Site Preference of Alloying Elements in DO22-Ni3V Phase: Phase-Field and First-Principles Study

Ding-Ni Zhang,Qian-Qian Shangguan,Fu Liu,Ming-Yi Zhang 대한금속·재료학회 2015 METALS AND MATERIALS International Vol.21 No.4

Site preference of alloying elements in DO22-Ni3V phase was investigated using phase-field and first-principles method. The concentrations of alloying elements on sublattices of DO22-Ni3V phase were quantitatively studied using phase-field model based on microscopic diffusion equations. The phase-field computation results demonstrate that the concentration differences of alloying elements on the NiI and NiII site are attributed to the coordination environment difference. Host atoms Ni and substitutional ternary additions Al prefer to occupy NiI site. Antisite atoms V show site preference on the NiII site. Further reason of site preference of alloying elements on the two different Ni sites were studied using first-principles method to calculate the electronic structure of DO22-Ni3V phase. Calculation of density of states, orbitals population and charge population of the optimized Ni3V structure found that the electronic structures of NiI and NiII sites are different. Electronic structure difference, which is caused by coordination environment difference, is the essential reason for site selectivity behaviors of alloying elements on NiI and NiII sites.

Effects of inulin diet supplementation on production performance, gut traits, and incidence of ascites in Haidong chicks under hypoxic conditions

Ding Baoan,Chen Lingyun,Lin Hao,Wang Xiezhong,Zhang Licheng,Ni Xiaoming,Pirone Andrea,Madigosky Stephen R.,Fronte Baldassare 아세아·태평양축산학회 2021 Animal Bioscience Vol.34 No.3

Objective: Effects of inulin supplementation in diet of Haidong chicks under hypoxic conditions on production performance, intestinal morphologic change, microflora contents and the incidence of ascites were studied. Methods: Commercial male chicks (360) were randomly divided into 6 groups and were fed diets supplemented with 0, 0.05, 0.075, 0.1, 0.125, and 0.15 g/kg of inulin, respectively. Results: The body weight gain and feed intake were improved in chicks fed the diets supplemented with 0.1 and 0.125 g/kg of inulin, from d 1 to d 42 (p<0.05); moreover, blood parameters were positively affected when inulin was included in the diets and the thickness of the intestinal wall and muscle tissue in duodenum, jejunum, and ileum tended to increase (p<0.05), and the villi height and crypt depth in duodenum, jejunum, and ileum (p<0.05). Regarding the number of goblet cells in duodenum, jejunum and ileum tended to increase when chicks were fed the diets supplemented with 0.075, 0.1, 0.125, and 0.15 g/kg (p<0.05) of inulin. When chicks were fed diets supplemented with 0.75 or 0.1 g/kg of inulin, a significant reduction of Escherichia coli counts in the cecum was observed; for a contrary, a significant increment of Bifidobacterium and Lactobacillus was observed in cecum and ileum. Finally, supplementing the feed with inulin determined an overall reduction of ascites incidences in comparison to the control group. Conclusion: Thus, the results observed in the present study clearly suggest that the diet supplementation with a quantity of inulin ranging between 0.1 and 0.125 g/kg, can improve growth performances, intestinal morphology, internal microbial balance and ascites incidence, in broiler chicks raised at high altitude area. Even though these findings may be of interest for the poultry industry, they may particularly be relevant in those areas characterized by high altitude such as Northwest China regions. Objective: Effects of inulin supplementation in diet of Haidong chicks under hypoxic conditions on production performance, intestinal morphologic change, microflora contents and the incidence of ascites were studied.Methods: Commercial male chicks (360) were randomly divided into 6 groups and were fed diets supplemented with 0, 0.05, 0.075, 0.1, 0.125, and 0.15 g/kg of inulin, respectively.Results: The body weight gain and feed intake were improved in chicks fed the diets supplemented with 0.1 and 0.125 g/kg of inulin, from d 1 to d 42 (p<0.05); moreover, blood parameters were positively affected when inulin was included in the diets and the thickness of the intestinal wall and muscle tissue in duodenum, jejunum, and ileum tended to increase (p<0.05), and the villi height and crypt depth in duodenum, jejunum, and ileum (p<0.05). Regarding the number of goblet cells in duodenum, jejunum and ileum tended to increase when chicks were fed the diets supplemented with 0.075, 0.1, 0.125, and 0.15 g/kg (p<0.05) of inulin. When chicks were fed diets supplemented with 0.75 or 0.1 g/kg of inulin, a significant reduction of <i>Escherichia coli</i> counts in the cecum was observed; for a contrary, a significant increment of <i>Bifidobacterium</i> and <i>Lactobacillus</i> was observed in cecum and ileum. Finally, supplementing the feed with inulin determined an overall reduction of ascites incidences in comparison to the control group.Conclusion: Thus, the results observed in the present study clearly suggest that the diet supplementation with a quantity of inulin ranging between 0.1 and 0.125 g/kg, can improve growth performances, intestinal morphology, internal microbial balance and ascites incidence, in broiler chicks raised at high altitude area. Even though these findings may be of interest for the poultry industry, they may particularly be relevant in those areas characterized by high altitude such as Northwest China regions.

