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Antioxidant and Photo Catalytic Activity Of Aqueous Leaf Extract Mediated Green Synthesis Of Silver Nanoparticles Using Passiflora Edulis f . flavicarpa

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Materials Today: Proceedings 2019年 14卷 239-247页

作者： Bindu Thomas B. Scholastica Mary Vithiya T. Augustine Arul Prasad Department of Chemistry D.G.Vaishnav College Chennai 600106 India Department of Chemistry Auxillium College (Autonomous) Vellore 632006 India

The purpose of this study is to minimize the negative impacts of synthetic procedures and to develop environmentally benign procedures for the synthesis of metallic nanoparticles. In the present study, Passiflora edulis .f. flavicarpa ( *** ) aqueous leaf extract mediated green synthesis of silver nanoparticles are described. The synthesized silver nanoparticles were characterized by UV-Vis Spectroscopy, fourier Transform Infrared Spectroscopy (fTIR), X-Ray diffraction (XRD), Scanning Electron Microscopy (SEM),) Transmission Electron Microscopy (TEM) .The efficacy of the synthesized silver nanoparticles (AgNPs) was demonstrated as catalyst in the photo catalytic degradation of Methyl Orange and Methylene Blue dyes which were measured spectrophotometrically. The study revealed that biosynthesized silver nanoparticles using Passiflora. Edulis f . flavicarpa, plant extract was found to be very effective as antioxidant agent.

关键词： Green synthesis Silver nanoparticles Passiflora .edulis f . flavicarpa Photo catalytic activity antioxidant

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Prediction of Postoperative Complications: Ventilatory Efficiency and Rest End-tidal Carbon Dioxide

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ANNALS Of THORACIC SURGERY 2023年第5期115卷 1305-1311页

作者： Brat, Kristian Homolka, Pavel Merta, Zdenek Chobola, Milos Heroutova, Michaela Bratova, Monika Mitas, Ladislav Chovanec, Zdenek Horvath, Teodor Benej, Michal Ivicic, Jaroslav Svoboda, Michal Sramek, Vladimir Olson, Lyle J. Cundrle Jr, Ivan Univ Hosp Brno Dept Resp Dis Brno Czech Republic Masaryk Univ Fac Med Brno Czech Republic St Annes Univ Hosp Brno Int Clin Res Ctr Brno Czech Republic St Annes Univ Hosp Dept Sports Med & Rehabil Brno Czech Republic St Annes Univ Hosp Brno Dept Anesthesiol & Intens Care Brno Czech Republic Univ Hosp Brno Dept Surg Brno Czech Republic St Annes Univ Hosp Dept Surg 1 Brno Czech Republic Krankenhaus Nord Klin Floridsdorf Dept Thorac Surg Vienna Austria Inst Biostat & Anal Ltd Brno Czech Republic Mayo Clin Dept Cardiovasc Dis Rochester MN USA St Annes Univ Hosp Dept Anesthesiol & Intens Care Pekarska 53 Brno 65691 Czech Republic

BACKGROUND Cardiopulmonary exercise testing parameters including ventilatory efficiency (VE/VCO2 slope) are used for risk assessment of lung resection candidates. However, many patients are unable or unwilling to undergo exercise. VE/VCO2 slope is closely related to the partial pressure of end-tidal carbon dioxide (PETCO2). We hypothesized PETCO2 at rest predicts postoperative pulmonary *** Consecutive lung resection candidates were included in this prospective multicenter study. Postoperative respiratory complications were assessed from the first 30 postoperative days or from the hospital stay. Student t test or Mann-Whitney U test was used for comparison. Multivariate stepwise logistic regression analysis was used to analyze association with the development of postoperative pulmonary complications. The De Long test was used to compare area under the curve (AUC). Data are summarized as median (interquartile range).RESULTS Three hundred fifty-three patients were analyzed, of which 59 (17%) developed postoperative pulmonary complications. PETCO2 at rest was significantly lower (27 [24-30] vs 29 [26-32] mm Hg;P < .01) and VE/VCO2 slope during exercise significantly higher (35 [30-40] vs 29 [25-33];P < .01) in patients who developed postoperative pulmonary complications. Both rest PETCO2 with odds ratio 0.90 (95% confidence interval [CI] 0.83-0.97);P = .01 and VE/VCO2 slope with odds ratio 1.10 (95% CI 1.05-1.16);P < .01 were independently associated with postoperative pulmonary complications by multivariate stepwise logistic regression analysis. There was no significant difference between AUC of both models (rest PETCO2: AUC = 0.79 (95% CI 0.74-0.85);VE/VCO2 slope: AUC = 0.81 (95% CI 0.75-0.86);P = .48).CONCLUSIONS PETCO2 at rest has similar prognostic utility as VE/VCO2 slope, suggesting rest PETCO2 may be used for postoperative pulmonary complications prediction in lung resection candidates.

