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General Science
General Science
A-Z of AVIONICS
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A-Z of AVIONICS
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kalimna
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Re: A-Z of AVIONICS
«
Reply #280 on:
14/12/2006 19:19:56 »
Jeroboam - as in large bottle of wine, particularly champagne. And with the fermenting of primarily carbohydrate into alcohol, along with several flavour, colouring and preserving reactions - wine is very scientific indeed
I apologise. It has been a long day.
Adam
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Reply #281 on:
14/12/2006 23:45:53 »
K
washiorkor
http://content.answers.com/main/content/wp/en/thumb/2/27/175px-Kwashiorkor_child.jpg
Kwashiorkor
Classifications and external resources
Kwashiorkor sufferers show signs of
thinning hair, edema, inadequate growth, and weight loss
. The stomatitis on the pictured infant indicate an accompanying
Vitamin B deficiency
.
Many of the children in this photograph from a Nigerian orphanage in the late 1960's show symptoms of malnutrition, with four in particular illustrating the gray-blond hair symptomatic of kwashiorkor.
Kwashiorkor is a type of childhood malnutrition with controversial causes, but commonly believed to be caused by
insufficient protein intake
. British pediatrician Cicely D. Williams introduced the name into international scientific circles in her 1935 Lancet article[1]. The name is derived from one of the Kwa languages of coastal Ghana and means "the one who is displaced" reflecting the development of the condition in the older child who has been weaned from the breast once a new sibling is born.
When a child is nursing, it receives certain amino acids vital to growth from its mother's milk. When the child is weaned, if the diet that replaces the milk is high in starches and carbohydrates, and deficient in protein (as is common in parts of the world where the bulk of the diet consists of starchy vegetables, or where famine has struck), the child may develop kwashiorkor.
Symptoms of kwashiorkor include a
swollen abdomen, reddish discoloration of the hair and depigmented skin
. The swollen abdomen is generally attributed to two causes: ascites due to altered oncotic pressure as a result of
hypoalbuminemia
(low albumin in the blood) and grossly enlarged liver due to fatty liver. This fatty change occurs because of the lack of apolipoproteins which transport lipids from the liver to tissues throughout the body. Additionally, the child has a miserable appearance with a "bull-dog" face. Generally, the disease can be treated by adding food energy and protein to the diet; however, mortality can be as high as 60% and it can have a long-term impact on a child's physical growth and, in severe cases, affect mental development.
From
Wikipedia
, the free encyclopedia: http://en.wikipedia.org/wiki/Kwashiorkor
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Reply #282 on:
15/12/2006 00:02:51 »
Light an effect
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Reply #283 on:
15/12/2006 00:03:52 »
The longest Scientific name for an enzyme which has been cited in multiple scientific journals:
methionylglutaminylarginyltyrosylglutamylserylleucylphenylal
anylalanylglutaminylleucyllysylglutamylarginyllysylglutamylg
lycylalanylphenylalanylvalylprolylphenylalanylvalylthreonyll
eucylglycylaspartylprolylglycylisoleucylglutamylglutaminylse
rylleucyllysylisoleucylaspartylthreonylleucylisoleucylglutam
ylalanylglycylalanylaspartylalanylleucylglutamylleucylglycyl
isoleucylprolylphenylalanylserylaspartylprolylleucylalanylas
partylglycylprolylthreonylisoleucylglutaminylasparaginylalan
ylthreonylleucylarginylalanylphenylalanylalanylalanylglycylv
alylthreonylprolylalanylglutaminylcysteinylphenylalanylgluta
mylmethionylleucylalanylleucylisoleucylarginylglutaminyllysy
lhistidylprolylthreonylisoleucylprolylisoleucylglycylleucyll
eucylmethionyltyrosylalanylasparaginylleucylvalylphenylalany
lasparaginyllysylglycylisoleucylaspartylglutamylphenylalanyl
tyrosylalanylglutaminylcysteinylglutamyllysylvalylglycylvaly
laspartylserylvalylleucylvalylalanylaspartylvalylprolylvalyl
