2876
|
Deng Y, Yang W, Yang X, Yang D. Progress in Iridium-Catalyzed Asymmetric Allylic Substitution Reactions with Allylic Esters. CHINESE J ORG CHEM 2017. [DOI: 10.6023/cjoc201704034] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
2877
|
Xu H, Cheng J, Yang X, Liu Z, Bo X, Li Q. Interplay between the σ-tetrel bond and σ-halogen bond in PhSiF3⋯4-iodopyridine⋯N-base. RSC Adv 2017. [DOI: 10.1039/c7ra02068f] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
2878
|
Zeng G, Yang X, Li J, Yu L, Heng PA, Zheng G. 3D U-net with Multi-level Deep Supervision: Fully Automatic Segmentation of Proximal Femur in 3D MR Images. MACHINE LEARNING IN MEDICAL IMAGING 2017. [DOI: 10.1007/978-3-319-67389-9_32] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
|
2879
|
Hao S, Chen S, Yang X, Wan C. Adverse impact of intermittent portal clamping on long-term postoperative outcomes in hepatocellular carcinoma. Ann R Coll Surg Engl 2017; 99:22-27. [PMID: 27269234 PMCID: PMC5392778 DOI: 10.1308/rcsann.2016.0183] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/11/2016] [Indexed: 01/28/2023] Open
Abstract
Introduction To evaluate the impact of intermittent portal clamping (IPC) on long-term postoperative outcomes in patients with hepatocellular carcinoma (HCC). Methods Clinical records of 355 patients underwent curative liver resection for HCC in January 2007 to December 2010 were retrospectively reviewed. According to how portal clamping was performed, patients were grouped as: IPC, n=113; other portal clamping (OPC), n=190; and no portal clamping (NPC), n=52. Results Median recurrence-free survival (RFS) was statistically significantly shorter in the IPC (39.4 months) than OPC (47.3 months, p=0.010) and NPC groups (51.4 months, p=0.008). Median overall survival (OS) was also significantly shorter with IPC (46.3 months), versus 52.9 months with OPC (p=0.022) and 56.2 months with NPC (p=0.015). Kaplan-Meier survival analysis revealed that 5-year cumulative RFS was much lower in the IPC (42.5%) than OPC (50.9%, p=0.014) and NPC groups (49.6%, p=0.013). Five-year cumulative OS was also much lower in the IPC (44.9%) than OPC (58.0%, p=0.020) and NPC groups (57.7%, p=0.025). On univariate analysis, tumour grade, size and number, TNM stage, blood transfusion, vascular invasion and IPC were significantly inversely correlated with RFS and OS. On multivariate analysis, tumour size and number, blood transfusion, vascular invasion and IPC remained significant. Conclusions Our study suggests that IPC is an independent risk factor for poor long-term postoperative outcomes in patients with HCC.
Collapse
|
2880
|
Xie T, Zhang M, Chen P, Zhao H, Yang X, Yao L, Zhang H, Dong A, Wang J, Wang Z. A facile molecularly imprinted electrochemical sensor based on graphene: application to the selective determination of thiamethoxam in grain. RSC Adv 2017. [DOI: 10.1039/c7ra05167k] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this study, we report a facile method for the preparation of molecularly imprinted polymer based graphene for the electrochemical detection of thiamethoxam residue.
