Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 75
Filtrar
2.
J Bioeth Inq ; 12(4): 587-99, 2015 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-26659866

RESUMO

Public health advocates, government agencies, and commercial organizations increasingly use nutritional science to guide food choice and diet as a way of promoting health, preventing disease, or marketing products. We argue that in many instances such references to nutritional science can be characterized as nutritional scientism. We examine three manifestations of nutritional scientism: (1) the simplification of complex science to increase the persuasiveness of dietary guidance, (2) superficial and honorific references to science in order to justify cultural or ideological views about food and health, and (3) the presumption that nutrition is the primary value of food. This paper examines these forms of nutritional scientism in the context of biopolitics to address bioethical concerns related to the misuse of scientific evidence to make claims regarding the effect of diet on health. We argue that nutritional scientism has ethical implications (i) for individual responsibility and freedom, (ii) concerning iatrogenic harm, and (iii) for well-being.


Assuntos
Disciplinas das Ciências Biológicas , Deficiências Nutricionais/dietoterapia , Deficiências Nutricionais/diagnóstico , Dieta , Alimentos , Promoção da Saúde , Política Nutricional , Formulação de Políticas , Saúde Pública , Responsabilidade Social , Ácido Ascórbico/história , Ácido Ascórbico/isolamento & purificação , Deficiência de Ácido Ascórbico/diagnóstico , Deficiência de Ácido Ascórbico/dietoterapia , Liberdade , Saúde , Comportamentos Relacionados com a Saúde , História do Século XIX , História do Século XX , História do Século XXI , Humanos , Doença Iatrogênica , Política Nutricional/história , Política Nutricional/tendências , Saúde Pública/ética , Saúde Pública/métodos , Saúde Pública/normas , Saúde Pública/tendências , Recomendações Nutricionais/história , Recomendações Nutricionais/legislação & jurisprudência , Estados Unidos
4.
Rev Med Chil ; 143(8): 1065-9, 2015 Aug.
Artigo em Espanhol | MEDLINE | ID: mdl-26436937

RESUMO

Albert Szent-Györgyi was a Hungarian biochemist and physiologist. He identified the structure and function of vitamin C, naming it as ascorbic acid. His research on cellular respiration and oxidation provided the basis for Krebs' citric acid cycle. He was awarded the Nobel Prize in 1937. With his collaborators, he discovered the biochemical basis of muscle contractility, isolating the basic proteins, giving them the name myosin and actin. Later on, he worked on the theory of carcinogenesis, linked to electron movements. He was one of the first researchers to describe the connection between free radicals and cancer. He lived a long, very complete life, defending always his opinion and freedom.


Assuntos
Ácido Ascórbico/história , Bioquímica/história , Prêmio Nobel , História do Século XIX , História do Século XX , Hungria
5.
Rev. méd. Chile ; 143(8): 1065-1069, ago. 2015. ilus, tab
Artigo em Espanhol | LILACS | ID: lil-762672

RESUMO

Albert Szent-Györgyi was a Hungarian biochemist and physiologist. He identified the structure and function of vitamin C, naming it as ascorbic acid. His research on cellular respiration and oxidation provided the basis for Krebs’ citric acid cycle. He was awarded the Nobel Prize in 1937. With his collaborators, he discovered the biochemical basis of muscle contractility, isolating the basic proteins, giving them the name myosin and actin. Later on, he worked on the theory of carcinogenesis, linked to electron movements. He was one of the first researchers to describe the connection between free radicals and cancer. He lived a long, very complete life, defending always his opinion and freedom.


Assuntos
História do Século XIX , História do Século XX , Ácido Ascórbico/história , Bioquímica/história , Prêmio Nobel , Hungria
6.
Ther Umsch ; 72(7): 463-8, 2015 Jul.
Artigo em Alemão | MEDLINE | ID: mdl-26111843

RESUMO

Artificial vitamin C has become a bulk product. To explain how ascorbic acid could enter everyday life, one less has to look at medical necessities than at the dynamic interplay of production, promotion, and health care policy. Hence, this contribution focuses on the complex interactions of health concepts, diagnostic instruments and the physician's gaze necessary to endow ascorbic acid with a medical indication. On the one hand, this reveals the differences between a "purely scientific" and a "medical-biological" point of view. On the other hand, as man last but not least is what he eats, this points to the fact that nutrition and parts of it always are soaked with health policy and moral.


