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Water Gas
Water gas is a kind of fuel gas, a mixture of carbon monoxide and hydrogen. It is produced by "alternately hot blowing a fuel layer okewith air and gasifying it with steam". The caloric yield of this is about 10% of a modern syngas plant. Further making this technology unattractive, its precursor coke is expensive, whereas syngas uses cheaper precursor, mainly methane from natural gas. Production Synthesis gas is made by passing steam over a red-hot carbon fuel such as coke: : (ΔH = +131 kJ/mol) The reaction is endothermic, so the fuel must be continually re-heated to maintain the reaction. To do this, an air stream, which alternates with the vapor stream, is introduced to combust some of the carbon: : (ΔH = -393 kJ/mol) Theoretically, to make 6 L of water gas, 5 L of air is required. Alternatively, to prevent contamination with nitrogen, energy can be provided by using pure oxygen to burn carbon into carbon monoxide. : (ΔH = -221 kJ/mol) In this case, 1&nbs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fuel Gas
Fuel gas is any one of a number of fuels that under ordinary conditions are gaseous. Most fuel gases are composed of hydrocarbons (such as methane or propane), hydrogen, carbon monoxide, or mixtures thereof. Such gases are sources energy that can be readily transmitted and distributed through pipes. Fuel gas is contrasted with liquid fuels and from solid fuels, although some fuel gases are liquefied for storage or transport (for example, autogas). While their gaseous nature has advantages, avoiding the difficulty of transporting solid fuel and the dangers of spillage inherent in liquid fuels, it also has limitation. It is possible for a fuel gas to be undetected and cause gas explosion. For this reason, odorizers are added to most fuel gases. The most common type of fuel gas in current use is natural gas. Types There are two broad classes of fuel gases, based not on their chemical composition, but their source and the way they are produced: those found naturally, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pneumatic Institution
The Pneumatic Institution (also referred to as Pneumatic Institute) was a medical research facility in Bristol, England, in 1799–1802. It was established by physician and science writer Thomas Beddoes to study the medical effects of gases, known as factitious airs, that had recently been discovered. Humphry Davy headed the Institution's laboratory, examining the effects of laughing gas on himself and others, and James Watt designed much of the lab's equipment. History Preliminaries After Lavoisier had established the role of oxygen in animal respiration, members of the Lunar Society, such as Joseph Priestley (who had co-discovered oxygen), originated pneumatic chemistry, which eventually led to the establishment of the Pneumatic Institution. Georgiana, Duchess of Devonshire, who was unusually educated about Chemistry, visited Thomas Beddoes in his laboratory in Hope Square, Bristol, in December 1793. He had set it up earlier that year to study possible medical uses of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coal Gas
Coal gas is a flammable gaseous fuel made from coal and supplied to the user via a piped distribution system. It is produced when coal is heated strongly in the absence of air. Town gas is a more general term referring to manufactured gaseous fuels produced for sale to consumers and municipalities. The original coal gas was produced by the coal gasification reaction, and thus the burnable component consisted of a roughly equal molecular mixture of carbon monoxide and hydrogen. Thus, coal gas was highly toxic. Other compositions contain additional calorific gases such as methane, produced by the Fischer-Tropsch process, and volatile hydrocarbons together with small quantities of non-calorific gases such as carbon dioxide and nitrogen. Prior to the development of natural gas supply and transmission—during the 1940s and 1950s in the United States and during the late 1960s and 1970s in the United Kingdom and Australia—almost all gas for fuel and lighting was manufactured fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thaddeus S
