The glass transition temperature and microstructure of polyurethane/epoxy resin interpenetrating polymer networks nanocomposites

GLASS TRANSITION TEMPERATURE (TG) HAS BEEN EXTEN- SIVELY STUDIED FOR MANY POLYMERS SINCE IT IS ONE OF THE MOST FUNDAMENTAL FEATURES RELATIVE DIRECTLY TO POLYMER PROPERTIES. IN GENERAL, INORGANIC NANOFILLERS DO NOT DI- RECTLY CONTRIBUTE TO THE TG OF THE MA…     

Asymmetry between the upper and lower visual fields： An event-related potential study

ASYMMETRIES OF HUMAN VISUAL INFORMATION PROCESS- ING ACROSS VISUAL FIELDS HAVE BEEN AN INTERESTING ISSUE IN COGNITIVE PSYCHOLOGY AND NEUROSCIENCE. IN ADDITION TO INVESTIGATIONS OF THE ASYMMETRIES BETWEEN THE LEFT AND RIGHT VISUAL FIELDS THAT ARE BELIEVED …     

Preparation of protein-loaded microspheres with size≤10 μm by electrostatic droplet generation technology

AT PRESENT, ALMOST ALL PROTEIN DRUGS HAVE TO BE CLINI- CALLY ADMINISTERED VIA INJECTION ROUTES SUCH AS INTRAVE- NOUS INJECTION. ONE OF THE IMPORTANT PROBLEMS CON- FRONTED IS THAT THESE DRUGS SHOULD BE INJECTED REPEATEDLY DUE TO SHORT HALF-LIFE IN BLOOD. I…     

Duplication and divergent evolution of the CHS and CHS-like genes in the chalcone synthase （CHS） superfamily

CHALCONE SYNTHASE (CHS) IS A KEY ENZYME OF FLA- VONOID BIOSYNTHESIS. IT CATALYSES THE CONDENSATION OF THREE MOLECULES OF MALONYL-COA WITH ONE MOLECULE OF 4-COUMAROYL-COA TO FORM NARINGENIN CHALCONE, THE PRECURSOR FOR A LARGE NUMBER OF FLAVONOIDS WHICH ARE WIDELY DISTRIBUTED IN THE PLANT KINGDOM AND HAVE IM- PORTANT ROLES IN FLOWER PIGMENTATION, PROTECTION AGAINST UV LIGHT A…     

Genetic diversity and geographic pattern of wild lotus （Nelumbo nucifera） in Heilongjiang Province

1MATERIALS AND METHODS1.1PLANT MATERIALS FROM AUGUST TO SEPTEMBER IN2004,WE TRAVELED EX-TENSIVELY IN HEILONGJIANG PROVINCE LOOKING FOR THE WILD LOTUS.THE WILD LOTUS WAS FOUND AT40LOCALITIES AND49ACCESSIONS OF SAMPLES WERE COLLECTED AT THESE LOCALITIES(FIG…     

An overview of adakite petrogenesis

ADAKITE IS A PETROLOGIC TERM THAT DEFANT AND DRUM-MOND[1] FIRST INTRODUCED ~ 15 YEARS AGO TO REFER TO “VOL- CANIC OR INTRUSIVE ROCKS IN CENOZOIC ARCS ASSOCIATED WITH SUBDUCTION OF YOUNG (≤25 MA) OCEANIC LITHO- SPHERE”; THESE ROCKS ARE “CHARACTERIZED B…     

Barrier layer in the northeastern South China Sea and its formation mechanism

A VERTICALLY UNIFORM LAYER OF TEMPERATURE(ISOTHERMAL LAYER),SALINITY(ISOHALINE LAYER)AND DENSITY(MIXED LAYER)IS USUALLY FORMED IN THE UPPER OCEAN DUE TO THE WIND STIRRING.UNDERNEATH IS THE LAYER WITH RELATIVELY STRONG VERTICAL GRADIENT AS THE THERMOCLINE,…     

Non-viral gene delivery carrier of probe type host molecule ——Interactions between DNA and β-cyclodextrin derivative complexes (I)

GENE THERAPY IS A COMMON PROCESS TO DELIVER EXTRIN- SIC GENES INTO TARGET CELLS FOR FURTHER GENE EXPRESSION, FOR THE PURPOSE OF TREATING DISEASES. A WELL DESIGNED GENE DELIVERY CARRIER CAN EFFICIENTLY PACKAGE AND PRO- TECT NUCLEIC ACID FROM BEING DIGESTED BY A VARIETY OF ENZYMES IN VIVO AND SHOULD BE ABLE TO SPECIFICALLY LO- CATE EXTRINSIC GENES INTO THE TARGET ORGANISMS. S…     

Synthesis of novel organophosphorus C60 dimers

DUE TO THEIR OUTSTANDING PHYSICAL AND CHEMICALPROPERTIES,FULLERENE DIMERS HAVE PROVEN TO BE ATTRACTIVENANO-SCALE ORGANIC COMPOUNDS IN VARIOUS FIELDS SUCH ASNONLINEAR OPTICS,ORGANIC MATERIALS,BIOLOGY AND MEDI-CINE[1].AMONG THE FULLERENE DIMERS THAT HAVE BE…     

Imprint of solar activity on Nanjing stalagmite annual layer thickness sequence during the Last Glacial Maximum

