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Article: [Management advances of malignant tracheoesophageal fistula].

Wang, Q X / Shi, R H / Duan, Z H

2022 Volume 61, Issue 5, Page(s) 598–602

MeSH term(s)	Humans ; Tracheoesophageal Fistula/surgery
Language	Chinese
Publishing date	2022-04-29
Publishing country	China
Document type	Journal Article
ZDB-ID	754223-9
ISSN	0578-1426
ISSN	0578-1426
DOI	10.3760/cma.j.cn112138-20210524-00368
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Article: Synthesis and characterization of an anti-caries and remineralizing fluorine-containing cationic polymer PHMB-F

Chen, Y. D / Shu, C / Duan, Z. H / Xu, J. J / Li, X. J / Chen, F / Luo, Q. J / Li, X. D

Biomaterials science. 2021 Mar. 23, v. 9, no. 6

2021

Abstract: Dental caries have become a major global public health problem. Plaque control and remineralization of initial enamel lesions are paramount for the prevention and control of caries. Polyhexamethylene biguanide (PHMB) is a type of cationic amphipathic ... ...

Abstract	Dental caries have become a major global public health problem. Plaque control and remineralization of initial enamel lesions are paramount for the prevention and control of caries. Polyhexamethylene biguanide (PHMB) is a type of cationic amphipathic antibacterial agent with broad-spectrum antibacterial properties and good biological safety. Fluoride delays demineralization and promotes the remineralization of hard dental tissues. However, a high concentration is needed for it to function as an antibacterial agent. In order to create a PHMB with the benefits associated with fluoride, we synthesized a fluorine-containing cationic polymer, PHMB-F. Fourier transform-infrared spectroscopy and solid state nuclear magnetic resonance characterization confirmed the successful synthesis of PHMB-F. Antibacterial tests showed that PHMB-F had better antiseptic efficacy for Streptococcus mutans compared with just PHMB. Moreover, positively-charged PHMB-F allows fluoride ions to exist closer to the enamel surface with negative potential, which markedly lowers the ion concentrations in the microenvironment adjacent to hard dental tissues needed to maintain equilibrium. Thus, only low concentrations of PHMB-F are required for enamel remineralization.
Keywords	Fourier transform infrared spectroscopy ; Streptococcus mutans ; antibiotics ; antiseptics ; biocompatible materials ; dental caries ; enamel ; fluorides ; nuclear magnetic resonance spectroscopy ; polymers ; public health ; surfactants
Language	English
Dates of publication	2021-0323
Size	p. 2009-2019.
Publishing place	The Royal Society of Chemistry
Document type	Article
Note	NAL-AP-2-clean
ZDB-ID	2693928-9
ISSN	2047-4849 ; 2047-4830
ISSN (online)	2047-4849
ISSN	2047-4830
DOI	10.1039/d0bm01627f
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Synthesis and characterization of an anti-caries and remineralizing fluorine-containing cationic polymer PHMB-F.

Chen, Y D / Shu, C / Duan, Z H / Xu, J J / Li, X J / Chen, F / Luo, Q J / Li, X D

Biomaterials science

2020 Volume 9, Issue 6, Page(s) 2009–2019

Abstract	Dental caries have become a major global public health problem. Plaque control and remineralization of initial enamel lesions are paramount for the prevention and control of caries. Polyhexamethylene biguanide (PHMB) is a type of cationic amphipathic antibacterial agent with broad-spectrum antibacterial properties and good biological safety. Fluoride delays demineralization and promotes the remineralization of hard dental tissues. However, a high concentration is needed for it to function as an antibacterial agent. In order to create a PHMB with the benefits associated with fluoride, we synthesized a fluorine-containing cationic polymer, PHMB-F. Fourier transform-infrared spectroscopy and solid state nuclear magnetic resonance characterization confirmed the successful synthesis of PHMB-F. Antibacterial tests showed that PHMB-F had better antiseptic efficacy for Streptococcus mutans compared with just PHMB. Moreover, positively-charged PHMB-F allows fluoride ions to exist closer to the enamel surface with negative potential, which markedly lowers the ion concentrations in the microenvironment adjacent to hard dental tissues needed to maintain equilibrium. Thus, only low concentrations of PHMB-F are required for enamel remineralization.
MeSH term(s)	Biguanides ; Cariostatic Agents ; Dental Caries/drug therapy ; Dental Caries/prevention & control ; Fluorides ; Fluorine ; Humans ; Polymers ; Tooth Remineralization
Chemical Substances	Biguanides ; Cariostatic Agents ; Polymers ; Fluorine (284SYP0193) ; polihexanide (322U039GMF) ; Fluorides (Q80VPU408O)
Language	English
Publishing date	2020-12-22
Publishing country	England
Document type	Journal Article
ZDB-ID	2693928-9
ISSN	2047-4849 ; 2047-4830
ISSN (online)	2047-4849
ISSN	2047-4830
DOI	10.1039/d0bm01627f
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Article: Preliminary treatment of phenanthrene in coking wastewater by a combined potassium ferrate and Fenton process