Collapse
|
2881
|
Zhang Y, Yang X, Wu X, Chen S, Feng J. 268 Transurethral Resection of Ejaculatory Ducts Had Less Benefit in the Treatment of Chinese Azoospermic or Severe Oligozoospermic Patients With Polycystic Kidney Disease and Concomitant Seminal Megavesicles. J Sex Med 2017. [DOI: 10.1016/j.jsxm.2016.11.176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
2882
|
Zhang Y, Yang X, Wu X, Chen S, Feng J. 275 Azooaspermia With Unilateral Absence and Contralateral Palpable Scrotal vas Deferens: Clinical Findings and Treatment Options. J Sex Med 2017. [DOI: 10.1016/j.jsxm.2016.11.182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
2883
|
Yang X, Li L, Duan Y, Yang X. Antioxidant activity of JM113 in vitro and its protective effect on broiler chickens challenged with deoxynivalenol. J Anim Sci 2017. [DOI: 10.2527/jas2016.0789] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
2884
|
Hu C, Ni Z, Li BS, Yong X, Yang X, Zhang JW, Zhang D, Qin Y, Jie MM, Dong H, Li S, He F, Yang SM. hTERT promotes the invasion of gastric cancer cells by enhancing FOXO3a ubiquitination and subsequent ITGB1 upregulation. Gut 2017; 66:31-42. [PMID: 26370108 DOI: 10.1136/gutjnl-2015-309322] [Citation(s) in RCA: 88] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Revised: 08/25/2015] [Accepted: 08/26/2015] [Indexed: 12/30/2022]
Abstract
BACKGROUND AND AIMS Human telomerase reverse transcriptase (hTERT) plays an important role in cancer invasion, but the relevant mechanism is not well known. This study aims to investigate the role and mechanism of hTERT in gastric cancer metastasis. DESIGN Proteomics analysis, qPCR and western blotting were used to screen for hTERT-regulated candidate molecules in gastric cancer invasion. Chromatin immunoprecipitation (ChIP) qPCR was performed to identify the binding sites of hTERT at the regulatory region of the integrin β1 (ITGB1) gene. ChIP assays were further applied to elucidate the transcription factors that bound to the regulatory region. The interactions between hTERT and the transcription factors were tested by co-immunoprecipitation (Co-IP) and glutathione S-transferase (GST) pull-down experiments. Moreover, the revealed pathway was verified in tumour-bearing nude mice and human gastric cancer tissues. RESULTS ITGB1 was identified as a downstream gene of hTERT, and there were two hTERT-binding regions within this gene. hTERT alleviated the binding of forkhead box O3 (FOXO3a) to FOXO3a binding element (+9972∼+9978), but it enhanced the binding of forkhead box M1 (FOXM1) to FOXM1 binding element (-1104∼-1109) in ITGB1 gene. Importantly, FOXO3a played a major role in hTERT-induced ITGB1 expression, and the hTERT/murine double minute 2 (MDM2) complex promoted the ubiquitin-mediated degradation of FOXO3a. Moreover, hTERT increased ITGB1 expression in xenograft gastric cancer, and the level of hTERT was positively correlated with that of ITGB1 in human gastric cancer tissues. CONCLUSIONS The hTERT/MDM2-FOXO3a-ITGB1 pathway markedly contributes to hTERT-promoted gastric cancer invasion, suggesting that this pathway might be a novel target for the prevention and treatment of gastric cancer metastasis.
Collapse
|
2885
|
Yang X, Yang W, Deng Y, Yang D. Progress in Transition-Metal Catalyzed Bicyclic Olefins Addition Reaction. CHINESE J ORG CHEM 2017. [DOI: 10.6023/cjoc201604029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
2886
|
Sun W, Yang X, Liu Y, Yuan Y, Lin D. Primary Tumor Location Is a Useful Predictor for Lymph Node Metastasis and Prognosis in Lung Adenocarcinoma. Clin Lung Cancer 2017; 18:e49-e55. [DOI: 10.1016/j.cllc.2016.06.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Revised: 05/31/2016] [Accepted: 06/13/2016] [Indexed: 01/14/2023]
|
2887
|
Zhang M, Zhang H, Zhai X, Yang X, Zhao H, Wang J, Dong A, Wang Z. Application of β-cyclodextrin–reduced graphene oxide nanosheets for enhanced electrochemical sensing of the nitenpyram residue in real samples. NEW J CHEM 2017. [DOI: 10.1039/c6nj02891h] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
2888
|
Ji R, Cheng J, Yang X, Yu J, Li L. Enhanced charge carrier transport in spray-cast organic solar cells using solution processed MoO3 micro arrays. RSC Adv 2017. [DOI: 10.1039/c6ra27647d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A toward all spray fabrication routine was used to fabricate organic solar cells (OSCs), in which a molybdenum oxide (MoO3) micro array was deposited on the active layer. The influence of the hole transporting property on the OSC performance was studied.
