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Systematic identification and annotation of multiple-variant compound effects at transcription factor binding sites in human genome 被引量:1
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作者 Si-Jin Cheng Shuai Jiang +2 位作者 Fang-Yuan Shi Yang Ding Ge Gao 《Journal of Genetics and Genomics》 SCIE CAS CSCD 2018年第7期373-379,共7页
Understanding the functional effects of genetic variants is crucial in modern genomics and genetics. Transcription factor binding sites (TFBSs) are one of the most important cis-regulatory elements. While multiple t... Understanding the functional effects of genetic variants is crucial in modern genomics and genetics. Transcription factor binding sites (TFBSs) are one of the most important cis-regulatory elements. While multiple tools have been developed to assess functional effects of genetic variants at TFBSs, they usually assume that each variant works in isolation and neglect the potential "interference" among multiple variants within the same TFBS. In this study, we presented COPE-TFBS (Context-Oriented Predictor for variant Effect on Transcription Factor Binding Site), a novel method that considers sequence context to accurately predict variant effects on TFBSs. We systematically re-analyzed the sequencing data from both the 1000 Genomes Project and the Genotype-Tissue Expression (GTEx) Project via COPE-TFBS, and identified numbers of novel TFBSs, transformed TFBSs and discordantly annotated TFBSs resulting from multiple variants, further highlighting the necessity of sequence context in accurately annotating genetic variants. 展开更多
关键词 compound effect Transcription factor binding site Variant annotation BIOINFORMATICS Genetic variants
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Compound contamination and secondary ecological effects of Cd and As in soil-alfalfa ecosystems 被引量:20
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作者 Zhou Qixing Gao Zhengmin(Institute of Applied Ecology, Chinese academy of Sciences),Shenyang 10015,China) 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 1994年第3期330-336,共7页
d and As both have harmful effects on the growth,development and seed germination of alfalfa, especially in such a condition as the coexistence of Cd and As in soil environment The research using the pot-culture imita... d and As both have harmful effects on the growth,development and seed germination of alfalfa, especially in such a condition as the coexistence of Cd and As in soil environment The research using the pot-culture imitative method first found that if soil was simultaneously polluted by Cd and As,function of alfalfa absorbing Cd from soil may be promoted because of the existence of As,in conversely,Cd may inhibit alfalfa plant from absorbing As It was also found that secon- dary ecological effects were most likely to be brought out due to the coexistence of Cd and As. For example,alfalfa is passive to excessively absorb Cu and Pb .The harmful effects undoubtedly intensi- fy the contamination of alfalfa, The results showed that the mechanism of the interaction among Cd,As,Pb and Cu in soil-alfalfa ecosystems is very complicated. 展开更多
关键词 compound contamination ecological effects Cd AS soil.
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Magnetocaloric effects in RT X intermetallic compounds(R = Gd–Tm, T = Fe–Cu and Pd, X = Al and Si) 被引量:9
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作者 张虎 沈保根 《Chinese Physics B》 SCIE EI CAS CSCD 2015年第12期138-164,共27页
The magnetocaloric effect(MCE) of RT Si and RT Al systems with R = Gd–Tm, T = Fe–Cu and Pd, which have been widely investigated in recent years, is reviewed. It is found that these RT X compounds exhibit various c... The magnetocaloric effect(MCE) of RT Si and RT Al systems with R = Gd–Tm, T = Fe–Cu and Pd, which have been widely investigated in recent years, is reviewed. It is found that these RT X compounds exhibit various crystal structures and magnetic properties, which then result in different MCE. Large MCE has been observed not only in the typical ferromagnetic materials but also in the antiferromagnetic materials. The magnetic properties have been studied in detail to discuss the physical mechanism of large MCE in RT X compounds. Particularly, some RT X compounds such as Er Fe Si,Ho Cu Si, Ho Cu Al exhibit large reversible MCE under low magnetic field change, which suggests that these compounds could be promising materials for magnetic refrigeration in a low temperature range. 展开更多