Li, Y. N / Duan, Z. H / Wang, G. Y / Wang, Y. F / Yuan, Z. J

International journal of environmental science and technology. 2019 Aug., v. 16, no. 8

2019

Abstract: Polycyclic aromatic hydrocarbons in coking wastewater are difficult to remove due to their complex composition, poor biodegradability, and toxicity. In this work, the potassium ferrate process and the traditional Fenton process were compared to a ... ...

Abstract	Polycyclic aromatic hydrocarbons in coking wastewater are difficult to remove due to their complex composition, poor biodegradability, and toxicity. In this work, the potassium ferrate process and the traditional Fenton process were compared to a combination of the ferrate(VI) and Fenton processes for the purpose of degrading phenanthrene, a typical polycyclic aromatic hydrocarbon. A series of laboratory-scale experiments were conducted to investigate the chemical reaction kinetics of the ferrate(VI) process and the optimum reaction conditions of ferrate(VI) process and the combined ferrate(VI) and Fenton process. The optimum pH of the ferrate(VI) process was 6, and the apparent activation energy of the reaction was found 29.68 kJ/mol. In contrast, the optimum conditions for the combined process was an initial pH of 5 and a molar ratio of PHE:K2FeO4:H2O2 of 1:2:2. Under these conditions, the maximum removal efficiency of the combined process reached 84.01%, increased by 10.35% and 31.4% of the maximum rate achieved in the ferrate(VI) process and the Fenton process, respectively. The combined ferrate(VI) and Fenton process also had the advantage of no additional Fe(II) catalyst being required throughout the whole reaction process, resulting in a relatively low initial cost for the practical application of the combined process.
Keywords	activation energy ; biodegradability ; catalysts ; chemical reactions ; industrial wastewater ; iron ; laboratory experimentation ; pH ; phenanthrenes ; potassium ; reaction kinetics ; toxicity
Language	English
Dates of publication	2019-08
Size	p. 4483-4492.
Publishing place	Springer Berlin Heidelberg
Document type	Article
ZDB-ID	2230399-6
ISSN	1735-2630 ; 1735-1472
ISSN (online)	1735-2630
ISSN	1735-1472
DOI	10.1007/s13762-018-2037-8
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Article: Hydrological and water chemical factors in the Yichang reach of the Yangtze River pre- and post-impoundment of the Three Gorges Reservoir: consequences for the Chinese sturgeon Acipenser sinensis spawning population (a perspective)

Xiao, H / Duan, Z.-H

Journal of applied ichthyology Zeitschrift für angewandte Ichthyology. 2011 Apr., v. 27, no. 2

2011

Abstract: In order to understand the downstream hydrological and water chemical status after impoundment of the Three Gorges Reservoir (TGR) and to assess the impact of changes on the spawning of Chinese Sturgeon, we assessed hydrological factors (water ... ...

