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| 1 | Hydrophobic, mechanical, and tribological properties of fluorine incorporated hydrogenated fullerene-like carbon films显示文摘Fluorine-incorporated hydrogenated fullerene-like nanostructure amorphous carbon films(F-FLC)were synthesized by employing the direct current plasma enhanced chemical vapor deposition(dc-PECVD)technique using a mixture of methane(CH4),tetra-fluoromethane(CF4),and hydrogen(H2)as the working gases.The effect of the fluorine content on the bonding structure,surface roughness,hydrophobic,mechanical,and tribological properties of the films was systematically investigated using Fourier transform infrared spectroscopy(FTIR),X-ray photoelectron spectroscopy(XPS),Raman analysis,atomic force microscope(AFM),contact angle goniometer,nano-indenter,and reciprocating ball-on-disc tester,respectively.The fluorine content in the films increased from 0 to 2.1 at.%as the CF4 gas flow ratio increased from 0 to 3 sccm,and incorporated fluorine atoms existed in the form of C-FX(X=1,2,3)bonds in the film.The fullerene nanostructure embedded in the hydrogenated amorphous carbon films was confirmed by Raman analysis.The water contact angle was significantly increased because of fluorine doping,which indicates that the hydrophobicity of the carbon films could be adjusted to some extent by the fluorine doping.The hardness and elastic modulus of the films remained relatively high(22 GPa)as the fluorine content increased.Furthermore,the friction coefficient of the carbon films was significantly reduced and the wear resistance was enhanced by fluorine doping. | Li QIANG Bin ZHANG Kaixiong GAO Zhenbin GONG Junyan ZHANG | 2013 | Friction2013，1，4： | 6 |
| 2 | A 6.2–9.5 GHz receiver for Wimedia MB-OFDM and China UWB standard显示文摘An integrated 6.2–9.5 GHz UWB receiver for both WiMedia MB-OFDM and China UWB standard is proposed. The receiver can cover Group#3, Group#4 for WiMedia and Group#2–5 for China UWB standard respectively. The fully differential receiver consists of a wideband LNA and a down conversion mixer with high gain and low gain mode. A low-pass filter with controllable gain and cut-o? frequency along with a programmable gain amplifier are also included. The chip was fabricated in TSMC 0.13-μm RF CMOS process. Measurement results show that the receiver achieves voltage gain from 21 to 69 dB with 2 dB/step and an NF of 3.2–4.6 dB over 6.2–9.5 GHz and 1-dB compression point of ?21 dBm. The intermediate frequency of the receiver can be switched between 264 and 132 MHz, which enables the receiver applicable for both WiMedia and China UWB standard. Power consumption is only 47 mA with 1.2–V supply voltage. | GAO Ting ZHOU Feng LI Wei LAN Fei LINing REN JunYan | 2011 | Science China(Information Sciences)2011，54，2： | 4 |
| 3 | Plasmacytoid dendritic cell deficiency in neonates enhances allergic airway inflammation via reduced production of IFN-α显示文摘Allergic asthma,a chronic inflammatory airway disease associated with type 2 cytokines,often originates in early life.Immune responses at an early age exhibit a Th2 cell bias,but the precise mechanisms remain elusive.Plasmacytoid dendritic cells(pDCs),which play a regulatory role in allergic asthma,were shown to be deficient in neonatal mice.We report here that this pDC deficiency renders neonatal mice more susceptible to severe allergic airway inflammation than adult mice in an OVA-induced experimental asthma model.Adoptive transfer of pDCs or administration of IFN-αto neonatal mice prevented the development of allergic inflammation in wild type but not in IFNAR1−/−mice.Similarly,adult mice developed more severe allergic inflammation when pDCs were depleted.The protective effects of pDCs were mediated by the pDC-/IFN-α-mediated negative regulation of the secretion of epithelial cell-derived CCL20,GM-CSF,and IL-33,which in turn impaired the recruitment of cDC2 and ILC2 cells to the airway.In asthmatic patients,the percentage of pDCs and the level of IFN-αwere lower in children than in adults.These results indicate that impairment of pDC-epithelial cell crosstalk in neonates is a susceptibility factor for the development of allergeninduced allergic airway inflammation. | Min Wu Liuchuang Gao Miao He Hangyu Liu Han Jiang Ketai Shi Runshi Shang Bing Liu Shan Gao Hebin Chen Feili Gong Erwin WGelfand Yafei Huang Junyan Han | 2020 | Cellular & Molecular Immunology2020，17，5： | 3 |
