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Chinese Annals of Mathematics,Series B 2024年第2期45卷 193-220页

作者： huan WANG qin WANG Research Center for Operator Algebras School of Mathematical SciencesEast China Normal UniversityShanghai 200241China Key Laboratory of MEA Ministry of Educationand Shanghai Key Laboratory of PMMPEast China Normal UniversityShanghai 200241China

In this paper,for 1

关键词： The coarse l^(p)-Novikov conjecture Banach spaces with Property(H) Coarse geometry K-Theory

Wet-spinning of Regenerated Silk Fiber from Aqueous Silk Fibroin Solutions: Influence of Calcium Ion Addition in Spinning Dope on the Performance of Regenerated Silk Fiber

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Chinese Journal of Polymer Science 2014年第1期32卷 29-34页

作者： huan Zhou Zheng-zhong shao 陈新 State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Laboratory of Advanced Materials Fudan University

Ca（II） ions are added in the spinning dope to adjust the solidification rate of regenerated silk fibroin （RSF） solution during the wet-spinning process since Ca（II） ions are proved to be favorable to maintain the stable silk fibroin network in our previous work. The results show that when Ca（II）/RSF ratios are 1/50 and 1/20, the resulted RSF fibers exhibit good performance with the breaking energy more than 70 kJ/kg. However, higher Ca（II）/RSF ratio （for example, 1/10） hinders the solidification of spinning dope and results in poor RSF fibers. These observations together with earlier papers from this laboratory confirm that to produce tough silk fibers the spinning conditions must allow sufficient time for the adjustment of silk fibroin molecular chains.

关键词： Silk fiber Natural polymer Wet-spinning Protein Calcium.

Photoacoustic molecular imaging with functional nanoparticles

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Journal of Innovative Optical Health Sciences 2017年第4期10卷 17-28页

作者： Liming Liu huan qin Ministry of Education Key Laboratory of Laser Life Science and Institute of Laser Life Science College of Biophotonics South China Normal UniversityGuangzhou 510631P.R.China

Photoacoustic imaging(PAI)breaks through the optical di®usion limit by making use of the PA e®*** converting incident photons into ultrasonic waves,PAI combines high contrast of optical imaging and high spatial resolution in depth tissue of ultrasound imaging in a single imaging *** imaging modality has now shown potential for molecular imaging,which enables visualization of biological processes with systemically introduced functional *** the current review,the potentials of di®erent optical nanoprobes as PAI contrast agents were elucidated and discussed.

关键词： Photoacoustic imaging optical nanoprobes molecular imaging

Indocyanine green loaded graphene oxide for high-e±cient photoacoustic tumor therapy

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Journal of Innovative Optical Health Sciences 2016年第4期9卷 47-54页

作者： Baoyun Yan huan qin MOE Key Laboratory of Laser Life Science&Institute of Laser Life Science College of Biophotonics South China Normal University Guangzhou 510631 P.R.China

Photoacoustic therapy,using the photoacoustic efect of agents for selectively kling tumor cells,has shown pronising for treat ing *** of high optical absorption probes can help to effectively improve the photoacoustic ther apy ***,we report a novel high-absorpt:ion photoacoustic probe that is composed of indocyanine green(ICG)and gr aphene oxide(GO),entitled GO-ICG,for photoacoustic ther *** attached ICG with narrow absorption spectral profile has strong optical absorption in the infrared *** absorption spectrum of the GO-ICG solution reveals that the GO-ICG particles exhibited a 10-fold higher absorbance at 780 nm(its peak absorbance)as compared with ***,ICG's fluorescence is quenched by GO via fuorescence resonance energy *** a result,GO-ICG can high efficiently convert the absorbed light energy to acoustic wave under pulsed laser *** further demonstrate that GO-ICG can produce stronger photoacoustic wave than the GO and ICG ***,we conjugate this contrast agent with integrin 0。As mono dlonal antibody to molecularly target the U87-MG human glioblastoma cells for selective tumor cell ***,our results testify that the photoacoustic therapy eficiency of GO-ICG is higher than the existing photoacoustic therapy *** work demonstrates that GO-ICG is a high efficiency photo-acoustic therapy *** novel photoacoustic probe is likely to be an available candidate for tumor therapy.