Abstract	In order to understand the downstream hydrological and water chemical status after impoundment of the Three Gorges Reservoir (TGR) and to assess the impact of changes on the spawning of Chinese Sturgeon, we assessed hydrological factors (water temperature, water level, water discharge and sediment concentration), and some water chemical factors (dissolved oxygen and ammonia-N) at the Yichang spawning reach during pre-and post-impoundment periods. In addition, hydro-acoustic survey on the occurrence and distribution of Chinese sturgeon were undertaken and investigations on sturgeon-egg-eating predatory fishes were conducted to evaluate the spawning occurrence date of the Chinese sturgeon during autumn between 1997 and 2008. The main subject of interest is whether changes in spawning ground conditions occurred in pre and post impoundment periods, from 1998 to 2008. After impoundment of TGR, when spawning occurred, many environmental factors decreased from pre-impoundment levels: sediment concentration (down 96.30%), water discharge (down 33.44%), flow velocity (down 12.20%) and water level (down 4.52%). Judging from the annual cycle, annual mean ammonia-N decreased by 50.9%, annual mean dissolved oxygen concentration also decreased by 9.6%. However, some factors increased: monthly average water temperature (increase 7.5% to a mean of 18.7°C) in every Nov after impoundment. The analysis showed that the number of days with suitable water temperature for Chinese sturgeon spawning between Oct and Nov varied according to the highest impoundment level of the TGR. The annual natural spawning activity showed that there were two spawning periods each year from 1997 to 2002 (pre-impoundment period) with the exception of 1998, but there was only one spawning period each year from 2003 to 2008 (post-impoundment period). There was annual average 369 adults in 1998-2002, and there was annual average 231 adults in 2004-2008.There was annual spawning magnitude 3547.5 ten thousand eggs in 1997, and there was only 193.5 ten thousand eggs in 2008.The date for the beginning of spawning was delayed gradually by the impoundment of TGR. The later spawning periods may relate to a change in original water temperature rhythm in the Yichang spawning reach and reaching the upper limit of the spawning temperature in the fall after 2003 may also be the key to regulate occurrence of reproduction and its intensity.
Keywords	Acipenser ; adults ; ammonium nitrogen ; autumn ; dissolved oxygen ; eggs ; environmental factors ; hydrologic factors ; oxygen ; reproduction ; sediment yield ; spawning ; sturgeon ; surveys ; water reservoirs ; water temperature ; Yangtze River
Language	English
Dates of publication	2011-04
Size	p. 387-393.
Publishing place	Blackwell Publishing Ltd
Document type	Article
ZDB-ID	283875-8
ISSN	0175-8659
ISSN	0175-8659
DOI	10.1111/j.1439-0426.2011.01745.x
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online ; Research data: (with research data) A field test of a model for the stability of androdioecy in the freshwater shrimp, Eulimnadia texana.

Weeks, S C / Benvenuto, C / Reed, S K / Duff, R J / Duan, Z-H / David, P

Journal of evolutionary biology

2014 Volume 27, Issue 10, Page(s) 2080–2095

Abstract: The evolution of hermaphroditism from dioecy is a poorly studied transition. Androdioecy (the coexistence of males and hermaphrodites) has been suggested as an intermediate step in this evolutionary transition or could be a stable reproductive mode. ... ...

Abstract	The evolution of hermaphroditism from dioecy is a poorly studied transition. Androdioecy (the coexistence of males and hermaphrodites) has been suggested as an intermediate step in this evolutionary transition or could be a stable reproductive mode. Freshwater crustaceans in the genus Eulimnadia have reproduced via androdioecy for 24+ million years and thus are excellent organisms to test models of the stability of androdioecy. Two related models that allow for the stable maintenance of males and hermaphrodites rely on the counterbalancing of three life history parameters. We tested these models in the field over three field seasons and compared the results to previous laboratory estimates of these three parameters. Male and hermaphroditic ratios within years were not well predicted using either the simpler original model or a version of this model updated to account for differences between hermaphroditic types ('monogenic' and 'amphigenic' hermaphrodites). Using parameter estimates of the previous year to predict the next year's sex ratios revealed a much better fit to the original relative to the updated version of the model. Therefore, counter to expectations, accounting for differences between the two hermaphroditic types did not improve the fit of these models. At the moment, we lack strong evidence that the long-term maintenance of androdioecy in these crustaceans is the result of a balancing of life history parameters; other factors, such as metapopulation dynamics or evolutionary constraints, may better explain the 24+ million year maintenance of androdioecy in clam shrimp.
MeSH term(s)	Animals ; Biological Evolution ; Decapoda (Crustacea)/genetics ; Fresh Water ; Hermaphroditic Organisms/genetics ; Inbreeding ; Longevity ; Male ; Models, Biological ; Sex Ratio
Language	English
Publishing date	2014-10
Publishing country	Switzerland
Document type	Journal Article ; Research Support, U.S. Gov't, Non-P.H.S.
ZDB-ID	1465318-7
ISSN	1420-9101 ; 1010-061X ; 1010-061X
ISSN (online)	1420-9101
ISSN	1010-061X
DOI	10.1111/jeb.12459
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Article: [Effectiveness of the "14 plus 7 day quarantine" and "nucleic acid plus total antibody testing" strategy for screening imported patients with COVID-19 in Xiamen].

