biological positive feedback loops
Báo cáo khoa học: Novel suppression mechanism operating in early phase of adipogenesis by positive feedback loop for enhancement of cyclooxygenase-2 expression through prostaglandin F2a receptor mediated activation of MEK⁄ ERK-CREB cascade doc
... PGF2awas shownto regulate COX-2 expression in an autocrine ⁄ para-crine manner to establish a positive feedback system inIshikawa endometrial adenocarcinoma cells [36,40].Here, we demonstrated ... compilation ê 2011 FEBS Novel suppression mechanism operating in early phase ofadipogenesis by positive feedback loop for enhancementof cyclooxygenase-2 expression through prostaglandin F2areceptor ... CREB to the COX-2 pro-moter via FP receptor activated MEK ⁄ ERK cascade. Thus, PGF2aforms a positive feedback loop that coordinately suppresses the early phase of adipo-genesis through the increased...
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Báo cáo khoa học: "The role of positive feedback in Intelligent Tutoring Systems" ppt
... negative feedback only.What might be the educational value of positive feedback in ITSs? First of all, positive feedback may be an effective motivational technique (Lepperet al., 1997). Positive feedback ... significant effect of feedback forlinked lists and stacks, but no significant effect ontrees. Interestingly, the effect of positive feedback is positive, but the effect of negative feedback is nega-tive, ... (intercoderagreement: kappa = 0.67). Examples of feedback episodes are reported in Figure 1.The number of positive feedback episodes and thenumber of negative feedback episodes have been in-troduced...
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Báo cáo khoa học: A systems biological approach suggests that transcriptional feedback regulation by dual-specificity phosphatase 6 shapes extracellular signal-related kinase activity in RAS-transformed fibroblasts pptx
... influence ofpost-translational feedback loops on the dynamicbehavior of this signaling cascade has been unveiled,and it was found that there are positive and negativefeedbacks, depending on the ... the importance of post-translationalfeedbacks, but have generally neglected transcriptional feedback loops. A recent analysis has shown that tran-scriptional feedback regulation by short-lived ... unex-pected biological responses. One important aspect isthat systems controlled by negative feedbacks may bevery robust with respect to manipulations of differentcomponents within the feedback...
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![thomas - biological feedback [skew] (crc, 1990)](https://media.store123doc.com/images/document/14/ri/up/small_uph1396501430.jpg)
Báo cáo y học: " Effect of Weight Reduction on Cardiovascular Risk Factors and CD34-positive Cells in Circulatio"
... cholesterol (in fasting samples) was determined by calculation. CD34 -positive cell measurements The analysis of the CD34 positive cells was per-formed by adopting the gating strategy defined ... psychological fac-tors. Adipose tissue can be considered as an endocrine organ that mediates biological effects on the metabo-lism and inflammation, contributing to the mainte-nance of energy ... adiposity. The goal of our study was to examine how car-diovascular risk factors and circulating CD34 -positive cell numbers correlate when overweight subjects at-tempt to lose weight through calorie...
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Báo cáo y học: "A k2A-positive Klebsiella pneumoniae causes liver and brain abscess in a Saint Kitt’s ma"
... â Ivyspring International Publisher. All rights reserved Short Research Communication A k2A -positive Klebsiella pneumoniae causes liver and brain abscess in a Saint Kitt’s man Melissa S. ... Balachandar3, Lisa Schneper2, Robert Poppiti4, and Kalai Mathee2 1. Department of Biological Sciences, College of Arts and Sciences, Florida International University, Miami, Florida ... (normal: 25-35) seconds, respectively. The patient’s IgM and IgG serology for dengue fever were positive. His condition continued to worsen. He was transfused multiple units of fresh frozen...
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Báo cáo y học: "Comparison of Classical and Clozapine Treatment on Schizophrenia Using Positive and Negative Syndrome Scale of Schizophrenia (PANSS) and SPECT Imaging"
... these studies, both positive and negative symptoms seem to be improved with Clozapine. In addition, some studies have shown that negative symptoms improve in direct relation to positive symptoms ... general psychopathology, anergia, positive and negative symptoms, in compare with the classic group, which was in decreasing order; general psychopathology, positive and negative symptoms. This ... symptoms showed linkage to hypofrontality in both groups before and after treatment, and both positive and negative symptoms were improved more with Clozapine therapy than with classical treatment....
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Báo cáo y học: " High-intensity non-invasive positive pressure ventilation for stable hypercapnic COPD
... noninvasive positive pressure ventilation aimed at a maximal reduction of PaCO2. Chest. 2005; 128:657-62. [9] Windisch W, Dreher M, Storre JH, Sorichter S. Nocturnal non-invasive positive pressure ... The objective of the present analysis is to describe the outcomes of high-intensity non-invasive positive pressure ventilation (NPPV) aimed at maximally de-creasing PaCO2 as an alternative to ... Controlled NPPV with breathing frequencies of 21±3 breath/min and mean inspi-ratory/expiratory positive airway pressures of 28±5/5±1 cmH2O led to significant im-provements in blood gases,...
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editing audio loops.
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An action research on the use of continuous feedback to improve the first year students' pronunciation at the english department, college of foreign languages, vietnam national university, hanoi part 2
... forms of corrective feedback in the class: peer feedback from other students, and teacher’s feedback. * Out-of-class feedback Beside in-class feedback, the teacher required the students to attend ... of feedback brought to them, so they were eager to come and did their task seriously.3.5.2 Feedback typesThree types of feedback were exploited during the research. The first type of feedback ... their speech to provide corrective feedback. Despite the inevitable importance of feedback, there have been very few researches focusing on the use of feedback to improve students’ performance....
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