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Study on copper complexing ligand concentrations in several China's coastal waters

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Acta Oceanologica Sinica 2006年第1期25卷 64-77页

作者： GONG haidong ZHANG Zhengbin liu Chunying liu Liansheng Institute of Marine Chemistry College of Chemistry and Chemical Engineering Ocean University of China Qingdao 266003 China

Copper complexing ligand concentrations in the Daya Bay, Qingdao coast, Jiaozhou Bay, South China Sea and Huanghe Estuary waters were determined by the anodic stripping voltammetry technique. The distribution regularity and the relationship with other parameters were discussed. The results were as follows： Copper complexing ligand concentrations of the South China Sea were a little higher than those of other sea areas, and they were apparently higher than those of the ocean. Compared with the subsurface layer （SSL） in the sea surface microlayer copper complexing ligand concentrations showed an enrichment phenomenon, of which the mechanism is similar to dissolved organic matter. The metal complexing ligand concentration profiles of the South China Sea showed that the value in the sea surface was the highest, then it decreased with depth accruing, and a higher value appeared at the bottom. Copper complex- ing ligand concentrations were higher than those of cadmium and lead. Ligands in each sea area exhibited a complicated property. In short, the distribution regularity of copper complexing ligand concentrations in China＇s coastal waters was consistent with that of other regions in the world. Meanwhile, the positive relationship between the copper complexing ligand concentrations and biological oxygen demand, chemical oxygen demand, dissolved organic carbon, and viscosity were found clearly.

关键词： copper complexing ligand concentrations China' s coastal waters distribution regularity relationship

Stochastic dynamics of the delayed chemostat with Levy noises

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International Journal of Biomathematics 2019年第5期12卷 171-202页

作者： Dinnli Zhao Sanling Yuan haidong liu College of Science University of Shanghai for Science and Technology Shanghai 200093 P.R.China School of Mathematical Sciences Qufu Normal University Qufu 273165 P.R.China

This paper formulates and studies a delayed ehemostat with Levy *** of the glohally positive solution is proved first by establishing suitable Lyapunov functions,and a further result on exact Lyapunov exponent shows the growth of the total concentration in the ***,we prove existence of the uniquely ergodic stationary distribution for a subsystem of the nutrient,based on this,a unique threshold is identified,which completely determines persistence or not of the microorganism in the ***,recurrence is studied under special conditions in case that the microorganism *** indicate that all the noises have negative effects on persistence of the microorganism,and the time delay has almost no effects on the sample Lyapunov exponent and the threshold value of the ehemostat.

关键词： Delayed ehemostat models Ldvy noises sample Lyapunov exponents thresh-old recurrence

The SML pump of carbon cycles in oceans

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Science China Chemistry 2006年第2期49卷 126-132页

作者： ZHANG Zhengbin GONG haidong liu Liansheng ZHANG Chuang Institute of Marine Chemistry Ocean University of China Qingdao 266003 China Institute of Marine Chemistry Ocean University of China Qingdao 266003 China Institute of Marine Chemistry Ocean University of China Qingdao 266003 China Institute of Marine Chemistry Ocean University of China Qingdao 266003 China

Different from the solution/physical pump, biological pump and continental shelf pump of carbon cycle in oceans, a new pump named “surface microlayer (SML) pump” is developed based on data obtained from marine investigations and lab study. The SML pump has: (1) left-right dissymmetry of “pH-depth” curve; (2) the non-linearity of “concentration-depth” curve; and (3) difference of affect-ing confine of the SML pump. The issue of “source” or “sink” of atmospheric CO2 in the Yellow Sea and South China Sea is discussed.

关键词： carbon cycles in oceans, SML pump, three deductions, the Yellow Sea and South China Sea, 'source' or 'sink' of atmospheric CO2.

