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Competitive Complexation of Copper and Zinc by Sequentially Extracted Humic Substances from Manure Compost

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Agricultural Sciences in China 2008年第10期7卷 1253-1259页

作者： LIU Shuai WANG Xu-dong LU Li-lan DIAO shi-rong zhang Jun-feng College of Resources and Environment Northwest A ＆ F University Yangling 712100 P.R.China

Chicken manure with similar content of copper and zinc was changes of organic carbon and humus substance complexed chosen to conduct a composting experiment to investigate the copper （HS-Cu） and zinc （HS-Zn）, which were extracted by water （H2O）, sodium hydroxide （NaOH）, and sodium pyrophate-NaOH mixture （Na4P2O7-NaOH）, sequentially. Distributions of copper and zinc in fulvic acids （FA） and humic acids （HA） in the three extracts were studied. During manure composting, the concentrations of copper and zinc increased from about 500 mg kg^-1 in the raw material to 1 100 mg kg^-1 in the final products. HS-Cu in H2O, NaOH, and Na4P2O7-NaOH extracts occupied 6.7, 26.7, and 19% averagely of total copper and HS-Zn represented 2.7, 13.7, and 17% averagely of total zinc in compost, respectively. In water extracts, both HA and FA mainly complexed with Cu and the mole ratio of Cu to Zn was 2.8 in HA fractions and was 2.6 in FA fractions, respectively. HA mainly complexed with copper, so that the ratios of HA-Cu to HA-Zn averaged 3.4 in NaOH extracts. FA had a similar potential to complex with copper and zinc, so that the ratio of FA-Cu to FA-Zn was close to 1. In Na4P2O7-NaOH extracts, HA or FA had a similar potential to complex with copper and zinc. The ratio of HS-Cu to HS-Zn was close to 1. With manure composting, Na4P2O7-NaOH extractable HS-Zn increased to a level as high as HS-Cu. This indicated that more and more stable complexes of HS-Zn were formed in the late decomposition period. The competition between copper and zinc to be complexed with humic substance became weaker and weaker with the decomposition process.

关键词： manure copper and zinc decomposition process humic substance sequential extraction

Structure and properties of Tb_(0.3)Dy_(0.7)Fe_(2) alloys modified by surface nitriding

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Rare Metals 2021年第5期40卷 1198-1202页

作者： Hong-Chuan Yang shi-rong zhang Dun-Bo Yu Kuo-She Li Yuan-Fei Yang Quan-Xia Hu Yang Luo Hong-Wei Li National Engineering Research Center for Rare Earth Materials General Research Institute for Nonferrous MetalsBeijing 100088China Grirem Advanced Materials Co. Ltd.Beijing 100088China

The surface of Tb_(0.3)Dy_(0.7)Fe_(2) alloys was modified by microwave electron-cyclotron-resonance chemical vapor deposition(MW-ECR-CVD)and ion implantation technology,*** microstructure and corrosion resistance of nitrided layers were investigated by means of optical microscope(OM),X-ray diffractomer(XRD),auger electron spectroscopy(AES),and electrochemical *** modified by MW-ECR-CVD,the nitrogen concentration of the nitrided layers decreases gradually with the depth increasing,while the nitrogen concentration modified by ion implantation process exhibits Gaussian *** self-corrosion electric potential of the sample modified by ion implantation is higher than that modified by MW-ECR-CVD,which reveals that the samples modified by ion implantation process have a better resistance to *** magnetostrictions are assessed for the samples placed in the air for one year,which further confirms that the ion implantation process is more helpful to maintain the magnetostrictions.

