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China Petroleum Processing & Petrochemical Technology 2014年第3期16卷 10-18页

作者： Niu Luna liu zelong Tian Songbai Research Institute of Petroleum Processing SINOPEC

The solid-phase extraction using Pd-Al2O3 as the stationary phase was employed to pre-separate the sulfur compounds in straight-run diesel. The isolating effect was evaluated quantitatively by gas chromatography with a sulfur chemiluminescence detector to harvest a satisfactory result. The identification of the structure of sulfur compounds by comprehensive two-dimensional gas chromatography coupled with the time-of-flight mass spectrometry indicated that cyclo-sulfides, benzothiophenes, dibenzothiophenes, dihydro-benzothiophenes and tetrahydro-dibenzothiophenes were included in straightrun diesel obtained from the Arab medium crude(AM). A total of 259 individual compounds were detected and their molecular structures were identified. The analytical method was approved as an effective way to characterize the composition of sulfur compounds, which reduced the interference of other compounds, facilitated the data presentation and provided more detailed information about molecular composition of sulfur compounds.

关键词： sulfur compounds straight-run diesel solid-phase extraction (SPE) comprehensive two-dimensional gas chromatographycoupled with the time-of-flight mass spectrometry (GC×GC-TOF MS)

Optimal reaction conditions for pyridine synthesis in riser reactor

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Chinese Journal of Chemical Engineering 2018年第7期26卷 1499-1507页

作者： Shuaishuai Zhou zelong liu Xiao Yan Qin Di Mengxi liu Chunxi Lu Guangzhou Jin State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China Department of Chemical Engineering Beijing Institute of Petro-Chemical Technology Beijing 102617China

Pjridine has been generally synthesized by aldehydes and ammonia in a turbulent fluidized-bed reactor. In this paper, a novel riser reactor was proposed for pyridine synthesis. Experiment result showed that the yield of pyridine and 3-picoline decreased, but the selectivity of pyridine over 3-picoline increased compared to turbulent fluidized-bed reactor. Based on experimental data, a modified kinetic model was used for the determination of optimal operating condition for riser reactor. The optimal operating condition of riser reactor given by this modified model was as follows： The reaction temperature of 755 K, catalyst to feedstock ratio （CTFR） of 87, residence timeof3.8sandinitialacetaldehydesconcentrationof0.0029mol.L-1 （acetaldehydes to formaldehydes ratio by mole （ATFR） of 0.65 and ammonia to aldehydes ratio by mole （ATAR） of 0.9, water contention of 63wt% （formaldehyde solution））.

关键词： Pyridine synthesis Riser reactor Optimal operating condition

Direct Fingerprinting Polycyclic Aromatic Hydrocarbons in Heavy Oils by PY-GC/MS and Its Application to Hydrotreating Processes

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China Petroleum Processing & Petrochemical Technology 2012年第1期14卷 8-14页

作者： Cai Xinheng liu Yingrong Tian Songbai Zhou Jian liu zelong Research Institute of Petroleum Processing SINOPECBeijing 100083

An efficient analytical method combining pyrolysis and capillary GC/MS has been developed for determination and quantitation of targeted polycyclic aromatic *** limit of detection ranged from 0.29 μg/g to 43.46 μg/g,and repeatability values were between 0.1% and 8.2% for blank spiked samples and between 0.1 % and 9.8% for real samples of heavy *** application of the proposed method in hydrotreating processes,it has been found out that heavy oils before and after the specified hydroprocessing treatment exhibited a diverse PAHs distribution which might be determined by the discrepancy in their intrinsic contents and hydrogenation ***,the hydrogenation reactivity of different polycyclic aromatic hydrocarbons was further investigated and discovered to be more interrelated to molecular structure and rings alignment or conjugation mode.

