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Article ; Online: Circ-STC2 promotes the ferroptosis of nucleus pulposus cells via targeting miR-486-3p/TFR2 axis.

Xiong, Liangping / Li, Xiaoyan / Hua, Xi / Qian, Zhonglai

Journal of orthopaedic surgery and research

2023 Volume 18, Issue 1, Page(s) 518

Abstract: Background: Low back pain (LBP) has become the second leading cause of disability worldwide, which has brought great economic burden to people. It is generally believed that intervertebral disc degeneration (IDD) is the main cause of LBP. This study ... ...

Abstract	Background: Low back pain (LBP) has become the second leading cause of disability worldwide, which has brought great economic burden to people. It is generally believed that intervertebral disc degeneration (IDD) is the main cause of LBP. This study aimed to explore the role of circ-STC2 in the pathogenesis of IDD. Methods: Nucleus pulposus cells (NPCs) were treated with T-Butyl Hydrogen Peroxide (TBHP) to establish IDD model in vitro. RT-qPCR was performed to detect mRNA expressions. The cell viability was detected with CCK-8 assay. The levels of lactate dehydrogenase (LDH), malondialdehyde (MDA), Fe Results: Circ-STC2 and TFR2 expressions were up-regulated in IDD tissues, and miR-486-3p expression was down-regulated. Knockdown of circ-STC2 promoted the cell viability and inhibited the ferroptosis of the NPCs. The GSH levels, and glutathione peroxidase 4 (GPX4) and solute carrier family 7 member 11 (SLC7A11) protein expressions were increased, the LDH, MDA and Fe Conclusions: Circ-STC2 inhibits the cell viability, induced the ferroptosis of the TBHP treated NPCs via targeting miR-486-3p/TFR2 axis.
MeSH term(s)	Humans ; Apoptosis ; Blotting, Western ; Cell Proliferation ; Cell Survival ; Ferroptosis ; Glycoproteins ; Hydrogen Peroxide ; Intercellular Signaling Peptides and Proteins ; Intervertebral Disc Degeneration/metabolism ; Intervertebral Disc Degeneration/pathology ; L-Lactate Dehydrogenase/metabolism ; Low Back Pain/metabolism ; Low Back Pain/pathology ; MicroRNAs/genetics ; Nucleus Pulposus/metabolism ; Nucleus Pulposus/pathology
Chemical Substances	Glycoproteins ; Hydrogen Peroxide (BBX060AN9V) ; Intercellular Signaling Peptides and Proteins ; L-Lactate Dehydrogenase (EC 1.1.1.27) ; MicroRNAs ; MIRN486 microRNA, human ; STC2 protein, human ; TFR2 protein, human
Language	English
Publishing date	2023-07-21
Publishing country	England
Document type	Journal Article
ZDB-ID	2252548-8
ISSN	1749-799X ; 1749-799X
ISSN (online)	1749-799X
ISSN	1749-799X
DOI	10.1186/s13018-023-04010-1
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Crystalline versus Amorphous: High-Performance Hafnium Phosphonate Framework for the Separation of Uranium and Transuranium Elements.

Qi, Songzhu / Xiong, Shunshun / Xiong, Liangping / Li, Hao / Liu, Boyu / Liu, Yi / Xiong, Ke / Yan, Heng / Lv, Kai / Liu, Hewen / Hu, Sheng

Inorganic chemistry

2023 Volume 62, Issue 28, Page(s) 10881–10886

Abstract: Metal phosphonate frameworks (MPFs) consisting of tetravalent metal ions and aryl-phosphonate ligands feature a large affinity for actinides and excellent stabilities in harsh aqueous environments. However, it remains elusive how the crystallinity of ... ...

Abstract	Metal phosphonate frameworks (MPFs) consisting of tetravalent metal ions and aryl-phosphonate ligands feature a large affinity for actinides and excellent stabilities in harsh aqueous environments. However, it remains elusive how the crystallinity of MPFs influences their performance in actinide separation. To this end, we prepared a new category of porous, ultrastable MPF with different crystallinities for uranyl and transuranium separation. The results demonstrated that crystalline MPF was generally a better adsorbent for uranyl than the amorphous counterpart and ranked as the top-performing one for uranyl and plutonium in strong acidic solutions. A plausible uranyl sequestration mechanism was unveiled by using powder X-ray diffraction in tandem with vibrational spectroscopy, thermogravimetry, and elemental analysis.
Language	English
Publishing date	2023-07-06
Publishing country	United States
Document type	Journal Article
ZDB-ID	1484438-2
ISSN	1520-510X ; 0020-1669
ISSN (online)	1520-510X
ISSN	0020-1669
DOI	10.1021/acs.inorgchem.3c01458
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Article: Ion exchange properties of cesium ion sieve based on zirconium molybdopyrophosphate

Lv, Kai / Xiong, Liang-Ping / Luo, Yang-Ming

Colloids and surfaces. 2013 Sept. 20, v. 433

2013

Abstract: Cesium ion sieve (Cs-IS) based on a novel ion exchanger, zirconium molybdopyrophosphate, was prepared via an impregnation–recrystallisation–leaching procedure. The physicochemical properties were determined using X-ray photoelectron spectra (XPS), ... ...

