276
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Xiong WL, Wang YL, Liu QY, Yao Y, Xiong LH. Two lanthanide coordination polymers with helical chain structures synthesized ionothermally from a deep-eutectic solvent: syntheses, structures and luminescence. INORG CHEM COMMUN 2014. [DOI: 10.1016/j.inoche.2014.06.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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277
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Wang XH, Liu SQ, Wang YL, Jin Y. Correlation of serum high-sensitivity C-reactive protein and interleukin-6 in patients with acute coronary syndrome. GENETICS AND MOLECULAR RESEARCH 2014; 13:4260-6. [PMID: 25036169 DOI: 10.4238/2014.june.9.11] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Serum high-sensitivity C-reactive protein (hs-CRP) is a sensitive indicator of inflammation, which is closely related with the progress of plaque formation. Interleukin-6 (IL-6) is one of the inflammatory markers of local coronary plaque and the peripheral blood cycle, promoting the occurrence of atherosclerosis development and plaque rupture. In this study, the correlation of hs-CRP and IL-6 was investigated in patients with acute coronary syndrome (ACS). Sixty cases of ACS, including 33 cases of acute myocardial infarction (AMI) and 27 cases of unstable angina pectoris (UAP), 45 cases of stable angina pectoris (SAP), and 45 healthy people (HG) were enrolled in study. The serum hs-CRP and serum IL-6 levels were tested by the immune turbidimetric method and enzyme-linked immunosorbent assay (ELISA), respectively. The differences among groups and their correlations were evaluated. Results showed that the serum hs-CRP and IL-6 concentrations of the AMI and UAP groups were significantly higher than those of the SAP and HG groups, respectively (P<0.01), and those of the AMI group were significantly higher than those of the UAP group (P<0.05). The serum hs-CRP and IL-6 levels of the ACS group were positively correlated (r=0.836). The serum hs-CRP and IL-6 levels could be used to determine the stability of plaque, and have some relevance in the ACS process, showing great value in judgments of ACS prognosis.
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278
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Yuan DQ, Wang YL, Feng J. Contribution of stratified extracellular polymeric substances to the gel-like and fractal structures of activated sludge. WATER RESEARCH 2014; 56:56-65. [PMID: 24651018 DOI: 10.1016/j.watres.2014.02.028] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2013] [Revised: 02/09/2014] [Accepted: 02/12/2014] [Indexed: 05/06/2023]
Abstract
The gel-like and fractal structures of activated sludge (AS) before and after extracellular polymeric substances (EPS) extraction as well as different EPS fractions were investigated. The contributions of individual components in different EPS fractions to the gel-like behavior of sludge samples by enzyme treatment were examined as well. The centrifugation and ultrasound method was employed to stratify the EPS into slime, loosely and tightly bound EPS (LB- and TB-EPS). It was observed that all samples behaved as weak gels with weak-link. TB-EPS and AS after LB-EPS extraction showed the strongest elasticity in higher concentrations and highest mass fractal dimension, which may indicate the key role of TB-EPS in the gel-like and fractal structures of the sludge. Effects of protease or amylase on the gel-like property of sludge samples differed in the presence of different EPS fractions.
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279
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Guo H, Liu XL, Wang YL, Li JY, Lu WZ, Xian JZ, Zhang BM, Li J. Protection of skin with subcutaneous administration of 5% dextrose in water during superficial radiofrequency ablation in a rabbit model. Int J Hyperthermia 2014; 30:258-65. [DOI: 10.3109/02656736.2014.914250] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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280
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Chu P, Chen DP, Wang YL, Xie YL, Yan ZB, Wan JG, Liu JM, Li JY. Kinetics of 90° domain wall motions and high frequency mesoscopic dielectric response in strained ferroelectrics: a phase-field simulation. Sci Rep 2014; 4:5007. [PMID: 24845806 PMCID: PMC4028899 DOI: 10.1038/srep05007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Accepted: 05/01/2014] [Indexed: 11/20/2022] Open
Abstract
The dielectric and ferroelectric behaviors of a ferroelectric are substantially determined by its domain structure and domain wall dynamics at mesoscopic level. A relationship between the domain walls and high frequency mesoscopic dielectric response is highly appreciated for high frequency applications of ferroelectrics. In this work we investigate the low electric field driven motion of 90°-domain walls and the frequency-domain spectrum of dielectric permittivity in normally strained ferroelectric lattice using the phase-field simulations. It is revealed that, the high-frequency dielectric permittivity is spatially inhomogeneous and reaches the highest value on the 90°-domain walls. A tensile strain favors the parallel domains but suppresses the kinetics of the 90° domain wall motion driven by electric field, while the compressive strain results in the opposite behaviors. The physics underlying the wall motions and thus the dielectric response is associated with the long-range elastic energy. The major contribution to the dielectric response is from the polarization fluctuations on the 90°-domain walls, which are more mobile than those inside the domains. The relevance of the simulated results wth recent experiments is discussed.