SNORA23 inhibits HCC tumorigenesis by impairing the 2'-O-ribose methylation level of 28S rRNA

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Cancer Biology & Medicine 2022年第1期19卷 104-119页

作者： Zhiyong liu Yanan Pang Yin Jia Qin Qin Rui Wang Wei Li Jie Jing haidong liu Shanrong liu Department of Laboratory Diagnostics Changhai HospitalSecond Military Medical UniversityShanghai 200433China Department of Gastroenterology and Hepatology Zhongshan HospitalFudan UniversityShanghai 200032China Department of Gastroenterology Changhai HospitalSecond Military Medical UniversityShanghai 200433China Shanghai Institute of Pancreatic Diseases Shanghai 200433China Department of Chemistry and State Key Laboratory of Molecular Engineering of Polymers Fudan UniversityShanghai 200433 China Department of General Surgery Changzheng HospitalSecond Military Medical UniversityShanghai 200433China Shanghai Fourth People’s Hospital Tongji University School of MedicineShanghai 200081China

Objective:The dysregulation of ribosome biogenesis is associated with the progression of numerous tumors,including hepatocellular carcinoma(HCC).Small nucleolar RNAs(sno RNAs)regulate ribosome biogenesis by guiding the modification of ribosomal RNAs(r RNAs).However,the underlying mechanism of this process in HCC remains ***:RNA immunoprecipitation and sequencing were used to analyze RNAs targeted by ribosome *** biological functions of SNORA23 were examined in HCC cells and a xenograft mouse *** elucidate the underlying mechanisms,the 2′-O-ribose methylation level of r RNAs was evaluated by q PCR,and the key proteins in the PI3 K/Akt/m TOR pathway were detected using Western ***:Twelve sno RNAs were found to co-exist in 4 cancer cell lines using RPS6 pull-down ***23 was downregulated in HCC and correlated with the poor prognoses of HCC ***23 inhibited the proliferation,migration,and invasion of HCC cells both in vitro and in *** also found that SNORA23 regulated ribosome biogenesis by impairing 2′-O-ribose methylation of cytidine4506 of 28 S r ***,SNORA23,which is regulated by the PI3 K/Akt/m TOR signaling pathway,significantly inhibited the phosphorylation of 4 E binding protein ***23 and rapamycin blocked the PI3 K/AKT/m TOR signaling pathway and impaired HCC growth in ***:SNORA23 exhibited antitumor effects in HCC and together with rapamycin,provided a promising therapeutic strategy for HCC treatment.

关键词： SNORA23 ribosome biogenesis rRNA methylation HCC

Rhodium-Catalyzed C(sp^(3))–H Arylation of 8-Methylquinolines with Arylsilanes

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Chinese Journal of Chemistry 2024年第21期42卷 2627-2632页

作者： Lin Li haidong liu Yupeng Qian Guohong Shen Yun Shi Jiajie Du Haiqing Luo Department of Chemistry&Chemical Engineering Gannan Normal UniveristyGanzhouJiangxi341000 China

We herein describe a Cp^(*)Rh^(Ⅲ)-catalyzed C(sp^(3))–H mono-arylation of 8-methylquinolines with benign *** use of 1-adamantane carboxylic acid can benefit the efficiency in this transformation,and AgF was both act... 详细信息

关键词： C(sp^(3))-H arylation C-H activation Arylsilanes Cross-coupling Nitrogen heterocycles

Acylation of nitriles to β-ketonitriles catalyzed by a heterometallic alkoxide cluster of neodymium and sodium:NdNa_8(O^tBu)_(10)(OH)

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Chinese Science Bulletin 2011年第13期56卷 1357-1360页

作者： liu haidong LI Lan SHENG HongTing ZHU XueHua XU Fan SHEN Qi Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou 215123 China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China

Catalytic acylation of nitriles with esters in the presence of 10 mol% NdNa8(OtBu)10(OH) is *** procedure is suitable for both enolizable and nonenolizable esters and affords β-ketonitriles in moderate to high *** heterometallic alkoxide cluster NdNa8(OtBu)10(OH) is structurally characterized by X-ray diffraction,and a mechanism for the production of β-ketonitriles using the cluster is proposed and verified.

关键词：催化酰化集群腈醇结构特征射线衍射生产机制

Hash-Based Signature for Flexibility Authentication of IoT Devices

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Wuhan University Journal of Natural Sciences 2022年第1期27卷 1-10页

作者： HAN Songshen XU Kaiyong ZHU Zhiqiang GUO Songhui liu haidong LI Zuohui Graduate School Information Engineering UniversityZhengzhou 450001HenanChina 722nd Research Institute China Shipbuilding GroupWuhan 430079HubeiChina

5G provides a unified authentication architecture and access management for IoT(Internet of Things)*** existing authentication services cannot cover massive IoT devices with various computing *** addition,with the development of quantum computing,authentication schemes based on traditional digital signature technology may not be as secure as we *** paper studies the authentication mechanism from the user equipment to the external data network in 5G and proposed an authentication protocol prototype that conforms to the Third Generation Partnership Program(3GPP)*** prototype can accommodate various Hash-based signature technologies,applying their advantages in resource consumption to meet the authentication requirements of multiple types of IoT *** operation of the proposed authentication scheme is mainly based on the Hash function,which is more efficient than the traditional authentication *** provides flexible and high-quality authentication services for IoT devices cluster in the 5G environment combining the advantages of Hash-based signature technology and 5G architecture.

