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Effects of working parameters on gasoline engine exergy balance

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Journal of Central South University 2013年第7期20卷 1938-1946页

作者： LIU Jing-ping fu jian-qin FENG Ren-hua ZHU Guo-hui Research Center for Advanced Powertrain Technology Hunan University Changsha 410082 China State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body (Hunan University) Changsha 410082 China

To improve the energy utilization efficiency of internal combustion （IC） engine, exergy analysis was conducted on a passenger car gasoline engine. According to the thermodynamic theory of IC engine, in-cylinder exergy balance model was built. The working processes of gasoline engine were simulated by using the GT-power. In this way, the required parameters were calculated and then gasoline engine exergy balance was obtained by programming on computer. On this basis, the influences of various parameters on exergy balance were analyzed. Results show that, the proportions of various forms of exergy in gasoline engine from high to low are irreversible loss, effective work, exhaust gas exergy and heat transfer exergy. Effective exergy proportion fluctuates with cylinder volumetric efficiency at full load, while it always increases with break mean effective pressure （BMEP） at part load. Exhaust gas exergy proportion is more sensitive to speed, and it increases with speed increasing except at the highest speed. The lower proportion of heat transfer exergy appears at high speed and high load. Irreversible loss is mainly influenced by load. At part load, higher BMEP results in lower proportion of irreversible loss; at full load, the proportion of irreversible loss changes little except at the highest speed.

关键词： gasoline engine exergy balance waste heat recovery thermal efficiency energy conservation

Study of magneto-optical effects in γ-Fe_2O_3/ZnFe_2O_4 nanoparticle ferrofluids, using circularly polarized light

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Science China(Physics,Mechanics & Astronomy) 2012年第8期55卷 1404-1411页

作者： fu Jun LI jian LIN YueQiang LIU XiaoDong MIAO hua LIN Lihua School of Physical Science & Technology MOE Key Laboratory on Luminescence and Real-Time Analysis Southwest University Chongqing 400715 China

When circularly polarized light travels through a ferrofluid film in the presence of an applied magnetic field, the transmitted light will behave as elliptically polarized light, because of magnetic birefringence and dichroism. The angular distribution of the relative intensity of the transmitted light can be obtained using a polarizer, so that the ratio of both the long and short ax- es-as well as the orientation angle of the ellipse, corresponding to the direction of the applied magnetic field--can be deter- mined, and whether the ferrofluids samples are stable during the measurement can be directly judged from the shape of the distribution curves. Thus, the ratio of the amplitudes Ax/Ay and the added phase difference A r can be resolved in the elliptically polarized light, and information on both the magnetic birefringence An and the dichroism Ak can be deduced for the ferrofluid sample. From the orientation angles of both right-handed and left-handed elliptically polarized transmitted light, the direction of the applied magnetic field can be accurately determined. Using circularly polarized light, the magnetic birefringence and dichroism of pure γ-Fe2O3 ferrofluids and γ--Fe2O3/ZnFe2O4 binary ferrofluids were studied. For the binary ferrofluids, a mod- ulating effect on the magnetic birefringence and dichroism was revealed.

关键词： ferrofluids polarization birefringence dichroism

Low temperature purification method for the determination of abamectin and ivermectin in edible oils by liquid chromatographytandem mass spectrometry

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Chinese Chemical Letters 2014年第4期25卷 635-639页

作者： jian-Xiang huang Da-Hai Lu Kai Wan fu-hua Wang Public Monitoring Center for Agro-Product Guangdong Academy of Agricultural Sciences

In this study, a method based on low temperature purification （LTP） coupled with liquid chromatography-tandem mass spectrometry （LC-MS/MS） was developed for the determination of abamectin （ABA） and ivermectin （IVR） in edible oils. ABA and IVR were extracted using conventional liquid-liquid extraction followed by purification via precipitation of interfering fatty components at low temperature without an additional cleanup step. LTP is simple, easy to use, labour-saving and cost effective, and requires reduced amounts of organic solvent. The linear ranges of ABA and IVR were 5- 1000 t^g/L using matrix-matched standards. Limits of detection （LOD） and limits of quantification （LOQ） were in the range of 0.1-0.4 i^g/kg and 0.3-1.3 p^g/kg, respectively. The LOQs were below the strictest maximum residue limits established by Codex Alimentarius Commission. Recoveries at three spiked levels of 10, 20 and 100 i^g/kg in peanut oil, corn oil, olive oil, soybean oil and lard ranged from 71.1% to 119.3% with relative standard deviations of 3.2%-10.3%, which were in agreement with those obtained by the solid phase extraction method. The proposed method was utilized in the analysis of 10 edible oil samples from local market and neither ABA nor IVR was detected. As far as we know, this is the first time that LTP is applied to the determination of avermectins in edible oils.

