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Anisotropy-free arrayed waveguide gratings on X-cut thin film lithium niobate platform of in-plane anisotropy

Light(Science & Applications) 2024年第7期13卷 1416-1426页

作者： junjie yi Changjian Guo Ziliang Ruan Gengxin Chen Haiqiang Wei Liwang Lu Shengqi Gong Xiaofu Pan Xiaowan Shen Xiaowei Guan Daoxin Dai Kangping Zhong Liu Liu State Key Laboratory of Extreme Photonics and Instrumentation College of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZhejiang UniversityHangzhou 310058China. Guangdong Provincial Key Laboratory of Optical Information Materials and Technology South China Academy of Advanced OptoelectronicsSouth China Normal UniversityHigher-Education Mega-CenterGuangzhou 510006China. National Center for International Research on Green Optoelectronics South China Normal UniversityGuangzhou 510006China Photonics Research Institute Department of Electrical and Electronic EngineeringThe Hong Kong Polytechnic UniversityHung HomKowloonHong Kong(SAR)China. Jiaxing Key Laboratory of Photonic Sensing&Intelligent Imaging Intelligent Optics&Photonics Research CenterJiaxing Research Institute Zhejiang UniversityJiaxing 314000China

Arrayed waveguide grating is a versatile and scalable integrated light dispersion device,which has been widely adopted in various applications,including,optical communications and optical ***,thin-film lithium niobate emerges as a promising photonic integration platform,due to its ability of shrinking largely the size of typical lithium niobate based optical *** would also enable multifunctional photonic integrated chips on a single lithium niobate ***,due to the intrinsic anisotropy of the material,to build an arrayed waveguide grating on X-cut thin-film lithium niobate has never been ***,a universal strategy to design anisotropyfree dispersive components on a uniaxial in-plane anisotropic photonic integration platform is introduced for the first *** leads to the first implementation of arrayed waveguide gratings on X-cut thin-film lithium niobate with various configurations and *** best insertion loss of 2.4 dB and crosstalk of−24.1 dB is obtained for the fabricated arrayed waveguide grating *** of such arrayed waveguide gratings as a wavelength router and in a wavelength-division multiplexed optical transmission system are also demonstrated.

关键词： waveguide arrayed lithium

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乳酸菌抗氧化机制研究进展及在食品领域的应用

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食品科学 2024年第13期45卷 345-355页

作者：尹树磊杜香张小希刘璐易俊洁王艳菲昆明理工大学食品科学与工程学院云南省高原特色食品预制化重点实验室昆明市绿色食品加工国际科技研发中心云南昆明650500

乳酸菌不仅有助于改善发酵食品的风味,提高营养价值,还有助于预防由于氧化反应而引发的多种疾病。这些有益功能的发挥与乳酸菌的抗氧化活性密不可分。本文详细阐述了乳酸菌的抗氧化机制,包括调节抗氧化酶类、调控信号通路、清除自由基... 详细信息

乳酸菌不仅有助于改善发酵食品的风味,提高营养价值,还有助于预防由于氧化反应而引发的多种疾病。这些有益功能的发挥与乳酸菌的抗氧化活性密不可分。本文详细阐述了乳酸菌的抗氧化机制,包括调节抗氧化酶类、调控信号通路、清除自由基系统、抑制脂质过氧化作用及金属离子螯合作用;总结了乳酸菌的抗氧化特性在乳制品、肉制品、水产品和果蔬制品等领域的应用现状;概述了乳酸菌抗氧化活性的体外和体内评估方法,旨在为乳酸菌在食品加工领域的深层次应用提供相关参考。

关键词：乳酸菌抗氧化活性作用机制食品加工评估方法

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加工方式和贮存条件对酸渍小米辣品质特性的影响

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食品与发酵工业 2024年第17期50卷 118-127页

作者：鲍玺张诗瑶肖玥王新瑜胡小松易俊洁昆明理工大学食品科学与工程学院云南昆明650500 云南省特色果蔬健康产品工程研究中心云南昆明650500 昆明市国际绿色食品加工研究与开发中心云南昆明650500 中国农业大学食品科学与营养工程学院北京100083

