Publications by authors named "Yu-Long Liu"

21 Publications

  • Page 1 of 1

Cobalt (II) complex as a fluorescent sensing platform for the selective and sensitive detection of triketone HPPD inhibitors.

J Hazard Mater 2021 02 18;404(Pt A):124015. Epub 2020 Sep 18.

Department of Applied Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin, 150030, People's Republic of China. Electronic address:

4-Hydroxyphenylpyruvatedioxygenase (HPPD) is a Fe(II)/Co(II)-dependent enzyme which has become one of the most effective herbicide targets. HPPD inhibitors have been developed as efficient herbicides for resistant weed control. Developing a method for efficient and rapid HPPD inhibitors detection is still challenging. N-n-butyl-4-methylhydrazinecarbothioamide-1,8-naphthalimide (NMN) was synthesized and used to detect Co efficiently with the limit of detection (LOD) of 7.82 nM with a turn-on fluorescence. Herein a novel fluorescent complex, NMN‒Co was employed to determine HPPD inhibitors which performed a turn-off effect in the sensing process based on the competitive coordination between the probe and HPPD with Co. The LODs for three commercial triketone HPPD inhibitors (mesotrione, tembotrione and NTBC) were 6.60 nM, 7.37 nM and 10.22 nM with good sensitivity and selectivity. Furthermore, the present probe has potentials to quantitatively detect mesotrione and tembotrione in real samples.
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http://dx.doi.org/10.1016/j.jhazmat.2020.124015DOI Listing
February 2021

A Highly Selective Perylenediimide-Based Chemosensor: "Naked-Eye" Colorimetric and Fluorescent Turn-On Recognition for Al.

Front Chem 2020 11;8:702. Epub 2020 Sep 11.

Department of Applied Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin, China.

A novel "turn-on" fluorescent probe () was designed, synthesized, and characterized with perylene tetracarboxylic disimide as the fluorophore and Schiff base subunit as the metal ion receptor. The probe demonstrated a considerable fluorescence enhancement in the presence of Al in DMF with high selectivity and sensitivity. Furthermore, the considerably "off-on" fluorescence response simultaneously led to the apparent color change from colorless to brilliant yellow, which could also be identified by naked eye easily. The sensing capability of to Al was evaluated by the changes in ultraviolet-visible, fluorescence, Fourier transform-infrared, proton nuclear magnetic resonance, and high-resolution mass spectrometry spectroscopies. The linear concentration range for Al was 0-63 μM with a detection limit of 0.16 μM, which allowed for the quantitative determination of Al.
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http://dx.doi.org/10.3389/fchem.2020.00702DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7516037PMC
September 2020

Tritiated Water Induces Toxicity in Human Umbilical Vein Vascular Endothelial Cells via IL8.

Dose Response 2020 Jul-Sep;18(3):1559325820938541. Epub 2020 Jul 7.

State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Soochow University, Suzhou, People's Republic of China.

We aimed to determine the toxic effects of tritiated water (HTO) on 12 generations (T1-T12) of human umbilical vein vascular endothelial cells (HUVECs) and elucidate the underlying mechanisms. We evaluated cellular senescence, interleukin (IL) 8 concentrations, and angiogenesis using β-galactosidase staining, enzyme-linked immunosorbent assay, and in vitro assays, respectively. The adhesion properties of contaminated cells and differentially expressed genes were assessed using the xCELLigence RTCA SP system and gene chip analysis, respectively. We found that long-term exposure to low levels of HTO can reduce the adhesion of HUVECs to the cellular matrix as well as their angiogenic capacity, while increasing their permeability, senescence, and adhesion to monocytes. Interleukin 8 activated the p38 and Epidermal Growth Factor Receptor (EGFR) pathways in HTO-treated cells and hence was identified as a key candidate of biomarker. The present study clarified the toxicity of HTO in vascular endothelial cells and identified IL8 as a novel protective target with important theoretical and practical values.
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http://dx.doi.org/10.1177/1559325820938541DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7343372PMC
July 2020

Monitoring of Tritium Internal Exposure Doses of Heavy-Water Reactor Workers in Third Qinshan Nuclear Power Plant.

Dose Response 2019 Oct-Dec;17(4):1559325819890498. Epub 2019 Nov 22.

Department of Oncology, The Second Affiliated Hospital of Suzhou University, Suzhou, China.