Shen, L T / Duan, Z H / Chen, Z H / Yang, T C / Lin, T / Zhang, R Q / Jiang, L N / Zeng, X H / Wen, H X / Zhan, Q Y / Su, Y Y / Zhang, Y L / Peng, Z B / Zheng, J D / Zheng, R R / Qin, Y / Yuan, Q / Chen, C R

Zhonghua liu xing bing xue za zhi = Zhonghua liuxingbingxue zazhi

2021 Volume 42, Issue 6, Page(s) 1002–1007

Abstract: Objective: ...

Abstract	Objective:
MeSH term(s)	COVID-19 ; Humans ; Mass Screening ; Nucleic Acids ; Quarantine ; SARS-CoV-2
Chemical Substances	Nucleic Acids
Language	Chinese
Publishing date	2021-11-23
Publishing country	China
Document type	Journal Article
ZDB-ID	645026-x
ISSN	0254-6450
ISSN	0254-6450
DOI	10.3760/cma.j.cn112338-20210128-00076
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Article ; Online: Epidemiological features of traumatic spinal cord injury in Anhui Province, China.

Wang, H F / Yin, Z S / Chen, Y / Duan, Z H / Hou, S / He, J

Spinal cord

2013 Volume 51, Issue 1, Page(s) 20–22

Abstract: Study design: A retrospective hospital-based study.: Objectives: To describe the epidemiologic features of traumatic spinal cord injury (TSCI) in Anhui Province.: Setting: Two hospitals within Anhui Province, China.: Methods: We retrospectively ...

Abstract	Study design: A retrospective hospital-based study. Objectives: To describe the epidemiologic features of traumatic spinal cord injury (TSCI) in Anhui Province. Setting: Two hospitals within Anhui Province, China. Methods: We retrospectively reviewed the hospital records on all patients with TSCI, admitted between 1 January 2007 and 31 December 2010 (n=761). Variables included age, gender, occupation, neurological level, severity of injury, cause and treatment. Results: Seven hundred and sixty-one cases of TSCI were identified. Five hundred and eighty eight were males (77.3%) and 173 were females (22.7%), with a mean age of 45 years (s.d.=13, range from 5 to 87). Fall from height was the leading cause of injury (52.6%), followed by transport (21.2%). The neurological lesion levels were cervical (46.3%), lumbosacral (33.3%) and thoracic (20.4%). Conclusion: Prevention strategies for TSCI should target 30-60 age group, males, farmers and fall from height. The results of this study will serve as a basis for further studies on TSCI. The prevention strategies and treatment should be designed according to the injury features.
MeSH term(s)	Accidental Falls/statistics & numerical data ; Accidents, Occupational/statistics & numerical data ; Adolescent ; Adult ; Age Factors ; Aged ; Aged, 80 and over ; Child ; Child, Preschool ; China/epidemiology ; Female ; Humans ; Male ; Middle Aged ; Occupational Exposure ; Occupations ; Sex Factors ; Spinal Cord Injuries/epidemiology ; Spinal Cord Injuries/etiology ; Spinal Cord Injuries/surgery ; Young Adult
Language	English
Publishing date	2013-01
Publishing country	England
Document type	Journal Article
ZDB-ID	1316161-1
ISSN	1476-5624 ; 1362-4393
ISSN (online)	1476-5624
ISSN	1362-4393
DOI	10.1038/sc.2012.92
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Article ; Online: Serum levels of IL-33 and its receptor ST2 are elevated in patients with ankylosing spondylitis.

Li, G-X / Wang, S / Duan, Z-H / Zeng, Z / Pan, F-M

Scandinavian journal of rheumatology

2013 Volume 42, Issue 3, Page(s) 226–231

Abstract: Objectives: The aims of this study were to measure the levels of interleukin (IL)-33 and ST2 and T-helper (Th)2-associated cytokines (IL-13, IL-4, IL-5) in patients with ankylosing spondylitis (AS), and examine the correlation of serum cytokine levels ... ...

