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荸荠皮提取物对土豆脆片焙烤中丙烯酰胺抑制效果的影响

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食品工业科技 2018年第21期39卷 1-4页

作者：伍淑婕黄双全聂辉黎小椿罗杨合贺州学院食品科学与工程技术研究院广西贺州542899 大连工业大学食品学院辽宁大连116034

丙烯酰胺是高温油炸或焙烤食品加工时产生的潜在致癌物,对食品安全存在威胁。为从荸荠皮的提取分离物中筛选适用于土豆脆片焙烤加工的丙烯酰胺抑制剂,本文研究了荸荠皮70%丙酮总提取物及其不同极性萃取物对土豆脆片焙烤加工中丙烯酰胺... 详细信息

丙烯酰胺是高温油炸或焙烤食品加工时产生的潜在致癌物,对食品安全存在威胁。为从荸荠皮的提取分离物中筛选适用于土豆脆片焙烤加工的丙烯酰胺抑制剂,本文研究了荸荠皮70%丙酮总提取物及其不同极性萃取物对土豆脆片焙烤加工中丙烯酰胺抑制效果的影响,并进一步探讨正丁醇萃取物过大孔树脂分离纯化后的不同浓度乙醇洗脱液对土豆脆片中丙烯酰胺抑制效果的影响。结果表明,荸荠皮提取物对土豆脆片加工中丙烯酰胺的形成均有抑制作用。在荸荠皮70%丙酮总提取物及其不同极性萃取物中,正丁醇萃取物的抑制效果最好,在其最佳抑制浓度1.0×10^(-3)mg/mL时,抑制率达到17.14%。正丁醇萃取物过大孔树脂进一步分离后,其25%乙醇洗脱液对丙烯酰胺的抑制效果最好,在最佳抑制浓度1.0×10^(-5)mg/mL时,抑制率达到24.69%,比未分离前提高了44.05%,为从荸荠皮中提取分离高效的丙烯酰胺抑制成分指明了方向。

关键词：荸荠皮提取物丙烯酰胺抑制效果分离土豆脆片

Improving Tribological Performance of Gray Cast Iron by Laser Peening in Dynamic Strain Aging Temperature Regime

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Chinese Journal of Mechanical Engineering 2015年第5期28卷 904-910页

作者： FENG Xu ZHOU Jianzhong MEI Yufen huang shu SHENG jie ZHU Weili School of Mechanical Engineering Jiangsu University

A high and stable brake disc friction coefficient is needed for automobile safety, while the coefficient degrades due to elevated temperature during the braking process. There is no better solution except changes in material composition and shape design optimization. In the dynamic strain aging（DSA） temperature regime of gray cast iron, micro-dimples with different dimple depth over diameter and surface area density are fabricated on the material surface by laser peening（LP） which is an LST method. Friction behavior and wear mechanism are investigated to evaluate the effects of surface texturing on the tribological performance of specimens under dry conditions. Through LP impacts assisted by DSA, the friction coefficients of the LPed specimens increase noticeably both at room temperature and elevated temperature in comparison to untreated specimens. Moreover, the coefficient of specimen with dimple depth over diameter of 0.03 and surface area density of 30% is up to 0.351 at room temperature, which dramatically rises up to 1.33 times that of untextured specimen and the value is still up to 0.3305 at 400℃ with an increasing ratio of 35% compared to that of untreated specimen. The surface of textured specimen shows better wear resistance compared to untreated specimen. Wear mechanism includes adhesive wear, abrasive wear and oxidation wear. It is demonstrated that LP assisted by DSA can substantially improve wear resistance, raise the friction coefficient as well as its stability of gray cast iron under elevated temperatures. Heat fade and premature wear can be effectively relieved by this surface modification method.