Assuntos
Ácido Ascórbico/história , Suplementos Nutricionais/história , Indústria Farmacêutica/história , Política de Saúde/história , Promoção da Saúde/história , Europa (Continente) , História do Século XX , História do Século XXI , Humanos , Suíça
7.
Medizinhist J ; 49(4): 330-55, 2014.
Artigo em Alemão | MEDLINE | ID: mdl-26288924

RESUMO

In autumn of 1942, Max Clara (1899-1966) became chairman of the anatomical institute Munich. There, he intensified his research concerning the proof of vitamin C with the bodies of executed prisoners which were delivered by the Munich-Stadelheim prison. This research on human organs was pursued by applying ascorbic acid (Cebion) to prisoners before their execution. The paper investigates this intensified and radicalized anatomical research through human experiments, which Max Clara conducted in Munich and published from Istanbul during the postwar years, as well as its scientific references from the Nazi period.


Assuntos
Academias e Institutos/história , Anatomia/história , Ácido Ascórbico/história , Pena de Morte/história , Experimentação Humana/história , Prisioneiros/história , Alemanha , História do Século XX , Humanos
10.
J R Coll Physicians Edinb ; 43(2): 175-81, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23734365

RESUMO

Scurvy, caused by lack of vitamin C, was a major problem for polar explorers. It may have contributed to the general ill-health of the members of Scott's polar party in 1912 but their deaths are more likely to have been caused by a combination of frostbite, malnutrition and hypothermia. Some have argued that Oates's war wound in particular suffered dehiscence caused by a lack of vitamin C, but there is little evidence to support this. At the time, many doctors in Britain overlooked the results of the experiments by Axel Holst and Theodor Frølich which showed the effects of nutritional deficiencies and continued to accept the view, championed by Sir Almroth Wright, that polar scurvy was due to ptomaine poisoning from tainted pemmican. Because of this, any advice given to Scott during his preparations would probably not have helped him minimise the effect of scurvy on the members of his party.


Assuntos
Deficiência de Ácido Ascórbico/história , Ácido Ascórbico/história , Expedições/história , Escorbuto/história , Regiões Antárticas , Deficiência de Ácido Ascórbico/complicações , Pessoas Famosas , História do Século XX , Humanos , Escorbuto/etiologia , Reino Unido
11.
Clin Dermatol ; 31(3): 327-31, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23738385

RESUMO

Albert Szent-Györgyi, a Hungarian biochemist, discovered vitamin C and rutin (vitamin P). The role of these vitamins in the body and their application to dermatology is vast. For the discovery of vitamin C and the description of oxidation, Albert Szent-Györgyi received a Nobel Prize in medicine in 1937. He discovered the role of adenosine triphosphate, actin-myosin, and many phases of the Krebs cycle, and also initiated studies on the influence of free radicals in the formation of tumors. Between 1918 and 1946, he worked in many European research centers and between 1947 and 1986, in the United States. His achievements were made possible due to his perseverance, which allowed him to overcome many maelstroms that plagued his scientific career.


Assuntos
Ácido Ascórbico/história , Prêmio Nobel , Rutina/história , Vitaminas/história , Ciclo do Ácido Cítrico , Radicais Livres/história , História do Século XX , Humanos , Hungria
12.
Angew Chem Int Ed Engl ; 51(52): 12960-90, 2012 Dec 21.
Artigo em Inglês | MEDLINE | ID: mdl-23208776

RESUMO

The discovery of vitamins as essential factors in the diet was a scientific breakthrough that changed the world. Diseases such as scurvy, rickets, beriberi, and pellagra were recognized to be curable with an adequate diet. These diseases had been prevalent for thousands of years and had a dramatic impact on societies as well as on economic development. This Review highlights the key achievements in the development of industrial processes for the manufacture of eight of the 13 vitamins.


Assuntos
Disciplinas das Ciências Naturais/história , Vitaminas/história , Ácido Ascórbico/síntese química , Ácido Ascórbico/história , Ácido Ascórbico/metabolismo , Biotina/síntese química , Biotina/história , Biotina/metabolismo , História do Século XX , Humanos , Ácido Pantotênico/síntese química , Ácido Pantotênico/história , Ácido Pantotênico/metabolismo , Piridoxina/síntese química , Piridoxina/história , Piridoxina/metabolismo , Riboflavina/síntese química , Riboflavina/história , Riboflavina/metabolismo , Tiamina/síntese química , Tiamina/história , Tiamina/metabolismo , Vitamina A/síntese química , Vitamina A/história , Vitamina A/metabolismo , Vitamina E/síntese química , Vitamina E/história , Vitamina E/metabolismo , Vitaminas/síntese química , Vitaminas/metabolismo
13.
Ann Nutr Metab ; 61(3): 259-64, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-23183299