Constraints on crust-mantle transition zone with Pn waveforms: A case study of eastern China and southern Korean Peninsula

Ding, Shiban,Ni, Sidao,Kim, YoungHee,He, Xiaohui Elsevier 2019 Physics of the earth and planetary interiors Vol.289 No.-

<P><B>Abstract</B></P> <P>The seismic velocity structure of the crust-mantle transition zone (CMTZ) provides key constraints on crustal dynamics, and can be studied with Pn wave which propagates horizontally along the Moho discontinuity. In this study, we first explore an effect of velocity-gradient structures in the CMTZ through synthetic Pn waveforms, and demonstrate that the shape of Pn changes from step-like to pulse-like when the CMTZ becomes from sharp to a gradient velocity structure, respectively. We then use Pn waveforms of the regional earthquakes (the July 2012 Mw 4.8 earthquake in east China and the September 2016 Mw 5.1 earthquake in South Korea) to examine the CMTZ structures to the west and east of the Yellow Sea and thus to constrain tectonic affinity between the eastern China and southern Korean Peninsula. The Pn waveforms from the Mw 4.8 event in east China show that the Moho in southern Yangtze Craton is sharp whereas there may be a gradient structure in CMTZ with a 6–10 km thickness in northern Yangtze Craton. The Pn waveforms from the Mw 5.1 event in South Korea show that the CMTZ in South Korea is also sharp, similar to the southern Yangtze Craton. Observed difference in CMTZ structures suggest that Sulu Orogenic Belt may extend along the north of the Gyeonggi Massif in Korea.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Pn waveforms are sensitive to the gradients of crust-mantle transition zone (CMTZ). </LI> <LI> Southern Korea features sharp Moho while eastern China Moho shows variability. </LI> </UL> </P>

Hydrophobic modification of silica/exfoliated graphite nanoplatelets aerogel and its application as supporting material for form-stable phase change materials

Ni Tan,Yang Feng,Ping Hu,QiLin Ding,Chuan-Huang Lin,Yu-Hao Ning,Hao-Nan Zhou,Linping Yu,Zhong Cao,Ju-Lan Zeng 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.99 No.-

Hydrophobic modified silica/exfoliated graphite nanoplatelets aerogel (M-SiO2/xGnP) were successfullyprepared via surface modification of silica/xGnP alcogel and followed by ambient pressure drying. Afterwards, form-stable PCMs in which capric–palmitic acids eutectic (CA–PA) was confined in theprepared aerogels were obtained by vacuum infiltration. Characterization of the prepared form-stablePCMs revealed that both the hydrophobic modification and the doping of xGnP could effectively improvethe loading of CA–PA in the aerogel. The unmodified silica aerogel could not adsorb CA–PA, while theloading of CA–PA in the surface modified pure silica aerogel supported form-stable PCM and theunmodified silica/xGnP aerogel supported form-stable PCM were 24.2 wt% and 44.4 wt%, respectively. Besides, the hydrophobic modification and the doping of xGnP showed significant synergistic effect. Theloading of CA–PA in the M-SiO2/xGnP supported form-stable PCM (FPCM/xGnP-20-48) could attain78.9 wt% when the M-SiO2/xGnP was obtained by modifying the alcogel with 20 vol% trimethylchlorosilane for 48 h. The FPCM/xGnP-20-48 not only had high latent heat and good thermal reliability,but also exhibited significantly improved thermal conductivity and alleviated supercooling due to theeffective thermal conductive network formed by xGnP and the promoted heterogeneous nucleation ofCA–PA at interfaces with aerogel.