关键词 rare-earth compounds magnetocaloric effect magnetic entropy change magnetic property
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STUDY OF THE EFFECT OF BORON CONTENT ON THE ORDERED EXTENT OF THE Ni_3Al INTERMETALLICS COMPOUND BY AP-FIM 被引量:3
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作者 D.G. Ren Z.Q. Li X.S. Fan and J. T. Guo Laboratory of Atomic Imaging of Solids, Institute of Metal Research, The Chinese Academy of Sciences, Shenyang 110015, China 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2000年第4期1001-1011,共11页
By using AP-FIM the varity of the ordered degree of Ni_3Al with L1_2 structure with B content was studied. The possibility of boron improving ductility was also discussed from bonding between Ni and Al atoms, and anti... By using AP-FIM the varity of the ordered degree of Ni_3Al with L1_2 structure with B content was studied. The possibility of boron improving ductility was also discussed from bonding between Ni and Al atoms, and antisite defects in Ni_3Al. The extent of ordering is reduced with an increase in boron content and the autisite defects are most obvious for 0.52at.K B-doped sample that has the best ductility. Some results were verified by X-ray diffraction non. The addition of boron not only influences electron environment at grain boundary but also in the interior of Ni_3Al gm ins, the latter is favorable to improve the ductility of Ni_3Al grains. 展开更多
关键词 intermetallic compound AP-FIM effect of boron
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Magnetic properties and magnetocaloric effects in NaZn_(13)-type La(Fe,Al)(13)-based compounds 被引量:3
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作者 沈保根 胡凤霞 +1 位作者 董巧燕 孙继荣 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第1期12-22,共11页
In this article, our recent progress concerning the effects of atomic substitution, magnetic field, and temperature on the magnetic and magnetocaloric properties of the LaFe13-xAlx compounds are reviewed. With an incr... In this article, our recent progress concerning the effects of atomic substitution, magnetic field, and temperature on the magnetic and magnetocaloric properties of the LaFe13-xAlx compounds are reviewed. With an increase of the aluminum content, the compounds exhibit successively an antiferromagnetic (AFM) state, a ferromagnetic (FM) state, and a mictomagnetic state. Furthermore, the AFM coupling of LaFe13 -xAlx can be converted to an FM one by substituting Si for A1, Co for Fe, and magnetic rare-earth R for La, or introducing interstitial C or H atoms. However, low doping levels lead to FM clusters embedded in an AFM matrix, and the resultant compounds can undergo, under appropriate applied fields, first an AFM-FM and then an FM-AFM phase transition while heated, with significant magnetic relaxation in the vicinity of the transition temperature. The Curie temperature of LaFe13-xAlx can be shifted to room temperature by choosing appropriate contents of Co, C, or H, and a strong magnetocaloric effect can be obtained around the transition temperature. For example, for the LaFel 1.5All.5Co.2Hl.o compound, the maximal entropy change reaches 13.8 J.kg-1.K-1 for a field change of 0-5 T, occurring around room temperature. It is 42% higher than that of Gd, and therefore, this compound is a promising room-temperature magnetic refrigerant. 展开更多
关键词 La(Fe Al)13 compounds magnetocaloric effect magnetic entropy change magnetic phase transition
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Mitigative Effect of La on Glycine max seedlings under Pb-Cd Compound Pollution 被引量:10
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作者 周青 黄晓华 +1 位作者 曹玉华 张剑华 《Journal of Rare Earths》 SCIE EI CAS CSCD 1999年第4期303-307,共5页
Mitigative effect of La on Glycine max seedlings under combined Pb and Cd pollution was studied through pot culture experiment. The results show that the growth and metabolism of Glycine max seedlings are inhibited by... Mitigative effect of La on Glycine max seedlings under combined Pb and Cd pollution was studied through pot culture experiment. The results show that the growth and metabolism of Glycine max seedlings are inhibited by the solution with 500 mg.L-1 Pb + 100 mg.L-1 Cd. When 30 mg. L-1 LaCl3 is used to spray Glycine max seedlings once, the injury effect of combined Pb and Cd pollution is reduced. The experiment proves that the effect is related to La which can raise photosynthetic rate, chlorophyll content and activity of nitrate reductase, and reduce cell membrane permeability, content of Pb and Cd, and keep TTC reduction ability of Glycine max seedling. 展开更多