To analyze the tritium internal exposure dose of workers in the Third Qinshan Nuclear Power Plant over the past 15 years. Urine samples provided by workers are tested directly to analyze the tritium concentrations and estimate internal exposure dose. Since 2004, an average of approximately 1600 workers have been monitored annually, with an average annual monitoring frequency of approximately 11 000. Since 2004, the average annual collective dose of tritium internal exposure was 149.62 person·mSv, accounting for 19.07% of the total annual collective dose. A total of 18 workers' annual individual internal tritium radiation doses exceeded 2 mSv, of which 5 workers' internal tritium radiation doses in a single intake exceeded 2 mSv. The occupational population with the largest total internal tritium radiation doses consists of maintenance personnel, fuel operators, and radiation protection personnel, whose collective doses of internal exposure account for 75.51% of the total collective doses within the plant. Over 15 years of operation, the internal tritium radiation doses of workers in the Third Qinshan Nuclear Power Plant have been strictly controlled within the national regulatory limit and power plant management target, ensuring the health and safety of the workers.
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http://dx.doi.org/10.1177/1559325819890498DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6876181PMC
November 2019

A novel colorimetric and "turn-off" fluorescent probe based on catalyzed hydrolysis reaction for detection of Cu in real water and in living cells.

Spectrochim Acta A Mol Biomol Spectrosc 2020 Feb 23;227:117540. Epub 2019 Oct 23.

Department of Applied Chemistry, College of Science, Northeast Agricultural University, Harbin, 150030, PR China. Electronic address:

A novel and highly selective fluorescent 1,8-naphthalimide-based probe, 3, was designed and synthesized for rapid Cu detection in a CHCN-HO (3:1, v/v, pH = 7.4) solution by means of a distinct hydrolysis mechanism via its Cu-promoting feature. Upon treatment with Cu, the fluorescence response of probe 3 at 550 nm abruptly decreased, which was visible to the naked eye, and this response was accompanied by a clear change of the color of the solution; the color changed from the original yellow color to colorless. This color change occurred due to the Cu-promoted hydrolysis of 3, which yielded a fluorescence-quenched product. It is inspiring that probe 3 exhibited excellent sensitivity, a short response time and strong anti-interference recognition. Compared with the allowable amount of Cu (∼20 μM) in drinking water, the detection limit of 3 for Cu is calculated to be 9.15 nM, which is much lower than the amount defined by standards. The probe can be successfully applied for the determination of Cu in real aqueous samples. Furthermore, probe 3 can be used as a fluorescent sensor to detect Cu in biological environments, demonstrating its low toxicity to organisms and good cell permeability in live cell imaging.
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http://dx.doi.org/10.1016/j.saa.2019.117540DOI Listing
February 2020

Development of Teleost Intermuscular Bones Undergoing Intramembranous Ossification Based on Histological-Transcriptomic-Proteomic Data.

Int J Mol Sci 2019 Sep 22;20(19). Epub 2019 Sep 22.

Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education/Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China.

Intermuscular bones (IBs) specially exist in lower teleost fish and the molecular mechanism for its development remains to be clarified. In this study, different staining methods and comparative proteomics were conducted to investigate the histological structure and proteome of IB development in , including four key IB developmental stages (S1-IBs have not emerged in the tail part; S2-several small IBs started to ossify in the tail part; S3-IBs appeared rapidly; S4-all the IBs appeared with mature morphology). Alcian blue and alizarin red S stained results indicated that IBs were gradually formed from S2 to S4, undergoing intramembranous ossification without a cartilaginous phase. A total of 3368 proteins were identified by using the isobaric tags for relative and absolute quantitation (iTRAQ) approach. Functional annotation showed that proteins which were differentially expressed among stages were involved in calcium, MAPK, Wnt, TGF-β, and osteoclast pathways which played a critical role in bone formation and differentiation. Three proteins (collagen9α1, stat1, tnc) associated with chondrocytes did not exhibit significant changes through S2 to S4; however, proteins (entpd5, casq1a, pvalb, anxa2a, anxa5) which associated with osteoblasts and bone formation and differentiation showed significantly a higher expression level from S1 to S2, as well as to S3 and S4. These further demonstrated that development of IBs did not go through a cartilaginous phase. The inhibitors of TGF-β and Wnt pathways were tested on zebrafish (sp7/eGFP) and the results indicated that both inhibitors significantly delayed IB development. This study provides a comprehensive understanding of the IB ossification pattern, which will help further elucidate the molecular mechanisms for IB development in teleosts.
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http://dx.doi.org/10.3390/ijms20194698DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6801895PMC
September 2019

A New Fluorescent Chemosensor for Cobalt(II) Ions in Living Cells Based on 1,8-Naphthalimide.

