Results 21 to 30 of about 3,697 (157)

Taxonomic revision of lizards from the Paleocene deposits of the Qianshan Basin, Anhui, China [PDF]

open access: yes, 2016
Although the Late Cretaceous lizard fauna of China and Mongolia is relatively well-known, information on Paleocene lizards from the same region is currently limited.
Dong, LP, Evans, SE, Wang, Y
core  

Precise identification and threshold inversion of pores and fissures in CT digital coal rock based on Bi-PTI model [PDF]

open access: yes, 2023
In the research area of the CT digital coal petrography, the selection of gray threshold directly affects the accuracy of spatial structure remodeling. To allow the pores and fissures space remodeling data to more accurately represent the real structure ...
Bo ZHAO   +5 more
core   +1 more source

Yttrium Addition Co‐Enhances the Plasticity and Corrosion Resistance of TiB2‐Refined Al‐Mg‐Zn Alloys

open access: yesRare Metals, Volume 45, Issue 1, January 2026.
ABSTRACT To address the degradation of corrosion resistance induced by Al‐5Ti‐B grain refiner during the strengthening of Al‐Mg‐Zn alloys, this study innovatively employed a rare earth element yttrium (Y) alloying strategy to achieve synergistic enhancement of mechanical strength and corrosion resistance.
Wen‐Tao Qin   +9 more
wiley   +1 more source

Diagnostic Value of Transbronchial Needle Aspiration and Endobronchial Ultrasoundguided Transbronchial Needle Aspiration for Hilar and Mediastinal Lymph Nodes in Lung Cancer Patients [PDF]

open access: yes, 2010
Background and objective Transbronchial needle aspiration (TBNA) and endobronchial ultrasoundguided TBNA (EBUS-TBNA) have been applied to the diagnosis for mediastinal lymph nodes.
Hongli YI   +4 more
core  

Whole‐body non‐forensic fetal virtopsy using postmortem magnetic resonance imaging at 7 Tesla vs classical autopsy

open access: yesUltrasound in Obstetrics &Gynecology, Volume 64, Issue 5, Page 661-668, November 2024.
ABSTRACT Objective To determine the diagnostic accuracy of virtual autopsy using whole‐body postmortem ultra‐high field magnetic resonance imaging (MRI) at 7 Tesla (T), using a short T2‐weighted imaging (T2‐WI) protocol, compared with classical autopsy, for detecting structural abnormalities in small second‐trimester fetuses. Methods Thirty consecutive
A. Staicu   +11 more
wiley   +1 more source

Influence Mechanism of Ionic Interface Reaction on Soil Porosity [PDF]

open access: yes, 2023
[Objective] The changes in surface charge properties of soil particles and the net force between particles were analyzed, in order to elucidate the influence mechanism of particle interaction on pore conditions.
Ding Wuquan   +3 more
core   +1 more source

A N–CoSe/CoSe2–C@Cu hierarchical architecture as a current collector‐integrated anode for potassium‐ion batteries

open access: yesRare Metals, Volume 43, Issue 8, Page 3702-3712, August 2024.
Graphical abstract AbstractThe highly reversible insertion/extraction of large‐radius K+ into electrode materials remains a tough goal, especially for conversion‐type materials. Herein, we design a current collector‐integrated electrode (N–CoSe/CoSe2–C@Cu) as an advanced anode for potassium‐ion battery (PIBs).
Zi‐Jie Mu   +9 more
wiley   +1 more source

低剂量CT窦道造影技术在臀部窦道中的诊断价值

open access: yesZhongguo shiyan zhenduanxue, 2018
目的通过对低剂量CT窦道造影扫描与常规CT扫描的辐射剂量、图像质量及病灶的显示情况的对比研究,探讨低剂量CT窦道造影扫描在臀部窦道中的应用价值。方法搜集2012年3月至2017年10月在本院诊断为臀部窦道的患者78例,随机分为A、B两组,窦道造影前后均行CT扫描,造影前均采用常规剂量(120kV,200mA)扫描,造影后两组分别采用100mA和50mA的低剂量扫描,其他参数保持一致。通过统计学方法比较低剂量造影扫描和常规扫描的辐射剂量、图像质量及病灶的显示情况等。结果 ...
方进智   +4 more
doaj  

The role of EGFR/ERK signaling for the self-renewal of germinative cells of Echinococcus multilocularis and its molecular mechanism [PDF]

open access: yes, 2016
多房棘球绦虫(Echinococcusmultilocularis,Em)中绦期幼虫(泡球蚴)在人体内以类似肿瘤的方式进行不断的增殖发育,引发严重的人兽共患泡球蚴病(Alveolarechinococcosis,AE)。泡球蚴不断增殖发育的基础是其生发细胞的自我更新和分化能力,这一特性类似于干细胞。表皮生长因子受体(EGFR)介导的EGFR/ERK信号通路是调控各种干细胞自我更新的主要通路之一,在进化上具有高度的保守性。 本文利用RealtimePCR、WesternBlot、免疫组化荧光和EdU ...
戴梦雅
core  

CT扫描联合酶联免疫吸附法检测血清AFP-L3含量在PHC诊断中的价值

open access: yesZhongguo shiyan zhenduanxue, 2013
目的通过CT扫描联合酶联免疫吸附法(ELISA)检测血清甲胎蛋白异质体(AFP-L3)含量,探讨其在原发性肝癌(PHC)诊断中的价值。方法137例(其中106例具CT增强扫描的资料)血清标本来自唐山市人民医院2011年3月至11月间的住院患者,运用ELISA法检测血清中AFP-L3的含量,以AFP-L3>37.89ng/ml为临界值。137例病例均具有CT或CT增强扫描资料,回顾分析137例患者总共164个PHC病灶的增强扫描经后处理技术得到二维及三维重建图像而诊断,探讨采用血清AFP ...
李玉柱   +7 more
doaj  

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