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  • 11
    Electronic Resource
    Electronic Resource
    [s.l.] : Macmillan Magazines Ltd.
    Nature 395 (1998), S. 131-132 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] ... Mangrove forests dominate the intertidal zone of the world's tropical coastlines, yielding to saltmarshes in the temperate and arctic zones. Unfortunately, more than 80 per cent of the world's population also lives in the coastal zone. Saltmarshes and mangroves face tremendous human pressure ...
    Type of Medium: Electronic Resource
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  • 12
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 13
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science, Ltd
    Molecular microbiology 41 (2001), S. 0 
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: KP4 is a virally encoded fungal toxin secreted by the P4 killer strain of Ustilago maydis. From our previous structural studies, it seemed unlikely that KP4 acts by forming channels in the target cell membrane. Instead, KP4 was proposed to act by blocking fungal calcium channels, as KP4 was shown to inhibit voltage-gated calcium channels in rat neuronal cells, and its effects on fungal cells were abrogated by exogenously added calcium. Here, we extend these studies and demonstrate that KP4 acts in a reversible manner on the cell membrane and does not kill the cells, but rather inhibits cell division. This action is mimicked by EGTA and is abrogated specifically by low concentrations of calcium or non-specifically by high ionic strength buffers. We also demonstrate that KP4 affects 45Ca uptake in U. maydis. Finally, we show that cAMP and a cAMP analogue, N 6,2′-O-dibutyryladenosine 3′:5′-cyclic monophosphate, both abrogate KP4 effects. These results suggest that KP4 may inhibit cell growth and division by blocking calcium-regulated signal transduction pathways.
    Type of Medium: Electronic Resource
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  • 14
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    Unknown
    New York, N.Y. : Periodicals Archive Online (PAO)
    Journal of community health. 2:4 (1977:Summer) 299 
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  • 15
    Electronic Resource
    Electronic Resource
    Springer
    International archives of occupational and environmental health 66 (1994), S. 49-54 
    ISSN: 1432-1246
    Keywords: Asbestos ; Cancer mortality ; Polychlorinated biphenyls ; Solvents ; Transformer assembly ; Synthetic resins
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary To address earlier reports of excess cancer mortality associated with employment at a large transformer manufacturing plant, each plant operation was rated for seven exposures: Pyranol (a mixture of poly chlorinated biphenyls and trichlorobenzene), trichloroethylene, benzene, mixed solvents, asbestos, synthetic resins, and machining fluids. Site-specific cancer deaths among active or retired employees were cases; controls were selected from deaths (primarily cardiovascular deaths) presumed to be unassociated with any of the study exposures. Using job records, we then computed person-years of exposure for each subject. All subjects were white males. The only unequivocal association was that of resin systems with lung cancer (odds ratio = 2.2 at 16.6 years of exposure, P = 0.001, in a multiple logistic regression including asbestos, age, year of death, and year of hire). Certain other odds ratios appeared larger, but no other association was so robust and remained as distinct after considering the multiplicity of comparisons. Study power was very limited for most associations, and several biases may have affected our results. Nevertheless, further investigation of synthetic resin systems of the type used in the study plant appears warranted.
    Type of Medium: Electronic Resource
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  • 16
    Electronic Resource
    Electronic Resource
    Springer
    Breast cancer research and treatment 23 (1992), S. 17-27 
    ISSN: 1573-7217
    Keywords: breast neoplasm ; cost-effectiveness ; decision trees ; economics ; medical effectiveness ; patient preferences
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The use of adjuvant chemotherapy in women with node-negative breast cancer has been controversial and actively debated since the 1988 National Cancer Institute Clinical Alert. We developed a decision analysis model that used the results of available randomized controlled trials to assess the potential clinical and financial effects of using adjuvant chemotherapy for groups of 45-year-old and 60-year-old women. Using the baseline assumptions, we found that chemotherapy increases quality adjusted life expectancy and survival by a substantial amount at a cost comparable to most accepted medical interventions. The model highlights the uncertainties in duration of benefit from therapy, the need for refinements in risk stratification, the importance of patient preferences about toxicity and benefit, and the need for accurate cost-accounting for oncologic therapies. Decision analysis complements other methods for information gathering, analysis, and synthesis used in clinical research. With the increasing focus on the effectiveness of medical interventions, decision analysis will be an important tool for oncologists to understand.
    Type of Medium: Electronic Resource
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  • 17
    ISSN: 1573-7217
    Keywords: breast neoplasms ; elderly ; practice patterns ; databases ; surgical therapy ; staging ; adjuvant therapies
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Background Few studies of practice variation in the management of early breast cancer for elderly women have examined the process of care in depth. This study evaluated the effects of age and other factors on surgical staging techniques and treatment. Methods Virginia cancer registry data were linked with Medicare claims and 1990 census data. The sample included all newly diagnosed patients with pathologic confirmed local and regional breast cancer in 1985–1989 (n=3,361). Analyses included descriptive univariate statistics and multiple logistic regression analysis for staging and treatment alternatives. Process of care variables included tumor size determination, axillary lymph node dissection, use of adjuvant therapy, and radiation if breast conserving surgery (BCS) was performed. Results About 75 percent of women had tumor size and axillary node dissection. Increasing comorbidity was associated with a lower likelihood of axillary node dissection. Nine percent of local compared to 44 percent of regional disease patients received adjuvant therapy. Hormonal therapy increased from 13 percent of women in 1985–1988 to 24 percent in 1989. Hormonal therapy did not vary with patient age. One-third of the patients with positive lymph nodes compared to 8 percent of node negative women received hormonal therapy. Blacks were more likely to present with advanced disease. A logistic regression model evaluated the multiple effects of patients and clinical characteristics: older women were more likely to present with larger tumors, were less likely to have axillary node dissections, and were less likely to receive chemotherapy or radiation. Conclusions Younger age was most consistently associated with staging and the use of chemotherapy in this cohort of elderly breast cancer patients. Based on the reported initial treatment plan, hormonal therapy was infrequently used and information from axillary lymph node assessment was used to stratify treatment. Although the low use of adjuvant hormonal therapy in elderly women may compromise survival, neither comorbid nor socioeconomic factors as measured in this study explained this practice pattern.
    Type of Medium: Electronic Resource
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  • 18
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The capsid of HRV-14 is composed of 60 copies of four viral proteins, VP1-VP4. Each of the first three proteins has a relative molecular mass of ~30,000 (Mr ~ 30K) and a similar p-barrel structure. The smaller VP4 (Mr ~ 7K) lies at the capsid-RNA interface with an extended structure3. The ...
    Type of Medium: Electronic Resource
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  • 19
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of environmental contamination and toxicology 15 (1976), S. 651-659 
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
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  • 20
    ISSN: 1573-2568
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A modification of Wada's finger-tip counting technic for determination of palmar sweat-gland activity is described. The active sweat-gland count of the finger tip was found to be highly reproducible under the conditions of gastric analysis. The modified sweat-gland test and Mushin's salivary-flow technic were used to study the effects of varying doses of two anticholinergic drugs during gastric analyses on 12 patients. Significant correlations were found between the initial value and the maximum drug response for both sweat- and salivary-gland tests. There also was a significant correlation between sweat- and salivary-gland activities in both the basal period and during maximum drug inhibition. The results of this study indicate that the sweat-gland test is an excellent procedure for evaluation of “side effects” of anticholinergic drugs during studies of gastric secretion. This test also is a sensitive method for determining onset of action, peak effect, and duration of action of anticholinergic drugs.
    Type of Medium: Electronic Resource
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