| 4 | Investigation on the photo-induced de-oxygenation process of myoglobin in aqueous solution by use of fluorescence spectroscopy显示文摘A photo-induced de-oxygenation process of myoglobin (Mb) in aqueous solution was investigated by use of fluorescence spectroscopy. The spectra are characterized by the fluorescence intensity declining gradually after each scan,and the decay of fluorescence intensity being significant in each scan,which is assigned to the release of oxygen from the opening of the heme-pockets induced by illumination. More illumination will cause more release of oxygen; if the temperature of an Mb solution is increased when it is illuminated,the rate of de-oxygenation will be higher. It was found that ligand-oxygen in Fe-porphyrin could be removed from Mb by nitrogen. This indicates that the interac-tion between oxy-Mb and other different gases can be tested by the method of fluorescence spectros-copy. In addition,fluorescence spectroscopy can be employed to probe the energy transfer between Fe-porphyrin and tryptophan or tyrosine in Mb molecules. | MA JunYan ZHENG XueFang TANG Qian MA Jing GAO DaBin HU JiHan | 2008 | Science China Chemistry2008，51，5： | 2 |
| 5 | Recent developments in asphalt-aggregate separation technology for reclaimed asphalt pavement显示文摘Reclaimed asphalt pavement(RAP)has significant recycling value because it contains nonrenewable resources including asphalt and aggregate.However,thus far,only a small part of RAP materials can be used in the con-struction of recycled asphalt pavement,and the usage is regarded as a low-value utilization in the underlying layers.One of the most important reasons for this shortcoming is the problem of false particle size and pseudo gradation of RAP materials.Therefore,identifying suitable asphalt-aggregate separation technology is essential for improving the utilization of RAP materials in recycled asphalt mixture and enhancing the construction quality of recycled asphalt pavement.To address this,the paper performed a systematic review of asphalt-aggregate separation technologies for processing RAP materials and their prospects.Firstly,based on the composition of the asphalt mixture and the characteristics of RAP materials after aging,the key RAP separation technologies were proposed.Then,the concept,principle,and implementation methods of physical,chemical,and biological sep-aration methods of RAP materials were comprehensively analyzed.Moreover,the advantages and disadvantages of various separation technologies were discussed by comparing them with the related technologies in the petrochemical industry.The application prospects of various asphalt-aggregate separation methods for RAP materials can provide a reference for upgrading and expanding solid waste recycling technology for asphalt pavement. | Decheng Feng Jiwei Cao Libo Gao Junyan Yi | 2022 | Journal of Road Engineering2022，2，4： | 1 |
| 6 | Grain size effect in corrosion behavior of electrodeposited nanocrystalline Ni coatings in alkaline solution显示文摘 | Liping Wang Junyan Zhang Yan Gao | 2006 | Scripta Materialia2006，55，： | 1 |
| 7 | Alkaline fermentation of primary sludge for short-chain fatty acids accumulation and mechanism 显示文摘 | WU Haiyan GAO Junyan YANG Dianhai | 2010 | Chemical Engineering Journal2010，160，1： | 1 |
| 8 | Downregulation of SCAI enhances glioma cell invasion and stem cell like phenotype by activating Wnt/β-catenin signaling显示文摘 | Xiangrong Chen Weipeng Hu Baoyuan Xie Hongzhi Gao Chaoyang Xu Junyan Chen | 2014 | Biochemical and Biophysical Research Communications2014，，2： | 1 |
