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香菇复水过程中质地及风味变化

食品科学 2025年第3期46卷 46-55页

作者：李倩钰曹雪慧禚秋辰尤开艳梁志棠朱丹实渤海大学食品科学与工程学院辽宁锦州121013 佛山市顺德区俊凌厨具有限公司广东佛山528000

为探究干香菇在复水过程中质地及风味的变化,本研究将干香菇于不同温度条件下进行恒温复水处理,采用电子舌、顶空固相微萃取-气相色谱-质谱联用技术和激光扫描共聚焦显微镜等技术对复水阶段香菇的质地及风味特性进行分析。结果表明,不... 详细信息

为探究干香菇在复水过程中质地及风味的变化,本研究将干香菇于不同温度条件下进行恒温复水处理,采用电子舌、顶空固相微萃取-气相色谱-质谱联用技术和激光扫描共聚焦显微镜等技术对复水阶段香菇的质地及风味特性进行分析。结果表明,不同复水温度和时间对复水香菇的质地、挥发性风味和滋味均有影响。其中,40℃复水30 min时的复水比达到平衡,鲜味强度值较高,但与其他组相比持水率有所下降,硬度和咀嚼性适中,弹性达到最大值,其菌盖褐变指数相对较高,但内褶褐变不明显,微观结构显示其菌丝较为舒展,剪切力适中。此外,40℃复水的香菇其抗氧化性高于100℃复水的香菇,可溶性蛋白损失更少,游离氨基酸含量更高并在30 min达到最大值。同时以含硫化合物和酮类为主的特征风味物质得到较好保留,而100℃复水时特征性化合物含量下降严重。综上,复水过程中香菇的质地及风味会发生显著变化,将干香菇于40℃中复水30 min能够获得较好的品质。

关键词：香菇复水性微观结构质地鲜味物质

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小家鼠种群年龄研究及其对预测预报的意义

兽类学报 1983年第1期 53-63页

作者：严志堂李春秋朱盛侃中国科学院西北高原生物研究所中国科学院西北高原生物研究所河北师范大学生物系安徽省生物研究所

关于鼠类种群的研究,国内外有不少报道,它们一般着重于种群内部结构和特征的论述,对用年龄组可作预测种群数量的依据早已引起重视,但这方面的应用尚不多见。等(1973)用在南克麦罗沃省收集的资料来计算种群内外因子对红背(鼠平)(clethri... 详细信息

关于鼠类种群的研究,国内外有不少报道,它们一般着重于种群内部结构和特征的论述,对用年龄组可作预测种群数量的依据早已引起重视,但这方面的应用尚不多见。等(1973)用在南克麦罗沃省收集的资料来计算种群内外因子对红背(鼠平)(clethrionomys rutilus)5月及7月数量水平的影响。本文通过对新疆塔西河小家鼠种群年龄研究进行翌年种群数量测报,取得初步成功。

关键词：种群年龄咀嚼面臼齿预测预报测报胎仔数小家鼠家鼠属

Chalcogenide Ovonic Threshold Switching Selector

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Nano-Micro Letters 2024年第5期16卷 1-40页

作者： Zihao Zhao Sergiu Clima Daniele Garbin Robin Degraeve Geoffrey Pourtois zhitang Song Min zhu National Key Laboratory of Materials for Integrated Circuits Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050People’s Republic of China University of Chinese Academy of Sciences Beijing 100029People’s Republic of China IMEC Kapedreef 75LeuvenBelgium

Today’s explosion of data urgently requires memory technologies capable of storing large volumes of data in shorter time frames,a feat unattain-able with Flash or *** Optane,commonly referred to as three-dimensional phase change memory,stands out as one of the most promising *** Optane with cross-point architecture is constructed through layering a storage element and a selector known as the ovonic threshold switch(OTS).The OTS device,which employs chalcogenide film,has thereby gathered increased attention in recent *** this paper,we begin by providing a brief introduction to the discovery process of the OTS ***,we summarize the key elec-trical parameters of OTS devices and delve into recent explorations of OTS materials,which are categorized as Se-based,Te-based,and S-based material ***,we discuss various models for the OTS switching mechanism,including field-induced nucleation model,as well as several carrier injection ***,we review the progress and innovations in OTS mechanism ***,we highlight the successful application of OTS devices in three-dimensional high-density memory and offer insights into their promising performance and extensive prospects in emerging applications,such as self-selecting memory and neuromorphic computing.