关键词： fingerprinting polycyclic aromatic hydrocarbons heavy oils PY-GC/MS hydrotreating

Boiling Point Distribution of Hydrocarbon Types in Diesel Using Solid-Phase Extraction Followed by GC/FID-EIMS

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China Petroleum Processing & Petrochemical Technology 2008年第3期10卷 13-21页

作者： Li Chengwei Tian Songbai liu zelong Zhu Xinyi Research Institute of Petroleum Processing SINOPEC Beijing 100083

In this paper, a method was established to determine the boiling point distribution of hydrocarbon types in diesel. The diesel sample was separated into the saturate and aromatic fractions by means of solid-phase extraction （SPE）, and each fraction was analyzed by GC/FID-EIMS. According to the relationship between boiling point and retention time of n-paraffins in the chromatogram, the percentages of saturates and aromatics at each temperature interval were calculated. According to the average mass spectra of the saturate and aromatic fractions at each temperature interval, the hydrocarbon types of the sample were identified through summation of characteristic mass fragments. Using this method, the changes in composition of diesel during hydrotreating process were studied. The results showed that hydrogenation of aromatics is the main reaction during the hydrotreating process. The more rings the aromatics have, the easier the hydrogenation reactions would take place. The aromatics were converted into cycloparaffins via the hydrogenation and saturation process, leading to an increase in low boiling point fractions in the hydrotreated oil.

关键词： boiling point distribution hydrocarbon type diesel GC/FID-EIMS solid-phase extraction

基于荧光光谱法探究柿原花青素与黏蛋白的相互作用机制

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食品工业科技 2025年第1期46卷 130-137页

作者：葛珍珍赵玉翔胡乔乔刘泽龙聂荣祖纵伟敬思群郑州轻工业大学食品与生物工程学院河南郑州450001 冷链食品加工与安全控制教育部重点实验室(郑州轻工业大学) 河南郑州450001 广东省粤北食药资源利用与保护重点实验室广东韶关512005

为了解黏蛋白(Mucin)对柿原花青素肠道消化释放的影响,借助激光粒度仪、差示扫描量热仪、傅里叶红外光谱、荧光光谱等技术对柿原花青素-黏蛋白复合物的理化特征及两者相互作用机制进行分析。结果表明:复合物的粒径、电位绝对值与柿原花... 详细信息

为了解黏蛋白(Mucin)对柿原花青素肠道消化释放的影响,借助激光粒度仪、差示扫描量热仪、傅里叶红外光谱、荧光光谱等技术对柿原花青素-黏蛋白复合物的理化特征及两者相互作用机制进行分析。结果表明:复合物的粒径、电位绝对值与柿原花青素及其结构单元(ECG、EGCG)的浓度呈正相关关系;柿原花青素酚羟基的引入使得黏蛋白的热稳定性、表面疏水性随其浓度的增加而减少;红外光谱显示,氢键及游离的氨基参与两者反应;柿原花青素及其结构单元可以有效猝灭黏蛋白的内源荧光,以静态猝灭为主;根据Van’t Hoff方程获得的热力学参数∆G<0,∆H<0,∆S<0,表明柿原花青素及其结构单元与黏蛋白的结合是吉布斯自由能减少的自发反应,主要由氢键及范德华力驱动。综上所述,柿原花青素及其结构单元的添加诱导黏蛋白结构发生变化,其与黏蛋白主要通过氢键和范德华力发生强烈的相互作用,该研究为设计提高柿原花青素在肠道中生物利用率的智能递送系统提供参考依据。

关键词：柿原花青素黏蛋白理化特征相互作用荧光猝灭

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Quantitative Analysis Using Fourier Transform Ion Cyclotron Resonance Mass Spectrometry and Correlation between Mass Spectrometry Data and Sulfur Content of Crude Oils

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China Petroleum Processing & Petrochemical Technology 2015年第4期17卷 71-80页

作者： Wang Wei liu Yingrong liu zelong Tian Songbai SINOPEC Research Institute of Petroleum Processing

