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植物乳杆菌R-1对发酵柠檬果汁风味和营养物质的影响

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轻工学报 2024年第3期39卷 29-37,53页

作者：费永涛刘东杰罗子淳杨晨张智坤马路凯刘功良肖更生仲恺农业工程学院轻工食品学院广东广州510225 仲恺农业工程学院/农业农村部岭南特色食品绿色加工与智能制造重点实验室/广东省岭南特色食品科学与技术重点实验室广东广州510225

以植物乳杆菌R-1为发酵菌种发酵柠檬果汁,测定发酵过程中柠檬果汁的活菌数、营养物质含量、抗氧化能力和挥发性风味物质含量,探究植物乳杆菌R-1对发酵柠檬果汁风味和营养物质的影响。结果表明:植物乳杆菌R-1在柠檬果汁中具有较好的发酵... 详细信息

以植物乳杆菌R-1为发酵菌种发酵柠檬果汁,测定发酵过程中柠檬果汁的活菌数、营养物质含量、抗氧化能力和挥发性风味物质含量,探究植物乳杆菌R-1对发酵柠檬果汁风味和营养物质的影响。结果表明:植物乳杆菌R-1在柠檬果汁中具有较好的发酵特性,在发酵36 h后活菌数达到最高值(4×10^(8) CFU/mL),此后趋于稳定;在发酵过程中,植物乳杆菌R-1能降低柠檬果汁中的总糖和有机酸含量,提高总酚含量,在发酵48 h时,总酚含量从最初的47.4 GAE mg/mL显著增加到174.3 GAE mg/mL,同时,发酵柠檬果汁的抗氧化能力(对DPPH和ABTS+自由基的清除能力)显著提高(P<0.05);植物乳杆菌R-1还能改变柠檬果汁中挥发性风味物质的种类和含量,尤其是D-柠檬烯、γ-松油烯等柠檬精油中的特征萜烯类风味物质,其相对含量在发酵24 h时达到最大值,感官评价结果也显示,此时发酵柠檬果汁在香味和口感方面均优于其他发酵时间点的样品。因此,植物乳杆菌R-1能很好地利用柠檬果汁中的营养物质进行生长代谢,并改善柠檬果汁的风味,提高其总酚及抗氧化功能物质的含量。

关键词：植物乳杆菌发酵柠檬果汁挥发性风味物质营养物质抗氧化能力

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用于销钉压装的非标设备研制与优化

光电技术应用 2024年第2期39卷 72-76页

作者：刘东杰张庆宇孟凡冬刘璐朱乐薛梅中国电子科技集团公司光电研究院天津辽宁大连

圆柱销作为通用件,常应用在机械领域,用于定位和连接零件,保证连接组件定位精度与连接强度。圆柱销与销钉孔采用过盈配合,保证安装组件连接与定位的紧固性和准确性。在机械装配生产应用中,保证销钉导入性和冲击压尤为重要。针对组件销... 详细信息

圆柱销作为通用件,常应用在机械领域,用于定位和连接零件,保证连接组件定位精度与连接强度。圆柱销与销钉孔采用过盈配合,保证安装组件连接与定位的紧固性和准确性。在机械装配生产应用中,保证销钉导入性和冲击压尤为重要。针对组件销钉装配,介绍一款以气液增压缸为动力源的销钉压装非标设备。气液传动形式兼具气压与液压优点,体积小,通过气泵提供动力源,运行平稳;通过专业软件搭建三维模型并完成系统电气回路运行仿真,通过对整体结构以及压装力数学建模计算,完成设备整体优化。

关键词：过盈配合气液增压缸压装力数学建模

Highly efficient Fe^(3+)-doped A_(2)BB′O_(6)(A=Sr^(2+),Ca^(2+);B,B′=In^(3+),Sb^(5+),Sn^(4+))broadband nearinfrared-emitting phosphors for spectroscopic analysis