酸渍小米辣作为一种重要的调味品,因其独特的风味特性在西南地区备受消费者的喜爱。该研究对比探究了热加工[(thermal processing,TP),80℃,20 min]、超高压加工[(high-pressure processing,HPP),600 MPa,5 min]和添加防腐剂焦亚硫酸钠[... 详细信息

酸渍小米辣作为一种重要的调味品,因其独特的风味特性在西南地区备受消费者的喜爱。该研究对比探究了热加工[(thermal processing,TP),80℃,20 min]、超高压加工[(high-pressure processing,HPP),600 MPa,5 min]和添加防腐剂焦亚硫酸钠[(sodium metabisulfite,SMS),0.1 g/kg]对酸渍小米辣品质的影响,并进一步分析了不同贮存条件(贮存温度25、37、42℃,30 d)下其品质的变化规律。结果表明,TP和HPP显著灭活了酸渍小米辣中96%以上的微生物。然而,TP对酸渍小米辣的品质特性影响最大,TP使得酸渍小米辣由绿色变为黄色,叶绿素含量显著下降55.86%,总酚和总黄酮含量分别下降了29.68%和63.93%,抗氧化能力也降低了6.05%~6.67%。而HPP和SMS对酸渍小米辣品质特性的影响远小于热处理。贮存条件引起的品质劣变远大于加工工艺的影响。贮存前期(0~14 d)酸渍小米辣中的菌落总数呈上升趋势,贮存后期菌落总数下降。37、42℃抑制了霉菌酵母的生长(未检出)。在整个酸渍小米辣贮存过程中,亚硝酸盐含量均未超出国标限量。此外,在贮存过程,随着贮存温度升高,酸渍小米辣L^(*)值越低,a^(*)值越高,b^(*)值越低,褐变程度也越高,总酚、总黄酮含量显著降低(分别降低了47.30%~70.49%和36.10%~91.23%),抗氧化能力也维持在较低水平(48.91%~51.42%)。总之,TP和贮存会引起酸渍小米辣品质的劣变,高温贮存(37、42℃)会加速这一过程。该文可以为酸渍小米辣的工业化生产提供理论依据和指导。

关键词：酸渍小米辣超高压处理高温贮存品质特性

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活菌制剂保护剂的作用机制与应用前景

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食品与生物技术学报 2024年第4期43卷 35-45页

作者：梁嘉倩章子颜安俊林周琳棚刘志佳易俊洁昆明理工大学食品科学与工程学院云南昆明650500 云南省高原特色食品预制化重点实验室云南昆明650500 云南省特色果蔬健康产品工程研究中心云南昆明650500 昆明市绿色食品加工国际科技研发中心云南昆明650500

活菌制剂因其独特的生物活性、稳定性以及便利性而被广泛应用于食品、化妆品、农业、环境治理以及医疗等多个领域。作者综述了菌种生理结构以及活菌制剂在生产加工及储藏过程中失活的影响因素,并分别列举了蛋白质、糖、脂质以及其他成... 详细信息

活菌制剂因其独特的生物活性、稳定性以及便利性而被广泛应用于食品、化妆品、农业、环境治理以及医疗等多个领域。作者综述了菌种生理结构以及活菌制剂在生产加工及储藏过程中失活的影响因素,并分别列举了蛋白质、糖、脂质以及其他成分作为保护基质在活菌制剂中的作用机理,总结了不同属、不同生理状态的菌株对保护剂的不同需求,旨在为活菌制剂保护剂的开发和选择提供研究思路。

关键词：活菌制剂细胞损伤保护剂作用机制应用

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Petroleum Distribution Characteristics of the Americas and the Exploration Prospect Analysis

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Acta Geologica Sinica(English Edition) 2018年第1期92卷 378-393页

