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The development of graphene-based devices for cell biology research

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Frontiers of Materials Science 2014年第2期8卷 107-122页

作者： zhi-qin YAN Wei ZHANG School of Mechanical Jinzhong University Yuci Jinzhong 030600 China CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety National Center for Nanoscience and Technology 11 Beiyitiao 7hongguancun Beijing 100190 China

Graphene has emerged as a new carbon nanoform with great potential in many applications due to its exceptional physical and chemical properties. Especially, graphene and its derivatives are also gaining a lot of interest in the biomedical field as new components for biosensors, tissue engineering, and drug delivery. This review presents unique properties of graphene, the bio-effects of graphene and its derivatives, especially their interactions with cells and the development of graphene-based biosensors and nanomedicines for cancer diagnosis and treatment.

关键词： graphene graphene oxide (GO) cell sensor cancer

Random Group Recommendation Model Based on Fuzzy Clustering

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Journal of Electronic Science and Technology 2020年第2期18卷 169-178页

作者： Zhe Ding Zhen qin Qi-Xu Wang zhi-Guang qin School of Information and Software Engineering University of Electronic Science and Technology of ChinaChengdu 610054

The group recommendation system is a viral requirement for the Internet service provider to provide recommendation services for all the users in a group. Due to the shared or different interests among users in the group, it is difficult for traditional personal recommendation algorithms to predict items that can meet the requirements of all the users in the group. In this paper, a random group recommendation model is proposed to recommend the top K most appealing items for all the users in a random group. By analyzing item ratings of all the users in the group, the recommendation model can abstract the group as a virtual user. Then a personal recommendation algorithm is applied to suggest the top K most appealing items for the virtual user. And the preference score and fuzzy clustering algorithm based on multiclass are applied to optimize the recommendation result of the group recommendation model. Finally, the Movie Lens-100 K dataset is applied to verify the efficiency of the recommendation model. The experimental results show that the items recommended by the proposed group recommendation model are more popular for all the users in the group than the items recommended by traditional group recommendation algorithms.

关键词： services app service

An Attribute-Based Access Control with Efficient and Secure Attribute Revocation for Cloud Data Sharing Service

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Journal of Electronic Science and Technology 2017年第1期15卷 90-98页

作者： Nyamsuren Vaanchig Wei Chen zhi-Guang qin School of Information and Software Engineering Universityof Electronic Science and Technology of ChinaChengdu 610054China

Nowadays, there is the tendency to outsource data to cloud storage servers for data sharing purposes. In fact, this makes access control for the outsourced data a challenging issue. Ciphertext-policy attribute-based encryption（CP-ABE） is a promising cryptographic solution for this challenge. It gives the data owner（DO） direct control on access policy and enforces the access policy cryptographically. However,the practical application of CP-ABE in the data sharing service also has its own inherent challenge with regard to attribute revocation. To address this challenge, we proposed an attribute-revocable CP-ABE scheme by taking advantages of the over-encryption mechanism and CP-ABE scheme and by considering the semitrusted cloud service provider（CSP） that participates in decryption processes to issue decryption tokens for authorized users. We further presented the security and performance analysis in order to assess the effectiveness of the scheme. As compared with the existing attributerevocable CP-ABE schemes, our attribute-revocable scheme is reasonably efficient and more secure to enable attribute-based access control over the outsourced data in the cloud data sharing service.

关键词： attribute cloud challenging encryption token challenge enable secret reasonably inherent

Multisymplectic Scheme for the Improved Boussinesq Equation

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Chinese Physics Letters 2013年第7期30卷 5-8页

作者： CAI Jia-Xiang qin zhi-Lin BAI Chuan-zhi School of Mathematics Science Huaiyin Normal UniversityHuai'an 223300 Jiangsu Key Laboratory for NSLSCS School of Mathematics ScienceNanjing Normal UniversityNanjing 210046

We first note that the improved Boussinesq equation has a multisymplectic *** on it,a multisymplectic scheme is *** relations analysis and linear stability analysis show that the proposed scheme has excellent *** resu... 详细信息

关键词： properties. structure. Boussinesq

Pairing-Free ID-Based Key-Insulated Signature Scheme

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Journal of Electronic Science and Technology 2015年第1期13卷 33-38页

作者： Guo-Bin Zhu Hu Xiong zhi-Guang qin School of Computer Science and Engineering University of Electronic Science and Technology of China

Without the assumption that the private keys are kept secure perfectly, cryptographic primitives cannot be deployed in the insecure environments where the key leakage is inevitable. In order to reduce the damage caused by the key exposure in the identity-based（ID-based） signature scenarios efficiently, we propose an ID-based key-insulated signature scheme in this paper, which eliminates the expensive bilinear pairing operations. Compared with the previous work, our scheme minimizes the computation cost without any extra cost. Under the discrete logarithm（DL） assumption, a security proof of our scheme in the random oracle model has also been given.