关键词 rare earths lanthanum Glycine max seedlings Pb-Cd compound pollution mitigative effect
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Deterministic Parsing Model of the Compound Biological Effectiveness (<i>CBE</i>) Factor for Intracellular <sup>10</sup>Boron Distribution in Boron Neutron Capture Therapy 被引量:2
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作者 Shintaro Ishiyama 《Journal of Cancer Therapy》 2014年第14期1388-1398,共11页
Purpose: In defining the biological effects of the 10B(n, α)7Li neutron capture reaction, we have previously developed a deterministic parsing model to determine the Compound Biological Effectiveness (CBE) factor in ... Purpose: In defining the biological effects of the 10B(n, α)7Li neutron capture reaction, we have previously developed a deterministic parsing model to determine the Compound Biological Effectiveness (CBE) factor in Borono-Phenyl-Alanine (BPA)-mediated Boron Neutron Capture Therapy (BNCT). In present paper, we demonstrate that the CBE factor is directly and unambiguously derivable by the new formula for any case of intracellular 10Boron (10B) distribution, which is founded on this model for tissues and tumor. Method: To determine the CBE factor, we derive the following new calculation formula founded on the deterministic parsing model with three constants, CBE0, F, n and the eigen value Nth/Nmax. where, Nth and Nmax are the threshold value of boron concentration of N and saturation boron density in tissues and tumor. In order to determine these constants and the eigen values, iterative calculation technique was employed for the CEB factor and Nmax data set previously reported. Results and Conclusion: From the iterative calculation results, it is clear that the calculated CBE factor values obtained are almost identical to the original CBE factors and there is a good correlation between the original CBE factors and Nth/Nmax, when CBE0, F and n are given as 0.5, 8 and 3, respectively. These constants provide a better understanding of different types of intracellular10B distribution. 展开更多
关键词 Boron Neutron Capture Therapy compound Biological effectiveness Borono-Phenyl-Alanine Tumor 10B(n α)7Li
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Determination of the Compound Biological Effectiveness (CBE) Factors Based on the <i>ISHIYAMA-IMAHORI</i>Deterministic Parsing Model with the Dynamic PET Technique 被引量:2
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作者 Shintaro Ishiyama Yoshio Imahori +1 位作者 Jun Itami Hanna Koivunoro 《Journal of Cancer Therapy》 2015年第8期759-766,共8页
Purpose: In defining the biological effects of the 10B(n, α)7Li neutron capture reaction, we have proposed a deterministic parsing model (ISHIYAMA-IMAHORI model) to determine the Compound Biological Effectiveness (CB... Purpose: In defining the biological effects of the 10B(n, α)7Li neutron capture reaction, we have proposed a deterministic parsing model (ISHIYAMA-IMAHORI model) to determine the Compound Biological Effectiveness (CBE) factor in Borono-Phenyl-Alanine (BPA)-mediated Boron Neutron Capture Therapy (BNCT). In present paper, we demonstrate a specific method of how the application of the case of application to actual patient data, which is founded on this model for tissues and tumor. Method: To determine the CBE factor, we derived the following new calculation formula founded on the deterministic parsing model with three constants, CBE0, F, n and the eigen value Nth/Nmax.? (1), where, Nth and Nmax are the threshold value of boron concentration of N and saturation boron density and CBE0, F and n are given as 0.5, 8 and 3, respectively. In order to determine Nth and Nmax in the formula, sigmoid logistic function was employed for 10B concentration data, Db(t) obtained by dynamic PET technique. (2), where, A, a and t0 are constants. Results and Conclusion: From the application of sigmoid function to dynamic PET data, it is concluded that the Nth and Nmax for tissue and tumor are identified with the parameter constants in the sigmoid function in Equation (2) as: (3). And the calculated CBE factor values obtained from Equation (1), with Nth/Nmax. 展开更多
关键词 Boron Neutron Capture Therapy compound Biological effectiveness Borono-Phenyl-Alanine Tumor 10B(n α)7Li SIGMOID Function
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The effect of high-temperature annealing on LaFe_(11.5)Si_(1.5) and the magneto-caloric properties of La_(1-x)Ce_xFe_(11.5)Si_(1.5) compounds 被引量:7
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作者 CHEN Xiang CHEN Yungui TANG Yongbo 《Rare Metals》 SCIE EI CAS CSCD 2011年第4期343-347,共5页
