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Degradation of methylene Blue and rhodamine B Using a New Visible Light-responsive Photocatalyst, kSb_2PO_(8-x)N_y

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Acta metallurgica Sinica(English Letters) 2016年第4期29卷 335-343页

作者： g.ravi CH.Sudhakar reddy k.Sreenu ravinder guje radha Velchuri m.Vithal Department of Chemistry University College of ScienceOsmania University

Potassium phosphatoantimonates, kSb2PO8 （kSbPO） and kSb2PO8-xNy （kSbPON）, are prepared by solidstate method. Urea is employed as a source of nitrogen for N-doping. Structural, morphological and optical properties of both kSbPO and kSbPON are characterized by powder X-ray diffraction （PXrD）, scanning electron microscopy, energydispersive spectroscopy, Fourier transform infrared spectroscopy and UV-visible diffuse reflectance spectroscopy. Both samples are found to crystallize in a monoclinic lattice with Cc space group. The d-lines of kSbPO and kSbPON are refined by least square fitting the PXrD data, using POWD software to obtain their unit cell parameters. The bandgap energy （Eg） of both pristine and N-doped kSbPO is found from their kubelka-munk plot. The kSbPON/visible photocatalytic degradation of methylene blue and rhodamine B has been investigated in aqueous heterogeneous suspension. The generation of .OH in the presence of kSbPON during the photoreaction is verified by a fluorescence technique using terephthalic acid （ta） as a probe.

关键词： Potassium phosphatoantimonates Characterization Organic dyes Photodegradation

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Candidate Eclipsing Binary Systems with a δ Scuti Star in Northern TESS Field

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research in Astronomy and Astrophysics 2022年第8期22卷 36-50页

作者： F.kahraman Ali?avu? D.gümü? ?.k?rm?z?ta? ?.Ekinci S.?avu? Y.T.kaya F.Ali?avu? ?anakkale Onsekiz mart University Faculty of Sciences and Arts Physics Department ?anakkale Onsekiz mart University Astrophysics Research Center and Ulupnar Observatory Istanbul University Institute of Graduate Studies in Science Programme of Astronomy and Space Sciences ?anakkale Onsekiz mart University School of Graduate Studies Department of Physics ?anakkale Onsekiz mart University School of Graduate Studies Department of Space Sciences and Technologies ?anakkale Onsekiz mart University Faculty of Engineering Computer Engineering

The existence of pulsating stars in eclipsing binaries has been known for decades. These types of objects are extremely valuable systems for astronomical studies as they exhibit both eclipse and pulsation variations. The eclipsing binaries are the only way to directly measure the mass and radius of stars with a good accuracy(≤1%),while the pulsations are a unique way to probe the stellar interior via oscillation frequencies. There are different types of pulsating stars existing in eclipsing binaries. One of them is the δ Scuti variables. Currently, the known number of δ Scuti stars in eclipsing binaries is around 90 according to the latest catalog of these variables. An increasing number of these kinds of variables is important to understand the stellar structure, evolution and the effect of binarity on the pulsations. Therefore, in this study, we focus on discovering new eclipsing binaries with δ Scuti component(s). We searched within the northern Transiting Exoplanet Survey Satellite(TESS) field with a visual inspection by following some criteria such as light curve shape, the existence of pulsation like variations in the out-of-eclipse light curve and the Teffvalues of the targets. As a result of these criteria, we discovered some targets. The orbital variations were first removed from the TESS light curves and frequency analysis was performed on the residuals. The luminosity, and absolute and bolometric magnitudes of the targets were calculated as well. To find how much of these parameters represent the primary(more luminous) binary component, we also computed the flux density ratio of the systems by utilizing the area of the eclipses. In addition, the positions of the systems in the H-r diagram were examined considering the flux density ratios. As a consequence of the investigation, we defined 38 candidate δ Scuti stars and also one maia variable in eclipsing binary systems.

