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Analysis of the structure and expression of the 30K protein genes in silkworm, Bombyx mori

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Insect Science 2007年第1期14卷 5-14页

作者： QUAN sun PING ZHAO ying LIN YONG HOU QING-YOU XIA ZHONG-huai XIANG The Key Laboratory of Sericulture of Agriculture Ministry College of Sericultur~ and Biotechnology Southwest UniversityChongqing China

A group of lipoproteins with molecular sizes of approximately 30 kDa, referred to as 30K proteins, axe synthesized in fat body cells in the fifth instar larvae of silkworm, Bombyx mori. Analyzing the silkworm genome and its expressed sequence tags （ESTs）, we found 10 genes encoding 30K proteins, which are mainly distributed in three subfamilies. Of these, seven coding proteins were found to harbor the degrading sites of 30kP protease A, although the number of degrading sites may be different. As some potential core promoters and regulatory elements were supposed to be essential for gene transcription, the expression profiles of these genes were examined by semi-quantitative reverse transcription polymerase chain reaction. Eight 30K protein genes were detected to express luxuriantly in the fat body, while two were hardly expressed. Such results suggest that these 30K proteins may have different functions, and their adjacent regulatory elements play a crucial role in regulating their transcription.

关键词： 30K protein Bombyx mori expression structure

Supersolid Phase in One-Dimensional Hard-Core Boson Hubbard Model with a Superlattice Potential

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Communications in Theoretical Physics 2008年第11期50卷 1142-1144页

作者： GUO huai-Ming LIANG ying Department of Physics Capital Normal University Beijing 100037 China Department of Physics Beijing Normal University Beijing 100875 China

The ground state of the one-dimensional hard-core boson Hubbard model with a superlattice potential is studied by quantum Monte Carlo methods. We demonstrate that besides the CDW phase and the Mott insulator phase, the supersolid phase emerges due to the presence of the superlattice potential, which reflects the competition with the hopping term. We also study the densities of sublattices and have a clear idea about the distribution of the bosons on the lattice.

关键词： boson Hubbard model quantum Monte Carlo supersolid phase

An image encryption algorithm based on improved baker transformation and chaotic S-box

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Chinese Physics B 2021年第6期30卷 216-225页

作者： Xing-Yuan Wang huai-huai sun Hao Gao School of Information Science and Technology Dalian Maritime UniversityDalian 116026China

The algorithm is an image encryption algorithm based on the improved baker transformation and chaotic substitution box(S-box). It mainly uses the initial values and parameters of a one-dimensional logistic chaotic system as an encryption key. Specifically, in the image scrambling stage, the algorithm primarily uses an improved baker transform method to process the image. In the image diffusion stage, the algorithm first uses the chaotic S-box method to process the encryption key. Secondly, an exclusive OR(XOR) operation is performed on the image and the encryption key to initially diffuse the image. Finally, the image is again diffused using the method of ortho XOR. Simulation analysis shows that the algorithm can achieve good encryption effect, simple and easy implementation, and good security. In the digital image communication transmission, it has good practical value.

关键词： image encryption improved baker transformation chaotic S-box chaotic sequence

Asymmetric Information, Heterogeneous Prior Beliefs and Market Regulation

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Acta Mathematicae Applicatae Sinica 2021年第3期37卷 459-476页

作者： Hong LIU ying JIANG huai-nian ZHANG KLAS and School of Mathematics and Statistics Northeast Normal UniversityChangchun 130024China Department of Mathematics and Physics Beijing Institute of Petrochemical TechnologyBeijing 102617China

This paper studies the trading behavior of an irrational insider and its influence on the market equilibrium in the presence of market *** find that the market with only one insider with private information is almost close to a strong efficient market,under the condition of market *** the equilibrium,the probability of the insider being caught trading with private information is zero,which shows that the reasonable behavior of the regulator is to essentially give up *** the market efficiency and the irrational trader’s trading intensity all greatly improve because of the existence of the market regulation.