关键词： AUC area under the curve CPET cardiopulmonary exercise testing DL CO diffusing lung capacity for carbon monoxide f b breathing frequency fEV 1 forced expiratory volume in one second fVC forced vital capacity ICU intensive care unit LOS length of stay P ET CO 2 partial pressure of end-tidal carbon dioxide PPC postoperative pulmonary complications RER respiratory exchange ratio VCO 2 carbon dioxide output V D dead space volume V E minute ventilation V E /VCO 2 ventilatory efficiency VO 2 oxygen consumption V T tidal volume

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Nanomechanical and Material Properties of fluorine-Doped Tin Oxide Thin films Prepared by Ultrasonic Spray Pyrolysis: Effects of f-Doping

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MATERIALS 2019年第10期12卷 1665-1665页

作者： Le Thi Cam Tuyen Jian, Sheng-Rui Nguyen Thanh Tien Phuoc Huu Le Ton Duc Thang Univ Adv Inst Mat Sci Ceram & Biomat Res Grp Ho Chi Minh City 700000 Vietnam Ton Duc Thang Univ Fac Appl Sci Ho Chi Minh City 700000 Vietnam I Shou Univ Dept Mat Sci & Engn Kaohsiung 840 Taiwan Can Tho Univ Coll Nat Sci 3-2 Rd Can Tho City 94000 Vietnam Can Tho Univ Med & Pharm Fac Basic Sci Dept Phys & Biophys 179 Nguyen Cu St Can Tho City 94000 Vietnam

fluorine-doped tin oxide (fTO) thin films were deposited on glass substrates using ultrasonic spray pyrolysis (USP) at a fixed substrate temperature of 400 degrees C and various fluorine/Tin (f/Sn) atomic ratios of 0, 0.1, 0.5, and 1.0. Effects of f/Sn atomic ratios on structural-morphological, compositional, electrical, optical, and nanomechanical properties of the fTO thin films were systematically studied. The fTO films exhibited a tetragonal structure with preferred orientations of (110), (200), and (211), and polycrystalline morphology with spear-like or coconut shell-like particles on the surfaces. The presence of f-doping was confirmed by XPS results with clear f1s peaks, and f-concentration was determined to be 0.7% for f/Sn = 0.1 and 5.1% for f/Sn = 0.5. Moreover, the resistivity of fTO films reduced remarkably from 4.1 mcm at f/Sn = 0 to 0.7 mcm at f/Sn = 1, primarily due to the corresponding increase of carrier concentration from 2 x 10(20) cm(-3) to 1.2 x 10(21) cm(-3). The average optical transmittance of the films prepared at f/Sn of 0-0.5 was over 90%, and it decreased to 84.4% for the film prepared at f/Sn = 1. The hardness (H) and Young's modulus (E) of the fTO films increased when the f/Sn ratios increased from 0 to 0.5, reaching maximum values of H = 12.3 +/- 0.4 GPa, E = 131.7 +/- 8.0 GPa at f/Sn = 0.5. Meanwhile, the H and E reduced considerably when the f/Sn ratio further increased to 1.0, following the inverse Hall-Petch effect approximately, suggesting that the grain boundary effect played a primary role in manipulating the nanomechanical properties of the fTO films. furthermore, favorable mechanical properties with large H/E-f and ratios were found for the fTO film prepared at f/Sn = 0.5, which possessed high crystallinity, large grain size, and compact morphology.

关键词： fluorine-doped tin oxide (fTO) nanoindentation f Sn atomic ratios ultrasonic spray pyrolysis (USP)

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Ag 3 PO 4 [email protected] 2 nanosheet enhanced f, S-doped BN quantum dot electrochemiluminescence biosensor for K-ras tumor gene detection

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Talanta 2021年 228卷

作者： Yuchen Guo Yixin Nie Zihui Liang Wang Peilin Qiang Ma Department of Gastrointestinal Surgery First Hospital of Jilin University Changchun 130000 China Department of Analytical Chemistry College of Chemistry Jilin University Changchun 130012 China