关键词： Photoacoustic therapy photoacoustic effect tumor therapy

Bounds for Average toward the Resonance Barrier for GL(3)×GL(2)Automorphic Forms

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Acta Mathematica Sinica,English Series 2023年第9期39卷 1667-1683页

作者： huan qin Yang Bo Ye San Diego State University—Imperial Valley CalexicoCA92231USA Department of Mathematics The University of IowaIowa CityIowa52242-1419USA

Let f be a fixed Maass form for SL_3(Z)with Fourier coefficients A_(f)(m,n).Let g be a Maass cusp form for SL_2(G)with Laplace eigenvalue(1/4)+k^(2) and Fourier coefficientλ_(g)(n),or a holomorphic cusp form of even weight *** by S_(X)(f×g,α,β)a smoothly weighted sum of A_(f)(1,n)λ_(g)(n)e(αn~β)for X 0 are fixed real *** subject matter of the present paper is to prove non-trivial bounds for a sum of S_(X)(f×g,α,β)over g as k tends to∞with *** bounds for average provide insight for the corresponding resonance barriers toward the Hypothesis S as proposed by Iwaniec,Luo,and Sarnak.

关键词： Maass cusp form holomorphic cusp form Hypothesis S resonance barrier Kuznetsov trace formula Petersson's formula Voronoi's summation formula

Cross-correlations between 21 cm,X-ray and infrared backgrounds

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Chinese Journal of Astronomy and Astrophysics 2009年第1期9卷 73-84页

作者： huan-Yuan Shan Bo qin National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China

The history of the cosmological reionization is still unclear. Two ionizing sources, stars and QSOs, are believed to play important roles during this epoch. Besides the 21 cm signals, the infrared emission from PopⅢ stars and X-ray photons from QSOs can be powerful probes of the reionization. Here we present a cross-correlation study of the 21 cm, infrared and X-ray backgrounds. The advantage of doing such crosscorrelations is that we could highlight the correlated signals and eliminate irrelevant foregrounds. We develop a shell model to describe the 21 cm signals and find that PopIII stars can provide higher 21 cm signals than QSOs. Using the ROSAT data for X-ray and AKARI data for infrared, we predict various cross power spectra analytically and discuss prospects for detecting these cross-correlation signals in future low frequency radio surveys. We find that, although these cross-correlational signals have distinct features, so far, they have been difficult to detect due to the high noise of the soft X-ray and infrared backgrounds given by ROSAT and AKARI.

关键词： cosmology theory - X-rays diffuse background -infrared stars

Prospects of microwave-induced thermoacoustic imaging

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Journal of Electronic Science and Technology 2023年第3期21卷 21-37页

作者： Xing-Hua Wang huan qin Key Laboratory of Laser Life Science(Ministry of Education)&Institute of Laser Life Science College of BiophotonicsSouth China Normal UniversityGuangzhou510631China Guangdong Provincial Key Laboratory of Laser Life Science College of BiophotonicsSouth China Normal UniversityGuangzhou510631China Guangzhou Key Lab of Spectral Analysis and Functional Probes College of BiophotonicsSouth China Normal UniversityGuangzhou510631China

Microwave-induced thermoacoustic imaging(MTAI)has advantages including the large imaging depth,high imaging resolution,high imaging contrast,and fast imaging *** thermoacoustic(TA)group of South China Normal University has dedicated to developing TA imaging for more than a decade and has made many *** review introduces these breakthroughs from two aspects including the improvement in techniques and the exploration of *** the technological level,there are ultrashort microwave pulse(USMP)-induced􀀁TA imaging that can improve the imaging resolution,nonlinear thermoacoustic imaging(NTAI)that can improve the imaging contrast,polarized microwave-induced􀀁thermoacoustic imaging(P-MTAI)that can obtain cellular-level alignment information,and more convenient and accurate handheld and multimodal *** the application side,the optimization and expansion have been carried out,mainly concentrating on breast and myocardial ***,several current research directions are introduced,including the application of P-MTAI on joint imaging and research on whole-body imaging of small animals.

