-up of w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water-resistant
Waterproofing is the process of making an object or structure waterproof or water-resistant so that it remains relatively unaffected by water or resisting the ingress of water under specified conditions. Such items may be used in wet environments or underwater to specified depths. ''Water-resistant'' and ''waterproof'' often refer to resistance to penetration of water in its liquid state and possibly under pressure, whereas '' damp proof'' refers to resistance to humidity or dampness. Permeation of water vapour through a material or structure is reported as a moisture vapor transmission rate (MVTR). The hulls of boats and ships were once waterproofed by applying tar or pitch. Modern items may be waterproofed by applying water-repellent coatings or by sealing seams with gaskets or o-rings. Waterproofing is used in reference to building structures (such as basements, decks, or wet areas), watercraft, canvas, clothing (raincoats or waders), electronic devices and paper packa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plague (disease)
Plague is an infectious disease caused by the bacterium ''Yersinia pestis''. Symptoms include fever, weakness and headache. Usually this begins one to seven days after exposure. There are three forms of plague, each affecting a different part of the body and causing associated symptoms. Pneumonic plague infects the lungs, causing shortness of breath, coughing and chest pain; bubonic plague affects the lymph nodes, making them swell; and septicemic plague infects the blood and can cause tissues to turn black and die. The bubonic and septicemic forms are generally spread by flea bites or handling an infected animal, whereas pneumonic plague is generally spread between people through the air via infectious droplets. Diagnosis is typically by finding the bacterium in fluid from a lymph node, blood or sputum. Those at high risk may be vaccinated. Those exposed to a case of pneumonic plague may be treated with preventive medication. If infected, treatment is with antibiotic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plague Doctor Costume
The clothing worn by plague doctors was intended to protect them from airborne diseases during outbreaks of bubonic plague in Europe. * Pommerville (Body Systems), p. 15 * Bauer, p. 145 * Byfield, p. 26 * Glaser, pp. 33-34 It is often seen as a symbol of death and disease. However, the costume was worn by a comparatively small number of late Renaissance and early modern physicians studying and treating plague patients. Description The typical costume consists of an ankle-length overcoat and a bird-like beak mask, often filled with sweet or strong-smelling substances (commonly lavender), along with gloves, boots, a wide-brimmed hat, and an outer over-clothing garment.* Pommerville (Body Systems), p. 15 * Bauer, p. 145 * Byfield, p. 26 * Glaser, pp. 33-34 The typical mask had glass openings for the eyes and a curved beak shaped like a bird's beak with straps that held the beak in front of the doctor's nose.Ellis, p. 202 The mask had two small nose holes and was a type of respirato ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plague Doctor
A plague doctor was a physician who treated victims of bubonic plague during epidemics mainly in the 16th and 17th centuries. These physicians were hired by cities to treat infected patients regardless of income, especially the poor that could not afford to pay. Plague doctors had a mixed reputation, with some citizens seeing their presence as a warning to leave the area or that death was near. Some plague doctors were said to charge patients and their families additional fees for special treatments or false cures. In many cases these doctors were not experienced physicians or surgeons, instead being volunteers, second-rate doctors, or young doctors just starting a career. In one case, a plague doctor was a fruit salesman before his employment as a physician. Plague doctors rarely cured patients, instead serving to record death tolls and the number of infected people for demographic purposes. In France and the Netherlands, plague doctors often lacked medical training and were refe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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