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| 1 | Temporal variations and source apportionment of volatile organic compounds at an urban site in Shijiazhuang, China显示文摘Shijiazhuang,the city with the worst air quality in China,is suffering from severe ozone pollution in summer.As the key precursors of ozone generation,it is necessary to control the Volatile Organic Compounds(VOCs)pollution.To have a better understanding of the pollution status and source contribution,the concentrations of 117 ambient VOCs were analyzed from April to August 2018 in an urban site in Shijiazhuang.Results showed that the monthly average concentration of total VOCs was 66.27 ppbv,in which,the oxygenated VOCs(37.89%),alkanes(33.89%),and halogenated hydrocarbons(13.31%)were the main composite on.Eight major sources were identified using Positive Matrix Factorization modeling with an accurate VOCs emission inventory as inter-complementary methods revealed that the petrochemical industry(26.24%),other industrial sources(15.19%),and traffic source(12.24%)were the major sources for ambient VOCs in Shijiazhuang.The spatial distributions of major industrial activities emissions were identified by using geographic information statistics system,which illustrated the VOCs was mainly from the north and southeast of Shijiazhuang.The inverse trajectory analysis using Hybrid Single-Particle Lagrangian Integrated Trajectory(HYSPLIT)and Potential Source Contribution Function(PSCF)clearly demonstrated the features of pollutant transport to Shijiazhuang.These findings can provide references for local governments regarding control strategies to reduce VOCs emissions. | Yanan Guan Lei Wang Shujuan Wang Yihao Zhang Jieying Xiao Xiaoli Wang Erhong Duan Li'an Hou | 2020 | Journal of Environmental Sciences2020，32，11： | 19 |
| 2 | Evolution of secondary phase particles during deformation of Al-5Ti-1B master alloy and their effect on α-Al grain refinement显示文摘Addition of Al-5Ti-1B alloy to molten aluminum alloys can refine α-Al grains effectively and thereby improve their strength and toughness. TiAl_3 and TiB_2 in Al-5Ti-1B alloy are the main secondary-phase particles for refinement, while the understanding on the effect of their sizes on α-Al grain refinement continues to be fragmented. Therefore, Al-5Ti-1B alloys with various sizes and morphologies of the secondary-phase particles were prepared by equal channel angular pressing(ECAP). Evolution of the secondary-phase particles during ECAP process and their impact on α-Al grain refinement were studied by X-ray diffraction and scanning electron microscope(SEM). Results show that during the ECAP process, micro-cracks firstly appeared inside TiAl_3 particles and then gradually expanded, which resulted in continuous refinement of TiAl_3 particles. In addition, micro-distribution uniformity of TiB_2 particles was improved due to the impingement of TiAl_3 particles to TiB_2 clusters during deformation. Excessively large sizes of TiAl_3 particles would reduce the number of effective heterogeneous nucleus and thus resulted in poor grain refinement effectiveness. Moreover, excessively small TiAl_3 particles would reduce inhibitory factors for grain growth Q and weaken grain refinement effectiveness. Therefore, an optimal size range of 18-22 μm for TiAl_3 particles was suggested. | Hong Yu Ning Wang Renguo Guan Di Tie Zheng Li Yanan An Yang Zhang | 2018 | Journal of Materials Science & Technology2018，34，12： | 6 |
| 3 | Heavy mineral assemblage characteristics and the Cenozoic paleogeographic evolution in southwestern Qaidam Basin显示文摘Based on the analysis of heavy mineral assemblages in Cenozoic southwestern Qaidam Basin, we found that different areas have variable heavy mineral assemblage characteristics, which suggested that there were two source areas—the Altyn Mountains and the Qimen Tagh-East Kunlun Mountains. In Ganchaigou-Shizigou-Huatugou(Area A), which was mainly source from the Altyn Mountains, its heavy minerals were mainly composed of zircon, Ti-oxides, and wollastonite in the Paleoceneearly Eocene and mainly of unstable minerals, especially amphibole, in the