Molecules 2019 Aug 26;24(17). Epub 2019 Aug 26.

Department of Applied Chemistry, College of Science, Northeast Agricultural University, Harbin 150030, China.

In this work, a highly selective fluorescent chemosensor -(2-(2--1,3-dioxo-2,3-dihydro-1-benzo[]isoquinolin-6-yl)hydrazine-1-carbonothioyl)benzamide () was prepared and characterized. An assay to detect the presence of cobalt(II) ions was developed by utilizing turn-on fluorescence enhancement with visual colorimetric response. Upon treatment with Co, a remarkable fluorescence enhancement located at 450 nm was visible to naked eyes accompanied with a distinct color change (from pink to colorless) in a CHCN/HEPES (4/1, /, pH = 7.4) solution due to the formation of a 1:1 complex at room temperature. In addition, the linear concentration range for Co was 0-25 µM with the limit of detection down to 0.26 µM. Thus, a highly sensitive fluorescent method based on chelation-assisted fluorescence enhancement was developed for the trace-level detection of Co. The sensor was found to be highly selective toward Co ions with a large number of coexisting ions. Furthermore, the probe can serve as a fluorescent sensor for Co detecting in biological environments, demonstrating its low toxic properties to organisms and good cell permeability in live cell imaging.
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http://dx.doi.org/10.3390/molecules24173093DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6749574PMC
August 2019

Two luminescent [email protected] systems as dual-emitting platforms for efficient pesticides detection.

J Hazard Mater 2020 01 5;381:120966. Epub 2019 Aug 5.

Department of Applied Chemistry, College of Science, Northeast Agricultural University, Harbin, 150030, People's Republic of China. Electronic address:

Pesticides, which can accumulate in soil, water, animals and plants, are essential to world agriculture. Developing a method that can efficiently and quickly detect toxic pesticides is of importance but still a challenge. Here, two luminescent [email protected] systems, Rho [email protected] and Rho [email protected], were successfully fabricated based on [Cd(tib)(btb)(HO)]∙NO∙2DMF (1). This work is the first use of two fluorescent sensors as dual-emitting platforms for detecting pesticides. As a result, the fluorescence intensity ratios between the two main emissions can be tuned using the concentrations of the dye solutions, and the emissions are at 370 nm/606 nm and 370 nm/590 nm for Rho [email protected] and Rho [email protected], respectively. The intensities of the two main emissions of Rho [email protected] and Rho [email protected] are also influenced by the chemical structures of pesticides with electron-withdrawing groups. It is important that high sensitivity and selectivity for sensing pesticides must have good recyclability. Rho [email protected] and Rho [email protected] can still remain stable regarding the detection of nitenpyram even after 5 cycles, with LODs of 0.48 nM for Rho [email protected] and 3 nM for Rho [email protected], which indicate that these two luminescent [email protected] systems are excellent fluorescence probe candidates for the selective detection of pesticides.
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http://dx.doi.org/10.1016/j.jhazmat.2019.120966DOI Listing
January 2020

Synthesis and Configurational Character Study of Novel Structural Isomers Based on Pyrene-Imidazole.

Molecules 2019 Jun 20;24(12). Epub 2019 Jun 20.

Department of Applied Chemistry, College of Science, Northeast Agricultural University, Harbin 150030, China.

Isomers provide more possibilities for the structure of organic compounds. Molecular structures determine their corresponding properties, therefore the intrinsic relationship between structure and properties of isomers is of great research value. Isomers with a stable structure and excellent performance possess more potential for development and application. In this paper, we design and synthesize structural isomers with different molecular symmetries based on the asymmetric structure of imidazole and the symmetrical structure of pyrene. Isomers with stable molecular structures can be obtained by a simple and efficient "one-pot" reaction, involving axisymmetric configuration and centrosymmetric configuration. Using this "click-like" reaction, the structure of target molecules is controllable and adjustable. Furthermore, the effect of molecular configurations on molecular stacking of crystal is studied. The variation of the optical and thermal properties, the optimized structures, and orbital distributions of isomers depends on different molecular geometry with different symmetry, which are revealed by crystallographic analysis. This present strategy provides an efficient synthetic method for the design and synthesis of structural isomers based on pyrene-imidazole.
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http://dx.doi.org/10.3390/molecules24122293DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6630678PMC
June 2019

A lysosome-targetable fluorescent probe for imaging trivalent cations Fe, Al and Cr in living cells.