In this research, a novel Ag 3 PO 4 [email protected] 2 nanosheet-based electrochemiluminescence (ECL) sensing system was developed to provide an effective method for tumor gene detection. At first, fluorine, sulfur-doped BN quantum dot (f, S-BN QD) were prepared as ECL emitter. Sulfur dopant can provide more reactive sites in the ECL reaction. fluorine atoms in the QD structure further improved the stability of the crystal. furthermore, Ag 3 PO 4 [email protected] 2 nanosheets were fabricated via a hydrothermal route as ECL reaction catalyst. On the one hand, Ag 3 PO 4 [email protected] 2 nanosheets promoted the generation of more oxidant of coreactant in the f, S-BN QD/H 2 O 2 coreactant ECL pathway. On the other hand, the excellent conductivity of Ag 3 PO 4 [email protected] 2 nanosheets facilitated the electron transfer and effectively reduce the damage of f, S-BN QD by excessive hot electrons. finally, the proposed biosensor was designed to accurately quantify K-ras tumor gene from 10 fM to 100 pM with a limit of detection (LOD) of 0.2 fM. The sensing system was used to detect K-ras gene in human colorectal cancer tumor and tumor-adjacent tissues samples with satisfactory results. The amplified ECL sensing strategy with Ag 3 PO 4 [email protected] 2 nanosheet has significant potential value in the clinical detection.

关键词： f S-BN QD Ag 3 PO 4 [email protected] 2 nanosheet ECL sensor Tumor gene detection

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Mechanistic insights into f₄₂₀-dependent glucose-6-phosphate dehydrogenase using isotope effects and substrate inhibition studies

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BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2018年第2期1866卷 387-395页

作者： Oyugi, Mercy A. Bashiri, Ghader Baker, Edward N. Johnson-Winters, Kayunta Univ Texas Arlington Dept Chem & Biochem Arlington TX 76019 USA Univ Auckland Sch Biol Sci Lab Struct Biol Auckland 1010 New Zealand Univ Auckland Sch Biol Sci Maurice Wilkins Ctr Mol Biodiscovery Auckland 1010 New Zealand

f-420-dependent glucose-6-phosphate dehydrogenase (fGD) is involved in the committed step of the pentose phosphate pathway within mycobacteria, where it catalyzes the reaction between glucose-6-phosphate (G6P) and the f-420 cofactor to yield 6-phosphogluconolactone and the reduced cofactor, f420H2. Here, we aim to probe the fGD reaction mechanism using dead-end inhibition experiments, as well as solvent and substrate deuterium isotope effects studies. The dead-end inhibition studies performed using citrate as the inhibitor revealed competitive and uncompetitive inhibition patterns for G6P and f-420 respectively, thus suggesting a mechanism of ordered addition of substrates in which the f-420 cofactor must first bind to fGD before G6P binding. The solvent deuterium isotope effects studies yielded normal solvent kinetic isotope effects (SKIE) on kcat and k(cal)/K-m for both G6P and f-420. The proton inventory data yielded a fractionation factor of 0.37, suggesting that the single proton responsible for the observed SKIE is likely donated by Glu109 and protonates the cofactor at position Ni. The steady state substrate deuterium isotope effects studies using G6P and G6P-d(1) yielded KIE of 1.1 for both koo, and K-cat/K-m while the pre-steady state KIE on k(obs), was 1.4. Because the hydride transferred to C5 of f-420 was the one targeted for isotopic substitution, these KIE values provide further evidence to support our previous findings that hydride transfer is likely not rate-limiting in the fGD reaction.

关键词： fGD f 420 -dependent glucose-6-phosphate dehydrogenase G6P glucose-6-phosphate G6P-d 1 glucose-6-phosphate-d 1 G6PD glucose-6-phosphate dehydrogenase f 420 cofactor 7,8-didemethyl-8-hydroxy-5-deazariboflavin-5′-phosphoryllactyl(glutamyl) n glutamate TB Tuberculosis M. smegmatis Mycobacterium smegmatis M. tuberculosis Mycobacterium tuberculosis LC-MS-IT-TOf liquid chromatography mass spectrometry-ion trap-time of flight SKIE solvent kinetic isotope effect k cat (app) apparent turn-over number K m (app) apparent Michaelis-Menten constant k cat / K m catalytic efficiency k obs apparent rate constant

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Dretske and Informational Closure

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MINDS AND MACHINES 2022年第2期32卷 311-322页

作者： Bouchard, Yves Univ Sherbrooke Dept Philosophy & Appl Eth 2500 Blvd Univ Sherbrooke PQ J1K 2R1 Canada

