扬( 州) - 瓜( 州) 公路交通肇事刑事侦破中环境磁学的应用

本文在土壤学方法的基础上,尝试应用环境磁学手段,帮助侦破一起道路交通刑事案件。实践表明:环境磁学在刑事案件的侦破中,对于土壤和沉积物样品的鉴别分析,具有独特的意义。     

2012 年全国生物磁学会议第一轮通知（征稿通知）

各有关单位:由中国生物医学工程学会、中国电子学会应用磁学分会主办,山东省医学影像学研究所、山东超瑞施生物磁学工程技术研究中心承办的2012年全国生物磁学会议,定于2012年4月26-29日(26日报到)在山东省济南市召开。会议将邀请生物磁学研究领域的著名专家和大专院校、研究机构、生产企业和临床应用等单位的科研人员参加,为从事生物磁学科研人员提供学术研讨和     

2012 年全国生物磁学会议第一轮通知（征稿通知）

各有关单位:由中国生物医学工程学会、中国电子学会应用磁学分会主办,山东省医学影像学研究所、山东超瑞施生物磁学工程技术研究中心承办的2012年全国生物磁学会议,定于2012年4月26-29日(26日报到)在山东省济南市召开。会议将邀请生物磁学研究领域的著名专家和大专院校、研究机构、生产企业和临床应用等单位的科研人员参加,为从事生物磁学科研人员提供学术研讨和     

磁处理对红壤酶活性和牧草（苏丹草）幼苗生长的影响

磁生物效应即外加磁场或磁处理对生物的影响,是生物磁学的重要组成部分,也是土壤磁学和环境磁学中正在开拓的领域[1]。60年代以来,随着现代磁学和分子、量子生物学的迅猛发展,同时也是为了工农业生产、医药卫生、环境保护等发展的需要,磁生物效应的研究不断扩大和深入,磁生物效应机制的探讨和研究由宏观走向微观,由单纯的物理和化学效应观察走向生物生理和生化的研究。当前,磁生物效应研究逐渐向各学科渗透,一方面为磁处理技术在各科学领域的应用提供理论依据和技术参数,另一方面从不同的角度来揭示磁生物效应的微观机制。本文着重研究了磁…     

纳米技术在刑事侦查潜指纹鉴定中的应用

指纹的法医鉴定被广泛应用于罪犯的人身认定,已成为基础的法庭证据。纳米技术的快速发展,使检验和鉴定潜指纹成为可能。本文综述了近年来纳米科技在刑事案件侦破中的指纹检验与鉴定中的应用及发展现状。重点讨论了光致发光法显现潜指纹与纳米技术的具体应用,对纳米技术在未来刑侦潜指纹鉴定中的应用前景也进行了展望。     

当代磁学发展的特点和展望

当代磁学发展的特点纵观从古代磁学、近代磁学、现代磁学发展到当代磁学的历史过程犤１犦,横视从传统磁学扩大到原子核磁学、基本粒子磁学、地球磁学、宇宙磁学、生物磁学等边缘磁学的广义磁学的扩展过程犤２犦,可以从这些历史中和扩展过程中总结出一些特点,也可以作出若干展望。下面分别对当代磁学和当代边缘磁学的发展特点和展望作一概略的论述。由于当代磁学和当代边缘磁学的内容十分丰富,进展又非常迅速,故只能选取其中一些事例加以简略论述,而不可能进行较全面的介绍。当代磁学发展的特点主要表现在研究深入、领域扩大、联系增多…     

磁处理在中医药中的应用研究

本文介绍了磁学的发展历程及历史沿革,并将磁学与现代医学相结合,列举了磁学在临床的诸多应用.阐述了磁处理基本原理和对水的影响,介绍了磁处理水的广泛应用,同时将磁处理与传统中药相结合,初步探究两者之间的协同作用,并将磁处理作为中药提取手段之一.通过对中药化学成分的改变,药理作用的改变,临床疗效的改变等指标,拓展磁处理在中医药领域中的发展前景.     

我国磁学领域的发展轨迹--年年综述

李国栋教授是我国著名的物理学家,是我国广义磁学、生物磁学研究领域的开拓者之一。半个世纪以来,李国栋教授为我国磁学事业的发展做出了重要贡献。曾荣获国家科技进步奖和中国科学院一等奖等多项奖励。既使退休之后他仍然十分关注磁学的前沿研究、关心《生物磁学》杂志的发展,每年为本刊撰写磁学领域的发展综述。在此我们向他致以真诚的感谢和由衷的敬意!     