The powder X-ray diffraction patterns of LaFell.sSil.5 compounds annealed at different high temperatures from 1323 K (5 h) to 1623 K (2 h) show that a large amount of 1:13 phase begins to form in LaFell.sSiL5 com... The powder X-ray diffraction patterns of LaFell.sSil.5 compounds annealed at different high temperatures from 1323 K (5 h) to 1623 K (2 h) show that a large amount of 1:13 phase begins to form in LaFell.sSiL5 compound annealed at 1423 K (5 h). In the temperature range from 1423 to 1523 K, ^-Fe and LaFeSi phases rapidly decrease to form 1:13 phase. LaFeSi phase is rarely observed, and the most amount of 1:13 phase is obtained in the compound annealed at 1523 K (5 h). With the annealing temperature increasing to 1573 and 1623 K, LaFeSi is detected again in the LaFell.sSil.s compound. According to the results of annealing at different high-temperatures, the Lal-xCexFelt.sSit.5 compounds are annealed at high temperatures of 1373 K (2 h) + 1523 K (5 h). The main phase is NaZn13-type phase, and the impurity is a small amount of et-Fe in Lal-xCexFexx.sSil.5 compounds with 0 〈 x 〈 0.35, and there is a large amount of CeaFe17 phase in Lao.sCeo.sFela.sSil.s. It indicates that the substitution of cerium atoms for La in LaFelLsSil.5 compounds has limit. At the same time, the substitution of Ce for La has large effect on magnetocaloric properties. With increasing Ce content from x = 0 to x = 0.35, the Curie temperature decreases linearly from 196 to 168 K, the magnetic entropy change increases from 16.5 to 57.3 J-kg-kK-1 in a low magnetic field change of 0-2 T, and the thermal hysteresis also increases from 3 K to 8 K. 展开更多
关键词 rare earth compounds high-temperature annealing magnetocaloric effect phase composition
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Physical and chemical effects of phosphorus-containing compounds on laminar premixed flame 被引量:1
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作者 殷永丰 蒋勇 +1 位作者 邱榕 熊才溢 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第9期360-373,共14页
Phosphorus-containing compounds are the promising halon alternatives for flame inhibitions. However, some literatures suggested that the phosphorus-related inhibitors may behave as the unfavorable ones that will incre... Phosphorus-containing compounds are the promising halon alternatives for flame inhibitions. However, some literatures suggested that the phosphorus-related inhibitors may behave as the unfavorable ones that will increase the burning velocity under lean-burn conditions, and this indeed posed potential threats to the fire prevention and fighting. To seek deeper insights into the reaction process, a numerical investigation was actualized to study the phosphorus-related effects on methane-air flames. By replacing a phosphorus-related inhibitor with the corresponding decomposed molecules, the detailed promoting and inhibiting effects of combustion were separated from the general chemical effect. A comparative study was carried out to identify the interaction between the two effects under different combustion conditions. It is observed that the promoting effect becomes the dominant factor during the reaction process when the equivalence ratio is smaller than 0.60. In this lean-burn condition, the exothermic reactions were faster than the others within the reaction chains due to the reduction of radical recombination in hydrocarbon oxidation. The results are believed to be useful for the further application and improvement of flame inhibitors. 展开更多
关键词 phosphorus-containing compounds flame inhibition chemical effect burning velocity
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Magnetic properties and magnetocaloric effects in(Ho_(1-x)Y_x)_5Pd_2 compounds 被引量:1
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作者 武小飞 郭翠萍 +5 位作者 成钢 李长荣 王江 杜玉松 饶光辉 杜振民 《Chinese Physics B》 SCIE EI CAS CSCD 2019年第5期293-299,共7页