glutaminylglutamylserylalanylprolylphenylalanylarginylglutam
inylalanylalanylleucylarginylhistidylasparaginylvalylalanylp
rolylisoleucylphenylalanylisoleucylcysteinylprolylprolylaspa
rtylalanylaspartylaspartylaspartylleucylleucylarginylglutami
nylisoleucylalanylseryltyrosylglycylarginylglycyltyrosylthre
onyltyrosylleucylleucylserylarginylalanylglycylvalylthreonyl
glycylalanylglutamylasparaginylarginylalanylalanylleucylprol
ylleucylasparaginylhistidylleucylvalylalanyllysylleucyllysyl
glutamyltyrosylasparaginylalanylalanylprolylprolylleucylglut
aminylglycylphenylalanylglycylisoleucylserylalanylprolylaspa
rtylglutaminylvalyllysylalanylalanylisoleucylaspartylalanylg
lycylalanylalanylglycylalanylisoleucylserylglycylserylalanyl
isoleucylvalyllysylisoleucylisoleucylglutamylglutaminylhisti
dylasparaginylisoleucylglutamylprolylglutamyllysylmethionyll
eucylalanylalanylleucyllysylvalylphenylalanylvalylglutaminyl
prolylmethionyllysylalanylalanylthreonylarginylserine
This is the expanded name for a tryptophan compound made up of 267 amino acids described with the following chemical composition:
C1289, H2051, N343, O375,S8
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kalimna
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Oh globbits!
Re: A-Z of AVIONICS
«
Reply #284 on:
15/12/2006 00:33:29 »
Neodymium - a rare earth with a nice-sounding name......
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Re: A-Z of AVIONICS
«
Reply #285 on:
15/12/2006 11:56:23 »
O
sler William (12 July 1849 – 29 December 1919)
http://www.historicalmedicalart.com/images/swo_mat_lg.jpg
http://www.nndb.com/people/564/000024492/osler129.jpg
Biography
William Osler
was born in a remote part of Ontario known as Bond Head. He spent a year at Trinity College in Ontario before deciding on a career in medicine. He attended the
Toronto
Medical College for two years and in 1872 received his M.D. degree from McGill University in Montreal. Like many of his fellow physicians trained in Canada, Osler went abroad for postgraduate study. He studied in
London, Berlin, and Vienna
before returning to Canada in 1874 and joining the medical faculty at
McGill
. A year later he was promoted to professor. Osler was elected a fellow of the British Royal College of Physicians in 1883, one of only two Canadian fellows at that time. In 1884 he left Montreal for Philadelphia to become professor of clinical medicine at the University of Pennsylvania.
John S. Billings recruited William Osler in 1888 to be physician-in-chief of the soon-to-open Johns Hopkins Hospital and professor of medicine at the planned school of medicine. Osler was the second appointed member of the original four medical faculty, following William H. Welch and preceding Howard A. Kelly and William S. Halsted. He revolutionized the medical curriculum of the United States and Canada,
synthesizing the best of the English and German systems
. Osler adapted the English system to egalitarian American principles by teaching all medical students at the bedside. He believed that students learned best by doing and clinical instruction should therefore begin with the patient and end with the patient. Books and lectures were supportive tools to this end. The same principles applied to the laboratory, and all students were expected to do some work in the bacteriology laboratory. Osler introduced the German postgraduate training system, instituting one year of general internship followed by several years of residency with increasing clinical responsibilities.
William Osler’s book, The Principles and Practice of Medicine, first published in 1892, supported his imaginative new curriculum. It was based upon the advances in medical science of the previous fifty years and remained the standard text on clinical medicine for the next forty years.
Osler, a superb diagnostician and clinician, was greatly esteemed by his peers in this country and abroad. In 1905 he accepted the Regius Professorship of Medicine at Oxford University, at the time the most prestigious medical appointment in the English-speaking world. He left Maryland with warm feelings for Hopkins knowing that his sixteen years spent had laid a solid foundation for the future of Hopkins medical education.