Thaddeus (Latin ''Thaddaeus'', Ancient Greek Θαδδαῖος ''Thaddaĩos'', from Aramaic תדי ''Ṯaday'') is a male given name. As of the 1990 Census, ''Thaddeus'' was the 611th most popular male name in the United States, while ''Thad'', its diminutive version, was the 846th most popular. Alternate forms *Taco – Dutch *Tadeu ( ind. Tade) – Albanian *Թադէոս ("Tadeos"), Թադևոս ("Tadevos"), Թաթոս ("Tatos") – Armenian *Tadija – Croatian *Tadeáš – Czech *Thaddée – French *თადეოზი (''tadeozi'') Georgian *Thaddäus – German *Tádé – Hungarian *Tadáias (Biblical), Tadhg (given name) – Irish * Taddeo, Tadzio – Italian *Tadejs – Latvian * Tadas – Lithuanian *Thadhewoos – Malayalam *Tadeusz – Polish *Tadeu – Portuguese *Тадэвуш ("Tadevush") – Belarusian *Фаддей ("Faddey") or Фадей ("Fadey") – Russian *Фадей ("Fadey") – Ukrainian *Тадеј (Tadej), Тадија (Tadija) – Se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Claude Bernard
Claude Bernard (; 12 July 1813 – 10 February 1878) was a French physiologist. Historian I. Bernard Cohen of Harvard University called Bernard "one of the greatest of all men of science". He originated the term '' milieu intérieur'', and the associated concept of homeostasis (the latter term being coined by Walter Cannon). Life and career Bernard was born in 1813 in the village of Saint-Julien near Villefranche-sur-Saône. He received his early education in the Jesuit school of that town, and then proceeded to the college at Lyon, which, however, he soon left to become assistant in a druggist's shop. He is sometimes described as an agnostic and even humorously referred to by his colleagues as a "great priest of atheism". Despite this, after his death Cardinal Ferdinand Donnet claimed Bernard was a fervent Catholic, with a biographical entry in the ''Catholic Encyclopedia''. His leisure hours were devoted to the composition of a vaudeville comedy, and the success it achieve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carbon Monoxide-releasing Molecules
Carbon monoxide-releasing molecules (CORMs) are chemical compounds designed to release controlled amounts of carbon monoxide (CO). CORMs are being developed as potential therapeutic agents to locally deliver CO to cells and tissues, thus overcoming limitations of CO gas inhalation protocols. CO is best known for its toxicity in carbon monoxide poisoning at high doses. However, CO is a gasotransmitter and supplemental low dosage of CO has been linked to therapeutic benefits. Pre-clinical research has focused on CO's anti-inflammatory activity with significant applications in cardiovascular disease, oncology, transplant surgery, and neuroprotection. History The simplest source of CO is from a combustion reaction via burning sources such as fossil fuels or fire wood. Sources releasing CO upon thermal decomposition or combustion are generally not considered CORMs. Therapeutic interest in CO dates back to the study of factitious airs ( hydrocarbonate) in the 1790s by Thomas Bed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James Lind (physician, Born 1736)
James Lind FRS FRSE FRCPE (1736–1812) was a Scottish natural philosopher and physician. Life James Lind was born in Gorgie, Edinburgh on 17 May 1736. He studied medicine at Edinburgh University under William Cullen and Joseph Black, and graduated in 1768. In 1766, he then joined the East India Company as surgeon. In 1768 he received his doctorate (MD) from Edinburgh upon completing a dissertation on marsh fever (malaria) in Bengal. On 6 November 1770 he was admitted a Fellow of the College of Physicians, Edinburgh. Lind was also a corresponding member of the Lunar Society. Personality Lind is widely regarded as having an eccentric personality, and considered to be reckless with spending money as captured by the following dialogue: "Why, Dr. Lind, you spend a whole seas of gold", to which Lind replied, "Madam, 'tis true, my very name, behold, Begins with pounds and ends, alas, with pence" Charles Burney described Lind as extremely thin, tall, with grey hair as seen ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spasm
A spasm is a sudden involuntary contraction of a muscle, a group of muscles, or a hollow organ such as the bladder. A spasmodic muscle contraction may be caused by many medical conditions, including dystonia. Most commonly, it is a muscle cramp which is accompanied by a sudden burst of pain. A muscle cramp is usually harmless and ceases after a few minutes. It is typically caused by ion imbalance or muscle overload. There are other causes of involuntary muscle contractions, and some of these may cause a health problem. Description and causes Various kinds of involuntary muscle activity may be referred to as a "spasm". A spasm may be a muscle contraction caused by abnormal nerve stimulation or by abnormal activity of the muscle itself. A spasm may lead to muscle strains or tears in tendons and ligaments if the force of the spasm exceeds the tensile strength of the underlying connective tissue. This can occur with a particularly strong spasm or with weakened connective ti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrothorax
