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237 papers found.
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Less extrusion debris during the retreatment of curved canals using twisted files with higher rotational speeds: an ex vivo study

Tan 1 Yi Liu 1 0 School of Dentistry, Shandong University , 44, Wenhua West Road, Jinan 250012, Shandong Province , China 1 School of Stomatology, Qingdao University , Qingdao 266021, Shandong Province

The complete mitochondrial genomes of two freshwater snails provide new protein-coding gene rearrangement models and phylogenetic implications

Background Mitochondrial (mt) genome sequences are widely used for species identification and to study the phylogenetic relationships among Gastropoda. However, to date, limited data are available as taxon sampling is narrow. In this study we sequenced the complete mt genomes of the freshwater gastropods Radix swinhoei (Lymnaeidae) and Planorbarius corneus (Planorbidae). Based on ...

Incorporating High-Dimensional Exposure Modelling into Studies of Air Pollution and Health

Performing studies on the risks of environmental hazards on human health requires accurate estimates of exposures that might be experienced by the populations at risk. Often there will be missing data and in many epidemiological studies, the locations and times of exposure measurements and health data do not match. To a large extent this will be due to the health and exposure data ...

A new shear strength model incorporating influence of infill materials for rock joints

Overall mechanical behaviour of jointed rock masses is predominantly controlled by the shear strength of rock joints which contain infill materials. Barton’s empirical model has been shown to be one of the most successful model in predicting joint shear strength (Barton and Choubey in Rock Mech 10:1–54, 1977). However, the Barton model does not express the effect of infill material ...

A HuR/TGF-β1 feedback circuit regulates airway remodeling in airway smooth muscle cells

Background Asthma is a worldwide health burden with an alarming prevalence. For years, asthma-associated airway injury remains elusive. Transforming growth factor β1 (TGF-β1) is a pleiotropic cytokine that has been shown to be involved in the synthesis of the matrix molecules associated with airway remodeling. Human antigen R (HuR), the member of the Hu RNA-binding protein family, ...

Association between college health services and contraceptive use among female students at five colleges in Wuhan, China: a cross-sectional study

Background College students have a high incidence of unplanned pregnancies in China, which has highly raised public attention. As such, numerous reproductive health services are provided to college students. This study examined whether health services in college lead to contraceptive use among female college students in heterosexual relationships. Methods A self-administered ...

Pulse pressure variation shows a direct linear correlation with tidal volume in anesthetized healthy patients

, Grant Recipient: Yi Liu). Availability of data and materials Data will not be shared. The patent application do not allow the raw data to the public. Authors’ contributions All authors have made

A novel variant on chromosome 6p21.1 is associated with the risk of developing colorectal cancer: a two-stage case-control study in Han Chinese

Background Genes in inflammatory pathways play a pivotal role in the development of colorectal cancer. We conducted a two-stage case-control study and aimed at screening the colorectal cancer-associated genetic variations in inflammatory genes. Methods Twenty-three candidate variants were genotyped in 952 primary colorectal cancer cases and 875 cancer-free controls from eastern ...

Real-time HER2 status detected on circulating tumor cells predicts different outcomes of anti-HER2 therapy in histologically HER2-positive metastatic breast cancer patients

Background This study was initiated to investigate the difference in HER2 status between tumor tissue and circulating tumor cells (CTCs), as well as the predictive value of CTC HER2 status for predicting the outcomes of anti-HER2 therapy in histologically HER2-positive metastatic breast cancer (MBC) patients. Methods HER2 expression on CTCs was detected using a CellSearch system ...

Occipital pressure sores in two neonates

The preference for a specific head shape can be influenced by people’s culture, religious beliefs and race. Modern Chinese people prefer a “talented” head shape, which is rounded and has a long profile. To obtain their preferred head shape, some parents try to change their neonates’ sleeping position. Due to these forced sleeping positions, positional skull deformities, such as ...

Effects of a Cu x O Buffer Layer on a SiO x -Based Memory Device in a Vaporless Environment

Liu and Huang Nanoscale Research Letters Effects of a Cu O Buffer Layer on a SiO -Based x x Memory Device in a Vaporless Environment Chih-Yi Liu 0 Zheng-Yao Huang 0 0 Department of Electronic

Characterization of preferential flow paths between boreholes in fractured rock using a nanoscale zero-valent iron tracer test

Recent advances in borehole geophysical techniques have improved characterization of cross-hole fracture flow. The direct detection of preferential flow paths in fractured rock, however, remains to be resolved. In this study, a novel approach using nanoscale zero-valent iron (nZVI or ‘nano-iron’) as a tracer was developed for detecting fracture flow paths directly. Generally, only ...

Increased Water Storage in the Qaidam Basin, the North Tibet Plateau from GRACE Gravity Data

Groundwater plays a key role in maintaining the ecology and environment in the hyperarid Qaidam Basin (QB). Indirect evidence and data from sparse observation wells suggest that groundwater in the QB is increasing but there has been no regional assessment of the groundwater conditions in the entire basin because of its remoteness and the severity of the arid environment. Here we ...

The usage of biological DMARDs and clinical remission of rheumatoid arthritis in China: a real-world large scale study

The aims of this study are to characterize the biological disease-modifying antirheumatic drug (bDMARD) usage patterns in real-life and examine the remission rate of rheumatoid arthritis (RA) patients receiving bDMARDs in routine clinical practice in China. Consenting RA patients (≥18 years) from 15 teaching hospitals and receiving marketed bDMARDs were included. In total, 802 ...

A retargeting method for stereoscopic 3D video

We propose a disparity-constrained retargeting method for stereoscopic 3D video, which simultaneously resizes a binocular video to a new aspect ratio and remaps the depth to the perceptual comfort zone. First, we model distortion energies to prevent important video contents from deforming. Then, to maintain depth mapping stability, we model disparity variation energies to ...

Successful expression of the Bordetella petrii nitrile hydratase activator P14K and the unnecessary role of Ser115

Background The activator P14K is necessary for the activation of nitrile hydratase (NHase). However, it is hard to be expressed heterogeneously. Although an N-terminal strep tagged P14K could be successfully expressed from Pseudomonas putida, various strategies for the over-expression of P14K are needed to facilitate further application of NHase. Results P14K was successfully ...

Clinical Application of an Innovative Multiplex-Fluorescent-Labeled STRs Assay for Prader-Willi Syndrome and Angelman Syndrome

Prader-Willi syndrome (PWS) and Angelman syndrome (AS) are two clinically distinct neurodevelopmental disorders caused by absence of paternally or maternally expressed imprinted genes on chr15q11.2-q13.3. Three mechanisms are known to be involved in the pathogenesis: microdeletions, uniparental disomy (UPD) and imprinting defects. Both disorders are difficult to be definitely ...