Collapse
|
2889
|
Modi A, Ebeling PR, Lee MS, Min YK, Mithal A, Yang X, Baidya S, Sen S, Sajjan S. Impact of gastrointestinal events on patient-reported outcomes in Asia-Pacific women with osteoporosis: baseline results of the MUSIC OS-AP study. Arch Osteoporos 2017; 12:65. [PMID: 28718004 PMCID: PMC5514202 DOI: 10.1007/s11657-017-0350-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 05/21/2017] [Indexed: 02/03/2023]
Abstract
UNLABELLED The purpose of this study was to describe the impact of gastrointestinal events on patient-reported outcomes and health care resource use among Asia-Pacific women with postmenopausal osteoporosis. The results of this study show that gastrointestinal events decreased adherence, treatment satisfaction, and quality of life in Asia-Pacific women with postmenopausal osteoporosis. PURPOSE This study aimed to describe the impact of gastrointestinal (GI) events on patient-reported outcomes and health care resource use among Asia-Pacific women with postmenopausal osteoporosis. METHODS The MUSIC OS-AP study included an observational cohort study of postmenopausal women with osteoporosis. Women were classified as untreated or treated, with treated patients further classified as new or experienced users. Adherence was measured by the Adherence Evaluation of Osteoporosis treatment (ADEOS) questionnaire, treatment satisfaction by the Osteoporosis Patient Satisfaction Questionnaire (OPSAT) while general health-related and osteoporosis-specific quality of life were measured by the European Quality of Life-5 Dimensions (EQ-5D) questionnaire and the Osteoporosis Assessment Questionnaire (OPAQ), respectively. The association of GI events with these outcomes was determined by covariate-adjusted regression analysis of least squares mean differences in the scores of treated patients with and without GI events. Resource utilization was measured as the number of physician visits over the past 3 months, and multivariate regression analysis was used to assess the association of GI events with the likelihood of a visit. RESULTS The GI event profile, quality of life scores, and resource use were numerically similar in untreated and treated women. The rate of adherence among treated women was higher in experienced than in new users. As indicated by mean scores, experienced users had better quality of life and slightly higher treatment satisfaction and fewer physician visits than new users. Except for adherence in new users, all measures were similarly adversely affected by GI events in both new and experienced users. CONCLUSIONS GI events decreased adherence, treatment satisfaction, and quality of life in Asia-Pacific women with postmenopausal osteoporosis.
Collapse
|
2890
|
Feng J, Zhang Y, Wu X, Chen S, Yang X, Zhang Y. 374 Homozygous 5T Alleles, Clinical Presentation and Genetic Analysis Within a Family With Congenital Bilateral Absence of the Vas Deferens(CBAVD). J Sex Med 2017. [DOI: 10.1016/j.jsxm.2016.11.254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
2891
|
Chen Y, Zhang Y, Wang L, Yang X. A case of melanocytic cervical adenosquamous carcinoma complicated with Cushing's syndrome. EUR J GYNAECOL ONCOL 2017; 38:126-128. [PMID: 29767880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
BACKGROUND To date, cervical carcinoma complicated with Cushing's syndrome were all diagnosed as small cell carcinoma histo- logically, but not adenosquamous carcinoma. Here the authors present the diagnosis, management, and prognosis of a case of melanocytic cervical adenosquamous carcinoma complicated with Cushing's syndrome. CASE A 28-year-old woman was admitted with the chief complaint of post-coital bleeding for one month. Gynecological examination revealed a nodular yellowish-pigmented vegetation (6x5 cm) on the cervix. Laboratory findings proved the diagnosis of Cushing's syndrome. Histopathological diagnosis showed the adenosquamous carcinoma with melanoma differentiation. Immunohistochemical stainings for melanoma A and anti- adrenocorticotropic hormone (ACTH) were positive in the majority of the tumor cells, which indicated that this melanocytic cervical carcinoma lesion was the source of ectopic ACTH production resulting in Cushing's syndrome. CONCLUSION This is a unique case of a rare type of cervical carcinoma.
