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Inverse Leaf Aging Sequence (ILAS) and Its Significance of Wheat

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Agricultural Sciences in China 2011年第2期10卷 207-219页

作者： Zhang Song-wu Wang chang-fa Yao You-hua Reseach Laboratory of Low-Temperature Plants College of SciencesNorthwest A＆F UniversityYangling 712100P.R.China

The implication of the revelation of the inverse leaf aging sequence（ILAS） of wheat needs to be probed in theory and *** 2005,the comparison experiment of the ILAS and the conventional leaf aging sequence（CLAS） has been carried out to measure the canopy temperature and some important biological parameters of *** nature,there existed the phenomenon that the wheat leaves aged in an sequence opposite to the conventional sequence and some of the leaves of ILAS wheat aged sequentially differed from those of CLAS wheat,i.e.,the penultimate leaves rather than the flag leaves aged last among the leaves at different leaf positions;in correspondence with the inverse leaf aging sequence,there appeared an unconventional leaf color structure at the late fruiting stage,which had yellow upper leaves and green lower leaves,opposite to the conventional leaf color structure that had green upper leaves and yellow lower leaves;the chlorophyll concentrations,soluble protein concentrations,transpiration rates,and net photosynthetic rates of the penultimate leaves of ILAS wheat unconventionally surpassed those of their flag leaves as their growth moved forward from one stage to another stage,and the ILAS wheat characteristically presented cold canopy temperature,i.e.,a cold tail canopy temperature at the late fruiting stage,or a cold canopy temperature at the whole fruiting stage;because ILAS wheat was unique in physiological process,its kernel weights were obviously higher than those of CLAS wheat,which closely related to the ＂relay＂ kernel-filling mode,which was different from the kernel-filling mode of CLAS wheat under which the flag leaves act as the main nutrient supply source at the whole fruiting *** study provided a new idea and approach for the theoretical exploration on wheat fruiting and aging,wheat yield further improvement,and cold type wheat and cold tail wheat breeding.

关键词： wheat inverse leaf aging sequence canopy temperature biological parameters

Research Status Quo and Future of Low Temperature Wheat Genotypes

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Agricultural Sciences in China 2008年第12期7卷 1413-1422页

作者： ZHANG Song-wu WANG chang-fa Research Laboratory of Low-Temperature Plants College of Sciences Northwest A ＆ F University Yangling 712100 P.R.China

Low temperature wheat genotypes are a group of wheat with a slightly low canopy （plant） temperature, and the research on their biological characters and utilization in wheat breeding has been done at home and abroad for more than 20 years, and has made great progress. The research contents and advances include the following respects： Wheat genotypes with slightly low canopy temperature have been verified to exist in nature; these wheat genotypes, which present cold temperature, are superior to conventional wheat materials in some important biological characters and particularly prominently in metabolic function and cellular structure; when they suffer stresses such as drought, high temperature and overcast and rainy weather, they still retain their superiority in some of their important biological characters and therefore have a wide range of ecological adaptability; slightly low canopy temperatures of these genotypes are closely correlated with low temperatures of their second heat sources and their vigorous plants; since their low canopy temperatures can be inherited, they can exert favorable influence on the temperatures of their offspring while crossing with other wheat materials, and in particular, the discovery of cold-source wheat as a contributor to low temperature, has further formed good conditions for breeding high and stable quality low temperature wheat varieties with a high and stable yield. Thus, low temperature wheat genotypes are of great research importance and have great prospects.

关键词： wheat low temperature genotype research advance future

Yttria-stabilized-zirconia hollow spheres prepared by atmospheric plasma spray

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Particuology 2014年第3期12卷 57-62页

作者： Xiaofeng Zhang Kesong Zhou fa chang Chen Song Chunming Deng Siyuan Liang School of Materials Science and Engineering South China University of Technology Institute of New Materials Guangzhou Research Institute of Non-ferrous Metals School of Public Health Shandong University