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281
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Zhang CW, Xu JH, Wang YL, Xu W, Li K. Survey and analysis of visual acuity of Kazakhs in different lighting environments. GENETICS AND MOLECULAR RESEARCH 2014; 13:2451-7. [PMID: 24781999 DOI: 10.4238/2014.april.3.17] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The effect of different lighting environments on the vision and refractive error were investigated in 427 Kazakhs (828 eyes) aged from 40 to 60 years old, of which 279 were pastoral (546 eyes) and 148 were urban (282 eyes). Pastoral Kazakhs use natural illumination, whereas city Kazakhs mainly use artificial illumination. Of all cases, 19.1% (54 cases) had a vision of 0.4 to 0.5, 20.9% (59 cases) had 0.6 to 0.8, and 17.7% (50 cases) had above 1.0. However, the visual acuity distribution of the pastoral Kazakhs had a more obvious characteristic, which was mainly concentrated above 0.6. The vision of 25.1% (137) of cases was 0.6 to 0.8, whereas 58.4% (319) of cases had vision above 1.0. There were more cases with vision above 1.0 in the pastoral Kazakhs compared to the city Kazakhs (P < 0.05). The diopter of the city Kazakhs was between 0 D and -4.0 D, whereas that of the pastoral Kazakhs was between +2.0 D and -2.0 D. Diopters between +2.0 D and 0 D or less than 3.0 D differed significantly between the two groups. Daylight lamps were the main illumination photosources of the city Kazakhs. Artificial light illuminated 70.9% (105 cases) of the city Kazakhs for more than 6 h. By contrast, natural light illuminated 75.3% (210 cases) of the pastoral Kazakhs for an outdoor activity time of more than 9 h. These results suggest that poor lighting environment is a very important factor contributing to refractive error.
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282
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Cao HY, Liu QY, Gao MJ, Wang YL, Chen LL, Liu Y. Ionothermal syntheses, crystal structures and luminescence of three three-dimensional lanthanide-1,4-benzenedicarboxylate frameworks. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.02.014] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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283
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Yin HL, Wang YL, Li JF, Han B, Zhang XX, Wang YT, Geng S. Effects of curcumin on hippocampal expression of NgR and axonal regeneration in Aβ-induced cognitive disorder rats. GENETICS AND MOLECULAR RESEARCH 2014; 13:2039-47. [PMID: 24737429 DOI: 10.4238/2014.march.24.8] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Curcumin has been widely used for the prevention and treatment of Alzheimer's disease (AD), but its mechanism is still not clear. Inhibitory factors of axonal regeneration have been shown to cause a series of pathophysiological changes in the early period of AD. In this study, the co-receptor (Nogo receptor; NgR) of three axonal growth-inhibitory proteins was examined, and effects of curcumin on spatial learning and memory abilities and hippocampal axonal growth were investigated in amyloid β-protein (Aβ)1-40-induced AD rats. Results showed that the expression of NgR in the AD group significantly increased and the number of axonal protein-positive fibers significantly reduced. The spatial learning and memory abilities of AD rats were significantly improved in the curcumin group. Furthermore, hippocampal expressions of NgR mRNA and protein decreased, and the expression of axonal protein significantly increased. There was a negative correlation between the expression of NgR and axonal growth. Together, these results suggested that curcumin could improve the spatial learning and memory abilities of AD rats. The mechanism might be related with its lowering of hippocampal NgR expression and promoting axonal regeneration.