关键词： laser peening micro-dimples dynamic strain aging friction coefficient

Reversing effect of Tanshinone on malignant phenotypes of human hepatocarcinoma cell line

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World Journal of Gastroenterology 1998年第4期4卷 45-47页

作者： YUAN shu-Lan huang Ren-Min WANG Xiu-jie SONG Yi huang Guang-Qi Institute of Cancer Research West China University of Medical Sciences Chengdu 610041Sichuan Province China

AIM To study the reversing effect of Chinese drug tanshinone on malignant phenotype of cancer *** Human hepatocarcinoma cell line (SMMC-7721) was treated in vitro with 0.5mg/L tanshinone for 4 days, and variation in cell differentiation was *** The morphology of cancer cells was tended toward well differentiation and cell growth was markedly inhibited. BrdU uptake assay and immunohistochemical stain of PCNA showed that the BrdU labeling rate and PCNA positive rate were lower than the controls, but no difference was found statistically as compared with all transretinoic acid. Flow cytometric assay demonstrated that S phase cells decreased and G0/G1 phase cells increased. Expression of c-myc oncogene protein decreased but the c-fos oncogene protein markedly *** Tanshinone could reverse the inducing differentiation in human hepatocarcinoma cells (SMMC-7721). It may become a new prospective inducer of cell differentiation to treat cancers.

关键词： tanshinone liver neoplasms carcinoma,hepatocellular tumor cell,cultured cell line immunohistochemistry proliferation cell nuclear antigen flow cytometry

Two-micron （thulium） laser resection of the prostate- tangerine technique： a new method for BPH treatment

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Asian Journal of Andrology 2009年第3期11卷 277-281页

作者： shu-jie Xia Department of Urology First People＇s Hospital Affiliated to Shanghai Jiao Tong University Shanghai 200080 China

Two-micron （thulium） laser resection of the prostate-tangerine technique （TmLRP-TT） is a transurethral procedure that uses a thulium laser fiber to dissect whole prostatic lobes off the surgical capsule, similar to peeling a tangerine. We recently reported the primary results. Here we introduce this procedure in detail. A 70-W, 2-um （thulium） laser was used in continuous-wave mode. We joined the incision by making a transverse cut from the level of the verumontanum to the bladder neck, making the resection sufficiently deep to reach the surgical capsule, and resected the prostate into small pieces, just like peeling a tangerine. As we resected the prostate, the pieces were vaporized, sufficiently small to be evacuated through the reseetoscope sheath, and the use of the mechanical tissue morcellator was not required. The excellent hemostasis of the thulium laser ensured the safety of TmLRP-TT. No patient required blood transfusion. Saline irrigation was used intraoperatively, and no case of transurethral resection syndrome was observed. The bladder outlet obstruction had clearly resolved after catheter removal in all cases. We designed the tangerine technique and proved it to be the most suitable procedure for the use of thulium laser in the treatment of benign prostatic hyperplasia （BPH）. This procedure, which takes less operative time than standard techniques, is safe and combines efficient cutting and rapid organic vaporization, thereby showing the great superiority of the thulium fiber laser in the treatment of BPH. It has been proven to be as safe and efficient as transurethral resection of the prostate （TURP） during the 1-year follow-up.

关键词： benign prostatic hyperplasia laser surgery prostatectomy tangerine technique thulium

Distributed Nash Equilibrium Seeking on Compact Action Sets over Jointly Strongly Connected Switching Networks

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Journal of Systems Science & Complexity 2024年第1期37卷 63-81页

作者： HE Xiongnan huang jie Department of Mechanical and Automation Engineering The Chinese University of Hong KongHong Kong 999077China.

This paper studies the distributed Nash equilibrium seeking(DNES)problem for games whose action sets are compact and whose network graph is switching satisfying the jointly strongly connected *** keep the actions of all players in their action sets all the time,one has to resort to the projected gradient-based *** the assumption that the unique Nash equilibrium is the unique equilibrium of the pseudogradient system,an algorithm is proposed that is able to exponentially find the Nash ***,the authors also consider the distributed Nash equilibrium seeking problem for games whose actions are governed by high-order integrator dynamics and belong to some compact *** examples are used to illustrate the proposed approach.

关键词： Compact action sets jointly strongly connected switching graphs Nash equilibrium seeking projected gradient-based algorithm.

Sampled-Data Semi-Global Robust Output Regulation for a Class of Nonlinear Systems

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Journal of Systems Science & Complexity 2021年第5期34卷 1743-1765页

作者： LIU Wei huang jie School of Automation Science and Engineering South China University of TechnologyGuangzhou 510641China Shenzhen Research Institute The Chinese University of Hong KongShenzhen 518057China Department of Mechanical and Automation Engineering The Chinese University of Hong KongShatinN.T.Hong Kong 999077China

This paper investigates the semi-global robust output regulation problem for a class of uncertain nonlinear systems via a sampled-data output feedback control *** makes the results interesting is that the nonlinearities of the proposed system do not have to satisfy linear growth condition and the uncertain parameters of our system are allowed to belong to some arbitrarily large prescribed compact *** cases are *** first case is that the exogenous signal is *** second case is that the exogenous signal is time-varying and *** the first case,the authors solve the problem exactly in the sense that the tracking error approaches zero *** the second case,the authors solve the problem practically in the sense that the steady-state tracking error can be made arbitrarily ***,an example is given to illustrate the effectiveness of our approach.

