659 research outputs found
Darrera la pista del cà ncer : alteracions cromosòmiques i organització biològica
Els nous coneixements sobre genètica, juntament amb les sofisticades tècniques d'anĂ lisi, ajuden als cientĂfics a comprendre el procĂ©s cancerigen. Aquest estudi, dut a terme per investigadors de la UAB, Ă©s un exemple d'aquesta tasca. Els cientĂfics han pres com a cas d'estudi el carcinoma de bufeta i han analitzat les seves alteracions cromosòmiques i les han comparat amb la seva organitzaciĂł biològica.Los nuevos conocimientos sobre genĂ©tica junto con las sofisticadas tĂ©cnicas de análisis ayudan a los cientĂficos a comprender el proceso cancerĂgeno. El presente estudio, realizado por investigadores de la UAB, es un ejemplo. Tomando como caso de estudio al carcinoma de vejiga analizaron sus alteraciones cromosĂłmicas y las compararon con su organizaciĂłn biolĂłgica
Mesocotyl elongation in Digitaria sanguinalis during seedling development
The mesocotyl is an embryonic organ present in Poaceae that plays an important role in seedling emergence. The elongation
of this first internode contributes decisively to the coleoptile reaching the soil surface. This study examines the process of
mesocotyl elongation under controlled conditions in three caryopsis collection sites of Digitaria sanguinalis (L.)
Scop. originating from Spain (Barcelona and Girona) and Argentina that may have two patterns of germination: radicular or
coleoptilar. The frequencies of the two germination patterns varied significantly depending on the origin. Light inhibited the
elongation of the mesocotyl drastically, resulting in maximum lengths of 3.5mm, while in darkness the maximum length was
57mm. The time-course evolution displayed under dark conditions was quite similar for all sites of origin and both
germination patterns; the growth rate ranged from 0.23 to 0.30mmh21. Within localities, caryopses with a coleoptilar
pattern of germination showed a lower growth rate than those with a radicular one.Postprint (author's final draft
El lèxic del Libre de caça en el DCVB
The Libre de caça is a manuscript written in Catalan probably towards the end of the 15th century. This technical text compiles hunting, ornithological and medical information, as the falconers needed to have some special knowledge in order to care for the birds. From a linguistic point of view, this text provides a significant lexical corpus mainly related to the semantic field of falconry: types of birds, anatomy of the animals, botany, symptoms and remedies for some illnesses, etc. This article analyses a lexical sub-corpus from this Libre de caça which appears in the Catalan-Valencian-Balearic Dictionary, since for this work a comprehensive selection of this historic manual had been carried out, and we offer a proposal for a classification of the studied words into: hapax legomena, new denotations and newly documented entries.Aquest treball s’ha realitzat en el marc del projecte d’investigaciĂł EdiciĂłn crĂtica digital de textos hagiográficos de la literatura catalana de los siglos XV y XVI (Ref. FFI2009-11594) del Ministeri de Ciència i Tecnologia
The development of androgen-independent Prostate Cancer. An a “darwinian” molecular strategy. (State of art)
A part de cĂ ncer de pell, cĂ ncer de pròstata Ă©s la forma mĂ©s comuna de cĂ ncer en homes adults i la segona en moralitat cĂ ncer especĂfica en homes als Estats Units. El tractament inicial Ă©s generalment prostatectomia o radiaciĂł per eliminar o destruir les cèl ·lules canceroses que encara estan confinades dins de la cĂ psula de la pròstata. Els cĂ ncers de pròstata i de pròstata en l’etapa primerenca depenen dels andrògens per el creixement i la supervivència i la terĂ pia d’ablaciĂł d’andrògens fa que remetin. L’ablaciĂł d’andrògens el pilar de la terĂ pia per cĂ ncer de pròstata progressiu, provoca la regressiĂł dels tumors androgen-dependents tal i com es documenta pel treball de Huggins fa mĂ©s de 30 anys. Els cĂ ncers que no es curen per la cirurgia eventualment es converteixen en andrògens independents, el que fa la terĂ pia anti-andrògena ineficaç. Però com sorgeix la independència d’andrògens? Preveiem que la comprensiĂł de la vies metabòliques i moleculars proporcionen idees per entendre el mecanisme de acciĂł dels andrògens i els esquemes mitjançant els quals les cèl·lules canceroses subverteixen control del creixement normal i la fuita cap a la no resposta hormonal i preparen el camĂ a terĂ pies eficaces per a aquests, en l’actualitat, intractables. Actualment coneixem alguns camins pels quals la AIPC pot desenvolupar-se. La comprensiĂł de les vies que condueixen a AIPC Ă©s el primer pas cap al desenvolupament de terĂ pies eficaces per aquesta forma letal de cĂ ncer de pròstata.Apart from skin cancer, prostate cancer is the most common form of cancer in men and the second leading cause of cancer deaths in men in the United States. Initial treatment is usually prostatectomy or radiation to remove or destroy the cancerous cells that are still confined within the prostate capsule. However, many patients are not cured by this therapy and their cancer recurs, or they are diagnosed after the cancer has spread. Tumour growth is initially androgen dependent. Androgen ablation, the mainstay of therapy for progressive prostate cancer, causes regression of androgen-dependent tumours, as documented by the work of Huggins over 30 years ago. However, many men eventually fail this therapy and die of recurrent androgen-independent prostate cancer (AIPC). AIPC is a lethal form of prostate cancer that progresses and metastasizes. At present, there is no effective therapy for it. There are several pathways by which AIPC can develop. These pathways provide insights into the mechanism of androgen action and schemes by which cancer cells subvert normal growth control and escape attempts to treat the cancer. Understanding the pathways that lead to AIPC is the first step towards developing therapies for this lethal form of prostate cancer
EpidemiologĂa rural mallorquina a fines del siglo XVIII
Abstract not availabl
- …