middle Eocene-Oligene. Since the late OligoceneMiocene, the heavy minerals were still mainly unstable minerals, but the content of epidote increased and the content of amphibole decreased. In Qigequan-Hongliuquan(Area B), which was the mixed source from the Altyn Mountains and the Qimen Tagh-East Kunlun Mountains, its heavy minerals were mainly garnet, epidote, and amphibole. The source of LücaotanDongchaishan-Kunbei(Area C) was mainly from the Qimen Tagh-East Kunlun Mountains, heavy minerals in the sediments in Area C were mainly zircon and Ti-oxides in Paleogene and garnet, epidote, and amphibole in Neogene. In Yuejin-Youshashan(Area D), where the stable minerals and unstable minerals were present simultaneously, the heavy mineral assemblages was controlled by multi-direction source. The variation of heavy mineral assemblages in southwestern Qaidam Basin shows that Altyn Mountains was of low-lying topographic relief in Paleocene-early Eocene, and the rapid uplift of Altyn Mountains started from the middle Eocene. In Paleogene, the Altyn Tagh Fault had a slow strike-slip velocity, but the strike-slip velocity increased greatly since the late Oligocene, leading to a strike-slip displacement above 300 km since Neogene. Meanwhile, the Qimen Tagh-East Kunlun fault zone was under a stable tectonic stage in Paleogene with the Qimen Tagh Mountain being lowlying hills; since the late Oligocene, the fault zone started to activate and the Qimen Tagh Mountain began to uplift rapidly. | LI LinLin GUO ZhaoJie GUAN ShuWei ZHOU SuPing WANG MingZhen FANG YaNan ZHANG ChenChen | 2015 | Science China Earth Sciences2015，58，6： | 6 |
| 4 | Using ultrasound to improve the sequential post-synthesis modification method for making mesoporous Y zeolites显示文摘Mesoporous Y zeolites were prepared by the sequential chemical dealumination(using chelating agents such as ethylenediaminetetraacetic acid,H EDTA,and citric acid aqueous solutions)and alkaline desilication(using sodium hydroxide,NaOH,aqueous solutions)treatments.Specifically,the ultrasound-assisted alkaline treatment(i.e.,ultrasonic treatment)was proposed as the alternative to conventional alkaline treatments which are performed under hydrothermal conditions.In comparison with the hydrothermal alkaline treatment,the ultrasonic treatment showed the comparatively enhanced efficiency(with the reduced treatment time,i.e.,5 min vs.30 min,all with 0.2 mol·L NaOH at 65°C)in treating the dealuminated Y zeolites for creating mesoporosity.For example,after the treatment of a dealuminated zeolite Y(using 0.1 mol·L H EDTA at 100°C for 6 h),the ultrasonic treatment produced the mesoporous zeolite Y with the specific external surface area()of 160 m·g and mesopore volume()of 0.22 cm·g,being slightly higher than that by the conventional method(i.e.,=128 m·g and=0.19 cm·g).The acidic property and catalytic activity(in catalytic cracking of-octane)of mesoporous Y zeolites obtained by the two methods were comparable.The ultrasonic desilication treatment was found to be generic,also being effective to treat the dealuminated Y zeolites by citric acid.Additionally,the first step of chemical dealumination treatment was crucial to enable the effective creation of mesopores in the parent Y zeolite(with a silicon-to-aluminium ratio,Si/Al=2.6)regardless of the subsequent alkaline desilication treatment(i.e.,ultrasonic or hydrothermal).Therefore,appropriate selection of the condition of the chemical dealumination treatment based on the property of parent zeolites,such as Si/Al ratio and crystallinity,is important for making mesoporous zeolites effectively. | Rongxin Zhang Peinan Zhong Hamidreza Arandivan Yanan Guan Jinmin Liu Na Wang Yilai Jiao Xiaolei Fan | 2020 | Frontiers of Chemical Science and Engineering2020，14，2： | 5 |