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Light(Science & Applications) 2022年第5期11卷 969-978页

作者： dongjie liu Guogang Li Peipei Dang Qianqian Zhang Yi Wei Lei Qiu Maxim S.Molokeev Hongzhou Lian Mengmeng Shang Jun Lin State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of Sciences130022 ChangchunChina University of Science and Technology of China 230026 HefeiChina Faculty of Materials Science and Chemistry China University of Geosciences430074 WuhanChina Zhejiang Institute China University of Geosciences311305 HangzhouChina Laboratory of Crystal Physics Kirensky Institute of PhysicsFederal Research Center KSC SB RASKrasnoyarsk 660036Russia Institute of Engineering Physics and Radioelectronics Siberian Federal UniversityKrasnoyarsk 660041Russia Research and Development Department Kemerovo State UniversityKemerovo 650000Russia School of Material Science and Engineering Shandong University266071 JinanChina

Near-infrared(NIR)-emitting phosphor-converted light-emitting diodes have attracted widespread attention in various applications based on NIR *** for typical Cr^(3+)-activated NIR-emitting phosphors,next-generation Cr^(3+)-free NIR-emitting phosphors with high efficiency and tunable optical properties are highly desired to enrich the types of NIR luminescent materials for different application ***,we report the Fe^(3+)-activated Sr2−yCay(InSb)1−zSn_(2)zO_(6)phosphors that exhibit unprecedented long-wavelength NIR *** overall emission tuning from 885 to 1005 nm with broadened full-width at half maximum from 108 to 146 nm was realized through a crystallographic site engineering *** NIR emission was significantly enhanced after complete Ca^(2+)incorporation owing to the substitution-induced lower symmetry of the Fe^(3+)*** Ca_(2)InSbO_(6):Fe^(3+)phosphor peaking at 935 nm showed an ultra-high internal quantum efficiency of 87%.The as-synthesized emission-tunable phosphors demonstrated great potential for NIR spectroscopy *** work initiates the development of efficient Fe^(3+)-activated broadband NIR-emitting phosphors and opens up a new avenue for designing NIR-emitting phosphor materials.

关键词： spectroscopy materials spectroscopic

Spatiotemporal evolution and assembly processes of ammonia-oxidizing prokaryotic communities in 1 000-year-old coastal reclaimed soils

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Pedosphere 2024年第4期34卷 709-725页

作者： Sarfraz HUSSAIN Yifan YIN Senlin liu Shanshan YAN dongjie CHEN Hui CAO Feng WANG Key Laboratory of Agricultural Environmental Microbiology Ministry of Agriculture and Rural AffairsCollege of Life SciencesNanjing Agricultural UniversityNanjing 210095China Institute of Eco-Environmental Sciences Ningbo Academy of Agricultural SciencesNingbo 315040China

Coastal marshes are transitional areas between terrestrial and aquatic *** are sensitive to climate change and anthropogenic *** recent decades,the reclamation of coastal marshes has greatly increased,and its effects on microbial communities in coastal marshes have been studied with great *** of these studies have explained the short-term spatiotemporal variation in soil microbial community ***,the impact of reclamation on the community composition and assembly processes of functional microbes(e.g.,ammonia-oxidizing prokaryotes)is often *** this study,using quantitative polymerase chain reaction and the Ion S5™XL sequencing platform,we investigated the spatiotemporal dynamics,assembly processes,and diversity patterns of ammonia-oxidizing prokaryotes in 1000-year-old reclaimed coastal salt *** taxonomic and phylogenetic diversity and composition of ammonia oxidizers showed apparent spatiotemporal variations with soil *** null modelling-based analysis showed that across all sites,the archaeal ammonia-oxidizing community was assembled by a deterministic process(84.71%),and deterministic processes were also dominant(55.2%)for ammonia-oxidizing bacterial communities except for communities at 60 years of *** assembly process and nitrification activity in reclaimed soils were positively *** abundance of the amoA gene and changes in ammonia-oxidizing archaeal and bacterial diversities significantly affected the nitrification activity in reclaimed *** findings suggest that long-term coastal salt marsh reclamation affects nitrification by modulating the activities of ammonia-oxidizing microorganisms and regulating their community structures and assembly *** results provide a better understanding of the effects of long-term land reclamation on soil nitrogen-cycling microbial communities.