Yttria-stabilized-zirconia （YSZ） hollow spheres are widely utilized for their novel physical and chemical properties. However, developing a simple and low-cost method for preparing such hollow spheres still remains a great challenge. In this paper, an atmospheric plasma spray （APS） method is introduced, and the formation mechanism of hollow 7YSZ （ZrO2-7wt%Y2O3） spheres is presented. The hollow sphere morphology was observed by scanning electron microscopy （SEM） when agglomerated and sintered 7YSZ powders were used. Additionally, additive composition changes, phase transformations, and the thermal behavior of 7YSZ powders were analyzed by energy dispersive spectroscopy （EDS）, X-ray diffractometry （XRD）, thermogravimetric analysis （TG） and differential scanning calorimeter analysis （DSC）. Furthermore, the phase transformations of agglomerated and sintered 7YSZ powders, 7YSZ hollow spheres that annealed at various temperatures for different times are analyzed.

关键词： Yttria-stabilized-zircooia Atmospheric plasma spray Spheroidization Phase transformation

Romipeptides A and B, two new romidepsin derivatives isolated from Chromobacterium violaceum No.968 and their antitumor activities in vitro

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Chinese Journal of Natural Medicines 2019年第2期17卷 155-160页

作者： XIONG Lei CHEN chang-fa MIN Tao-Ling HU Hai-Feng State Key Lab of New Drug&Pharmaceutical Process Shanghai Institute of Pharmaceutical Industry China State Institute of Pharmaceutical Industry

Romipeptides A and B(1 and 2),two new romidepsin derivatives,and three known compounds,chromopeptide A(3),romidepsin(4)and valine-leucine dipeptide(5)were isolated from the fermentation broth of Chromobacterium violaceum *** structures were elucidated by interpretation of their UV,HR-ESI-MS and NMR *** absolute configuration of compound 1 and 2 were established by single crystal X-ray diffraction *** 1–5 were evaluated for their anti-proliferative activities against three human cancer cell lines,SW620,HL60,and *** results showed most of these compounds exhibited antitumor activities in vitro,in which compound 2 displayed potent cytotoxicity to SW620,HL60 and A549 cell lines,with IC_(50) of 12.5,6.7 and 5.7 nmol·L^(–1),respectively.

关键词： Chromobacterium violaceum Romidepsin derivatives Cytotoxicity

Preventing prolonged post-operative ileus in gastric cancer patients undergoing gastrectomy and intra-peritoneal chemotherapy

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World Journal of Gastroenterology 2005年第31期11卷 4776-4781页

作者： De-Chuan Chan Yao-Chi Liu Cheng-Jueng Chen Jyh-Cherng Yu Heng-Cheng Chu fa-chang Chen Teng-Wei Chen Huan-fa Hsieh Tzu-Ming chang Kuo-Liang Shen Division of General Surgery Tri-Service General Hospital National Defense Medical Center National Defense University Taipei Taiwan China Division of Gastroenterology and Hepatology Department of Internal Medicine Tri-Service General HospitalNational Defense Medical Center National Defense UniversityTaipei Taiwan China Department of Anesthesiology Tfi-Service General Hospital National Defense Medical Center National Defense University Taipei Taiwan China Yee-Zen General Hospital Taoyuan Taiwan China Department of Surgery Shalu Tungs' Memorial Hospital Tai-Chung Taiwan China

AIM： To assess the efficacy of metoclopramide （Met） for prevention of prolonged post-operative ileus in advanced gastric cancer patients undergoing D2 gastrectomy and intra-peritoneal chemotherapy （IPC）. METHODS： Thirty-two advanced gastric cancer patients undergoing D2 gastrectomy and IPC were allocated to two groups. Sixteen patients received Met immediately after operation （group A）, and 16 did not （group B）. Another 16 patients who underwent D2 gastrectomy without IPC were enrolled as the control group （group C）. All patients had received epidural pain control. The primary endpoints were time to first post-operative flatus and time until oral feeding with a soft diet without discomfort. Secondary endpoints were early complications during hospitalization. RESULTS： Gender, the type of resection, operating time, blood loss, tumor status and amount of narcotics were comparable in the three groups. However, the group C patients were older than those in groups A and B （67.5±17.7 vs 56.8±13.2, 57.5±11.7 years, P= 0.048）. First bowel flatus occurred after 4.35±0.93 d in group A, 4.94±1.37 d in group B, and 4.71±1.22 d in group C （P〉0.05）. Oral feeding of a sore diet was tolerated 7.21±1.92 d after operation in group A, 10.15±2.17 d in group B, and 7.53±1.35 d in group C （groups A and C vsgroup B, P〈0.05）. There was no significant difference in respect to the first flatus among the three groups. However, the time of tolerating oral intake with soft food in groups A and C patients was significantlyshorter than that in group B patients. Levels of C-reactive protein （CRP） were significantly lower in group C and there was a more prominent and prolonged response in CRP level in patients undergoing IPC. The incidence of post-operative complications was similar in the three groups except for prolonged post-operative ileus. There was no increased risk of anastomotic leakage in patients receiving Met. CONCLUSION： The results suggest that a combination of intravenous Met and epidu

