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冰晶生长对冷冻水产品品质影响及新型冷冻方式研究进展

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现代食品科技 2024年第2期40卷 366-373页

作者：罗江美赵茜赵健茹孙海涛邵信儒王超曹亚茹汪灵松韦凤举通化师范学院食品科学与工程学院吉林通化134000 通化师范学院长白山食用植物资源开发工程中心吉林通化134000 浙江工商大学食品与生物工程学院浙江杭州310018 吉林医药学院公共卫生学院吉林吉林132013

冷冻技术在水产品保鲜方面应用广泛,但水产品在冻结过程中受冰晶形成、晶体生长与冰晶重结晶的影响,易造成细胞结构的破损,导致水产品品质下降。为深入分析冰晶生长与水产品品质变化间的关系,该文总结了冰晶生长对水产品的蛋白质变性、... 详细信息

冷冻技术在水产品保鲜方面应用广泛,但水产品在冻结过程中受冰晶形成、晶体生长与冰晶重结晶的影响,易造成细胞结构的破损,导致水产品品质下降。为深入分析冰晶生长与水产品品质变化间的关系,该文总结了冰晶生长对水产品的蛋白质变性、脂肪氧化、持水力、质构及感官特性影响,综述了物理场辅助冻结及添加抗冻剂、重结晶抑制剂等减小冰晶尺寸的新方法,为控制冰晶生长及提高冷冻水产品品质提供了理论参考。

关键词：冰晶生长水产品冷冻品质新型冷冻方式

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石油化工用压力管道的无损检测技术应用研究

锅炉制造 2024年第3期 53-54,57页

作者：石美真许子豪赵建如山东省安泰化工压力容器检验中心有限公司山东济南250014

本文对当前石油化工用压力管道常见的无损检测技术进行了阐述,探讨了无损检测技术在实际应用中的技术难点及解决策略,提出了结合多种无损检测技术的综合检测方案,以期达到更高的检测效率和准确率。旨在为石油化工行业压力管道的安全评... 详细信息

本文对当前石油化工用压力管道常见的无损检测技术进行了阐述,探讨了无损检测技术在实际应用中的技术难点及解决策略,提出了结合多种无损检测技术的综合检测方案,以期达到更高的检测效率和准确率。旨在为石油化工行业压力管道的安全评估和维护提供科学的参考和技术支持。

关键词：石油化工压力管道无损检测管道破损

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渗透检测在工业管道定期检验中应用研究

锅炉制造 2024年第3期 62-64页

作者：许子豪赵建如石美真山东省安泰化工压力容器检验中心有限公司山东济南250014

工业管道因输送介质的多样性和运行环境的复杂性,易发生腐蚀、裂纹等问题,因此定期进行有效的检测显得尤为重要。渗透检测作为一种能够高效发现微小裂纹和表面缺陷的方法,为提升工业管道检验工作提供了新思路。本文针对渗透检测在工业... 详细信息

工业管道因输送介质的多样性和运行环境的复杂性,易发生腐蚀、裂纹等问题,因此定期进行有效的检测显得尤为重要。渗透检测作为一种能够高效发现微小裂纹和表面缺陷的方法,为提升工业管道检验工作提供了新思路。本文针对渗透检测在工业管道检验中的应用进行系统分析,探讨了渗透检测在识别管道微小裂纹、腐蚀缺陷等方面的有效性。

关键词：渗透检测工业管道定期检验显像剂

The bimodality of the Luzon Strait deep water

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Acta Oceanologica Sinica 2014年第5期33卷 17-27页

作者： WU Qingsong zhao jianru ZHANG Junbiao SHI Weiyong LIU Chunqiu Key Laboratory of Engineering Oceanography the Second Institute of Oceanography State Oceanic Administration Key Laboratory of Submarine Geosciences the Second Institute of Oceanography State Oceanic Administration State Reasearch Centre for Island Exploitation and Management the Second Institute of Oceanography State Oceanic Administration

Combined conductivity-temperature-depth （CTD） casts and Argo profiles, 3 086 historical hydrocasts were used to quantify the water column characteristics in the northern South China Sea （SCS） and its adjacent waters. Based on a two-dimensional ＂gravest empirical mode＂（GEM）, a gravitational potential （4, a vertically integrated variable） was used as proxy for the vertical temperature profiles TG（P, φ）. φ integrated from 8 MPa to the surface shows a close relationship with the temperature, except in the deep layer greater than 15 MPa, which was caused by the bimodal deep water in the region. The GEM temperature profiles successfully revealed the bimodality of the Luzon Strait deep water, that disparate hydrophic vertical profiles can produce distinct specific volume anomaly （δ） in the SCS and the western Philippine Sea （WPS）, but failed in the Luzon Strait, where different temperature profiles may produce a same 6. A significant temperature divergence between the SCS water and the WPS water confirmed that the bimodal structure is strong. The deepwater bifurcation starts at about 15 MPa, and gets stronger with increasing depth. As the only deep channel connecting the bimodal-structure waters, water column characteristics in the Luzon Strait is in between, but much closer to the SCS water because of its better connectivity with the SCS. A bimodal temperature structure below 15 MPa reveals that there was a persistent baroclinic pressure gradient driving flow through the Luzon Strait. A volume flux predicted through the Bashi Channel with the hydraulic theory yields a value of 5.62×10^6 m^3/s using all available profiles upstream and downstream of the overflow region, and 4.03×10^6 and 2.70×10^6 m^3/s by exclusively using the profiles collected during spring and summer, respectively. No volume flux was calculated during autumn and winter because profiles are only available for the upstream of the Bashi Channel during the corresponding period.

