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Search Results: 1 - 10 of 43959 matches for " Huixian Wu "
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Invasion and Morphological Variation of the Non- Indigenous Barnacle Chthamalus challengeri(Hoek, 1883) in Yangshan Port and its Surrounding Areas Invasion and Morphological Variation of the Non- Indigenous Barnacle Chthamalus challengeri(Hoek, 1883) in Yangshan Port and its Surrounding Areas
LIU Yan,XUE Junzeng,LIN Junda,WU Huixian
- , 2015,
Abstract: Invasive species generally possess unique characteristics that allow them to survive the invasion process in order to establish and spread in new habitats. Successful invaders must resist both physical and physiological stresses associated with the changing environment. A common littoral barnacle, Chthamalus challengeri Hoek, 1883(Crustacea, Cirripedia), which is native to Japan, South Korea and northern China, has become established in the high-littoral zone adjacent to Yangshan Port, Shanghai, China. A comparison of the morphology of Chthamlus species from Zhoushan archipelago with previous description indicates the occurrence of C. challengeri. The new immigrant becomes a dominant species in certain high-intertidal habitats of the adjacent area to of Yangshan Port. C. challengeri was found in part of sampling sites in Zhoushan in 2010; however, it dispersed to all the eleven sampling sites in 2012. Densities of C.challengeri had increased over 10 times in the last 2 years, with the highest mean value reaching 39533 ± 6243 ind. m-2 in the new habitat. The specific ratios of both operculum area(Sa) to base area(SA) and average height of parietal plates(H) to length of base(L) revealed that C. challengeri displays morphological changes to resist stronger currents in the new habitats for invasion
Orientation, Attachment and Population Characteristics of the Goose Barnacle Octolasmis neptuni Living on the Gills and Mouth Appendages of the Swimming Crab Portunus trituberculatus

XUE Junzeng,WU Huixian,

生态学报 , 2002,
Abstract: Octolasmis is a special Genus in Cirripede. Octolasmis spp. attached on the gills and appendages of crab. They have formed the special biological characteristics for adapting the sessile life during the long term evolutionary process, effecting the breath, development and ingestion of hosts. Goose barnacle, O. neptuni attached on the gills and appendages of the swimming crab, Portunus trituberculatus, one of the important crab in China, effecting the growth and development of the hosts. We stu...
On the chitin digestive bacteria from larval gut of Eriocheir sinensis

XUE Junzeng,WU Huixian,

应用生态学报 , 2003,
Abstract: The foregut,mid gut and hind gut of Eriocheir sinensis from the first Zoea to Megalopa were dissected under asepsis condition. Bacteria were separated by plate culture after liquid medium culture. A chitin digestive bacterium was separated from the first Zoea foregut. The chitin digestive bacteria weren't founded in the same experiment from the second Zoea to Megalopa. The chitin digestive bacteria showed roundness, protuberance, glassy humid, margin regular, milk yellow, aerotolerant anaerobe,and growing intently surrounding the chitin on the plate culture medium. The chitin could promote the growth rate of some digestive bacteria in larval gut of the crab.
MOLECULAR SIZE DISTRIBUTION OF AQUATIC HUMIC SUBSTANCES 1 .A sequential gel filtration chromatography method

Tao Shu,Wu Huixian,Zhang Zongmin,

环境科学学报 , 1990,
Abstract: A sequential gel filtration chromatography coupled with UV detector was applied for the characterization of molecular size distribution of aquatic humic substances.The working range of the system using Sephadex G-25 and G-100 covers almost the whole range of the molecular size distribution of aquatic humic substances.The system was calibrated using standard proteins and a discontinuous function can fit the calibration curve well.
Approximate Inertial Manifold for a Class of the Kirchhoff Wave Equations with Nonlinear Strongly Damped Terms  [PDF]
Chengfei Ai, Huixian Zhu, Guoguang Lin
International Journal of Modern Nonlinear Theory and Application (IJMNTA) , 2016, DOI: 10.4236/ijmnta.2016.54020
Abstract: This paper is devoted to the long time behavior of the solution to the initial boundary value problems for a class of the Kirchhoff wave equations with nonlinear strongly damped terms: \"\". Firstly, in order to prove the smoothing effect of the solution, we make efficient use of the analytic property of the semigroup generated by the principal operator of the equation in the phase space. Then we obtain the regularity of the global attractor and construct the approximate inertial manifold of the equation. Finally, we prove that arbitrary trajectory of the Kirchhoff wave equations goes into a small neighbourhood of the approximate inertial manifold after large time.

