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A study of the reactions in the zinc chloride-benzaldehyde-glucose systemDorcheus, Samuel H. 01 January 1962 (has links)
No description available.
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Polymer production from aqueous solutions of D-glucose by high energy radiation.Snell, John B. 01 January 1964 (has links)
No description available.
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Linkages between glucose and mannose in slash pine alpha-celluloseAnthis, Austin F. (Austin Forrest) 01 January 1956 (has links)
No description available.
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Functionalized gold nanoparticles as probe for reactive oxygen species and heavy metal ions determinationLin, Cheng-Yan 21 June 2010 (has links)
none
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Effects of carbohydrate applications on growth and vitality of live oak (Quercus virginiana)Martinez Trinidad, Tomas 15 May 2009 (has links)
Urban forests grow in stressful environments that can have negativerepercussions on tree energy reserves. The goal of this research was to evaluate theimpact of exogenously applied carbohydrates on growth and vitality of live oaks(Quercus virginiana P. Miller). An initial study focused on carbohydrate partitioningrevealed that annual mean glucose concentration in leaf tissues (49.55 mg·g-1 DW) wasalmost double that in twigs, trunks, or roots. Starch concentrations in roots and trunks(38.98 and 38.22 mg·g-1 DW of glucose, respectively) were higher during the dormantseason and approximately three times the concentrations found in other tissues. Aninvestigation of the effects of exogenous soil applications of glucose and starch on soilmicrobial activity revealed no significant differences using recoverable viable microbes.However, soil respiration was significantly increased (P<0.05) by glucose a week afterapplication, while higher starch concentrations (120 g·L-1) significantly increased(P<0.05) soil respiration after the fourth week. Although tree soil drenched withcarbohydrates in a different study showed significantly (P<0.05) greener leaf color, higher chlorophyll fluorescence, and increased soil respiration at higher concentrationsof starch (120 g·L-1), no significant differences were observed in photosynthesis or trunk,canopy, or root growth. Analysis of 13C signatures was unable to detect uptake ofexogenous carbohydrates. For trunk-injected trees with glucose and sucrose, trunkgrowth was significantly (P<0.05) increased by carbohydrate supplementation.Differences were also found in twig glucose content, root starch content, and chlorophyllfluorescence among overall concentration means. A study to compare field diagnostictools with carbohydrate laboratory analysis established that a portable blood glucosemeter can be used to measure glucose content in trees. However, ohmmeter,refractometer, chlorophyll fluorescence spectrometer, and iodine staining results did notcorrelate well with laboratory analysis of carbohydrate concentrations. Results fromthese studies reveal that soil applied carbohydrates can greatly increase soil microbialactivity, provide evidence that trunk-injected carbohydrates may improve growth andvitality of live oaks, and provide a new field diagnostic tool to increase the efficiency ofmeasuring carbohydrates in trees.
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Finite Element Modeling of Dermally-implanted Enzymatic Microparticle Glucose SensorsAli, Saniya 2010 August 1900 (has links)
With the rising prevalence of diabetes, effective means of successful management of blood glucose levels are increasingly important. To improve on the ease of measurements, new technology is being developed to enable less invasive measurements. Some recent efforts have focused on the development of optical microscale glucose sensing systems based on the encapsulation of glucose oxidase within microspheres coated with polyelectrolyte multilayer nanofilms. In such sensors, a phosphorescent oxygen indicator is also co-encapsulated with the enzyme inside so that when glucose is present, glucose oxidase within the sensor reduces the local oxygen levels, causing a corresponding change in the luminescence intensity of the sensors.
To test the aforementioned factors, a two-substrate, 2D FEM model of microscale optical glucose sensors in the dermis was developed. The model was used to predict the response time and sensitivity of glucose sensors with varying number and spacing of particles distributed in the dermis and varying physiological characteristics of the surrounding tissue; specifically, capillary density, blood vessel location relative to sensor, and glucose and oxygen consumption in tissue.
