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Retracted: Application of CT Ultrasonography Combined with Microscopic Intraperitoneal Hyperthermic Perfusion Chemotherapy in Postoperative Treatment of Oocyst Carcinoma. 撤下:CT超声结合显微腹腔热灌注化疗在卵囊癌术后治疗中的应用。
4区 工程技术 Q3 Physics and Astronomy Pub Date : 2023-01-01 DOI: 10.1155/2023/9808639
Scanning

[This retracts the article DOI: 10.1155/2022/5444552.].

[本文撤回文章DOI: 10.1155/2022/5444552.]。
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引用次数: 0
Detection of Apical Dental Resorption Caused by Endodontic Infection in Mice Using Fluorescence and Bright-Field Microscopy. 荧光和明场显微镜检测小鼠根管感染引起的根尖牙吸收。
4区 工程技术 Q3 Physics and Astronomy Pub Date : 2023-01-01 DOI: 10.1155/2023/4619503
Marcio Santos de Carvalho, Luciano Aparecido de Almeida-Junior, Yuri Jivago Silva Ribeiro, Maya Fernanda Manfrin Arnez, Raquel Assed Bezerra da Silva, Fabrício Kitazono de Carvalho, Francisco Wanderley Garcia Paula-Silva

The aim of this study was to evaluate the sensitivity, specificity, and predictive values of the fluorescence microscopy method in the detection of apical dental reabsorption after induction of apical periodontitis in animal models. Forty-first molars of mice, aged 6 to 8 weeks, had their root canals exposed to the oral environment or were maintained healthy as controls (n = 20). After 14 and 42 days, mice were euthanized and tissues were collected for histological evaluation by means of bright field and fluorescence microscopy. The accuracy of fluorescence microscopy in identifying apical external dental resorption was investigated using a diagnostic validation test based on the sensitivity (S) and specificity (E) properties. Bright-field microscopy revealed a higher number of specimens with scores of 1 to 3 - absence of apical dental resorption (n = 29; 52%), while fluorescence microscopy revealed a higher number of specimens with scores of 4 to 6 - presence of apical dental resorption (n = 37; 66%). Out of 56 specimens, 26 were TP, 11 were FP, and 19 were TN. No FN result was observed. Fluorescence microscopy presented a sensitivity value of 1, similar to the bright-field method, while specificity was lower (0.633). The accuracy of the fluorescent method to detect apical dental resorption was 0.804. Fluorescence microscopy revealed a higher number of false positive apical dental resorption than bright-field microscopy. The detection of apical dental resorption was not impacted by the sensitivity of the method but by its specificity.

本研究的目的是评价荧光显微镜方法在动物模型根尖牙周炎诱导后检测根尖牙重吸收的敏感性、特异性和预测价值。6 ~ 8周龄小鼠的41磨牙将根管暴露于口腔环境或保持健康作为对照组(n = 20)。分别于第14天和第42天对小鼠实施安乐死,取组织进行明光显微镜和荧光显微镜组织学观察。采用基于敏感性(S)和特异性(E)特性的诊断验证试验,研究荧光显微镜鉴别根尖外牙吸收的准确性。明光显微镜显示1到3分的标本数量较多-根尖牙吸收缺失(n = 29;52%),而荧光显微镜显示更多的标本得分为4至6分-存在根尖牙吸收(n = 37;66%)。56例标本中TP 26例,FP 11例,TN 19例,未见FN结果。荧光显微镜的灵敏度为1,与明场法相近,特异度较低(0.633)。荧光法检测根尖牙吸收的准确度为0.804。荧光显微镜显示假阳性的根尖牙吸收比明场显微镜更多。根尖牙吸收的检测不受方法敏感性的影响,而受其特异性的影响。
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引用次数: 0
Retracted: Prediction of Renal Function Damage in Patients with Essential Hypertension Based on Stepwise Regression Equation Scanning by AASI. 撤下:基于AASI逐步回归方程扫描预测原发性高血压患者肾功能损害。
4区 工程技术 Q3 Physics and Astronomy Pub Date : 2023-01-01 DOI: 10.1155/2023/9831918
Scanning

[This retracts the article DOI: 10.1155/2022/4728921.].

