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Lakshmi Krishnamoorthy Elizabeth Zachariah P. G. Ramaswamy N. Anantha 《Indian journal of clinical biochemistry : IJCB》1994,9(1):37-39
Circulating levels of gonadotropins (FSH,LH), prolactin (PRL), estradiol and progesterone were measured by radioimmunoassay
in the sera of 60 patients with histopathologically proven breast cancer. 30 patients belonged to the post and 30 to the premenopausal
group. 30 healthy women, 15 each in the pre and post menopausal groups served as controls for the study.
Prolactin was elevated in 33% and 26% of pre and post menopausal breast cancer patients respectively. Lower levels of estradiol
and progesterone were observed during the luteal phase of the menstrual cycle in premenopausal breast cancer patients. Among
postmenopausal patients with breast cancer, LH was elevated in 32%, FSH in 15% and estradiol in 30% of the patients studied. 相似文献
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Sanjeev Shruthi Molly Mary Thabah Bobby Zachariah Vir Singh Negi 《Indian journal of clinical biochemistry : IJCB》2021,36(2):185
To study oxidative stress in systemic lupus erythematosus (SLE) by estimating serum oxidised LDL (OxLDL), 8-hydroxy-2′-deoxyguanosine (8-OHdG), malondialdehyde (MDA), and total anti-oxidant status and to correlate with SLE disease activity and disease damage. Eighty SLE patients satisfying the Systemic Lupus International Collaborating Clinics/American College of Rheumatology (SLICC/ACR) 2012 criteria and 80 healthy controls were studied. Exclusion criteria were infections, renal insufficiency, other connective tissue diseases, drug-induced lupus, smoking, alcohol consumption. Disease activity was measured by SLE disease activity index-2 K (SLEDAI), disease damage was quantified by SLICC-Damage Index (SDI). Sera was tested for OxLDL, 8-OHdG, and total antioxidant status (TAS) by double-antibody sandwich ELISA; MDA measured by Colorimetric assay. Oxidative stress markers were compared between group1- controls, group 2-mildly active SLE (SLEDAI ≤ 5), group 3- moderate to highly active SLE (SLEDAI ≥ 6). SLE patients had significantly higher MDA, 8-OHdG and lower TAS when compared to healthy controls, while OxLDL was similar in the three groups. MDA, 8-OHdG were significantly higher, TAS lower in group 3 compared to group 2. MDA had positive correlation with SLEDAI, TAS negatively correlated with SLEDAI. SLE with neuropsychiatric manifestations, vasculitis, anti-sdDNA antibodies had higher MDA, MDA/TAS ratio. SLE patients with thrombocytopenia, and vasculitis had higher OxLDL. Only OxLDL was significantly higher in those patients who have SDI > 1. SLE patients have increased oxidative stress measured by increases in MDA, 8-OHdG, and lower total antioxidant status that was associated with disease activity and some disease manifestations. However only OxLDL was associated with damage. 相似文献
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Bobby Hoffman Matthew T. McCrudden Gregory Schraw Kendall Hartley 《Asia Pacific Education Review》2008,9(4):464-474
This study investigated the influence of informational complexity and working memory capacity on problem-solving efficiency.
We examined two predictions of thesituational efficiency hypothesis, which states that the efficiency of problem solving varies as a function of situational constraints. One prediction is that
informational complexity affects problem-solving efficiency. A second prediction is that working memory capacity affects problem-solving
efficiency. Students completed a working memory task and solved abstract and concrete syllogisms. Participants solved abstract
syllogisms more accurately than concrete syllogisms and spent more time solving abstract syllogisms. Thus participants demonstrated
greater problem-solving efficiency when solving concrete syllogisms. Results indicate that there is a trade-off between problem-solving
accuracy and problem-solving time when information differs with respect to informational complexity, a phenomenon we refer
to as theefficiency paradox. Working memory capacity did not affect accuracy or efficiency. The results support the conclusion that problem-solving efficiency
is situational and a function of the complexity of information. Educational implications and directions for future research
are suggested. 相似文献
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Bobby Virgil Cole Nicholas J. Sauers 《Journal of Research on Technology in Education》2018,50(3):200-213
One of the fastest growing, most discussed, and most expensive technology initiatives over the last decade has been one-to-one (1:1) computing initiatives. The purpose of this study was to examine key factors that influenced implementing and sustaining 1:1 computing initiatives from the perspective of school superintendents. Nine superintendents of established 1:1 programs were interviewed, and findings identified five themes for successful implementation and sustainability of 1:1 initiatives. (Keywords: 1:1 schools, school technology leadership, 1:1 implementation) 相似文献
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Growing criticism of existing educational leadership preparation programs seems to focus on a lack of contextual relevancy and instructional leadership. Universities and school districts need to develop more formal, collaborative, long-term relationships focused on the nature of principal preparation, moving beyond acculturation to district norms and irrelevancy to building future leaders' capacity for continuous educational improvement. Educational administration as an applied field demands that we answer key questions regarding the development of effective practitioners. 相似文献
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Bobby Hoffman 《Learning and individual differences》2010,20(3):276-283
This study investigated the role of self-efficacy beliefs, mathematics anxiety, and working memory capacity in problem-solving accuracy, response time, and efficiency (the ratio of problem-solving accuracy to response time). Pre-service teachers completed a mathematics anxiety inventory measuring cognitive and affective dispositions for mathematics, before completing an operation span task to measure working memory capacity, rating self-efficacy for mental multiplication, and then solved computer-based multiplication problems at two complexity levels. A simultaneous regression design was used to assess the unique variance associated with each variable. There were two new findings; the differential role of self-efficacy on response time and efficiency, and the potential compensatory relationship between self-efficacy and mathematics anxiety related to efficiency outcomes. Educational implications and suggestions for future research were proposed. 相似文献