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桑叶提取物-壳聚糖可食性涂膜对静宁烧鸡保鲜效果的研究

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食品与发酵工业 2024年第11期50卷 201-208页

作者：范小宁陈敬敬赵瑞娜包晓明郭雨轩师希雄甘肃农业大学食品科学与工程学院甘肃兰州730070

为延长静宁烧鸡的货架期,该试验以桑叶提取物为活性物质,壳聚糖为成膜基质,制备了复合涂膜,分别采用桑叶提取物添加量为0.3%、0.5%、0.7%(质量分数)的涂膜对静宁烧鸡进行处理,4℃贮藏,在0、3、6、9、12、15 d测定pH、挥发性盐基氮(total... 详细信息

为延长静宁烧鸡的货架期,该试验以桑叶提取物为活性物质,壳聚糖为成膜基质,制备了复合涂膜,分别采用桑叶提取物添加量为0.3%、0.5%、0.7%(质量分数)的涂膜对静宁烧鸡进行处理,4℃贮藏,在0、3、6、9、12、15 d测定pH、挥发性盐基氮(total volatile basic nitrogen,TVB-N)、硫代巴比妥酸(thiobarbituric acid reactive substances,TBARS)、菌落总数,并作感官评价。结果表明,0.3%、0.5%、0.7%的桑叶提取物涂膜都能够有效地延缓静宁烧鸡品质劣变,其中桑叶提取物添加量为0.7%的涂膜的保鲜效果最佳。与对照组相比,在贮藏15 d时,0.3%、0.5%、0.7%的涂膜处理组分别将静宁烧鸡中的pH值降低了2.26%、3.08%、3.57%,TBARS值降低了11.21%、20.56%、34.58%,TVB-N值降低了7.59%、12.00%、25.59%,感官评分有显著提高(P<0.05),菌落总数在第12天时未超过国标规定。若结合国标中规定的菌落总数和TVB-N这2种指标作为评价静宁烧鸡保质期的标准,则桑叶提取物-壳聚糖涂膜可有效延长静宁烧鸡保质期2~3 d。由此可见,桑叶提取物-壳聚糖涂膜可有效延长静宁烧鸡的保质期,该研究可为静宁烧鸡保鲜提供理论支持。

关键词：静宁烧鸡桑叶提取物可食性复合膜涂膜保鲜

FCOS-LSC:A Novel Model for Green Fruit Detection in a Complex Orchard Environment

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Plant Phenomics 2023年第3期5卷 546-563页

作者： ruina zhao Yujie Guan Yuqi Lu Ze Ji Xiang Yin Weikuan Jia School of Information Science and Engineering Shandong Normal UniversityJinan 250358China School of Engineering Cardiff UniversityCardiff CF243AAUK School of Agricultural Engineering and Food Science Shandong University of TechnologyZibo 255000China Key Laboratory of Facility Agriculture Measurement and Control Technology and Equipment of Machinery Industry Zhenjiang 212013China

To better address the difficulties in designing green fruit recognition techniques in machine vision systems,a new fruit detection model is *** model is an optimization of the FCOS(full convolution one-stage object detection)algorithm,incorporating LSC(level scales,spaces,channels)attention blocks in the network structure,and named *** method achieves efficient recognition and localization of green fruit images affected by overlapping occlusions,lighting conditions,and capture ***,the improved feature extraction network ResNet50 with added deformable convolution is used to fully extract green fruit feature *** feature pyramid network(FPN)is employed to fully fuse low-level detail information and high-level semantic information in a cross-connected and top-down connected ***,the attention mechanisms are added to each of the 3 dimensions of scale,space(including the height and width of the feature map),and channel of the generated multiscale feature map to improve the feature perception capability of the ***,the classification and regression subnetworks of the model are applied to predict the fruit category and bounding *** the classification branch,a new positive and negative sample selection strategy is applied to better distinguish supervised signals by designing weights in the loss function to achieve more accurate fruit *** proposed FCOS-LSC model has 38.65M parameters,38.72G floating point operations,and mean average precision of 63.0%and 75.2%for detecting green apples and green persimmons,*** summary,FCOS-LSC outperforms the state-of-the-art models in terms of precision and complexity to meet the accurate and efficient requirements of green fruit recognition using intelligent agricultural ***,FCOS-LSC can be used to improve the robustness and generalization of the green fruit detection models.