关键词： Metoclopramide C-reactive protein Gastric cancer Intraperitoneal chemotherapy

Developmental changes of glutamate acid decarboxylase 67 in mouse brain after hypoxia ischemia

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Neuroscience Bulletin 2006年第1期22卷 47-51页

作者： fa-Lin XU chang-Lian ZHU Xiao-Yang WANG Department of Pediatrics the Third Affiliated Hospital of Zhengzhou University Zhengzhou 450052 China

Objective To study the developmental changes of glutamic acid decarboxylase-67 （ GAD-67, a GABA synthetic enzyme） in normal and hypoxic ischemic （HI） brain. Methods C57/BL6 mice on postnatal day （P） 5, 9, 21 and 60, corresponding developmentally to premature, term, juvenile and adult human brain were investigated by using both Western blot and immunohistochemistry methods either in normal condition or after hypoxic ischemic insult. Results The immunoreactivity of GAD67 was up regulated with brain development and significant difference was seen between mature （P21, P60） and immature （P5, P9） brain. GAD67 immunoreactivity decreased in the ipsilateral hemisphere in all the ages after hypoxia ischemia （HI） insult, but, significant decrease was only seen in the immature brain. Double labeling of GAD67 and cell death marker, TUNEL, in the cortex at 8h post-HI in the P9 mice showed that （15.6±7.0）% TUNEL positive cells were GAD67 positive which was higher than that of P60 mice. Conclusion These data suggest that GABAergic neurons in immature brain were more vulnerable to HI insult than that of mature brain.

关键词： glutamic acid decarboxylase brain development hypoxia-ischemia

OBSERVATIONS ON DEFORMATION BEHAVIOR OF HIGH PERFORMANCE FIBERS BY POLARIZING OPTICAL MICROSCOPY

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Chinese Journal of Polymer Science 2000年第1期18卷 81-86页

作者： chang-fa Xiao Yu-feng Zhang Department of Materials Science, Tianjin Institute of Textile Science and Technology, Tianjin 300160, China 天津纺织工学院天津

By means of polarizing optical microscopy (POM), deformation behavior of four kinds of fibers, i.e, ultra high molecular weight polyethylene (UHMW-PE) fiber, polyvinyl alcohol (PVA) fiber, polyethylene terephthalate (PET) fiber, and wholly aromatic (rho-hydroxybenzoic acid/2-hydroxy-6-naphthoic acid) copolyester [P(HBA/HNA)]/PET (ACPET blend) fiber, in axial compression, axial impacting, and bending was observed. In compression, kink bands formed at an angle of 55-60 degrees ro the fiber axis in 10-times-drawn UHMW-PE fiber, 75-80 degrees in 40-times-drawn sample, 80 degrees in PVA fiber, and 90 degrees in the ACPET blend fiber. In impacting and bending, band angles of UHMW-PE, PVA and PET fibers are nearly the same as those formed in compression, indicating that slip systems do not change. For any of the four kinds of fiber, band spacing exhibits great differences in compression, in impacting, and in bending, which may be attributed to the differences in the degrees of strain or stress concentration.