RESUMO

The term 'scurvy' for the disease resulting from prolonged vitamin C deficiency had origins in 'scorbutus' (Latin), 'scorbut' (French), and 'Skorbut' (German). Scurvy was a common problem in the world's navies and is estimated to have affected 2 million sailors. In 1747, James Lind conducted a trial of six different treatments for 12 sailors with scurvy: only oranges and lemons were effective in treating scurvy. Scurvy also occurred on land, as many cases occurred with the 'great potato famine' in Ireland in 1845. Many animals, unlike humans, can synthesize their own vitamin C. Axel Holst and Theodor Frölich fortuitously produced scurvy in the guinea pig, which like humans requires vitamin C in the diet. In 1928, Albert Szent-Györgyi isolated a substance from adrenal glands that he called 'hexuronic acid'. Four years later, Charles Glen King isolated vitamin C in his laboratory and concluded that it was the same as 'hexuronic acid'. Norman Haworth deduced the chemical structure of vitamin C in 1933.


Assuntos
Ácido Ascórbico/química , Ácido Ascórbico/história , Ácido Ascórbico/farmacologia , Animais , Deficiência de Ácido Ascórbico/complicações , Deficiência de Ácido Ascórbico/dietoterapia , Deficiência de Ácido Ascórbico/fisiopatologia , Citrus/química , Cobaias , História do Século XVIII , História do Século XIX , História do Século XX , Humanos , Escorbuto/dietoterapia , Escorbuto/etiologia , Escorbuto/fisiopatologia
14.
J Agric Food Chem ; 57(18): 8142-60, 2009 Sep 23.
Artigo em Inglês | MEDLINE | ID: mdl-19719126

RESUMO

Mom's conventional wisdom of eating fruits and vegetables to lead a healthy life has evolved with scientific, fact-finding research during the past four decades due to advances in science of "Foods for Health". Epidemiological and prospective studies have demonstrated the vital role of fruits, vegetables, and nuts in reducing the risk of cancer and cardiovascular diseases. In recent years, several meta-analyses strongly suggested that by adding one serving of fruits and vegetables to daily diet, the risk of cardiovascular diseases will be decreased up to 7%. The multidisciplinary and partnership efforts of agriculture and medical scientists across the globe stimulated interest in establishing certain interdisciplinary centers and institutes focusing on "Foods for Health". While the consumption of various healthy foods continues, several questions about toxicity, bioavailability, and food-drug interactions of bioactive compounds are yet to be fully understood on the basis of scientific evidence. Recent research on elucidation of the molecular mechanisms to understand the "proof of the concept" will provide the perfect answer when consumers are ready for a "consumer-to-farm" rather than the current "farm-to-consumer" approach. The multidisciplinary research and educational efforts will address the role of healthy foods to improve eye, brain, and heart health while reducing the risk of cancer. Through this connection, this review is an attempt to provide insight and historical perspectives on some of the bioactive compounds from the day of discovery to their current status. The bioactive compounds discussed in this review are flavonoids, carotenoids, curcumin, ascorbic acid, and citrus limonoids.


Assuntos
Dieta , Promoção da Saúde , Ácido Ascórbico/análise , Ácido Ascórbico/história , Ácido Ascórbico/uso terapêutico , Carotenoides/análise , Carotenoides/história , Carotenoides/uso terapêutico , Ensaios Clínicos como Assunto , Curcumina/análise , Curcumina/história , Curcumina/uso terapêutico , Dieta/história , Flavonoides/análise , Flavonoides/história , Flavonoides/uso terapêutico , Educação em Saúde , Promoção da Saúde/história , História do Século XVII , História do Século XIX , História do Século XX , História do Século XXI , Humanos , Pesquisa
15.
J Ethnobiol Ethnomed ; 5: 5, 2009 Feb 02.
Artigo em Inglês | MEDLINE | ID: mdl-19187550