PREVIOUS STUDIES ON ANNUAL GROWTH LAMINAE IN STA-LAGMITES SUGGESTED THAT IT IS A USEFUL PROXY TO INVESTI-GATE ANNUALLY HIGH-RESOLUTION CLIMATES[1―4].THE VARIA-TION OF ANNUAL LAMINAE THICKNESS HAS BEEN EXPLAINED AS REFLECTING SEASONAL CHANGES EITHER IN DR…     

Evaluation of the introgressed lines and screening for elite germplasm in Gossypium

THERE ARE 51 SPECIES IN THE GENUS OF GOSSYPIUM[1]. EXCEPT UPLAND COTTON CULTIVARS, WILD CULTIVARS, SPECIES AND RACE HAVE ABUNDANT GENETIC POLYMORPHISMS DUE TO THEIR VARIOUS ENVIRONMENTAL DISTRIBUTION AND LONG-TERM NATURAL SELECTION. THEREFORE, THEY POSSESS LOTS OF EXCEL- LENT GENES THAT CAN BE USED TO EXPLOIT POTENTIAL TRAITS, SUCH AS DROUGHT RESISTANCE, DISEASE AND INSECT …     

River discharge changes in the Qinghai-Tibet Plateau

THE QINGHAI-TIBET PLATEAU IS SENSITIVE TO GLOBAL CLI- MATE CHANGES, AND ITS MEAN WARMING AMPLITUDE DURING THE PAST 50 YEARS IS GREATER THAN THAT OF THE NORTHERNHEMISPHERE AND OTHER REGIONS IN THE SAME LATITUDE[1,2]. DUE TO ITS SPECIFIC GEOMORPHIC CONDITIO…     

The genetic diversity of Gaozhou wild rice analyzed by SSR

LOCATED AT 21°42′34″―22°18′48″N AND 110°36′48″― 111°22′45″E IN THE TRANSITION REGION FROM SOUTH SUB- TROPICS TO NORTH SUBTROPICS, GAOZHOU WILD RICE (GWR) IS COMMON WILD RICE (ORYZA RUFIPOGON GRIFF.) AND THE WIDEST WILD RICE POPULATION IN GUA     

Stability of alpine meadow ecosystem on the Qinghai- Tibetan Plateau

THE QINGHAI-TIBETAN PLATEAU PLAYS AN IMPORTANT ROLE IN THE ATMOSPHERIC CIRCULATION AND REGIONAL MONSOON CLIMATE, WHICH HAS GREAT INFLUENCE ON THE REGIONAL AND GLOBAL CLIMATE. THUS, THE CHANGE OF THE QINGHAI-TIBETAN PLATEAU ECOSYSTEM IS EXPECTED TO AFFECT …     

Interpreting grain-size trends associated with bedload transport on the intertidal flats at Dafeng, central Jiangsu coast

IN THE MARINE ENVIRONMENT, IT IS OFTEN DIFFICULT TO IDENTIFY THE NET SEDIMENT TRANSPORT PATHWAY BECAUSE OF THE COMPLICATED HYDRODYNAMICS AND SEDIMENT SOURCES. GAO AND COLLINS HAVE RE-EXAMINED A 1-D MODEL ORIGI- NALLY DERIVED BY MCLAREN AND BOWLES AND DEVE…     

Characterization, development and exploitation of EST-derived microsatellites in Gossypium raimondii Ulbrich

COTTON IS AN IMPORTANT GLOBAL CASH CROP. IN THE RECENTYEARS, MOLECULAR MARKER TECHNOLOGY HAS BEEN WIDELY APPLIED TO SUCH STUDIES ON COTTON AS GENETIC MAP- PING[1―4], VARIETY PURITY DETECTION[5], GENETIC DIVERSITY ANALYSIS[6], MOLECULAR MARKER-ASSISTED BR…     

Electron field emission from nano-crystalline Si films deposited by inductively coupled plasma CVD at room temperature

ELECTRON FIELD EMISSION IS ONE OF THE INTERESTING PER- FORMANCES OF NANO-SCALE MATERIALS [1-3]. CARBON NANO- TUBES HAVE BEEN DEMONSTRATED TO BE THE MOST FASCINAT- ING MATERIAL OF ELECTRON FIELD EMISSION, BUT THEIR INSTA- BILITY OF EMISSION DUE TO THE AGING EFFECT LIMITS THEIR APPLICATION IN VACUUM ELECTRONICS [4]. SI TIPS HAVE MORE FAVORITE GEOMETRIC FEATURE AND MORE STABLE C…     

Preparation, characterization and thermal behavior of silver behenate nanocrystals

TO PROVIDE A VISIBLE IMAGE, CONVENTIONAL WET PROC- ESSED PHOTOGRAPHIC IMAGING MATERIALS REQUIRE THE PROC- ESSING IN AQUEOUS BATH SUCH AS DEVELOPING AND FIXING[1].BY CONTRAST, THERMOGRAPHIC OR PHOTOTHERMOGRAPHIC MA- TERIALS PROVIDE USERS WITH A SIMPLE AND …     

一类广义Liénard型系统解的有界性

讨论了一类广义Li啨nard系统x.=h(y)φ(x)-F(x)p(y)y.=-g(x)p(y)q(y)解的有界性.首先获得了系统存在无界解的两个充分条件,然后获得了系统所有解正向有界的充分条件和充要条件,所得的结果改进和扩展了文献中的相应结果.     

简单系统的反射函数与周期解

利用反射函数理论研究线性系统x.=P(t)x为简单系统的充要条件,建立了系统的Poincar啨映射,并讨论该系统及与其等价的非线性微分系统x.=P(t)x+Fx-1(t,x)R(t,x)-R(-t,F(t,x))的周期解的存在性和稳定性.