From: 1993 McCall, Nancy, ed. The Portrait Collect
http://www.medicalarchives.jhmi.edu/osler/biography.htm
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Re: A-Z of AVIONICS
«
Reply #286 on:
15/12/2006 16:43:08 »
Michael, you missed an ' a ' back there !
P
hotosynthesis
(photo=light, synthesis=putting together), generally, is the synthesis of sugar from light, carbon dioxide and water, with oxygen as a waste product. It is arguably the most important biochemical pathway known; nearly all life depends on it. It is an extremely complex process, comprised of many coordinated biochemical reactions. It occurs in higher plants, algae, some bacteria, and some protists, organisms collectively referred to as photoautotrophs.
[ Invalid Attachment ]
The leaf is the primary site of photosynthesis in plants.
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«
Reply #287 on:
15/12/2006 18:10:24 »
Q
uestion marks
There are plenty of those in Science!
No, no good... [
]
Q
uinolone, alkaloids
http://www.genome.jp/Fig/compound/C05079.gif
http://micro.magnet.fsu.edu/primer/techniques/polarized/gallery/images/nalidixicacid20xsmall.jpg
http://www.axxora.com/files/formula/LKT-L5749.gif
...The quinolones are a family of broad-spectrum antibiotics. The parent of the group is
nalidixic acid
. The majority of quinolones in clinical use belong to the subset of fluoroquinolones, which have a fluoro group attached the central ring system.
more from wikipedia:
http://en.wikipedia.org/wiki/Quinolone
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Oh globbits!
Re: A-Z of AVIONICS
«
Reply #288 on:
15/12/2006 18:13:52 »
Roentgen..... as in all things x-ray....
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Re: A-Z of AVIONICS
«
Reply #289 on:
15/12/2006 19:17:01 »
Sporangia
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Reply #290 on:
15/12/2006 21:32:44 »
T
etracycline
http://upload.wikimedia.org/wikipedia/en/thumb/0/0c/Tetracycline5.png/220px-Tetracycline5.png
History
Tetracycline was first discovered by Lloyd Conover in the research departments of Pfizer. The patent for Tetracycline was first issued in 1950 (patent number 2,624,354). Tetracycline sparked the development of many chemically altered antibiotics and in doing so has proved to be one of the most important discoveries made in the field of antibiotics
from wikipedia: http://en.wikipedia.org/wiki/Tetracycline
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Re: A-Z of AVIONICS
«
Reply #291 on:
15/12/2006 21:52:31 »
U
vula
of urinary bladder5
The mucous membrane immediately behind the internal urethral orifice presents a slight elevation, the uvula of urinary bladder, caused by the middle lobe of the prostate.
[ Invalid Attachment ]
Vertical section of bladder, penis,
and urethra. (Uvula not labeled,
but would be present in bladder,
at region labeled "neck".)
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Re: A-Z of AVIONICS
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Reply #292 on:
15/12/2006 23:00:47 »
V
ancomycin
http://stripe.colorado.edu/~kocht/vancomycin.GIF
http://www.science-education.org/images/van_med.gif
Vancomycin is a powerful, chlorine-containing antibiotic drug that often works when all other antibiotics fail. It has been called the "antibiotic of last-resort," having saved the lives of patients suffering from serious, stubborn bacterial illnesses. Although few of us will ever have a need for it, it is a very good thing that vancomycin is available.
Scientists know that nature is a rich chemical laboratory from which many useful medicines may be derived. Vancomycin, like many other healing drugs, is a product of nature. It is produced by the soil bacteria, Streptomyces orientalis, originally found in India and Indonesia over forty years ago. The chemical formula for vancomycin, C66H75Cl2N9O24, shows that it is a large molecule.
more if you click here:
http://www.science-education.org/classroom_activities/chlorine_compound/vancomycin.html
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Re: A-Z of AVIONICS
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Reply #293 on:
16/12/2006 04:45:10 »
W
ankel
, Felix
Prof.hc.Dr.Ing.e.h. Felix Heinrich Wankel (August 13, 1902–October 9, 1988) was the German inventor of the Wankel engine.