| 5 | Regulation of flowering time in chrysanthemum by the R2R3 MYB transcription factor CmMYB2 is associated with changes in gibberellin metabolism显示文摘The switch from vegetative growth to reproductive growth is a key event in the development of a plant.Here,the product of the chrysanthemum gene CmMYB2,an R2R3 MYB transcription factor that is localized in the nucleus,was shown to be a component of the switching mechanism.Plants engineered to overexpress CmMYB2 flowered earlier than did wild-type plants,while those in which CmMYB2 was suppressed flowered later.In both the overexpression and RNAi knockdown plants,a number of genes encoding proteins involved in gibberellin synthesis or signaling,as well as in the response to photoperiod,were transcribed at a level that differed from that in the wild type.Both yeast two-hybrid and bimolecular fluorescence complementation assays revealed that CmMYB2 interacts with CmBBX24,a zinc-finger transcription factor known to regulate flowering by its influence on gibberellin synthesis. | Lu Zhu Yunxiao Guan Yanan Liu Zhaohe Zhang Muhammad Abuzar Jaffar Aiping Song Sumei Chen Jiafu Jiang Fadi Chen | 2020 | Horticulture Research2020，7，1： | 5 |
| 6 | KEY TECHNIQUE TO COMPOSITELY SUPPORTING THE ROADWAY DRIVEN ALONG PREVIOUS GOAF WITH BOLTS, BARS AND CHAIN MESHES UNDER COMPLEX CONDITIONS显示文摘Large cross sectional roadways driven along the previous goaf are always in fragmental surrounding rocks, and remarkably deform under the influence of mining disturbance. It can successfully be supported by the composite bolt-bar-chain mesh support. However, success can only be achieved by getting hold of the key techniques as follows: rationally determining the size of the goaf-side rib, adopting bolts with extendible rod, determining rational parameters and strengthening the integral structure of the supporting system. These have proved effective and profitable by the practice at Dongpang colliery, Xingtai Coal Mining Administration, Hebei province,and are now in application | HOU Chaojiong HE Yanan ZHANG Yidong GUAN Xuemao (China University of Mining & Technology Xuzhou, Jiangsu, P.R.China) | 1995 | Journal of Coal Science & Engineering(China)1995，1，1： | 4 |
| 7 | Structured hierarchical Mn–Co mixed oxides supported on silicalite-1 foam catalyst for catalytic combustion显示文摘Silicalite-1(S1)foam was functionalized by supporting manganese-cobalt(Mn-Co)mixed oxides to develop the structured hierarchical catalyst(Mn-Co@SlF)for catalytic combustion for the first time.The self-supporting S1 foam with hierarchical porosity was prepared via hydrothermal synthesis with polyurethane(PU)foam as the template.Subsequently,Mn-Co oxide nano sheets were uniformly grown on the surface of S1 foams under hydrothermal conditions to prepare the structured hierarchical catalyst with specific surface area of 354 m^2·g^-1,micropore volume of 0.141 cm^3·g^-1 and total pore volume of 0.217 cm3·g^-1,as well as a good capacity to adsorb toluene(1.7 mmol·g^-1 at p/p0=0.99).Comparative catalytic combustion of toluene of over developed structured catalyst Mn-Co@SlF was performed against the control catalysts of bulk Mn-Co@S1(i.e.,the crushed Mn-Co@SlF)and unsupported Mn-Co oxides(i.e.,Mn-Co).Mn-Co@SlF exhibited comparatively the best catalytic performance,that is,complete and stable toluene conversion at 2480 C over 65 h due to the synergy between Mn-Co oxides and S1 foam,which provided a large number of oxygen vacancies,high redox capacity.In addition,the hierarchical porous structure also improved the accessibility of active sites and facilitated the global mass transfer across the catalyst bed,being beneficial to the catalysis and catalyst longevity. | Yanan Guan Hengyu Shen Xing Guo Boyang Mao Zhenyuan Yang Yangtao Zhou He Liang Xiaolei Fan Yilai Jiao jinsong Zhang | 2020 | Chinese Journal of Chemical Engineering2020，28，9： | 3 |
| 8 | The over-expression of a chrysanthemum gene encoding an RNA polymerase II CTD phosphatase-like 1 enzyme enhances tolerance to heat stress显示文摘The enzyme RNAPII CTD phosphatase-like 1 is known as a transcriptional regulator of the plant response to various abiotic stresses.Here,the isolation of CmCPL1,a chrysanthemum(Chrysanthemum morifolium)gene encoding this enzyme is described.Its predicted 955 residue gene product includes the FCPH catalytic domain,two double-stranded RNA binding motifs,and a nuclear localization signal.A sub-cellular localization assay confirmed that CmCPL1 was expressed in the nucleus.CmCPL1 transcription was shown to be significantly inducible by heat stress.The over-expression and knockdown of CmCPL1,respectively,increased and diminished the tolerance of chrysanthemum to heat stress,which maybe dependent on the regulation of CmCPL1 and on the expression of downstream heat stress-responsive genes. | Yuying Qi Yanan Liu Zixin Zhang Jiaojiao Gao Zhiyong Guan Weimin Fang Sumei Chen Fadi Chen Jiafu Jiang | 2018 | Horticulture Research2018，5，1： | 2 |