The crystal structure, magnetic and magnetocaloric properties of(Ho_(1-x) Y_(0.5))_5 Pd_2 compounds are investigated. All the compounds crystallize in a cubic Dy_5 Pd_2-type structure with the space group Fd3 m and un... The crystal structure, magnetic and magnetocaloric properties of(Ho_(1-x) Y_(0.5))_5 Pd_2 compounds are investigated. All the compounds crystallize in a cubic Dy_5 Pd_2-type structure with the space group Fd3 m and undergo a second order transition from spin glass(SG) state to paramagnetic(PM) state. The spin glass transition temperatures T_g decrease from 26 K for x = 0 to 13 K for x = 0.5. In the PM region, the reciprocal susceptibilities for all the compounds obey the Curie–Weiss law. The paramagnetic Curie temperatures(θp) for Ho_5 Pd_2,(Ho_(0.75) Y_(0.25)_5 Pd_2, and(Ho_(0.5) Y_(0.5))_5 Pd_2 are determined to be 32 K, 30 K, and 22 K, respectively, and the corresponding effective magnetic moments(μeff) are10.8 μB/Ho, 10.3 μB/RE, and 7.5 μB/RE, respectively. Magnetocaloric effect(MCE) is anticipated according to the Maxwell relation, based on the isothermal magnetization curves. For a magnetic field change of 0–5 T, the maximum values of the isothermal magnetic entropy change-?SMof the(Ho_(1-x)Y_x)_5 Pd_2(x = 0, 0.25, and 0.5) compounds are determined to be 11.5 J·kg^(-1)·K^(-1), 11.1 J·kg^(-1)·K^(-1), and 8.9 K J·kg^(-1)·K^(-1), with corresponding refrigerant capacity values of 382.3 J·kg^(-1), 336.2 J·kg^(-1), and 242.5 J·kg^(-1), respectively. 展开更多
关键词 (Ho1-xYx)5Pd2 compoundS magnetic TRANSITION MAGNETOCALORIC effect
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Bioactive compounds of sea cucumbers and their therapeutic effects 被引量:10
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作者 时淑娟 冯文静 +3 位作者 胡松 梁世秀 安妮娜 毛拥军 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2016年第3期549-558,共10页
Sea cucumbers belong to the Class Holothuroidea of marine invertebrates.They are commercially valuable and prized as a food and folk medicine in Asia.Nutritionally,sea cucumbers have an impressive profile of valuable ... Sea cucumbers belong to the Class Holothuroidea of marine invertebrates.They are commercially valuable and prized as a food and folk medicine in Asia.Nutritionally,sea cucumbers have an impressive profile of valuable nutrients such as vitamins,minerals and amino acids.A number of unique biological and pharmacological activities/properties,including anticancer,anticoagulant/antithrombotic,antimicrobial,antioxidant,antihyperlipidemic,antihyperglycemic,anti-inflammatory,antihypertension and radioprotective,have been ascribed to various compounds isolated from sea cucumbers.The therapeutic properties and medicinal benefits of sea cucumbers can be linked to the presence of a wide array of bioactives,especially triterpene glycosides,acid mucopolysaccharide,sphingoid bases,glycolipids,fucosylated chondroitin sulfate,polysaccharides,phospholipids,cerebrosides,phosphatidylcholines,and other extracts and hydrolysates.This review highlights the valuable bioactive components as wellas the multiple therapeutic properties of sea cucumbers with a view to exploring their potential uses as functional foods and a natural source of new multifunctional drugs. 展开更多
关键词 生物活性物质 治疗作用 海参纲 海洋无脊椎动物 酸性粘多糖 磷脂酰胆碱 功能性食品 生物活性成分
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Neuroprotective effect of antioxidant compounds
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作者 Rachid Skouta 《Neural Regeneration Research》 SCIE CAS CSCD 2016年第4期566-567,共2页
Neurodegenerative diseases affect millions of individuals worldwide.It has been estimated that the number of patients affected by neurodegenerative diseases such as Alzheimer’s disease(AD),Parkinson’s disease(PD... Neurodegenerative diseases affect millions of individuals worldwide.It has been estimated that the number of patients affected by neurodegenerative diseases such as Alzheimer’s disease(AD),Parkinson’s disease(PD),Huntington’s disease(HD), 展开更多
关键词 Neuroprotective effect of antioxidant compounds PDI RNS MSNs TBI
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Magnetic transition and large reversible magnetocaloric effect in EuCu_(1.75)P_2 compound
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作者 霍德璇 廖罗兵 +2 位作者 李领伟 李妙 钱正洪 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第2期460-463,共4页
The magnetocaloric effect(MCE) in EuCu1.75P2 compound is studied by the magnetization and heat capacity measurements.Magnetization and modified Arrott plots indicate that the compound undergoes a second-order phase ... The magnetocaloric effect(MCE) in EuCu1.75P2 compound is studied by the magnetization and heat capacity measurements.Magnetization and modified Arrott plots indicate that the compound undergoes a second-order phase transition at TC ~ 51 K.A large reversible MCE is observed around TC.The values of maximum magnetic entropy change(-△SxMma) reach 5.6 J·kg^-1·K-1 and 13.3 J·kg^-1·K-1 for the field change of 2 T and 7 T,respectively,with no obvious hysteresis loss in the vicinity of Curie temperature.The corresponding maximum adiabatic temperature changes(△Tadmax) are evaluated to be 2.1 K and 5.0 K.The magnetic transition and the origin of large MCE in EuCu1.75P2 are also discussed. 展开更多