Hydrothorax is a type of pleural effusion in which transudate accumulates in the pleural cavity. This condition is most likely to develop secondary to congestive heart failure, following an increase in hydrostatic pressure within the lungs. More rarely, hydrothorax can develop in 10% of patients with ascites which is called hepatic hydrothorax. It is often difficult to manage in end-stage liver failure and often fails to respond to therapy. Pleural effusions may also develop following the accumulation of other fluids within the pleural cavity; if the fluid is blood it is known as hemothorax (as in major chest injuries), if the fluid is pus it is known as pyothorax (resulting from chest infections), and if the fluid is lymph it is known as chylothorax (resulting from rupture of the thoracic duct). Treatment Treatment of hydrothorax is difficult for several reasons. The underlying condition needs to be corrected; however, often the source of the hydrothorax is end stage liver dis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pneumonia
Pneumonia is an inflammatory condition of the lung primarily affecting the small air sacs known as alveoli. Symptoms typically include some combination of productive or dry cough, chest pain, fever, and difficulty breathing. The severity of the condition is variable. Pneumonia is usually caused by infection with viruses or bacteria, and less commonly by other microorganisms. Identifying the responsible pathogen can be difficult. Diagnosis is often based on symptoms and physical examination. Chest X-rays, blood tests, and culture of the sputum may help confirm the diagnosis. The disease may be classified by where it was acquired, such as community- or hospital-acquired or healthcare-associated pneumonia. Risk factors for pneumonia include cystic fibrosis, chronic obstructive pulmonary disease (COPD), sickle cell disease, asthma, diabetes, heart failure, a history of smoking, a poor ability to cough (such as following a stroke), and a weak immune system. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hemoptysis
Hemoptysis is the coughing up of blood or blood-stained mucus from the bronchi, larynx, trachea, or lungs. In other words, it is the airway bleeding. This can occur with lung cancer, infections such as tuberculosis, bronchitis, or pneumonia, and certain cardiovascular conditions. Hemoptysis is considered massive at . In such cases, there are always severe injuries. The primary danger comes from choking, rather than blood loss. Diagnosis * Past history, history of present illness, family history ** history of tuberculosis, bronchiectasis, chronic bronchitis, mitral stenosis, etc. ** history of cigarette smoking, occupational diseases by exposure to silica dust, etc. * Blood ** duration, frequency, amount ** Amounts of blood: large amounts of blood, or is there blood-streaked sputum ** Probable source of bleeding: Is the blood coughed up, or vomited? * Bloody sputum ** color, characters: blood-streaked, fresh blood, frothy pink, bloody gelatinous. * Accompanying symptoms ** ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Expectoration
Sputum is mucus that is coughed up from the lower airways (the trachea and bronchi). In medicine, sputum samples are usually used for a naked eye examination, microbiological investigation of respiratory infections and cytological investigations of respiratory systems. It is crucial that the specimen does not include any mucoid material from the nose or oral cavity. A naked eye exam of the sputum can be done at home by a patient in order to note the various colors (see below). Any hint of yellow or green color ( pus) suggests an airway infection (but does not indicate the type of organism causing it). Such color hints are best detected when the sputum is viewed on a very white background such as white paper, a white pot or a white sink surface. The more intense the yellow color, the more likely it is a caused by an infection (bronchitis, bronchopneumonia or pneumonia). Having green, yellow, or thickened phlegm (sputum) does not always indicate the presence of an infection. Also ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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