关键词： Luzon Strait historical hydrocasts gravest empirical mode deep water bimodality volume flux

Changes in sea surface temperature in western South China Sea over the past 450 ka

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Chinese Science Bulletin 2009年第18期54卷 3335-3343页

作者： LI Li WANG Hui LI jianru zhao MeiXun WANG PinXian State Key Laboratory of Marine Geology Tongji University Shanghai 200092 China

Sea surface temperature over the past 450 ka was obtained by the unsaturation of molecular fossil-long chain alkenone with a resolution of about 1 ka from the western South China Sea. This is the longest temperature profile in the South China Sea at such high resolution. The U3k7′-SST results revealed similar glacial-interglacial cycles as the δ18O profile of planktonic foraminifera, with SST variability of 23―25.5℃ for glacial and 25―28℃ for interglacial periods. The highest SST (28.4℃) was recorded at MIS5.5 and lowest SST (22.6℃) during MIS2. The SST record preceded the planktonic foraminiferal δ18O on five glacial-interglacial transitions. Comparison of temperature records from the Southern and Northern Hemispheres indicated a more Southern Hemisphere-like pattern for the temperature variation in the SCS. Strong precession and semiprecession signals in the spectra of our SST record manifest the tropical phenomena.

关键词：华南西部海表温度中国浮游有孔虫海温变化海上间冰期表面温度

The spatial distribution of major and trace elements of surface sediments in the northeastern Beibu Gulf of the South China Sea

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Acta Oceanologica Sinica 2019年第3期38卷 93-102页

作者： Qian Ge George Z Xue Liming Ye Dong Xu jianru zhao Fengyou Chu Second Institute of Oceanography Ministry of Natural Resources Key Laboratory of Submarine Geosciences State Oceanic Administration Department of Oceanography and Coastal Sciences Louisiana State University Center for Computation and Technology Louisiana State University Coastal Studies Institute Louisiana State University

A multi-index analysis including grain size, major and trace elements is performed on the surface sediments from the northeastern Beibu Gulf to trace the sources of the sediments and to understand the controlling factors for elements distribution. The mean grain size exhibits a wide variation ranging from 0.09Φ to 8.05Φ with an average value of 5.33Φ. The average contents of major elements descend in an order of c(SiO_2)>c(Al_2O_3)>c(Fe_2O_3)>c(CaO)>c(MgO)>c(K_2O)>c(Na_2O)>c(TiO_2)>c(P_2O_5)>c(MnO), while those of trace elements exhibit a descending order of c(Sr)>c(Rb)>c(V)>c(Zn)>c(Cr)>c(Pb)>c(Ni)>c(Cu)>c(As). On the basis of elementary distribution characteristics and statistical analyses, the study area is divided into the four zones: Zone I is located in the northeastern coastal area of the gulf, which receives large amount of fluvial materials from local rivers in Guangxi and Guangdong, China, and the Qiongzhou Strait; Zone Ⅱ is located in the center of the study area, where surface sediments exhibits a multiple source; Zone Ⅲ is located in the Qiongzhou Strait, where surface sediments are dominated by materials from the Zhujiang River and Hainan; Zone IV is located in the southwest of the study area, where surface sediments are mainly originated from the Red River and Hainan. The statistical analyses of sediment geochemical characteristics reveal that the grain size, which is mainly influenced by hydrodynamics and mineral composition of terrigenous materials, is the leading factor controlling the elementary ***, impacts from anthropogenic activities and marine biogenic process will also be taken into consideration.

关键词： grain size major and trace elements Beibu Gulf spatial distribution sediment source

The spatial multiscale variability of heavy metals based on factorial kriging analysis: A case study in the northeastern Beibu Gulf

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Acta Oceanologica Sinica 2015年第12期34卷 137-146页

作者： zhao jianru CHU Fengyou JIN Xianglong WU Qingsong YANG Kehong GE Qian JIN Lu Graduate School China University of GeosciencesWuhan Key Laboratory of Submarine Geosciences State Oceanic Administration Key Laboratory of Engineering Oceanography Second Institute of Oceanography State Oceanic Administration School of Earth Sciences Zhejiang University