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近40 a昆仑山北麓典型河流生态基流时空特征

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长江科学院院报 2024年第1期41卷 44-51页

作者：胡可可何建村赵健塔依尔苏里坦中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室乌鲁木齐830011 中国科学院大学资源与环境学院北京100049 新疆维吾尔自治区水利厅水资源规划研究所乌鲁木齐830000

生态基流是河流生态系统健康稳定的关键,对于水资源缺乏的干旱区内陆河流尤为重要。以昆仑山北麓克里雅河、尼雅河与车尔臣河3条典型季节性内陆河为研究对象,选取1978—2014年流域水文数据,利用QP法、Tennant法、近10 a最枯月平均流量法... 详细信息

生态基流是河流生态系统健康稳定的关键,对于水资源缺乏的干旱区内陆河流尤为重要。以昆仑山北麓克里雅河、尼雅河与车尔臣河3条典型季节性内陆河为研究对象,选取1978—2014年流域水文数据,利用QP法、Tennant法、近10 a最枯月平均流量法和Texas法4种水文学方法,计算确定河流生态基流并据此分析其时空分异特征与影响因素。结果表明:Tennant法更适合昆仑山北麓河流生态基流计算。从时间变化来看,3条河生态基流年内最大值均出现在7月份,最小值均出现在1月份;年生态基流最大值均出现在2010年左右,最小值在1980年前后,分别以1.378、0.653、3.066 m^(3)/s·(10 a)^(-1)的速度增加。3条河流生态基流空间分布,春季表现为车尔臣河>克里雅河>尼雅河,夏季和秋季均表现为克里雅河>车尔臣河>尼雅河,且同一河流波动变化明显,不同河流之间变化差异不显著(p>0.05)。影响生态基流年内时空差异的主要因素分别是气温、降水和人类活动,其中以车尔臣河流域气温、降水与生态基流的相关性最强,相关系数r分别为0.876、0.917。考虑生态基流时空分布与流域气候变化特征,综合提出3条河流年内各月生态基流管控目标。研究结果可为昆仑山北麓河流生态保护与水资源管理调度提供参考。

关键词：生态基流时空特征 Tennant法管控目标昆仑山北麓

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多壁纳米碳管对磷酸铁锂正极材料热稳定性及表面形貌的影响(英文)

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新型炭材料 2013年第1期28卷 1-7页

作者： mária Filkusová Andrea Fedorková renáta Oriňáková Andrej Oriňák Zuzana Nováková Lenka Skantárová Department of Physical and Theoretical Chemistry Faculty of Science Comenius University Mlynská|Dolina SK-842 15 Bratislava 4 Slovak Republic Department of Physical Chemistry Faculty of Science P.J. afárik University Moyzesova 11 SK-04154 Koice Slovak Republic Department of Electrical and Electronic Technology Faculty of Electrical Engineering and Communication Brno University of Technology Czech Republic Department of Analytical Chemistry Faculty of Science Comenius University Mlynská|Dolina SK-842 15 Bratislava 4 Slovak Republic

合成了一种新型的LiFePO4/多壁纳米碳管(mWCNTs)复合正极材料。通过mWCNTs和PPy-PEg粘结剂有机地在LiFePO4颗粒间构成三维网络导电结构,并借助SEm、TgA和高分辨裂解气相色谱,研究了LiFePO4-mWCNT正极材料的表面形貌和热稳定性。结果表明... 详细信息

合成了一种新型的LiFePO4/多壁纳米碳管(mWCNTs)复合正极材料。通过mWCNTs和PPy-PEg粘结剂有机地在LiFePO4颗粒间构成三维网络导电结构,并借助SEm、TgA和高分辨裂解气相色谱,研究了LiFePO4-mWCNT正极材料的表面形貌和热稳定性。结果表明,500℃下该材料的热分解程度非常小,说明mWCNTs和PPy-PEg的复合是提高LiFePO4正极材料的热稳定性和改善表面形貌的有效途径。

关键词：多壁纳米碳管多吡咯磷酸铁锂锂离子电池

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Plasma carnitine ester profile in adult celiac disease patients maintained on long-term gluten free diet

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World Journal of gastroenterology 2005年第42期11卷 6671-6675页

作者： Judit Bene katalin komlósi Beáta gasztonyi márk Juhász Zsolt Tulassay Béla melegh Department of medical genetics and Child Development School of medicine University of Pécs Hungary MTA PTE Clinical Genetics Research Group of Hungarian Academy of Sciences at the University of Pécs Hungary Department of medical genetics and Child Development School of medicine University of Pécs Hungary 1st Department of medicine School of medicine University of Pécs Hungary 2nd Department of medicine Semmelweis University Budapest Hungary