Spectrochim Acta A Mol Biomol Spectrosc 2019 Nov 7;222:117242. Epub 2019 Jun 7.

Department of Applied Chemistry, College of Science, Northeast Agricultural University, Harbin 150030, PR China; College of Life Science, Northeast Agricultural University, Harbin 150030, PR China. Electronic address:

An effective morpholine-type naphthalimide chemsensor, N-p-chlorophenyl-4-(2-aminoethyl)morpholine-1,8-naphthalimide (CMN) has been developed as a lysosome-targeted fluorometric sensor for trivalent metal ions (Fe, Al and Cr). Upon the addition of Fe, Al or Cr ions, the probe CMN showed an evident naked-eye color changes which pale yellow solution of CMN turned deepened and it displayed turn-on fluorescence response in methanol. CMN showed a significant selective and sensitive toward Fe, Al or Cr ions, while there was no obvious behavior to other monovalent or divalent metal ions from the UV-vis and fluorescence spectrum. Based on the Job's plot analyses the 1:1 coordination mode of CMN with Fe, Al or Cr was proposed. The limit of detection (LOD) observed were 0.65, 0.69 and 0.68 μM for Fe, Al and Cr ions, respectively. The N-atom of morpholine directly involved in complex formation, CMN emitted fluorescence through inhibition of photoinduced electron transfer (PET). This probe exhibited excellent imaging ability for Fe, Aland Cr ions in living cells with low cytotoxicity. Significantly, the cellular confocal microscopic research indicated that the lysosome-targeted group of morpholine moiety was introduced which realized the capability of imaging lysosomal trivalent metal ions in living cells for the first time.
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http://dx.doi.org/10.1016/j.saa.2019.117242DOI Listing
November 2019

Research of Biological Dose Conversion Platform Based on a Modified Linear Quadratic Model.

Dose Response 2019 Jan-Mar;17(1):1559325819828623. Epub 2019 Mar 28.

Department of Radiation Oncology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, People's Republic of China.

The study aimed to develop a novel dose conversion platform by improving linear-quadratic (LQ) model to more accurately describe radiation response for high fraction/acute doses. This article modified the LQ model via piecewise fitting the biological dose curve using different fractionated dose and optimizing the consistency between mathematical model and experimental data to gain a more reasonable transform. That mathematical development of the LQ model further amended certain deviations of various cell curves with high doses and implied the rationality of the present model at low dose range. The modified biologically effective dose model that solved the dilemma of inaccurate LQ model had been used in comparing between hypofractionated and conventional fractioned dose. It has been verified that the calculated values are similar in the treatment of same efficacy, no matter what α/β is, and provided a more rational explanation for significant differences among various hypofractionations. The equivalent uniform dose based on the subsection function could represent arbitrary inhomogeneous dose distributions including high-dose fractions, providing a foundation for the implementation of detailed evaluation of different cell dose effects.
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http://dx.doi.org/10.1177/1559325819828623DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6440057PMC
March 2019

Successful Rescue of the Victim Exposed to a Super High Dose of Iridium-192 during the Nanjing Radiological Accident in 2014.

Radiat Res 2019 06 29;191(6):527-531. Epub 2019 Mar 29.

Departments of Nuclear and Radiation Incident Medical Emergency Office.

Here we report on the interventions taken to treat a patient exposed to high-dose radiation and provide a protocol for treating such patients in the future. The patient, Mr. Wang, was a 58-year-old male janitor who was accidentally exposed to a Ir source with an activity of 966.4 GBq or 26.1 Ci. The dose estimated to the lower right limb was 4,100 Gy, whereas the whole-body effective dose was 1.51 Gy. The diagnosis was made according to the results of the patient dose estimation and clinical manifestations. Systemic treatment included stimulating bone marrow hematopoietic cells, enhancing immunity, anti-infection and vitamin supplements. The treatment of radiation-induced skin lesions consisted of several debridements, two skin-flap transplantations and application of mesenchymal stem cells (MSCs). Skin-flap transplantations and MSCs play important roles in the recovery of skin wound. A combination of antibiotics and antimycotic was useful in reducing inflammation. The application of vacuum sealing drainage was effective in removing necrotic tissue and bacteria, ameliorating ischemia and hypoxia of wound tissue, providing a fresh wound bed for wound healing and improving skin or flap graft survival rates. The victim survived the accident without amputation, and function of his highly exposed right leg was partially recovered. These results demonstrate the importance of collaboration among members of a multidisciplinary team in the treatment of this patient.
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http://dx.doi.org/10.1667/RR15274.1DOI Listing
June 2019

Evolution of Fish Let-7 MicroRNAs and Their Expression Correlated to Growth Development in Blunt Snout Bream.