我国磁学领域的发展轨迹——年年综述

李国栋教授是我国名的物理学家,是我国广义磁学、生物磁学研究领域的开拓之一。半个世纪以来,李国栋教授为我国磁学事业的发展做出了重要贡献。曾荣获国家科技进步奖和中国科学院一等奖等多项奖励。既使退休之后他仍然十分关注磁学的前沿研究、关心《生物磁学》杂志的发展,每年为本刊撰写磁学领域的发展综述。在此我们向他致以真诚的感谢和由衷的敬意![编按]     

2012年全国生物磁学会议第一轮通知(征稿通知)

各有关单位:由中国生物医学工程学会、中国电子学会应用磁学分会主办,山东省医学影像学研究所、山东超瑞施生物磁学工程技术研究中心承办的2012年全国生物磁学会议,定于2012年4月26-29日(26日报到)在山东省济南市召开。会议将邀请生物磁学研究领域的著名专家和大专院校、研究机构、生产企业和临床应用等单位的科研人员参加,为从事生物磁学科研人员提供学术研讨和     

山西耕作土壤样品磁性空间分异及其环境意义

本文分析了山西高原土壤耕作层(0-20cm)25个样品的磁性,用GIS空间分析方法,得出土壤磁化率平面分布等值线图和空间三维模型。磁化率空间分布机理如下:首先,强烈的人为影响使土壤中磁性矿物人为来源占有重要地位。第二,土壤磁性矿物以亚铁磁性的磁铁矿和磁赤铁矿为主导。第三,土壤磁化率极值差及其与母质之间的差异均受广泛而较均一的黄土母质的影响。第四,晋西北和晋中等区域出现土壤磁化率高值区域。第五,人为作用强烈影响掩盖了气温、降水等气候因子对土壤磁化率的作用。     

山西耕作土壤样品磁性空间分异及其环境意义

本文分析了山西高原土壤耕作层（0-20cm）25个样品的磁性,用GIS空间分析方法,得出土壤磁化率平面分布等值线图和空间三维模型.磁化率空间分布机理如下：首先,强烈的人为影响使土壤中磁性矿物人为来源占有重要地位.第二,土壤磁性矿物以亚铁磁性的磁铁矿和磁赤铁矿为主导.第三,土壤磁化率极值差及其与母质之间的差异均受广泛而较均一的黄土母质的影响.第四,晋西北和晋中等区域出现土壤磁化率高值区域.第五,人为作用强烈影响掩盖了气温、降水等气候因子对土壤磁化率的作用.     

Mononuclear and polynuclear halide and nitrate Cu(II) compounds with 1,4,5-triazanaphthalene as a ligand: Characterization, magnetism and X-ray structures

Using the ligand 1,4,5-triazanaphthalene (abbreviated as tan) in combination with Cu(II) salts, three mononuclear compounds, Cu(tan)₂Cl₂ (1), Cu(tan)₂Br₂ (3), Cu(tan)₂(NO₃)₂ (5) and three polynuclear compounds, [Cu(tan)Cl₂]_n (2), [Cu(tan)Br₂]_n (4), [Cu(tan)(NO₃)₂]_n (6) have been synthesized and characterized by UV-Vis, EPR, FTIR and Far-FTIR spectroscopies. The crystal structures of compounds 1, 3, 5 and 6 are reported, as well as that of the dioxane adduct of compound 4, [Cu(tan)Br₂(C₄H₈O₂)](C₄H₈O₂) (4A).The structure of (2) was solved by X-ray powder diffraction. The coordination geometry around the Cu(II) atoms is tetrahedral for (1) and (3), square-pyramidal for (4A) and distorted octahedral for (5) and (6). Magnetic susceptibility measurements on the polynuclear compounds revealed weak antiferromagnetic interactions between the Cu(II) atoms with interaction constants (J) of J = −9.1 and −10.5 cm⁻¹, for 4 and 6, respectively. For compound 2 two options for possible interactions were considered, with interaction constants which vary for J_rung −22.0 to −13.5 cm⁻¹ and J_rail −19.6 to −17.0 cm⁻¹. These figures are discussed in the light of relevant structural parameters and literature.     

1,1′-Diethyl-2,2′,3,3′,4,4′,5,5′-octamethylferrocenium tetracyanoethylenide, [Fe(C5EtMe4)2][TCNE], a charge-transfer salt magnetic solid with a novel structural motif

1,1′-Diethyl-2,2′,3,3′,4,4′,5,5′-octamethylferrocene has been utilized as a one-electron donor in the synthesis of a tetracyanoethylene charge-transfer salt, [Fe(C₅EtMe₄)₂]⁺[TCNE]⁻. Structural characterization shows that it adopts an arrangement of anions and cations completely different from the usual π stacking seen in analogous decamethylferrocenium compounds. The TCNE radical sits along side of the ferrocene, nearly perpendicular to the planes of the C₅ rings. The nearly square geometry of the TCNE anion creates disorder over two orientations. [Fe(C₅EtMe₄)₂]⁺[TCNE]⁻ is a simple paramagnet exhibiting neither long-range magnetic order nor slow paramagnetic relaxation to the lowest measured temperatures (ca. 1.8 K) as determined by both ac and dc magnetic susceptibility and Mössbauer spectroscopy (ca. 1.3 K).     