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284
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Hung MH, Liu CY, Shiau CY, Hsu CY, Tsai YF, Wang YL, Tai LC, King KL, Chao TC, Chiu JH, Su CH, Lo SS, Tzeng CH, Shyr YM, Tseng LM. Effect of age and biological subtype on the risk and timing of brain metastasis in breast cancer patients. PLoS One 2014; 9:e89389. [PMID: 24586742 PMCID: PMC3933537 DOI: 10.1371/journal.pone.0089389] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Accepted: 01/20/2014] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Brain metastasis is a major complication of breast cancer. This study aimed to analyze the effect of age and biological subtype on the risk and timing of brain metastasis in breast cancer patients. PATIENTS AND METHODS We identified subtypes of invasive ductal carcinoma of the breast by determining estrogen receptor, progesterone receptor and HER2 status. Time to brain metastasis according to age and cancer subtype was analyzed by Cox proportional hazard analysis. RESULTS Of the 2248 eligible patients, 164 (7.3%) developed brain metastasis over a median follow-up of 54.2 months. Age 35 or younger, HER2-enriched subtype, and triple-negative breast cancer were significant risk factors of brain metastasis. Among patients aged 35 or younger, the risk of brain metastasis was independent of biological subtype (P = 0.507). Among patients aged 36-59 or >60 years, those with triple-negative or HER2-enriched subtypes had consistently increased risk of brain metastasis, as compared with those with luminal A tumors. Patients with luminal B tumors had higher risk of brain metastasis than luminal A only in patients >60 years. CONCLUSIONS Breast cancer subtypes are associated with differing risks of brain metastasis among different age groups. Patients age 35 or younger are particularly at risk of brain metastasis independent of biological subtype.
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285
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Cao HY, Liu QY, Li LQ, Wang YL, Chen LL, Yao Y. Two Cadmium Coordination Compounds with 5-Sulfonyl-1,2,4-benzenetricarboxylate Ligand: Syntheses, Structures, and Photoluminescence. Z Anorg Allg Chem 2014. [DOI: 10.1002/zaac.201300681] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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286
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Wan GH, Wu CL, Chen YF, Huang SH, Wang YL, Chen CW. Particle size concentration distribution and influences on exhaled breath particles in mechanically ventilated patients. PLoS One 2014; 9:e87088. [PMID: 24475230 PMCID: PMC3903594 DOI: 10.1371/journal.pone.0087088] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Accepted: 12/19/2013] [Indexed: 11/19/2022] Open
Abstract
Humans produce exhaled breath particles (EBPs) during various breath activities, such as normal breathing, coughing, talking, and sneezing. Airborne transmission risk exists when EBPs have attached pathogens. Until recently, few investigations had evaluated the size and concentration distributions of EBPs from mechanically ventilated patients with different ventilation mode settings. This study thus broke new ground by not only evaluating the size concentration distributions of EBPs in mechanically ventilated patients, but also investigating the relationship between EBP level and positive expiratory end airway pressure (PEEP), tidal volume, and pneumonia. This investigation recruited mechanically ventilated patients, with and without pneumonia, aged 20 years old and above, from the respiratory intensive care unit of a medical center. Concentration distributions of EBPs from mechanically ventilated patients were analyzed with an optical particle analyzer. This study finds that EBP concentrations from mechanically ventilated patients during normal breathing were in the range 0.47-2,554.04 particles/breath (0.001-4.644 particles/mL). EBP concentrations did not differ significantly between the volume control and pressure control modes of the ventilation settings in the mechanically ventilated patients. The patient EBPs were sized below 5 µm, and 80% of them ranged from 0.3 to 1.0 µm. The EBPs concentrations in patients with high PEEP (> 5 cmH₂O) clearly exceeded those in patients with low PEEP (≤ 5 cmH₂O). Additionally, a significant negative association existed between pneumonia duration and EBPs concentration. However, tidal volume was not related to EBPs concentration.
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287
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Liu QY, Li YL, Xiong WL, Wang YL, Luo F, Liu CM, Chen LL. Urothermal synthesis of mononuclear lanthanide compounds: slow magnetization relaxation observed in Dy analogue. CrystEngComm 2014. [DOI: 10.1039/c3ce41762j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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288
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Xie YL, Chu P, Wang YL, Chen JP, Yan ZB, Liu JM. Wang-Landau sampling with logarithmic windows for continuous models. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2014; 89:013311. [PMID: 24580364 DOI: 10.1103/physreve.89.013311] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Indexed: 06/03/2023]
Abstract
We present a modified Wang-Landau sampling (MWLS) for continuous statistical models by partitioning the energy space into a set of windows with logarithmically shrinking width. To demonstrate its necessity and advantages, we apply this sampling to several continuous models, including the two-dimensional square XY spin model, triangular J1-J2 spin model, and Lennard-Jones cluster model. Given a finite number of bins for partitioning the energy space, the conventional Wang-Landau sampling may not generate sufficiently accurate density of states (DOS) around the energy boundaries. However, it is demonstrated that much more accurate DOS can be obtained by this MWLS, and thus a precise evaluation of the thermodynamic behaviors of the continuous models at extreme low temperature (kBT<0.1) becomes accessible. The present algorithm also allows efficient computation besides the highly reliable data sampling.