关键词： ammonia oxidizer beta nearest taxon index coastal salt marshes community assembly deterministic process nitrification rate stochastic process

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橄榄菜贮藏过程中营养及安全品质变化

食品研究与开发 2024年第20期45卷 165-171页

作者：徐玉娟王健霞刘袆帆王锋余元善肖更生刘东杰马路凯农业农村部岭南特色食品绿色加工与智能制造重点实验室仲恺农业工程学院轻工食品学院广东广州510631 广东省农业科学院蚕业与农产品加工研究所广东广州510610 西藏自治区农牧科学院农产品开发与食品科学研究所西藏拉萨850000

为研究橄榄菜贮藏过程中的品质变化,对橄榄菜水分含量、食盐含量、糖分含量、脂肪含量、脂肪酸含量、亚硝酸盐含量、反式脂肪酸含量、丙烯酰胺含量进行检测;采用气相色谱-离子迁移谱(gas chromatography-ionmobility spectrometry,GC-I... 详细信息

为研究橄榄菜贮藏过程中的品质变化,对橄榄菜水分含量、食盐含量、糖分含量、脂肪含量、脂肪酸含量、亚硝酸盐含量、反式脂肪酸含量、丙烯酰胺含量进行检测;采用气相色谱-离子迁移谱(gas chromatography-ionmobility spectrometry,GC-IMS)技术检测橄榄菜挥发性物。结果显示,在25℃贮藏条件下,水分含量为(2.04±0.04)~(2.33±0.05)g/100 g,食盐含量为(3.10±0.08)%~(4.41±0.03)%,糖分含量为(0.17±0.00)%~(1.10±0.02)%,脂肪含量为(33.70±0.35)%~(46.20±0.37)%,理化指标的变化对橄榄菜品质的影响较小。不饱和脂肪酸含量随贮藏时间的延长而增加,饱和脂肪酸含量随贮藏时间的延长而下降,脂肪酸与挥发性物质具有一定的相关性;总反式脂肪酸含量随贮藏时间的延长而下降;亚硝酸盐含量先升高后降低,贮藏21 d时达到“亚硝峰”23 mg/kg,已超过GB 2762—2017《食品安全国家标准食品中污染物限量》中规定的亚硝酸盐含量指标,21 d后,亚硝酸盐含量逐渐下降;橄榄菜在贮藏过程中未检出丙烯酰胺(<0.005%);橄榄菜在25℃条件下储存35 d品质良好。

关键词：橄榄菜营养理化指标品质变化规律

Reexamination of Radiolarian Biostratigraphy in Permian in Pelagic Chert Sequences at Dachongling Section, South China

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Journal of China University of Geosciences 2002年第3期13卷 207-214页

作者： Sun Dongying Xia Wenchen liu dongjie Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074 Faculty of Earth Sciences China University of Geosciences Wuhan 430074

Permian radiolarian biostratigraphy was reexamined in the bedded chertsection in Qinzhou area of southeast Guangxi Zhuang Autonomous Region, South China. On the basis ofthe analyses of characteristic radiolarian composition, six radiolarian zones are recognized,namely, Pseudoalbaillella longtanensis Zone, Pseudoalbaillella globosa Zone, Follicucullusmonacanthus Zone, Follicucullus scholasticus Zone, Follicucullus charveti Zone and Neoalbaillellaornithoformis Zone, in ascending order. Correlation of these radiolarian zones with those in Japanis presented. The Neoalbaillella ornithoformis Zone was firstly discovered in Dachongling Section,which may indicate that pelagic chert of the late Permian existed there, according to theco-occurring conodonts.

