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Study on Elemental Fingerprint of Traditional Marine Chinese Medicine Oysters from Jiaozhou Bay,china

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Journal of Ocean university of china 2012年第3期11卷 397-400页

作者： zheng Yongjun zheng Kang li Yantuan Marine Drug & Food Institute Ocean University of China Qingdao 266003 P. R. China college of chemistry and Chemical Engineering Qufu Normal University Qufu 273 65 P. R. China

In order to investigate the relationship between the trace elements and the characteristics of the oysters, we analyzed the trace elements present in the germplasm of oysters from different producing areas in the Jiaozhou Bay. The element fingerprints were established to reflect the elemental characteristics of the oysters. Concentration patterns of the elements were deciphered by principle component analysis (PCA) and hierarchical cluster analysis (HCA). The six regions were discriminated with accuracy using HCA and PCA based on the concentration of 16 trace elements. The elements were viewed as characteristic elements of the oysters and the fingerprints of these elements could be used to distinguish the quality of the oysters.

关键词： traditional marine Chinese medicine oysters elemental fingerprint Jiaozhou Bay

One-pot Synthesis of 1-Aryloxyacety l-4-(4'-nitrophenyloxyacetyl)-thiosemicarbazides under Phase Transfer Catalysis and Microwave Irradiation

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Chinese Chemical Letters 2002年第8期13卷 717-720页

作者： zheng li Xi Cun WANG college of chemistry and Chemical Engineering Northwest Normal UniversityLanzhou 730070

The 1-aryloxyacetyl-4-(4-nitrophenyloxyacetyl)-thiosemicarbazides (3a-h) are synthe- sized via reaction of 4-nitrophenyloxyacetyl chloride with ammonium thiocyanate and aryloxyacetic hydrazides (2a-h) under phase tran... 详细信息

关键词： Diaryloxyacetyl thiosemicarbazide phase transfer catalysis microwave irradiation.

Nature of the Ga-Ga bonding in Na_2[Arx~*GaGaArx~*](Arx~*=C_6H_3 -2,6-(C_6H_5)_2):Electron localization function analysis

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science china.chemistry 2012年第7期55卷 1370-1376页

作者： SUN Jie MENG lingPeng zheng ShiJun SUN zheng li XiaoYan college of chemistry and Material science Hebei Normal UniversityShijiazhuang 050016China

The nature of the Ga-Ga bonding in Na2[Arx＊GaGaArx＊] （Arx＊ = C6H3-2,6-（C6Hs）2） has been investigated and compared with that of in Hz[Arx＊GaGaArx＊] using electron localization function （ELF） and orbital analysis. The calculation results show that in Na2[Arx＊GaGaArx＊], the Ga-Ga interaction is a non-classical triple bond, the heart of Na2[Arx＊GaGaArx＊] is the Ga2Na2 cluster rather than a simple Ga-Ga bond, and the contribution of the sodium atoms to the short Ga-Ga bond length is considerable. As the two sodium atoms are substituted by two hydrogen atoms, the Ga-Ga bond is replaced by two 3-center, 2-electron （3c-2e） Ga-H-Ga covalent bridged bonding.

关键词： Ga-Ga bonding electron localization function hydrogen bridged bond

A triple-combination nanotechnology platform based on multifunctional RNA hydrogel for lung cancer therapy

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science china.chemistry 2020年第4期63卷 546-553页

作者： Junwei li Dandan Yuan Xiangjiang zheng Xinyue Zhang Xuemei li Shusheng Zhang Collaborative Innovation Center of Tumor Marker Detection Technology Equipment and Diagnosis-Therapy Integration in Universities of ShandongShandong Province Key Laboratoty of Detection Technology for Tumor MakersSchool of Chemistry and Chemical EngineeringLinyi UniversityLinyi 276005China college of chemistry Chemical Engineering and Materials ScienceCooperative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of ShandongShandong Normal UniversityJinan 250014China

