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基于超声-光声多模态成像仪器的骨结构及成分高分辨率表征方法

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仪器仪表学报 2024年第6期45卷 177-187页

作者：谢强李博艺杨春山韩帅他得安复旦大学信息科学与工程学院上海200433 复旦大学工程与应用技术研究院生物医学工程技术研究所上海200433

早期诊断和治疗骨质疏松症能显著降低骨折风险。骨组织物理结构和生化成分的影像学检查对骨质疏松症的诊断具有重要意义。为了克服基于射线的骨骼健康检查技术存在电离辐射,无法表征骨组织生化成分等问题,本文设计了一套超声-光声多模... 详细信息

早期诊断和治疗骨质疏松症能显著降低骨折风险。骨组织物理结构和生化成分的影像学检查对骨质疏松症的诊断具有重要意义。为了克服基于射线的骨骼健康检查技术存在电离辐射,无法表征骨组织生化成分等问题,本文设计了一套超声-光声多模态成像仪器。该仪器由波长实时可调的激光器、多模时序控制器、超声数据采集与控制器、高速数据交换与传输模块组成,利用时分复用和异步成像策略原位采集超声和光声信号,结合高分辨率成像算法获得骨组织的超声-光声影像。松质骨仿体和牛松质骨的离体试验以及手指关节在体试验结果表明,所提出的超声-光声多模态成像仪器在骨质疏松症的诊断中具有潜在的应用价值,为全面评价骨骼健康的临床研究奠定了基础。

关键词：骨质疏松超声-光声成像仪骨结构及成分表征高分率骨成像

Necrotizing Pneumonia and Conservative Treatment: A Case Report and Review of the Literature

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Open Journal of Respiratory diseases 2024年第3期14卷 69-76页

作者： Pedro Rogerio Magalhães Braga Eduarda Kipper Beck Carolina de Mello Viera Cecília Gatti Wolff Laura Gazal Passos Guilherme Bastos de Mello Luis Felipe Pilar Gomes Giacomo Farias Tramontin ta.se Rosa de Carvalho Department of Internal Medicine Hospital So Lucas da PUCRS Porto Alegre Brazil School of Medicine Pontifcia Universidade Catlica do Rio Grande do Sul Porto Alegre Brazil Department of Radiology Hospital So Lucas da PUCRS Porto Alegre Brazil

We present a case of necrotizing pneumonia in an 87-year-old man without severe respiratory insta.ility. Clinical suspicion arose due to the need for supplementa.y oxygen and persistent fever during treatment for community-acquired pneumonia. The diagnosis was confirmed by chest computed tomography. Although necrotizing pneumonia typically requires major surgical intervention upon diagnosis, we chose conservative management with antimicrobials and chest drainage alone. The patient experienced significant improvement and resolution of pneumonia with conservative management.

关键词： Respiratory Tract Infections Lung disease Bacterial Pneumonia

Soil Respiration, Microbial Biomass and Nutrient Availability in Soil After Addition of Residues with Adjusted N and P Concentrations

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Pedosphere 2017年第1期27卷 76-85页

作者： Trung ta.NGUYEN Petra MARSCHNER School of Agriculture Food and Wine The University of Adelaide Adelaide 5005 (Australia)