作者： HAO Qingqing LI Lintao ZUO yinhui CHEN Weijun WU Lei yi junjie Institute of Mineral Resources Research China Metallurgical Geology Bureau Beijing 101300 China CNOOC Research Institute Beijing 100028 China College of Energy Resources Chengdu University of Technology Chengdu 610059 Sichuan China

The world＇s present demand for oil and gas is still in a rapid growth period, and traditional oil and gas resources account for more than 60% of the global oil and gas supply. The Americas is the world＇s second largest production and consumption center of liquid fuel, and is also the world＇s largest natural gas producer. In 2016, the Americas had 85.3 billion tons of proven oil reserves and 18.7 trillion m3 of proven natural gas reserves, which account for 35.4% and 10.0% of world＇s total reserves, respectively. It produced 1267.1 Mt of oil and 1125.4 billion m3 of natural gas, which account for 28.9% and 31.7% of the world＇s total production, respectively. The crude oil and natural gas reserves are mainly distributed in the U.S., Canada and Venezuela. The U.S. is the earliest and most successful country in shale gas exploration and development, and its shale gas is concentrated in the southern, central and eastern U.S., including the Marcellcus shale, Barnett shale, EagleFord shale, Bakken shale, Fayettevis shale, Haynsvill shale, Woodford shale and Monterey/Santos shale. The potential oil and gas resources in the Americas are mainly concentrated in the anticline and stratigraphic traps in the Middle- Upper Jurassic slope deposition of the North Slope Basin, the Paleozoic Madsion group dolomite and limestone in the Williston Basin, dominant stratigraphic traps and few structural traps in the Western Canada Sedimentary Basin, the Eocene structural-stratigraphic hydrocarbon combination, structural- unconformity traps and structural hydrocarbon combination, and the Upper Miocene stratigraphic- structural hydrocarbon combination in the Maracaibo Basin of Venezuela, the stratigraphic-structural traps and fault horst, tilting faulted blocks and anticlines related to subsalt structure and basement activity in the Campos Basin, the subsalt central low-uplift belt and supra-salt central low-uplift belt in the Santos Basin of Brazil, and the structural-stratigraphic traps in

关键词： Americas oil and gas supply and demand U.S. Canada Venezuela unconventional oil andgas resources

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The Distribution of Petroleum Resources and Characteristics of Main Petroliferous Basins along the Silk Road Economic Belt and the 21st-Century Maritime Silk Road

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Acta Geologica Sinica(English Edition) 2017年第4期91卷 1457-1486页

作者： HAO Qingqing ZUO yinhui LI Lintao CHEN Weijun yi junjie WU Lei Institute of Mineral Resources Research China Metallurgical Geology Bureau Beijing 101300 China College of Energy Resources Chengdu University of Technology Chengdu 610059 Sichuan China CNOOC Research Institute Beijing 100028 China

The Silk Road Economic Belt and the 21st-Century Maritime Silk Road Initiative, abbreviated as the Belt and Road Initiative, is a primary development strategy of China＇s future international cooperation. Especially, the energy resource cooperation, including oil and gas resources cooperation, is an important part of this initiative. The Belt and Road has undergone complicated geological evolution, and contains abundant mineral resources such as oil, gas, coal, uranium, iron, copper, gold and manganese ore resources. Among these, Africa holds 7.8% of the world＇s total proven oil reserves. The oil and gas resources in Africa are relatively concentrated, with an overall low exploration degree and small consumption demand. Nigeria and Libya contain the most abundant oil resources in Africa, accounting for 2.2% and 2.9% of the world＇s total reserves, respectively. Nigeria and Algeria hold the richest natural gas resources in Africa, occupying 2.8% and 2.4% of the world＇s total reserves, respectively. Africa＇s oil and gas resources are mainly concentrated in Egypt, Sultan and Western Sahara regions in the northern Africa, and the Gulf of Guinea, Niger River and Congo River area in the western Africa. The Russia--Central Asia area holds rich petroleum resources in Russia, Kazakhstan, Turkmenistan and Uzbekistan. The potential oil and gas areas include the West Siberia Basin, East Siberia Basin and sea continental shelf in Russia, the northern and central Caspian Basin in Kazakhstan, the right bank of the Amu-Darya Basin, the East Karakum uplift and the South Caspian Basin in Turkmenistan, and the Amu-Daria Basin, Fergana Basin, Afghan-Tajik Basin and North Ustyurt Basin in Uzbekistan. The Middle East oil and gas resources are mainly distributed in the Zagros foreland basin and Arabian continental margin basin, and the main oil-producing countries include Saudi Arabia, Iran and Iraq. The Asia Pacific region is a new oil and gas consumption center, with rapid growth of oil a

