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不同气体气调大豆毛油储藏期预测模型构建

中国粮油学报 2024年第4期39卷 17-24页

作者：王成龙邹真杨轶天庞林江管玉格路兴花金建德浙江农林大学食品与健康学院杭州311300 浙江省粮食局直属粮油储备库杭州311300

以大豆毛油为研究对象,研究其在不同气体(Ar、N_(2)、CO_(2))、不同体积分数(95%、98%)气调储藏过程中主要品质变化规律,构建预测模型并进行预测和验证,为毛油安全储藏及品质预测提供参考。结果表明,储藏期间N_(2)、Ar、CO_(2)气调油脂... 详细信息

以大豆毛油为研究对象,研究其在不同气体(Ar、N_(2)、CO_(2))、不同体积分数(95%、98%)气调储藏过程中主要品质变化规律,构建预测模型并进行预测和验证,为毛油安全储藏及品质预测提供参考。结果表明,储藏期间N_(2)、Ar、CO_(2)气调油脂POV分别比CK显著降低了72.7%~91.5%、74.2%~92.2%和75.7%~89.9%,气调处理抑制POV效果显著,且Ar效果最好,其次为N_(2)和CO_(2);Ar和N_(2)气调抑制AV效果显著,CO_(2)处理则具有显著促进作用。3种气体体积分数98%气调储藏大豆毛油POV和AV不同程度低于体积分数95%。基于POV,运用一级氧化动力学模型结合Arrhenius方程建立储藏期预测模型,拟合精度高(R^(2)>0.95),验证效果好,预测储藏期相对误差为8.3%。结合实测和预测模型预测结果得出,25、40、50、60℃情况下,CK组储藏期分别为69、38、26、19 d,Ar 98%和N_(2)98%组储藏期分别为155、104、83、66 d和129、92、76、63 d,Ar气调处理对维持大豆毛油储藏品质效果好于N_(2)气调,但差异不显著,且体积分数越高,效果越好。

关键词：大豆毛油气体气调储藏期预测模型

Rapid fatty acids detection of vegetable oils by Raman spectroscopy based on competitive adaptive reweighted sampling coupled with support vector regression

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Food Quality and Safety 2022年第4期6卷 545-554页

作者： linjiang pang Hui Chen Liqing Yin Jiyu Cheng Jiande Jin Honghui Zhao Zhihao Liu Longlong Dong Huichun Yu Xinghua Lu College of Food and Health Zhejiang A&F UniversityHangzhouChina College of Food&Bioengineering Henan University of Science and TechnologyLuoyangChina Zhejiang Provincial Grain Breau of Grain and Oil Reserve HangzhouChina

Objectives:The composition and content of fatty acids are critical indicators of vegetable oil *** overcome the drawbacks of traditional detection methods,Raman spectroscopy was investigated for the fast determination of the fatty acids composition of *** and Methods:Rapeseed and soybean oil at different depths of the oil tank at different storage times were collected and an eighth-degree polynomial function was used to fit the Raman ***,the multivariate scattering correction,standard normal variable transformation(SNV),and Savitzky–Golay convolution smoothing methods were ***:Polynomial fitting combined with SNV was found to be the optimal pretreatment *** wavelengths were selected by competitive adaptive reweighted *** monounsaturated fatty acids(MUFAs),polyunsaturated fatty acids(PUFAs),and saturated fatty acids(SFAs),44,75,and 92 characteristic wavelengths of rapeseed oil,and 60,114,and 60 characteristic wavelengths of soybean oil were *** vector regression was used to establish the prediction *** R^(2)values of the prediction results of MUFAs,PUFAs,and SFAs for rapeseed oil were 0.9670,0.9568,and 0.9553,and the root mean square error(RMSE)values were 0.0273,0.0326,and 0.0340,*** R^(2)values of the prediction results of fatty acids for soybean oil were respectively 0.9414,0.9562,and 0.9422,and RMSE values were 0.0460,0.0378,and 0.0548,respectively.A good correlation coefficient and small RMSE value were obtained,indicating the results to be highly accurate and ***:Raman spectroscopy,based on competitive adaptive reweighted sampling coupled with support vector regression,can rapidly and accurately analyze the fatty acid composition of vegetable oil.