[本文撤回文章DOI: 10.1155/2022/4728921.]。
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引用次数: 0
Microstructure and Mechanical Properties of Gradient Nanostructured Q345 Steel Prepared by Ultrasonic Severe Surface Rolling. 超声剧烈表面轧制梯度纳米结构Q345钢的组织与力学性能
4区 工程技术 Q3 Physics and Astronomy Pub Date : 2023-01-01 DOI: 10.1155/2023/7705844
Chao Ge, Weilong Meng, Handui Feng, Muchun Cui, Lei Dong, Tianfeng Miao, Yantong Huo, Jiemin Wu, Jing Han

In this work, ultrasonic severe surface rolling (USSR), a new surface nanocrystallization technique, is used to prepare gradient nanostructure (GNS) on the commercial Q345 structural steel. The microstructure of the GNS surface layer is characterized by employing EBSD and TEM, and the result indicates that a nanoscale substructure is formed at the topmost surface layer. The substructures are composed of subgrains and dislocation cells and have an average size of 309.4 nm. The GNS surface layer after USSR processing for one pass has a thickness of approximately 300 μm. The uniaxial tensile measurement indicates that the yield strength of the USSR sample improves by 25.1% compared to the as-received sample with slightly decreased ductility. The nanoscale substructure, refined grains, high density of dislocations, and hetero-deformation-induced strengthening are identified as responsible for the enhanced strength. This study provides a feasible approach to improving the mechanical properties of structural steel for wide applications.

采用超声剧烈表面轧制(USSR)这一新的表面纳米化技术,在Q345钢上制备了梯度纳米结构(GNS)。利用EBSD和TEM对GNS表层的微观结构进行了表征,结果表明,GNS表层最上层形成了纳米级的亚结构。亚结构由亚晶粒和位错胞组成,平均尺寸为309.4 nm。经过一次前苏联处理后的GNS表层厚度约为300 μm。单轴拉伸测试结果表明,苏联试样的屈服强度比接收试样提高了25.1%,但延性略有下降。纳米级的亚结构、精细的晶粒、高密度的位错和异质变形诱导强化被认为是提高强度的原因。本研究为提高结构钢的力学性能提供了一条可行的途径,具有广泛的应用前景。
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引用次数: 0
Morphological Characteristics of Young and Old Murine Hematopoietic Stem Cell Niches, as Modeled In Vitro. 体外建立幼龄和老年小鼠造血干细胞壁龛的形态学特征。
4区 工程技术 Q3 Physics and Astronomy Pub Date : 2023-01-01 DOI: 10.1155/2023/5541050
Mojca Justin, Ema Rogač Randl, Veno Kononenko, Matej Hočevar, Damjana Drobne, Primož Rožman

The hematopoietic stem cell (HSC) niche undergoes detrimental changes with age. The molecular differences between young and old niches are well studied and understood; however, young and old niches have not yet been extensively characterized in terms of morphology. In the present work, a 2D stromal model of young and old HSC niches isolated from bone marrow was investigated using light and scanning electron microscopy (SEM) to characterize cell density after one, two, or three weeks of culturing, cell shape, and cell surface morphological features. Our work is aimed at identifying morphological differences between young and old niche cells that could be used to discriminate between their respective murine HSC niches. The results show several age-specific morphological characteristics. The old niches differ from the young ones in terms of lower cell proliferating capacity, increased cell size with a flattened appearance, increased number of adipocytes, and the presence of tunneling nanotubes. In addition, proliferating cell clusters are present in the young niches but not in the old niches. Together, these characteristics could be used as a relatively simple and reliable tool to discriminate between young and old murine HSC niches and as a complementary approach to imaging with specific cellular markers.

