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Crayfish Shell Waste as Safe Biosorbent for Removal of Cu^(2+)and Pb^(2+)from Synthetic Wastewater

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Chinese Journal of Chemical Physics 2022年第5期35卷 842-852,I0030-I0033,I0013页

作者： wan-qun hu Shuo Chen Hong Jiang CAS Key Laboratory of Urban Pollutants Conversion Department of Applied ChemistryUniversity of Science and Technology of ChinaHefei 230026China

Crayfish shell is an abundant natural waste and is also a potential biosorbent for pollutants,especially,heavy *** this study,the safety of the use of crayfish shell as a biosorbent was first assessed by release experiments involving primary heavy metal ions,such as Cu^(2+),Zn^(2+),and Cr^(3+),in aqueous solution under different environmental *** release concentrations of heavy metals were dependent on pH,ionic strength,and humic acid;and the maximum release concentrations of heavy metals were still lower than the national ***,Cu^(2+) and Pb^(2+) removal by crayfish shell in synthetic wastewater was *** removal process involved biosorption,precipitation,and complexation,and the results indicate that crayfish shell is an excellent biosorbent for Cu^(2+) and Pb^(2+) *** precipitation step is particularly dependent on Ca species,pH,and *** maximum removal capacities of Pb^(2+) and Cu^(2+) were 676.20 and 119.98 mg/g,*** related precipitates and the generated complex products include Cu_(2)CO_(3)(OH)_(2),Ca_(2)CuO_(3),CuCO_(3),Pb_(2)CO_(3)(OH)_(2),CaPb_(3)O_(4),and PbCO_(3).

关键词： Crayfish shell Biosorption Safety Precipitation Complexation Heavy metal ions

Intron-Targeted Intron-Exon Splice Conjunction (IT-ISJ) Marker and Its Application in Construction of Upland Cotton Linkage Map

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Agricultural Sciences in China 2008年第10期7卷 1172-1180页

作者： ZHENG Jing ZHANG Zheng-sheng CHEN Li wan qun hu Mei-chun wanG Wei ZHANG Ke LIU Da-jun CHEN Xiao WEI Xin-qi Key Laboratory of Biotechnology ＆ Crop Quality Improvement Ministry of Agriculture/Southwest University Chongqing 400716 P.R.China

To develop a new DNA maker, which could be used in genetic diversity analysis and genetic map construction in plants, IT-ISJ （intron targeted intron-exon splice junction） primer combinations, which were designed according to the intronexon splice junction conserved sequences, were used to construct cotton genetic linkage map in the present study. 49 out of 704 IT-ISJ primer combinations showed polymorphism between upland cotton high quality cultivar Yumian 1 and multiple dominant gene line T586, and the polymorphic primer combinations accounted for 7.0% of total primer combinations. 49 IT-ISJ primer combinations were used to genotype 270 F2：7 recombinant inbred lines developed from （Yumian 1 × T586） F2, and 58 IT-ISJ loci were obtained. 58 IT-ISJ, together with 150 SSR and 8 morphological loci, were used to conduct linkage analysis, and a linkage map including 22 linkage groups and 113 loci （49 IT-ISJ, 62 SSR, and 2 morphological loci） was constructed. The linkage map covered 714.5 cM with an average interval of 6.3 cM between two markers, accounting for 16.1% of cotton genome. The present study demonstrated that the polymorphism of IT-ISJ marker is high, and it could be effectively applied in plant genetic map construction.

关键词： IT-ISJ (intron targeted intron-exon splice junction) linkage map upland cotton (Gossypium hirsutum L.)

Quantum public-key crypto via EPR pairs

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 58-63页

作者： Xiang-qun Fu Hong-Wei Li Jian-Hong Shi Tan Li wan-Su Bao Henan Key Laboratory of Quantum Information and Cryptography Information Engineering University Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of China

With the development of quantum computing technology, quantum public-key cryptography is gradually becoming an alternative to the existing classical public-key cryptography. This paper designs a quantum trapdoor one-way function via EPR pairs and quantum measurements. Based on this, a new quantum public-key cryptosystem is presented, which offers forward security,and can resist the chosen-plaintext attack and chosen-ciphertext attack. Compared with the existing quantum public-key cryptos,eavesdropping can be automatically detected in this new quantum public-key cryptosystem under a necessary condition, which is also detailed in the paper.

