|
| ||
|
|
||
Chronic Problem (chronic + problem)
Selected AbstractsDrought Stress and Preharvest Aflatoxin Contamination in Agricultural Commodity: Genetics, Genomics and ProteomicsJOURNAL OF INTEGRATIVE PLANT BIOLOGY, Issue 10 2008Baozhu Guo Abstract Throughout the world, aflatoxin contamination is considered one of the most serious food safety issues concerning health. Chronic problems with preharvest aflatoxin contamination occur in the southern US, and are particularly troublesome in corn, peanut, cottonseed, and tree nuts. Drought stress is a major factor to contribute to preharvest aflatoxin contamination. Recent studies have demonstrated higher concentration of defense or stress-related proteins in corn kernels of resistant genotypes compared with susceptible genotypes, suggesting that preharvest field condition (drought or not drought) influences gene expression differently in different genotypes resulting in different levels of "end products": PR(pathogenesis-related) proteins in the mature kernels. Because of the complexity of Aspergillus -plant interactions, better understanding of the mechanisms of genetic resistance will be needed using genomics and proteomics for crop improvement. Genetic improvement of crop resistance to drought stress is one component and will provide a good perspective on the efficacy of control strategy. Proteomic comparisons of corn kernel proteins between resistant or susceptible genotypes to Aspergillus flavus infection have identified stress-related proteins along with antifungal proteins as associated with kernel resistance. Gene expression studies in developing corn kernels are in agreement with the proteomic studies that defense-related genes could be upregulated or downregulated by abiotic stresses. [source] Diagnosis and management of nail psoriasisDERMATOLOGIC THERAPY, Issue 2 2002David de Berker Nail disease is a common chronic problem for psoriatics, with only limited scope for major improvement. Both the disease and its treatment can be categorized according to its features and treatment modalities or the significance of the therapy for the clinician and patient. Certain treatments are matched with certain features and some treatments are of potential value in all patients with nail psoriasis. [source] Effects of temperature, ammonium and glucose concentrations on yeast growth in a model wine systemINTERNATIONAL JOURNAL OF FOOD SCIENCE & TECHNOLOGY, Issue 10 2006Daniela D'Amato Summary In enology, alcoholic fermentation is a complex process involving several mechanisms. Slow and incomplete alcoholic fermentation is a chronic problem for the wine industry and factors leading to sluggish and stuck fermentations have been extensively studied and reviewed. The most studied cause of sluggish and stuck fermentation is the nitrogen content limitation. Nevertheless, other factors, such as temperature of fermentation and sugar concentration can affect the growth of yeasts. In this study we modelled the yeast growth-cycle in wine model system as a function of temperature, sugar and ammonium concentrations; the individual effects and the interaction of these factors were analysed by means of a quadratic response surface methodology. Cell concentrations and weight loss were monitored in the whole wine fermentation process. The results of central composite design show that lower is the availability of nitrogen, higher is the cell growth rate; moreover, initial nitrogen concentration also influences survival time of Saccharomyces cerevisiae. [source] Recovery From Skeletal Fluorosis (an Enigmatic, American Case),,JOURNAL OF BONE AND MINERAL RESEARCH, Issue 1 2007Etah S Kurland Abstract A 52-year-old man presented with severe neck immobility and radiographic osteosclerosis. Elevated fluoride levels in serum, urine, and iliac crest bone revealed skeletal fluorosis. Nearly a decade of detailed follow-up documented considerable correction of the disorder after removal of the putative source of fluoride (toothpaste). Introduction: Skeletal fluorosis, a crippling bone disorder, is rare in the United States, but affects millions worldwide. There are no data regarding its reversibility. Materials and Methods: A white man presented in 1996 with neck immobility and worsening joint pains of 7-year duration. Radiographs revealed axial osteosclerosis. Bone markers were distinctly elevated. DXA of lumbar spine (LS), femoral neck (FN), and distal one-third radius showed Z scores of +14.3, +6.6, and ,0.6, respectively. Transiliac