Postmenopausal Hormone Therapy is Associated with in Situ Breast Cancer Risk

Ni, Xiao-Jian,Xia, Tian-Song,Zhao, Ying-Chun,Ma, Jing-Jing,Zhao, Jie,Liu, Xiao-An,Ding, Qiang,Zha, Xiao-Ming,Wang, Shui Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.8

Background: The relationship between postmenopausal hormone therapy (HT) and invasive breast cancer has been extensively investigated, but that with breast carcinoma in situ (BCIS) has received relatively little attention. The aim of our present study was to review and summarize the evidence provided by longitudinal studies on the association between postmenopausal HT use and BCIS risk. Methods: A comprehensive literature search for articles published up to May 2012 was performed. Prior to performing a meta-analysis, the studies were evaluated for publication bias and heterogeneity. Relative risk (RR) or odds ratio (OR) values were calculated using 14 reports (8 case-control studies and 6 cohort studies), published between 1986 and 2012. Results: There was evidence of an association between ever postmenopausal estrogen use and BCIS based on a random-effects model (RR = 1.25, 95% confidence interval (CI) = 1.01, 1.55). However, we found no strong evidence of an association between ever postmenopausal estrogen combined with progesterone use and BCIS using a randomeffects model (RR = 1.55, 95% CI = 0.95, 2.51). Furthermore, our analysis showed a strong association between "> 5 years duration" of estrogen or estrogen combined with progesterone use and BCIS. Furthermore, current use of any HT is associated with increased risk of BCIS in cohort studies. Additional well-designed large studies are now required to validate this association in different populations.

Principle and Design of a Novel Lorenz Force Type Bearingless Motor with Single-Axis Actively Regulated Capability

Ding Qiang,Deng Zhiquan,Wang Xiaolin,Wu Guyu,Ni Tuocheng 대한전기학회 2016 Journal of Electrical Engineering & Technology Vol.11 No.5

This paper proposes a novel Lorenz-force-type bearingless motor with single-axis actively positioned functionality. The novel motor consists of two slotless surface-mounted permanent magnet(SPM) motors, which have six skewed coils for each motor to constitute 3-phase windings and are in tandem along axial direction so as to achieve actively regulated axial motion. Additionally, two repulsive permanent magnet bearings (RPMBs) are used to passively stabilize radial- and tilting movements of the rotor. The slotless stator iron is employed for arrangement of the skewed coils in toroidal form. Compared with state-of-the-art single-axis actively controlled bearingless motors utilizing field weakening or strengthening effect of d-axis current to regulate axial movement, perhaps suffering irreversible demagnetization of permanent magnets especially at the time of start-up, the merit of this proposed motor is beneficial to prevent the demagnetization risk of permanent magnets. To verify the novel concept, firstly, theoretical analysis is carried out for modeling back electromagnetic force (back-EMF), axial force, drive torque. Followed by the analytical model, a detailed design process by integration of analytical method and finite element analysis (FEA) for the structural parameters are revealed. At last, 3-D FEA is performed to validate the correctness of analytical model, design process as well as to evaluate the performance of proposed motor.

Iso-propanol assisted preparation of individualized functional palygorskite fibers and its impact on improving dispersion abilities in polymer nanocomposites

Lingli Ni,Pengyin Zhang,Jing Chen,Jinglong Jiang,Shijie Ding 한국화학공학회 2017 Korean Journal of Chemical Engineering Vol.34 No.6

Palygorskite (PAL) as a natural one-dimensional nanomaterial has attracted tremendous attention as reinforcement agent in polymer nanocomposites. But its intrinsic existing form of aggregates or bundles and hydrophilic properties, highly requires an eco-efficient and environmentally benign approach for both of the disaggregation and organo-modification of PAL. We report a facile and effective process to achieve individualized organo-modified PAL fibers. It was carried out through surface modification reactions in the form of PAL iso-propanol gels with various alkyl and functional silanes. In contrast to the modifications in highly toxic solvent of toluene, reactions in iso-propanol make it possible to modify the surface of individual PAL fibers to obtain isolated organo-modified PAL fibers. With such a relatively green procedure, even higher amount of organic substituent has been grafted on to the surface of PAL fibers. Consequently, excellent dispersion of modified PAL nanofibers in acrylate polymer coatings was achieved, which exhibits outstanding corrosion protection properties.