关键词： Hash-based signature secondary authentication IoT device cluster 5G

Enhanced electrochemical performance in lithium ion batteries of a hollow spherical lithium-rich cathode material synthesized by a molten salt method

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Nano Research 2014年第1期7卷 110-118页

作者： Xin He Jun Wang Richard Kloepsch Steffen Krueger Haiping Jia haidong liu Britta Vortmann Jie Li MEET Battery Research Center/Institute of Physical Chemistry University of Muenster Corrensstrasse 46 D-48149 Muenster Germany

A high voltage layered Li1.2Ni0.16Co0.08Mn0.56O2 cathode material with a hollow spherical structure has been synthesized by molten-salt method in a NaCI flux. Characterization by X-ray diffraction and scanning electron microscopy confirmed its structure and proved that the as-prepared powder is constituted of small, homogenously sized hollow spheres （1-1.5 μm）. The material exhibited enhanced rate capability and high first cycle efficiency due to the good dispersion of secondary particles. Galvanostatic cycling at different temperatures （20, 40, and 60 ℃） and a current rate of 2 C （500 mA.g-1） showed no significant capacity fade.

关键词： Li-rich cathode nano hollow sphere molten salt synthesis electrochemicalperformance lithium ion batteries

Microcavity assisted graphene pressure sensor for single-vessel local blood pressure monitoring

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Nano Research 2024年第11期17卷 10058-10068页

作者： Jinan Luo Jingzhi Wu Xiaopeng Zheng Haoran Xiong Lin Lin Chang liu haidong liu Hao Tang Houfang liu Fei Han Zhiyuan liu Zhikang Deng Chuting liu Tianrui Cui Bo Li Tian-Ling Ren Jianhua Zhou Yancong Qiao School of Biomedical Engineering Shenzhen Campus of Sun Yat-sen University Shenzhen 518107 China Key Laboratory of Sensing Technology and Biomedical Instruments of Guangdong Province School of Biomedical Engineering Sun Yat-sen University Guangzhou 510275 China School of Integrated Circuits and Beijing National Research Center for Information Science and Technology (BNRist) Tsinghua University Beijing 100084 China CAS Key Laboratory of Human-Machine Intelligence-Synergy Systems Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences (CAS) Shenzhen 518055 China Cardiovascular surgery Seventh affiliated Hospital of Sun Yat-sen University Shenzhen 518107 China

Dynamic monitoring of blood pressure (BP) is beneficial to obtain comprehensive cardiovascular information of patients throughout the day. However, the clinical BP measurement method relies on wearing a bulky cuff, which limits the long-term monitoring and control of BP. In this work, a microcavity assisted graphene pressure sensor (MAGPS) for single-vessel local BP monitoring is designed to replace the cuff. The microcavity structure increases the working range of the sensor by gas pressure buffering. Therefore, the MAGPS achieves a wide linear response of 0–1050 kPa and sensitivity of 15.4 kPa^(−1). The large working range and the microcavity structure enable the sensor to fully meet the requirements of BP detection at the radial artery. A database of 228 BP data (60-s data fragment detected by MAGPS) and 11,804 pulse waves from 9 healthy subjects and 5 hypertensive subjects is built. Finally, the BP was detected and analyzed automatically by combining MAGPS and a two-stage convolutional neural network algorithm. For the BP detection method at local radial artery, the first stage algorithm first determines whether the subject has hypertension by the pulse wave. Then, the second stage algorithm can diagnose systolic and diastolic BP with the accuracy of 93.5% and 97.8% within a 10 mmHg error, respectively. This work demonstrates a new BP detection method based on single vessel, which greatly promotes the efficiency of BP detection.

关键词： graphene pressure sensor microcavity assisted pressure sensor single-vessel BP monitoring two-stage neural network algorithm