Search results for: Junfang Chen

Items from 1 to 17 out of 17 results

article

Efficacy and safety of current treatment interventions for patients with severe COVID‐19 infection: A network meta‐analysis of randomized controlled trials

Qinglin Cheng, Gang Zhao, Junfang Chen, Qingjun Jia, more

Journal of Medical Virology > 94 > 4 > 1617 - 1626

This study aimed to assess the efficacy and safety of different medications available at present for severe coronavirus disease 2019 (COVID‐19) infection. We searched databases for randomized controlled trials (RCTs) published up to April 30, 2021, with Chinese or English language restriction, of medications recommended for patients (aged 18 years or older) with severe COVID‐19 infection. We extracted...

article

The study of influence of working pressure on mode conversion of argon radio-frequency inductively coupled plasma

Youpeng Zhang, Junfang Chen, Congzheng Song, Yan Wang, more

Vacuum > 2016 > 132 > C > 16-21

Electron temperature and plasma density was measured with change of working air pressure by Langmuir probe at a given power. Radio-frequency (rf) inductively coupled plasma (ICP) discharge mode conversion is determined by optical emission spectrum (OES) with the increase of gas pressure at different power. The results indicate that plasma discharge mode can change from E mode to H mode and spectral...

article

Utilization of nanoparticles in microfluidic systems for optical detection

Wenbin Liang, Hangyu Lin, Junfang Chen, Chuanpin Chen

Microsystem Technologies > 2016 > 22 > 10 > 2363-2370

An increasing interest has been shown in microfluidic systems due to their properties including low consumption of reagents, short analysis time and easy integration. However, despite of these advantages over conventional methods, some limitations in sensitivity and selectivity still exist in microfluidic systems. Recently advancements in nanotechnology offer some new approaches for the detection...

article

A novel technology: microfluidic devices for microbubble ultrasound contrast agent generation

Hangyu Lin, Junfang Chen, Chuanpin Chen

Medical & Biological Engineering & Computing > 2016 > 54 > 9 > 1317-1330

Microbubbles are used as ultrasound contrast agents, which enhance ultrasound imaging techniques. In addition, microbubbles currently show promise in disease therapeutics. Microfluidic devices have increased the ability to produce microbubbles with precise size, and high monodispersity compared to microbubbles created using traditional methods. This paper will review several variations in microfluidic...

article

Synthesis of BiOI/Bi@CNFs heteroarchitecture and its visible light photocatalytic properties

Yuan Chen, Bitao Liu, Junfang Chen, Dongling Chen, more

Materials Letters > 2015 > 161 > C > 289-293

BiOI/Bi@CNFs heteroarchitecture was synthesized via an electrospinning and solvothermal method. The structure, morphology, visible light photocatalytic properties as well as the degradation mechanism of BiOI/Bi@CNFs were investigated. It can degrade 58% methyl orange in 120min, which is 20% more than that of BiOI/CNFs. The results indicate that such unique structure could enhance the charge transfer...

article

Facile synthesis of Bi nanoparticle modified TiO2 with enhanced visible light photocatalytic activity

Yuan Chen, Dongling Chen, Junfang Chen, Qiuju Lu, more

Journal of Alloys and Compounds > 2015 > 651 > C > 114-120

Uniform Bi nanoparticle modified TiO₂ porous nanofibers were prepared via the processes of emulsion electrospinning and the subsequent calcination. The morphology, crystal structure, optical and photocurrent responses, as well as the photocatalytic performance of the obtained photocatalysts were characterized and investigated in detail. The results suggest that the modified TiO₂ porous nanofibers...

article

In Vivo T Cell Depletion with Myeloablative Regimens on Outcomes after Cord Blood Transplantation for Acute Lymphoblastic Leukemia in Children

Doris M. Ponce, Mary Eapen, Rodney Sparapani, Tracey A. O'Brien, more

Biology of Blood and Marrow Transplantation > 2015 > 21 > 12 > 2173-2179

The inclusion of antithymocyte globulin (ATG) in cord blood transplantation is controversial. We evaluated outcomes according to ATG inclusion in 297 children and adolescents with acute lymphoblastic leukemia (ALL) who received myeloablative total body irradiation–based conditioning and either single-unit (74%) or double-unit (26%) grafts. Ninety-two patients (31%) received ATG and 205 (69%) did not...

article

Facile synthesis of Bi/BiOCl composite with selective photocatalytic properties

Dongling Chen, Min Zhang, Qiuju Lu, Junfang Chen, more

Journal of Alloys and Compounds > 2015 > 646 > C > 647-654

This paper presents a novel and facile method to fabricate Bi/BiOCl composites with dominant (001) facets in situ via a microwave reduction route. Different characterization techniques, including X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), transmission scanning electron microscopy (TEM), UV–vis diffuse reflectance spectrometry (DRS), X-ray photoelectron spectroscopy...

article

Spatial distribution study of argon radio-frequency inductively coupled plasma in inverse hysteresis transition area

Lifen Zhou, Junfang Chen, Junhui Ma, Ye Li

Vacuum > 2015 > 119 > Complete > 209-213

Parameters of radio-frequency (rf) inductively coupled plasma (ICP) have been investigated with Langmuir probe and optical emission spectrum (OES) in this paper. Through the observation results of OES, we can finally get that inverse hysteresis phenomenon would occur when the air pressure is 0.6 Pa. The mode of plasma is demonstrated based on OES while spatial distribution of electron temperature...