Coordinated Hospital-Home Fecal Microbiota Transplantation via Percutaneous Endoscopic Cecostomy for Recurrent Steroid-Dependent Ulcerative Colitis

( Xiaodong Ni ),( Shengxian Fan ),( Yongliang Zhang ),( Zhiming Wang ),( Lan Ding ),( Yousheng Li ),( Jieshou Li ) 대한소화기학회 2016 Gut and Liver Vol.10 No.6

Since its introduction as an alternative intestinal microbiota alteration approach, fecal microbiota transplantation (FMT) has been increasingly used as a treatment of choice for patients with ulcerative colitis (UC), but no reports exist regarding FMT via percutaneous endoscopic cecostomy (PEC). This report describes the case of a 24-year-old man with a 7-year history of recurrent, steroid-dependent UC. He received FMT via PEC once per day for 1 month in the hospital. After the remission of gastrointestinal symptoms, he was discharged from the hospital and continued FMT via PEC twice per week for 3 months at home. The frequency of stools decreased, and the characteristics of stools improved soon thereafter. Enteral nutrition was regained after 1 week, and an oral diet was begun 1 month later. Two months after the FMT end point, the patient resumed a normal diet, with formed soft stools once per day. The follow-up colonoscopy showed normal mucus membranes; then, the PEC set was removed. On the subsequent 12 months follow-up, the patient resumed orthobiosis without any gastrointestinal discomfort and returned to work. This case emphasizes that FMT via PEC can not only induce remission but also shorten the duration of hospitalization and reduce the medical costs; therefore, this approach should be considered an alternative option for patients with UC. (Gut Liver 2016;10:975-980)

Principle and Design of a Novel Lorenz Force Type Bearingless Motor with Single-Axis Actively Regulated Capability

Qiang, Ding,Zhiquan, Deng,Xiaolin, Wang,Guyu, Wu,Tuocheng, Ni The Korean Institute of Electrical Engineers 2016 Journal of Electrical Engineering & Technology Vol.11 No.5

Associations of hypoxia inducible factor-1a gene polymorphisms with susceptibility to digestive tract cancers: a case–control study and meta-analysis

Zhi-Hai Ni,Xian-Jun Liang,Jing-Gang Mo,Yi Zhang,Jian-Hua Liang,Yu-Sha Yang,Yong Zhou,Zhao-Hua Li,Jian-Liang Zhang,Yin-Lu Ding,Peng Zhang,Jin-Qing Wang 한국유전학회 2015 Genes & Genomics Vol.37 No.11

We aim to investigate the correlations of hypoxia inducible factor-1a (HIF-1a) C1772T (rs11549465) and G1790A (rs11549467) gene polymorphisms with digestive tract cancers. A sum of 267 digestive tract cancers patients were hospitalized in Taizhou Central Hospital of Zhejiang Province as case group between December 2012 and December 2014. Additionally, 275 healthy people who had a physical examination in our hospital at the same time were selected as control group. Polymerase chain reaction-restriction fragment length polymorphism was utilized for detecting allele and genotype frequency of different locus in case and control group. Meta-analysis was performed using Comprehensive Metaanalysis 2.0 (Biostat Inc., Englewood, New Jersey, USA). Our result showed statistical significance only exists in family history of cancer between case and control group (P\0.05). Both C1772T (rs11549465) and G1790A (rs11549467) polymorphisms showed positive correlations with an increasing risk of digestive tract cancers. The frequencies of TT genotype of C1772T (rs11549465) and GA, AA genotypes of G1790A (rs11549467) polymorphisms in case group were evidently higher compared with the controls (all P\0.05). Besides, the comparison of allele and dominant models of HIF-1a C1772T (rs11549465) and G1790A (rs11549467) between two groups showed a significant difference (all P\0.05). Meta-analysis results further confirmed that the onset risk of digestive tract cancers may be improved under allele and dominant models of HIF-1a C1772T (rs11549465) and G1790A (rs11549467) (all P\0.05). Single nucleotide polymorphisms of HIF-1a C1772T (rs11549465) and G1790A (rs11549467) may play a role in development of digestive tract cancers.