Microbial activity and nutrient release are known to be influenced by organic matter properties,but it is difficult to separate the effect of C/N ratio from that of C/P ratio because in most plant residues both ratios are either high or *** incubation experiment was conducted to investigate the effects of reducing the C/N and C/P ratios of slowly decomposable plant residues(young eucalyptus leaves,mature wheat straw,and sawdust) to those of rapidly decomposable residues(young kikuyu shoots) on soil respiration,microbial biomass,and N and P *** C/N and C/P ratios of the former were adjusted to 15 and 89,respectively,by adding N as(NH_4)_2SO_4,P as KH_2PO_4 or both and residues were added at 10 g C kg-1 to a silt *** respiration was measured over21 d;microbial biomass C(MBC) and available N and P were measured on days 0,7,and *** to the unamended soil,addition of kikuyu increased cumulative respiration 20-fold,MBC concentration 4 to 8-fold,and available P concentration up to4-fold,whereas the increase in available N concentration was small and *** respiration and MBC concentration were low in the sawdust-amended soil and were not influenced by reducing the C/N and C/P *** respiration with original wheat and eucalyptus was 30%-40%of that with *** the C/N ratio alone or both C/N and C/P ratios increased cumulative respiration and MBC concentration 2-fold compared to the original wheat and eucalyptus,whereas reducing the C/P ratio had little *** the experiment,the available N concentration after addition of residues with reduced C/N ratio increased in the following order of eucalyptus < wheat < *** independently lowering the C/N and C/P ratios,microbial activity was more limited by C and N than ***,lowering the C/N ratio of very slowly decomposable sawdust had no effect on soil respiration and MBC concentration,suggesting that other properties such as concentration of poor

关键词： C/N ratio C/P ratio microbial activity nutrient immobilisation nutrient mineralisation

Sorption of Water-Extracta.le Organic Carbon in Various Clay Subsoils: Effects of Soil Properties

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Pedosphere 2016年第1期26卷 55-61页

作者： Trung ta.NGUYEN Petra MARSCHNER School of Agriculture Food and Wine The University of Adelaide

Clay-rich subsoils are added to sandy soils to improve crop yield and increase organic carbon （C） sequestration; however, little is known about the influence of clay subsoil properties on organic C sorption and desorption. Batch sorption experiments were conducted with nine clay subsoils with a range of properties. The clay subsoils were shaken for 16 h at 4 ℃with water-extracta.le organic C （WEOC, 1 224 g C L-1） from mature wheat residue at a soil to extract ratio of 1：10. After removal of the supernata.t, the residual pellet was shaken with deionised water to determine organic C desorption. The WEOC sorption was positively correlated with smectite and illite contents, cation exchange capacity （CEC） and tota. organic C, but negatively correlated with kaolinite content. Desorption of WEOC expressed as a percenta.e of WEOC sorbed was negatively correlated with smectite and illite contents, CEC, tota. and exchangeable calcium （Ca） concentrations and clay content, but positively correlated with kaolinite content. The relative importa.ce of these properties varied among soil types. The soils with a high WEOC sorption capacity had medium CEC and their dominant clay minerals were smectite and illite. In contrast, kaolinite was the dominant clay mineral in the soils with a low WEOC sorption capacity and low-to-medium CEC. However, most soils had properties which could increase WEOC sorption as well as those that could decrease WEOC sorption. The relative importa.ce of properties increasing or decreasing WEOC sorption varied with soils. The soils with high desorption had a low tota. Ca concentration, low-to-medium CEC and low clay content, whereas the soils with low desorption were characterised by medium-to-high CEC and smectite and illite were the dominant clay minerals. We conclude that WEOC sorption and desorption depend not on a single property but rather a combination of several properties of the subsoils in this study.

关键词： cation exchange capacity, clay mineral illite, kaolinite smectite

Management of Vulnating Esophageal Foreign Bodies in Burkina Faso

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International Journal of Otolaryngology and Head & Neck Surgery 2024年第2期13卷 135-148页

作者： Ibrahima diallo Aboubacar Gouéta.Alseny Camara Assoumi Anatou Biga Mama Brigitte Ouoba Edi Emmanuel Martial Nao Mousta.ha Sérémé Bertin Priva Ouédraogo Yvette Marie Chanta. Gyébré Abdoulaye Keita.Alpha Oumar diallo ENT and HNS Department Yalgado Ouédraogo University Hospital Ouagadougou Burkina Faso ENT and HNS Department Bogodogo University Hospital Ouagadougou Burkina Faso ENT and HNS Department Tengandogo University Hospital Ouagadougou Burkina Faso ENT and HNS Department Conakry University Hospital Conakry Guinea