关键词： Magnetostriction Nitriding Corrosion resistance Ion implantation Microwave electron-cyclotron-resonance chemical vapor deposition

Accelerated ovarian aging in mice by treatment of busulfan and cyclophosphamide

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2013年第4期14卷 318-324页

作者： Yan JIANG Jing ZHAO Hui-jing QI Xiao-lin LI shi-rong zhang Daniel W.SONG Chi-yang YU Jian-gang GAO Key Laboratory of the Ministry of Education for Experimental Teratology and School of Life Science Shandong University Jinan First People's Hospital Dulwich College Legend Garden Campus Department of Gynecology and Obstetrics Southwest Hospital

Busulfan/cyclophosphamide(Bu/Cy) conditioning regimen has been widely used to treat cancer patients,while their effects on major internal organs in females are not fully *** treated female mice with Bu/Cy,and examined the histopathology of major internal organs on Day 30 after the *** results show that Bu/Cy treatment affected the ovaries most extensively,while it had less effect on the spleen,lungs,and kidneys,and no effect on the heart,liver,stomach,and *** better understand the effect of Bu/Cy on the ovaries,we counted follicles,and determined the levels of ovarian *** Bu/Cy-treated mice showed a reduction of primordial and primary follicles(P<0.01) on Day 30 and a marked loss of follicles at all developmental stages(P<0.01) on Day *** levels of estradiol and progesterone in Bu/Cy-treated mice decreased by 43.9% and 61.4%,***,there was a gradual process of follicle loss and low estradiol in Bu/Cy-treated mice;this is a profile similar to what is found in women with premature ovarian failure(POF).The Bu/Cy-treated mice may serve as a useful animal model to study the dynamics of follicle loss in women undergoing POF.

关键词： Premature ovarian failure Busulfan Cyclophosphamide Chemotherapy Mouse model

The clinicopathological and prognostic significance of PD-L1 expression in pancreatic cancer:A meta-analysis

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Hepatobiliary & Pancreatic Diseases International 2018年第2期17卷 95-100页

作者： He-Li Gaoa Liang Liua Zi-Hao Qi Hua-Xiang Xu Wen-Quan Wang Chun-Tao Wu shi-rong zhang Jin-Zhi Xu Quan-Xing Ni Xian-Jun Yua Department of Pancreatic Surgery Fudan University Shanghai Cancer CenterShanghai 200032China Department of Oncology Shanghai Medical CollegeFudan UniversityShanghai 200032China Shanghai Pancreatic Cancer Institute Shanghai 200032China Pancreatic Cancer Institute Fudan UniversityShanghai 200032China

Background: Immunotherapy has shown promise against solid tumors. However, the clinical significance of programmed cell death 1(PD-1) and programmed cell death ligand 1(PD-L1) in pancreatic ductal adenocarcinoma(PDAC) remains unclear. This meta-analysis aimed to analyze the prognostic effect of PD-L1 in *** sources: Electronic search of the Pub Med, Cochrane Library and Web of Science was performed until December 2016. Through database searches, we identified articles describing the relationship between PD-L1 status and PDAC patient prognosis. Meta-analysis was performed to investigate the relationship between PD-1 and overall survival(OS).Results: Nine studies with 989 PDAC patients were included for PD-L1 expression analysis. And 5 studies with 688 PDAC patients were included in the prognostic analysis. The PD-L1 positive rate measured by immunohistochemistry(IHC) was higher than that measured by polymerase chain reaction(PCR)(P < 0.001). PDAC patients with high expression levels of PD-L1 had significantly reduced OS(HR = 2.34;95% CI: 1.78–3.08). Subgroup analysis showed that the prognostic effect of PD-L1 levels was similar between the IHC and PCR methods. The PD-L1 positive rate was associated with PDAC T stages; the PD-L1 positive rate in the T3–4 group was higher than that in the T1-2 group(OR = 0.37; P = 0.001).Conclusions: High PD-L1 expression levels predicted a poor prognosis in PDAC patients. Thus, PD-L1 status helps determine treatment in PDAC patients.

