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1,655 results on '"Xu Zhenzhen"'

1. Incorporation of poly(3-acrylamidopropyl trimethylammonium chloride-co-acrylic acid) branches for good sizing properties and easy desizing from sized cotton warps

Author

Zhang Chaohui, Li Wei, and Xu Zhenzhen

Subjects
cornstarch, graft polymerization, adhesion, film properties, desizability, Polymers and polymer manufacture, TP1080-1185
Abstract

This study aimed to ascertain the influence of poly(3-acrylamidopropyl trimethylammonium chloride-co-acrylic acid) [P(ATC-co-AA)] on the adhesion, film properties, desizability of cornstarch, and reveal a suitable mole percentage of ATC units on the P(ATC-co-AA) for acquiring a new starch-based size [S-g-P(ATC-co-AA)]. A series of S-g-P(ATC-co-AA) samples were synthesized by the graft polymerization of acid-converted cornstarch with ATC and AA monomers. Their adhesion, film properties, and desizability were assessed. The results displayed that the P(ATC-co-AA) branches could significantly improve the adhesion to cotton fibers and diminish the film brittleness of starch. Under similar grafting ratio, the adhesion and desizability of S-g-P(ATC-co-AA) depended on the mole percentage of ATC units. Increasing the percentage favored the adhesion but disfavored the desizability. The percentage displayed a low effect on the film properties. S-g-P(ATC-co-AA) with a mole percentage of 57.7% presented good sizing properties and easy desizing, which had potential application in cotton warp sizing.

Published
2023
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5. 3D Fusion Framework for Infarction and Angiogenesis Analysis in a Myocardial Infarct Minipig Model

Author

Xu Zhenzhen PhD, Bo Tao PhD, MD, Yu Li MSc, Jun Zhang PhD, Xiaochao Qu PhD, Feng Cao PhD, and Jimin Liang PhD

Subjects
Biology (General), QH301-705.5, Medical technology, R855-855.5
Abstract

The combination of different modality images can provide detailed and comprehensive information for the prognostic assessment and therapeutic strategy of patients with ischemic heart disease. In this study, a 3D fusion framework is designed to integrate coronary computed tomography (CT) angiography (CTA), 2-deoxy-2-[ 18 F]fluoro-D-glucose ([ 18 F]DG) positron emission tomography (PET)/CT, and [ 68 Ga]-1,4,7-triazacyclononane-1,4,7-triacetic acid-(Arg-Gly-Asp)2 ([ 68 Ga]-NOTA-PRGD2) PET/CT images of the myocardial infarction model in minipigs. First, the structural anatomy of the heart in coronary CTA and CT is segmented using a multi-atlas-based method. Then, the hearts are registered using the B-spline-based free form deformation. Finally, the [ 18 F]DG and [ 68 Ga]-NOTA-PRGD2 signals are mapped into the heart in coronary CTA, which produces a single fusion image to delineate both the cardiac structural anatomy and the functional information of myocardial viability and angiogenesis. Heart segmentation demonstrates high accuracy with good agreement between manual delineation and automatic segmentation. The fusion result intuitively reflects the extent of the [ 18 F]DG uptake defect as well as the location where the [ 68 Ga]-NOTA-PRGD2 signal appears. The fusion result verified the occurrence of angiogenesis based on the in vivo noninvasive molecular imaging approach. The presented framework is helpful in facilitating the study of the relationship between infarct territories and blocked coronary arteries as well as angiogenesis.

Published
2017
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6. The Needs and Experiences of Patients Returning to Work After Total Knee Arthroplasty and Total Hip Arthroplasty: A Systematic Review and Meta-Synthesis

Author

Zhang, Wenzhong, Ji, Hong, Wang, Ning, Sun, Kangming, Xu, Zhenzhen, Li, Jing, Liu, Cuihong, Sun, Qingxiang, Wang, Chunlei, and Zhao, Fengyi

Subjects
Psychological research, Patients -- Beliefs, opinions and attitudes -- Psychological aspects -- Physiological aspects, Work -- Social aspects -- Psychological aspects -- Health aspects
Abstract

Objective. The objective of this study was to conduct a systematic and comprehensive review of qualitative research to examine the physical and psychological needs, as well as work experiences, of patients undergoing total knee replacement and total hip replacement surgeries during their process of returning to work. Methods. A systematic review and meta-synthesis of qualitative literature was conducted. A systematic search was conducted across 8 databases to identify qualitative or mixed-methods research on the needs and experiences of individuals with total knee replacement and total hip replacement who have returned to work. The search period extended from the inception of each database to March 2023. Two researchers independently utilized a predetermined search strategy to retrieve relevant English-language studies published in any year. The included studies were assessed for quality using the Critical Appraisal Skills Program appraisal tool. Findings from the studies were then summarized and integrated using the pooled integration method. Results. There were 10 studies in total. Three key themes were identified from the original research: needs during the return to work process and rehabilitation training, faith and support to return to work, and constraints and challenges at work. Conclusion. Health care professionals and employers should conscientiously consider the physical and psychological requirements of patients who have undergone total knee replacement and total hip replacement when they are resuming work, taking into account the specific constraints and challenges that may arise in the workplace. To ensure a seamless transition back to work, it is essential to develop tailored occupational interventions, implement comprehensive return to work programs, and offer patients sufficient understanding and support. Impact. The findings of this study offer valuable insights into the physical and psychological needs, as well as the work experiences, of patients who have undergone total knee replacement and total hip replacement during their reintegration into the workforce. These findings have the potential to assist health care professionals and employers in providing enhanced support to facilitate successful return-to-work outcomes for patients. Keywords: Meta-Synthesis, Qualitative Research, Return to Work, Systematic Review, Total Hip Arthroplasty, Total Knee Arthroplasty, Introduction Arthroplasty is a crucial intervention for curing severe joint diseases and injuries by restoring joint function and reducing pain, significantly enhancing patients' physical health and quality of life. (1,2) [...]

Published
2024
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7. A Content-Based Generator Method for Vessel Detection

Author

Yang, Yang, Xu, Zhenzhen, Liu, Xingyu, Pan, Jun, Liu, Likun, Filipe, Joaquim, Editorial Board Member, Ghosh, Ashish, Editorial Board Member, Prates, Raquel Oliveira, Editorial Board Member, Zhou, Lizhu, Editorial Board Member, and Yu, Quan, editor

Published
2024
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