Wankel was born in Lahr, Germany, in the upper Rhine Valley. Since his mother was widowed in World War I, Wankel received no university education or even an apprenticeship. However he was able to teach himself technical subjects and conceived the idea of the Wankel engine in 1924. In the 1930s, he had a disagreement with Adolf Hitler, and was imprisoned by the Nazis for some months. During World War II, he developed seals and rotary valves for German air force aircraft and navy torpedoes. After the war, he was imprisoned by the Allies for some months, his laboratory was closed, his work confiscated, and he was prohibited from doing more work. In 1951, he began development of the engine at NSU (NSU Motorenwerke AG), leading to the first running prototype in 1957. His Wankel engine design was first licensed by Curtiss Wright in New Jersey. Mazda in Japan solved the chatter marks problem. The engine has been successfully used by Mazda in several generations of their RX-series of coupés.
In later years, Wankel was granted an honorary Doctorate of Engineering (Dr.-Ing.). He was known for his championing of animal rights and opposition to the use of animals in testing. He never had a driver's license.
[ Invalid Attachment ]
Wankel Engine in Deutsches
Museum Munich, Germany
How it works
The Wankel cycle. The "A" marks one of the three apexes of the rotor. The "B" marks the eccentric shaft, turning three times for every revolution of the rotor.
In the Wankel engine, the four strokes of a typical Otto cycle engine are arranged sequentially around an oval, unlike the reciprocating motion of a piston engine. In the basic single rotor Wankel engine, a single oval (technically an epitrochoid) housing surrounds a three-sided rotor (similar to a Reuleaux triangle, but with the middle of each side a bit more flattened) which turns and moves within the housing. The sides of the rotor seal against the sides of the housing, and the corners of the rotor seal against the inner periphery of the housing, dividing it into three combustion chambers.
As the rotor turns, its motion and the shape of the housing cause each side of the rotor to get closer and farther from the wall of the housing, compressing and expanding the combustion chamber similarly to the "strokes" in a reciprocating engine. However, whereas a normal four stroke cycle engine produces one combustion stroke per cylinder for every two revolutions (that is, one half power stroke per revolution per cylinder) each combustion chamber of each rotor in the Wankel generates one combustion 'stroke' per revolution (that is, three power strokes per rotor revolution). Since the Wankel output shaft is geared to spin at three times the rotor speed, this becomes one combustion 'stroke' per output shaft revolution per rotor, twice as many as the four-stroke piston engine, and similar to the output of a two stroke cycle engine. Thus, power output of a Wankel engine is generally higher than that of a four-stroke piston engine of similar engine displacement in a similar state of tune, and higher than that of a four-stroke piston engine of similar physical dimensions and weight. Wankel engines also generally have a much higher redline than a similarly sized reciprocating engine since the strokes are completed with a rotary motion as opposed to a reciprocating engine which must use connecting rods and a crankshaft to convert reciprocating motion into rotary motion.
National agencies which tax automobiles according to displacement and regulatory bodies in automobile racing variously consider the Wankel engine to be equivalent to a four-stroke engine of 1.5 to 2 times the displacement; some racing regulatory agencies view it as offering so pronounced an advantage that they ban it altogether.[citation needed]
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Re: A-Z of AVIONICS
«
Reply #294 on:
16/12/2006 07:18:11 »
Xanthine- A white, crystalline nitrogenous compound,C5,H4, N4, 02, that decomposes into Ethel alcohol and carbon disulfide at 24*C.
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Reply #295 on:
16/12/2006 09:04:33 »
Y
ohimbine
Yohimbine
From
Wikipedia
, the free encyclopedia:
Yohimbine, also known under the outdated names quebrachin,
aphrodin
, corynine, yohimvetol, and hydroergotocin, is the principal alkaloid of the bark of the West-African tree Pausinystalia yohimbe Pierre (formerly Corynanthe yohimbe), family Rubiaceae (Madder family). There are 31 other yohimbane alkaloids found in Yohimbe.
http://en.wikipedia.org/wiki/Yohimbine
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Re: A-Z of AVIONICS
«
Reply #296 on:
16/12/2006 17:33:33 »
Z
onal
flow
Zonal flow
is a meteorological term meaning that the general flow pattern is west to east along the earth's latitude lines (the opposite of meridional flow). Extratropical cyclones in this environment tend to be weaker, moving faster and producing relatively little impact on local weather.