| 9 | Gelatin methacrylate hydrogel scaffold carrying resveratrol-loaded solid lipid nanoparticles for enhancement of osteogenic differentiation of BMSCs and effective bone regeneration显示文摘Critical-sized bone defects caused by traumatic fractures,tumour resection and congenital malformation are unlikely to heal spontaneously.Bone tissue engineering is a promising strategy aimed at developing in vitro replacements for bone transplantation and overcoming the limitations of natural bone grafts.In this study,we developed an innovative bone engineering scaffold based on gelatin methacrylate(GelMA)hydrogel,obtained via a two-step procedure:first,solid lipid nanoparticles(SLNs)were loaded with resveratrol(Res),a drug that can promote osteogenic differentiation and bone formation;these particles were then encapsulated at different concentrations(0.01%,0.02%,0.04%and 0.08%)in GelMA to obtain the final Res-SLNs/GelMA scaffolds.The effects of these scaffolds on osteogenic differentiation of bone marrow mesenchymal stem cells(BMSCs)and bone regeneration in rat cranial defects were evaluated using various characterization assays.Our in vitro and in vivo investigations demonstrated that the different Res-SLNs/GelMA scaffolds improved the osteogenic differentiation of BMSCs,with the ideally slow and steady release of Res;the optimal scaffold was 0.02 Res-SLNs/GelMA.Therefore,the 0.02 Res-SLNs/GelMA hydrogel is an appropriate release system for Res with good biocompatibility,osteoconduction and osteoinduction,thereby showing potential for application in bone tissue engineering. | Bangguo Wei Wenrui Wang Xiangyu Liu Chenxi Xu Yanan Wang Ziqi Wang Jinnuo Xu Jianzhong Guan Pinghui Zhou Yingji Mao | 2021 | Regenerative Biomaterials2021，8，5： | 2 |
| 10 | Preparation and properties of Gd^3+ and Y^3+ co-doped ceria-based electro-lyres for intermediate temperature solid oxide fuel cells 显示文摘 | Guan Xiangfeng Zhou Heping Wang Yanan | 2008 | Journal of Alloys and Compounds2008，464，12： | 1 |
| 11 | Career adaptability, job search self-efficacy and outcomes: A three-wave investigation among Chinese university graduates显示文摘 | Yanjun Guan Hong Deng Jiaqing Sun Yanan Wang Zijun Cai Lihui Ye Ruchunyi Fu Yang Wang Shu Zhang Yuhui Li | 2013 | Journal of Vocational Behavior2013，，3： | 1 |
| 12 | When do salary and job level predict career satisfaction and turnover intention among Chinese managers? The role of perceived organizational career management and career anchor显示文摘 | Yanjun Guan Yueran Wen Sylvia Xiaohua Chen Haiyang Liu Wei Si Yuhan Liu Yanan Wang Ruchunyi Fu Yuyan Zhang Zhilin Dong | 2014 | European Journal of Work and Organizational Psychology2014，，4： | 1 |
| 13 | Preparation and properties of Gd^3+ and Y^3+ co-doped ceda-based electrolytes for intermediate temperature solid oxide fuel cells显示文摘 | GUAN Xiangfeng ZHOU Heping WANG Yanan | 2008 | Journal of Alloys and Compounds2008，464，12： | 1 |
| 14 | Additive manufacturing of sodalite monolith for continuous heavy metal removal from water sources显示文摘Herein,we present a simple strategy for preparing monolithic sodalite adsorbents via sequential additive manufacturing and post-treatments.In detail,the method includes(i)3D printing of cylindrical monoliths using clay as the base material;(ii)thermal activation of the 3D-printed clay monoliths by calcination(to produce reactive alumina and silica species and enable mechanical stabilization);(iii)conversion of the activated clay monoliths to hierarchical porous sodalite monoliths via hydrothermal alkaline treatment.Parametric studies on the effect of calcination temperature,alkaline concentration and hydrothermal treatment