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81.
George K. Wolfer Jr. Jay L. Neil Jr. W. Barton Rippon 《Journal of Protein Chemistry》1987,6(5):441-454
A general monomer-dimer equilibrium system involving ligand interactions ispresented. Cooperativity features of specific limited
models are analyzed by selecting the appropriate family of equilibrium constants from this general scheme. Each system is
then characterized in terms of Hill coefficient dependency on alterations in values of equilibrium constants and total acceptor
concentration. This method permits comparison of predicted cooperativity trends between systems. Contrasting reports concerning
cooperativity dependencies for certain defined equilibrium systems are compared and the discrepancies resolved. Characteristics
of cooperativity binding patterns are shown to include symmetry about dimerization association constant values, both positive
and negative cooperativity for a single set of parameters, and significant changes in cooperativity features with relatively
small changes in equilibrium parameters. 相似文献
82.
Edward B. Blanchard Maria L. Peters Christiane Hermann Shannon M. Turner Todd C. Buckley Kristine Barton Mark P. Dentinger 《Applied psychophysiology and biofeedback》1997,22(4):227-245
In order to test for the specific therapeutic effects of thermal biofeedback (TBF) for hand warming on vascular headache (HA),
70 patients with chronic vascular HA were randomly assigned to TBF for hand warming, TBF for hand cooling, TBF for stabilization
of hand temperature, or biofeedback to suppress alpha in the EEG. Patients in each condition initially had high levels of
expectation of therapeutic benefit and found the treatment rationales highly credible. Participants in each condition received
12 treatment sessions on a twice-per-week basis. Based on daily HA diary data gathered for 4 weeks prior to treatment and
4 weeks after treatment, HA Index was significantly (p=.003) reduced as was HA medication consumption. There were no differential
reducations in HA Index or Medication Index among the four conditions. Global self-reports of improvement gathered at the
end of the post-treatment monitoring period also did not differ among the four conditions. We were unable to demonstrate a
specific effect of TBF for hand warming on vascular HA activity. 相似文献
83.
84.
Samuel Barton James Jenkins Angus Buckling C.-Elisa Schaum Nicholas Smirnoff John A. Raven Gabriel Yvon‐Durocher 《Ecology letters》2020,23(4):722-733
The efficiency of carbon sequestration by the biological pump could decline in the coming decades because respiration tends to increase more with temperature than photosynthesis. Despite these differences in the short‐term temperature sensitivities of photosynthesis and respiration, it remains unknown whether the long‐term impacts of global warming on metabolic rates of phytoplankton can be modulated by evolutionary adaptation. We found that respiration was consistently more temperature dependent than photosynthesis across 18 diverse marine phytoplankton, resulting in universal declines in the rate of carbon fixation with short‐term increases in temperature. Long‐term experimental evolution under high temperature reversed the short‐term stimulation of metabolic rates, resulting in increased rates of carbon fixation. Our findings suggest that thermal adaptation may therefore have an ameliorating impact on the efficiency of phytoplankton as primary mediators of the biological carbon pump. 相似文献
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Hui Li Shuyi Wang Fang-Hua Lee Ryan S. Roark Alex I. Murphy Jessica Smith Chengyan Zhao Juliette Rando Neha Chohan Yu Ding Eunlim Kim Emily Lindemuth Katharine J. Bar Ivona Pandrea Cristian Apetrei Brandon F. Keele Jeffrey D. Lifson Mark G. Lewis Thomas N. Denny Barton F. Haynes Beatrice H. Hahn George M. Shaw 《Journal of virology》2021,95(11)
87.
Gabor J. Barton Malcolm B. Hawken Gill Holmes Michael H. Schwartz 《Computer methods in biomechanics and biomedical engineering》2013,16(1):57-63
The ability of the Movement Deviation Profile (MDP) and Gait Deviation Index (GDI) to detect gait changes was compared in a child with cerebral palsy who underwent game training. Conventional gait analysis showed that sagittal plane angles became mirrored about normality after training. Despite considerable gait changes, the GDI showed minimal change, while the MDP detected a difference equal to a shift between 10-9 on the Functional Assessment Questionnaire scale. Responses of the GDI and MDP were examined during a synthetic transition of the patient's curves from before intervention to a state mirrored about normality. The GDI showed a symmetric response on the two opposite sides of normality but the neural network based MDP gave an asymmetric response reflecting faithfully the unequal biomechanical consequences of joint angle changes. In conclusion, the MDP can detect altered gait even if the changes are missed by the GDI. 相似文献
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Jennifer L Barton Gabriela Schmajuk Laura Trupin Jonathan Graf John Imboden Edward H Yelin Dean Schillinger 《Arthritis research & therapy》2013,15(5):R157