关键词： Internal model nonlinear systems robust output regulation sampled-data control

Viscosity and surface tension of CaF_(2)-CaO-Al_(2)O_(3)-based slag with varying SiO_(2) and B_(2)O_(3) contents for ESR of rotor steel

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Journal of Iron and Steel Research International 2023年第1期30卷 74-81页

作者： Yi huang Cheng-bin Shi Xiu-xiu Wan Yu-jing Liang Jing Li shu-jie Liu State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China Xingtai shuzhi Metallurgy Technology Co. Ltd.Xingtai 054027HebeiChina

The effect of SiO_(2) and B_(2)O_(3) on viscosity and surface tension of CaF_(2)-CaO-Al_(2)O_(3)-MgO-SiO_(2)-B_(2)O_(3) slag designed for electroslag remelting of rotor steel was *** viscosity of the slag melts increases with increasing the SiO_(2) content from 0.37 to 8.03 mass%,and the viscous activation energy increases from 54.21 to 58.49 kJ/*** B_(2)O_(3) content of the slag from 0 to 3.62 mass%exhibits a similar effect on the viscosity,and the activation energy increases from 47.30 to 55.71 kJ/*** increase in the viscosity and activation energy for viscous flow of slag is attributed to the enhanced polymerization degree of slag melts network with increasing either SiO_(2) or B_(2)O_(3) *** surface tension of slag melts decreases with increasing *** surface tension of slag melts decreases with increasing either SiO_(2) or B_(2)O_(3) content,which is originated from the increase in the polymerization degree and the decrease in the CaO content of the slag.

关键词： High-fluoride slag Structure Viscosity Surface tension Activation energy

TWO DIMENSIONAL RIEMANN PROBLEM FOR GASDYNAMICS SYSTEM IN THREE PIECES

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Journal of Computational Mathematics 1999年第3期17卷 327-336页

作者： Li, jie-quan Yang, shu-li Acad Sinica Inst Math Beijing 100080 Peoples R China Acad Sinica Inst Appl Math Beijing 100080 Peoples R China

The Riemann problem for two-dimensional flow of polytropic gas with three constant initial data is considered. Under the assumption that each interface of initial data outside of the origin projects exactly one planar wave of shock, rarefaction wave or contact discontinuity, it is proved that only two kinds of combinations, JRS and Js, are reasonable. Numerical solutions are obtained by using a nonsplitting second order accurate MmB Scheme, and they efficiently reflect the complicated configurations and the geometric structure of solutions of gas dynamics system. (Author abstract) 10 Refs.

关键词： two-dimensional Riemann problem MmB scheme gas dynamics

Distributed Robust Containment Control of Linear Heterogeneous Multi-Agent Systems:An Output Regulation Approach

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IEEE/CAA Journal of Automatica Sinica 2022年第5期9卷 864-877页

作者： Wenchao huang Hailin Liu jie huang College of Electrical Engineering and Automation Fuzhou UniversityFuzhou 350108China College of Electrical Engineering and Automation Fuzhou UniversityFuzhou 350108 School of Automation Sicience and Engineering South China University of TechnologyGuangzhou 510641China IEEE

In this paper,we consider the robust output containment problem of linear heterogeneous multi-agent systems under fixed directed networks.A distributed dynamic observer based on the leaders’measurable output was designed to estimate a convex combination of the leaders’***,for the case of followers with identical state dimensions,distributed dynamic state and output feedback control laws were designed based on the state-coupled item and the internal model compensator to drive the uncertain followers into the leaders’convex hull within the output regulation ***,we extended theoretical results to the case where followers have nonidentical state *** establishing virtual errors between the dynamic observer and followers,a new distributed dynamic output feedback control law was constructed using only the states of the compensator to solve the robust output containment ***,two numerical simulations verified the effectiveness of the designed schemes.

关键词： Containment control internal model principle multi-agent systems observer technique output regulation