Christoph Jager (Erkenntnis 61:187-201, 2004) has argued that Dretske's (Knowledge and the flow of Information, MIT Press, Cambridge, 1981) information-based account of knowledge is committed to both knowledge and information closure under known entailment. However, in a reply to Jager, Dretske (Erkenntnis 64:409-413, 2006) defended his view on the basis of a discrepancy between the relation of information and the relation of logical implication. This paper shares Jager's criticism that Dretske's externalist notion of information implies closure, but provides an analysis based on different grounds. By means of a distinction between two perspectives, the mathematical perspective and the epistemological perspective, I present, in the former, a notion of logical implication that is compatible with the notion of information in the mathematical theory of information, and I show how, in the latter, Dretske's logical reading of the closure principle is incompatible with his information-theoretic epistemological framework.

关键词： Knowledge Information Closure Conditional f Dretske

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Input-to-state contraction for impulsive systems

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INTERNATIONAL JOURNAL Of CONTROL 2022年第3期95卷 779-789页

作者： Liu, Bin Sun, Zhijie Xu, Bo Liu, Dong-Nan Hunan Univ Technol Coll Sci Zhuzhou 412007 Peoples R China Univ Southern Calif Viterbi Sch Engn Mork Family Dept Chem Engn & Mat Sci Los Angeles CA 90007 USA

This paper investigates the input-to-state contraction for impulsive systems. The notion of input-to-state contraction (ISC) is proposed via incremental input-to-state stability (delta ISS). By using the method of variation, the equivalence between global ISC and exponential delta ISS is established. Then by the technique of the average dwell-time (ADT), some criteria for global ISC and exponential delta ISS are derived for impulsive systems. Moreover, by using impulse frequency (I.f.) to replace ADT, the criteria are improved and less conservative criteria via I.f. are established for global ISC and exponential delta ISS. The criteria are used to derive global ISC and exponential delta ISS for continuous and discrete time systems. Discussions are given to relax the differentiable vector fields. And the criteria of exponential delta ISS via the Lyapunov-like function are derived for impulsive systems satisfying time-varying Lipschitz condition. finally, three examples are worked out for illustrations, where impulsive control is designed for chaotic systems to achieve global ISC.

关键词： Input-to-state stability contraction incremental stability impulsive systems impulse frequency (I f ) variation

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Lif-Nif2 system: high temperature stability study of Li2Nif4(s) and interaction of fuel salts of molten salt reactor with structural material components

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JOURNAL Of SOLID STATE ELECTROCHEMISTRY 2022年第4期26卷 1037-1050页

作者： Mukherjee, Sumanta Dash, Smruti Bhabha Atom Res Ctr Fuel Chem Div Mumbai 400085 Maharashtra India Homi Bhabha Natl Inst HBNI Bhabha Atom Res Ctr Mumbai 400085 Maharashtra India

High temperature interaction of Lif-Nif2 system is characterized with the ternary compound, Li2Nif4(s). The compound has been synthesized by solid state route. Li2Nif4(s) has been characterized with XRD technique and its micro-homogeneity and surface morphology have been tested with EDS and SEM technique, respectively. In order to study the thermodynamic stability, the Gibbs energy of formation, Delta(f)G degrees(m)(T), of Li2Nif4(s) has been measured with solid electrolyte galvanic cell technique and its measured Delta(f)G degrees(m)(T) can be expressed as Delta(f)G degrees(m)(T) [Li2Nif4(s)] / k.J mol(-1) = (-1902.2 +/- 1.1) + (0.3491 +/- 0.0016) x (T/K). Using the experimental thermodynamic data, ternary phase diagram and fluorine potential diagram of Li-Ni-f-2 system have been calculated in order to study the stability domain and coexisting phases of Li2Nif4(s) at reactor operating temperature. The stability of Li2Nif4(s) has also been investigated in the presence of oxygen impurity by calculating chemical potential diagram of Li-Ni-f-O system and ternary phase diagram of Lif-Nif2-O-2 system at the same temperature. In the study, interaction of major structural components, Ni, Cr, and fe, with fuel salt components (Thf4 and Uf4) of MSR has also been investigated at different temperatures.