time on the property of the resulting materials(such as phase composition and morphology)at different stages of preparation was conducted.Under the optimal conditions(i.e.,calcination temperature of 850℃,NaOH concentration of 3.3 mol·L^(-1),reaction temperature of 150℃,and reaction time of 6 h),a high-quality pure sodalite monolith was obtained,which possesses a relatively high BET surface area(58 m^(2)·g^(-1))and hierarchically micro-meso-macroporous structure.In the proposed application of continuous removal of heavy metals(chromium ion as the model)from wastewater,the developed 3D-printed sodalite monolith showed excellent Cr^(3+)removal performance and fast kinetics(~98%removal efficiency within 25 cycles),which outperformed the packed bed using sodalite pellets(made by extrusion). | Hengyu Shen Run Zou Yangtao Zhou Xing Guo Yanan Guan Duo Na Jinsong Zhang Xiaolei Fan Yilai Jiao | 2022 | Chinese Journal of Chemical Engineering2022，35，2： | 1 |
| 15 | Protective effect of brain and muscle arnt-like protein-1 against ethanol-induced ferroptosis by activating Nrf2 in mice liver and HepG2 cells显示文摘Alcohol abuse has recently become a serious health concern worldwide,and the incidence of alcoholic liver disease(ALD)is rapidly increasing with high morbidity and mortality.Ferroptosis is a newly recognized form of regulated cell death caused by the iron-dependent accumulation of lipid peroxidation.Here we showed that the circadian clock protein brain and muscle arnt-like protein-1(BMAL1)in hepatocytes is both necessary and sufficient to protect against ALD by mitigating ferroptosis.U pon exposure to alcohol(5%Lieber-DeCarli liquid alcohol diet for 10 days before binged alcohol with 5 g/kg body weight in vivo,300 mmol/L for 12 h in vitro,respectively),the content of iron,reactive oxygen species(ROS)and malondialdehyde(MDA)was boosted signifi cantly while glutathione(GSH)was decreased that mainly based on the downregulated protein expression of ferritin heavy chain(FTH),ferroportin(FPN),heme oxygenase1(HO-1)and anti-cystine/glutamate antiporter(SLC7A11),while these changes could be abolished by ferroptosis inhibitor Ferrostatin-1[Fer-1(5 mg/kg body weight for 10 days in vivo,10μmol/L for 2 h in vitro,respectively)].Further study indicated that the alcohol could activate the protein expression of BMAL1 which exerts a protective effect against ferroptosis through promoting nuclear factor erythroid 2-related factor 2(Nrf2)translocation into nuclear and subsequently stimulating its downstream proteins FTH,FPN,glutathione peroxidase 4 activity(GPX4),HO-1,SLC7A11,while knockdown of BMAL1 and Nrf2 by RNA interference further downregulated the expression of these protein and thus promoting ferroptosis in response to alcohol.Collectively,our results unveiled that the protective action of BMAL1 during alcohol challenge depends on its ability to activate Nrf2-ARE antiferroptosis pathway and targeting hepatic BMAL1 to dampen hepatic ferroptosis signaling may have therapeutic potential for ALD. | Yanan Zhao Ranran Zhang Ziheng Chen Ziyi Wang Shuang Guan Jing Lu | 2023 | Food Science and Human Wellness2023，12，6： | 0 |
| 16 | Variable Learning-Memory Behavior fromπ-Conjugated Ligand to Ligand-Containing Cobalt(II)Complex显示文摘In the information-explosion era,developing novel algorithms and memristive devices has become a promising concept for next-generation capacity enlargement technology.Organic small molecule-based devices displaying superior learning-memory performance have attracted much attention,except for the existence of poor heat-resilience and mediocre conductivity.In this paper,a strategy of transforming an organic-type data-storage material to metal complex is proposed to resolve these intrinsic issues.A pristine NDI-derivative(NIPy)and its corresponding Co(II)complex(CoNIPy)are synthesized for the purpose of electrical property investigation.CoNIPy complex-based memristive device exhibits superior ternary WORM memory performance compared with the binary behavior of NIPy,including>104 s of reading,lower threshold voltage(V_(th)),1:10^(2):10^(5)of OFF/ON1/ON2 current ratio,and long-term