关键词： petroliferous basin pay zone Africa Middle East Central Asia Russia Asia Pacific region

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Multi-stage gas diffusion and its implications for the productivity of coalbed methane in the southern Qinshui Basin, north China

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Frontiers of Earth Science 2023年第1期17卷 109-120页

作者： Hui WANG Yanbin YAO Zhentao LI Yanhui YANG junjie yi Yongkai QIU Shengqiang ZHOU School of Energy Resource China University of GeosciencesBeijing 100083China Coal Reservoir Laboratory of National Engineering Research Center of CBM Development&Utilization China University of GeosciencesBeijing 100083China State Key Laboratory of Organic Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China PetroChina Huabei Oilfield Company Renqiu 062552China Institute of Mineral Resources Research Beijing 101300China

The behavior of coalbed methane(CBM)diffusion considerably influences gas *** on the multi-porous diffusion model and on-site CBM desorption data of coal cores,the behavior of CBM diffusion and its implications on the gas productivity of No.3 coal seam in the southern Qinshui Basin(SQB)were elaborately *** indicate that CBM diffusion of No.3 coal seam demonstrates noticeable three-stage characteristics,including the fast diffusion,transitional diffusion,and slow diffusion *** the gas diffusion process,the gas content and/or the degree of developed pores and fractures/cleats in coal seams can affect the desorption of CBM and the amount of diffused CBM by influencing the changes in gas pressure in pores,thus controlling the behavior of gas diffusion in different *** gas content and the developed degree of pores and fractures/cleats are closely associated with the deformation degree of the coal seams,variably deformed coal seams exhibit unique characteristics of gas *** low-deformation degree of the coal seams have a relatively uniform distribution of gas production over the history of a *** contrast,the moderate-deformation degree of the coal seams have a relatively high rate and amount of gas diffusion in the fast and transitional diffusion stages,producing most of the gas in the early-to-intermediate stages of the ***,the high-deformation degree of the coal seams has a high rate and amount in the fast diffusion stage,indicating that most of the production stage occurs during the early stage of the gas production history of a *** summary,the behavior of gas diffusion can be used for predicting gas production potential.

关键词： coalbed methane gas diffusion CBM production coal deformation Qinshui Basin

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Lyase Activities of Heterologous CpcS and CpcT for Phycocyanin Holo-β-subunit from Arthrospira platensis in Escherichia coli

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Journal of Ocean University of China 2014年第3期13卷 497-502页

作者： yi junjie XU Di ZANG Xiaonan YUAN Dingyang ZHAO Bingran TANG Li TAN Yanning ZHANG Xuecheng Key Laboratory of Marine Genetics and Breeding (Ocean University of China) Ministry of Education State Key Laboratory of Hybrid Rice Hunan Hybrid Rice Research Center

Arthrospira platensis is an economically important cyanobacterium; and it has been used widely in food and pharmaceutical industries. The phycocyanin(PC) from A. platensis is extremely valuable in medicine and molecular biology due to its antioxidation and anti-tumoring activity and applicability as fluorescence protein tag. In present study, two recombinant plasmids, one contained the phycocyanobilin(PCB)-producing genes(hox1 and pcyA) while the other contained the phycobiliprotein gene(cpcB) and the lyase gene(either cpcS/U or cpcT), were constructed and synchronically transferred into E. coli in order to test the the activities of relevant lyases for catalysing PCB addition to CpcB during synthesizing fluorescent PC holo-β-subunit(β-PC) of A. platensis. As was evidenced by the fluorescence emitted at a peak specific for PC, CpcB was successfully synthesized in E. coli, to which co-expressed PCBs attached though at a relatively low efficiency. The results showed that the attachment of PCBs to CpcB were carried out mainly by co-expressed CpcS/U but CpcB also showed some autocatalytic activity. Currently, no CpcT activity was detected in this E. coli expression system. Further studies will be conducted to improve the efficiency of fluorescent PC synthesis in E. coli.