Introduction: Esophageal foreign bodies (EFB) are a diagnostic and therapeutic emergency because of the serious complications they can cause. Aim: This paper aimed to study the vulnating esophageal foreign bodies in the ENT and Head and Neck Surgery departments of the Yalgado Ouedraogo and Bogodogo University Hospita.. Methodology: This was an analytic cross-sectional study with retrospective data.collection over 10 years (2012-2021). Results: We collected 91 cases of vulnating esophageal foreign bodies, i.e. 9.1 cases/year (4.7%). The mean age of the patients was 14 ± 19 years. The sex ratio was 1.6. The circumsta.ces of occurrence were dominated by accidenta. ingestion of vulnating esophageal foreign bodies (98.9%). The average time to consulta.ion was 7.5 hours. Dysphagia was the dominant symptom (64.8%). Cervico-thoracic radiography found dual contour radiopaque images in 71.4%. Esophagoscopy with rigid tube was performed in 97.8%. The average time for extraction of the vulnating esophageal foreign bodies was 8 hours. Vulnerating esophageal foreign bodies were non-organic in 84.6%. The button cell represented 64.8%. Their location was cervical in 61.5% intraoperatively. The lesion assessment found ulcerative lesions in 42.9% (p Conclusion: Vulnating esophageal foreign bodies are relatively frequent in our ENT practice. Although their diagnosis is often easy, their treatment is still difficult and requires multidisciplinary management. Thus, for us, prevention remains the first effective weapon.

关键词： Foreign Bodies Esophagus Vulnerable Management Sequelae

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基于LTCC的3D异质集成低通滤波器

微波学报 2024年第4期40卷 69-73页

作者：曾竞涛沈斌徐金旭沓世我章秀银华南理工大学电子与信息学院广州510641 广东风华高新科技股份有限公司肇庆526060 新型电子元器件关键材料与工艺国家重点实验室肇庆526060

在射频应用中,低温共烧陶瓷(LTCC)技术是关键技术路线之一,然而使用单一介质的LTCC技术的性能很局限。为此,文中对基于LTCC的3D异质集成技术进行研究,通过调节流延配方、烧结速度、烧结温度、保温时间等工艺参数,设计异质匹配共烧的烧... 详细信息

在射频应用中,低温共烧陶瓷(LTCC)技术是关键技术路线之一,然而使用单一介质的LTCC技术的性能很局限。为此,文中对基于LTCC的3D异质集成技术进行研究,通过调节流延配方、烧结速度、烧结温度、保温时间等工艺参数,设计异质匹配共烧的烧结行为控制、界面相容性和组织性能调控方案,开发出稳定可靠的LTCC集成工艺,给出基于LTCC异质集成的器件仿真设计、3D集成制备方法,并制作了一款共烧界面结合完好、性能优越的LTCC异质集成低通滤波器进行验证。验证结果表明,该异质集成技术的瓷粉性能指标和可加工特性满足使用要求,预期能够得到广泛应用。

关键词：低温共烧陶瓷 3D异质集成低通滤波器

公共草场自主治理实现机制——基于SES框架的案例分析

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草地学报 2024年第4期32卷 1021-1033页

作者：乌日汗李平张苏日塔拉图钱政成王强中国农业科学院草原研究所内蒙古呼和浩特010010

随着牧区社会-生态系统破碎化问题的凸显,公共草场自主治理引起了学术界关注。然而,中国现行草地承包制度下,自主治理制度的可行性及其实现机制仍有待系统研究。本文连续三年跟踪调查了内蒙古一片公共草场,应用SES框架解构了案例地复杂... 详细信息