关键词： Non-volatile memory Ovonic threshold switch(OTS) Chalcogenide Selector

From octahedral structure motif to sub-nanosecond phase transitions in phase change materials for data storage

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Science China(Information Sciences) 2018年第8期61卷 132-146页

作者： zhitang SONG Sannian SONG Min zhu Liangcai WU Kun REN Wenxiong SONG Songling FENG State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Micro-system and Information Technology Chinese Academy of Sciences

Phase change random access memory(PCRAM) has been successfully applied in the computer storage architecture, as storage class memory, to bridge the performance gap between DRAM and Flashbased solid-state drive due to its good scalability, 3 D-integration ability, fast operation speed and compatible with CMOS technology. Focusing on phase change materials and PCRAM for decades, we have successfully developed 128 Mb embedded PCRAM chips, which can meet the requirements of most embedded systems.3 D Xpoint(3 D PCRAM), invented by Intel and Micron, has been regarded as a new breakthrough in the last 25 years since the application of NAND in 1989, which represents state-of-the-art memory *** technology has some remarkable features, such as the confined device structure with 20 nm size, the metal crossbar electrodes to reduce the resistance variations in PCRAM arrays, and the ovonic threshold switching selector that can provide a high drive current and a low leakage current. A good understanding of phase change mechanism is of great help to design new phase change materials with fast operation speed,low power consumption and long-lifetime. In this paper, we firstly review the development of PCRAM and different understandings on phase change mechanisms in recent years, and then propose a new view on the mechanism, which is based on the octahedral structure motifs and vacancies. Octahedral structure motifs are generally found in both amorphous and crystalline phase change materials. They are considered to be the basic units during phase transition, which are severely defective in the amorphous phase. These configurations turn into more ordered ones after minor local rearrangements, the growth of which results in the crystallization of rocksalt(RS) phase with a large amount of vacancies in the cation sites. Further driven by thermodynamic driving force, these vacancies move and layer along certain directions; consequently, the metastable RS structure transforms in

关键词： phase change memory phase change materials octahedral structure motif fast crystallization speed phase change mechanism

Surface modification with oxygen vacancy in Li-rich layered oxide Li1.2Mn0.54Ni0.13Co0.13O2 for lithium-ion batteries

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Journal of Materials Science & Technology 2019年第6期35卷 994-1002页

作者： Bozhou Chen Bangchuan Zhao Jiafeng Zhou zhitang Fang Yanan Huang Xuebin zhu Yuping Sun Key Laboratory of Materials Physics Institute of Solid State Physics Chinese Academy of Sciences Hefei 230031 China University of Science and Technology of China Hefei 230026 China High Magnetic Field Laboratory Chinese Academy of Sciences Hefei 230031 China

A couple of layered Li-rich cathode materials Li1.2Mn0.54Ni0.13Co0.13O2 without any carbon modification are successfully synthesized by solvothermal and hydrothermal methods followed by a calcination process. The sample synthesized by the solvothermal method(S-NCM) possesses more homogenous microstructure, lower cation mixing degree and more oxygen vacancies on the surface, compared to the sample prepared by the hydrothermal method(H-NCM). The S-NCM sample exhibits much better cycling performance, higher discharge capacity and more excellent rate performance than H-NCM. At 0.2 C rate,the S-NCM sample delivers a much higher initial discharge capacity of 292.3 mAh g^-1 and the capacity maintains 235 m Ah g^-1 after 150 cycles(80.4% retention), whereas the corresponding capacity values are only 269.2 and 108.5 m Ah g^-1(40.3% retention) for the H-NCM sample. The S-NCM sample also shows the higher rate performance with discharge capacity of 118.3 mAh g^-1 even at a high rate of 10 C, superior to that(46.5 m Ah g^-1) of the H-NCM sample. The superior electrochemical performance of the S-NCM sample can be ascribed to its well-ordered structure, much larger specific surface area and much more oxygen vacancies located on the surface.