造血干细胞(HSC)生态位随着年龄的增长而发生有害的变化。年轻和年老的生态位之间的分子差异已经得到了很好的研究和理解;然而,年轻和年老的生态位尚未在形态学方面得到广泛的表征。在本研究中,利用光镜和扫描电镜(SEM)研究了从骨髓中分离的年轻和年老HSC小生境的二维基质模型,以表征培养1、2或3周后的细胞密度、细胞形状和细胞表面形态学特征。我们的工作旨在确定年轻和年老的生态位细胞之间的形态学差异,这些差异可用于区分它们各自的小鼠HSC生态位。结果显示了几个年龄特异性形态学特征。年老的壁龛与年轻的不同之处在于细胞增殖能力较低,细胞大小增加,外观扁平,脂肪细胞数量增加,以及隧道纳米管的存在。此外,增殖细胞团存在于年轻的生态位,而不存在于年老的生态位。总之,这些特征可以作为一种相对简单和可靠的工具来区分年轻和年老的小鼠HSC利基,并作为一种补充方法来使用特定的细胞标记进行成像。
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引用次数: 0
A Geometric Morphometrics Approach for Sex Estimation Based on the Orbital Region of Human Skulls from Bosnian Population. 一种基于波黑人群颅骨轨道区域的性别估计几何形态计量学方法。
4区 工程技术 Q3 Physics and Astronomy Pub Date : 2023-01-01 DOI: 10.1155/2023/2223138
Zurifa Ajanović, Uzeir Ajanović, Lejla Dervišević, Haris Hot, Alma Voljevica, Elvira Talović, Emina Dervišević, Selma Hašimbegović, Aida Sarač-Hadžihalilović

Background: Understanding the anatomy and morphological variability of the orbital region is of great importance in clinical practice, forensic medicine, and biological anthropology. Several methods are used to estimate sex based on the skeleton or parts of the skeleton: classic methods and the geometric morphometric method. The objective of this research was to analyse sex estimation of the orbital region on a sample of skulls from a Bosnian population using the geometric morphometric method.

Materials and methods: The research was conducted on three-dimensional models of 211 human adult skulls (139 males and 72 females) from the Osteological Collection at the Faculty of Medicine in Sarajevo. The skulls were recorded using a laser scanner to obtain skull 3D models. We marked 12 landmarks on each model to analyse sexual dimorphism. Landmarks were marked using the program Landmark Editor. After marking the landmarks, we used the MorphoJ program to analyse the morphological variability between male and female orbital regions.

Results: After Procrustes superimposition, generating a covariant matrix, and introducing sex as a variable for classification, a discriminant functional analysis (DFA) was applied which determined the estimation for males with 86.33% accuracy and for females with 88.89% based on the form of the orbital region. The results of regression analysis showed that the size of the orbital region has a statistically significant effect on its shape's sexual dimorphism. After excluding the influence of size and providing DFA, we concluded that sex estimation was possible with 82.01% accuracy for males and 80.55% accuracy for females based on the shape of the orbital region in the examined sample.

Conclusion: Sex estimation based on the orbital region was possible with more than 80% accuracy for both sexes, which is a high percentage of correct estimation. Therefore, we recommend using the orbital region of the skull for sex estimation.