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289
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Liu QY, Li YL, Wang YL, Liu CM, Ding LW, Liu Y. Ionothermal synthesis of a 3D dysprosium–1,4-benzenedicarboxylate framework based on the 1D rod-shaped dysprosium–carboxylate building blocks exhibiting slow magnetization relaxation. CrystEngComm 2014. [DOI: 10.1039/c3ce41624k] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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290
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Zhang XG, Zhang ZL, Hu SY, Wang YL. Ultrasound-guided ablative therapy for hepatic malignancies : a comparison of the therapeutic effects of microwave and radiofrequency ablation. Acta Chir Belg 2014; 114:40-45. [PMID: 24720137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
BACKGROUND Radiofrequency ablation (RFA) is currently the most widely used thermal ablative technique for unresectable hepatic malignancies. However, microwave ablation (MWA) is also gaining popularity worldwide. With a cooled-tip electrode, MWA produces necrotic effects comparable to RFA without damaging soft tissues along the electrode track. In this study, the authors compared the efficacy of these two ablative modalities in the treatment of primary or secondary liver cancer. MATERIALS AND METHODS Ultrasound-guided MWA was employed to treat 230 cases of liver cancer with a total of 349 nodules and a diameter of 0.8-11.4 cm [mean: 5.7 +/- 2.1 cm]. Meanwhile, ultrasound-guided RFA was performed in 92 cases of liver cancer with 173 nodules in total and a diameter of 2.0-10.2 cm [mean: 5.4 +/- 1.9 cm]. The clinical data were retrospectively analyzed to identify the differences between MWA and RFA in terms of their operative safety, local ablative effect, cost efficiency, and cumulative survival rate. RESULTS The patient parameters were comparable. The area of coagulative necrosis was similar in both groups. The tumor complete ablation rate was 83.7% (292/349) for the MWA group and 86.7% (150/173) for the RFA group, which showed no significant difference (P = 0.75). The one-year and two-year cumulative survival rate were all comparable between the two groups (P = 0.66, P = 0.41), which were 90.0% (198/220), 81.6% (120/147) for the MWA group, and 91.8% (78/85), 81.0% (34/42) for the RFA group, respectively. Moreover, both the tumor type and number had no influence on survival rate for the two methods. In addition, there was no significant difference in complication rates between the two groups. The cost for performing one MWA procedure was about 40% lower than that of RFA ($1200 vs $2000). CONCLUSIONS Both MWA and RFA are safe and effective ablative treatments for liver cancer. Additionally, MWA has the advantage of cost efficiency.
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Zhan J, Xiao F, Zhang ZZ, Wang YP, Chen K, Wang YL. Effect of penehyclidine hydrochloride on β-arrestin-1 expression in lipopolysaccharide-induced human pulmonary microvascular endothelial cells. Braz J Med Biol Res 2013; 46:1040-1046. [PMID: 24345913 PMCID: PMC3935276 DOI: 10.1590/1414-431x20133289] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2013] [Accepted: 09/12/2013] [Indexed: 01/14/2023] Open
Abstract
β-arrestins are expressed proteins that were first described, and are well-known, as negative regulators of G protein-coupled receptor signaling. Penehyclidine hydrochloride (PHC) is a new anti-cholinergic drug that can inhibit biomembrane lipid peroxidation, and decrease cytokines and oxyradicals. However, to date, no reports on the effects of PHC on β-arrestin-1 in cells have been published. The aim of this study was to investigate the effect of PHC on β-arrestin-1 expression in lipopolysaccharide (LPS)-induced human pulmonary microvascular endothelial cells (HPMEC). Cultured HPMEC were pretreated with PHC, followed by LPS treatment. Muscarinic receptor mRNAs were assayed by real-time quantitative PCR. Cell viability was assayed by the methyl thiazolyl tetrazolium (MTT) conversion test. The dose and time effects of PHC on β-arrestin-1 expression in LPS-induced HPMEC were determined by Western blot analysis. Cell malondialdehyde (MDA) level and superoxide dismutase (SOD) activity were measured. It was found that the M3 receptor was the one most highly expressed, and was activated 5 min after LPS challenge. Furthermore, 2 μg/mL PHC significantly upregulated expression of β-arrestin-1 within 10 to 15 min. Compared with the control group, MDA levels in cells were remarkably increased and SOD activities were significantly decreased in LPS pretreated cells, while PHC markedly decreased MDA levels and increased SOD activities. We conclude that PHC attenuated ROS injury by upregulating β-arrestin-1 expression, thereby implicating a mechanism by which PHC may exert its protective effects against LPS-induced pulmonary microvascular endothelial cell injury.