关键词： Raman spectroscopy fatty acid composition competitive adaptive reweighted sampling support vector regression

Ytterbium modified birnessite MnO_(2) for improving deep oxidation of toluene

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Journal of Rare Earths 2024年第4期42卷 668-675页

作者： linjiang Sun Yan Cheng Yujie Liu Can Yi Faculty of Geosciences and Environmental Engineering Southwest Jiaotong UniversityChengdu611756China

A series of rare earth metals modified birnessite manganese dioxides(RE-Mn)was synthesized by hydrothermal method and their catalytic degradation of toluene was ***-Mn shows the best toluene oxidation activity with the conversion of T50%and T99%at 196 and 226℃,*** physiochemical characterizations identified that the high catalytic performance and excellent stability of Yb-Mn are mainly associated with its higher molar ratios of Mn^(4+)/Mn^(3+),more lattice oxygen(Olatt),and better mobility of surface adsorbed oxygen(O_(ads)).Moreover,it is confirmed that introduction of Yb into birnessite MnO_(2) facilitates the production of acetic acid at lower *** results can aid the design of high-efficiency manganese oxide catalysts for the catalytic combustion of VOCs.

关键词： Manganese oxide Rare earth metal doping Toluene Catalytic combustion

西南地区淀粉加工型甘薯的淀粉性状对粉丝蒸煮品质的影响

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食品研究与开发 2024年第10期45卷 7-13页

作者：潘雪萍莫罗杭徐锡明傅玉凡张治国吴卫成路兴花庞林江陆国权浙江农林大学薯类作物研究所现代农学院食品与健康学院(现代粮食产业学院)浙江省农产品品质改良重点实验室浙江杭州311300 西南大学生命科学学院重庆市甘薯工程技术研究中心重庆400715 浙江省农业科学院食品科学研究所浙江杭州310022

为探究西南地区淀粉加工型甘薯淀粉与其粉丝蒸煮品质之间的关系,从甘薯的淀粉组成、物化特性以及粉丝蒸煮品质指标进行测定,并进行相关性和主成分分析。结果表明:甘薯粉丝的蒸煮品质受淀粉糊化特性影响最大;结晶度与粉丝膨润度呈极显著... 详细信息

为探究西南地区淀粉加工型甘薯淀粉与其粉丝蒸煮品质之间的关系,从甘薯的淀粉组成、物化特性以及粉丝蒸煮品质指标进行测定,并进行相关性和主成分分析。结果表明:甘薯粉丝的蒸煮品质受淀粉糊化特性影响最大;结晶度与粉丝膨润度呈极显著正相关(P<0.01),粗蛋白含量与粉丝膨润度呈显著负相关(P<0.05);谷值黏度、崩解值、峰值时间、成糊温度和总磷含量与粉丝断条率显著相关(P<0.05);成糊温度与粉丝煮沸损失呈极显著正相关(P<0.01);甘薯粉丝加工时,可以以糊化特性、结晶度、粗蛋白含量、总磷含量为参考依据,选择合适甘薯品种以提高其粉丝蒸煮品质;主成分分析得到3个主成分,累计贡献率为87.8944%,并建立综合评价数学函数:F=0.4657F_(1)+0.3022F_(2)+0.2321F_(3)。

关键词：甘薯淀粉组成物化特性粉丝蒸煮品质

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Genes & Diseases 2024年第1期11卷 367-381页

作者： Yunchao Zhang Jiayu Tang Cheng Wang Qinxiu Zhang Anqi Zeng linjiang Song School of Medical and Life Sciences Chengdu University of Traditional Chinese MedicineChengduSichuan 611137China Institute of Translational Pharmacology and Clinical Application Sichuan Academy of Chinese Medical ScienceChengduSichuan 610041China School of Pharmacy Chengdu University of Traditional Chinese MedicineChengduSichuan 611137China