Abstract	Cesium ion sieve (Cs-IS) based on a novel ion exchanger, zirconium molybdopyrophosphate, was prepared via an impregnation–recrystallisation–leaching procedure. The physicochemical properties were determined using X-ray photoelectron spectra (XPS), simultaneous thermal analysis (DSC-TGA), nitrogen adsorption–desorption and scanning electron microscopy (SEM). The synthesized material was found to have a cesium exchange capacity (CEC) up to 1.38mmol/g, a good thermal stability up to 1000°C and an average mesopore size of 13.54nm. The surface characterizations revealed that cesium was distributed over the rough surface of the irregular particles. The removal of cesium from acidic media in batch conditions was evaluated focusing on kinetic, isotherm and selectivity. Ion exchange equilibrium was attained within 15h and best fitted into pseudo-second-order model. The calculated empirical thermodynamic functions hinted the ion exchange of cesium onto Cs-IS could be simplified to an enthalpy-driven, physical adsorption process. The effects of initial pH and ionic strength were explored. The selectivity of Cs-IS for cesium ion was found to be fairly desirable considering the solution acidity and the presence of a substantial amount of sodium ions.
Keywords	X-radiation ; X-ray photoelectron spectroscopy ; acidity ; adsorption ; cesium ; colloids ; ion exchange ; ionic strength ; ions ; models ; nitrogen ; pH ; scanning electron microscopy ; sodium ; thermal analysis ; thermal stability ; zirconium
Language	English
Dates of publication	2013-0920
Size	p. 37-46.
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	1500517-3
ISSN	0927-7757
ISSN	0927-7757
DOI	10.1016/j.colsurfa.2013.04.061
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Article: Studies on ion exchange behavior of cesium into zirconium molybdopyrophosphate and its application as precursor of cesium ion sieve

Lv, Kai / Luo, Yang-Ming / Xiong, Liang-Ping

Colloids and surfaces. 2013 Jan. 20, v. 417

2013

Abstract: A new inorganic ion exchanger, zirconium molybdopyrophosphate, was synthesized by both precipitation and hydrothermal reactions. Through orthogonal experiments the sample obtaining the highest cesium exchange capacity was chosen and characterized by X- ... ...

Abstract	A new inorganic ion exchanger, zirconium molybdopyrophosphate, was synthesized by both precipitation and hydrothermal reactions. Through orthogonal experiments the sample obtaining the highest cesium exchange capacity was chosen and characterized by X-ray diffraction, scanning electron microscope, specific surface area along with determination of pH at the point of zero charge. Batch experiments were carried out to evaluate the effects of operational parameters such as initial pH, exchanger dose, contact time and Cs⁺ concentration on the cesium exchange capacity of the optimum sample. Evolution of solution pH presented in each case evidenced the main Cs⁺–H⁺ ion exchange mechanism. The pH at the point of zero charge indicated this ion exchanger as monofunctional and acidic in character. The ion exchange process followed the Langmuir and pseudo-second-order model. The results showed that the optimum sample with a considerable capacity of 1.21mmol/g might be a suitable precursor for cesium ion-sieve.
Keywords	X-ray diffraction ; cesium ; colloids ; ion exchange ; models ; pH ; scanning electron microscopes ; surface area ; zirconium
Language	English
Dates of publication	2013-0120
Size	p. 243-249.
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	1500517-3
ISSN	0927-7757
ISSN	0927-7757
DOI	10.1016/j.colsurfa.2012.09.037
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Article: PFNA-II protrusion over the greater trochanter in the Asian population used in proximal femoral fractures.

Hu, Sun-Jun / Chang, Shi-Min / Ma, Zhuo / Du, Shou-Chao / Xiong, Liang-Ping / Wang, Xin

Indian journal of orthopaedics

2016 Volume 50, Issue 6, Page(s) 641–646

Abstract: Background: The treatment of proximal femoral fractures in geriatric osteoporotic patients continues to be a challenge in orthopaedic trauma. Various kinds of cephalomedullary nails, such as gamma nail, InterTan and PFNA were used clinically. The latest ...