关键词： high performance fiber axial compression axial impacting bending

Synthesis,formation mechanism,and intrinsic physical properties of several As/P-containing MAX phases

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Journal of Materials Science & Technology 2023年第2期133卷 23-31页

作者： Hongxiang Chen Sheng Li Jun Deng Zhilong Zhang Jianeng Huang fa chang Li Huang Shixuan Du Pinqiang Dai School of Materials Science and Engineering Fujian University of TechnologyFuzhou 350118China Institute of Physics&University of Chinese Academy of Sciences Chinese Academy of SciencesBeijing 100190China Fujian Provincial Key Laboratory of Advanced Materials Processing and Application Fuzhou 350118China Center for Advanced Energy and Functional Materials Fujian University of TechnologyFuzhou 350118China Songshan Lake Materials Laboratory Dongguan 523808China CAS Key Laboratory of Vacuum Physics Beijing 100049China

321 phases are an atypical series of MAX phases,in which A=As/P,with superior elastic properties,fea-turing in the MA-triangular-prism bilayers in the crystal *** now,besides Nb 3 As 2 C,the pure phases of the other 321 compounds have not been realized,hampering the study of their intrinsic ***,molten-salt sintering(MSS)and solid-state synthesis(SSS)were applied to synthesize As/P-containing 321 phases and 211 *** the phase composition of the end-product via multiple-phase Rietveld refinement,we found that MSS can effectively improve the purity of P-containing MAX phases,with the phase content up to 99%in Nb_(3)P_(2)C and 75.4(5)%in Nb 2 *** contrast,MSS performed poorly on As-containing MAX phases,only 8.9(4)%for Nb 3 As 2 C and 64(2)%for Nb 2 AsC,as opposed to the pure phases obtained by *** experimental analyses combined with first-principles calculations reveal that the dominant formation route of Nb_(3)P_(2)C is through NbP+Nb+C→Nb_(3)P_(2)***,we found that the benefits of MSS on P-containing MAX phases are on the facilitation of three consid-ered chemical reaction routes,especially on Nb 2 PC+NbP→Nb_(3)P_(2)***,the intrinsic physical properties and Fermi surface topology of two 321 phases consisting of electron,hole,and open orbits are revealed theoretically and experimentally,in which the electron carriers are dominant in electrical *** feasible synthesis methods and the formation mechanism are instructive to obtain high-purity As/P-containing MAX phases and explore new MAX ***,the intrinsic physical properties will give great support for future applications on 321 phases.

关键词： MAX phase Molten-salt synthesis Chemical reaction route Metallic ceramics Formation mechanism Quasi-harmonic approximation

Phlebotomine sand flies(Diptera:Psychodidae)transmitting visceral leishmaniasis and their geographical distribution in China:a review

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Infectious Diseases of Poverty 2016年第1期5卷 126-138页

作者： Li-Ren Guan Zheng-Bin Zhou chang-fa Jin Qing Fu Jun-Jie Chai National Institute of Parasitic Diseases Chinese Center for Disease Control and Prevention/Key Laboratory of Parasite and Vector BiologyMinistry Of Health/WHO Collaborating Center for Tropical DiseasesShanghai 200025China Center for Disease Control and Prevention of Xinjiang Uygur Autonomous Region Urumqi 830002China

After the existence of phlebotomine sand flies was first reported in China in 1910,the distribution of different species and their role in the transmission of visceral leishmaniasis(VL)have been extensively *** until 2008,four species have been verified as vectors of VL,namely,Phlebotomus chinensis(***),***(*** longiductus),***(*** wui),and *** sand fly species vary greatly depending on the natural environments in the different geographic areas where they are *** is euryecious and adaptable to different ecologies,and is thus distributed widely in the plain,mountainous,and Loess Plateau regions north of the Yangtze *** is mainly distributed in ancient oasis areas south of *** in the Xinjiang Uygur autonomous *** is the predominant species in deserts with Populus diversifolia and Tamarix vegetation in Xinjiang and the western part of the Inner Mongolia autonomous ***,*** is steroecious and found only in stony desert areas,such as at the foot of the mountains in Xinjiang and the western Hexi Corridor,in Gansu *** review summarized the relationship between the geographic distribution pattern of the four sand fly species and their geographical landscape in order to foster research on disease distribution and sand fly control ***,some problems that remained to be solved about vectors of VL in China were discussed.

关键词： Phlebotomus Sand fly Geographical distribution Vector Visceral leishmaniasis Leishmania donovani Leishmania infantum Ph.chinensis Ph.longiductus Ph.wui Ph.alexandri Ph.mongolensis