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292
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Xiahou ZJ, Wang YL, Liu QY, Wei JJ, Chen LL. Ionothermal synthesis of a 3D heterometallic coordination polymer based on the rod shaped copper(II)–sodium(I)-carboxylate secondary building units with a pcu topology. INORG CHEM COMMUN 2013. [DOI: 10.1016/j.inoche.2013.09.076] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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293
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Wang YL, Wang ZJ, Shen HL, Yin M, Tang KX. Effects of artesunate and ursolic acid on hyperlipidemia and its complications in rabbit. Eur J Pharm Sci 2013; 50:366-71. [PMID: 23954455 DOI: 10.1016/j.ejps.2013.08.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2012] [Revised: 06/13/2013] [Accepted: 08/05/2013] [Indexed: 12/31/2022]
Abstract
OBJECTIVE To find the novel hypolipidemic agents, the effects of ursolic acid and artesunate on hyperlipidemia and its complications were determined in rabbit fed with Western-type diet. METHODS AND RESULTS New Zealand rabbits fed a Western-type diet developed a hyperlipidemia. Rabbits received ursolic acid (25mg/kg) or artesunate (25mg/kg) alone, or in combination (12.5+12.5mg/kg), to prevent hyperlipidemia. Ursolic acid or artesunate alone significantly decreased the plasma cholesterol and triglyceride in rabbits. Furthermore, they both attenuated liver steatosis and reduced the area of aortic root lesions. The combination of ursolic acid and artesunate was more potent than either agent alone, which indicates a strong synergistic effect. CONCLUSION The hypolipidemic effect of artesunate is firstly reported. Its combination with ursolic acid might have the potential to further develop for the treatment of atherosclerosis.
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294
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Yan WL, Wang YL, Chen YJ. Effect of conditioning by PAM polymers with different charges on the structural and characteristic evolutions of water treatment residuals. WATER RESEARCH 2013; 47:6445-6456. [PMID: 24011843 DOI: 10.1016/j.watres.2013.08.016] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Revised: 08/13/2013] [Accepted: 08/14/2013] [Indexed: 06/02/2023]
Abstract
Three types of polyacrylamide (PAM) flocculants with different charges (cationic PAM WD4960, nonionic PAM M351, and anionic PAM WDA110) were used for water treatment residuals (WTRs) conditioning, and the physicochemical, morphological and structural characteristics of raw and conditioned WTRs were investigated. Rheological methods were employed to analyze the internal structural transition between the raw and conditioned WTRs under a typical dosage of WD4960. Results showed that when the raw WTRs were conditioned with the polymers, the optimum dosage of WD4960 was 4.82 g/kg total suspended solid (TSS) while that of both M351 and WDA110 was 7.24 g/kg TSS. The residual PAM content in the supernatant of the WTR matrix conditioned at the optimum WD4960 dosage was 5.59 mg/L, which is the least among the supernatants obtained with the three types of PAM. Furthermore, the visible fulvic acid (FA) in the supernatant disappeared and the intensity of the ultraviolet FA decreased. The average diameter of irregularly shaped aggregates in the WTR suspensions increased from 35.73 μm to several hundred micrometers with increasing PAM dosage. The size of WTR aggregates conditioned at the optimum WD4960 dosage was much larger than that of aggregates obtained at the optimum M351 or WDA110 dosages. Two-dimensional fractal dimension (D2) values presented an increasing trend with increasing PAM dosage. D2 values of the conditioned WTR aggregates were 1.87, 1.76, and 1.83 at optimum WD4960, M351, and WDA110 dosages, respectively. The cationic PAM (CPAM) WD4960 thus appears to be a more ideal conditioner for WTRs. Consistent relationships were observed among the capillary suction time (CST), average particle size, and D2 values of the conditioned WTR aggregates at the optimum WD4960 dosage. Mass fractal dimensions (D(f)) indicated that both the raw and WD4960-conditioned WTRs behave like weak-link flocs/aggregates. D(f) values (log G'-log TSS) of the WTR aggregates before and after conditioning with the optimum WD4960 dosage were 2.79 and 2.81, respectively. Although the transition from an alum/ferric hydrogel to a cross-linked gel occurred during the WD4960-conditioning process, only a small amount of the alum/ferric hydrogel was destroyed, and the conditioned WTR aggregates showed a gel-like matrix in which residual alum-ferric hydrogels were embedded in cross-linked WD4960 molecules.
