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Estimation of the dimension of micropores and mesopores in single walled carbon nanotubes using the method Horvath-Kawazoe, Saito and Foley and BJH equations

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MIcRO & NANO LETTERS 2017年第1期12卷 1-5页

作者： Haghighatju, Fateme Rafsanjani, Hassan Hashemipour Esmaeilzadeh, Feridun Shiraz Univ Petr & Chem Engn Dept Oil & Gas Thermodynam Res Lab Shiraz Iran Shahid Bahonar Univ Dept Chem Engn Kerman Iran

The adsorption isotherm of the single walled carbon nanotubes (cNTs) is measured. The mathematical models for calculating pore size distribution (PSD) are modified. The PSD of sample is determined using Horvath-Kawazoe (KH), Saito and Foley (SF) and Barrett-Joyner- Halenda (BJH) methods. An average potential function has been determined inside the slit-like and cylindrical pores. Since all of the regions of cNTs have same type that adsorbed nitrogen in the same conditions, the calculated PSDs from HK, SF and BJH models have same trend in both interior and exterior surfaces. By adding the adsorption term on outer surface, HK, SF and BJH models have been developed hence the pore volume increased.

关键词： single-wall carbon nanotubes mesoporous materials porosity adsorption nitrogen mesopore dimension micropore dimension single walled carbon nanotubes Horvath-Kawazoe method adsorption isotherm mathematical models pore size distribution Barrett-Joyner-Halenda equations slit-like pores cylindrical pores adsorbed nitrogen Saito and Foley method pore volume c N2

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产学研合作催生出5G智慧刺明珠葡萄酒庄园

丝路纵横

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丝路纵横 2024年第5期8卷 198-198页

作者：朱璇不详

一直以来,在北方广泛种植的欧亚美等葡萄酿酒品种,在南方往往受多雨潮湿的种植气候条件影响而无法种植,致使南方虽有广阔的葡萄酒消费市场,却无法酿造出具有南方特色和典型性强的葡萄酒。而春秋酒庄所在的福建省属于高温高湿的亚热带气... 详细信息

一直以来,在北方广泛种植的欧亚美等葡萄酿酒品种,在南方往往受多雨潮湿的种植气候条件影响而无法种植,致使南方虽有广阔的葡萄酒消费市场,却无法酿造出具有南方特色和典型性强的葡萄酒。而春秋酒庄所在的福建省属于高温高湿的亚热带气候,受品种特性、酿造菌种等因素制约,难以发展成规模且优质的葡萄酒。

关键词： c

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激光重熔纳米Sic对Fe基Ni/Wc喷涂涂层表面摩擦学性能影响

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润滑与密封 2018年第8期43卷 98-103页

作者：杜辉辉赵运才江西理工大学机电工程学院江西赣州341000

探究激光重熔纳米Si c对Fe基Ni/Wc金属陶瓷涂层摩擦学性能的影响。利用火焰喷涂设备在45#钢基体表面制备Fe基Ni/Wc金属陶瓷涂层,并对涂层进行未添加和添加纳米Si c的激光重熔处理。利用EDS、XRD、SEM等测试手段分别测定涂层微区组织成... 详细信息

探究激光重熔纳米Si c对Fe基Ni/Wc金属陶瓷涂层摩擦学性能的影响。利用火焰喷涂设备在45#钢基体表面制备Fe基Ni/Wc金属陶瓷涂层,并对涂层进行未添加和添加纳米Si c的激光重熔处理。利用EDS、XRD、SEM等测试手段分别测定涂层微区组织成分、物相结构和显微组织;利用摩擦磨损试验机在常温干摩擦条件下测试涂层摩擦磨损性能。结果表明:激光重熔处理基本消除涂层内部缺陷,而Si c纳米粒子的加入使重熔层晶粒尺寸进一步细化,提高了重熔层塑性变形的能力;火焰喷涂试样、无纳米粒子激光重熔和有纳米粒子激光重熔试样的平均摩擦因数分别为0.77、0.59和0.54;无纳米粒子激光重熔和有纳米粒子激光重熔试样的磨损率分别是重熔前的35.2%和22.2%;重熔前后磨损形式由黏着磨损向磨粒磨损过渡,且添加纳米的涂层磨损程度最小;添加纳米粒子的激光重熔试样的硬质相颗粒镶嵌在软质基体中,起到强韧结合的作用,使得重熔层表面耐磨性的进一步提高。

关键词：激光重熔火焰喷涂纳米Si c 耐磨性

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A VEDA simulation on cement paste: using dynamic atomic force microscopy to characterize cellulose nanocrystal distribution

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MRS cOMMUNIcATIONS 2017年第3期7卷 672-676页

作者： cao, Yizheng Verian, Kho Pin lbany Mol Res Inc SSCI W Lafayette IN 47906 USA Solidia Technol Piscataway NJ 08854 USA

cellulose nanocrystal (cNc) enhances mechanical performance of cement composites via short-circuit diffusion (ScD). cNcs transport water along their hydrophilic surface into the unhydrated cement cores to induce extra hydration. It is important to characterize cNc distribution because it determines the ScD pathways. This study for the first time, employs virtual environment dynamic atomic force microscopy, an atomic force microscopy computational tool to investigate cNc distribution in both fresh and hardened cement pastes. The methods not only provide insights in a static context (hardened sample), but also offer opportunities to evaluate the interaction of cNcs with calcium-silicate-hydrate growth during the kinetic early ages of hydration.