| 9 | Grain size effect in corrosion behavior of electrodeposited nanocrystalline Ni coat- ings in alkaline solution显示文摘 | Wang Liping Zhang Junyan Gao Yah | 2006 | Scripts Matefialia2006，55，： | 1 |
| 10 | STRICT STABILITY OF IMPULSIVE SET VALUED DIFFERENTIAL EQUATIONS显示文摘In this paper, we develop strict stability concepts of ODE to impulsive hybrid set valued differential equations. By Lyapunov’s original method, we get some basic strict stability criteria of impulsive hybrid set valued equations. | Junyan Bao , Caili Zhou (College of Math. and Computer Science, Hebei University, Baoding 071002, Hebei) Chunxia Gao (College of Electronic and Information Engineering, Hebei University, Baoding, 071002, Hebei) | 2011 | Annals of Differential Equations2011，27，2： | 1 |
| 11 | Groin size effect in corrosion behavior of electrodeposited nanocrystalline Ni Coatings in alkaline solution显示文摘 | Zhang Junyan Gao Yan | 2006 | Scripta Materiala2006，55，： | 1 |
| 12 | Molecular Motions in Polymer Matrix for Microenvironment Sensing显示文摘Polymer science entails the structural study at multi-levels from nano-to micro-and mesoscale,which is highly important to transfer or even amplify the molecular information to macroscopic materials.Multiple polymer structural transitions from lower-order to higher-order superstructures are normally involved to achieve selective,efficient and sophisticated functions.Therefore,in-situ visualization of these processes is highly important,not only for fundamental understanding the structural evolution,but also for the optimization of the process flow during the materials processing.Fluorescence imaging based on aggregation-induced emission(AIE)provides an ideal tool that offers a simple,accurate,and easy-readable method to fulfill the above requirements.Owing to the twisted propeller-like structure of AIE luminogens(AIEgens),they show high fluorescence sensitivity to the surrounding microenvironment(e.g.,viscosity,rigidity,and polarity)through intramolecular motions.In this short review,we summarize the recent applications of AIEgens to serve as“built-in”sensors to analyze the process of polymerization,microphase separation,glass/vitrification transition,polymer solvation,crystallization,etc.The perspective on the future application of AIE technology in polymer engineering,especially fiber materials,is also discussed. | GAO Mengyue CHENG Yanhua ZHANG Junyan XU Chengjian YU Xiaoxiao ZHU Meifang | 2021 | Chemical Research in Chinese Universities2021，37，1： | 0 |
| 13 | Macroscopic superlubricity of potassium hydroxide solution achieved by incorporating in-situ released graphene from friction pairs显示文摘Graphene(G),as a typical two-dimensional material,is often used as an additive for liquid lubricants.However,graphene is mostly added to liquid lubricants in a one-time manner in friction;it mainly exists in the form of multilayer agglomerated structures due to theπ–πstacking between graphene sheets,making it unable to fully exert the synergistic lubrication function.Herein,we propose a new macroscopic superlubric system of graphene/potassium hydroxide(G/KOH)solution;and the graphene additive involved is exfoliated in-situ from graphene/epoxy(G/EP)friction pair by friction,continuously providing freshly-peeled graphene into KOH solution and minimizing the adverse effects of graphene agglomeration.Moreover,the in-situ produced graphene additive has thinner thickness and better anti-aggregation ability,which provide more graphene to accommodate OH−,form more stacked sandwich structures of OH−/graphene/OH−between friction pairs(i.e.,equivalent to a moving pulley block with more wheels),and finally realize superlubricity.This study develops a new liquid superlubric system suitable for alkaline environments,and at the same time proposes a new way to gradually release graphene additives in situ,rather than adding them all at once,deepening the understanding to liquid superlubricity mechanism,and paving the experimental foundation for the practical application of macroscopic superlubricity. | Hongyu LIANG Xinjie CHEN Yongfeng BU Meijuan XU Gang ZHENG Kaixiong GAO Xijun HUA Yonghong FU Junyan ZHANG | 2023 | Friction2023，11，4： | 0 |