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295
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Gruznev DV, Matetskiy AV, Bondarenko LV, Utas OA, Zotov AV, Saranin AA, Chou JP, Wei CM, Lai MY, Wang YL. Stepwise self-assembly of C₆₀ mediated by atomic scale moiré magnifiers. Nat Commun 2013; 4:1679. [PMID: 23575683 DOI: 10.1038/ncomms2706] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2012] [Accepted: 03/06/2013] [Indexed: 11/09/2022] Open
Abstract
Self-assembly of atoms or molecules on a crystal surface is considered one of the most promising methods to create molecular devices. Here we report a stepwise self-assembly of C₆₀ molecules into islands with unusual shapes and preferred sizes on a gold-indium-covered Si(111) surface. Specifically, 19-mer islands prefer a non-compact boomerang shape, whereas hexagonal 37-mer islands exhibit extraordinarily enhanced stability and abundance. The stepwise self-assembly is mediated by the moiré interference between an island with its underlying lattice, which essentially maps out the adsorption-energy landscape of a C₆₀ on different positions of the surface with a lateral magnification factor and dictates the probability for the subsequent attachment of C₆₀ to an island's periphery. Our discovery suggests a new method for exploiting the moiré interference to dynamically assist the self-assembly of particles and provides an unexplored tactic of engineering atomic scale moiré magnifiers to facilitate the growth of monodispersed mesoscopic structures.
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Guo YJ, Liu GZ, Wang CM, Wang YY, Li HJ, Zhong K, Lu WF, Wang YL, Yang GY. Molecular cloning and expression of the porcine S14R gene in Escherichia coli. GENETICS AND MOLECULAR RESEARCH 2013; 12:4405-12. [PMID: 24222220 DOI: 10.4238/2013.october.10.6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
We amplified S14R protein gene cDNA of porcine, cloned it into a prokaryotic expression plasmid, and expressed it in Escherichia coli. A pair of primers was designed based on the cDNA sequence of the porcine S14R gene in GenBank. The target gene fragment from porcine liver tissue was amplified by RT-PCR. Confirmed by auto-sequencing, the target gene fragment was subcloned into an expression vector of pET28a. The pET28a-S14R construct was subsequently transformed into E. coli BL21 (DE3). This construct was verified by restriction endonuclease digestion and sequencing. Using isopropyl β-D-1-thiogalactopyranoside induction, a new recombinant protein with the expected relative molecular mass of 24 kDa appeared. The result was identified by SDS-PAGE electrophoresis. Porcine S14R includes 549bp (GenBank No. JN793537), with an open reading frame of 549 bp coding 182 amino acids.