关键词： quantum public-key crypto trapdoor one-way function EPR pairs

Preparation of a Cellulose-Derived Carbon-Based Solid Acid Catalyst for Esterification

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Preparation of a Cellulose-Derived Carbon-Based Solid Acid C...

Robust location algorithm for NLOS environments

加速功能材料自主创新，促进西部战略性新兴产业发展——2011中国功能材料科技与产业高层论坛

作者： Zhenwu FU,hui wan,Xiaoshuang hu,qun CUI,Guofeng GUAN College of Chemistry and Chemical Engineering Nanjing University of Technology,Nanjing,China,210009

A carbon-based solid acid catalyst is prepared by incomplete carbonization of pulp fibers followed by ***,FT-IR and acid density tests are employed to characterize the structure and performance of the *** results show that the catalyst is an amorphous carbon composed of aromatic carbon sheets with-COOH,-OH and-SO3H *** catalyst exhibits excellent catalytic activity for the esterification of acetic ***,the catalyst has good thermal stability and reusability.

关键词： carbon-based solid acid pulp fibers amorphous carbon esterification

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Journal of Systems Engineering and Electronics 2008年第4期19卷 812-818页

作者： huang Jiyan wan qun Dept of Electronic Engineering Univ. of Electronic Science and Technology of China Chengdu 610054 P. R. China

One of the main problems facing accurate location in wireless communication systems is non-line-of- sight （NLOS） propagation. Traditional location algorithms are based on classical techniques under minimizing a least-squares objective function and it loses optimality when the NLOS error distribution deviates from Gaussian distribution. An effective location algorithm based on a robust objective function is proposed to mitigate NLOS errors. The proposed method does not require the prior knowledge of the NLOS error distribution and can give a closed-form solution. A comparison is performed in different NLOS environments between the proposed algorithm and two additional ones （LS method and Chan＇s method with an NLOS correction）. The proposed algorithm clearly outperforms the other two.

关键词： wireless location time-of-arrival non-line-of-sight robust objective function

Sources of calcium in agonist-induced contraction of rat distal colon smooth muscle in vitro

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World Journal of Gastroenterology 2008年第7期14卷 1077-1083页

作者： hua Zhou De-hu Kong qun-wan Pan Hai-hua wang Department of Physiology Wannan Medical College Wuhu 241000 Anhui Province China Department of Physiology Anhui Medical University Hefei 230032 Anhui Province China

AIM: To study the origin of calcium necessary for agonist-induced contraction of the distal colon in ***: The change in intracellular calcium concentration ([Ca2+]i) evoked by elevating external Ca2+ was detected by fura 2/AM fluorescence. Contractile activity was measured with a force displacement transducer. Tension was continuously monitored and recorded using a Powerlab 4/25T data acquisition system with an ML110 bridge bioelectric physiographic ***: Store depletion induced Ca2+ influx had an effect on [Ca2+]i. In nominally Ca2+-free medium, the sarco-endoplasmic reticulum Ca2+-ATPase inhibitor thapsigargin (1 μmol/L) increased [Ca2+]i from 68 to 241 nmol/L, and to 458 (P < 0.01) and 1006 nmol/L (P < 0.01), respectively, when 1.5 mmol/L and 3.0 mmol/L extracellular Ca2+ was reintroduced. Furthermore, the change in [Ca2+]i was observed with verapamil (5 μmol/L), La3+ (1 mmol/L) or KCl (40 mmol/L) in the bathing solution. These channels were sensitive to La3+ (P < 0.01), insensitive to verapamil, and voltage independent. In isolated distal colons we found that in normal Krebs solution, contraction induced by acetylcholine (ACh) was partially inhibited by verapamil, and the inhibitory rate was 41% (P < 0.05). On the other hand, in Ca2+-free Krebs solution, ACh induced transient contraction due to Ca2+ release from the intracellular stores. The transient contraction lasted until the Ca2+ store was depleted. Restoration of extracellular Ca2+ in the presence of atropine produced contraction, mainly due to Ca2+ influx. Such contraction was not inhibited by verapamil, but was decreased by La3+ (50 μmol/L) from 0.96 to 0.72 g (P < 0.01). CONCLUSION: The predominant source of activator Ca2+ for the contractile response to agonist is extracellular Ca2+, and intracellular Ca2+ has little role to play in mediating excitation-contraction coupling by agonists in rat distal colon smooth muscle in vitro. The influx of extracellular Ca2+ is mainly mediated

