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Chinese Journal of Polymer Science 2017年第7期35卷 837-845页

作者： Le-yuan song 蒋妮甘志华 State Key Laboratory of Organic-Inorganic Composites Beijing Laboratory of Biomedical Materials College of Life Science and Technology Beijing University of Chemical Technology Beijing 100029 China

Porous hybrid microspheres were fabricated by the synthesized calcium gluconate-g-poly（D,L-lactide）（CG-g- PDLLA） composites. These hybrid microspheres were treated with an alkaline solution for different period of time to control the amount of generated carboxylate groups and remained CG on the surface. The microspheres were then incubated in a supersaturated simulated body fluid （1.5 SBF） solution for different time to investigate their biomimetic mineralization behavior. The depositions were found to have a fine cluster morphology, a similar crystal structure and chemical structure to natural hydroxyapatite, and a medium Ca/P of approximately 1.30. The effect of surface treating time on the structure and mineralization behavior of these microspheres has been discussed in detail. The results indicate that the nucleation and growth of apatite on the surface are influenced by the induced carboxylate groups and the remained CG. The hybrid CG-g- PDLLA microspheres have the potential as a novel alternative in bone tissue engineering.

关键词： Calcium gluconate Poly(D,L-lactide) Mineralization Hydroxyapatite Porous microspheres

ON THE PROBLEM OF DISSIPATIVE PERTURBATIONS OF NONEXPANSIVE MAPPINGS

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Applied Mathematics and Mechanics(English Edition) 2001年第4期22卷 478-482页

作者： LUO yuan-song(罗元松) Department of Mathematics Yibin Teachers'' CollegeYibin 644007 P R China

Some Fixed point theorems for mappings of the type - A + T are established, where P is a cone in a Hilbert space, A: P --> 2(P) is an accretive mappings and T: P --> P is a nonexpansive mappings. In application, the results presented in the paper are used to study the existence problem of solutions far a class of nonlinear integral equations in L-2 (Omega).

关键词： nonexpansive mapping accretive mapping fixed point theorem nonlinear integral equation

Effect of ramipril on progression of nonculprit lesions in patients with ST-elevation myocardial infarction after primary percutaneous coronary intervention

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Journal of Geriatric Cardiology 2019年第9期16卷 695-700页

作者： Jian WANG song-yuan HE Department of Cardiology Aerospace Central Hospital Aerospace Clinical Medical College of Peking University

Objective To investigate the effect of ramipril on progression of nonculprit lesions in patients with ST-elevation myocardial infarction(STEMI) after primary percutaneous coronary intervention(PPCI). Methods A total of 200 patients(60.1 ± 11.3 years) with STEMI who underwent successful PPCI from January 2010 to December 2013 were enrolled in this study. All patients underwent PPCI as treatment for culprit lesions. Patients were divided into two groups according to the dosage of ramipril used at hospital discharge as follows: high dosage group(2.5–10 mg, q.d.) and low dosage group(1.25–2.5 mg, q.d.). Clinical and angiographic follow-up was performed for 12 months. The primary endpoint was clinically-driven percutaneous coronary intervention(PCI) for nonculprit lesions. The clinical and angiographic features were analyzed. Results Clinical and angiographic follow-up was performed with 87 patients in the high dosage group and 113 patients in the low dosage group. The numbers of patients who underwent additional PCI were six and 20 in the high and low dosage groups, respectively. The rate of having additional PCI performed was lower in the high dosage group than in the low dosage group(6.90% vs. 17.70%, P = 0.03). Conclusions A high dosage of ramipril may prevent progression of nonculprit lesions, which could be the major cause of recurrent PCI in patients with STEMI after PPCI.

关键词： Nonculprit lesion Primary percutaneous coronary intervention Ramipril ST-elevation myocardial infarction

Roles of abscisic acid and gibberellins in maintaining primary and secondary dormancy of Korean pine seeds

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Journal of Forestry Research 2020年第6期31卷 2423-2434页

作者： yuan song Jiaojun Zhu Qiaoling Yan Qingyuan Forest CERN Chinese Academy of SciencesShenyang 110016People’s Republic of China CAS Key Laboratory of Forest Ecology and Management Institute of Applied EcologyShenyang 110016People’s Republic of China University of Chinese Academy of Sciences Beijing 100049People’s Republic of China