Int J Mol Sci 2017 Mar 16;18(3). Epub 2017 Mar 16.

College of Fisheries, Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education/Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China.

The lethal-7 () miRNA, known as one of the first founding miRNAs, is present in multiple copies in a genome and has diverse functions in animals. In this study, comparative genomic analysis of miRNAs members in fish species indicated that miRNA is a sequence conserved family in fish, while different species have the variable gene copy numbers. Among the ten members including let-7a/b/c/d/e/f/g/h/i/j, the let-7a precursor sequence was more similar to ancestral sequences, whereas other miRNA members were separate from the late differentiation of let-7a. The mostly predicted target genes of miRNAs are involved in biological process, especially developmental process and growth through Gene Ontology (GO) enrichment analysis. In order to identify the possible different functions of these ten miRNAs in fish growth development, their expression levels were quantified in adult males and females of , as well as in 3-, 6-, and 12-months-old individuals with relatively slow- and fast-growth rates. These ten miRNAs had similar tissue expression patterns between males and females, with higher expression levels in the brain and pituitary than that in other tissues ( < 0.05). Among these miRNAs, the relative expression level of was the highest among almost all the tested tissues, followed by , and . As to the groups with different growth rates, the expression levels of miRNAs in pituitary and brain from the slow-growth group were always significantly higher than that in the fast-growth group ( < 0.05). These results suggest that miRNA members could play an important role in the regulation of growth development in through negatively regulating expression of their target genes.
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http://dx.doi.org/10.3390/ijms18030646DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5372658PMC
March 2017

Gelsolin: role of a functional protein in mitigating radiation injury.

Cell Biochem Biophys 2015 Jan;71(1):389-96

Division of Radiation Medicine Department of Naval Medicine, Second Military Medical University, Shanghai, China.

The present study was conducted to explore the protective effect of exogenous gelsolin (GSN) in mice exposed to high-dose of radiation. Changes in the levels of GSNs in peripheral blood of mice and cytoplasm of cultured human intestinal epithelial cells (HIECs) were analyzed after their exposure to different doses of (137)Cs γ-rays at a fixed dose rate. The coagulation associated indices, such as prothrombin time (PT) and activated partial thromboplastin time (APTT) were measured. Effect on radiation-mediated oxidative damage was evaluated by estimating the altered glutathione (GSH) and malondialdehyde (MDA) concentrations in the blood. The results showed that radiation induced a pronounced decrease in the pGSN blood levels. However, the cGSN levels of irradiated HIECs were increased in a dose-dependent manner. Administration of recombinant human pGSN to irradiated mice resulted in an ameliorated clotting time as indicated by the PT and the APTT indices. The treatment of mice with hpGSN enhanced the blood levels of GSH while MDA concentrations were decreased indicating an improved antioxidant status. These results suggest that GSNs might play a regulatory role in the suppression of the tissue damage induced by acute radiation exposure.
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http://dx.doi.org/10.1007/s12013-014-0210-3DOI Listing
January 2015

Mitochondria DNA 4977 bp common deletion in peripheral whole blood from healthy donors.

Biomed Environ Sci 2013 Dec;26(12):990-3

Henan Institute of Occupational Medicine, Zhengzhou 450052, Henan, China.

To investigate the distribution of mitochondria DNA 4 977 bp deletion, a common deletion (CD), in normal populations of Chinese, human peripheral blood samples from sixty healthy donors were collected, and levels of the CD in genomic DNA from the samples were detected using real-time PCR. The results showed that the CD was found in 27 health donors, with its positive rate being 45% (27/60). The CD ratio was between 0 and 0.00308%, and not affected by age and gender in sixty healthy donors. Our studies indicate that the CD ratio is low, and do not show the age-dependent accumulation and any gender difference in peripheral whole blood from the normal Chinese population.
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http://dx.doi.org/10.3967/bes2013.035DOI Listing
December 2013

Screening of plant species for phytoremediation of uranium, thorium, barium, nickel, strontium and lead contaminated soils from a uranium mill tailings repository in South China.