Collapse
|
2892
|
Pangeni D, Jendza JA, Menon DR, Anil L, Yang X, Baidoo SK. Effect of replacing conventional soybean meal with low oligosaccharide soybean meal fed to weanling piglets. J Anim Sci 2017; 95:320-326. [PMID: 28177392 DOI: 10.2527/jas.2016.0780] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
An experiment was conducted to investigate the effect of replacing conventional soybean meal (CSBM) with low-oligosaccharide soybean meal (LOSBM) on growth performance, blood urea nitrogen (BUN), intestinal morphology, viscosity of the intestinal contents, and visceral organ weight of weanling pigs. Thirty-two 19-d old individually housed pigs (6.2 ± 0.4 kg BW) were blocked by BW, and randomly assigned from within blocks to 1 of 4 dietary treatments: (1) CSBM with inclusion of fish meal and spray dried plasma protein (CSBM+), (2) CSBM without inclusion of fish meal and spray dried plasma protein (CSBM-), (3) LOSBM with inclusion of fish meal and spray dried plasma protein (LOSBM+), and (4) LOSBM without inclusion of fish meal and spray dried plasma protein (LOSBM-) according to a 2 × 2 factorial arrangement. Pigs were fed the experimental diets ad libitum for 14 d. Average daily gain and ADFI were not affected ( > 0.05) by the dietary treatments. However, inclusion of fish meal and spray dried plasma protein improved ( = 0.04) the gain to feed ratio. Replacing CSBM with LOSBM reduced ( = 0.01) viscosity of the intestinal contents. Dietary treatments had no effect ( > 0.05) on the small intestinal length and weights of organs including the pancreas, liver, heart, kidney, and spleen. No differences ( > 0.05) were observed between dietary treatments in villus height, crypt depth, and the ratio of villus height to crypt depth in the ileum, and crypt depth and the ratio of villus height to crypt depth in the jejunum; however, jejunal villus height was reduced ( = 0.02) when replacing CSBM with LOSBM. Concentration of BUN was higher ( = 0.01) for pigs fed the LOSBM diets compared with pigs fed the diets containing CSBM. In conclusion, LOSBM reduced the intestinal digesta viscosity but had no effects on growth performance and intestinal morphology when fed to piglets during the first 2 wk after weaning.
Collapse
|
2893
|
Yang X, Gvetadze SR, Mingming L, Wang J, Li J. Concomitant Pulmonary Embolism and Acute Renal Failure in a Patient Undergoing Head Neck Surgery: A Case Report and Review of Literature. J Clin Diagn Res 2017. [DOI: 10.7860/jcdr/2017/30254.10979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
2894
|
Kronawitter CX, Chen Z, Zhao P, Yang X, Koel BE. Electrocatalytic hydrogenation of pyridinium enabled by surface proton transfer reactions. Catal Sci Technol 2017. [DOI: 10.1039/c6cy02487d] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
It is observed for the first time that pyridinium is hydrogenated at Pt electrodes in electrochemical conditions consistent with those previously shown to yield selective reduction of carbon dioxide to methanol and formic acid.
Collapse
|
2895
|
Pangeni D, Jendza JA, Anil L, Yang X, Baidoo SK. Effect of replacing conventional soybean meal with low-oligosaccharide soybean meal on growth performance and carcass characteristics of wean-to-finish pigs. J Anim Sci 2017. [DOI: 10.2527/jas2016.1164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
2896
|
Xu X, Pan L, Zhuo M, Yang X, Zhang W, Sun D, Zeng N, Zhang D. Increased expression of LncRNA BANCR and its prognostic significance in human epithelial ovarian cancer. EUR J GYNAECOL ONCOL 2017; 38:449-452. [PMID: 29693889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
PURPOSE Long non-coding RNAs (lncRNAs) have been proved to play important roles in the tumorigenesis and development of human epithelial ovarian cancer (EOC). The aim of the present study was to investigate the expression and clinical value of BRAF-activated non-coding RINA (BANCR) in EOC patients. MATERIALS AND METHODS BANCR expression was detected in 84 EOC and 36 normal ovarian epithelial tissue samples. Association between BANCR levels and clinicopathological factors and patient prognosis was also analyzed. RESULTS BANCR expression was increased in EOC compared with normal ovarian epithelial tissues. Moreover, high expression of BANCR was closely correlated with advanced FIGO stage, higher serum, CAI125 expression level, and lymph node metastasis. Multivariate regression analysis identified BANCR overexpression as an independent unfavorable prognostic factor in EOC patients. CONCLUSIONS These findings suggested that BANCR may act as a tumor promoter in EOC and would be a novel diagnostic and prognostic marker for this disease.