Primary dormancy of seeds of Korean pine(Pinus koraiensis *** Zucc.)after dispersal in the autumn and the induction of secondary dormancy the fi rst summer following seed dispersal limit the regeneration of mixed broadleaved Korean pine forests in Northeast *** study was to determine how changes in the levels of abscisic acid(ABA)and gibberellic acid(GA)maintain primary and secondary dormancy of Korean pine seeds under germination *** transferred seeds with one of fi ve primary dormancy states or three secondary dormancy states to germination conditions and measured changes in the levels of ABA,GA 1+3(GA 1 and GA 3)and GA 4+7(GA 4 and GA 7)in the seed coat,megagametophyte and embryo during *** coat ABA levels in primary dormant seeds(PDS)and ABA levels in various parts of secondary dormant seeds(SDS)gradually declined during incubation but were still higher than in seeds for which dormancy was progressively *** 4+7 and GA 1+3 levels in embryos greatly decreased 35%and 24%,respectively,during incubation of SDS,and thus,the ratio of ABA to GA 4+7 in embryos and megagametophytes signifi cantly *** ratio of ABA to GA 1+3 in various parts of SDS increased slightly during *** contrast,in seeds for which secondary dormancy was already released,GA 4+7 and GA 1+3 levels in the embryo,GA 4+7/ABA ratio in the embryo and seed coat,and the GA 1+3/ABA in the embryo and megagametophyte signifi cantly increased during *** was no trend in the changes in the levels of ABA,GA 4+7 or GA 1+3 in embryos and megagametophytes of PDS or the levels of GA 4+7 or GA 1+3 in megagametophytes of SDS during *** results suggest that high ABA levels in the seed coat maintain primary dormancy of Korean pine *** of secondary dormancy involves a reduction of GA 4+7,GA 1+3,GA 4+7/ABA,and GA 1+3/ABA and the retention of high ABA levels.

关键词： Abscisic acid Gibberellic acid 4 and acid 7 Gibberellic acid 1 and acid 3 Korean pine Primary dormancy Secondary dormancy

Sludge reduction with Tubificidae and the impact on the performance of the wastewater treatment process

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Journal of Environmental Sciences 2007年第3期19卷 257-263页

作者： GUO Xue-song LIU Jun-xin WEI yuan-song LI Lin Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

To reduce excess sludge, a Tubificidae reactor was combined with an integrated oxidation ditch with vertical circle （IODVC）, and a new integrated system was developed for wastewater treatment, A pilot-scale of this integrated system was tested to investigate the sludge reduction with Tubificidae and the impact on effluent quality and sludge production. The dominant worm was Branchnria Sowerbyi in the Tubificidae reactor after inoculation of Branchnria Sowerbyi and Limnodrilns sp., and the maximal volume density of wet Tubificidae in vessels of the Tubificidae reactor was 17600 g/m^3. Two operational modes, treating the excess sludge （first mode） and the returned sludge （second mode） of IODVC by the Tubificidae reactor, were used in this experiment. The results showed that the excess sludge reduction rate was 46.4% in the first mode, and the average sludge yield of the integrated system was 6.19× 10^-5 kg SS/kg COD in the second mode. Though the sludge returned to IODVC via the Tubificidae reactor, it had little impact on the effluent quality and the sludge characteristics of the IODVC. No new type of recalcitrant substance in the supernatant was discharged into the environment when the sludge was treated by Tubificidae. The experimental results also indicated that no significant changes occurred on the viscosity, specific resistance, and the floc size distribution of the sludge.

关键词： integrated wastewater treatment system sludge reduction wastewater treatment Tubificidae

Dunkl's Theory and Best Approximation by Entire Functions of Exponential Type in L_2-metric with Power Weight

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Acta Mathematica Sinica,English Series 2014年第10期30卷 1748-1762页

作者： Yong Ping LIU Chun yuan song School of Mathematical Sciences Beijing Normal University Laboratory of Mathematics and Complex Systems Ministry of Education

In this paper, we study the sharp Jackson inequality for the best approximation of f ∈L2,k（Rd） by a subspace Ek2（σ）（SEk2（σ））, which is a subspace of entire functions of exponential type （spherical exponential type） at most σ. Here L2,k（Rd） denotes the space of all d-variate functions f endowed with the L2-norm with the weight vk（x）=Пζ∈R＋}（ζ,x）}2k（ζ）,which is defined by a positive subsystem R＋ of a finite root system R Rd and a function k（ζ）：R→R＋ invariant under the reflection group G（R） generated by R. In the case G（R） = Z2d, we get some exact results. Moreover, the deviation of best approximation by the subspace Ek2（σ）（SE2（σ）） of some class of the smooth functions in the space L2,k（Rd） is obtained.

