Backgrounds:Tannic acid(TA),as a plant-derived phenolic substance,is involved in regulating the activity of starch digestive enzymes,but its underlying mechanism remains *** andresults:In the present study,inhibition...
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Backgrounds:Tannic acid(TA),as a plant-derived phenolic substance,is involved in regulating the activity of starch digestive enzymes,but its underlying mechanism remains *** andresults:In the present study,inhibition rate and inhibition kinetics assays were performed and confrmed that TA had a strong inhibitory effect on bothα-amylase andα-glucosidase with IC50 values of 0.1585 mg/mL and 0.00542 mg/mL,respectively,through a mixed inhibition *** secondary structures of both enzymes were confrmed to be modifed by TA through circulardichroism(Cd)*** quenching analysis revealed that the interaction between TA and two enzymes was a static process of pontaneous complex ***,moleculardocking revealed that non-covalent bonds were the main interaction forces between TA and both ***:Thus,TA was a promising candidate for the inhibition of starch-digesting enzymes,and the present research provided insight into postprandial glucose regulation through polyphenols.
deploying horizontal well is one of the efficient methods to enhanced oil recovery. Maximum reservoir Contact (MrC) well, based on the horizontal well, which indicates the contacting area of wellbore andreservoir sho...
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ISBN:
(纸本)9781613999813
deploying horizontal well is one of the efficient methods to enhanced oil recovery. Maximum reservoir Contact (MrC) well, based on the horizontal well, which indicates the contacting area of wellbore andreservoir should be as large as possible to obtain the optimum exploration effects. The purpose of this paper is to build an assessment and optimization work-flow, which guides the well pattern improvement and well-type selection via a case study of the filedr in a Middle East Carbonate reservoir. Analyzing several fielddevelopment index, like production performance, gas oil ratio, water cut, pressure, etc. in a pilot-scale well pattern both for the conventional horizontal wells and MrC wells using different injection schemes, including injection timing, injection volume, and injection components, via reservoir numerical simulation. The method using to evaluating reservoir exploration effect in this paper is numerical simulation, assuming different development strategies and well-type, via reservoir numerical simulator. Control-variate method as well as used in this study, which focus on keeping single factor analysis for the simulation. Comparing all the fielddevelopment indexes among different cases while keeping other factors consistent, for example, exploring the influence from well types, which are MrC well and conventional horizontal well, two cases must be deployed the same injection schemes. Simulating different cases with analyzing the results, MrC wells obtain the better oil production generally compared with conventional horizontal wells. However, oil production performance is not the only index which is cared for in oil & gas industry, additionally, in terms of reservoir engineering, water cut, water breakthrough, gas breakthrough, gas oil ratio, oil steady production plateau, etc., while some economic indexes are extremely concerned by the experts and companies. Consequently, assessment of MrC wells effect should consider many factors from the perspe
Medium-entropy alloys(MEAs)that exhibit transformation-induced plasticity(TrIP)from face-centered cubic(FCC)to body-centered cubic(BCC)are considered promising for liquid hydrogen environments due to theirremarkable ...
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Medium-entropy alloys(MEAs)that exhibit transformation-induced plasticity(TrIP)from face-centered cubic(FCC)to body-centered cubic(BCC)are considered promising for liquid hydrogen environments due to theirremarkable cryogenic ***,studies on hydrogen embrittlement(HE)in BCC-TrIP MEAs have not been conducted,although the TrIP effect and consequent BCC martensite usually deteri-orate HE *** these alloys,initial as-quenched martensite alters hydrogen diffusion and trap behavior,anddeformation-induced martensitic transformation(dIMT)provides preferred crack propaga-tion sites,which critically affects HE ***,this study aims to investigate the HE behav-ior of BCC-TrIP MEAs by designing four V10Cr10Co30Fe50-xNix(x=0,1,2,and 3 at％)MEAs,adjusting both the initial phase constituent and phase metastability.A decreased Ni content leads to a reduced fraction and mechanical stability of FCC,which in turn increases HE susceptibility,as determined through electro-chemical hydrogen pre-charging and slow-strain rate tests The permeation test and thermal desorption analysis reveal that the hydrogen diffusivity and content are affected by initial BCC fraction,interconnec-tivity of BCC,andrefined *** these initial phase constituents differ between the alloys with FCC-and BCC-dominant initial phase,microstructural factors affecting HE are unveileddiscretely among these al-loy groups by correlation of hydrogen-induced crack behavior with hydrogen diffusion and trap *** alloys with an FCC-dominant initial phase,the initial BCC fraction anddIMT initiation rate emerge as critical factors,rather than the extent of *** BCC-dominant alloys,the primary contributor is an increase in the initial BCC fraction,rather than the extent orrate of *** unraveledroles of microstructural factors provide insights into designing HE-resistant BCC-TrIP MEAs.