关键词： permian pelagic chert radiolarian zones biostratigraphy

康复机器人结合动作观察疗法对脑卒中患者上肢运动功能康复的影响

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武警医学 2024年第2期35卷 112-115页

作者：唐迪王方王心刚李月崔向红刘东杰王丽丽联勤保障部队大连康复疗养中心全军神经系统疾病康复中心 116013

目的观察康复机器人结合动作观察疗法对脑卒中患者上肢运动功能康复的作用。方法选择2022年4-12月在联勤保障部队大连康复疗养中心就诊的初发脑卒中患者46例(病程0.05);治疗后,两组FMA-UE、MAS-UE、MBI均显著提高(P<0.001);治疗后,试验... 详细信息

目的观察康复机器人结合动作观察疗法对脑卒中患者上肢运动功能康复的作用。方法选择2022年4-12月在联勤保障部队大连康复疗养中心就诊的初发脑卒中患者46例(病程0.05);治疗后,两组FMA-UE、MAS-UE、MBI均显著提高(P<0.001);治疗后,试验组FMA-UE(P=0.039)、MAS-UE(P=0.027)、MBI(P=0.004)高于对照组,差异具有统计学意义。结论康复机器人结合动作观察疗法,能够进一步改善脑卒中患者的上肢运功功能,提高日常生活活动能力。

关键词：脑卒中上肢康复机器人动作观察疗法上肢运动

Polymorphism of FSHβ Subunit Gene in Six Pig Breeds

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Journal of Northeast Agricultural University(English Edition) 2010年第1期17卷 62-64页

作者： ZHANG dongjie liu Di YANG Guowei Heilongjiang Academy of Agricultural Sciences Harbin 150086 China

The follicle stimulating hormone beta-subunit （FSHβ） gene plays an important role in piglets. Marker-assisted selection （MAS） in conjunction with traditional selection methods is most effective for improving the piglets breeding traits. To find the new SNPs, the polymorphism of it in six pig breeds （Min, Landrace, Yorkshine, Duroc, wild boar, and wild boar × Landrace） was analyzed by using PCR-SSCP and was further compared with each other. Polymorphism was found and the sequencing results showed that there was one silent mutation on exon2 （C48T） and two mutations on exon3 （T422C and A514G）. Genotype distribution of FSHβ in Min and wild boar on exon3 was in accordance with Hardy-Weinberg Law.

关键词： pig FSHβ polymorphism PCR-SSCP

Effect of Ice-Temperature and Spermidine on Chilling Sensitivity of Pepper

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Food and Nutrition Sciences 2013年第2期4卷 156-162页

作者： dongjie liu Guoliang Sui Yongzhou He Ji liu Wen Qin College of Food Science Sichuan Agricultural University Ya’an China.

The peppers which were treated at ice-temperature for 6 hours and 1 mmol/L spermidine for 10 min, followed by cold storage (4℃ ± 1℃) respectively were investigated. The results indicated that the chilling injury was delayed and reduced by ice-temperature and spermidine treatments. Comparing with control group, ice-temperature and spermidine exerted significant effects on reduction of ascorbic acid (Vc) and chlororphyll contents, relatively high activity of superoxide dismutase (SOD), accumulation of malondialdehyde (MDA) as well as the increase of cell membrane penetrability. The results indicated that the spermidine and ice-temperature induced the activity of antioxidant enzyme SOD and maintained higher defence-related compound Vc as well as lower levels of membrane lipid peroxidation, which may be associated with chilling injury alleviation. There was a difference between ice-temperature treatment and spermidine treatment after 30 days. The results suggested that spermidine was more effective in reducing chilling sensitivity and prolonging storage of peppers.

关键词： Spermidine Ice-Temperature Pepper Chilling Insensitivity