Qiao Huixian,Chen Kuixue,Ma Qiyong,Wu Yan,

环境科学学报 , 1993,
Abstract: The authors studied the possibility of making activated carbon from coal fly ash which was recovered by removing dust in the kiln of a ceramic work-shop. The research results showed that satisfactory granular activated carbon could be made from coal fly ash so long as the ash content of the fly ash was less than 20%. The activated carbon had 4QOmg C6H6/g adsorption capacity, 700mg I2/g iodine number,55% CC14 activity, 1000m2/g specific surface area. This activated carbon can be used for organic solvent recovery, gas/water purificaton and as the carrier of catalysts.
Individual dispersion of synthetic imogolite nanotubes via droplet evaporation
HuiXian Yang,ZhaoHui Su
Chinese Science Bulletin , 2007, DOI: 10.1007/s11434-007-0305-y
Abstract: Morphology of synthetic imogolite nanotubes formed in droplet evaporation was investigated by transmission electron microscopy and electron diffraction. The nanotubes form a dense entangled network at higher concentrations, while at lower concentrations the nanotubes are liable to form oriented bundles. Under enthanol atmosphere, individual dispersion of nanotubes was observed for the first time, which reveals the length polydispersity of synthetic imogolite nanotubes.
Deriving aquatic water quality criteria for inorganic mercury in China by species sensitivity distributions

ZHANG Ruiqing,WU Fengchang,LI Huixian,FENG Chenglian,GUO Guanghui,

环境科学学报 , 2012,
Abstract: According to the characteristics of aquatic biota composition in China,a total of 90 acute toxicity data of aquatic organism were screened including plants,invertebrates,and vertebrates.The sensitivity of various organisms was discussed using the approach of species sensitivity distribution,and then the aquatic water quality criteria of inorganic mercury in China were derived.Those results showed that crustacean was the most sensitive organism for inorganic mercury,and the log-Slogistic3 model provided the best fit for various sets of data.The acute water quality criteria and chronic water quality criteria for inorganic mercury were 1.743 and 0.467 μg · L-1,respectively,which were comparable to that of other countries.However,detail analysis indicated that there were slightly differences among water quality criteria in different countries due to the variability in species composition of different regions.Therefore,the aquatic water quality criteria of inorganic mercury might be used as a candidate guideline to protect aquatic organisms of surface water ecosystems in China against toxic effects of inorganic mercury owing to the high concentration in a short-term exposure and the low concentration in a long-term exposure.Compared with mercury concentration of natural surface water in Southwest China,active inorganic mercury in surface water might be little potential adverse effects to aquatic organisms except for Jialing River.
Comparison of mercury species sensitivity distributions of freshwater biota in China and the United States

LI Huixian,ZHANG Ruiqing,WU Fengchang,GUO Guanghui,FENG Chenglian,

环境科学学报 , 2012,
Abstract: Based on single-species freshwater acute toxicity data in China and the United states, species sensitivity distributions (SSDs) of vertebrates (including fish) and invertebrates (including arthropods and non-arthropod invertebrates) to mercury were constructed, and species sensitivity to mercury in these two countries were compared. The results of this study indicated that there was no significant difference between sensitivity distributions of the Chinese and American taxa. However, the hazardous concentration for 5% of the species (HC5) range of Chinese species to short-term mercury exposure was lower than that of the American species, especially for non-arthropod invertebrates. HC5 for American non-arthropod invertebrates to mercury was 7.4 times larger than that for the corresponding Chinese species. Under the 95% protection level and including all the species, the tested invertebrates were more sensitive to mercury than the vertebrates in both China and the United States. However, in the lower taxonomic classification level, the sensitivity decreased in the order of arthropod > non-arthropod invertebrates > fish in China, but the order was arthropods > fish > non-arthropod invertebrates in the United States. Therefore, in determining the water quality criteria based on the sensitivity of all the species, we should also consider the influence of SSD of individual groups. The water quality criteria derived from the species sensitivity distribution of American species may make the aquatic species in China out of protection.
Outflows and Bubbles in Taurus: Star-formation Feedback Sufficient to Maintain Turbulence
Huixian Li,Di Li,Lei Qian,Duo Xu,Paul F. Goldsmith,Alberto Noriega-Crespo,Yuefang Wu,Yuzhe Song,Rendong Nan
Physics , 2015, DOI: 10.1088/0067-0049/219/2/20
Abstract: We have identified outflows and bubbles in the Taurus molecular cloud based on the $\sim 100$ deg$^2$ Five College Radio Astronomy Observatory $^{12}$CO(1-0) and $^{13}$CO(1-0) maps and the Spitzer young stellar object catalogs. In the main 44 deg$^2$ area of Taurus we found 55 outflows, of which 31 were previously unknown. We also found 37 bubbles in the entire 100 deg$^2$ area of Taurus, all of which had not been found before. The total kinetic energy of the identified outflows is estimated to be $\bf \sim 3.9 \times 10^{45}$ erg, which is \textbf{1\%} of the cloud turbulent energy. The total kinetic energy of the detected bubbles is estimated to be $\sim 9.2 \times 10^{46}$ erg, which is 29\% of the turbulent energy of Taurus. The energy injection rate from outflows is $\bf \sim 1.3 \times 10^{33}~\rm erg\ s^{-1}$, \textbf{0.4 - 2 times} the dissipation rate of the cloud turbulence. The energy injection rate from bubbles is $\sim 6.4 \times 10^{33}$ erg s$^{-1}$, \textbf{2 - 10 times} the turbulent dissipation rate of the cloud. The gravitational binding energy of the cloud is $\bf \sim 1.5 \times 10^{48}$ {\bf erg}, \textbf{385} and 16 times the energy of outflows and bubbles, respectively. We conclude that neither outflows nor bubbles can \textbf{provide enough energy to balance the overall gravitational binding energy and the turbulent energy of Taurus. However,} in the current epoch, stellar feedback is sufficient to maintain the observed turbulence in Taurus.
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