Fourier transform ion cyclotron resonance mass spectrometry(FT-ICR MS) has become a powerful tool for analyzing the detailed composition of petroleum samples. However, the correlation between the numerous peaks obtained by FT-ICR MS and bulk properties of petroleum samples is still a challenge. In this study, the internal standard method was applied for the quantitative analysis of four straight-run vacuum gas oils(VGO) by atmospheric pressure photoionization(APPI) FT-ICR MS. The heteroatom class distribution of these VGO samples turned to be different when the concentration changed. Linear relationship between the normalized abundance and the concentration of VGO samples was identified for the total aromatic compounds, aromatic hydrocarbons, S1 and N1 species. The differences of the response factors were also discussed. The sulfur contents of a series of crude oils were proved to be linear with the FT-ICR MS data calibrated by the response factor of S1 species. This study demonstrated the feasibility of the internal standard method in quantitative analysis with APPI FT-ICR MS, and the bulk properties of petroleum samples could be correlated directly with the FT-ICR MS data.

关键词： FT-ICR MS APPI internal standard method response factor petroleomics

Linkage of Aromatic Ring Structures in Saturates, Aromatics, Resins and Asphaltenes Fractions of Vacuum Residues Determined by Collision-Induced Dissociation Technology

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China Petroleum Processing & Petrochemical Technology 2016年第1期18卷 59-65页

作者： Wang Wei liu Yingrong liu zelong Hou Huandi Tian Songbai SINOPEC Research Institute of Petroleum Processing Beijing 100083

The linkage of aromatic ring structures in vacuum residues was important for the refining process. The Fourier transform ion cyclotron resonance mass spectrometry(FT-ICR MS) combined with collision-induced dissociation(CID) is a powerful method to characterize the molecular structure of petroleum fractions. In this work, model compounds with different aromatic ring structures were measured by CID FT-ICR MS. The cracking of the parent ions and the generated fragment ions were able to distinguish different linkage of the model compounds. Then, vacuum residues were separated into saturates, aromatics, resins and asphaltenes fractions(SARA), and each fraction was characterized by CID technology. According to the experimental results, the aromatic rings in saturates and aromatics fractions were mainly of the island-type structures, while the aromatic rings in resins and asphaltenes fractions had a significant amount of archipelago-type structures.

关键词： FT-ICR MS vacuum residues SARA collision-induced dissociation(CID)

Enhanced plasma factor Ⅷ activity in mice via cysteine mutation using dual vectors

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Science China(Life Sciences) 2012年第6期55卷 521-526页

作者： ZHU FuXiang liu zelong MIAO Jing QU HuiGe CHI XiaoYan Life Science College of Ludong University Yantai 264025China

Hemophilia A is caused by a genetic mutation in coagulation factor VIII （FVIII） gene and gene therapy is considered to be a promising strategy for its treatment. We recently demonstrated that co-delivery of two vectors expressing M662C mutated heavy and D1828C mutated light chain genes of B-domain-deleted coagulation factor VIII （BDD-FVIII） leads to inter-chain disulfide cross-linking and improved heavy chain secretion in vitro. In this study, co-injection of both M662C and D1828C mutated BDD-FVIII gene expression vectors into mice resulted in increased heavy chain secretion and coagulation activity in plasma in vivo. Approximately （239＋_56） ng mL-1 above endogenous levels of transgenic FVIII heavy chain was found in mouse plasma using a chain-specific ELISA. For FVIII coagulation activity, approximately （1.09＋_0.25） IU mL-1 above en- dogenous levels were detected in co-injected transgenic mouse plasma using a chromogenic assay. These data demonstrate that inter-chain disulfide bonds likely increase heavy chain secretion and coagulation activity in the plasma of transgenic mice with an improved efficacy of a dual-vector delivery of BDD-FVIII gene. These findings support our ongoing efforts to develop a gene therapy for hemophilia A treatment using dual-AAV vectors.