关键词： insider trading market regulation heterogeneous prior beliefs asymmetric information

Establishment and application of an SNP molecular identification system for grape cultivars

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Journal of Integrative Agriculture 2022年第4期21卷 1044-1057页

作者： WANG Fu-qiang FAN Xiu-cai ZHANG ying sun Lei LIU Chong-huai JIANG Jian-fu Zhengzhou Fruit Research Institute Chinese Academy of Agricultural SciencesZhengzhou 450009P.R.China

We aimed to develop a set of single nucleotide polymorphism(SNP) markers that can be used to distinguish the main cultivated grape(Vitis L.) cultivars in China and provide technical support for domestic grape cultivar protection, cultivar registration, and market rights protection. A total of 517 high-quality loci were screened from 4 241 729 SNPs obtained by sequencing 304 grape accessions using specific locus amplified fragment sequencing, of which 442 were successfully designed as Kompetitive Allele Specific PCR(KASP) markers. A set of 27 markers that completely distinguishes 304 sequenced grape accessions was determined by using the program, and 26 effective markers were screened based on 23 representative grape cultivars. Finally, a total of 46 out of 48 KASP markers, including 22 markers selected by the research group in the early stage, were re-screened based on 348 grape accessions. Population structure, principal component, and cluster analyses all showed that the 348 grape accessions were best divided into two populations. In addition, cluster analysis subdivided them into six subpopulations. According to genetic distance, V. labrusca, V. davidii, V. heyneana, and V. amurensis were far from V. vinifera, while V. vinifera×V. labrusca and V. amurensis×V. vinifera were somewhere in between these two groups. Furthermore, a core set of 25 KASP markers could distinguish 95.69% of the 348 grape accessions, and the other 21 markers were used as extended markers. Therefore, SNP molecular markers based on KASP typing technology provide a new way for mapping DNA fingerprints in grape cultivars. With high efficiency and accuracy and low cost, this technology is more competitive than other current identification methods. It also has excellent application prospects in the grape distinctness, uniformity, and stability(DUS) test, as well as in promoting market rights protection in the near future.

关键词： grape KASP marker variety identification fingerprint genetic diversity analysis

Numerical investigation on the geodynamical mechanism of the first major shock of 2006 Pingtung M_w7.0 earthquake

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Science China Earth Sciences 2011年第5期54卷 631-639页

作者： sun YuJun ZHANG huai SHI YaoLin Laboratory of Computational Geodynamics Graduate University of Chinese Academy of Sciences Beijing 100049 China

A strong Mw7.0 earthquake struck Pingtung offshore of Talwan on December 26, 2006. It consisted of two major events with an 8-minute interval. The first major shock occurred at 12：26 UTC. Focal mechanism results from Harvard, USGS, and BATS all indicated that the first major shock was a normal fault earthquake and the second one was dominated by strike-slip offsets. The location of the epicenter varied greatly in depth in different analyses. The latest results showed that the focal depth of the first shock was most probably around 40-44 km, placing the epicenter in the lithospheric mantle. However, this is not a location where earthquakes usually occur. To explore the geodynamical mechanism of this event, we carded out 2D finite element method （FEM） numerical experiments. Our primary results indicate that the geodynamical background, as well as the formation of Pingtung earthquake, is a consequence of the collision between Luzon arc and Chinese continental margin. Although Taiwan Island is in the shadow of NW-SE trending compressive collision zone, the existence of ductile lower crust leads to the decoupling between upper crust and lithospheric mantle. As lithospheric mantle subducts to the depth of around 250 km, the upper part of the bending subduction slab puts itself in an extensional state. The extensional stress from bending induced the occurrence of this normal fault earthquake at the critical point.

关键词： Pingtung earthquake geodynamical mechanism FEM simulation hierarchical rheology geodynamics

Prediction of adsorption of small molecules in porous materials based on ab initio force field method

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Science China Chemistry 2008年第8期51卷 760-767页

作者： LIU LianChi FU Jia sun huai School of Chemistry and Chemical Technology Shanghai Jiao Tong University Shanghai 200240 China

Computational prediction of adsorption of small molecules in porous materials has great impact on the basic and applied research in chemical engineering and material sciences. In this work,we report an approach based on grand canonical ensemble Monte Carlo(GCMC) simulations and ab initio force fields. We calculated the adsorption curves of ammonia in ZSM-5 zeolite and hydrogen in MOF-5(a metal-organic-framework material). The predictions agree well with experimental data. Because the predictions are based on the first principle force fields,this approach can be used for the adsorption prediction of new molecules or materials without experimental data as guidance.

