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Exergy-energy analysis of full repowering of a steam power plant

S. NIKBAKHT NASERABAD,K. MOBINI,A. MEHRPANAHI,M. R. ALIGOODARZ

Frontiers in Energy 2015, Volume 9, Issue 1, Pages 54-67 doi: 10.1007/s11708-014-0342-6

Abstract: For each flow rates, two types of gas turbines have been examined: V94.2 and V94.3A.generator (HRSG) with reheat which obtains its required heat from the exhaust gases coming from the gasturbines.This maximum efficiency occurs when utilizing two V94.3A gas turbines without duct burner in the steam

Keywords： full repowering exergy analysis V94.2 and V94.3A gas turbines double-pressure HRSG duct burner Bandarabbas

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Effect of exhaust gas recirculation and ethyl hexyl nitrate additive on biodiesel fuelled diesel engine

R MURTHY, V. V. SUBBARAO, K. Vijaya KUMAR

Frontiers in Energy 2012, Volume 6, Issue 3, Pages 304-310 doi: 10.1007/s11708-012-0195-9

Abstract: Exhaust gas recirculation (EGR) proved to be an effective way to reduce the NO emissions.In this present experimental work, a combination of exhaust gas recirculation and cetane improver ethylpercentage of EGR which is accompanied by a reduction in brake specific fuel consumption and exhaust gas

Keywords： additive exhaust gas recirculation (EGR) emissions ethyl hexyl nitrate (EHN) performance

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Statistical modeling of radiolytic (

Kavithakani, V. C. Padmanaban

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 3, doi: 10.1007/s11783-019-1126-3

Abstract:

Linear, interactive and quadratic effects of process parameters were studied.

Degradation of Ofloxacin (Ofx) was related with G value of irradiation process.

The synergistic effect of H₂O₂on lower dose of g-irradiation was established.

The process follows pseudo first order with dose constant (d = 0.232 kGy^–¹).

Keywords： Ofloxacin Gamma irradiation Face centered central composite design Reaction kinetics Gas Chromatography-Mass

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Autoimmunity in acute ischemic stroke and the role of blood—brain barrier: the dark side or the light one?

Nikolay V. Tsygan, Alexandr P. Trashkov, Igor V. Litvinenko, Viktoriya A. Yakovleva, Alexandr V.

Frontiers of Medicine 2019, Volume 13, Issue 4, Pages 420-426 doi: 10.1007/s11684-019-0688-6

Abstract: This article presents a synopsis of the current data on the mechanisms of blood—brain barrier (BBB) alteration and autoimmune response in acute ischemic stroke. Most researchers confirm the relationship between the severity of immunobiochemical changes and clinical outcome of acute ischemic stroke. Ischemic stroke is accompanied by aseptic inflammation, which alters the brain tissue and exposes the co-stimulatory molecules of the immune system and the neuronal antigens. To date, BBB is not considered the border between the immune system and central nervous system, and the local immune subsystems are found within and behind the BBB. BBB disruption contributes to the leakage of brain autoantigens and induction of secondary autoimmune response to neuronal antigens and long-term inflammation. Glymphatic system function is altered and jeopardized both in hemorrhagic and ischemic stroke types. The receptors of innate immunity (toll-like receptor-2 and toll-like receptor-4) are also involved in acute ischemia—reperfusion injury. Immune response is related to the key processes of blood clotting and fibrinolysis. At the same time, the stroke-induced immune activation may promote reparation phenomena in the brain. Subsequent research on the reduction of the acute ischemic brain injury through the target regulation of the immune response is promising.

Keywords： stroke blood–brain barrier autoimmunity innate immunity inflammation cell death

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Emulsification for castor biomass oil

Dongxiang ZHANG, Yuanping LIN, Anmei LI, V. V. TARASOV

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 1, Pages 96-101 doi: 10.1007/s11705-010-0553-2

Abstract: The effect of the emulsifier formula on the stability of castor oil-water system was studied through compounding three groups of emulsifiers from the aspects of stability factor of absorbance, centrifuge stability, demulsification time in quiescence, appearance of the droplets, and viscosity. The best emulsifier formula for castor biomass oil was the composite formula of sorbitan monooleate and polyoxyethylene sorbitan monostearate. Correlation exists between the stability of emulsion and the viscosity/particle size of the droplets, with better stability in the case of greater viscosity or narrower distribution of particle size in the emulsion of castor oil-water system. Methanol added to the castor oil-water system may decrease the viscosity of the emulsion. Comparing the castor oil-water emulsion with methanol-castor oil-water emulsion, the optimal hydrophilic and lipophilic balance (HLB) value based on castor oil-water system was acquired between 6.6 and 7.5, while the optimal HLB value based on the methanol-castor oil-water system was between 5.5 and 6.0. The optimal HLB value of methanol-castor oil-water system gradually moved to that of castor oil-water emulsion with adding more water.