关键词： Low temperature purification Abamectin Ivermectin Edible oil Liquid chromatography-tandem massspectrometry

Congenital dysplasia involving both medial and inferior recti: clinical features and surgical outcomes

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International Journal of Ophthalmology(English edition) 2021年第10期14卷 1628-1632页

作者： Li-Cheng fu Bin-Bin Zhu jian-hua Yan State Key Laboratory of Ophthalmology Zhongshan Ophthalmic CenterSun Yat-sen UniversityGuangzhou 510060Guangdong ProvinceChina

AIM: To investigate the clinical features and surgical outcomes of congenital dysplasia involving both inferior recti(IR) and medial recti(MR) ***: A retrospective review was conducted including cases of simultaneous congenital dysplasia of IR and MR that were diagnosed and surgically treated at the Zhongshan Ophthalmic Center, Sun Yat-sen University, China, from July 2009 to November 2019. Ocular motility, ocular alignment at distance(6 m) and near(33 cm) by prism alternating cover test and stereoacuity were assessed in all patients before and after surgery. RESULTS: A total of five patients(four males and one female;three with right eye and two with left eye congenital dysplasia) were included in this review. The patients ranged in age from 10 to 42 y(21±13.4 y). The main clinical findings were hypertropia and exotropia of the affected eye, along with motility limitations in adduction and depression. Lateral rectus(LR) recession/transposition combined with IR resection was performed in one case. Two scheduled surgeries were performed in four cases, with one involving superior rectus recession and IR resection and the others LR recession and MR resection. Mean±SD pre-surgical exotropia of 51.0±31.11 prism diopter(PD) and hypertropia of 29.20±7.12 PD in the primary position were decreased to 3.6±12.90 and 3.2±10.09 PD, respectively, at two years after surgery, with a success rate of 60% and an undercorrection rate of 40%. CONCLUSION: The main clinical features associated with simultaneous MR/IR congenital dysplasia are hypertropia and exotropia of the affected eye along with motility limitations in adduction and depression. Scheduled two-stage surgeries achieved a success rate of 60%.

关键词： medial rectus inferior rectus paralytic strabismus strabismus surgery dysplasia of extraocular muscle

Photocatalytic oxidation of primary and secondary benzyl alcohol catalyzed by two coenzyme NAD^+ models

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Chinese Chemical Letters 2007年第12期18卷 1471-1475页

作者： hua jian Xu Xiao Lan Xu Yao fu Yi Si Feng School of Chemical Engineering HeFei University of Technology Hefei 230009 China Department of Chemistry AnHui Medical University Hefei 230032 China Department of Chemistry University of Science and Technology of China Hefei 230026 China

Photocatalytic oxidation of primary and secondary benzyl alcohol to corresponding benzaldehyde or acetophenone using Acr＋Cl04- or PhAcr＋Cl04- as photocatalysts under visible light irradiation at room temperature.

关键词： Photocatalyst Coenzyme NAD^+ model Benzyl alcohol Mechanism

Spastin interacts with collapsin response mediator protein 3 to regulate neurite growth and branching

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Neural Regeneration Research 2021年第12期16卷 2549-2556页

作者： Zhi-Sheng Ji jian-Ping Li Chao-hua fu jian-Xian Luo hua Yang Guo-Wei Zhang Wutian Wu Hong-Sheng Lin Department of Orthopedics The First Affiliated Hospital of Jinan UniversityGuangzhouGuangdong ProvinceChina Guangdong-Hong Kong-Macao Institute of CNS Regeneration Jinan UniversityGuangzhouGuangdong ProvinceChina Department of Orthopedics Jiangmen Hospital of Sun Yat-sen UniversityJiangmenGuangdong ProvinceChina Re-Stem Biotechnology Co. Ltd.SuzhouJiangsu ProvinceChina Spine Surgery The Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhouGuangdong ProvinceChina

Cytoskeletal microtubule rearrangement and movement are crucial in the repair of spinal cord *** plays an important role in the regulation of microtubule *** spastin and collapsin response mediator proteins can regulate neurite growth and branching;however,whether spastin interacts with collapsin response mediator protein 3(CRMP3)during this process remains unclear,as is the mechanism by which CRMP3 participates in the repair of spinal cord *** this study,we used a proteomics approach to identify key proteins associated with spinal cord injury *** then employed liquid chromatography-mass spectrometry to identify proteins that were able to interact with glutathione ***,co-immunoprecipitation and staining approaches were used to evaluate potential interactions between spastin and ***,we co-transfected primary hippocampal neurons with CRMP3 and spastin to evaluate their role in neurite *** spectrometry identified the role of CRMP3 in the spinal cord injury repair *** chromatography-mass spectrometry pulldown assays identified three CRMP3 peptides that were able to interact with ***3 and spastin were co-expressed in the spinal cord and were able to interact with one another in vitro and in ***,CRMP3 overexpression was able to enhance the ability of spastin to promote neurite growth and ***,our results confirm that spastin and CRMP3 play roles in spinal cord injury repair by regulating neurite growth and *** proteins may therefore be novel targets for spinal cord injury *** Institutional Animal Care and Use Committee of Jinan University,China approved this study(approval ***-20181008-03)on October 8,2018.