背景:了解眶区的解剖学和形态学变异在临床实践、法医学和生物人类学中具有重要意义。基于骨骼或骨骼部分来估计性别的方法有几种:经典方法和几何形态测量法。本研究的目的是利用几何形态计量学方法对波斯尼亚人口头骨样本的眼眶区域进行性别估计分析。材料和方法:研究对象是萨拉热窝医学院骨学馆藏的211个成人头骨(139个男性,72个女性)的三维模型。使用激光扫描仪记录颅骨以获得颅骨3D模型。我们在每个模型上标记了12个里程碑来分析性别二态性。地标被标记使用程序地标编辑器。在标记好地标后,我们使用MorphoJ程序分析了男性和女性眼眶区域的形态差异。结果:在Procrustes叠加、生成协变矩阵、引入性别作为分类变量后,应用判别功能分析(DFA)确定了基于眶区形态对男性和女性的估计准确率分别为86.33%和88.89%。回归分析结果表明,眼眶区域的大小对其形状的性别二态性有统计学意义的影响。在排除大小的影响并提供DFA后,我们得出结论,根据检查样本中眼眶区域的形状,男性的性别估计准确率为82.01%,女性的性别估计准确率为80.55%。结论:基于眼窝区域进行性别估计,男女均可达到80%以上的准确率,估计正确率较高。因此,我们建议使用颅骨眶区进行性别估计。
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引用次数: 3
Retracted: Injury Prevention Effect of MRI Imaging Technology in Physical Education and Sports Training. 撤下:MRI成像技术在体育运动训练中的损伤预防作用。
4区 工程技术 Q3 Physics and Astronomy Pub Date : 2023-01-01 DOI: 10.1155/2023/9852968
Scanning

[This retracts the article DOI: 10.1155/2022/9991523.].

[本文撤回文章DOI: 10.1155/2022/9991523.]。
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引用次数: 0
Characterization of Retained Austenite in Advanced High-Strength Steel. 高级高强度钢中残余奥氏体的表征。
4区 工程技术 Q3 Physics and Astronomy Pub Date : 2023-01-01 DOI: 10.1155/2023/9565903
Shouhua Li, Kejian Li, Longzhu Zhang, Yi Feng, Ziquan Liu, Pengjun Cao, Bo Liu, Jiling Dong

The retained austenite (RA) in advanced high-strength steels directly affects their plasticity. It is very important for the accurate characterization of their content and types. This paper prepared three specimens with three different Mn contents (1.0%, 1.4%, and 1.7%) that are used to obtain high-strength steel by ultrafast cooling heat treatment. The volume content and distribution of the RA were analysed by an X-ray Debye ring measurement system, electron backscatter diffraction (EBSD), and transmission electron microscopy (TEM). In addition, the mechanical tensile test provided the tensile properties and elongation of three specimens. It was finally concluded that when the content of Mn increased, the island-type and thin film-type RA both increased, which may effectively improve the plasticity of the martensitic steels.

高级高强钢中残余奥氏体的存在直接影响高强钢的塑性。准确地描述它们的内容和类型是非常重要的。本文制备了三种不同Mn含量(1.0%、1.4%、1.7%)的试样,通过超快冷却热处理获得高强度钢。采用x射线德拜环测量系统、电子背散射衍射(EBSD)和透射电镜(TEM)对RA的体积含量和分布进行了分析。此外,力学拉伸试验提供了三个试样的拉伸性能和伸长率。结果表明,随着Mn含量的增加,岛状RA和薄膜状RA均增加,可有效提高马氏体钢的塑性。
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引用次数: 0
Retracted: High-Intensity Injury Recognition Pattern of Sports Athletes Based on the Deep Neural Network. 基于深度神经网络的运动运动员高强度损伤识别模式
4区 工程技术 Q3 Physics and Astronomy Pub Date : 2023-01-01 DOI: 10.1155/2023/9821689
Scanning

[This retracts the article DOI: 10.1155/2022/2794225.].

[本文撤回文章DOI: 10.1155/2022/2794225.]。
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引用次数: 0
Retracted: Unsupervised Hyperspectral Microscopic Image Segmentation Using Deep Embedded Clustering Algorithm. 撤下:基于深度嵌入聚类算法的无监督高光谱显微图像分割。
4区 工程技术 Q3 Physics and Astronomy Pub Date : 2023-01-01 DOI: 10.1155/2023/9890786
Scanning

[This retracts the article DOI: 10.1155/2022/1200860.].

[此撤回文章DOI: 10.1155/2022/1200860.]。
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引用次数: 0
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Scanning
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