Keywords： castor oil biomass oil emulsification stability viscosity corrosivity

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Synergistic effect of V and Fe in Ni/Fe/V ternary layered double hydroxides for efficient and durable

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 1, Pages 102-115 doi: 10.1007/s11705-022-2179-6

Abstract: Herein, via a one-pot hydrothermal method, Ni/Fe/V ternary layered double hydroxides (NiFeV-LDH) derivedBy changing the feeding ratio of Fe and V salts, the prepared ternary hydroxides were optimized.At an Fe:V ratio of 0.5:0.5, NiFeV-LDH exhibits outstanding OER activity superior to that of the binarybimetallic hydroxide layers: (a) Fe plays a crucial role as the active site; (b) electron-withdrawing Vstabilizes the high valence state of Fe, thus accelerating the OER process; (c) V further offers great

Keywords： oxygen evolution reaction electrocatalysts ternary layered double hydroxides long-term stability

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A multi-scale model for CO

WEI, V. RUDOLPH, C. T. WEI, Y. QIN

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 1, Pages 20-25 doi: 10.1007/s11705-009-0138-0

Abstract: This paper presents a multi-scale model to simulate the multicomponent gas diffusion and flow in bulkmacro-pores or fractures in coal so as to account for the interaction between diffusion and flow in gasThe results reveal that the gas diffusivities, in particular the micro-pore diffusivities are strongly

Keywords： multi-scale model gas transport coal coalbed methane CO₂ sequestration

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Association between ICU quality and in-hospital mortality of V-V ECMO-supported patients—the ECMO quality

Frontiers of Medicine doi: 10.1007/s11684-023-1014-x

Abstract: explore the influence of intensive care unit (ICU) quality on in-hospital mortality of veno-venous (V-VThe study involved all V-V ECMO-supported patients in 318 of 1700 tertiary hospitals from 2017 to 2019Among the 2563 V-V ECMO-supported patients in 318 hospitals, a significant correlation was found betweenand the total ICU mortality rate were independent risk factors for higher in-hospital mortality of V-VMeanwhile, the V-V ECMO center volume was a protective factor (cutoff of ≥ 50 cases within the 3-year

Keywords： veno-venous extracorporeal membrane oxygenation in-hospital mortality high-volume centers quality control intensive care unit capacity parameters

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A concise review about fracture assessments of brittle solids with V-notches

Hsien-Yang YEH, Bin YANG

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2, Pages 478-485 doi: 10.1007/s11709-019-0520-z

Abstract: review of recent studies about the fracture assessments of elastic brittle solid materials containing V-notchesIn this preliminary and brief survey, elastic stress distributions in V-notched solids are discussed

Keywords： fracture assessment brittle solids V-notches review

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V-shaped substrate for surface and volume enhanced Raman spectroscopic analysis of microplastics

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 11, doi: 10.1007/s11783-022-1578-8

Abstract:

● V-shaped substrate was obtained for SERS analysis of microplastics

Keywords： SERS V-shaped AAO Microplastic Atmospheric aerosol

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Study on modeling and simulation analysis for tailless configured V/STOL

Fan Yong,Zhu Jihong,Meng Xianyu,Liu Kai,Yang Xili

Strategic Study of CAE 2011, Volume 13, Issue 3, Pages 107-112

Abstract:

The mathematical model was studied by mechanical analysis and CFD (computing fluid dynamics) computation. Besides, an intelligent adaptive based control law was proposed and the optimization approach is employed to solve the constrained control allocation problem. The results show good closed loop performance and validate the intelligent optimization approach of constrained control allocation for flight control.