关键词： Distal colon Source of Ca^2+ Storeoperated Ca^2+ channel Voltage-operated Ca^2+ channel Acetylcholine

A theoretical framework for quantum image representation and data loading scheme

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Science China(Information Sciences) 2014年第3期57卷 101-111页

作者： hu BenQiong huANG XuDong ZHOU RiGui WEI YanYu wan qun PANG ChaoYang College of Management Science Chengdu University of Technology Neurochemistry Laboratory Department of PsychiatryMassachusetts General Hospital and Harvard Medical School College of Information Engineering East China JiaoTong University Vacuum Electronics National Laboratory School of Physical ElectronicsUniversity of Electronic Science and Technology of China Department of Electronic Engineering University of Electronic Science and Technology of China Group of Gene Computation College of Computer ScienceSichuan Normal University

Two fundamental problems exist in the use of quantum computation to process an image or *** first one is how to represent giant data,such as image data,using quantum state without losing *** second one is how to load a colossal volume of data into the quantum registers of a quantum CPU from classical electronic *** on these two questions are rarely *** an entangled state is used to represent an image(or vector)for which two entangled registers are used to store a vector component and its classical *** the representation,n1+n2+8 qubits are used to store the whole information of the gray image that has a 2n1×2n2 size at a superposition of states,a feat is not possible with a classic *** way of designing a unitary operation to load data,such as a vector(or image),into the quantum registers of a quantum CPU from electronic memory is defined herein as a quantum loading scheme(QLS).In this paper,the QLS with time complexity O(log2N)is presented where N denotes the number of vector components,a solution that would break through the efciency bottleneck of loading *** would enable a quantum CPU to be compatible with electronic memory and make possible quantum image compression and quantum signal processing that has classical input and output.

关键词： quantum image representation path interference entangled state quantum loading scheme

Joint DOA and time delay estimation method for space-time coherent distributed signals based on search

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Journal of Systems Engineering and Electronics 2007年第2期18卷 341-346页

作者： Qian Bin Yang wanlin wan qun Coll. of Electronic Engineering Univ. of Electronic Science and Technology of China Chengdu 610054 P.R. China

Under dense urban fading environment, performance of joint multi-path parameter estimation method based on traditional point signal model degrades seriously. In this paper, a new space and time signal model based on multipath distribution function is given after new space and time manifold is reconstructed. Then joint spacetime signal subspace is obtained by converting acquired channel from time domain to frequency domain .Then space and time spectrum is formulated by the space sub-matrix and time sub-matrix taken out of joint space-time signal subspace, and parameters are estimated by searching the minimum eigenvalues of the space matrix and the time matrix. Lastly, A space and time parameters matching process is performed by using the orthogonal property between joint noise subspace and the space-time manifold. In contrast with tradition MUSIC, the algorithm we present here only need two 1- dimension searching and was not sensitive to different distribution function.

关键词： Space-time coherent distribution DOA Relative time delay Minimum eigenvalue.

Role of microRNA-7 in digestive system malignancy

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World Journal of Gastrointestinal Oncology 2016年第1期8卷 121-127页

作者： wan-qun chen ling hu geng-xin chen hai-xia deng guangdong provincial hospital of chinese medicine Guangzhou 510120Guangdong ProvinceChina institute of gastroenterology guangzhou university of chinese medicineGuangzhou 510004Guangdong ProvinceChina guangdong provincial hospital of chinese medicine guangdong provincial key laboratory of clinical research on traditional chinese medicine syndromeGuangzhou 510120Guangdong ProvinceChina

There are several malignancies of the digestive system(including gastric, pancreatic and colorectal cancers, and hepatocellular carcinoma), which are the most common types of cancer and a major cause of death worldwide. MicroRNA(miR)-7 is abundant in the pancreas, playing an important role in pancreatic development and endocrine function. Expression of miR-7 is downregulated in digestive system malignancies compared with normal tissue. Although there are contrasting results for miR-7 expression, almost all research reveals that miR-7 is a tumor suppressor, by targeting various genes in specific pathways. Moreover, miR-7 can target different genes simultaneously in different malignancies of the digestive system. By acting on many cytokines, miR-7 is also involved in many gastrointestinal inflammatory diseases as a significant carcinogenic factor. Consequently, miR-7 might be a biomarker or therapeutic target gene in digestive system malignancies.

关键词： MicroRNA-7 Digestive system malignancy Tumor biomarker Target gene Inflammation