The incidence and mortality rates of cancer are increasing every year worldwide but the survival rate of cancer patients is still ***,it is necessary to further elucidate the molecular mechanisms involved in tumor development and drug resis-tance to improve cancer cure or survival *** recent years,autophagy has become a hot topic in the field of oncology research,which plays a double-edged role in tumorigenesis,pro-gression,and drug ***,long non-coding RNA(lncRNA)has also been shown to regulate autophagy,and the two-sided nature of autophagy determines the dual regulatory role of autophagy-related IncRNAs(ARlncRNAs).Therefore,ARlncRNAs can be effective ther-apeutic targets for various ***,the high abundance and stability of ARlncR-NAs in tumor tissues make them promising *** this review,we summarized the roles and mechanisms of ARlncRNAs in tumor cell proliferation,apoptosis,migration,invasion,drug resistance,angiogenesis,radiation resistance,and immune *** addition,we described the clinical significance of these ARlncRNAs,including as biomarkers/therapeutic targets and their association with clinical drugs.

关键词： Apoptosis Autophagy Biomarker Cancer Drug resistance LncRNA

Asynchronous gain-scheduled control of deepwater drilling riser system with hybrid event-triggered sampling and unreliable communication

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Frontiers of Information Technology & Electronic Engineering 2024年第2期25卷 272-285页

作者： Na pang Dawei ZHANG Shuqian ZHU School of Mathematics Shandong UniversityJinan250100China

This paper investigates the recoil control of the deepwater drilling riser system with nonlinear tension force and energy-bounded friction force under the circumstances of limited network resources and unreliable *** from the existing linearization modeling method,a triangle-based polytope modeling method is applied to the nonlinear riser *** on the polytope model,to improve resource utilization and accommodate random data loss and communication delay,an asynchronous gain-scheduled control strategy under a hybrid event-triggered scheme is *** asynchronous linear parameter-varying system that blends input delay and impulsive update equation is presented to model the nonlinear networked recoil control system,where the asynchronous deviation bounds of scheduling parameters are *** to the Lyapunov-Krasovskii functional method,some solvable conditions of disturbance attenuation analysis and recoil control design are derived such that the resulting networked system is exponentially mean-square stable with prescribed H∞*** obtained numerical results verified that the proposed nonlinear networked control method can achieve a better recoil response of the riser system with less transmission data compared with the linear control method.

关键词： Riser system Recoil control Asynchronous gain-scheduled control Data loss Event-triggered scheme

Compositional evolution for mixed aerosols containing gluconic acid and typical nitrate and the effect of multiply factors on hygroscopicity

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Journal of Environmental Sciences 2024年第5期139卷 206-216页

作者： Yue Zhu Shufeng pang Yunhong Zhang School of Chemistry and Chemical Engineering Beijing Institute of TechnologyBeijing 100081China

The aging process of atmospheric aerosols usually leads to a mixture of inorganic salts and organic compounds of anthropogenic *** organic compounds,polyhydroxy organic acids are important components,however,the study on composition and hygroscopic properties of the mixture containing inorganics and polyhydroxy organic acids is *** this study,gluconic acid,the proxy of polyhydroxy organic acids,is mixed with the representative nitrate(Mg(NO_(3))_(2),Ca(NO_(3))_(2))to form ***-FTIR and optical microscopy are employed to study the component changes and hygroscopicity as a function of relative *** relative humidity fluctuates,the FTIR-ATR spectra display that the internal mixed gluconic acid(CH_(2)(CH)_(4)(OH)_(5)COOH)and nitrate can react to release acidic gases,forming relevant gluconate and further affecting the *** specific presentation is particles cannot be recovered to their original size after the dehydration-hydration process and there will be some disparities in GF for mixed *** the gluconic acid-Ca(NO_(3))_(2)/Mg(NO_(3))_(2)mixtures with molar ratios of 1:1,higher degree of reaction resulting in the production of large amounts of gluconate should be responsible to the lower hygroscopicity compared to ZSR *** 1:2 gluconic acid-nitrate mixed systems(with higher nitrate content),the hygroscopicity of mixtures are higher than the ZSR prediction.A possible reason could be‘salt-promoting effect’on the organic fractions of the surplus inorganic salt in the *** data can improve the chemical composition list evaluation,in turn hygroscopic properties and phase state of atmospheric aerosol,and then the climate effect.