关键词： omega real-time frequency omega(d) driving frequency omega(n) natural frequency omega(0) resonant frequency of the oscillator in vacuum rho density eta viscosity K constant for a given cantilever p(1) p(2) q(1) q(2) q(3) q(4) fitting coefficients c cNc concentration

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Flexible capacitive pressure sensor based on multi-walled carbon nanotube electrodes

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MIcRO & NANO LETTERS 2017年第1期12卷 45-48页

作者： Shao, Na Wu, Jian Yang, Xing Yao, Jialin Shi, Yunsheng Zhou, Zhaoying Nanchang Hangkong Univ Sch Informat Engn Nanchang 330063 Jiangxi Peoples R China Tsinghua Univ Dept Precis Instruments Beijing 100084 Peoples R China Tsinghua Univ State Key Lab Precis Measurement Technol & Instru Beijing 100084 Peoples R China Nanchang Hangkong Univ Sch Aeronaut Mfg Engn Nanchang 330063 Jiangxi Peoples R China Mech Engn Coll Dept Elect & Optic Engn Hebei 050003 Peoples R China

Flexible pressure sensors offer the advantages of flexibility, low cost, and easy to large area fabrication, and they have wide applications in many fields. This work proposes a flexible capacitive pressure sensor that exhibits a sandwich-like structure, a good performance, and a simple process. Multi-walled carbon nanotube (MWNT) is used to fabricate the two electrodes of the sensor because this low cost material possesses good mechanical and electronic properties. Meanwhile, MWNT naturally forms numerous micro-nano structures that can enhance the sensitivity of a sensor. In addition, the dielectric layer of the sensor composed of parylene c (poly(chloro-p-xylylene)) is sandwiched between the two electrodes. The experimental results show that the pressure sensor demonstrates high sensitivity and a rapid response. The average sensitivity is 1.33 kPa (1) at a pressure that ranges from 0 to 758 Pa and the response time reach to millisecond level. Given that low cost, good property and simple process, the sensor has wide application prospects in electronic skins, health monitoring devices, and other wearable electronic products.

关键词： capacitive sensors capacitance measurement pressure sensors pressure measurement multi-wall carbon nanotubes nanosensors electrodes microsensors dielectric materials c pressure 0 Pa to 758 Pa wearable electronic product health monitoring device electronic skin poly(chloro-p-xylylene) parylene c dielectric layer micronano structure electronic property mechanical property MWNT sandwich-like structure multiwalled carbon nanotube electrode flexible capacitive pressure sensor

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corrigendum to Biochem. Eng. J., 17 (2004) 91–97 by Y.O. Shin, E. Rodil and J.H. Vera

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Biochemical Engineering Journal 2018年 134卷 57-59页

作者： Grazyna Wilczek-Vera Younok Dumortier Shin Eva Rodil Juan H. Vera McGill University Dept. Chemical Engineering 3610 University Street Montreal H3A 2B2 Canada

The errors in equations presented on figures in the original publication were corrected.

关键词： chymotrypsin Ribonuclease A AOT cytochrome c Hemoglobin Lysozyme

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comparative analysis of iterative reconstruction algorithms with resolution recovery and time of flight modeling for ¹⁸F-FDG cardiac PET: A multicenter phantom study (vol 24, pg 1036, 2017)

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JOURNAL OF NUcLEAR cARDIOLOGY 2017年第3期24卷 1101-1101页

作者： Matheoud, Roberta Lecchi, Michela Lizio, Domenico Scabbio, camilla Marcassa, claudio Leva, Lucia del Sole, Angelo Rodella, carlo Indovina, Luca Bracco, christian Brambilla, Marco Zoccarato, Orazio Univ Hosp Dept Med Phys Novara Italy Univ Hosp Dept Nucl Med Novara Italy Univ Milan Dept Hlth Sci Milan Italy San Paolo Hosp Nucl Med Unit Milan Italy IRCCS Unit Nucl Med S Maugeri Fdn Veruno Italy IRCCS Dept Cardiol S Maugeri Fdn Veruno Italy Spedali Civili Hosp Hlth Phys Unit Brescia Italy Polyclin Agostino Gemelli Dept Med Phys Rome Italy Inst Canc Res & Treatment Med Phys Dept Candiolo Italy