| 14 | Optimizing the tribological performance of DLC-coated NBR rubber:The role of hydrogen in films显示文摘Diamond-like carbon(DLC)films directly deposited on rubber substrate is undoubtedly one optimal option to improve the tribological properties due to its ultralow friction,high-hardness as well as good chemical compatibility with rubber.Investigating the relationship between film structure and tribological performance is vital for protecting rubber.In this study it was demonstrated that the etching effect induced by hydrogen incorporation played positive roles in reducing surface roughness of DLC films.In addition,the water contact angle(CA)of DLC-coated nitrile butadiene rubber(NBR)was sensitive to the surface energy and sp?carbon clustering of DLC films.Most importantly,the optimum tribological performance was obtained at the 29 at%H-containing DLC film coated on NBR,which mainly depended on the following key factors:(1)the DLC film with appropriate roughness matched the counterpart surface;(2)the contact area and surface energy controlled interface adhesive force;(3)the microstructure of DLC films impacted load-bearing capacity;and(4)the generation of graphitic phase acted as a solid lubricant.This understanding may draw inspiration for the fabrication of DLC films on rubber to achieve low friction coefficient. | Changning BAI Li QIANG Bin ZHANG Kaixiong GAO Junyan ZHANG | 2022 | Friction2022，10，6： | 0 |
| 15 | Fibrous Aerogels with Tunable Superwettability for High-Performance Solar-Driven Interfacial Evaporation显示文摘Solar-driven interfacial evaporation is an emerging technology for water desalination.Generally,double-layered structure with separate surface wettability properties is usually employed for evaporator construction.However,creating materials with tunable properties is a great challenge because the wettability of existing materials is usually monotonous.Herein,we report vinyltrimethoxysilane as a single molecular unit to hybrid with bacterial cellulose(BC)fibrous network,which can be built into robust aerogel with entirely distinct wettability through controlling assembly pathways.Siloxane groups or carbon atoms are exposed on the surface of BC nanofibers,resulting in either superhydrophilic or superhydrophobic aerogels.With this special property,single component-modified aerogels could be integrated into a double-layered evaporator for water desalination.Under 1 sun,our evaporator achieves high water evaporation rates of 1.91 and 4.20 kg m^(-2)h^(-1)under laboratory and outdoor solar conditions,respectively.Moreover,this aerogel evaporator shows unprecedented lightweight,structural robustness,long-term stability under extreme conditions,and excellent salt-resistance,highlighting the advantages in synthesis of aerogel materials from the single molecular unit. | Chengjian Xu Mengyue Gao Xiaoxiao Yu Junyan Zhang Yanhua Cheng Meifang Zhu | 2023 | Nano-Micro Letters2023，15，5： | 0 |
| 16 | Influence of spiral anchor composite foundation on seismic vulnerability of raw soil structure显示文摘A typical single-layer raw soil structure in villages and towns in China is taken as the research object.In the probabilistic seismic demand analysis,the seismic demand model is obtained by the incremental dynamic time history analysis method.The seismic vulnerability analysis is carried out for the raw soil structure of nonfoundation,strip foundation,and spiral anchor composite foundation,respectively.The spiral anchor composite foundation can reduce the seismic response and failure state of raw soil structure,and the performance level of the structure is significantly improved.Structural requirements sample data with the same ground motion intensity are analyzed by linear regression statistics.Compared with the probabilistic seismic demand model under various working conditions,the seismic demand increases gradually with the increase of intensity.The seismic vulnerability curve is summarized for comparative analysis.With the gradual deepening of the limit state,the reduction effect of spiral anchor composite foundation on the exceedance probability becomes more and more obvious,which can reduce the probability of structural failure to a certain extent. | Shiwei Hou Guangliang Gao Hao Zhang Zhanwen Lai Junyan Han | 2022 | Earthquake Research Advances2022，2，4： | 0 |