Abstract	Objectives: The aims of this study were to measure the levels of interleukin (IL)-33 and ST2 and T-helper (Th)2-associated cytokines (IL-13, IL-4, IL-5) in patients with ankylosing spondylitis (AS), and examine the correlation of serum cytokine levels with disease activity and laboratory parameters. Method: Serum IL-33, IL-13, IL-4, and IL-5 levels were assessed by sandwich enzyme-linked immunosorbent assay (ELISA), and the mRNA levels of IL-33 and ST2 were quantified by real-time quantitative polymerase chain reaction (RT-qPCR), in 43 AS samples and compared with 27 age- and sex-matched healthy controls. Results: Serum IL-33, IL-13, and IL-4 levels were increased significantly in AS patients compared with controls (p < 0.01); moreover, serum IL-33 and IL-13 levels were significantly higher in patients with active AS than in those with inactive AS (p < 0.05). The serum levels of IL-5 showed no significant difference between AS patients and controls (p > 0.05). Serum IL-33 levels were positively correlated with both IL-13 (r = 0.306, p < 0.01) and IL-4 levels (r = 0.432, p < 0.01). The mRNA levels of IL-33 and ST2 were significantly different between AS patients and controls (p < 0.01) but not between active and inactive AS patients. Conclusions: Serum levels of IL-33 could partially reflect AS disease activity and indicate that IL-33/ST2 signalling plays an important role in the pathogenesis of AS.
MeSH term(s)	Adult ; Case-Control Studies ; Female ; Humans ; Interleukin-1 Receptor-Like 1 Protein ; Interleukin-33 ; Interleukins/blood ; Male ; RNA, Messenger/blood ; Real-Time Polymerase Chain Reaction ; Receptors, Cell Surface/blood ; Spondylitis, Ankylosing/blood ; Th2 Cells/metabolism ; Young Adult
Chemical Substances	IL1RL1 protein, human ; IL33 protein, human ; Interleukin-1 Receptor-Like 1 Protein ; Interleukin-33 ; Interleukins ; RNA, Messenger ; Receptors, Cell Surface
Language	English
Publishing date	2013
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	121265-5
ISSN	1502-7732 ; 0300-9742
ISSN (online)	1502-7732
ISSN	0300-9742
DOI	10.3109/03009742.2012.735700
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Article ; Research data: (with research data) A field test of a model for the stability of androdioecy in the freshwater shrimp, Eulimnadia texana

Weeks, S. C / Benvenuto, C / Reed, S. K / Duff, R. J / Duan, Z.‐H / David, P

Journal of evolutionary biology. 2014 Oct., v. 27, no. 10

2014

Abstract	The evolution of hermaphroditism from dioecy is a poorly studied transition. Androdioecy (the coexistence of males and hermaphrodites) has been suggested as an intermediate step in this evolutionary transition or could be a stable reproductive mode. Freshwater crustaceans in the genus Eulimnadia have reproduced via androdioecy for 24+ million years and thus are excellent organisms to test models of the stability of androdioecy. Two related models that allow for the stable maintenance of males and hermaphrodites rely on the counterbalancing of three life history parameters. We tested these models in the field over three field seasons and compared the results to previous laboratory estimates of these three parameters. Male and hermaphroditic ratios within years were not well predicted using either the simpler original model or a version of this model updated to account for differences between hermaphroditic types (‘monogenic’ and ‘amphigenic’ hermaphrodites). Using parameter estimates of the previous year to predict the next year's sex ratios revealed a much better fit to the original relative to the updated version of the model. Therefore, counter to expectations, accounting for differences between the two hermaphroditic types did not improve the fit of these models. At the moment, we lack strong evidence that the long‐term maintenance of androdioecy in these crustaceans is the result of a balancing of life history parameters; other factors, such as metapopulation dynamics or evolutionary constraints, may better explain the 24+ million year maintenance of androdioecy in clam shrimp.
Keywords	Crustacea ; androdioecy ; clams ; dioecy ; evolution ; freshwater ; hermaphroditism ; life history ; males ; models ; shrimp
Language	English
Dates of publication	2014-10
Size	p. 2080-2095.
Publishing place	Birkhäuser
Document type	Article ; Research data
ZDB-ID	1465318-7
ISSN	1420-9101 ; 1010-061X ; 1010-061X
ISSN (online)	1420-9101
ISSN	1010-061X
DOI	10.1111/jeb.12459
Database	NAL-Catalogue (AGRICOLA)

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