关键词： collapsin response mediator protein 3 liquid chromatography-mass spectrometry microtubule neurite growth protein interactions proteomics spastin spinal cord injury

Genistein-induced Anticancer Effects on Acute Leukemia Cells Involve the Regulation of Wnt Signaling Pathway Through H4K20mel Rather Than DNA Demethylation

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Current Medical Science 2021年第5期41卷 869-879页

作者： hua-rong ZHOU jian-zhen SHEN Hai-ying fu Feng ZHANG fujian Institute of Hematology Fujian Provincial Key Laboratory of HematologyFujian Medical University Union Hospital Fujian Medical Center of HematologyFuzhou 350001China

Objective:To investigate the effects and mechanisms of genistein on the gene expression in the Wnt pathway in acute leukemia(AL)***:The expression of Wnt pathway genes and cell cycle-related genes were analyzed in two AL cell *** sequencing was performed to determine the methylation ***,the enrichment of H4K20mel and H3K9ac was determined using *** cytometry was used to analyze the cell ***:The IC_(50) of genistein in the two AL cell lines was lower than that for the bone marrow mesenchymal stem cell *** upregulated H4K20mel,KMT5A and Wnt suppressor genes,including Wnt5a,and downregulated the downstream target genes of Wnt,such as c-myc and β-*** methylation degree and H3K9ac enrichment in the Wnt5a promoter region remained ***,the enrichment of H4K20mel in the Wnt5a promoter and coding regions *** addition,genistein upregulated Phospho-cdc2,Mytl,Cyclin A,Cyclin E2,p21 and Phospho-histone H3,but downregulated *** cycle arrest was induced in the G2/M ***:Genistein inhibits the activation of the Wnt pathway by promoting the expression of Wnt5a through the activation of KMT5A and enrichment of H4K20mel in the Wnt5a gene promoter and coding regions,rather than *** also blocks the cell cycle in the G2/M ***,genistein is a potential anti-leukemia drug.

关键词： genistein acute leukemia,H4K20mel Wnt pathway G2/M cell cycle arrest

Polypropylene crisper and 1-MCP delay the softening,lignification and transcription levels of related enzyme genes of golden needle mushrooms(Flammulina velutipes)

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Journal of Integrative Agriculture 2022年第1期21卷 249-260页

作者： WANG Wen-jun LI Yao LI fu-hua ZENG Kai-fang MING jian College of Food Science Southwest UniversityChongqing 400715P.R.China Research Center of Food Storage&Logistics Southwest UniversityChongqing 400715P.R.China

The fresh postharvest golden needle mushroom(Flammulina velutipes) sporocarp has a high moisture content and crisp texture, but it still has high physiological activity and respiration, leading to senescence and quality *** with 1-methylcyclopropene(1-MCP) and polypropylene(PP) crispers were used to study the changes of lignification and softening of F. velutipes during storage. The main findings were as follows: the crisper packaging could effectively prolong the storage time of F. velutipes;either the 1-MCP treatment, crisper packaging or the combination of the two treatments could significantly inhibit the accumulation of lignin and the decreases in the contents of cellulose and pectin, and had certain inhibitory effects on the activities of enzymes involved in lignification and softening including phenylalanine ammonia-lyase(PAL), cinnamyl alcohol dehydrogenase(CAD), cellulase(Cx), pectin methylesterase(PME) and polygalacturonase(PG). Among them, the inhibitory effect of the crisper packaging was higher than the 1-MCP treatment, while the combination of the two treatments was the best. The results of transmission electron microscopy(TEM) and scanning electron microscopy(SEM) showed that the crisper packaging in combination with the 1-MCP treatment could effectively maintain the integrity and stability of the F. velutipes cellular structure and inhibit the emergence of plasmolysis to prevent cell membrane rupture. The transcription levels showed that the crisper packaging and the combination of the 1-MCP treatment and crisper packing could effectively affect the expression of genes for enzymes related to lignification and softening of F. velutipes. In conclusion, 1-MCP and PP crispers could delay the lignification and softening of F. velutipes during storage.

关键词： Flammulina velutipes polypropylene crisper 1-MCP softening and lignification transcription levels

EPA-E标样的UV、IR、NMR、MS分析

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山东化工 2000年第6期29卷 37-39页

作者：程传格江婷刘建华董福英王晓山东省分析测试中心山东济南250014

本文测定了EPA -E的UV、IR、NMR、MS谱 ,并对其谱图进行了解析 ,确证了EPA -E标样的化学结构。

关键词：二十碳五烯酸紫外红外核磁共振质谱分析