关键词： Pancreatic ductal adenocarcinoma Programmed cell death ligand 1 Prognosis Meta-analysis

Field-effect transistors based on two-dimensional materials for logic applications

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Chinese Physics B 2013年第9期22卷 147-161页

作者：王欣然施毅张荣 National Laboratory of Microstructures and School of Electronic Science and Engineering Nanjing University

Field-effect transistors （FETs） for logic applications, graphene and MoS2, are discussed. These materials have based on two representative two-dimensional （2D） materials, drastically different properties and require different consider- ations. The unique band structure of graphene necessitates engineering of the Dirac point, including the opening of the bandgap, the doping and the interface, before the graphene can be used in logic applications. On the other hand, MoS2 is a semiconductor, and its electron transport depends heavily on the surface properties, the number of layers, and the carrier density. Finally, we discuss the prospects for the future developments in 2D material transistors.

关键词： graphene MoS2 two-dimensional (2D) materials field-effect transistors

Highly bioactive nano-hydroxyapatite/partially stabilized zirconia ceramics

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Journal of Bionic Engineering 2004年第4期1卷 215-220页

作者： WANG Qing-liang, GE shi-rong, zhang De-kun College of Material Science and Engineering, China University of Mining and Technology, Xuzhou 221007, P.R. China 1 College of Material Science and Engineering China University of Mining and Technology Xuzhou 221007 P.R. China

Nanocrystalline hydroxyapatite (HA) powders have been synthesized by precipitation using Ca(NO3)2 4H2O and? (NH4)2 HPO4 at room temperature and atmospheric pressure. Nanocomposites of HA and partially stabilized zirconia (HA/PSZ) were sintered at atmospheric pressure and 1300 for 2h in air. The preparation techniques, structure and me- chanical properties of these materials were characterized. The addition of nanosized PSZ reinforcing phase to HA may lead to an improvement of the macro and micro mechanical properties and not affect its biocompatibility and bioactivity. The bending strength, fracture toughness and nano-hardness were near to or greater than those for human cortical bone and human tooth (dentine and enamel). The composite was incubated in a fresh human plasma which confirmed the bioactivity of nanosized HA/PSZ materials. The bonding reaction between HA/PSZ ceramic and the plasma proteins was found, and he- matopoietic cell phosphatase (HCP) layers formed on surface of each composite incubated in human plasma for two weeks. The diameter of a single HCP globule was less than 100 nm. Furthermore, the precipitating mechanism investigation was carried out through a comparative experiment in this paper.

关键词： bioactive ceramics hydroxyapatite PSZ nanoindentation mechanical properties 1

Effects of angiotensin-converting enzyme inhibitors and angiotensin II type 1 receptor blockers on lymphangiogenesis of gastric cancer in a nude mouse model

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Chinese Medical Journal 2008年第21期121卷 2167-2171页

作者： WANG Liang CAI shi-rong zhang Chang-hua HE Yu-long ZHAN Wen-hua WU Hui PENG Jian-jun Department of Gastroenteropancreatic Surgery First Affiliated Hospital Center of Gastric Cancer Sun Yat-sen University Guangzhou Guangdong 510080 China

Background Angiotensin-converting enzyme inhibitors （ACEI） and angiotensin II type 1 receptor blockers （ARB） can inhibit tumor growth by inhibition of angiogenesis. This study was designed to study the anticancer effects of ACEI and ARB on tumor growth and lymphangiogenesis in an implanted gastric cancer mouse model. Methods A model of gastric cancer was established by subcutaneously inoculating human gastric cancer cell line SGC-7901 into 60 nude mice. One week later, all mice were randomly divided into 5 groups. A control group received physiologic saline once daily for 21 days. Mice in the 4 treatment groups received one of the following agents by gavage once daily for 21 days： perindopril, 2 mg/kg; captopril, 5 mg/kg; Iosartan, 50 mg/kg; or valsartan, 40 mg/kg. Twenty-one days after treatment, all the mice were sacrificed and the tumors were removed. Tumor sections were processed, and immunohistochemical methods were used to observe the expressions of vascular endothelial growth factor C （VEGF-C）, matrix metalloproteinase 7 （MMP-7）, and lymphatic microvessel density （LMVD）. Results Tumor volume was significantly inhibited in all ACEI and ARB groups, compared with the control group （all P 〈0,01）. LMVD in the ACEI and ARB groups was also significantly lower than that of the control group （all P 〈0.01）. In the ACEI groups, the expressions of VEGF-C and MMP-7 were both significantly decreased, compared with the control group （all P 〈0.05）. In the ARB groups, expression of VEGF-C was significantly decreased compared with the control group （all P 〈0.05）. However, no significant difference was found in the expression of MMP-7 between ARB groups and the control group. Conclusion In a mouse model, ACEI and ARB might inhibit gastric cancer tumor growth by suppressing lymphangiogenesis.