Structural and magnetic properties of Ln(III) complexes with diimines and crotonato as a bridging ligand

Five new lanthanide complexes displaying crotonato bridges have been prepared: [Gd₂(crot)₆(H₂O)₄] · 4(bpa) (1); [Ho₂(crot)₇]_n · (Hbpa) (2); [Gd₂(crot)₆(bipy)₂] (3); [Ho₂(crot)₆(bipy)₂] (4) and [Nd₂(crot)₆(H₂O)₃]_n (5), where bipy=2,2^′-bipyridine; bpa=di(2-pyridyl)amine; crot=crotonato. The compounds were characterized by magnetic susceptibility measurements and their crystal structures were determined by single crystal X-ray diffraction. These studies showed complexes 1, 3 and 4 to be dimers while structures 2 and 5 are polymeric in nature.     

Synthesis, structure, and magnetism of a binuclear Co(II) complex of a potentially bis-tridentate verdazyl radical ligand

The synthesis, structure, and magnetic properties of a dinuclear Co(II) complex of a tridentate verdazyl radical are presented. The reaction of a tetrazane containing a 4,6-bis(2-pyridyl)-pyrimid-2-yl substituent with cobalt chloride hexahydrate in aerated solution leads to in situ oxidation of the tetrazane to a verdazyl radical which is coordinated to Co(II) in a tridentate manner. The second tridentate coordination site of the verdazyl remains vacant. The crystal structure reveals the complex to be dimeric, with the cobalt ions linked by two bridging chlorides. The structure of Co₂Cl₂ core is highly asymmetric, with two short (2.3317 Å) and two long (2.744 Å) Co-Cl bonds. There are relatively short intermolecular contacts between coordinated verdazyl radicals in the solid state. Magnetic susceptibility data from 2 to 300 K suggest intramolecular ferromagnetic interactions, and modeling of the high-temperature data produced a best fit with J_Co-verdazyl of +20 cm⁻¹.     

The effects of buried magnets on colonies of Amitermes spp. building magnetic mounds in northern Australia1

ABSTRACT Unlike four control colonies of Amitermes which built normal, north-south oriented 'magnetic' mounds in northern Australia, four young colonies failed after exposure to experimental alteration of the earth's magnetic field. In November 1979, bar magnets were buried on either side at the base of each of three new nests of Amitermes laurensis Mjoberg and one new colony of A.vitiosus Hill. As controls, non-magnetized iron bars were disposed similarly in relation to three new nests of the former species and one of the latter. In September 1986, all four control nests had grown normally. However, not one of the treatment colonies survived and from what remained of the former nest in each case it is clear that the demise of the colonies occurred soon after the magnets were placed. We conclude that the failure of these colonies was the result of the changed magnetic environment. Whether 'magnetic' termites use magnetoperception as a cue to achieve their spectacular north-south orientation remains unknown, but the results of this field experiment weigh more for than against this possibility.     

New dinuclear Co(II) and Mn(II) complexes of the phenol-based compartmental ligand containing formyl and amine functions: structural, spectroscopic and magnetic properties

The phenol-based compartmental ligand Hpy2ald contains a tridentate amino arm and a weak donor aldehyde group at the 2^′ and at the 6^′ positions of the phenol ring, respectively. This ligand reacts with cobalt(II) perchlorate, cobalt(II) tetrafluoroborate and manganese(II) perchlorate, yielding dinuclear complexes, where two metal ions are doubly bridged by two deprotonated cresolate moieties. The coordination environment around the metal ions is then completed to a very distorted octahedron by three nitrogen donor atoms from the pendant amino arm and the oxygen atom of the aldehyde group. The crystal structures of the complexes, their spectroscopic and magnetic properties are reported.     

A dinuclear copper(II) complex with a Cu(O, N-O)Cu bridging core: structural and magnetic (experimental and density functional theory) studies

The molecular and electronic structure, along with the magnetic properties of a dinuclear complex in which two copper ions interact through a phenoxo oxygen atom and an oximato group are presented. The complex [CuL³Cu(O₂CCH₃)]3H₂O ·  0.5CH₃OH (3) crystallizes in the monoclinic space group Cc, with a=28.432(2) Å, b=12.305(1) Å, c=13.159(1) Å and β=99.580(9)°. The X-ray molecular structure shows that the core of the molecule comprising the two metal ions and the seven neighboring donors is nearly planar. The copper(II) ions were found to be antiferromagnetically coupled with a singlet-triplet splitting of 764(4) cm⁻¹. Density Functional Theory (DFT) showed that the magnetic orbitals are largely delocalized towards the bridging area, and an antiferromagnetic interaction in good agreement with the experimental data was computed using the Broken Symmetry (BS) formalism to obtain the energy of the singlet state.