Factorial kriging analysis is applied to the research on the spatial multiscale variability of heavy metals in submarine. It is used to analyze the multiscale spatial structures of seven heavy metals, Ni, Cu, Zn, Pb, Cr, As and Cd in the surface sediment from the northeastern of Beibu Gulf, identify and separate spatial variations at different scales of heavy metals, and discuss the provenance of heavy metals and the influencing factors. The results show that the existence of three-scale spatial variations those consist of nugget effect, a spherical structure with range of 30 km（short-range scale） and a spherical structure with range of 140 km（long-range scale） in the linear model of coregionalization fitted. The spatial distribution features of seven heavy metals at short-range scale reflect ＂spot-like＂ or ＂stripe-like＂ local-scale spatial variations; the spatial distribution features of the seven heavy metals at long-range scale represent ＂slice-like＂ regional-scale spatial variations. At local scale, Zn, Cr, Ni,Cu, Pb and Cd are derived primarily from parent materials of Hainan Island, Leizhou Peninsula and Guangxi land, whose spatial distribution characteristics are controlled by granularity of sediments, while As is influenced dominantly by human pollution components from Hainan Island and Leizhou Peninsula. At regional scale, Zn,Cr, Ni and Cu originate primarily from parent rock materials of Leizhou Peninsula and Hainan Island, secondly from Guangxi land; As originated primarily from parent rock materials from Hainan Island, secondly from Leizhou Peninsula and Guangxi land. These metals are transported and migrated with sediments dominated by the anticlockwise circulation of Beibu Gulf year-round, deposited in ＂convergence center＂, forming the whole sedimentary pattern in direction of NWW-NNW at regional scale. The difference in distribution type between As and other metals at regional scale is mainly due to their different geochemical behavior.

关键词： spatial multiscale variability heavy metals factorial kriging analysis sediments northeastern Beibu Gulf

Journal of Genetics and Genomics in 2023:progresses and beyond

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Journal of Genetics and Genomics 2024年第1期51卷 1-2页

作者： Xiu-Fen Song Xiaoxuan Guo Jing zhao Yutian Zhang Yuan Qin jianru Zuo Journal of Genetics and Genomics Institute of Genetics and Developmental BiologyChinese Academy of Sciences&the Genetics Society of ChinaBeijing 100101China

Journal of Genetics and Genomics(JGG),launched in 1974,celebrates its 50th birthday in *** continuous support from our authors,reviewers,readers,and the editorial board,JGG has made remarkable progress in the past year by publishing 122 papers covering major disciplines in life sciences and medical genetics with exciting *** is worthwhile to note that we have recruited 66 young talents to join JGG as junior editors,resulting in significant improvement in manuscript evaluation and journal ***,we summarize major progresses reported in JGG in 2023 fromaneditorial view.

关键词： journal beyond promotion

Genetic variation in a heat shock transcription factor modulates cold tolerance in maize

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Molecular Plant 2024年第9期17卷 1423-1438页

作者： Lei Gao Lingling Pan Yiting Shi Rong Zeng Minze Li Zhuoyang Li Xuan Zhang Xiaoming zhao Xinru Gong Wei Huang Xiaohong Yang Jinsheng Lai jianru Zuo Zhizhong Gong Xiqing Wang Weiwei Jin zhaobin Dong Shuhua Yang State Key Laboratory of Plant Environmental Resilience Frontiers Science Center for Molecular Design BreedingCollege of Biological SciencesCenter for Crop Functional Genomics and Molecular BreedingChina Agricultural UniversityBeijing 100193China State Key Laboratory of Maize Bio-breeding National Maize Improvement CenterFrontiers Science Center for Molecular Design BreedingDepartment of Plant Geneticsand BreedingChinaAgricultural UniversityBeijingChina State Key Laboratory of Plant Genomics and National Plant Gene Research Center Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing100101China

Understanding how maize(Zea mays)responds to cold stress is crucial for facilitating breeding programs of cold-tolerant *** extensive utilization of the genome-wide association study(GWAs)approach for exploring favorable natural alleles associated with maize cold tolerance,few studies have successfully identified candidate genes that contribute to maize cold *** this study,we used a diverse panel of inbred maize lines collected from different germplasm sources to perform a GWAS on var-iations in the relative injured area of maize true leaves during cold stress-a trait very closely correlated with maize cold *** identified HsF21,which encodes a B-class heat shock transcription factor(HSF)that positively regulates cold tolerance at both the seedling and germination *** varia-tions in the promoter of the cold-tolerant HSF21Hap1 allele led to increased HSF21 expression under cold stress by inhibiting binding of the basic leucine zipper bziP68 transcription factor,a negative regulator of cold *** integrating transcriptome deep sequencing,DNA affinity purification sequencing,and targeted lipidomic analysis,we revealed the function of HsF21 in regulating lipid metabolism homeo-stasis to modulate cold tolerance in *** addition,we found that HsF21 confers maize cold tolerance without incurring yield ***,this study establishes HsF21 as a key regulator that en-hances cold tolerance in maize,providing valuable genetic resources for breeding of cold-tolerant maize varieties.

关键词： heat shock factor HSF21 cold tolerance natural variation bZiP68 lipid metabolism maize