关键词： Arthrospira CpcB phycocyanobilin lyase CpcS CpcT

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A new strategy for full-length Ebola virus glycoprotein expression in ***

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Virologica Sinica 2016年第6期31卷 500-508页

作者： junjie Zai yinhua yi Han Xia Bo Zhang Zhiming Yuan Key Laboratory of Agricultural and Environmental Microbiology Wuhan Institute of Virology Chinese Academy of Sciences Wuhan 430071 China University of Chinese Academy of Sciences Beijing 100049 China Key Laboratory of Special Pathogens and Biosafety Center for Emerging Infectious Diseases WuhanInstitute of Virology Chinese Academy of Sciences Wuhan 430071 China

Ebola virus(EBOV) causes severe hemorrhagic fever in humans and non-human primates with high rates of fatality. Glycoprotein(GP) is the only envelope protein of EBOV, which may play a critical role in virus attachment and entry as well as stimulating host protective immune ***, the lack of expression of full-length GP in Escherichia coli hinders the further study of its function in viral pathogenesis. In this study, the vp40 gene was fused to the full-length gp gene and cloned into a prokaryotic expression vector. We showed that the VP40-GP and GP-VP40 fusion proteins could be expressed in *** at 16 ℃. In addition, it was shown that the position of vp40 in the fusion proteins affected the yields of the fusion proteins, with a higher level of production of the fusion protein when vp40 was upstream of gp compared to when it was downstream. The results provide a strategy for the expression of a large quantity of EBOV full-length GP, which is of importance for further analyzing the relationship between the structure and function of GP and developing an antibody for the treatment of EBOV infection.

关键词： Ebola virus (EBOV) glycoprotein (GP) E.coli prokaryotic expression

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Ferritin nanocage loading LYC for improving BBB transcytosis and attenuating D-gal-induced apoptosis in PC12 cells

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Food Science and Human Wellness 2023年

作者： Xiaoyu Xia Han Li Xianbing Xu Zhenyu Wang junjie yi Guanghua Zhao Ming Du School of Food Science and Technology， Dalian Polytechnic University College of Food Science and Nutritional Engineering， China Agricultural University Faculty of Food Science and Engineering， Kunming University of Science and Technology National Engineering Research Centre of Seafood Dalian Collaborative Innovation Centre of Provincial and Ministerial Co-construction for Seafood Deep Processing

Aging is a physiological process that leads to degeneration and functional decline of the brain. This is accompanied by intracellular peroxidation and neuronal apoptosis. Natural antioxidants possess a remarkable effect on attenuating the oxidative stress cascade and apoptosis of neurons; however， the challenge of using natural antioxidants for neuroprotection is fabricating a delivery system to overcome the blood-brain barrier (BBB) transport. Herein， we successfully created a stable delivery platform built on rigid ferritin nanocage loading natural lycopene (LYC) molecules， crossing the BBB in quantity and being taken up in neurons. This nanoparticle worked on D-galactose-induced senescence via alleviating neuronal hyperoxidation injury and weakening neuronal apoptosis in PC12 and BV2 cells. More importantly， this natural delivery system possesses inherent biocompatibility and potential application in improving the bioavailability of bioactive edible compounds with low water solubility. This study demonstrated the effectiveness of natural antioxidant nanomedicines in maintaining the defenses of intracerebral peroxidation and improve degenerating neurons， providing the potential to combat further imbalances of neuronal microenvironment in aging neuropathy.

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