[ Invalid Attachment ]
A zonal flow regime. Note the dominant
west-to-east flow as shown in the 500
hPa height pattern.
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Reply #297 on:
16/12/2006 17:57:09 »
Archea-Primitive single-celled prokaryotic organisms resembling bacteria.
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Reply #298 on:
16/12/2006 23:22:52 »
B
essis Marcel (1917-1994)
Inserm actualités 1994
Marcel Bessis vient de nous quitter. De la campagne d'Italie à la première rémission des leucémies aiguës, tel pourrait être le titre du chapitre initial de l'oeuvre de Marcel Bessis. C'est pendant la campagne d'Italie qu'il avait proposé de traiter les blessés victimes de graves écrasements musculaires par le grand échange du sang,
l'exsanguino-transfusion
. C'est à l'hôpital Saint-Antoine que, un des tout premiers, il traite par l'exsanguino-transfusion les nouveau-nés victimes de la maladie hémolytique par conflit Rhésus. D'où de pénétrantes études sur cette maladie du nouveau-né qu'il reproduit chez le raton, qu'il retrouve chez le muleton du Poitou, victime des anticorps anti-baudet sécrétés par la mère jument. C'est enfin
,
en novembre 1947, à l'hôpital Herold, pour la première fois dans l'histoire des leucémies, la rémission complète d'une leucémie aiguë obtenue par l'exsanguino-transfusion, début d'un long combat
.
Cependant, Marcel Bessis, se consacrant entièrement au laboratoire, devenait le pionnier des nouvelles méthodes microscopiques. Il applique la microscopie électronique à l'étude des structures des cellules sanguines normales et leucémiques. Il reconnaît, décrit des formes, des structures nouvelles. Surtout, il met au point la microcinématrographie accélérée en contraste de phase. Il passe de l'anatomie à la physiologie. Il crée littéralement l'écologie, l'éthologie des cellules sanguines, reconnaissant les informations qui couvent à l'intérieur de la cellule, d'organelle en organelle, de mitochondries en centriole. C'est ainsi qu'on lui doit la première description du nécrotaxis, de cette mort cellulaire qui inspire actuellement de nombreux travaux.
Marcel Bessis, comme les grands hommes de sciences, a su constamment allier la rigueur technique à une réflexion générale philosophique dont témoignent des essais sur l'histoire de la recherche scientifique, la créativité dans l'art et la science, la définition du soi et du non-soi.
Cette oeuvre, très étroitement liée à celle des chercheurs de l'Inserm, a été accomplie à l'Institut de pathologie cellulaire de l'hôpital de Bicêtre, puis au Centre d'écologie des cellules du sang à la Salpêtrière.
Membre de nombreuses académies et sociétés savantes étrangères, Marcel Bessis avait été élu en 1979 membre de l'Académie des Sciences.
Professeur
Jean Bernard
http://infodoc.inserm.fr/histoire/Histoire.nsf/(WWWReponses)/5AFB06BDC8B13BE480256DCC004EBFBF?OpenDocument&Infos
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Reply #299 on:
17/12/2006 19:48:32 »
C
lavicle
In human anatomy, the clavicle or collar bone is classified as a long bone that makes up part of the shoulder girdle (pectoral girdle). It receives its name from the Latin clavicula ("little key") because the bone rotates along its axis like a key when the shoulder is abducted. (This movement is palpable with the opposite hand). In some people, particularly females who may have less fat in this region, the location of the bone is clearly visible as it creates a bulge in the skin.
Clavicles are found in many tetrapods but tend to be rudimentary or absent in those using their forelimbs primarily for support or running and present where the forelimbs are used for grasping or brachiation.
[ Invalid Attachment ]
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