Abstract	Background: The treatment of proximal femoral fractures in geriatric osteoporotic patients continues to be a challenge in orthopaedic trauma. Various kinds of cephalomedullary nails, such as gamma nail, InterTan and PFNA were used clinically. The latest generation PFNA II, specially designed for Asian population, is commonly used for geriatric per-/intertrochanteric fractures. The aim of this study was to determine whether the current PFNA-II proximal segment length is suitable for the greater trochanter height, as assessed by postoperative radiograph measurements. Materials and methods: 51 consecutive patients with per-/intertrochanteric fractures treated with the PFNA-II between July 2012 and December 2012 were enrolled in this study. There were 19 males and 32 females, with an average age of 78.6 years (range 66-92 years). According to AO/OTA classification system, there were 4 cases of 31A1 fractures, 35 cases of 31A2 fractures, and 12 cases of 31A3 fractures. The nail protrusion height over the lateral greater trochanter and the Parker ratio of the helical blade tip in the femoral head were measured and compared using pelvic digital anteroposterior radiographs taken within 2 weeks postoperatively. Patients were followed up for a minimum period of 1 year to check whether they had lateral trochanter pain. Results: Postoperative digital anteroposterior (AP) films were used for assessment and any prominence was recorded as positive. Overall, nail protrusion over the greater trochanter occurred in 87.8% of cases. In 60.8% of the cases, protrusion height was >5 mm. The average protrusion height was 6.25 ± 4.27 mm (male average 4.84 ± 4.38 mm, and female average 7.09 ± 4.70 mm). The average Parker ratio of all cases was 51.0 ± 6.9% (male average 49.8 ± 7.5% and female average 51.7 ± 6.5%). Protrusion height was positively correlated ( Conclusions: There was a morphologic mismatch between the proximal segment length of the PFNA-II and the greater trochanter in the Asian population, which may be the cause of postoperative lateral trochanter pain. A modification to shorten the proximal part of the nail is proposed to avoid protrusion over the greater trochanter.
Language	English
Publishing date	2016-11-30
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	603194-8
ISSN	0019-5413
ISSN	0019-5413
DOI	10.4103/0019-5413.193475
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Article: Synthesis of SiC ceramic fibers from nuclear reactor irradiated polycarbosilane ceramic precursor fibers

Xiong, Liangping / Yunshu Xu / Yang Li / Xiulong Xia

Journal of materials science. 2008 July, v. 43, no. 14

2008

Abstract: Polycarbosilane (PCS) ceramic precursor fibers are irradiated in a nuclear reactor and pyrolyzed under inert atmosphere. Bridge structure of Si–CH₂–Si is formed in the irradiated products by the rupture of Si–H bonds and succeeding cross-linking. When ... ...

Abstract	Polycarbosilane (PCS) ceramic precursor fibers are irradiated in a nuclear reactor and pyrolyzed under inert atmosphere. Bridge structure of Si–CH₂–Si is formed in the irradiated products by the rupture of Si–H bonds and succeeding cross-linking. When irradiated at the neutron fluence of 2.2 × 10¹⁷ cm⁻² under N₂ atmosphere, the gel content and ceramic yield at 1,273 K of PCS fibers are up to 80% and 94.3%, respectively, and their pyrolysis products are still fibrous, which illuminates that the infusibility of PCS fibers has been achieved. FT-IR spectra indicate that the chemical structure of pyrolysis products is very similar to that of pure SiC, while X-ray diffraction curves suggest that β-SiC microcrystals are formed in the fibers, and their mean grain size is about 7.5 nm. The oxygen content (1.69–3.77 wt%) is much lower than that of conventional SiC fibers by oxidation curing method (about 15 wt%). Tensile strength of the SiC fibers is up to 2.72 GPa, which demonstrates that their mechanical properties are excellent. After heat-treated at 1,673 K in air for an hour or at 1,873 K under Ar gas atmosphere for 0.5 h, their external appearance is still undamaged and dense, and their tensile strength decreases to a small extent, which verifies that heat resistance of the SiC fibers is eximious.
Keywords	Fourier transform infrared spectroscopy ; X-ray diffraction ; air ; argon (noble gases) ; ceramics ; chemical bonding ; crosslinking ; gels ; heat tolerance ; heat treatment ; irradiation ; nitrogen ; oxidation ; oxygen ; pyrolysis ; silicon carbide ; synthetic fibers ; tensile strength
Language	English
Dates of publication	2008-07
Size	p. 4849-4855.
Publishing place	Springer US
Document type	Article
ZDB-ID	2015305-3
ISSN	1573-4803 ; 0022-2461
ISSN (online)	1573-4803
ISSN	0022-2461
DOI	10.1007/s10853-008-2703-1
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Article: Preparation and characterization of hydrophobic Pt–Fe catalysts with enhanced catalytic activities for interface hydrogen isotope separation