关键词： Identity-based cryptography key-insulated random oracle mode signature

Phenolic and flavonoid contents of mandarin (Citrus reticulata Blanco) fruit tissues and their antioxidant capacity as evaluated by DPPH and ABTS methods

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Journal of Integrative Agriculture 2018年第1期17卷 256-263页

作者： ZHANG Hua YANG Yi-fei ZHOU zhi-qin College of Horticulture and Landscape Architecture Southwest University College of Life Science & Engineering Chongqing Three Gorges University Key Laboratory of Horticulture for Southern Mountainous Regions Ministry of Education Laboratory of Quality & Safety Risk Assessment for Citrus Products of Ministry of Agriculture Citrus Research InstituteSouthwest University

The total phenolic and flavonoid contents in the fruit tissues （peels, pulp residues, seeds, and juices） of 19 citrus genotypes belonged to Citrus reticulata Blanco were evaluated and their antioxidant capacity was tested by 2,2-diphenyl-l-picrylhydra- zyl radicals （DPPH） method and 2,2＇-azino-bis（3-ethylbenzthiozoline-6）-sulphonic acid （ABTS） method. The total phenolic and flavonoid contents, and their antioxidant capacity varied in different citrus fruit tissues. Generally, the peel had both the highest average of total phenolics （27.18 mg gallic acid equivalent （GAE） g^-1 DW） and total flavonoids （38.97 mg rutin equivalent （RE） g^-1 DW）. The highest antioxidant capacity was also the average of DPPH value （21.92 mg vitamin C equiv- alent antioxidant capacity （VCEAC） g^-1 DW） and average of ABTS value （78.70 mg VCEAC g-1 DW） in peel. The correlation coefficient between the total phenolics and their antioxidant capacity of different citrus fruits tissues ranged from 0.079 to 0.792, and from -0.150 to 0.664 for the total flavonoids. The antioxidant capacity of fruit tissues were correlated with the total phenoilc content and flavonoid content except in case of the peel. In addition, the total phenolic content and antioxidant capacity varied in different citrus genotypes. Manju and Karamandarin were better genotypes with higher antioxidation and the phenolic content, however Shagan was the poorest genotype with lower antioxidation and the phenolic content.

关键词： Citrus L. fruit tissues phenolics/flavonoids antioxidant capacity

Heterosis and heterotic patterns of maize germplasm revealed by a multiple-hybrid population under well-watered and drought-stressed conditions

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Journal of Integrative Agriculture 2022年第9期21卷 2477-2491页

作者： SANG zhi-qin ZHANG Zhan-qin YANG Yu-xin LI zhi-wei LIU Xiao-gang XU Yun-bi LI Wei-hua Key Laboratory of Oasis Eco-Agriculture Xinjiang Production and Construction Corps/Agricultural CollegeShihezi UniversityShihezi 832003P.R.China Xinjiang Academy of Agricultural and Reclamation Science Shihezi 832000P.R.China Institute of Crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081P.R.China International Maize and Wheat Improvement Center(CIMMYT) El Batan Texcoco 56130Mexico