Bull Environ Contam Toxicol 2011 Jun 27;86(6):646-52. Epub 2011 Apr 27.

Key Discipline Laboratory for National Defense for Biology Technology in Uranium Mining and Hydrometallurgy, University of South China, 421001 Hengyang, Hunan, People's Republic of China.

The concentrations of uranium, thorium, barium, nickel, strontium and lead in the samples of the tailings and plant species collected from a uranium mill tailings repository in South China were analyzed. Then, the removal capability of a plant for a target element was assessed. It was found that Phragmites australis had the greatest removal capabilities for uranium (820 μg), thorium (103 μg) and lead (1,870 μg). Miscanthus floridulus had the greatest removal capabilities for barium (3,730 μg) and nickel (667 μg), and Parthenocissus quinquefolia had the greatest removal capability for strontium (3,920 μg). In this study, a novel coefficient, termed as phytoremediation factor (PF), was proposed, for the first time, to assess the potential of a plant to be used in phytoremediation of a target element contaminated soil. Phragmites australis has the highest PFs for uranium (16.6), thorium (8.68), barium (10.0) and lead (10.5). Miscanthus floridulus has the highest PF for Ni (25.0). Broussonetia papyrifera and Parthenocissus quinquefolia have the relatively high PFs for strontium (28.1 and 25.4, respectively). On the basis of the definition for a hyperaccumulator, only Cyperus iria and Parthenocissus quinquefolia satisfied the criteria for hyperaccumulator of uranium (36.4 μg/g) and strontium (190 μg/g), and could be the candidates for phytoremediation of uranium and strontium contaminated soils. The results show that the PF has advantage over the hyperaccumulator in reflecting the removal capabilities of a plant for a target element, and is more adequate for assessing the potential of a plant to be used in phytoremediation than conventional method.
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http://dx.doi.org/10.1007/s00128-011-0291-2DOI Listing
June 2011

[Effects of benzene, toluene on reductive dechlorination of trichloroethylene and its daughter product cis-1,2-dichloroethylene by granular iron].

Huan Jing Ke Xue 2010 Jul;31(7):1526-32

Beijing Key Laboratory of Water Resources and Environmental Engineering, China University of Geosciences (Beijing), Beijing 100083, China.

Mixed plumes contained chlorinated solvents and petroleum hydrocarbons which mainly refers to BTEX (benzene, toluene, ethylbenzene and xylenes) in groundwater can be remediated by sequential units combined an iron permeable reactive barrier (Fe0-PRB) with an anoxic wall. In design of the Fe0-PRB it should be taken into account the necessity of altering the width of the iron cell in the presence of BTEX. Three column experiments were conducted to evaluate the effects of benzene, toluene on the long-term performance of reductive dechlorination of trichloroethylene (TCE) by granular iron. The results showed that the kinetics of TCE (at the initial concentration of 2 mg x L(-1) more or less) reduction was accorded with pseudo first-order even in the presence of benzene or toluene (at about 1-2 mg x L(-1), respectively). The existence of benzene and toluene inhibited the removal of TCE by 15.1% and 18. 5% , respectively; however, the presence of benzene slightly increased cis-1,2-DCE reduction rate by 4.5%, and the presence of toluene increased cis-1,2-DCE reduction rate by 42.8%. The inhibition of benzene and toluene other than mineral precipitates was not one of the decisive factors in the long-term performance of an Feo-PRB; in addition, the kinds of chlorinated daughter products of TCE in the presence/absence of benzene or toluene were identical and cis-1,2-dichloroethylene (cis-1,2-DCE), the major intermediate, firstly broke through from all the 3 columns at concentrations about 2-75 microg x L(-1), indicating that designing the width of an Fe0-PRB should be based on the hydraulic residence time of cis-1,2-DCE. In conclusion, if only considering the TCE remedial goals and disregarding the effects of cis-1,2-DCE on BTEX biodegradation downgradient the Fe0-PRB, the results suggested that it should be not necessary to increase the width of the iron cell for constructing sequential permeable reactive barriers (SPRBs) to rescue TCE- and BTEX-contaminated aquifers.
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July 2010

Metal pollution in Huayuan River in Hunan Province in China by manganese sulphate waste residue.

Bull Environ Contam Toxicol 2009 Oct 1;83(4):583-90. Epub 2009 Jul 1.