关键词： connected designing weights

Retrospective epidemiological study of thyroid nodules by ultrasound in asymptomatic subjects

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Chinese Medical Journal 2014年第9期127卷 1661-1665页

作者： Sharen Gaowa Zhang Bo zhao ruina Sun Jie Gai Xiaorong Lou Huiping Department of Health Management Peking Union Medical College Hospital Chinese Academy of Medical Sciences & Peking Union Medical College Beijing 100730 China Department of Ultrasound Peking Union Medical College Hospital Chinese Academy of Medical Sciences & Peking Union Medical College Beijing 100730 China

Background The purpose of this study was to conduct thyroid ultrasound examinations on a large sample of subjects and explore the occurrence,distribution,and characteristics of thyroid nodules and thyroid cancer to provide some information on the epidemic trend of thyroid nodules and *** The thyroid ultrasonic examination results of 19 895 healthy physical examinees who visited the Department of Health Management,Peking Union Medical College Hospital from January 2009 to December 2011 were analyzed retrospectively to determine the detection rate and characteristics of thyroid *** needle aspiration or surgical resection was suggested to subjects suspected of having thyroid *** The detection rate of thyroid nodules was 42.6％（8 480/19 895）,40.0％（4 661/11 678） in men and 46.5％（3 819/8 217） in *** detection rate noticeably increased with increasing *** detection rate of thyroid nodules by palpation was obviously lower than by ultrasonic examination in various age *** those with thyroid nodules,61.3％ were multiple and 38.7％ were solitary; multiple nodule was the major type both in men and ***-nine cases of malignant nodules were solitary,and 30 cases of malignant nodules were *** was no significant *** detection rate of thyroid cancer was 0.30％ for the entire group of examinees,and 0.15％ in men and 0.50％ in *** all sex and age groups,30-to 40-year-old women had the highest detection rate （0.76％）.The detection rate of thyroid nodules correlated with age,systolic blood pressure,height,and *** age and/or higher systolic blood pressure correlated with a higher detection rate,while smaller height and weight also correlated with a higher detection rate with significant ***,there were no significant correlations between the detection rate and diastolic blood pressure or body mass *** The detection of thyroid cancer increased significantly,especi

关键词： thyroid nodule thyroid cancer ultrasound epidemiology

基于虚拟超声模型的住院医师产科超声技能培训及考核

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中国毕业后医学教育 2024年第6期8卷 464-468页

作者：刘华祯赵瑞娜姜玉新李建初杨萌中国医学科学院北京协和医学院北京协和医院超声医学科北京100730

目的评价虚拟超声模型应用于第一年住院医师的产科超声规范化培训效果,并制定基于虚拟超声模型的规范化考核方案。方法选取2022年10月开始于北京协和医院超声医学科参加住院医师规范化培训的住院医师共14人。使用虚拟超声模型作为教... 详细信息

目的评价虚拟超声模型应用于第一年住院医师的产科超声规范化培训效果,并制定基于虚拟超声模型的规范化考核方案。方法选取2022年10月开始于北京协和医院超声医学科参加住院医师规范化培训的住院医师共14人。使用虚拟超声模型作为教具进行产科超声教学。由2名具备10年以上超声工作经验的评价者独立进行客观化评分。在培训前、后各进行一次考核并进行统计学分析。使用问卷调查方式记录住院医师自评及对虚拟超声模型教学效果的评价。结果两次考核的评价者间一致性较强,培训前及培训后评分的组内相关系数(ICC)分别为0.900、0.785。培训后住院医师考核总分及各要素评分均得到显著提升[(83.5分, IQR:74.1~89.4)比(99.0分,IQR:95.5~99.5, P=0.001)]。培训后住院医师的晚孕检查项目扫查时间显著缩短[(21.5±11.5)分钟比(14.6±5.6)分钟, P=0.009]。住院医师认为虚拟超声模型有效提升了产科超声操作能力,并提升了产科超声检查的信心。结论虚拟超声模型可用于第一年住院医师产科超声规范化培训及考核,为提升住院医师的临床工作胜任力提供了有效的工具方法。

关键词：虚拟超声模型住院医师规范化培训产科超声

呼吸机相关性肺炎病原菌分布特点及发病影响因素分析

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结核与肺部疾病杂志 2024年第4期5卷 305-310页

作者：赵瑞娜李淑花崔晓红弓巧巧裴俊丽袁丽荣山西医科大学第一医院呼吸与危重症医学科太原030001

目的:分析呼吸机相关性肺炎(ventilator associated pneumonia,VAP)患者的肺部病原菌分布情况,并探讨VAP发病的影响因素。方法:采用回顾性研究方法,选取2018年1月至2021年12月在山西医科大学第一医院及阳泉市第一人民医院接受机械通气... 详细信息