RESUMO

Several conifers have been considered as candidates for "Annedda", which was the source for a miraculous cure for scurvy in Jacques Cartier's critically ill crew in 1536. Vitamin C was responsible for the cure of scurvy and was obtained as an Iroquois decoction from the bark and leaves from this "tree of life", now commonly referred to as arborvitae. Based on seasonal and diurnal amino acid analyses of candidate "trees of life", high levels of arginine, proline, and guanidino compounds were also probably present in decoctions prepared in the severe winter. The semi-essential arginine, proline and all the essential amino acids, would have provided additional nutritional benefits for the rapid recovery from scurvy by vitamin C when food supply was limited. The value of arginine, especially in the recovery of the critically ill sailors, is postulated as a source of nitric oxide, and the arginine-derived guanidino compounds as controlling factors for the activities of different nitric oxide synthases. This review provides further insights into the use of the candidate "trees of life" by indigenous peoples in eastern Canada. It raises hypotheses on the nutritional and synergistic roles of arginine, its metabolites, and other biofactors complementing the role of vitamin C especially in treating Cartier's critically ill sailors.


Assuntos
Arginina/metabolismo , Ácido Ascórbico/história , Óxido Nítrico/metabolismo , Fitoterapia/história , Preparações de Plantas/história , Escorbuto/tratamento farmacológico , Traqueófitas , Ácido Ascórbico/farmacologia , Ácido Ascórbico/uso terapêutico , Canadá , História do Século XVI , História do Século XVII , Humanos , Índios Norte-Americanos/história , Medicina Naval/história , Óxido Nítrico Sintase/metabolismo , Preparações de Plantas/farmacologia , Preparações de Plantas/uso terapêutico , Plantas Medicinais/metabolismo , Traqueófitas/metabolismo
18.
NTM ; 16(4): 445-70, 2008.
Artigo em Alemão | MEDLINE | ID: mdl-19579835

RESUMO

Today, thousands of tons of vitamin C (l-ascorbic acid) is synthesized every year by the pharmaceutical industry. Synthetically produced vitamin C is widely accepted as having the same physiological effects as vitamin C isolated from natural sources. This is an important difference compared to the 1930s when vitamin C was synthesized for the first time. The identity of synthetic vitamin C with natural vitamin C had to be established. First of all, the scientific community had to accept that artificial I-ascorbic acid and natural vitamin C were chemically identical and had the same physiological effects. Second, other communities like food manufacturers, military health officials, and the broader public also had to be persuaded that these substances were equal. This article demonstrates how Hoffmann-La Roche, a Swiss pharmaceutical company and world-leading producer of synthetic vitamins in the 20th century, tried to coax its adversaries into supporting artificial vitamin C. In doing so, synthetic vitamin C was naturalized in different ways. In the case of Switzerland during the Second World War era, the mentality of national defense and the quest for products supporting autarchy helped to convince perspective consumers. Thus in order to sell a new chemical substance, cultural meaning had to be attached to it.


Assuntos
Ácido Ascórbico/história , Aprovação de Drogas/história , Desenho de Fármacos , Indústria Farmacêutica/história , Tecnologia Farmacêutica/história , Vitaminas/história , Ácido Ascórbico/química , História do Século XX , Humanos , Suíça , Vitaminas/química , II Guerra Mundial
19.
Hormones (Athens) ; 6(4): 341-3, 2007.
Artigo em Inglês | MEDLINE | ID: mdl-18055426

RESUMO

Tadeus Reichstein (1897-1996) was the first scientist born in Poland to receive the Nobel Prize in Medicine or Physiology (1950) for the "discovery of hormones of the adrenal cortex, their structure and biological effects", as stated by the Nobel Prize Committee. His family being deeply devoted to Polish cultural and historical heritage, his first name was given to him after Tadeus Kosciuszko, a chief commander of the 18th century Polish uprising named the Kosciuszko Insurrection. As a child, he emigrated with his family to Switzerland, where he was much later to become involved in numerous research studies on steroids on an international scale. It was Tadeus Reichstein who isolated and synthesized desoxycorticosterone, which still remains the drug of first choice in the treatment of Addison's disease. Additionally, thanks to his strategy for the mass production of Vitamin C, the cost of this agent was drastically reduced thus enabling its widespread therapeutic use. In our divided world so often torn by tremendous conflicts, there is a great need to both remember and commemorate such distinguished people as Tadeus Reichstein who, despite the apparent "borders" between different nationalities and cultures, have demonstrated through their work the huge need for harmonious collaboration in the development of science.


Assuntos
Fisiologia/história , Corticosteroides/história , Ácido Ascórbico/história , História do Século XIX , História do Século XX , Humanos , Prêmio Nobel , Polônia , Suíça
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...