| 17 | CCDC189 affects sperm flagellum formation by interacting with CABCOC01显示文摘Multiple morphological abnormalities of the sperm flagella(MMAF)are one of the major causes of male infertility and are characterized by multiple defects.In this study,we found that the coiled-coil domain-containing 189(Ccdc189)gene was predominantly expressed in mouse testes and that inactivation of the Ccdc189 gene caused male infertility.Histological studies revealed that most sperm from Ccdc189-deficient mice carried coiled,curved or short flagell a,which are typical MMAF phenotypes.Immunoelectron microscopy showed that the CCDC189 protein was located at the radial spoke of the first peripheral microtubule doublet in the sperm axoneme.A CCDC189-interacting protein,CABCOCO1(ciliary-associated calcium-binding coiled-coil protein 1),was discovered via co-immunoprecipitation and mass spectrometry,and inactivation of Cabcocol caused malformation of sperm flagell a,which was consistent with findings obtained with Ccdc189-deficient mice.Further studies revealed that inactivation of CCDC189 caused downregulation of CABCOCO1 protein expression and that both CCDC189 and CABCOCO1 interacted with the radial-spoke-specific protein RSPH1 and intraflagellar transport proteins.This study demonstrated that Ccdc189 is a radial-spoke-associated protein and is involved in sperm flagellum formation through its interactions with CABCOCO1 and intraflagellar transport proteins. | Mengyue Wang Junyan Kang Zhiming Shen Yingchun Hu Min Chen Xiuhong Cui Hongbin Liu Fei Gao | 2023 | National Science Review2023，10，9： | 0 |
| 18 | Dock4 is required for the maintenance of cochlear hair cells and hearing function显示文摘Auditory hair cells(HCs)are the mechanosensory receptors of the cochlea,and HC loss or malfunction can result from genetic defects.Dock4,a member of the Dock180-related protein superfamily,is a guanine nucleotide exchange factor for Rac1,and previous reports have shown that Dock4 mutations are associated with autism spectrum disorder,myelodysplastic syndromes,and tumorigenesis.Here,we found that Dock4 is highly expressed in the cochlear HCs of mice.However,the role of Dock4 in the inner ear has not yet been investigated.Taking advantage of the piggyBac transposon system,Dock4 knockdown(KD)mice were established to explore the role of Dock4 in the cochlea.Compared to wild-type controls,Dock4 KD mice showed significant hearing impairment from postnatal day 60.Dock4 KD mice showed hair bundle deficits and increased oxidative stress,which eventually led to HC apoptosis,late-onset HC loss,and progressive hearing loss.Furthermore,molecular mechanism studies showed that Rac1/β-catenin signaling was significantly downregulated in Dock4 KD cochleae and that this was the cause for the disorganized stereocilia and increased oxidative stress in HCs.Overall,our work demonstrates that the Dock4/Rac1/β-catenin signaling pathway plays a critical role in the maintenance of auditory HCs and hearing function. | Guodong Hong Xiaolong Fu Jieyu Qi Buwei Shao Xuan Han Yuan Fang Shuang Liu Cheng Cheng Chengwen Zhu Junyan Gao Xia Gao Jie Chen Ming Xia Wei Xiong Renjie Chai | 2023 | Fundamental Research2023，3，4： | 0 |