The purpose of this study was to evaluate the image quality in cardiac 18F-FDG PET using the time of flight (TOF) and/or point spread function (PSF) modeling in the iterative reconstruction (IR). Three scanners and an anthropomorphic cardiac phantom with an insert simulating a transmural defect (TD) were used. Two sets of scans (with/without TD) were acquired, and four reconstruction schemes were considered: (1) IR; (2) IR + PSF, (3) IR + TOF, and (4) IR + TOF + PSF. LV wall thickness (FWHM), contrast between LV wall and inner chamber (c Ic), and TD contrast in LV wall (c TD) were evaluated. Tests of the reconstruction protocols showed a decrease in FWHM from IR (13 mm) to IR + PSF (11 mm); an increase in the c Ic from IR (65%) to IR + PSF (71%) and from IR + TOF (72%) to IR + TOF + PSF (77%); and an increase in the c TD from IR + PSF (72%) to IR + TOF (75%) and to IR + TOF + PSF (77%). Tests of the scanner/software combinations showed a decrease in FWHM from Gemini_TF (13 mm) to Biograph_mcT (12 mm) and to Discovery_690 (11 mm); an increase in the c Ic from Gemini_TF (65%) to Biograph_mcT (73%) and to Discovery_690 (75%); and an increase in the c TD from Gemini_TF/Biograph_mcT (72%) to Discovery_690 (77%). The introduction of TOF and PSF increases image quality in cardiac 18F-FDG PET. The scanner/software combinations exhibit different performances, which should be taken into consideration when making cross comparisons.

关键词： PET cardiac reconstruction algorithms point spread function time of flight IR Iterative reconstruction TOF Time of flight RM Resolution modeling PSF Point spread function TD Transmural defect FWHM Full width at half maximum LV Left ventricle ROI Region of interest c Ic Percent contrast between LV wall and inner cavity c TD Percent TD contrast in LV wall

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Variability of the prion protein gene (PRNP) in Algerian dromedary populations

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Animal Gene 2020年 17-18卷

作者： Zoubeyda, Kaouadji Imane, Meghelli Youcef, cherifi Baaissa, Babelhadj Suheil, Gaouar S.B. Michela, conte Antonio, capocefalo Umberto, Agrimi Barbara, chiappini Gabriele, Vaccari Laboratory of physiopathology and biochemistry of nutrition (PpBioNut) University Abu BekrBelkaid Tlemcen 13.000 Algeria Laboratory of genetic molecular and cellular USTOMB Oran 31.000 Algeria Ecole normale supérieure de Ouargla Algeria Laboratory of ecosystems protection in arid and semi-arid zones University of Kasdi Merbah Ouargla 30000 Algeria Department of Food Safety Nutrition and Veterinary Public Health Istituto Superiore di Sanità Rome 00161 Italy

Prion diseases are a group of animal and human neurodegenerative, albeit transmissible diseases. The lack of effective preventive and therapeutic approaches represents a serious problem in their management. This is especially true for those prion diseases of animals which behave like infectious and contagious diseases. In the case of sheep scrapie, the well- known role of variations in the prion protein gene (PRNP) in conferring resistance/susceptibility represents an opportunity which has been exploited to select populations genetically resistant to the disease. The recent description of camel prion disease (cPrD) in Algeria and Tunisia and the suspicion falling into the category of infectious prion diseases, make urgent to investigate the possible existence of genetic determinants useful for its control. Herein, we investigated PRNP variability in 232 animals from six dromedary populations (Azawad, Hybrid, Naili, Rguibi, Sahraoui, Targui) in Algeria. A Gly69Ser mutation was observed in a single animal of the Targui population and a Gly134Glu polymorphism in the Azawad, Hybrid and Rguibi populations, with a frequency of the 134Glu allele of 2.6%, 7.7% and 7.1%, respectively. Although our work highlights a low variability of Algerian dromedary PRNP, as a possible indication of a recent evolutionary history of cPrD, it offers also evidence of PRNP variants whose role in prion disease resistance/susceptibility deserve to be deepened. © 2020 Elsevier Inc.