article

Properties of Cu₂ZnSnS₄ (CZTS) thin films prepared by plasma assisted co-evaporation

Ye Li, Junfang Chen, Junhui Ma

Journal of Materials Science: Materials in Electronics > 2015 > 26 > 9 > 6546-6551

In this work, Cu₂ZnSnS₄ (CZTS) in thin film form has been prepared on soda-lime glass by sulfurization of Cu–Zn–Sn (CZT) metal precursors. Different from traditional methods, precursor films were synthesized using elemental Cu, Zn and Sn metal wire by inductively coupled plasma (ICP) assisted co-evaporation. The composition, microstructure and properties of CZTS thin films were investigated using...

article

Structure design and photocatalytic properties of one-dimensional SnO ₂ -TiO ₂ composites

Yuan Chen, Bitao Liu, Junfang Chen, Liangliang Tian, more

Nanoscale Research Letters > 2015 > 10 > 1 > 1-6

One-dimensional SnO ₂ -TiO ₂ composites were prepared via emulsion electrospinning process. The obtained samples were characterized by a series of devices. The results showed that the porous core-shell SnO ₂ -TiO ₂ photocatalyst exhibited enhanced photocatalytic activity on the degradation of methyl orange (MO). It should be ascribed to the novel...

article

Effects of Al concentrations on the microstructure and mechanical properties of Ti–Al–N films deposited by RF-ICPIS enhanced magnetron sputtering

Dongke Li, JunFang Chen, Changwei Zou, Junhui Ma, more

Journal of Alloys and Compounds > 2014 > 609 > Complete > 239-243

Ti–Al–N films were deposited on Si (100) and mirror-polished stainless steel at 300°C by RF-ICPIS enhanced magnetron sputtering technique. Focusing on the effects of Al concentrations on the microstructure and mechanical properties of Ti–Al–N films, the structure and the growth morphology were characterized by X-ray diffraction (XRD) and field emission scanning electron microscope (FESEM). Ti–Al–N...

article

Low CD34 Dose Is Associated with Poor Survival after Reduced-Intensity Conditioning Allogeneic Transplantation for Acute Myeloid Leukemia and Myelodysplastic Syndrome

Johan Törlén, Olle Ringdén, Jennifer Le Rademacher, Minoo Batiwalla, more

Biology of Blood and Marrow Transplantation > 2014 > 20 > 9 > 1418-1425

Reduced-intensity conditioning/nonmyeloablative conditioning regimens are increasingly used in allogeneic hematopoietic cell transplantation (HCT). Reports have shown CD34 ⁺ dose to be important for transplantation outcome using myeloablative conditioning. The role of CD34 ⁺ dose of peripheral blood progenitor cells (PBPC) has not been previously analyzed in a large population undergoing...

article

College students’ consumption, contribution, and risk awareness related to online mapping services and social media outlets: does geography and GIS knowledge matter?

Adam J. Mathews, Yongmei Lu, Matthew T. Patton, Nathaniel Dede-Bamfo, more

GeoJournal > 2013 > 78 > 4 > 627-639

Location-enabled online tools and/or services (i.e. Google Earth/Maps, Flickr, Facebook check-ins, etc.) have been widely used for distributing and processing geospatial-related data. They attract diverse users to consume and contribute geographic information (GI) in many different forms. This study examines college students’ consumption and contribution of GI through these tools and/or services as...

article

A Testing Approach for MOS Circuit Using Single-Photon Detectors Under High Magnetic Fields

Zhongliang Pan, Ling Chen, Junfang Chen, Guangzhao Zhang, more

Journal of Low Temperature Physics > 2013 > 170 > 5-6 > 403-408

The MOS circuits must be tested thoroughly for insuring the reliability. A new testing approach for MOS circuits is presented in this paper, which makes use of single-photon detectors and high magnetic fields. If there are faults in the circuit under test, the photon emission from the circuit components is detected by a single-photon detector, the faults are located by the amount of the emitted photons...

article

Characterizations of GaN film growth by ECR plasma chemical vapor deposition

Silie Fu, Junfang Chen, Hongbin Zhang, Chaofen Guo, more

Journal of Crystal Growth > 2009 > 311 > 12 > 3325-3331

The electron cyclotron resonance plasma-enhanced metalorganic chemical vapor deposition technology (ECR–MOPECVD) is adopted to grow GaN films on (0001) α-Al ₂ O ₃ substrate. The gas sources are pure N ₂ and trimethylgallium (TMG). Optical emission spectroscopy (OES) and thermodynamic analysis of GaN growth are applied to understand the GaN growth process. The OES of ECR plasma...

article

Molecular mapping of a nuclear male-sterility gene in sunflower (Helianthus annuus L.) using TRAP and SSR markers

Junfang Chen, Jinguo Hu, Brady A. Vick, C. C. Jan

Theoretical and Applied Genetics > 2006 > 113 > 1 > 122-127

A nuclear male-sterile mutant, NMS 360, induced by streptomycin from an inbred maintainer line HA 89, possesses a single recessive gene, ms9, controlling male sterility. The present study identified DNA markers linked to the ms9 gene in an F₂ population derived from the cross of NMS 360 × RHA 271 and maps the ms9 gene to an existing sunflower SSR linkage map. Bulked segregant analysis was performed...

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