关键词： Applications in biomedical field Microwave-induced thermoacoustic imaging(MTAI) Nonlinear thermoacoustic imaging(NTAI) Polarized microwave-induced thermoacoustic imaging(P-MTAI) Ultrashort microwave pulse (USMP)-induced thermoacoustic imaging

Thermally confined shell coating amplifies the photoacoustic conversion efficiency of nanoprobes

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Nano Research 2016年第12期9卷 3644-3655页

作者： Yujiao Shi huan qin Sihua Yang Da Xing Ministry of Education Key Laboratory of Laser Life Science and Institute of Laser Life Science College of Biophotonics South China Normal University Guangzhou 510631 China

Efficient probes/contrast agents are highly desirable for good-performance photoacoustic （PA） imaging, where the PA signal amplitude of a probe is dominated by both its optical absorption and the conversion efficiency from absorbed laser energy to acoustic waves. Nanoprobes have a unique micro- mechanism of PA energy conversion due to the size effect, which, however, has not been quantitatively demonstrated and effectively utilized. Here, we present quantitative simulations of the PA signal production process for plasmon- mediated nanoprobes based on the finite element analysis method, which were performed to provide a deep understanding of their PA conversion micromechanism. Moreover, we propose a method to amplify the PA conversion efficiency of nanoprobes through the use of thermally confined shell coating, which allows the active control of the conversion efficiency beyond that of conventional probes. Additionally, we deduced the dependence of the conversion efficiency on the shell properties. Gold-nanoparticles/polydimethylsiloxane nanocomposites were experimentally synthesized in the form of gel and microfilms to verify our idea and the simulation results agreed with the experiments. Our work paves the way for the rational design and optimization of nanoprobes with improved conversion efficiency.

关键词： photoacousticnanoprobes micromechanism conversion efficiency shell coating

Spatial patterns of insect herbivory within a forest landscape:the role of soil type and forest stratum

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Forest Ecosystems 2021年第4期8卷 923-936页

作者： Xinliang shao qin Zhang Xitian Yang Key Laboratory of Plant Genetics and Molecular Breeding Zhoukou Normal University466001 ZhoukouChina College of Forestry Henan Agricultural University450002 ZhengzhouChina

Background:Insect herbivory has profound impacts on ecosystem processes and *** many efforts have been made to recognize the main drivers of insect herbivory at different scales,the results are *** likely reason is that studies have insufficiently captured the spatially heterogeneous factors such as soil type and forest stratum within the stand that may significantly affect insect *** particular,there is a lack of studies that address the detailed spatial patterns of insect herbivory which are influenced by these ***:We measured the detailed spatial patterns of insect herbivory on cork oak(Quercus variabilis Bl.)in response to soil type(gravel soil and loam)and forest stratum(the upper,lower,and sapling stratum),and correlated these patterns with a set of influencing factors(litter coverage,coverage of shrubs and herbs,soil nutrients,soil moisture,and leaf traits)in a forest ***:Generally,insect herbivory was spatially heterogeneous within *** was significantly lower in gravel soil areas than in loam soil areas and the highest herbivory occurred in the lower ***,there were also 41 individual plots in which the highest herbivory occurred in the upper stratum and 29 plots in which the highest herbivory occurred in the sapling *** were significant differences in soil nutrient and water status between soil types,but no significant differences in leaf *** effects of forest stratum on leaf traits were also inconsistent with those on insect ***:Leaf traits may not be the main factors influencing insect herbivory in the *** type may have major effects on herbivory patterns by influencing litter coverage while higher coverage of shrubs and herbs may reduce herbivory in the sapling *** findings may advance our understanding of tree-herbivore interactions in real-world situations and have important implications for the sustainable managemen

关键词： Forest stratum Heterogeneity Insect herbivory Leaf litter Leaf traits Soil nutrient Soil type