Conventional cancer combination therapy usually involves systemic delivery of anticancer drugs which may lead to the destruction of normal cells and physiological toxicity due to the lack of targeting ability and toxicity of drug carriers. In the present study, a triple combination nanosystem of gene therapy, chemotherapy and phototherapy delivered by multifunctional RNA nanohydrogels(RNA NHs) was established. By taking the advantages of DNA nanotechnology and rolling circle transcription(RCT), three lung cancer inhibitor microRNA(let-7 a, microRNA 34 a, microRNA 145) hairpins were integrated in one RNA NH nanoparticle, leading to the simultaneous silencing of three targeted m RNAs. Meanwhile, RNA NH carried doxorubicin(DOX, a chemotherapy drug) as well as 5,10,15,20-tetrakis(1-methylpyridinium-4-yl) porphyrin(TMPyP4, a photosensitizer) and delivered these drugs to cancer cells. It was demonstrated that lung cancer inhibitor microRNAs integrated in RNA NHs, DOX and TMPyP4 could play a synergistic anti-cancer role in multi-drug resistance cancer cells. Under the action of aptamer sequence S6 that was modified with cholesterol, the resulting RNA NHs were condensed to feasible size without the assistance of polyelectrolyte condensation reagents and showed cancer-specific cellular targeting. Subsequently, thousands of copies of miRNA together with chemotherapy drug as well as photosensitizer were delivered to cancer cells specifically, and an ideal synergistic treatment effect was achieved in vivo, thus playing a combined role of gene therapy, chemotherapy and phototherapy. Through this study, it can be concluded that the triple combination therapy nanosystem can overcome the multidrug resistance caused by the malfunction of genes in chemotherapy and shows a great potential in the field of multifunctional synergistic cancer treatment.

关键词： RNA nanohydrogel phototherapy drug delivery gene therapy lung cancer

Green synthesis of novel conjugated poly(perylene diimide)as cathode with stable sodium storage

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Nano Research 2023年第7期16卷 9538-9545页

作者： Jinyun zheng Xinxin liu Wenbin li Wenjie li Xiangming Feng Weihua Chen college of chemistry&Green Catalysis Center Zhengzhou UniversityZhengzhou 450001China

Conjugated polymers of organic carbonyl compounds are promising electrode materials for energy storage devices owing to the renewable development prospects,structural variability,and better insolubility in ***,the synthesis methods in solution are cumbersome and complicated in separation and purification,and require the introduction of functional groups and use of expensive *** this work,a novel conjugated poly(3,4,9,10-perylenetetracarboxylic diimide)(PPI)with superior thermal stability and lower solubility was prepared successfully by a green facile mechanical ball milling *** PPI exhibits enhanced electrochemical dynamics performance,preferable rate capability,higher discharge capacity,and excellent cycling stability of 450 cycles at 0.2 C with higher capacity retention of 85.7%when used as cathode material for sodium-ion ***,the in-situ X-ray diffraction(XRD)and in-situ Raman investigations combined with the Fourier transform infrared(FT-IR)and X-ray photoelectron spectroscopy(XPS)were carried out to investigate the sodium storage *** results indicate that only two sodium ions are bound to two opposite carbonyl groups of PPI monomer to form sodium enolates during normal charging and discharging and to deliver available reversible capacity.

关键词： sodium-ion battery organic cathode carbonyl compound stability green synthesis

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泸州市城区空气质量时空变化分析

四川理工学院学报（自然科学版） 2011年第5期24卷 614-617页

作者：李友平程正军西华师范大学化学化工学院四川南充637009

为了掌握泸州市城区近年空气质量时空变化,对泸州市城区2004-2009年空气质量监测数据进行系统分析。结果表明,近年来泸州市城区空气质量总体良好,平均空气污染指数为80,空气质量优良率在72.33%以上。空气质量有逐步好转的趋势,SO2和PM1... 详细信息

为了掌握泸州市城区近年空气质量时空变化,对泸州市城区2004-2009年空气质量监测数据进行系统分析。结果表明,近年来泸州市城区空气质量总体良好,平均空气污染指数为80,空气质量优良率在72.33%以上。空气质量有逐步好转的趋势,SO2和PM10年平均浓度明显下降,分别从0.110 mg/m3、0.120 mg/m3下降到0.058 mg/m3、0.070 mg/m3;NO2略有上升,从0.029 mg/m3上升到0.040 mg/m3。污染物浓度时空分布不均,SO2与PM10夏季浓度较低,冬季较高,NO2浓度季节性变化不明显;兰田宪桥、小市上码头污染物浓度总体上高于忠山环监站。

关键词：空气质量颗粒物 SO2 NO2 泸州市

Hydrocyanation of Unsaturated Imines Using Potassium Hexacyanoferrate(Ⅱ) as a Cyanide Source

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中国化学:英文版 2014年第12期32卷 1251-1254页

作者： zheng li Fei Wen Jingya Yang college of chemistry and Chemical Engineering Northwest Normal UniversityLanzhouGansu 730070China

An efficient method for the hydrocyanation of unsaturated imines to synthesizeβ,γ-unsaturatedα-aminonitriles by a one-pot two-step procedure using potassium hexacyanoferrate(Ⅱ)as a cyanide source and benzoyl chloride as a promoter under catalyst-free condition is *** advantages of this protocol are the use of a nontoxic,nonvolatile and inexpensive cyanating agent,no use of transition metal catalysts,high yield and simple work-up procedure.

关键词： hydrocyanation potassium hexacyanoferrate(Ⅱ) nucleophilic addition