Hu, Sheng / Hou, Jingwei / Xiong, Liangping / Weng, Kuiping / Ren, Xingbi / Luo, Yangming

Journal of hazardous materials. 2012 Mar. 30, v. 209-210

2012

Abstract: Liquid phase catalytic exchange reactions are mainly used for separation of hydrogen isotopes from liquid water. Based on the carbon-supported Pt and Pt–Fe catalysts, different hydrophobic Pt and Pt–Fe catalysts were fabricated for use in such reactions. ...

Abstract	Liquid phase catalytic exchange reactions are mainly used for separation of hydrogen isotopes from liquid water. Based on the carbon-supported Pt and Pt–Fe catalysts, different hydrophobic Pt and Pt–Fe catalysts were fabricated for use in such reactions. The characterization results indicated the Pt–Fe alloy was formed in the Pt₃Fe/C catalyst prepared using a citric-acid-assisted NaBH₄ reduction method (CA-NaBH₄). However, there were more Fe oxide species and the Fe components existed independently in the Pt₃Fe/C catalyst prepared by the modified microwave-irradiated ethyl glycol reduction procedure (MI). Performance tests demonstrated that the activities of the hydrophobic Pt–Fe catalysts with appropriate Fe/Pt ratios, using the MI method, were enhanced because of the addition of Fe. In contrast, the hydrophobic Pt₃Fe catalyst prepared using the CA-NaBH₄ method had lower catalytic activity than pure Pt. Possible reasons were explained by reaction mechanisms of double routes of LPCE catalysis.
Keywords	alloys ; catalysts ; catalytic activity ; hydrogen ; hydrophobicity ; iron ; iron oxides ; isotopes ; reaction mechanisms
Language	English
Dates of publication	2012-0330
Size	p. 478-483.
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	1491302-1
ISSN	1873-3336 ; 0304-3894
ISSN (online)	1873-3336
ISSN	0304-3894
DOI	10.1016/j.jhazmat.2012.01.058
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Article: Hydrogen production by methane decomposition over Ni–Cu–SiO2 catalysts: effect of temperature on catalyst deactivation

Li, Jiamao / Xiao, Chao / Xiong, Liangping / Chen, Xiaojun / Zhao, Linjie / Dong, Liang / Du, Yang / Yang, Yong / Wang, Heyi / Peng, Shuming

RSC advances. 2016 May 27, v. 6, no. 57

2016

Abstract: Catalytic decomposition of methane (CDM) is a simple process for the production of high-purity, COX-free (CO or CO2) hydrogen. The CDM is a moderately endothermic reaction, and high temperatures are thermodynamically favorable for achieving high methane ... ...

Abstract	Catalytic decomposition of methane (CDM) is a simple process for the production of high-purity, COX-free (CO or CO2) hydrogen. The CDM is a moderately endothermic reaction, and high temperatures are thermodynamically favorable for achieving high methane conversion. However, Ni–Cu catalysts easily lose their activities at high temperature. To study the effect of temperature on the deactivation of Ni–Cu catalysts, a 65% Ni–15% Cu–SiO2 catalyst was prepared by the heterophase sol–gel method. A series of kinetic experiments (routes I, II, III) were designed to test the catalytic performance and generate by-product carbon structures. The effects of reaction temperature and methane dissociation rate on catalyst deactivation were studied. The phase transition temperature was estimated. Based on the kinetic experiments, TEM images, XRD data, TGA-DSC curves, and TEM-EDX data, a thoroughly deactivation study of the 65% Ni–15% Cu–SiO2 catalyst was carried out. The results of this study proved that high degree of graphitization was the key factor contributing to the deactivation of Ni–Cu catalysts. Fragmentation and phase separation at high temperature were both responsible for carbon atom enrichment and a high degree of graphitization, which in turn caused the 65% Ni–10% Cu–25% SiO2 catalyst to lose activity at high temperature.
Keywords	X-ray diffraction ; byproducts ; carbon ; carbon dioxide ; carbon monoxide ; catalysts ; catalytic activity ; differential scanning calorimetry ; dissociation ; endothermy ; energy-dispersive X-ray analysis ; hydrogen ; hydrogen production ; methane ; phase transition ; separation ; silica ; sol-gel processing ; temperature ; thermodynamics ; thermogravimetry ; transmission electron microscopy
Language	English
Dates of publication	2016-0527
Size	p. 52154-52163.
Publishing place	The Royal Society of Chemistry
Document type	Article
ISSN	2046-2069
DOI	10.1039/c6ra05782a
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Article: Hydrophobic Pt catalysts with different carbon substrates for the interphase hydrogen isotope separation

