886 research outputs found
噬菌體xf的抗血清對感染細菌的影響
No full text[[abstract]]當線狀噬菌體xf感染水稻白葉枯病原細菌Xanthomonas Oryjae時，寄主細胞並
不溶解，而仍舊連續生長、增殖，並釋出新生的噬菌體，但是當加入xf之抗血清至
感染細菌中時，感染細菌產生菌落以及產生病毒。（感染中心）的能力喪失。而未
感染的細菌則能於XF抗血清之存在下，正常生長。
抗血清對感染細菌細胞的作用時間是在虹感染後潛伏期之終了（大約感染後２
小時），這個事實表示抗血清作用的地方是在寄主細胞外，或正排出寄主細胞的噬
菌體，以Rifampiuin處理細菌，可以得到吸附噬菌體的細菌細胞、噬菌體因缺少引
導物，不能侵入寄主細胞，即留在細胞表面，和寄主細胞噬菌體的情形相似，加入
Xf抗血清也可以殺死吸附噬菌體的細菌細胞。
以顯微培養技術觀察的結果，發現在培養12小時後，75％的寄主細胞分裂成兩
個細胞，至26小時，大約63％的細胞仍舊停留在二個細胞階段，以放射性測定Xf抗
血清處理的感染細菌，其ＤＮＡ、ＲＮＡ和蛋白質合成能力在二小時以內仍繼續進
行。
因此噬菌體的抗血清處理的感染菌，仍然可以分裂一次。
Contractions of Lie bialgebras and quantum algebras
No full textContractions of Lie bialgebras and Hopf algebras are discussed with examples. Especially, it is shown that the Lie bialgebras associated with the compact simple Lie algebras and the quantum doubles associated with the complex simple Lie algebras can be contracted.Physics, MultidisciplinarySCI(E)中国科学引文数据库(CSCD)0ARTICLE2263-2683
FOCK REPRESENTATIONS OF LIE-ALGEBRAS, LOOP ALGEBRAS AND AFFINE LIE-ALGEBRAS
No full textExplicit Fock representations of the classical Lie algebras in terms of boson creation and annihilation operators with an arbitrary highest weight are derived, and a general rule to construct Fock representations of a loop algebra from a boson realization of its corresponding Lie algebra is established. A new kind of lowest weight representations of the affine Lie algebras attached to the classical Lie algebras, which require a zero center, is also presented. Based on these, a simple affinization procedure is given to obtain the Fock representations of level 1 of these affine Lie algebras.Physics, MultidisciplinarySCI(E)中国科学引文数据库(CSCD)0ARTICLE3311-3202
DIDACTIC IDEAS AND PEDAGOGICAL CONCEPTS IN THE PARABLES OF XF C. GELLERT
No full text<p>This in the article<strong> </strong>Didactic ideas and pedagogical concepts in the parables of XF C. Gellert about written of C. Gellert " Parable and of the collection of stories " ( " Fabeln und Erzählungen " ). himself of the author classic meaning in the form of parable from the text moving away and allegorical in the form of short instructive poetic parable genre is approaching shows. </p>
Generalized quantum games with Nash Equilibrium
No full textWe define generalized quantum games by introducing the coherent payoff operators and propose a simple scheme to illustrate it. The scheme is implemented with a single spin qubit system and a two-entangled-qubit system. The Nash Equilibrium Theorem is proved for the models.Physics, MultidisciplinarySCI(E)中国科学引文数据库(CSCD)1ARTICLE4553-5564
Crystallographic and magnetic properties of nitride R3Fe29-xCrxN4 (R = Y, Ca, Nd, Sm, Gd, Tb, and Dy)
No full textA systematic investigation of crystallographic and magnetic properties of nitride R3Fe29-xCrxN4 (R=Y, Ce, Nd, Sm, Gd, Tb, and Dy) has been performed. The lattice constants and unit cell volume decrease with increasing rare earth atomic number from Nd to Dy, reflecting the lanthanide contraction. After nitrogenation the relative volume expansion of each nitride is around between 5% and 7%. The nitrogenation results in a good improvement in the Curie temperature, the saturation magnetization and anisotropy fields at 4.2 K, and room temperature for R3Fe29-xCrxN4. Magnetohistory effects of R3Fe29-xCrxN4 and R3Fe29-xCrx (R=Nd and Sm) are observed in a low field of 0.04 T. First order magnetization process occurs in Sm3Fe24.0Cr5.0N4 in magnetic fields of 2.8 T at 4.2 K. After nitrogenation, the easy magnetization direction of Sm3Fe24.0Cr5.0 is changed from the easy-cone structure to the uniaxial. The good intrinsic magnetic properties of Sm3Fe24.0Cr5.0N4 make this compound a hopeful candidate for new high-performance hard magnets. (C) 1998 American Institute of Physics
Obstructive sleep apnea affects the clinical outcomes of patients undergoing percutaneous coronary intervention [Corrigendum]
No full textZhang JJ, Gao XF, Ge Z, et al. Patient Prefer Adherence. 2016;10:871–878.The authors belatedly note an error in their methodology, and advise that the data for the obstructive sleep apnea (OSA) group is therefore flawed.The authors also note that Chi-Hang Lee should not have been included in the author list, therefore the author and affiliation list should have been:Jun-jie Zhang1,2,*Xiao-fei Gao1,*Zhen Ge1,2Xiao-Min Jiang1Ping-xi Xiao1,2Nai-liang Tian1,2Jing Kan2Shao-Liang Chen1,21Department of Cardiology, Nanjing First Hospital, Nanjing Medical University, 2Department of Cardiology, Nanjing Heart Center, Nanjing, People’s Republic of China*These authors contributed equally to this workRead the original articl