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297
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Xiong WL, Wang YL, Liu QY. A three-dimensional polymeric potassium complex of 5-sulfonobenzene-1,2,4-tricarboxylic acid: poly[μ-aqua-aqua-μ9-(2,4-dicarboxy-5-sulfonatobenzoato)-dipotassium(I)]. Acta Crystallogr C 2013; 69:1132-5. [PMID: 24096501 DOI: 10.1107/s0108270113024499] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Accepted: 09/02/2013] [Indexed: 11/10/2022] Open
Abstract
The asymmetric unit in the structure of the title compound, [K2(C9H4O9S)(H2O)2]n, consists of two eight-coordinated K(I) cations, one 2,4-dicarboxy-5-sulfonatobenzoate dianion (H2SBTC(2-)), one bridging water molecule and one terminal coordinated water molecule. One K(I) cation is coordinated by three carboxylate O atoms and three sulfonate O atoms from four H2SBTC(2-) ligands and by two bridging water molecules. The second K(I) cation is coordinated by four sulfonate O atoms and three carboxylate O atoms from five H2SBTC(2-) ligands and by one terminal coordinated water molecule. The K(I) cations are linked by sulfonate groups to give a one-dimensional inorganic chain with cage-like K4(SO3)2 repeat units. These one-dimensional chains are bridged by one of the carboxylic acid groups of the H2SBTC(2-) ligand to form a two-dimensional layer, and these layers are further linked by the remaining carboxylate groups and the benzene rings of the H2SBTC(2-) ligands to generate a three-dimensional framework. The compound displays a photoluminescent emission at 460 nm upon excitation at 358 nm. In addition, the thermal stability of the title compound has been studied.
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298
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Wang YL, Xia ZH, Liu D, Qiu WX, Duan XL, Wang R, Liu WJ, Zhang YH, Wang D, Tao S, Liu WX. Multimedia fate and source apportionment of polycyclic aromatic hydrocarbons in a coking industry city in Northern China. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2013; 181:115-121. [PMID: 23845769 DOI: 10.1016/j.envpol.2013.06.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2013] [Revised: 06/08/2013] [Accepted: 06/11/2013] [Indexed: 06/02/2023]
Abstract
A steady state Level III fate model was established and applied to quantify source-receptor relationship in a coking industry city in Northern China. The local emission inventory of PAHs, as the model input, was acquired based on energy consumption and emission factors. The model estimations were validated by measured data and indicated remarkable variations in the paired isomeric ratios. When a rectification factor, based on the receptor-to-source ratio, was calculated by the fate model, the quantitatively verified molecular diagnostic ratios provided reasonable results of local PAH emission sources. Due to the local ban and measures on small scale coking activities implemented from the beginning of 2004, the model calculations indicated that the local emission amount of PAHs in 2009 decreased considerably compared to that in 2003.
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299
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Wang Y, Zhang ZZ, Wu Y, Ke JJ, He XH, Wang YL. Quercetin postconditioning attenuates myocardial ischemia/reperfusion injury in rats through the PI3K/Akt pathway. Braz J Med Biol Res 2013; 46:861-7. [PMID: 24068165 PMCID: PMC3854307 DOI: 10.1590/1414-431x20133036] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2013] [Accepted: 07/15/2013] [Indexed: 11/24/2022] Open
Abstract
Quercetin (Que), a plant-derived flavonoid, has multiple benefical actions on the
cardiovascular system. The current study investigated whether Que
postconditioning has any protective effects on myocardial ischemia/reperfusion
(I/R) injury in vivo and its potential cardioprotective
mechanisms. Male Sprague-Dawley rats were randomly allocated to 5 groups (20
animals/group): sham, I/R, Que postconditioning, Que+LY294002 [a
phosphatidylinositol 3-kinase (PI3K)/Akt signaling pathway inhibitor], and
LY294002+I/R. I/R was produced by 30-min coronary occlusion followed by 2-h
reperfusion. At the end of reperfusion, myocardial infarct size and biochemical
changes were compared. Apoptosis was evaluated by both TUNEL staining and
measurement of activated caspase-3 immunoreactivity. The phosphorylation of Akt
and protein expression of Bcl-2 and Bax were determined by Western blotting. Que
postconditioning significantly reduced infarct size and serum levels of creatine
kinase and lactate dehydrogenase compared with the I/R group (all P<0.05).
Apoptotic cardiomyocytes and caspase-3 immunoreactivity were also suppressed in
the Que postconditioning group compared with the I/R group (both P<0.05). Akt
phosphorylation and Bcl-2 expression increased after Que postconditioning, but
Bax expression decreased. These effects were inhibited by LY294002. The data
indicate that Que postconditioning can induce cardioprotection by activating the
PI3K/Akt signaling pathway and modulating the expression of Bcl-2 and Bax
proteins.
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300
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Cao HY, Liu QY, Liu CM, Wang YL, Chen LL, Xiong LH. A 10-connected coordination network based on the planar tetranuclear cobalt cluster building blocks: synthesis, structure, and magnetism. INORG CHEM COMMUN 2013. [DOI: 10.1016/j.inoche.2013.04.037] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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