关键词： Li2Nif4(s) E m f study Ternary phase diagram Ni-based alloy MSR

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粉尘螨过敏原Der f 32的克隆、表达、免疫学鉴定及其对树突状细胞的调节作用研究

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中国寄生虫学与寄生虫病杂志 2019年第3期37卷 279-285页

作者：江贝肖小军欧阳春艳罗新萍孙宝清李靖刘志刚深圳大学生命与海洋科学学院深圳518055 深圳大学过敏反应与免疫学研究所深圳518055 广州医科大学呼吸疾病国家重点实验室广州510120 广州医科大学第一附属医院广州510120

目的克隆、表达粉尘螨Der f 32蛋白,并鉴定其免疫原性及其对树突状细胞(DC)的调节作用。方法合成粉尘螨过敏原Der f 32基因,与pET-24a(+)载体连接,转入大肠埃希菌BL21诱导表达,经亲和层析法纯化后,十二烷基硫酸钠-聚丙烯酰氨凝胶电泳(SD... 详细信息

目的克隆、表达粉尘螨Der f 32蛋白,并鉴定其免疫原性及其对树突状细胞(DC)的调节作用。方法合成粉尘螨过敏原Der f 32基因,与pET-24a(+)载体连接,转入大肠埃希菌BL21诱导表达,经亲和层析法纯化后,十二烷基硫酸钠-聚丙烯酰氨凝胶电泳(SDS-PAGE)分析重组蛋白表达情况,蛋白质印迹(Western blotting)、临床皮肤点刺实验检测重组蛋白的免疫原性。将重组蛋白Der f 32与小鼠来源的DC2.4共培养24 h,设阳性对照组(加等量重组蛋白Der f 1)和阴性对照组(加等量PBS),流式细胞术检测细胞表面共刺激分子(CD40、 CD83和CD80)的表达。将重组蛋白稀释为10、 20、 30、 40、 50、 60μg/ml等不同浓度,分别与DC2.4共培养48 h后, Western blotting分析T细胞免疫球蛋白及黏蛋白域蛋白4 (TIM4)的表达情况。结果SDS-PAGE结果显示,重组蛋白Der f 32相对分子质量(Mr)约35 000。临床皮肤点刺实验表明, 42位尘螨过敏患者中有6例对重组蛋白Der f 32过敏,阳性率为14.2%。Western blotting结果显示,重组蛋白Der f 32能与皮试阳性患者血清IgE抗体特异性结合。流式细胞术检测结果显示,重组蛋白Der f 32与DC2.4共培养后, CD40、 CD83、 CD80的表达水平分别为24.5%、 9.6%和24.6%,高于阴性对照组(11.9%、 3.1%和15.6%)(P <0.01),低于阳性对照组(38.2%、 15.0%和39.1%)(P <0.05)。Western blotting检测结果显示, TIM4的表达量随重组蛋白Der f 32浓度的升高逐渐增加,且在Der f 32浓度为50μg/ml时, TIM4的表达量达到最高, TIM4相对灰度值为1.112。结论获得了具有较强免疫原性的粉尘螨新过敏原Der f 32,该蛋白能促进DC表面分子和TIM4的表达。

关键词：粉尘螨 Der f 32 免疫原性树突状细胞

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Rapid diagnosis of rice bakanae caused by fusarium fujikuroi and f-proliferatum using loop-mediated isothermal amplification assays

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JOURNAL Of PHYTOPATHOLOGY 2018年第4期166卷 283-290页

作者： Rong, Zhenyang Yuan, Yongtian Ye, Wenwu Wang, Xiaoli Zheng, Xiaobo Nanjing Agr Univ Dept Plant Pathol Coll Plant Protect Nanjing Jiangsu Peoples R China

Rice bakanae is an important disease that causes serious rice production loss worldwide. We describe a new method for rapid diagnosis of rice bakanae caused by fusarium fujikuroi and ***, based on loop-mediated isothermal amplification (LAMP) assays. After screening, primers were selected to target fusariumDNA sequences, that is, the intergenic spacer (IGS) region of the nuclear ribosomal operon and reductase-coding region (RED1) in *** and ***, respectively. Both LAMP assays efficiently amplified target genes in 70min at 62 degrees C. A colour change from purple to sky blue (visible to the unaided eye) was observed in the presence of the DNA of the targeted pathogens only, by adding hydroxynaphthol blue to the reaction system prior to amplification. The minimum of genomic DNA needed in the assays was 67 and 346pg/l for *** and ***, respectively. Using the two assays described here, we successfully and rapidly diagnosed suspected diseased rice plant and seed samples collected from Jiangsu Province.

关键词： f proliferatum fusarium fujikuroi LAMP assay rice bakanae

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