关键词： coagulation factor VIII dual-vector gene delivery inter-chain disulfide bonding heavy chain secretion coagulation ac-tivity

Changes of Petroleum Acid Distribution Characterized by FT-ICR MS in Heavy Acidic Crude Oil after True Boiling Point Distillation

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China Petroleum Processing & Petrochemical Technology 2014年第1期16卷 8-12页

作者： liu Yingrong Zhang Qundan Wang Wei liu zelong Zhu Xinyi Tian Songbai Research Institute of Petroleum Processing China Petroleum & Chemical Corporation

The molecular transformations of carboxylic acids in heavy acidic SL crude before and after true boiling point distillation were examined by ultra-high resolution negative-ion electrospray ionization(ESI) Fourier transform ion cyclotron resonance mass spectrometry(FT-ICR MS). The acid class(heteroatom number), type(z numbers) and carbon number distributions were positively characterized. It was found out that the total acid number(TAN) of SL crude decreased after true boiling point distillation, and the abundance of O2 class in mass spectra was also found to be reduced from 67.6% to 34.5% in SL TBP mixed crude as measured by MS spectra, indicating to a potential carboxylic acid decomposition. However, it was interesting that the carboxylic acids type distribution in both oils was almost the same although their relative abundance in SL TBP mixed crude turned to be much lower, suggesting that various petroleum carboxylic acid types have the similar thermal decomposition reaction behavior. Furthermore, for each O2 type of acids in SL TBP mixed crude, the abundance of carboxylic acids with carbon number higher than 35 was reduced greatly, especially for those with carbon number higher than 60, the mass peaks of which were nearly totally removed, indicating that the large carboxylic acid molecules in heavy fractions decomposed more significantly because of longer heating time during the true boiling point distillation process. As a result, the reduction of TAN may be caused by the thermal decomposition of carboxylic acids especially those with high carbon number, suggesting that quick distillation or much lower pressure is required to avoid the thermal decomposition.

关键词： true boiling point distillation carboxylic acid ESI FT-ICR MS acidic crude total acid number(TAN)

Interfamily pregnancy and expression of CD57, CD68 in deciduas between golden hamster and mouse

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Chinese Science Bulletin 2003年第18期48卷 1956-1961页

作者： Xichao Wang Bojie Dai Dayuan Chen zelong liu Weimin liu Enkui Duan Chinese Acad Sci Inst Zool State Key Lab Reprod Biol Beijing 100080 Peoples R China

Pregnancy between different species is one of the key steps to interspecific somatic cell cloning. Although interspecific clone embryos have been constructed, they could not develop to birth after being transferred to recipi-ents. In order to clarify the mechanism of this phenomenon, interfamily pregnancy between golden hamste (Mesocricetus auratus) and mouse (Mus musculus) was studied. Co-culture results indicated that the adhesion ratios of golden hamster blastocysts on mouse uterine epithelia monolayer 12, 24, 48 and 72 h after co-culture were all significantly lower than those of mouse blastocysts. The outgrowth ratios of golden hamster blastocysts on mouse uterine epithelia monolayer 48, 72 h after co-culture were both significantly lower than those of mouse blastocysts (P < 0.01). Golden hamster抯 blastula could be implanted and develop to D 11 of pregnancy after being transferred to mouse uterus (the 7th day after embryo transfer). Compared to the transfer of mouse embryo to mouse uterus, the successful ratio of interfamily embryo transfer was lower and the bulk of fetus was smaller than that of intraspecific fetus. Compared to intraspecific preg-nancy of mouse, the remote decidual tissue of interfamily pregnancy on D8 is looser. At the same time, expressions of CD57 and CD 68 in remote deciduas were both higher than those in the secondary deciduas in both intraspecific and interfamily pregnancy. However, expressions of the two molecules in interfamily pregnancy were lower than those in intraspecific pregnancy. These results showed that interfam-ily pregnancy could be established between golden hamster and mouse. But the development of fetus in interfamily pregnancy was slower than that in intraspecific pregnancy. The expression difference of CD57 and CD68 indicates the difference of immunoreaction between interfamily and in-traspecific pregnancy, which may be one of the reasons lead-ing to interfamily pregnancy termination.

关键词： interfamily pregnancy golden hamster mouse CD57 CD68.