Crystallographic and magnetic properties of R3Fe29-xVxN4 (R = Y, Ce, Nd, Sm, Gd, Tb, and Dy)
No full textA systematic investigation of crystallographic and magnetic properties of nitride R3Fe29-xVxN4 (R = Y, Ce, Nd, Sm, Gd, Tb, and Dy) has been performed. Nitrogenation leads to a relative volume expansion of about 6%. The lattice constants and unit cell volume decrease with increasing rare-earth atomic number from Nd to Dy, reflecting the lanthanide contraction. On average, the Curie temperature increases due to the nitrogenation to about 200 K compared with its parent compound. Generally speaking, nitrogenation also results in a remarkable improvement of the saturation magnetization and anisotropy fields at 4.2 K and room temperature for R3Fe29-xVxN4 compared with their parent compounds. The transition temperature indicates the spin reorientations of R3Fe29-xVxN4 for R = Nd and Sm are at around 375 and 370 K which are higher than that of R3Fe29-xVx, for R = Nd and Sm 145 and 140 K, respectively. The magnetohistory effects of R3Fe29-xVxN4 (R = Ce, Nd, and Sm) are observed in low fields of 0.04 T. After nitrogenation the easy magnetization direction of Sm3Fe26.7V2.3 is changed from an easy-cone structure to the b-axis. As a preliminary result, a maximum remanence B-r of 0.94 T, an intrinsic coercivity mu(0)H(C) of 0.75 T, and a maximum energy product (B H)(max) of 108.5 kJ m(-3) for the nitride magnet Sm3Fe26.7V2.3N4 are achieved by ball-milling at 293 K
Deviation from the stoichiometric composition of single-crystal 'Er2Co17'
No full textThe deviation from the stoichiometric composition of single-crystal 'Er2Co17' has been determined by theoretical analysis. It is found that the composition of this single-crystal 'Er2Co17' is rich in cobalt, and its real composition is suggested to be Er2-deltaCo17+2 delta (delta = 0.14) on the basis of a comparison of calculations based on the single-ion model with a series of experiments. The values of the Er-Co exchange field H-ex and the crystalline-electric-field (CEF) parameters A(n)(m) at the rare-earth (R) site in the 'Er2Co17' compound are also evaluated at the same time. The experiments provide the following data: the temperature dependence of the spontaneous magnetization of the compounds and the normalized magnetic moment of the Er ion, the magnetization curves dong the crystallographic axes at 4.2 K and 200 K, and the temperature dependence of the magnetization along the crystallographic axes in a field of 4 T
Structure and magnetic properties of nitrides R3Fe29-xCrxN4
No full textA systematic investigation of nitrides R3F29-xCrxN4 (R = Y, Ce, Nd, Sm, Gd, Tb, and Dy) has been performed. The nitrogen concentration in the nitride R3Fe29-xCrxNy was determined to be y = 4. Nitrogenation leads to a relative volume expansion of about 5.3%. The lattice constants and unit cell volume decrease with increasing rare earth atomic number from Nd to Dy, reflecting the lanthanide contraction. In average, the increase of Curie temperature upon nitrogenation is about 200 K, compared with its parent compound. The nitrogenation also results in a remarkable improvement in the saturation magnetization and anisotropy fields for R3Fe29-x CrxN4 at 4.2 K and room temperature, compared with their parent compounds. A spin reorientation of Nd3Fe24.5Cr4.5N4 occurs at around 368 K, which is 138 K higher than that of Nd3F24.5Cr4.5. Magnetohistory effects of R3Fe29-xCrxN4 (R = Nd and Sm) are observed in a low field of 0.04 T. First-order magnetization process occurs in Sm3Fe24.0Cr5.0N4 in magnetic fields of around 3.0 T at 4.2 K. After nitrogenation the easy magnetization direction of Sm3Fe24.0C5.0 is changed from the easy-cone structure to the uniaxial. The excellent intrinsic magnetic properties of Sm3Fe24.0Cr5.0N4 make this compound a hopeful candidate for new high-performance permanent magnets
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