Simulations were conducted to determine the magnitude of the change in the response time of sensors. Because the steady-state oxygen concentration within the sensors for a given blood glucose level determines the signal output, steady-state concentration of oxygen within sensors and the surrounding tissue for the entire physiological glucose range was evaluated.
The utility of the model to predict the performance and efficacy of the sensors in the event of a host response to the foreign body implant was also evaluated. Simulations were performed to evaluate changes in sensor response and sensitivity in the occurrence of inflammation and progression of fibrous encapsulation of various thickness and density.
The results from these simulations have provided knowledge on the impact of physiological factors that can potentially degrade sensor function in vivo. Our results indicate that upon the occurrence of a host response, sensitivity is reduced while range is extended. Furthermore, using the model we have been able to determine which conditions in vivo improve response time, sensitivity, and the linear response range for these sensors.
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Application of porous gold enzyme electrode in electrochemical Flow injection analysis.Chang, Jing-shun 13 July 2004 (has links)
None
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noneSu, Chih-lin 14 July 2007 (has links)
none
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Dual wavelength polarimetry for monitoring glucose in the presence of varying birefringenceWan, Qiujie 12 April 2006 (has links)
In a continuing effort to develop a noninvasive means of monitoring glucose levels
using the aqueous humor of the eye, a dual wavelength system has been developed in
order to show that varying birefringence, similar to what is seen with a moving cornea,
can be compensated. In this paper a dual wavelength, closed-loop, system was designed
and a model was developed to extract the glucose concentration information. The system
and model were tested using various concentrations of glucose in a birefringent test cell
subject to motion artifact. The results show that for a static, non-moving sample, glucose
can be predicted to within 10 mg/dl for the entire physiologic range (0-600mg/dl) for
either laser wavelength (523nm or 635nm). In the presence of moving birefringence,
each individual wavelength produced standard errors on the order of a few thousand
mg/dL. However, when the two wavelengths are combined into the developed model,
this error is less than 20mg/dL. The approach shows that multiple wavelengths can be
used to drastically reduce the error in the presence of a moving birefringent sample. This
research also shows promising preliminary results that the error is less than 25mg/dl in
presence of a motion induced cornea birefringence artifact in NZW rabbits eyes.
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Glucose oxidation in heart-type fatty acid binding protein null miceAdhikari, Sean 30 October 2006 (has links)
Heart-type fatty acid binding protein (H-FABP) is a major fatty acid binding
factor in skeletal muscles. Genetic lack of H-FABP severely impairs the esterification
and oxidation of exogenous fatty acids in soleus muscles isolated from chow-fed mice
(CHOW-solei) and high fat diet-fed mice (HFD-solei), and prevents the HFD-induced
accumulation of muscle triglycerides. Here, we examined the impact of H-FABP
deficiency on the relationship between fatty acid utilization and glucose oxidation.
Glucose oxidation was measured in isolated soleus muscles in the presence or absence of
1 mM palmitate (simple protocol) or in the absence of fatty acid after preincubation with
1 mM palmitate (complex protocol). With the simple protocol, the mutation slightly
reduced glucose oxidation in CHOW-muscles, but markedly increased it in HFDmuscles;
unexpectedly, this pattern was not altered by the addition of palmitate, which
reduced glucose oxidation in both CHOW- and HFD-solei irrespective of the mutation. In
the complex protocol, the mutation first inhibited the synthesis and accumulation of
triglycerides and then their mobilization; with this protocol, the mutation increased
glucose oxidation in both CHOW- and HFD-solei. We conclude: (i) H-FABP mediates a
non-acute inhibition of muscle glucose oxidation by fatty acids, likely by enabling both
the accumulation and mobilidoes not mediate the acute inhibitory effect of extracellular fatty acids on muscle glucose
oxidation; (iii) H-FABP affects muscle glucose oxidation in opposing ways, with
inhibition prevailing at high muscle triglyceride contents.zation of a critical mass of muscle triglycerides; (ii) H-FABP
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