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Zhou Z.,ARC China | Ren X.,Key Laboratory Of Food Nutrition And Safety Ministry Of Educationtianjin University Of Science And Technologytianjinp ina | Jiang Y.,Key Laboratory Of Food Nutrition And Safety Ministry Of Educationtianjin University Of Science And Technologytianjinp ina | Zhang Q.,Key Laboratory Of Food Nutrition And Safety Ministry Of Educationtianjin University Of Science And Technologytianjinp ina | And 3 more authors.
Starch/Staerke | Year: 2016

Recent studies have revealed that diabetes mellitus caused gut bacterial dysbiosis, and intervention studies aiming to selectively alter the composition and metabolism of the gut microbiota are crucial next steps for investigating the links between the microbiome and diabetes. The sequences encompassing V1-3 16S rDNA hypervariable regions were PCR amplified from rat fecal samples fed with resistant starch (RS). In total, 13 different phyla and 107 different genus were obtained with a 3% distance cut off. The microbiota profile of normal rats was significantly different from that of rats in diabetic control and RS intervention group. The most prominent phyla were Firmicutes and Bacteroidetes in the three groups. The proportion of Proteobacteria was significantly higher in the rats of diabetic control compared to normal group, and RS intervention could inhibit the proliferation of Proteobacteria phyla, including a wide variety of pathogenic species, such as Escherichia-Shige, Klebsiella, and Pseudomona. At genus level, Lactobacillus in the diabetic control was significantly lower than that in the normal group, whereas the feeding of RS increased the amount of Lactobacillus. More importantly, the consumption of RS reduced the composition of Ruminococcus and increased S24-7 norank comparing with the diabetic control. This study might indicate that RS is an effective food ingredient for manipulating the gut microbiota. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source


Wang Q.,Nanjing University of Aeronautics and Astronautics | Zhou F.,Nanjing University of Aeronautics and Astronautics | Zhou F.,Zhejiang University | Chen K.,Jiangsu University | And 2 more authors.
Thin Solid Films | Year: 2011

The TiCN coatings were deposited on WC cemented carbides using enhanced cathodic arc magnetron sputtering. The topography of TiCN coatings were observed using scanning electron microscopy (SEM), the composition and structure of TiCN coatings were analyzed by energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The friction and wear properties of TiCN coatings sliding against SiC and steel balls in air and water were investigated using ball-on-disk tribometer. The results showed that the TiCN coatings had a strong (111) preferred orientation. The friction coefficient and the specific wear rates of the TiCN/SiC tribopairs in air were higher than those in water. When the TiCN coatings slid against SiC balls in water, the friction coefficient and the specific wear rates first decreased, and then increased with the normal load, but decreased linearly with the sliding velocity. The lowest friction coefficient of 0.171 was obtained at 3 N and 0.4 m/s, while the lowest specific wear rate of the TiCN coatings was 2.3 × 10- 6mm3/Nm at 6 N and 0.1 m/s. The TiCN coatings were worn out when the normal loads were higher than 6 N. When the TiCN coatings slid against the SUJ2 and SUS440C balls in water, the friction coefficient increased to 0.271 and 1.026 respectively. The EDS analysis showed that Fe and O elements existed on the wear track. This indicated that the tribochemical reaction occurred at the friction contact area. © 2011 Elsevier B.V. All rights reserved. Source


Courbet D.,Aix - Marseille University | Fourquet-Courbet M.-P.,Aix - Marseille University | Kazan R.,Aix - Marseille University | Intartaglia J.,ARC China
Journal of Computer-Mediated Communication | Year: 2014

Faced with an abundance of advertising messages, Internet users allocate only minimal cognitive resources to advertising. What are the effects of pop-up ads for a new brand viewed at low-level attention, and then measured when the Internet users have forgotten having seen them? In the theoretical context of processing fluency and implicit memory, the experiment (n = 398) studied the effects of repeated brief exposure to different types of content (words/image) in pop-up ads 7 days and 3 months after exposure. The results show the overall positive effects of the pop-ups, the superiority of the image over words for effects on attitude toward the brand and the purchase intentions; but the words produce more semantic effects than the image. © 2013 International Communication Association. Source


Wang Q.,Nanjing University of Aeronautics and Astronautics | Wang Q.,Chongqing University | Zhou F.,Nanjing University of Aeronautics and Astronautics | Zhou F.,Chongqing University | And 5 more authors.
Applied Surface Science | Year: 2011

CrN, TiCN and TiAlN coatings were deposited on WC cemented carbide disks using enhanced cathodic arc magnetron sputtering and their topographies and structures were observed and analyzed using scanning electron microscopy (SEM) and X-ray diffraction (XRD), respectively. The friction and wear properties of CrN, TiCN and TiAlN coatings sliding against SiC balls in water were investigated and compared synthetically using ball-on-disk tribometer. The results showed that the CrN/SiC tribopairs showed the lowest friction coefficient of 0.076, while the TiCN/SiC tribopairs displayed the highest friction coefficient of 0.264. For the CrN/SiC tribopairs the specific wear rate of CrN coatings was lowest while that of SiC balls became highest. But for the TiAlN(TiCN)/SiC tribopairs, the specific wear rate of TiAlN coatings was highest while that of SiC balls for the TiCN/SiC tribopairs became lowest. This indicated that the friction and wear behaviors of nitride coatings/SiC balls tribo-systems in water were more strongly influenced by the anti-oxidative ability of tribomaterials in water than by their mechanical properties. © 2011 Elsevier B.V. All rights reserved. Source


Yang Y.,Shandong Academy of Sciences | Wang Q.,Shandong Academy of Sciences | Wang Q.,ARC China | Xiu D.,Shandong Academy of Sciences | And 2 more authors.
Energy and Buildings | Year: 2013

A type of all-ceramic flat plate solar collector is introduced. These all-ceramic solar collectors are made from ordinary ceramic and V-Ti black ceramic. The solar absorptance of black ceramic coatings is in the range of 0.93-0.97. The all-ceramic solar collector is characterized by low cost, long lifetime, no attenuation of absorptance, and building integration. The word "integration" means not only that the solar elements are used as architectural elements in attractive, visible (or invisible), and not too costly ways, but also that the solar collectors should have the same lifetime with the building. They should replace other building elements or share roof materials with building roof. For example, they can act as balcony railings, or share the insulation layer. When the solar thermal collectors act as balcony railings, the thermal efficiency is about 471%. When solar collectors integrate with pitched building roofs, the thermal efficiency of all-ceramic solar system is more than 50%. © 2013 Elsevier B.V. All rights reserved. Source

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