关键词： Porous materials adsorption ab initio force field Grand Canonical ensemble Monte Carlo

Spatiotemporal changeof vegetationcoverage recovery and its driving factors in the Wenchuan earthquake-hit areas

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Journal of Mountain Science 2021年第11期18卷 2854-2869页

作者： sun Xiao-fei YUAN Lin-guo ZHOU ying-zhi SHAO huai-yong LI Xian-feng ZHONG Ping Faculty of Geosciences and Environmental Engineering Southwest Jiaotong UniversityChengdu 611756China College of Earth Science Chengdu University of TechnologyChengdu 610059China Natural Resources and Planning Bureau of Nanchong Nanchong 637000China Department of Geography National University of SingaporeKent Ridge 117570Singapore

Vegetation coverage recovery after the Wenchuan earthquake has important implications for preventing post-seismic geohazards and soil ***,spatiotemporal changes in vegetation coverage recovery and its driving factors have not been sufficiently studied in the quake-hit *** paper aims to analyze vegetation coverage recovery and its driving factors in the quake-hit areas using monadic linear regression,coefficient of variation,and geographical ***,we used Moderate-resolution Imaging Spectroradiometer(MODIS)data to calculate the vegetation coverage from 2008 to 2018 in the quake-hit ***,we assessed the trend and stability of vegetation recovery in the quake-hit areas based on vegetation ***,combined with topography,climate,soil type,vegetation type,and human activities in the quake-hit areas,the driving factors affecting vegetation coverage recovery were *** results showed that the vegetation coverage level in the quake-hit areas recovered about 90%of that before the *** coverage recovery was mainly improved in a stepwise manner:increasing and then stabilizing,then increasing and stabilizing ***,soil type,and road density were the main factors affecting vegetation coverage recovery,and the interaction among all factors positively strengthened their impacts on vegetation coverage *** addition,the results also revealed the categories that were conducive to vegetation coverage recovery among the same environmental factors and can provide a scientific reference for vegetation coverage recovery in the quake-hit areas.

关键词： Wenchuan earthquake Vegetation coverage recovery Geographical detector Driving factors

Stretchable and self-healing conductive fibers from hierarchical silver nanowires-assembled network

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Nano Research 2024年第2期17卷 763-770页

作者： ying-ying Wu Hong Chen Fan Zhang Pan Guo Haili Qin huai-Ping Cong Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering School of Chemistry and Chemical EngineeringHefei University of TechnologyHefei 230009China

Conductive fibers(CFs)with features of high conductivity,stretchability,self-healability,and electromechanical stability are key components of the increasingly popular wearable ***,since the lack of structural design of conductive network and interfacial interaction between soft polymer and conductive additives,it is still hard to enable CFs to meet above ***,we describe a facial drawing method from a hydrogel reservoir which is remolded into ultrathin and stretchable CFs with excellent multi-responsive *** hydrogel reservoir was fabricated in synergy of an ice-templating method and in situ polymerization using the assembled framework as a *** on the effective fabrication mechanism,the diameter of CFs could be well-tuned from 90 to 400μm by adjusting the dipping depth of the glass rod,accompanied with conductivity increased from 0.75 to 2.5 S/*** the hierarchical network structure was well maintained in the CFs,professional performances have been proved on the stretchability and electromechanical *** presence of massive hydrogen bonding and Ag–S bond enabled the CFs with excellent self-healability under the conditions of contact,electric field,and near infrared light,***,the CFs with high sensing property could be integrated into an advanced textile sensor through an effective healing-induced integration strategy,demonstrating its great potentials as superior two-dimensional(2D)electronic skins.

关键词： conductive fibers self-assembled silver nanowires Ag–S coordination self-healing flexible sensors