关键词： AZD Azawad population BSE Bovine Spongiform Encephalopathy cPrD camel Prion Desease cWD chronic Wasting Disease HBR Hybrid population NAL Naili population PRNP Prion protein PrP c Normal cellular prion protein PrP Sc The infectious isoform of the prion protein RGB Rguibi population SHR Sahraoui population TRG Targui population TSE Transmissible Spongiform Encephalopathy

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Hepatic Amiodarone Lipotoxicity Is Ameliorated by Genetic and Pharmacological Inhibition of Endoplasmatic Reticulum Stress

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TOXIcOLOGIcAL ScIENcES 2017年第2期159卷 402-412页

作者： Erez, Noam Hubel, Einav Avraham, Roy cohen, Raya Fishman, Sigal Bantel, Heike Manns, Michael Tirosh, Boaz Zvibel, Isabel Shibolet, Oren Tel Aviv Univ Sackler Fac Med Tel Aviv Sourasky Med Ctr Gastroenterol Inst Israel Fax 972-3-6966286 Tel Aviv Israel Tel Aviv Univ Sackler Fac Med Tel Aviv Israel Hannover Med Sch Dept Gastroenterol Hepatol & Endocrinol Hannover Germany Hebrew Univ Jerusalem Fac Med Sch Pharm Inst Drug Res Jerusalem Israel

Amiodarone is a commonly used antiarrhythmic drug and can cause liver steatosis. We investigated the role of endoplasmic reticulum (ER) stress/unfolded protein response in the pathogenesis of amiodarone-induced steatosis. Amiodarone-induced liver injury was obtained by 1 intraperitoneal injection to wild-type (WT) or c/EBP homologous protein knock-out mice (Ddit3(-/-)). Amiodarone directly reduced intracellular ATP and ca2+ in hepatocytes invitro, inducing ER stress and lipid accumulation. In vivo, amiodarone-driven liver damage and lipid accumulation was accompanied by activation of ER stress/unfolded protein response, as demonstrated by up-regulation of genes encoding key ER stress mediators and by phosphorylation of eIF2 alpha. In contrast to WT mice, Ddit3(-/-) mice were protected from amiodarone-induced ER stress and lipid accumulation. Importantly, amiodarone-induced lipid accumulation was not mediated by de novo hepatic lipogenesis, increased adipose tissue lipolysis or increased hepatic uptake of triglycerides or free fatty acids. Rather, amiodarone strongly increased hepatic mRNA expression of lipid droplet proteins, particularly cidea and cidec, in WT, but less so in Ddit3(-/-) mice, suggesting a link between ER stress and increased triglyceride storage. Moreover, while insulin attenuated amiodarone-induced phosphorylation of hormone sensitive lipase (HSL) in WT, it did not affect pHSL in Ddit3(-/-), indicating increased lipolysis and therefore reduced lipid accumulation in these mice. Finally, ER stress attenuation using 2 different pharmacological chaperones reduced lipid accumulation, accompanied by reduced mRNA expression of cidec. In conclusion, amiodarone-induced ER stress drives liver steatosis and may be considered for therapeutic targeting.

关键词： amiodarone ER stress hepatic steatosis c EBP homologous protein

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Biostimulant activity of humic-like substances from agro-industrial waste on chlorella vulgaris and Scenedesmus quadricauda

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EUROPEAN JOURNAL OF PHYcOLOGY 2018年第3期53卷 433-442页

作者： Puglisi, Ivana Barone, Valeria Sidella, Sarah coppa, Mauro Broccanello, chiara Gennari, Mara Baglieri, Andrea Univ Catania Dipartimento Agr Alimentaz & Ambiente Di3A Via S Sofia 98 I-95123 Catania Italy Univ Turin Dept Agr Forest & Food Sci DISAFA Largo P Braccini 2 I-10095 Turin Italy Univ Padua Dipartimento Agron Anim Alimenti Risorse Nat & Am Via Univ 16 I-35020 Padua Italy

The use of microalgae in a number of sectors, including biodiesel, feed and food production, is proving to be of great interest. An evaluation was made of the possible biostimulant effects on chlorella vulgaris and Scenedesmus quadricauda of humic-like substances (HLs) extracted from agro-industrial wastes. These included digestate from the waste of an agro-livestock farm (D-HL), oil extraction residues from rape (B-HL, Brassica napus L.) and tomato residues (T-HL). The microalgal growth medium (BG11) was supplemented with HLs to evaluate their effect on biomass yield as well as carbohydrate, chlorophylls a and b, lipid and fatty acid contents. Our results showed that the HLs used in the test are effective biostimulants of c. vulgaris and S. quadricauda. The biostimulant effect seems to depend on the type of extract used for cultivating the microalgae, the concentration and the species treated. Among the extracts applied to the growth medium, D-HL and T-HL seem to have a significant effect on microalgal biomass and lipid production. Although B-HL showed no significant effect on the biomass and lipid content of c. vulgaris and S. quadricauda, its presence in the growth medium increased the saturated:unsaturated fatty acid ratio (SFA/UFA) and stimulated the sugar metabolism of the microalgae by increasing their carbohydrate and chlorophyll content.

关键词： agroindustrial wastes biostimulants c vulgaris humic-like substances microalgae S quadricauda

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