stability in heating environment.The variable learning-memory behavior can be attributed to the enhanced ligand-to-metal charge transfer(LMCT)and improved redox activity after the introduction of central metal atom and coordination bond.These studies on material innovation and optimal performance are of great importance not only for environmentally-robust memristive devices but also for practical application of a host of organic electronic devices. | Cheng Zhang Mohan Chen Guan Wang Ming Teng Songtao Ling Yanan Wang Zhaojun Su Kun Gao Xinbo Yang Chunlan Ma Yang Li Qichun Zhang | 2022 | Chinese Journal of Chemistry2022，40，19： | 0 |
| 17 | Molecular mechanism and promising treatments of chronic prostatitis/chronic pelvic pain syndrome:An exploratory bibliometric analysis and literature review of preclinical studies显示文摘Background:As one of the most common diseases in urology,a large number of preclinical studies have been accumulated to explore the etiological mechanism and potential intervention of chronic prostatitis/chronic pelvic pain syndrome(CP/CPPS).Methods:In this study,we systematically evaluated the current status of preclinical research on CP/CPPS through bibliometrics analysis using VOSviewer and Citespace.Characteristics of publication such as year,country/region,institution,author,journal,citation,and keywords were analyzed.Based on the bibliometrics analysis results of keywords,we summarized the possible mechanisms and promising treatments for CP/CPPS narratively.Results:According to the results of this study,the most common mechanisms involved in CP/CPPS were as follows:Disturbed immune and inflammation mediators,immune cell dysfunction,oxidative stress,dysregulated signaling pathways,apoptosis,gut microbiota,and testosterone metabolism.Traditional Chinese Medicine and extracorporeal shock wave therapy have important potential in the treatment of CP/CPPS.Conclusion:Further translational studies targeting the above mechanisms and validating the objective efficacy of potential treatments indicated by preclinical studies in clinical patients are needed in the future. | Yongfeng Lao Xin Guan Jian Wang Yanan Bai Zewen Li Zhiping Wang Zhilong Dong | 2023 | UroPrecision2023，1，4： | 0 |
| 18 | Haplotype variation and KASP markers for SiPSY1-A key gene controlling yellow kernel pigmentation in foxtail millet显示文摘Carotenoid biosynthesis and accumulation are important in determining nutritional and commercial value of crop products.Yellow pigmentation of mature kernels caused by carotenoids is considered a vital quality trait in foxtail millet,an ancient and widely cultivated cereal crop across the world.Genomic regions associated with yellow pigment content(YPC),lutein and zeaxanthin in foxtail millet grains were identified by genome-wide association analysis(GWAS),and SiPSY1(Phytoene synthase 1 which regulates formation of the 40-carbon backbone of carotenoids)was confirmed as the main contributor to all three components by knockout and overexpression analysis.SiPSY1 was expressed in seedlings,leaves,panicles,and mature seeds,and was subcellularly localized to chloroplasts.Transcription of SiPSY1 in 15 DAP immature grains was responsible for YPC in mature seeds.Selection of SiPSY1 combined with increased YPC in mature grains during domestication of foxtail millet was confirmed.Haplotype analysis suggested that expression level of SiPSY1 could be a selection target for future breeding programs,and a KASP marker was developed for selection of favorable SiPSY1 alleles in breeding.The results of this work will benefit nutritional and commercial improvement of foxtail millet varieties,as well as other cereal crops. | Rongjun Zuo Yanyan Zhang Yanbing Yang Chunfang Wang Hui Zhi Linlin Zhang Sha Tang Yanan Guan Shunguo Li Ruhong Cheng Zhonglin Shang Guanqing Jia Xianmin Diao | 2023 | The Crop Journal2023，11，6： | 0 |