随着牧区社会-生态系统破碎化问题的凸显,公共草场自主治理引起了学术界关注。然而,中国现行草地承包制度下,自主治理制度的可行性及其实现机制仍有待系统研究。本文连续三年跟踪调查了内蒙古一片公共草场,应用SES框架解构了案例地复杂系统,并依据案例地情形构建了关联博弈模型,解析了公共草场自主治理制度下牧户互动机制。结果表明:草地资源的可持续利用关乎牧户长期生产成本。为了节约长期生产成本,牧区社区制定了公共草场自主治理制度。制度实施过程中,依据牧草长势和牲畜膘情形成了动态的草畜平衡规则,可操作的惩罚制度和地方政府弹性干预促进了自主治理制度的良好运作。同时,牧户之间的放牧博弈和社会交往博弈相互关联,使得自主治理制度以较低成本自我实施。该制度的有效实施有助于提高草地资源使用的公平性,也有利于牧户之间、牧户与地方政府之间信任的增长,提高生产互惠性和生产效率。因此,应探索建立自主治理和承包制度并存的多样化草地资源管理体系。

关键词：自主治理 SES框架关联博弈草地资源管理

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潜在内分泌干扰风险防晒剂的监管及其使用情况分析

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日用化学工业（中英文） 2024年第3期54卷 337-343页

作者：塔娜冯孟鑫高家敏张凤兰王钢力中国食品药品检定研究院北京100062

欧盟对具有潜在内分泌干扰风险的化妆品原料进行筛查并建立了化妆品原料优先评估清单,该清单包含了4个欧盟化妆品指令准用防晒剂。文章以优先评估清单中的防晒剂为研究对象,对其在欧盟、美国等国家(地区)的监管情况和在我国的使用情况... 详细信息

欧盟对具有潜在内分泌干扰风险的化妆品原料进行筛查并建立了化妆品原料优先评估清单,该清单包含了4个欧盟化妆品指令准用防晒剂。文章以优先评估清单中的防晒剂为研究对象,对其在欧盟、美国等国家(地区)的监管情况和在我国的使用情况进行概述和分析,并汇总欧盟消费者安全科学委员会的再评估结果。经研究调查发现,优先评估清单中防晒剂在我国的法规限值与美国、日本和韩国规定基本一致,但部分防晒剂限值较欧盟新修订限值高,可能存在安全风险。建议监管部门综合评估上述防晒剂的安全风险、实际使用情况和行业发展等因素,通过进一步评估和细化法规限值,以期更好地保障民众用妆安全。

关键词：防晒剂内分泌干扰物监管

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基于光声谱分析的大鼠慢性前列腺炎评价

声学学报 2024年第3期49卷 424-430页

作者：王憧朱云开董琪李博艺封婷李颖陈亚青他得安复旦大学信息科学与工程学院生物医学工程系上海200438 上海交通大学医学院附属新华医院上海200092 复旦大学工程与应用技术研究院生物医学工程技术研究所上海200433

探究了使用光声谱参数评价慢性前列腺炎的可行性。通过对大鼠注射弗氏完全佐剂构建大鼠慢性前列腺炎症模型,使用光声显微仪器扫描前列腺组织切片获取原始光声信号。计算信号的功率谱参数(斜率、截距、平均谱功率和频谱质心偏移量),对获... 详细信息

探究了使用光声谱参数评价慢性前列腺炎的可行性。通过对大鼠注射弗氏完全佐剂构建大鼠慢性前列腺炎症模型,使用光声显微仪器扫描前列腺组织切片获取原始光声信号。计算信号的功率谱参数(斜率、截距、平均谱功率和频谱质心偏移量),对获得的谱参数进行了分析统计和参数成像,并讨论了不同频带的选择对评价结果的影响。实验结果表明,炎症组织与正常组织谱参数的统计结果和成像结果均存在显著性差异,使用频谱质心偏移量(SCS)成像可以区分炎症组织和正常组织,且在带宽固定的情况下,斜率参数和平均谱功率参数分别在高频谱段和低频谱段成像结果清晰,不同频带对截距参数成像的影响较小。

关键词：光声显微光声谱分析前列腺炎组织表征