关键词： Reflection group Dunkl transform Bessel function Jackson inequality continuous modulus

Oral Microbiology:Past,Present and Future

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International Journal of Oral Science 2009年第2期1卷 47-58页

作者： Xue-song He Wen-yuan Shi School of Dentistry the University of California Los Angeles USA

Since the initial observations of oral bacteria within dental plaque by van Leeuwenhoek using his primitive microscopes in 1680, an event that is generally recognized as the advent of oral microbiological investigation, oral microbiology has gone through phases of ＂reductionism＂ and ＂holism＂. From the small beginnings of the Miller and Black period, in which microbiologists followed Koch＇s postulates, took the reductionist approach to try to study the complex oral microbial community by analyzing individual species; to the modem era when oral researchers embrace ＂holism＂ or ＂system thinking＂, adopt new concepts such as interspecies interaction, microbial community, biofilms, poly-microbial diseases, oral microbiological knowledge has burgeoned and our ability to identify the resident organisms in dental plaque and decipher the interactions between key components has rapidly increased, such knowledge has greatly changed our view of the oral microbial flora, provided invaluable insight into the etiology of dental and periodontal diseases, opened the door to new approaches and techniques for developing new therapeutic and preventive tools for combating oral polymicrobial diseases.

关键词： oral microbiology biofilms dental caries oral pathogenesis

A pilot scale anoxic/oxic membrane bioreactor(A/O MBR) for woolen mill dyeing wastewater treatment

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Journal of Environmental Sciences 2003年第4期15卷 449-455页

作者： ZHENG Xiang FAN Yao bo WEI yuan song Department of Water Pollution Control Technology Research Center for Eco Environmental SciencesChinese Academy of SciencesBeijing 100085China.

A pilot scale(10 m 3/d) anoxic/oxic membrane bioreactor(A/O MBR) was tested for dyeing wastewater treatment of woolen mill without wasting sludge in 125 days operation. Results showed that the effluent quality was excellent, i.e. effluent COD less than 25 mg/L, BOD 5 under 5 mg/L, turbidity lower than 0 65 NTU, and colour less than 30 DT, and met with the reuse water standard of China. The removal rates of COD, BOD 5, colour, and turbidity were 92 4%, 98 4%, 74% and 98 9%, respectively. Constant flux operation mode was carried out in this study, and backwash was effective for reducing membrane fouling and maintaining constant flux. Membrane fouling had heavy impact on energy consumption. More attention should be paid on pipe selection and design for the sidestream MBR system, too.

关键词： activated sludge backwash constant flux dyeing wastewater treatment membrane bioreactor (MBR) woolen mill

Electrokinetic movement of multiple chlorobenzenes in contaminated soils in the presence of β-cyclodextrin

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Journal of Environmental Sciences 2007年第8期19卷 968-976页

作者： yuan song-hu WAN Jin-zhong LU Xiao-hua School of Environmental Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China.

This study investigated the electrokinetic （EK） behavior of multiple chlorobenzenes, including 1,2,3,4-tetrachlorobenzene （TeCB）, 1,2,4,5-tetrachlorobenzene （i-TeCB）, and 1,2,3-trichlorobenzene （TCB） in contaminated clayed soils. The effect of β-cyclodextrin （β- CD） on the EK removal of the chlorobenzenes was studied. The largest removal was obtained when Na2CO3/NaHCO3 buffer was used as anodic purging solution without β-CD. The removal efficiencies were related to the aqueous solubilities of chlorobenzenes. With the same cumulative electroosmotic flow, greater solubility led to higher removal efficiency. The addition of β-CD inhibited the EK removal efficiency of all chlorobenzenes. The inhibition increased with the increase of β-CD concentration. With the same β-CD concentration, the inhibition increased with the rise of electric potential. It was found that the inclusion compounds between β-CD and chlorobenzenzes were less soluble than chlorobenzenes. The formation of the less soluble inclusion compounds reduced the aqueous solubility of chlorobenzenes and led to the partial immobilization of the chlorobenzenes that desorbed from soil. It was feasible to use the EK technology to remove chlorobenzenes in contaminated soils using water as the anodic flushing solution. The addition of β-CD was not recommended for the EK removal of chlorobenzenes.

关键词： chlorobenzenes electrokinetic soil remediation β-cyclodextrin (β-CD)

The Classification of Carbon Dots and the Relationship between Synthesis Methods and Properties

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Chinese Journal of Chemistry 2023年第17期41卷 2206-2216页

作者： Xin-Xiang Zhao song-yuan Tao Bai Yang State Key Laboratory of Supramolecular Structure and Materials Collegeof ChemistryJilin UniversityChangchunJilin 130012China

Comprehensive Summary,The carbon dots(CDs),as emerging carbon based nanomaterials,are a kind of fluorescent materials with wide application *** luminous CDs can simply be synthesized by a wide variety of easily accessible *** have excellent optical properties,high biocompatibility and low toxicity,which makes them be used in the fields of optics,biology,energy,and so *** this review,the classification,nomenclature,photoluminescence mechanism and property regulation of CDs are ***.

关键词： Nanoparticles Nanostructures Luminescence Fluorescence Polymerization Carbon dots Classification and nomenclature Structure and performance