| 19 | Disruption of the autism-related gene Pak1 causes stereocilia disorganization,hair cell loss,and deafness in mice显示文摘Several clinical studies have reported that hearing loss is correlated with autism in children.However,little is known about the underlying mechanism between hearing loss and autism.p21-activated kinases(PAKs)are a family of serine/threonine kinases that can be activated by multiple signaling molecules,particularly the Rho family of small GTPases.Previous studies have shown that Pak1 mutations are associated with autism.In the present study,we take advantage of Pak1 knockout(Pak1a/a)mice to investigate the role of PAK1 in hearing function.We find that PAK1 is highly expressed in the postnatal mouse cochlea and that PAK1 deficiency leads to hair cell(HC)apoptosis and severe hearing loss.Further investigation indicates that PAK1 deficiency downregulates the phosphorylation of cofilin and ezrin-radixin-moesin and the expression of b II-spectrin,which further decreases the HC synapse density in the basal turn of cochlea and disorganized the HC stereocilia in all three turns of cochlea in Pak1à/àmice.Overall,our work demonstrates that the autism-related gene Pak1 plays a crucial role in hearing function.As the first candidate gene linking autism and hearing loss,Pak1 may serve as a potential target for the clinical diagnosis of autism-related hearing loss. | Cheng Cheng Yilin Hou Zhonghong Zhang Yanfei Wang Ling Lu Liyan Zhang Pei Jiang Song Gao Qiaojun Fang Chengwen Zhu Junyan Gao Xufeng Liu Wei Xie Zhengping Jia Zhigang Xu Xia Gao Renjie Chai | 2021 | Journal of Genetics and Genomics2021，48，4： | 0 |
| 20 | Effects of dietary oil sources and fat extraction methods on apparent and standardized ileal digestibility of fat and fatty acids in growing pigs显示文摘Background:There is a lack of data for the standardized ileal digestibility(SID) of fat and fatty acids in national feed databases.In addition,it is important to specify the procedures used for fat analyses.Therefore,an experiment was conducted to 1) determine the apparent ileal digestibility(AID) and SID of fat and fatty acids in ten different oil sources for growing pigs and to develop prediction equations for SID of fat based on fatty acid composition;and 2) compare the effect of the fat extraction methods on the calculated values for endogenous loss and digestibility of fat.Methods:Twenty-two barrows(initial body weight:32.1 ± 2.3 kg) were surgically fitted with a T-cannula in the distal ileum,and allotted to 1 of 11 experimental diets in a 4-period Youden Square design.A fat-free diet was formulated using cornstarch,soy protein isolate and sucrose.Ten oil-added diets were formulated by adding 6% of dietary oil sources to the fat-free diet at the expense of cornstarch.All diets contained 26% sugar beet pulp and 0.40% chromic oxide.Results:The endogenous loss of ether extract(EE) was lower than that of acid-hydrolyzed fat(AEE;P < 0.01).There were significant differences in the AID and SID of fat and saturated fatty acids across the dietary oil sources(P < 0.05).The SID of AEE for palm oil was lower than that of sunflower oil,corn oil,canola oil,rice oil and flaxseed oil(P < 0.01).The AID and SID of fat ranged from 79.65% to 86.97% and from 91.14% to 99.18%.Although the AID of EE was greater than that of AEE(P < 0.01),there was no significant difference in SID of EE and AEE except for palm oil.The ratio of unsaturated to saturated fatty acids(U/S) had a positive correlation with SID of fat(P < 0.05),whereas C16:0 and long chain saturated fatty acids(LSFA) were significant negatively correlated with SID of fat(P < 0.01).The best-fit equation to predict SID of fat was SID AEE = 102.75-0.15 × LSFA-0.74 × C18:0-0.03 × C18:1(Adjusted coefficient of determination = 0.88,P < 0.01).Conclusions:When calculating the SID of fat,the EE content of the samples can be analyzed using the direct extraction method,whereas the acid hydrolysis procedure should be used to determine the AID of fat.Fat digestibility of dietary oils was affected by their fatty acid composition,especially by the contents of C16:0,LSFA and U/S. | Lu Wang Wenjun Gao Junyan Zhou Huangwei Shi Tenghao Wang Changhua Lai | 2023 | Journal of Animal Science and Biotechnology2023，14，2： | 0 |
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