目的:分析呼吸机相关性肺炎(ventilator associated pneumonia,VAP)患者的肺部病原菌分布情况,并探讨VAP发病的影响因素。方法:采用回顾性研究方法,选取2018年1月至2021年12月在山西医科大学第一医院及阳泉市第一人民医院接受机械通气治疗的1164例患者作为研究对象,均留取痰标本进行病原菌检测。收集研究对象一般资料(年龄、性别、住院时间、手术情况)、机械通气时长及次数、尿管和中心静脉导管留置时长及次数、抗菌药物使用时长及次数、痰标本的病原菌情况等信息。分析VAP患者肺部病原菌分布特点,并应用多因素logistic回归模型探究研究对象发生VAP的影响因素。结果:1164例研究对象中,171例(14.69%)发生VAP。171例VAP患者下呼吸道分泌物或气管插管终端分泌物中共检出378株病原菌,其中,革兰阴性菌298株(78.84%),革兰阳性菌66株(17.46%),真菌14株(3.70%);肺炎克雷伯菌、鲍曼不动杆菌是主要病原菌,分别占23.81%(90/378)、14.81%(56/378)。多因素logistic回归分析显示,手术[OR(95%CI)=2.506(1.640~3.828)]、住院时间≥14 d[OR(95%CI)=2.749(8.424~28.968)],以及留置尿管[OR(95%CI)=14.208(5.285~38.192)]均是接受通气治疗患者发生VAP的独立影响因素。结论:条件致病菌是造成机械通气治疗患者呼吸道感染的主要致病菌;对于实施手术、住院时间较长,以及留置尿管的患者,要警惕其发生VAP的风险。

关键词：通气机,机械感染肺炎,呼吸机相关性因素分析,统计学

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大时延扩展CDMA信道下空时多用户检测

南京航空航天大学学报 2007年第2期39卷 204-207页

作者：张小飞赵瑞娜徐大专南京航空航天大学信息科学与技术学院南京210016 国家电力公司华东电力调度中心上海200002

提出了基于平行因子分析的大时延扩展CDM A信道下空时多用户检测算法。文中建立了大时延扩展CDM A信道下接收信号新模型,它将接收信号看成是2个三线性模型之和,并提出了广义三线性交替最小二乘的算法(TALS-G)进行空时多用户检测。仿真... 详细信息

提出了基于平行因子分析的大时延扩展CDM A信道下空时多用户检测算法。文中建立了大时延扩展CDM A信道下接收信号新模型,它将接收信号看成是2个三线性模型之和,并提出了广义三线性交替最小二乘的算法(TALS-G)进行空时多用户检测。仿真结果说明:TALS-G算法具有较好误码率性能,且该方法在阵列扰动情况下仍有较好的性能。它无需信道衰落系数和DOA信息,是盲信号检测方法,具有鲁棒性。

关键词：空时多用户检测平行因子分析 CDMA系统三线性模型时延扩展

Effect of pomegranate peel extract on the reduction of heterocyclic amines and quality characteristics of mutton meatballs

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Food Quality and Safety 2023年第2期7卷 240-248页

作者：陈敬敬师希雄赵瑞娜田铸张丽余群力陈骋 College of Food Science and Engineering Gansu Agricultural UniversityLanzhouChina

Pomegranate peel extract(PPE),rich in phenolic compounds,is an undervalued byproduct derived from processing ***,there are very few studies on the inhibitory effect of PPE on harmful substances during meat *** study was intended to investigate the influence of different concentrations of PPE(0.50%,1%,and 1.50%)on the generation of heterocyclic amines(HCAs)and some quality attributes in mutton *** samples with the addition of PPE(0,0.50%,1%,and 1.50%)were fried for different lengths of time(2.5 min and 5 min)at 175±5 C,and the contents of fourteen HCAs,color,thiobarbituric acid reactive substances,and carbonyl values of fried mutton meatballs were *** results showed that samples fried at 2.5 min had a low HCA content,and the HCA content enhanced signifi-cantly when the frying time was increased from 2.5 to 5 min(P<0.05).In comparison with the control group,PPE could significantly inhibit the generation of total HCAs in fried mutton meatballs(P<0.05),and the total HCAs content decreased with increasing PPE *** significantly reduced carbonyl andTBARS values in fried mutton meatballs(P<0.05).Moreover,PPE resulted in a significant increase in a*and b*values as well as a decrease in L*values in fried mutton meatballs(P<0.05).In conclusion,PPE could inhibit the formation of HCAs and improve the quality of mutton meatballs,and could be considered as a natural inhibitor of HCAs in fried meat products.

关键词： Pomegranate peel extract heterocyclic amines mutton meatballs quality

Long-pulse Nd:YAG 1064 nm Laser Treatment for Onychomycosis

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Long-pulse Nd:YAG 1064 nm Laser Treatment for Onychomycosis

Ultrastructural destruction in Trichophyton rubrum by long pulse Nd:YAG 1064nm Laser and potential role of reactive oxygen

中华医学会第十八次全国皮肤性病学术年会

作者： Zhang ruina,Zhuo Fenglin,zhao Junying Department of Dermatology,Beijing Friendship Hospital,Capital Medical University,

Background and objective Onychomycosis is a fungal persistent infection of the nail bed and plate.A combination of topical and oral antifungals is widely used to treat onychomycosis for many *** oral antifungal agents have made it possible to treat onychomycosis effectively,these durgs have considerable adverse liver and kidney effects in some population for long-term *** research shows that

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Ultrastructural destruction in Trichophyton rubrum by long p...