Key Discipline Laboratory for National Defense for Biology Technology in Uranium Mining and Hydrometallurgy, University of South China, 421001 Hengyang, Hunan, People's Republic of China.

The Huayuan River in Hunan Province in China is subject to ongoing mining activity with Mn extraction. In this study, the level and environmental significance of metals (including Mn, Cd, Pb, Cu, Zn, Ni and Fe) concentrations in the surface water and river sediments have been investigated along a 187 km reach of the Huayuan River. Using the X-ray fluorescence (XRF) analysis, we analyzed the characterization of metals in manganese sulphate waste residue (MSWR) deposited along the bank of Huayuan River. The speciation of metals in both sediment and MSWR was established using the BCR-three step sequential extraction procedure. In the water samples, the average concentrations of Mn, Cd and Pb exceeded the acceptable concentrations for drinking water in the WHO Guidelines for drinking water quality, Vol. 1, Recommendations, Geneva (2004) and Chinese (GB 5749-2006) guidelines, respectively. The average concentrations of Mn, Cd, Pb and Zn in the river sediments were found to be considerably higher than the corresponding world average shale values. The percentages of Cd (31.4%), Mn (31.1%), Zn (12.8%) and Pb (8.1%) associated with exchangeable and weak acid fraction in the sediments were higher than other metals. Mn (5.81%), Zn (0.208%), Pb (0.0292%) and Cd (0.0113%) were identified in MSWR by XRF analysis. The percentages of Mn, Cd, Zn and Pb associated with the exchangeable and weak acid soluble fraction in MSWR were 41.9%, 31.1%, 23.8% and 9.8%, respectively. The peak solute and sediment-bound metal concentrations were found at the sites of MSWR deposited along the bank of Huayuan River. The results suggested that MSWR deposited along the bank may have a closely relation with the metal pollution of Huayuan River. The results obtained may be useful to assess both short and long-term environmental impact of the MSWR deposited activities and support decisions for a future remediation of this river.
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http://dx.doi.org/10.1007/s00128-009-9802-9DOI Listing
October 2009

[Spectroscopic characterization of Tm3+ ions in zinc tungstate crystals].

Guang Pu Xue Yu Guang Pu Fen Xi 2004 Feb;24(2):129-31

College of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, China.

A series of high quality ZnWO4:Tm3+ single crystals were grown with Czochralski method. The concentrations of thulium ions were 0.1, 0.3, 0.5, 0.7 and 1.0 mol%, respectively. When ZnWO4:Tm3+ single crystals were excited by 807 nm laser, the up-conversion luminescence peaks at 486 and 695 nm which corresponded to transitions 1G4-->3H6 and 3F3-->3 H6, respectively, were detected. The intensity of 695 nm luminescence varied with the pump power in a double logarithmic relation whose indexes were 0.8 and 1.1 orders, respectively.
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February 2004

[Qualitative evaluation on literatures related with treatment of lung cancer with combined use of chemotherapy and Chinese herbs].

Zhongguo Zhong Xi Yi Jie He Za Zhi 2005 Feb;25(2):123-5

The Fourth Department of Internal Medicine, the Second Clinical College of Guangzhou Medical University, Guangzhou 510120.

Objective: To evaluate the quality of clinical literatures related with treatment of lung cancer with combined use of chemotherapy and Chinese herbs in respect of the scientific research design adapted.

Methods: According to the "Scale for Quality and Information Evaluation of TCM Clinical Research Literature" formulated by the group of methodology of this article, the literatures related with lung cancer published between 1979 to 2000 were evaluated in respect of the randomization and controlling of the trial.

Results: The method of randomization was not described in 93.7% of the literatures; problems or mistakes of randomized allocation existed in 2.5%, with no record about the state of dropped out or absconded cases in follow-up study in 29.1%, also no record about case screening was found in all the literatures. Besides, the blind trial method was seldom used, also some problems of key links concerning samples homogeneity and conclusion reasoning presented. All these bugs could influence quality of the randomized control trial.

Conclusion: Randomized control trial has been applied progressively in TCM clinical researches of lung cancer, however, there are still problems such as insufficiency of samples, and improving of the reliability and quality of the trial is needed.
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February 2005

[Progress on study of TCM prevention and treatment of post operational relapse and metastasis of lung cancer].

Zhongguo Zhong Xi Yi Jie He Za Zhi 2003 Oct;23(10):797-800

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October 2003