Collapse
|
2897
|
Wang H, Li Z, Yang X, Zhou L, Lin D. P2.01-053 PD-L1 Expression in Patients with Small Cell Lung Cancer. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2016.11.1105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
2898
|
Wang H, Leng J, Li W, Wang L, Zhang C, Li W, Liu H, Zhang S, Chan J, Hu G, Yu Z, Yang X. Sleep duration and quality, and risk of gestational diabetes mellitus in pregnant Chinese women. Diabet Med 2017; 34:44-50. [PMID: 27154471 DOI: 10.1111/dme.13155] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/03/2016] [Indexed: 01/05/2023]
Abstract
AIMS To examine the association between sleep disturbances during pregnancy and risk of gestational diabetes mellitus. METHODS From 2010 to 2012, 12 506 women in Tianjin, China, were screened using a 50-g 1-h glucose challenge test at 24-28 weeks' gestation. Those with glucose challenge test values of ≥ 7.8 mmol/l were invited to further undergo a 75-g 2-h oral glucose tolerance test. Gestational diabetes was determined according to the International Association of Diabetes and Pregnancy Study Group's definition. Self-reported sleep duration and sleep quality during pregnancy was documented using a modified questionnaire. Logistic regression was used to obtain odds ratios and 95% CIs. RESULTS A total of 919 women (7.3%) had gestational diabetes. Sleep duration was found to have an approximate J-shaped association with gestational diabetes risk after adjusting for covariates. Compared with a sleep duration of 7-9 h/day (43% of 12 506 women), the adjusted odds ratios for sleep duration of ≥ 9 h/day (55%) and < 7 h/day (2%) for gestational diabetes were 1.21 (95% CI 1.03-1.42) and 1.36 (95% CI 0.87-2.14), respectively. Compared with good sleep quality (37.9% of 12 506 women), the adjusted odds ratios of moderate (59.9%) and poor sleep quality (2.2%) for gestational diabetes were 1.19 (95% CI 1.01-1.41) and 1.61 (95% CI 1.04-2.50), respectively. CONCLUSION In pregnant Chinese women, poor sleep quality, and shorter and longer duration of sleep during pregnancy were independently associated with an increased risk of gestational diabetes.
Collapse
|
2899
|
Beiyuan J, Tsang DCW, Valix M, Zhang W, Yang X, Ok YS, Li XD. Selective dissolution followed by EDDS washing of an e-waste contaminated soil: Extraction efficiency, fate of residual metals, and impact on soil environment. CHEMOSPHERE 2017; 166:489-496. [PMID: 27710884 DOI: 10.1016/j.chemosphere.2016.09.110] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2016] [Revised: 09/22/2016] [Accepted: 09/23/2016] [Indexed: 06/06/2023]
Abstract
To enhance extraction of strongly bound metals from oxide minerals and organic matter, this study examined the sequential use of reductants, oxidants, alkaline solvents and organic acids followed by a biodegradable chelating agent (EDDS, [S,S]-ethylene-diamine-disuccinic-acid) in a two-stage soil washing. The soil was contaminated by Cu, Zn, and Pb at an e-waste recycling site in Qingyuan city, China. In addition to extraction efficiency, this study also examined the fate of residual metals (e.g., leachability, bioaccessibility, and distribution) and the soil quality parameters (i.e., cytotoxicity, enzyme activities, and available nutrients). The reductants (dithionite-citrate-bicarbonate and hydroxylamine hydrochloride) effectively extracted metals by mineral dissolution, but elevated the leachability and bioaccessibility of metals due to the transformation from Fe/Mn oxides to labile fractions. Subsequent EDDS washing was found necessary to mitigate the residual risks. In comparison, prior washing by oxidants (persulphate, hypochlorite, and hydrogen peroxide) was marginally useful because of limited amount of soil organic matter. Prior washing by alkaline solvents (sodium hydroxide and sodium bicarbonate) was also ineffective due to metal precipitation. In contrast, prior washing by low-molecular-weight organic acids (citrate and oxalate) improved the extraction efficiency. Compared to hydroxylamine hydrochloride, citrate and oxalate induced lower cytotoxicity (Microtox) and allowed higher enzyme activities (dehydrogenase, acid phosphatase, and urease) and soil nutrients (available nitrogen and phosphorus), which would facilitate reuse of the treated soil. Therefore, while sequential washing proved to enhance extraction efficacy, the selection of chemical agents besides EDDS should also include the consideration of effects on metal leachability/bioaccessibility and soil quality.
Collapse
|
2900
|
Zhang Y, He Q, Yang X, Wu X, Chen S, Feng J. 386 Proteomic Analysis of Rat Testis in Experimental Varicocoele and the Function of Heterogeneous Nuclear Ribonucleoprotein F in Germ Cell Apoptosis. J Sex Med 2017. [DOI: 10.1016/j.jsxm.2016.11.266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|