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Mostrando 25-36 de 37 artigos, teses e dissertações.
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25. Witch-hunt
Beginning two years ago, the US Dept of Health and Human Services began "special reviews" of all current research grants that involved harm reduction, sex and drugs, and continues its ban on funding of needle exchange. With Bush's second term, the campaign was extended to all US funded international programs that dealt with these issues and populations. And,
BioMed Central.
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26. Sensorimotor control in Parkinsonism 1
Performance on two sensorimotor tasks was compared between 28 patients with Parkinsonism and 28 age and sex matched controls. One task involved complex motor activity (the Bead and Tapper test) and the other simple motor activity with a verbal component (the Letter Cancellation test). Both tests had three levels of complexity. Under conditions of increasing
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27. Functional neuroanatomical double dissociation of mnemonic and executive control processes contributing to working memory performance
We used event-related functional MRI to investigate the neural bases of two categories of mental processes believed to contribute to performance of an alphabetization working memory task: memory storage and memory manipulation. Our delayed-response tasks required memory for the identity and position-in-the-display of items in two- or five-letter memory sets
The National Academy of Sciences.
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28. Verbal fluency in dementia of frontal lobe type and dementia of Alzheimer type.
This study compares semantic (category) and letter-initial verbal fluency performance in dementia of frontal lobe type, dementia of Alzheimer type, and control subjects matched for age, sex, and level of education. As well as demographic characteristics, patients were matched for severity of dementia as estimated by the mini mental scale (23.2 (SD 4.9)). All
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29. A comparison of methods for increasing compliance within a general practitioner based screening project for colorectal cancer and the effect on practitioner workload.
Screening for colorectal cancer by testing for faecal occult blood (FOBT) is effective for early diagnosis, but the success of a screening programme also depends on compliance. The aims of this study were to assess the effect of health education on compliance and to assess any addition to general practitioner workload that resulted. Altogether 3860 patients
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30. The use of multiple alphabets in kappa-gene immunoglobulin DNA sequence comparisons.
Comparisons within and between the human, mouse and rabbit immunoglobulin-kappa gene (J-C region) DNA sequences are carried out in terms of three two-letter nucleotide alphabets: (i) S-W alphabet (W = A or T; S = G or C); (ii) P-Q alphabet which distinguishes purines (P = A or G) from pyrimidines (Q = C or T); and (iii) a 'control' E-F alphabet (E = A or C;
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31. Two integrin-binding peptides abrogate T cell-mediated immune responses in vivo.
Two VLA proteins (or beta 1 integrins; originally called very late activation antigens) that bind to distinct determinants on fibronectin (FN) are increased on activated immune or memory T cells. VLA-4 binds to the peptide sequence Gly-Pro-Glu-Ile-Leu-Asp-Val-Pro-Ser-Thr (GPEILDVPST in single-letter code) on the alternatively spliced CS-1 form of FN, whereas
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32. Dissociable neural mechanisms underlying response-based and familiarity-based conflict in working memory
Cognitive control requires the resolution of interference among competing and potentially conflicting representations. Such conflict can emerge at different points between stimulus input and response generation, with the net effect being that of compromising performance. The goal of this article was to dissociate the neural mechanisms underlying different so
National Academy of Sciences.
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33. A comparison of the changes in suprathreshold apparent contrast in acute and simulated optic neuritis.
A thin PVC film was used as a diffusion filter together with glass lenses in order to induce a unilateral artificial contrast sensitivity depression in controls. These artificially depressed contrast sensitivity functions were made comparable to those assessed in patients during the recovery phase of their acute unilateral optic neuritis. A technique of subj
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34. Risk factors, falls, and fracture of the distal forearm in Manchester, UK.
OBJECTIVE: To determine the risk factors associated with fracture of the distal forearm, and to evaluate the influence of falls on these risks. DESIGN: This was a case-control study. SETTING: Manchester, UK. PARTICIPANTS: The cases were 62 white women aged 45-82 years who had sustained a fracture of the distal forearm and had attended local hospitals. Two co
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35. Vegetarian diet as a risk factor for tuberculosis in immigrant south London Asians.
BACKGROUND--In a previous retrospective study of tuberculosis in south London among Asian immigrants from the Indian subcontinent Hindu Asians were found to have a significantly increased risk for tuberculosis compared with Muslims. This finding has been further investigated by examining the role of socioeconomic and lifestyle variables, including diet, as r
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36. Human aldolase A deficiency associated with a hemolytic anemia: thermolabile aldolase due to a single base mutation.
Fructose-1,6-bisphosphate aldolase A (fructose-bisphosphate aldolase; EC 4.1.2.13) deficiency is an autosomal recessive disorder associated with hereditary hemolytic anemia. To clarify the molecular mechanism of the deficiency at the nucleotide level, we have cloned aldolase A cDNA from a patient's poly(A)+ RNA that was expressed in cultured lymphoblastoid c