关键词： stomach neoplasms angiotensin-converting enzyme inhibitor angiotensin Ⅱ type Ⅰ receptor blocker lymphangiogenesis

Flexible molecules dedicate to release strain of inverted inorganic perovskite solar cell

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Journal of Energy Chemistry 2025年第1期100卷 87-93页

作者： Hongrui Sun Sanlong Wang Pengyang Wang Yali Liu Shanshan Qi Biao shi Ying Zhao Xiaodan zhang Institute of Photoelectronic Thin Film Devices and Technology Renewable Energy Conversion and Storage Center State Key Laboratory of Photovoltaic Materials and CellsNankai University Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin Haihe Laboratory of Sustainable Chemical Transformations Engineering Research Center of Thin Film Photoelectronic Technology of Ministry of Education Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)

The tensile strain in inorganic perovskite films induced by thermal annealing is one of the primary factors contributing to the inefficiency and instability of inorganic perovskite solar cells （IPSCs）,which reduces the defect formation ***,a flexible molecule 5-maleimidovaleric acid （5-MVA） was introduced as a strain buffer to release the residual strain of *** anhydride and carboxyl groups in 5-MVA interact strongly with the uncoordinated Pb2+through Lewis acid-base reaction,thus tightly“pull”the perovskite *** in-between soft carbon chain increased the structural flexibility of CsPbI2.85Br0.15perovskite materials,which effectively relieved the intrinsic internal strain of CsPbI2.85Br0.15,resisted the corrosion of external strain,and also reduced the formation of defects such as VIand *** addition,the introduction of 5-MVA improved crystal quality,passivated residual defects,and narrowed energy level ***,power conversion efficiency （PCE） of NiOxbased inverted IPSCs increased from 19.25% to 20.82% with the open-circuit voltage enhanced from 1.164 V to 1.230 *** release of strain also improved the stability of CsPbI2.85Br0.15perovskite films and devices.

关键词： Inverted inorganic perovskite solar cells Flexible molecules Strain release Crystallization Energy barrier High PCE

Effect of pyrite content on chalcopyrite flotation under different regrinding conditions

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 49-57页

作者： Zejun Wang Qing shi Guofan zhang Yuxuan Zhu Binbin Li School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources Central South UniversityChangsha 410083China

This study aimed to investigate the effect of varying pyrite(Py)content on copper(Cu)in the presence of different regrinding conditions,which were altered using different types of grinding media:iron,ceramic balls,and their mixture,followed by flotation in the cleaner *** flotation performance of rough Cu concentrate can be improved by changing the regrinding conditions based on the Py *** electron microscopy,X-ray spectrometry,ethylenediaminetetraacetic acid disodium salt extraction,and X-ray photoelectron spectroscopy studies illustrated that when the Py content was high,the use of iron media in regrinding promoted the generation of hydrophilic Fe OOH on the surface of Py and improved the Cu *** ceramic medium with a low Py content prevented excessive Fe OOH from covering the surface of chalcopyrite(Cpy).Electrochemical studies further showed that the galvanic corrosion current of Cpy-Py increased with the addition of Py and became stronger with the participation of iron media.

关键词： chalcopyrite regrinding media pyrite galvanic corrosion flotation