Keywords： tailless configured aerial vehicle V/STOL dynamic modeling flight control

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Observation of a higher JAK2 V617F homozygous mutated clone in polycythemia vera compared to essential

LIU Hongxing, TONG Chunrong, CAI Peng, GU Jiangying, LIN Yuehui, TENG Wen, WANG He, ZHANG Ying, ZHU Ping

Frontiers of Medicine 2008, Volume 2, Issue 3, Pages 309-313 doi: 10.1007/s11684-008-0059-1

Abstract: real-time quantitative polymerase chain reaction (RQ-PCR) assays were developed and performed for JAK2V617FThe results showed that in some samples, the JAK2V617F burden was as low as nearly 1%, and thus moreJAK2V617F-positive samples were detected by RQ-PCR than by SB-ASA assay due to the former higher detectresult shows that the pathogenesis of PV and ET may be related to the mutation allele burden of JAK2V617F

Keywords： specific amplification essential thrombocythemia Single-tube bi-directional JAK2V617F-positive JAK2V617F

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Mortarless structures based on topological interlocking

Arcady V. DYSKIN, Elena PASTERNAK, Yuri ESTRIN

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 2, Pages 188-197 doi: 10.1007/s11709-012-0156-8

Abstract: We review the principle of topological interlocking and analyze the properties of the mortarless structures whose design is based on this principle. We concentrate on structures built of osteomorphic blocks – the blocks possessing specially engineered contact surfaces allowing assembling various 2D and 3D structures. These structures are easy to build and can be made demountable. They are flexible, resistant to macroscopic fractures and tolerant to missing blocks. The blocks are kept in place without keys or connectors that are the weakest elements of the conventional interlocking structures. The overall structural integrity of these structures depends on the force imposed by peripheral constraint. The peripheral constraint can be provided in various ways: by an external frame or features of site topography, internal pre-stressed cables/tendons, or self-weight and is a necessary auxiliary element of the structure. The constraining force also determines the degree of delamination developing between the blocks due to bending and thus controls the overall flexibility of the structure thus becoming a new design parameter.

Keywords： topological interlocking fragmented structures segmented structures constraint delamination bending stiffness

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Processing of high-precision ceramic balls with a spiral V-groove plate

Ming FENG,Yongbo WU,Julong YUAN,Zhao PING

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 1, Pages 132-142 doi: 10.1007/s11465-017-0436-z

Abstract: In this study, a spiral V-groove plate method is employed in processing high-precision ceramic balls.Experimental results demonstrate that the novel spiral V-groove plate method performs better than theconventional concentric V-groove plate method in terms of roundness, surface roughness, diameter difference

Keywords： bearing ceramic ball spiral V-groove kinematic analysis trajectory

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A MYB-INDUCED MECHANISM FOR ENHANCED ASCORBATE IN RED-FLESHED APPLES

Richard V. ESPLEY, Kuilin WANG

Frontiers of Agricultural Science and Engineering Pages 356-357 doi: 10.15302/J-FASE-2021381

Abstract: The results presented in “The anthocyanin biosynthetic regulator MdMYB1 positively regulates ascorbic acid biosynthesis in apple” (An et al., this issue) provide evidence for a new mechanism for the elevation of ascorbate concentration in apple. Using a red-fleshed apple breeding population, the authors show how the anthocyanin-regulating MYB transcription factor, MdMYB1, also increases ascorbate concentrations by directly activating transcription of the dehydroascorbate reductase gene . This gene recycles oxidized ascorbate back to ascorbate, leading to elevated concentrations of vitamin C. These red-fleshed apples have enhanced concentrations of both anthocyanins and ascorbate, both of which are appealing traits for the development of healthier apples.

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Title Author Date Type Operation

Exergy-energy analysis of full repowering of a steam power plant

S. NIKBAKHT NASERABAD,K. MOBINI,A. MEHRPANAHI,M. R. ALIGOODARZ

Journal Article

Effect of exhaust gas recirculation and ethyl hexyl nitrate additive on biodiesel fuelled diesel engine

R MURTHY, V. V. SUBBARAO, K. Vijaya KUMAR

Journal Article

Statistical modeling of radiolytic (

Kavithakani, V. C. Padmanaban

Journal Article

Autoimmunity in acute ischemic stroke and the role of blood—brain barrier: the dark side or the light one?