| 19 | Facile synthesis of metal-organic frameworks embedded in interconnected macroporous polymer as a dual acid-base bifunctional catalyst for efficient conversion of cellulose to 5-hydroxymethylfurfural显示文摘5-Hydroxymethylfurfural(5-HMF),as a key platform compound for the conversion of biomass to various biomass-derived chemicals and biofuels,has been attracted extensive attention.In this research,using Pickering high internal phase emulsions(Pickering HIPEs)as template and functional metal-organic frameworks(MOFs,UiO-66-SO;H and UiO-66-NH;)/Tween 85 as co-stabilizers to synthesis the dual acid-base bifunctional macroporous polymer catalyst by one-pot process,which has excellent catalytic activity in the cascade reaction of converting cellulose to 5-HMF.The effects of the emulsion parameters including the amount of surfactant(ranging from 0.5%to 2.0%(mass)),the internal phase volume fraction(ranging from 75%to 90%)and the acid/base Pickering particles mass ratio(ranging from 0:6 to 6:0)on the morphology and catalytic performance of solid catalyst were systematically researched.The results of catalytic experiments suggested that the connected large pore size of catalyst can effectively improve the cellulose conversion,and the synergistic effect of acid and base active sites can effectively improve the 5-HMF yield.The highest 5-HMF yield,about 40.5%,can be obtained by using polymer/MOFs composite as catalyst(Poly-P12,the pore size of(53.3±11.3)μm,the acid density of 1.99 mmol·g^(-1)and the base density of 1.13 mol·g^(-1))under the optimal reaction conditions(130℃,3 h).Herein,the polymer/MOFs composite with open-cell structure was prepared by the Pickering HIPEs templating method,which provided a favorable experimental basis and theoretical reference for achieving efficient production of high addedvalue product from abundant biomass. | Yanan Wei Yunlei Zhang Bing Li Wen Guan Changhao Yan Xin Li Yongsheng Yan | 2022 | Chinese Journal of Chemical Engineering2022，35，4： | 0 |
| 20 | Analysis of Nitrogen Metabolism Related Enzymes and Related Physiological Indexes of Main Foxtail Millet Varieties Developed in North China显示文摘[Objectives] This study was conducted to clarify the evolution characteristics of foxtail millet varieties in different ages and provide a basis for the breeding of new varieties. [Methods] A field experiment was carried out on 20 main foxtail millet varieties promoted in North China developed from the 1980 s to 2000 s. The physiological and biochemical indexes of different foxtail millet varieties in four ages were compared, including chlorophyll content, soluble protein content, glutamine synthetase(GS) activity and glutamate synthase(GOGAT) activity, and the correlation between enzyme activity and yield was analyzed. [Results] The chlorophyll SPAD values of the flag leaf and functional leaves of foxtail millet varieties decreased with the filling process. The SPAD values of the flag leaf, top second leaf and top third leaf were higher in the varieties developed in the 1990 s and 2000 s than those in the 1980 s and 2010 s. The activity of glutamine synthetase(GS) and glutamate synthase(GOGAT) showed a single-peak curve in different foxtail millet varieties developed in the recent 30 years, and the peaks of the two were at 7 d and at 7 or 14 d, respectively. The activity of GS and GOGAT increased with the breeding age. In the period from 7 d after anthesis to the mature period, the decreases in the soluble protein content followed an order of 2010 s, 2000 s, 1990 s and 1980 s from small to large, indicating that the degradation rate of various enzyme sources and metabolic regulators in foxtail millet plants decreased during the improvement process. At 35 d after anthesis, the correlation coefficient between GS activity and yield was-0.247, that is, there was a negative correlation with yield. And there was a significant positive correlation between GOGAT activity and yield, and the correlation coefficient was as high as 0.455 at 7 d after anthesis. [Conclusions] Changes in the GS activity, GOGAT activity and soluble protein content in the flag leaf of foxtail millet varieties developed in recent years have a certain impact on yield. | Qinghua KONG Erying CHEN Shuting YU Yanbing YANG Ling QIN Feifei LI Yanan GUAN | 2019 | Agricultural Biotechnology2019，8，6： | 0 |
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