crest biopsy revealed cancellous volume 4.5 times the reference mean, cortical width 3.2 times the reference mean, osteoid thickness 25 times the reference mean, and wide and diffuse tetracycline uptake documenting osteomalacia. Fluoride (F) was elevated in serum (0.34 and 0.29 mg/liter [reference range: <0.20]), urine (26 mg/liter [reference range: 0.2,1.1 mg/liter]), and iliac crest (1.8% [reference range: <0.1%]). Tap and bottled water were negative for F. Surreptitious ingestion of toothpaste was the most plausible F source. Results: Monitoring for a decade showed that within 3 months of removal of F toothpaste, urine F dropped from 26 to 16 mg/liter (reference range: 0.2,1.1 mg/liter), to 3.9 at 14 months, and was normal (1.2 mg/liter) after 9 years. Serum F normalized within 8 months. Markers corrected by 14 months. Serum creatinine increased gradually from 1.0 (1997) to 1.3 mg/dl (2006; reference range: 0.5,1.4 mg/dl). Radiographs, after 9 years, showed decreased sclerosis of trabeculae and some decrease of sacrospinous ligament ossification. DXA, after 9 years, revealed 23.6% and 15.1% reduction in LS and FN BMD with Z scores of +9.3 and +4.8, respectively. Iliac crest, after 8.5 years, had normal osteoid surface and thickness with distinct double labels. Bone F, after 8.5 years, was 1.15% (reference range, <0.1), which was a 36% reduction (still 10 times the reference value). All arthralgias resolved within 2 years, and he never fractured, but new-onset nephrolithiasis occurred within 9 months and became a chronic problem. Conclusions: With removal of F exposure, skeletal fluorosis is reversible, but likely impacts for decades. Patients should be monitored for impending nephrolithiasis. [source] Adherence to treatment in patients with psoriasisJOURNAL OF THE EUROPEAN ACADEMY OF DERMATOLOGY & VENEREOLOGY, Issue 4 2006HL Richards Abstract Non-adherence to medication is a chronic problem that impacts on healthcare professionals and patients alike. In psoriasis, a condition that presents patients with frequent and disabling physical, psychological and social effects, studies consistently suggest that up to 40% of patients do not use their medication as directed. Thus it is probable that poor adherence contaminates the clinical picture of response effectiveness in everyday practice. This educational paper reviews research that investigates adherence to medication in patients with psoriasis. It provides an overview of contributing factors and mediating variables. It is proposed that three specific facets appear to optimize patient adherence: an effective doctor,patient relationship; optimism with the treatment prescribed; and a limited ,nuisance' value of treatment in terms of side-effects and hassle of use. Various strategies to address adherence are suggested and it is argued that in order to enhance our understanding of adherence in patients with psoriasis, there needs to be an increasing focus on patients' beliefs about their condition and its management. [source] Dandruff and scaling scalp: management in general practicePRESCRIBER, Issue 11 2006Georgina Elston MRCP Scalp scale is a common and chronic problem causing considerable social embar rassment. Here the authors discuss the various causes of scalp scale and their recommended treatment in primary care. Copyright © 2006 Wiley Interface Ltd [source] Health Identities and Subjectivities:MEDICAL ANTHROPOLOGY QUARTERLY, Issue 1 2009The Ethnographic Challenge The formation of identity and subjectivity in relation to health is a fundamental issue in social science. This overview distinguishes two different approaches to the workings of power in shaping senses of self and other. Politics of identity scholars focus on social movements and organizations concerned with discrimination, recognition, and social justice. The biopower approach examines discourse and technology as they influence subjectivity and new forms of sociality. Recent work in medical anthropology, especially on chronic problems, illustrates the two approaches and also points to the significance of detailed comparative ethnography for problematizing them. By analyzing the political and economic bases of health, and by embedding health conditions in the other concerns of daily life, comparative ethnography ensures differentiation and nuance. It helps us to grasp the uneven effects of social conditions on the possibilities for the formation of health identities and subjectivities. [source] | ||||||||||