关键词： Hygroscopicity Gluconic acid Reaction ZSR simulation Size growth factors

Ionic liquid-assisted preparation of hydroxyapatite and its catalytic performance for decarboxylation of itaconic acid

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Chinese Journal of Chemical Engineering 2024年第3期67卷 9-15页

作者： Shutong pang Hualiang An Xinqiang Zhao Yanji Wang Hebei Provincial Key Laboratory of Green Chemical Technology and Efficient Energy Saving Tianjin Key Laboratory of Chemical Process SafetySchool of Chemical Engineering and TechnologyHebei University of TechnologyTianjin 300130China

The synthesis of methacrylic acid from biomass-derived itaconic acid is a green route,for it can get rid of the dependence on fossil *** order to solve the problems on this route such as use of a preciousmetal catalyst and a corrosive homogeneous alkali,we prepared a series of hydroxyapatite catalysts by an ionic liquid-assisted hydrothermal method and evaluated their catalytic *** results showed that the ionic liquid[Bmim]BF_(4) can affect the crystal growth of hydroxyapatite,provide fluoride ion for fluorination of hydroxyapatite,and adjust the surface acidity and basicity,morphology,textural properties,crystallinity,and composition of ***[Bmim]BF4 dosage and hydrothermal temperature can affect the fluoride ion concentration in the hydrothermal system,thus changing the degree of fluoridation of *** fluoride-ion concentration can lead to the formation of CaF_(2) and thus significantly decrease the catalytic performance of *** hydrothermal time mainly affects the growth of hydroxyapatite crystals on the c axis,leading to different catalytic *** suitable conditions for the preparation of this fluoridized hydroxyapatite are as follows:a mass ratio of[Bmim]BF4 to calcium salt=0.2:1,a hydrothermal time of 12 h,and a hydrothermal temperature of 130℃.A maximal methacrylic acid yield of 54.7%was obtained using the fluoridized hydroxyapatite under relatively mild reaction conditions(250℃ and 2 MPa of N_(2))in the absence of a precious-metal catalyst and a corrosive homogeneous alkali.

关键词： Ionic liquid Hydroxyapatite Itaconic acid Methacrylic Decarboxylation reaction

Rational Design of Capping Ligands of Quantum Dots for Biosensing

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Chemical Research in Chinese Universities 2024年第2期40卷 162-172页

作者： XU Xinran LIU An-an pang Daiwen State Key Laboratory of Medicinal Chemical Biology Tianjin Key Laboratory of Biosensing and Molecular RecognitionResearch Center for Analytical SciencesCollege of ChemistryNankai UniversityTianjin300071P.R.China

Quantum dots have been widely applied in biosensing due to their outstanding optical *** emissions of quantum dots are mainly determined by their composition and size,as described by the Brus’s ***,in this case,their emissions are hardly regulated reversibly and responsively,which are unsuitable for biosensing and *** the last decade,capping ligands have been used for designing biosensors because of their responsive regulation on the photoluminescence of quantum ***,we first summarize the advances in characterization and calculation specific for ligands,which have helped to provide insights into the photoluminescence process and energy band theory of quantum *** then review two ways of ligand design that influence the optical properties of quantum dots:affecting the process of photoluminescence,or the orbital/electronic *** the latter case,the atoms on both the ligand and the surface of the quantum dot interact to affect the energy band structure of the quantum dot *** are presented of how these quantum dots that possess responsive properties due to the design of the ligands have been applied to *** further exploration,we hope to see advances in the fundamental understanding of the energy band structures and practical applications of these quantum dots.

关键词： Quantum dot Ligand Photoluminescence Responsiveness Sensor