AIm： To determine the fasting plasma carnitine ester in patients with celiac disease. mETHODS： We determined the fasting plasma carnitine ester profile using ESI triple quadrupol mass spectrometry in 33 adult patients with biopsy-confirmed maturity onset celiac disease maintained on long term gluten free diet. rESULTS： The level of free camibine did not differ as the celiac disease patients were compared with the healthy controls, whereas the acetylcarnitine level was markedly reduced （4.703± 0.205 vs 10.227 ± 0.368 nmol/mL, P〈0.01）. The level of propionylcarnitine was 61.5%, butyrylcarnitine 56.9%, hexanoylcarnitine 75%, octanoylcarnitine 71.1%, octenoylcarnitine 52.1%, decanoylcarnitine 73.1%, cecenoylcarnitine 58.3%, lauroylcarnitine 61.5%, miristoylcarnitine 66.7%, miristoleylcarnitine 62.5% and oleylcarnitine 81.1% in the celiac disease patients compared to the control values, respectively （P〈0.01）. CONCLUSION： The marked decrease of circulating acetylcarnitine with 50-80 % decrease of 11 other carnitine esters shows that the carnitine ester metabolism can be influenced even in clinically asymptomatic and well being adult celiac disease patients, and gluten withdrawal alone does not necessarily normalize all elements of the disturbed carnitine homeostasis.

关键词： Plasma carnitine ester profile Celiac disease

Fluid dynamics analysis and pyrolysis of brewer’s spent grain in a spouted bed reactor

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Particuology 2019年第1期17卷 199-207页

作者： marcos A.S. Barrozo Lidja D.m.S. Borel taísa S. Lira Carlos H. Ataíde School of Chemical Engineering Federal University of UberlandiaBrazil Department of Engineering and Technologies Federal University of Espirito SantoBrazil

Brewer’s spent grain (BSg) is a large-scale agroindustrial waste that could be more efficiently utilized. This waste is composed of lignocellulosic material and so may serve as a good source of biomass for thermochemical conversion. The present study investigated the fluid dynamics behavior of mixtures of sand and BSg in a spouted bed to assess the viability of the thermochemical conversion of this biomass via fast pyrolysis. Fluid dynamics analyses were performed while varying the mass fraction of BSg (6–80%) and the static bed height (6.6–13.4 cm). Empirical equations for predicting the minimum spouting conditions and the mixing index were obtained using a regression technique, and the selected fluid dynamics parameters were employed in the spouted bed pyrolysis. The bio-oil resulting from this process was rich in phenolic compounds, various nitrogenated compounds (representing precursors for pharmaceuticals) and long-chain hydrocarbons. The products obtained from the analytical and spouted bed pyrolysis processes were also compared.

关键词： Brewer’s spent grain Agroindustrial residue Spouted bed Fast pyrolysis Particle mixing

In vivo measurement of NADH fluorescence lifetime in skeletal muscle via -ber-coupled time-correlated single photon counting

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Journal of Innovative Optical Health Sciences 2024年第1期17卷 121-134页

作者： kathryn m.Priest Jacob V.Schluns Nathania Nischal Colton L.gattis Jeffrey C.Wolchok Timothy J.muldoon Department of Biomedical Engineering University of Arkansas FayettevilleARUSA

Nicotinamide adenine dinucleotide(NADH)is a cofactor that serves to shuttle electrons during metabolic processes such as glycolysis,the tricarboxylic acid cycle,and oxidative phosphorylation(OXPHOS).NADH is autofluorescent,and itsfluorescence lifetime can be used to infer metabolic dynamics in living ***-coupled time-correlated single photon counting(TCSPC)equipped with an implantable needle probe can be used to measure NADH lifetime in vivo,enabling investigation of changing metabolic demand during muscle contraction or tissue *** study illustrates a proof of concept for point-based,minimally-invasive NADHfluorescence lifetime measurement in *** muscle loss(VmL)injuries were created in the left tibialis anterior(ta)muscle of male Sprague Dawley *** lifetime measurements were collected before,during,and after a 30 s tetanic contraction in the injured and uninjured ta muscles,which was subsequently-t to a biexponential decay model to yield a metric of NADH utilization(cytoplasmic vs protein-bound NADH,the A11/A22 ratio).On average,this ratio was higher during and after contraction in uninjured muscle compared to muscle at rest,suggesting higher levels of free NADH in contracting and recovering muscle,indicating increased rates of *** injured muscle,this ratio was higher than uninjured muscle overall but decreased over time,which is consistent with current knowledge of inflammatory response to injury,suggesting tissue regeneration has *** data suggest that-ber-coupled TCSPC has the potential to measure changes in NADH binding in vivo in a minimally invasive manner that requires further investigation.