关键词 EuCu1.75P2 compound magnetocaloric effect magnetic transition critical behavior
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Magnetic properties and magnetocaloric effects in Tb6Co1.67Si3 compound
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作者 沈俊 王芳 +2 位作者 李养贤 孙继荣 沈保根 《Chinese Physics B》 SCIE EI CAS CSCD 2007年第12期3853-3857,共5页
Magnetic properties and magnetocaloric effects of Tb6Coi.67Si3 have been investigated by magnetization measurement. This compound is of a hexagonal Ce6Ni2Si3-type structure with a saturation magnetization of 187emu/g ... Magnetic properties and magnetocaloric effects of Tb6Coi.67Si3 have been investigated by magnetization measurement. This compound is of a hexagonal Ce6Ni2Si3-type structure with a saturation magnetization of 187emu/g at 5 K and a reversible second-order magnetic transition at Curie temperature TC = 186K. A magnetic entropy change △S = 7J·kg^-1·K^-1 is observed for a magnetic field change from 0 to 5T. A large value of refrigerant capacity (RC) is found to be 330 J/kg for fields ranging from 0 to ST. The large RC, the reversible magnetization around Tc and the easy fabrication make the Tb6Co1.67Si3 compound a suitable candidate for magnetic refrigerants in a corresponding temperature range. 展开更多
关键词 Tb6Co1.67Si3 compound magnetocaloric effect magnetic properties
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Magnetocaloric effects in Fe_4MnSi_3B_x interstitial compounds
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作者 Yongli WU O. Tegus +3 位作者 Weiguang ZHANG S. Yiriyoltu B. Mend Songlin 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2009年第5期397-400,共4页
The magnetic properties and magnetocaloric effect in Fe4MnSi3B~ compounds with x=0, 0.05, 0.10, 0.15, 0.20, 0.25 have been investigated. X-ray diffraction study shows that all these compounds investigated crystallize ... The magnetic properties and magnetocaloric effect in Fe4MnSi3B~ compounds with x=0, 0.05, 0.10, 0.15, 0.20, 0.25 have been investigated. X-ray diffraction study shows that all these compounds investigated crystallize in the MnsSi3-type structure with space group P63/mcm. Boron insertion in the host ternary silicide Fe4MnSi3 does not change the crystal symmetry, only leads to an increase of the lattice parameters, indicating the B atoms entered the interstitial sites. With increasing B content, the Curie temperature shifts to higher temperatures. The maximal magnetic-entropy changes of the Fe4MnSi3Bx compounds with x=0, 0.10 and 0.20 are about 1.8 J/(kg.K), 1.8 J/(kg-K) and 1.6 J/(kg.K), respectively, for a field change from 0 to 1.5 T. 展开更多
关键词 Transition metal interstitial compounds Magaetocatoric effect Magnetic properties
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MnFe(PGe) compounds: Preparation, structural evolution,and magnetocaloric effects
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作者 岳明 张红国 +1 位作者 刘丹敏 张久兴 《Chinese Physics B》 SCIE EI CAS CSCD 2015年第1期9-19,共11页
The interdependences of preparation conditions, magnetic and crystal structures, and magnetocaloric effects (MCE) of the MnFePGe-based compounds are reviewed. Based upon those findings, a new method for the evaluati... The interdependences of preparation conditions, magnetic and crystal structures, and magnetocaloric effects (MCE) of the MnFePGe-based compounds are reviewed. Based upon those findings, a new method for the evaluation of the MCE in these compounds, based on differential scanning calorimetry (DSC), is proposed. The MnFePGe-based compounds are a group of magnetic refrigerants with giant magnetocaloric effect (GMCE), and as such, have drawn tremendous attention, especially due to their many advantages for practical applications. Structural evolution and phase transformation in the compounds as functions of temperature, pressure, and magnetic field are reported. Influences of preparation conditions upon the homogeneity of the compounds' chemical composition and microstructure, both of which play a key role in the MCE and thermal hysteresis of the compounds, are introduced. Lastly, the origin of the "virgin effect" in the MnFePGe- based compounds is discussed. 展开更多
关键词 MnFePGe-based compounds magnetocaloric effect structural evolution thermal hysteresis vir- gin effect
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Study on Effect of Compound Salvia Pellet in Preventing Atrial Fibrillation with Left Atrial Thrombosis
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作者 连耀植 李玉光 +7 位作者 张汉灵 张元春 闫纯英 林建才 许端敏 张钰 郑宝群 麦芒 《Chinese Journal of Integrated Traditional and Western Medicine》 2004年第1期59-62,共4页