The objective of this study was to explain the physiological mechanisms through which Na_(2)SeO_(3) mitigates the growth anddevelopmental inhibition of pakchoi under HgCl_(2)*** results showed that treatment with HgC...
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The objective of this study was to explain the physiological mechanisms through which Na_(2)SeO_(3) mitigates the growth anddevelopmental inhibition of pakchoi under HgCl_(2)*** results showed that treatment with HgCl_(2)(40 mg L^(−1))led to reduced biomass,dwarfing,root shortening,androot tip necrosis in *** to control(CK),the activities of superoxide dismutase(SOd)and peroxidase(POd)in Hg treatment increased,and the content of malondialdehyde(MdA)also dramatically increased,which negatively impacted the growth of *** concentrations of Na_(2)SeO_(3)(0.2 mg L^(−1))significantly increased the content of soluble sugars compared with control,while chlorophyll,soluble proteins,free amino acids,and vitamin C had no significant *** results of the mixed treatments with HgCl_(2)and Na_(2)SeO_(3) suggested that selenium may be able to reduce the toxicity of mercury in *** biomass,plant height,root length,chlorophyll content,soluble protein,other physiological indicators,and proline showed significant increases compared with the HgCl_(2)***,the MdA content and mercury accumulation in pakchoi *** results revealed the antagonistic effects of selenium and mercury in ***,a theoretical basis for studying pakchoi’s mercuryexcreted and selenium-rich cultivation technology was provided.
Two-dimensional(2d)ferromagnetic crystals with fascinating optical and electrical properties are crucial for nanotechnology and have a wide variety of applications in ***,low Curie temperatures of most 2d ferromagneti...
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Two-dimensional(2d)ferromagnetic crystals with fascinating optical and electrical properties are crucial for nanotechnology and have a wide variety of applications in ***,low Curie temperatures of most 2d ferromagnetic crystals seriously hinder their practical applications,thus searching for intrinsic roomtemperature 2d ferromagnetic crystals is of great importance fordevelopment of information ***,progresses have been achieved in the last few *** we review recent advances in the field of intrinsic room-temperature 2d ferromagnetic crystals and introduce their applications in spintronic devices based on van der Waals ***,the remaining challenge and future perspective on the developmentdirection of intrinsic room-temperature 2d ferromagnetic crystals for 2d spintronics and van der Waals spintronics are briefly summarized.
The optimal selection of drilling rigs is crucial for the rational arrangement of drilling rigs in multi operation teams, the improvement of moving operation management level, and the enhancement of drilling operation...
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To understand the sealing characteristics of temporary plugging agents (TPA) in the borehole, a system was established for simulating high pressure temporary plugging experiments. The influence of the type and the con...
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deepwater oil and gas wells experience elevated wellbore temperatures during exploratory well testing and production well production, which generate expansion pressure and the phenomenon of elevated annulus pressure (...
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Mental fatigue recognition by heart rate variability analysis in a photoplethysmography (PPG) device in terms of pulse rate variability (PrV) is gathering interest for stress relief and well-being applications. To rea...
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ISBN:
(数字)9798331516451
ISBN:
(纸本)9798331516468
Mental fatigue recognition by heart rate variability analysis in a photoplethysmography (PPG) device in terms of pulse rate variability (PrV) is gathering interest for stress relief and well-being applications. To realize mental fatigue recognition systems, many studies have been conducted, which showed the high accuracy of such systems evaluations. However, there are limitations in generalization due to the lack of consideration of the physiological mechanism. In this study, we developed a framework for investigating mental fatigue recognition using physiologically interpretable deep neural network (dNN) in a wrist-worn PPG device. Furthermore, we developed a novel feature extraction method that captures the temporal accumulation of arousal states to consider the perspective of cognitive resource consumption. The results suggest that the method we developed improved the mental fatigue recognition performance of the wrist-worn PPG device throughout our experiments (an accuracy of 0.90 and an F1 score of 0.91). In addition, it was observed that the method for the wrist-worn PPG device enhanced the contribution of HrV indices, known to be associated with cognitive function. The findings demonstrate that the proposed approach enhances not only accuracy but also the physiological interpretability of the model in PPG devices.
The temperature is as high as 500 °C at the bottom of shale oil wells during in-situ development. during shale oil production, the fluids with high temperature are transmitted to the wellhead, and the wellbo...
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