Hu, Sheng / Hou, Jingwei / Xiong, Liangping / Weng, Kuiping / Yang, Tongzai / Luo, Yangming

Separation and purification technology. 2011 Feb. 20, v. 77, no. 2

2011

Abstract: Pt particles were supported on three carbon substrates, namely multiwalled carbon nanotube, activated carbon, and Vulcan XC-72. Corresponding hydrophobic Pt catalysts for interphase H/D isotope separation were then fabricated. Catalytic performance tests ...

Abstract	Pt particles were supported on three carbon substrates, namely multiwalled carbon nanotube, activated carbon, and Vulcan XC-72. Corresponding hydrophobic Pt catalysts for interphase H/D isotope separation were then fabricated. Catalytic performance tests demonstrated that selection of an appropriate carbon substrate is a very effective approach to improve hydrophobic catalytic activity and reduce Pt usage. The activated carbon-based hydrophobic catalyst had the lowest activity of the three carbon substrate-based hydrophobic catalyst. The multiwalled carbon nanotubes, either as a substrate for Pt particles or as an addition to the traditional Vulcan XC-72-based hydrophobic catalyst, promoted catalytic activity of the hydrophobic catalyst. The physicochemical characterizations of the carbon substrates, the carbon-supported Pt catalyst, and the hydrophobic catalytic membranes were analyzed. The characterization results explained why these hydrophobic catalysts had different catalytic activities.
Keywords	activated carbon ; carbon nanotubes ; catalysts ; catalytic activity ; hydrogen ; hydrophobicity ; interphase ; isotopes
Language	English
Dates of publication	2011-0220
Size	p. 214-219.
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	2022535-0
ISSN	1383-5866
ISSN	1383-5866
DOI	10.1016/j.seppur.2010.12.008
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Article ; Online: Preparation and characterization of hydrophobic Pt-Fe catalysts with enhanced catalytic activities for interface hydrogen isotope separation.

Hu, Sheng / Hou, Jingwei / Xiong, Liangping / Weng, Kuiping / Ren, Xingbi / Luo, Yangming

Journal of hazardous materials

2012 Volume 209-210, Page(s) 478–483

Abstract: Liquid phase catalytic exchange reactions are mainly used for separation of hydrogen isotopes from liquid water. Based on the carbon-supported Pt and Pt-Fe catalysts, different hydrophobic Pt and Pt-Fe catalysts were fabricated for use in such reactions. ...

Abstract	Liquid phase catalytic exchange reactions are mainly used for separation of hydrogen isotopes from liquid water. Based on the carbon-supported Pt and Pt-Fe catalysts, different hydrophobic Pt and Pt-Fe catalysts were fabricated for use in such reactions. The characterization results indicated the Pt-Fe alloy was formed in the Pt(3)Fe/C catalyst prepared using a citric-acid-assisted NaBH(4) reduction method (CA-NaBH(4)). However, there were more Fe oxide species and the Fe components existed independently in the Pt(3)Fe/C catalyst prepared by the modified microwave-irradiated ethyl glycol reduction procedure (MI). Performance tests demonstrated that the activities of the hydrophobic Pt-Fe catalysts with appropriate Fe/Pt ratios, using the MI method, were enhanced because of the addition of Fe. In contrast, the hydrophobic Pt(3)Fe catalyst prepared using the CA-NaBH(4) method had lower catalytic activity than pure Pt. Possible reasons were explained by reaction mechanisms of double routes of LPCE catalysis.
MeSH term(s)	Catalysis ; Hydrogen/chemistry ; Iron/chemistry ; Isotopes ; Microscopy, Electron, Transmission ; Platinum/chemistry ; X-Ray Diffraction
Chemical Substances	Isotopes ; Platinum (49DFR088MY) ; Hydrogen (7YNJ3PO35Z) ; Iron (E1UOL152H7)
Language	English
Publishing date	2012-03-30
Publishing country	Netherlands
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	1491302-1
ISSN	1873-3336 ; 0304-3894
ISSN (online)	1873-3336
ISSN	0304-3894
DOI	10.1016/j.jhazmat.2012.01.058
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