Atrial fibrillation (AF) is a kind of common arrhythmia, which, besides affecting cardiac function, has another serious outcome, that is, it is easy to form atrial thrombosis and induce thrombus/embolus, especially ce... Atrial fibrillation (AF) is a kind of common arrhythmia, which, besides affecting cardiac function, has another serious outcome, that is, it is easy to form atrial thrombosis and induce thrombus/embolus, especially cerebral embolus. The incidence of left atrial thrombosis ( LAT) could reach 25% - 30%(1) , the incidence of embol- 展开更多
关键词 Study on effect of compound Salvia Pellet in Preventing Atrial Fibrillation with Left Atrial Thrombosis CSP INR
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The Promotion Effect of Low-Molecular Hydroxyl Compounds on the Nano-Photoelectrocatalytic Degradation of Fulvic Acid and Mechanism 被引量:4
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作者 Yifan Dong Jinhua Li +1 位作者 Xuejin Li Baoxue Zhou 《Nano-Micro Letters》 SCIE EI CAS 2016年第4期320-327,共8页
A significant promotion effect of low-molecular hydroxyl compounds(LMHCs) was found in the nano-photoelectrocatalytic(NPEC) degradation of fulvic acid(FA),which is a typical kind of humic acid existing widely in natur... A significant promotion effect of low-molecular hydroxyl compounds(LMHCs) was found in the nano-photoelectrocatalytic(NPEC) degradation of fulvic acid(FA),which is a typical kind of humic acid existing widely in natural water bodies,and its influence mechanism was proposed.A TiO_2 nanotube arrays(TNAs) material is served as the photoanode.Methanol,ethanediol,and glycerol were chosen as the representative of LMHCs in this study.The adsorption performance of organics on the surface of TNAs was investigated by using the instantaneous photocurrent value.The adsorption constants of FA,methanol,ethanediol,and glycerol were 43.44,19.32,7.00,and 1.30,respectively,which indicates that FA has the strongest adsorption property.The degradation performance of these organics and their mixture were observed in a thin-layer reactor.It shows that FA could hardly achieve exhausted mineralization alone,while LMHCs could be easily oxidized completely in the same condition.The degradation degree of FA,which is added LMHCs,improves significantly and the best promotion effect is achieved by glycerol.The promotion effect of LMHCs in the degradation of FA could be contributed to the formation of a tremendous amount of hydroxyl radicals in the NPEC process.The hydroxyl radicals could facilitate the complete degradation of both FA and its intermediate products.Among the chosen LMHCs,glycerol molecule which has three hydroxyls could generate the most hydroxyl radicals and contribute the best effective promotion.This work provides a new way to promote the NPEC degradation of FA and a direction to remove humus from polluted water. 展开更多
关键词 Fulvic acid Nano-photoelectrocatalytic degradation Promotion effect Low-molecular hydroxyl compounds
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Quantum Size Effect of the Magnetism of an Electron in a Metal Layer of the Layered Compounds M/I/M/I…
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作者 Shen Guo-jin Wang Xin-min +1 位作者 Huang Xin-tang Wang You-qing 《Wuhan University Journal of Natural Sciences》 CAS 2000年第3期307-311,共5页
The energies and the magnetization of an electron in a piece of metal in the structure of Metal/Insulator/Metal/Insulator… (M/I/M/I…), in a magnetic field, at high temperature, and in range of quantum size thickness... The energies and the magnetization of an electron in a piece of metal in the structure of Metal/Insulator/Metal/Insulator… (M/I/M/I…), in a magnetic field, at high temperature, and in range of quantum size thickness of the piece of metal layer have been obtained. The results show that when the thickness of the metal layer becomes smaller, the orbital magnetism of the charged particles which collide with the wall of the metal layer is to vary from diamagnetism to paramagnetism. The smaller the thickness of the metal layer becomes, the more particles will collide with the boundary of the metal layer, and then the paramagnetism becomes stronger. Finally, when the thickness of the metal layer becomes very small (<100 nm), all of the orbital diamagnetism will reverse to paramagnetism, and then the paramagnetization will be almost a maximum constant. 展开更多
关键词 MAGNETIZATION layered compounds quantum size effect
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