关键词： Li-rich cathode oxide material Oxygen vacancy Solvothermal method Electrochemical performance

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不同轮轨接触模型在车桥耦合振动中的比较

应用力学学报 2010年第1期27卷 63-67页

作者：崔圣爱祝兵黄志堂西南交通大学成都610031 四川省交通勘察设计研究院成都610017

以工程实例为研究对象,建立了整车-整桥系统耦合振动数值分析模型。考虑车轮的跳轨和挤密情况,建立了单边弹簧-阻尼系统弹性轮轨接触模型。采用基于多体系统动力学和有限元法结合的联合仿真技术,计算了两种轮轨接触时动车组列车以不同... 详细信息

以工程实例为研究对象,建立了整车-整桥系统耦合振动数值分析模型。考虑车轮的跳轨和挤密情况,建立了单边弹簧-阻尼系统弹性轮轨接触模型。采用基于多体系统动力学和有限元法结合的联合仿真技术,计算了两种轮轨接触时动车组列车以不同车速通过大跨度连续桥梁的耦合振动响应。数值计算结果表明:两种轮轨接触模型的桥梁动力响应比较接近;列车的横向轮轨力、轮重减载率和脱轨系数相差较大,当速度为350km/h时,横向轮轨力增大了46.5%,轮重减载率增大了130.8%,脱轨系数增大了24.66%;用单边-弹簧阻尼系统弹性轮轨接触模型更符合实际。

关键词：车桥耦合振动轮轨接触模型多体系统动力学有限元法联合仿真

CRYSTAL STRUCTURE OF 2-(BENZOYLMETHYLENE)HEXAHYDROPYHIMIDINE

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结构化学 1987年第1期 62-65页

作者： Hang Xiaojun zhu Naijue Guo Fang Liu Zhirong Huang zhitang Institute of Chemistry, Academia Siuica, Beijing

INTNDDUCTION. In our study on ketene aminals, it has been discovered that there are some differences between 2-(benzoylmethylene)imidazolidine and 2-(benzoylmethylene)hexahydropyrimidine in their reactivities and spectral data of NMR and IR. The crystal structure of the title compound was determined in order to carry out a systematic investigation on these problems.

关键词： data IR BENZOYLMETHYLENE)HEXAHYDROPYHIMIDINE CRYSTAL STRUCTURE OF 2

Investigation of time instability factors in TiSbxTe based phase change memory

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Investigation of time instability factors in TiSbxTe based p...

第八届中国功能材料及其应用学术会议

作者： JI Xing-long WU Liang-cai1a RAO Feng SONG zhitang zhu Min FENG Songlin State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Micro-system and Information TechnologyChinese Academy of Sciences Graduate School of the Chinese Academy of Sciences

In this paper,the two time instability factors in phase change memory,amorphous resistance drift and spontaneous crystallization process,are studied based on Ti(SbxTe) and Ti(SbxTe).The drift coefficients of both components are calculated and compared under room *** reason why the drift coefficient decreases with the Ti concentration increases is discussed based on the band structure model of amorphous phase change *** the data retention change trend is also *** experiment results and the physical explaination can also be extended to other metallic element doped SbxTe alloy phase change materials.

关键词： phase change material time instability amorphous resistance drift data retention

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香菇复水过程品质变化研究进展

食品科学 2024年第20期45卷 311-319页

作者：曹雪慧李倩钰禚秋辰梁志棠朱丹实渤海大学食品科学与工程学院辽宁锦州121013 佛山市顺德区俊凌厨具有限公司广东佛山528000

新鲜的香菇中富含碳水化合物、蛋白质、脂肪、维生素和矿物质等多种物质,具有抗氧化、抗肿瘤、抑菌和提高免疫力等作用。但是由于新鲜的香菇贮藏时间较短、易发生腐败变质,通常会将新鲜香菇制成干香菇,可以有效延长贮藏期,干制过程中的... 详细信息

新鲜的香菇中富含碳水化合物、蛋白质、脂肪、维生素和矿物质等多种物质,具有抗氧化、抗肿瘤、抑菌和提高免疫力等作用。但是由于新鲜的香菇贮藏时间较短、易发生腐败变质,通常会将新鲜香菇制成干香菇,可以有效延长贮藏期,干制过程中的美拉德反应等还能为香菇提供特殊的风味,复水特性是决定干香菇品质的重要因素。本文介绍了香菇干制及复水过程及不同复水方式的优缺点,综述了不同复水方式的特点,影响复水过程的因素,复水对香菇品质的影响以及复水动力学模型的研究进展,深入探讨了香菇复水过程中质地、风味、色泽和细胞结构的变化,旨在对香菇复水及香菇加工的研究提供新思路和参考。

关键词：香菇复水质地风味