Understanding the heterosis in multiple environments between different heterotic groups is of fundamental importance in successful maize breeding. A total of 737 hybrids derived from 41 maize inbreds were evaluated over two years, with the aim of assessing the genetic diversity and their performance between heterotic groups under drought-stressed(DS) and well-watered(WW) treatments. A total of 38 737 SNPs were employed to assess the genetic diversity. The genetic distance(GD) between the parents ranged from 0.05 to 0.74, and the 41 inbreds were classified into five heterotic groups. According to the hybrid performance(high yield and early maturity between heterotic groups), the heterosis and heterotic patterns of Iowa Stiff Stalk Synthetic(BSSS)×Non-Stiff Stalk(NSS), NSS×Sipingtou(SPT) and BSSS×SPT were identified to be useful options in China’s maize breeding. The relative importance of general and specific combining abilities(GCA and SCA) suggests the importance of the additive genetic effects for grain yield traits under the WW treatment, but the non-additive effects under the DS treatment. At least one of the parental lines with drought tolerance and a high GCA effect would be required to achieve the ideal hybrid performance under drought conditions. GD showed a positive correlation with yield and yield heterosis in within-group hybrids over a certain range of GD. The present investigation suggests that the heterosis is due to the combined accumulation of superior genes/alleles in parents and the optimal genetic distance between parents, and that yield heterosis under DS treatment was mainly determined by the non-additive effects.

关键词： maize drought stress heterosis heterotic group heterotic pattern genetic distance

Magnetic emission intensity enhancement for amorphous alloys by constructing a multi-phase structure withα-Fe nanocrystals

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Nano Research 2024年第7期17卷 6630-6637页

作者： Ke Liu zhi qin Jie Shen zhi Cheng Shiyue You Liang Ma Jing Zhou Wen Chen State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China Sanya Science and Education Innovation Park Wuhan University of TechnologySanya 572024China Hubei Longzhong Laboratory Wuhan University of Technology Xiangyang Demonstration ZoneXiangyang 441000China

The perturbation in the magnetic field generated by the rotation or oscillation of magnetic domains in magnetic materials can emit low-frequency electromagnetic waves,which are expected to be used in low-frequency ***,the magnetic emission intensity,defined by the perturbation ability,of current commercially applied amorphous alloys,such as Metglas,cannot meet the application requirements for low-frequency antennas due to the domain motion energy ***,a multi-phase Metglas amorphous alloy was constructed by incorporatingα-Fe nanocrystals using rapid annealing to manipulate the domain *** was found that 3.89 times higher magnetic emission intensity is obtained compared to the pristine due to the synergism of the deformation and displacement ***,the low-frequency magnetic emission performance verification was carried out by preparing magnetoelectric composites as the antenna vibrator by assembling the alloy and macro piezoelectric fiber composites(MFC).Enhancements of magnetic emission intensity are found at 93.3%and 49.2%at the first and second harmonic frequencies compared with the unmodified alloy ***,the approach leads to the development of high-performance communication with a novel standard for evaluation.

关键词： multi-phase amorphous alloys magnetic emission intensity enhancing mechanism magnetic domain pinning theory Jiles-Atherton model analysis

Physiological mechanism underlying spikelet degeneration in rice

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Journal of Integrative Agriculture 2018年第7期17卷 1475-1481页

作者： WANG zhi-qin ZHANG Wei-yang YANG Jian-chang Key Laboratory of Crop Genetics and Physiology of Jiangsu Province/Innovation Center for Modern Production Technology of Grain Crops of Jiangsu Province Yangzhou University

The phenomenon of degenerated spikelets is very common in cereals, and considered as a serious physiological defect and a main constraint to grain production. Understanding the physiological mechanism in which spikelet degeneration occurs would have great significance in enhancing yield potential in grain crops. Taking rice as an example, the paper reviewed the physiological mechanism underlying spikelet degeneration, with focus on the roles of phytohormones in regulating the process. There are several hypotheses for the spikelet degeneration, such as resource limitation, self-organization, and primigenic dominance. However, convincing evidences are not enough to support the assumptions. Phytohormones including auxins, cytokinins, gibberellins, abscisic acid, and ethylene are involved in regulating spikelet degeneration in cereals. The new phytohormones of brassinosteroids and polyamines have been observed to suppress spikelet degeneration in rice. The interactions among or between plant hormones may play a more important role in regulating spikelet degeneration. However, the information on such interactions is very limited. Some agronomic practices, especially proper water and nitrogen management, could reduce spikelet degeneration but the mechanism underlying remains unclear. Further research is needed to understand the cross-talk among/between phytohormones on spikelet degeneration, to reveal the physiological and molecular mechanism in which phytohormones and their interactions regulate the degeneration of spikelets, to exploit approaches to decrease spikelet degeneration and to elucidate their mechanism.

关键词： rice(Oryza safiva) spikelet degeneration phytohormones brassinosteroids polyamines