关键词： glycolysis oxidative phosphorylation energy metabolism volumetric muscle loss

Synergistic protection of Si anode based on multi-dimensional graphitic carbon skeletons

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Nano research 2022年第9期15卷 8146-8155页

作者： Qitao Shi Haiming Wang Junhua Zhou HuyQuang ta Jiaqi Wang Xueyu Lian klaudia kurtyka Barbara Trzebicka Thomas gemming mark H.rümmeli Soochow Institute for Energy and materials Innovation College of EnergyKey Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceSoochow UniversitySuzhou 215006China Institute for Complex materials IFW Dresden20 Helmholtz StrasseDresden 01069Germany Centre of Polymer and Carbon materials Polish Academy of SciencesM.Curie-Sklodowskiej 34Zabrze 41-819Poland Thomas gemming-Institute of Environmental Technology VSB-Technical University of Ostrava17.Listopadu 15Ostrava 70833Czech Republic

Inspired by the natural corn structure,a Si@hollow graphene shell@graphene(Si@gS@g)anode material was prepared in which silicon nanoparticles were preliminarily anchored onto the surface of an elastic graphene shell and further constrained using graphene *** graphene oxide shells with abundant surficial hydrogen bonds,which were synthesized using a novel bottom-up method,were used as an intermediate material to anchor positively charged silicon nanoparticles via electrostatic attraction and achieve a rational spatial *** inner hollow graphene shell anchorage and outer graphene constraint synergistically constituted a porous and robust conductive corn-like *** as-fabricated Si@gS@g anode afforded efficient electron and ion transport pathways and improved structural stability,thereby enhancing Li+storage capability(505 mAh·g^(−1)at 10 A·g^(−1))and extending the lifespan compared to the single hollow graphene shell or graphene sheet-protected Si anode(72%capacity retention after 500 cycles).The improved kinetics of the Si@gS@g anode were investigated using electro impedance spectroscopy,galvanostatic intermittent titration,and pseudocapacitance contribution rate analysis,and the structural evolution was analyzed using ex situ electron *** study proposes a novel hollow graphene oxide shell as an activated intermediate material for designing a porous electrode structure that facilitates an enhanced electrochemical performance.

关键词： synergistic protection multi-dimensional graphitic carbons corn-like structure elastic skeleton Si/C anode

Feasibility Study on Fabrication of geopolymer Bricks by Wasted grinding Wheel at room Temperature

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Journal of renewable materials 2020年第12期8卷 1657-1670页

作者： Yi-Che Hsieh ta-Wui Cheng Chia-Ho Wu Department of materials and mineral resources Engineering National Taipei University of TechnologyTaipei10608Taiwan Institute of mineral resources Engineering National Taipei University of TechnologyTaipei10608Taiwan

In this study,the feasibility of producing eco-friendly bricks by using geopolymer technology and a waste grinding wheel(WgW)from the grinding wheel industries was ***,in order to meet industrial needs,for instance,in taiwan,approximately 500,000 grinding wheels are used *** is,a large number of“waste”grinding wheels are ***,few studies have been conducted on the use of WgWs as raw materials in geopolymer *** use of geopolymer technology to form bricks can avoid the utilization of clay and cement and even prevent the use of a high-temperature process in ***,it can decrease CO_(2) emission and energy consumption and thus,protect the *** this study,the following three major factors were considered:press-forming pressure(70 and 100 kgf/cm2),NaOH molar concentration(2 and 4m),and the ratio of binder fineaggregate(1:3,1:4,and 1:5).Under these conditions,the specimens were tested using the compressive strength test,water absorption test,microstructure analysis,a freezing–thawing test and toxicity characteristic leaching procedure *** optimal formulation was composed of 1:4 binder fine-aggregate ratio,4m NaOH concentration,and 100-kgf/cm2 ***,we used a WgW and achieved a compressive strength of 50.6 mPa after 28 days,which was greater than 32 mPa and conformed to the grade A brick standard of National Standards of the republic of China(13295).In conclusion,this brick fabrication method based on geopolymer technology was not only beneficial to the environment but also improved the efficiency of reutilizing WgW.

关键词： geopolymer waste grinding wheel geopolymer bricks