Time－dependentTheoryofRamanScatteringwithPulses－－ApplicationtoContinuumRamanSpectroscopy

Ｔｉｍｅ－ｄｅｐｅｎｄｅｎｔＴｈｅｏｒｙｏｆＲａｍａｎＳｃａｔｔｅｒｉｎｇｗｉｔｈＰｕｌｓｅｓ－－ＡｐｐｌｉｃａｔｉｏｎｔｏＣｏｎｔｉｎｕｕｍＲａｍａｎＳｐｅｃｔｒｏｓｃｏｐｙＳｏｏ－Ｙ．Ｌｅｅ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，Ｆａｃｕｌ...     

AStudyoftheCis－TransIsomersofβ－Apo－12′－CarotenalbyResonanceRamanSpectroscopyatLowTemperature

ＡＳｔｕｄｙｏｆｔｈｅＣｉｓ－ＴｒａｎｓＩｓｏｍｅｒｓｏｆβ－Ａｐｏ－１２′－ＣａｒｏｔｅｎａｌｂｙＲｅｓｏｎａｎｃｅＲａｍａｎＳｐｅｃｔｒｏｓｃｏｐｙａｔＬｏｗＴｅｍｐｅｒａｔｕｒｅ￥ＹｉｎｇＨｕ；Ｔａｄａｓｈｉ；ＭｉｚｏｇｕｃｈｉａｎｄＹａｓｕｓ...     

Studying the Mode－Spectra Characteristics of An Above－Threshold Biased Semiconductor Laser

ＳｔｕｄｙｉｎｇｔｈｅＭｏｄｅ－ＳｐｅｃｔｒａＣｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆＡｎＡｂｏｖｅ－ＴｈｒｅｓｈｏｌｄＢｉａｓｅｄＳｅｍｉｃｏｎｄｕｃｔｏｒＬａｓｅｒ￥ＸＩＡＧｕａｎｇｑｉｏｎｇ；ＷＵＺｈｅｎｇｍａｏ；ＣＨＥＮＪｉａｎｇｕｏ；ＬＵＹｕｃｕ...     

Effects of He－Ne laser irradiation on acupuncture points on Enzymic activity of SDH，3β－HSDH and 17β－HSDH of uteri and ovaria in rabbits

Ｅｆｆｅｃｔｓ ｏｆ Ｈｅ－Ｎｅ ｌａｓｅｒ ｉｒｒａｄｉａｔｉｏｎ ｏｎ ａｃｕｐｕｎｃｔｕｒｅ ｐｏｉｎｔｓ ｏｎ Ｅｎｚｙｍｉｃ ａｃｔｉｖｉｔｙ ｏｆ ＳＤＨ，３β－ＨＳＤＨ ａｎｄ １７β－ＨＳＤＨ ｏｆ ｕｔｅｒｉ ａｎｄ ｏｖａｒｉａ ...     

Studies on Passive Mode－Locking Characteristics of Nd：YAG Laser With a Nonlinear Coupled－Cavity

ＳｔｕｄｉｅｓｏｎＰａｓｓｉｖｅＭｏｄｅ－ＬｏｃｋｉｎｇＣｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆＮｄ：ＹＡＧＬａｓｅｒＷｉｔｈａＮｏｎｌｉｎｅａｒＣｏｕｐｌｅｄ－ＣａｖｉｔｙＳｔｕｄｉｅｓｏｎＰａｓｓｉｖｅＭｏｄｅ－ＬｏｃｋｉｎｇＣｈａｒａｃｔｅｒｉｓｔｉ...     

Study of Nonlinear Optical Properties of Organic Material Utilizing Two－color Z－scan

ＳｔｕｄｙｏｆＮｏｎｌｉｎｅａｒＯｐｔｉｃａｌＰｒｏｐｅｒｔｉｅｓｏｆＯｒｇａｎｉｃＭａｔｅｒｉａｌＵｔｉｌｉｚｉｎｇＴｗｏ－ｃｏｌｏｒＺ－ｓｃａｎＹＡＮＧＭｉａｏ；ＹＩＮＺｕｘｉｎｇ；ＬＩＦｅｎｇ；ＳＯＮＧＹｉｎｇｌｉｎ；ＬＩＣｈｕｎｆｅｉ（Ｄｅｐ...     

Generation of Stable Near－infrared and Violet Femtosecond Pulses from a Self－mode－locked Ti：Sapphire Laser

ＧｅｎｅｒａｔｉｏｎｏｆＳｔａｂｌｅＮｅａｒ－ｉｎｆｒａｒｅｄａｎｄＶｉｏｌｅｔＦｅｍｔｏｓｅｃｏｎｄＰｕｌｓｅｓｆｒｏｍａＳｅｌｆ－ｍｏｄｅ－ｌｏｃｋｅｄＴｉ：ＳａｐｐｈｉｒｅＬａｓｅｒ￥ＬＩＷｅｉｌｉａｎｇ；ＱＩＵＺｈｉｒｅｎ；ＰＥＮＧＷｅｎｊｉ...     

Pure Dispersive Optical Bistability of Four－level System in a Fabry－Perot Cavity

ＰｕｒｅＤｉｓｐｅｒｓｉｖｅＯｐｔｉｃａｌＢｉｓｔａｂｉｌｉｔｙｏｆＦｏｕｒ－ｌｅｖｅｌＳｙｓｔｅｍｉｎａＦａｂｒｙ－ＰｅｒｏｔＣａｖｉｔｙ￥ＪＩＹｉｎｇ；ＬＩＮＦｕｃｈｅｎｇ（ＳｈａｎｇｈａｉＩｎｓｔｉｔｕｔｅｏｆＯｐｔｉｃｓａｎｄＦｉｎｅＭｅｃｈ...     

Fundamental Soliton Compression due to Induced－phase－modulation in the Regime of Normal Group－velocity Dispersion

ＦｕｎｄａｍｅｎｔａｌＳｏｌｉｔｏｎＣｏｍｐｒｅｓｓｉｏｎｄｕｅｔｏＩｎｄｕｃｅｄ－ｐｈａｓｅ－ｍｏｄｕｌａｔｉｏｎｉｎｔｈｅＲｅｇｉｍｅｏｆＮｏｒｍａｌＧｒｏｕｐ－ｖｅｌｏｃｉｔｙＤｉｓｐｅｒｓｉｏｎ￥ＸＵＷｅｎｃｈｅｎｇ；ＬＩＵＪｕｎｍｉｎ；ＬＩ...     

Generation of 2－10ns Excimer Laser Pulse by Optical Synchronizing Wave－clipping

Ｇｅｎｅｒａｔｉｏｎｏｆ２－１０ｎｓＥｘｃｉｍｅｒＬａｓｅｒＰｕｌｓｅｂｙＯｐｔｉｃａｌＳｙｎｃｈｒｏｎｉｚｉｎｇＷａｖｅ－ｃｌｉｐｐｉｎｇＸＩＡＮＧＳｈｉｑｉｎｇ；ＬＯＵＱｉｈｏｎｇ；ＤＯＮＧＪｉｎｇｘｉｎｇ；ＭＡＮＧＹａｎｐｉｎｇ；ＷＥＩＹｕｎｒ...     

The effects of thermal activation on the complex conductivity of Ag2HgI4 in the microwave region

The complex conductivity of polycrystalline Ag₂HgI₄, a superionic conductor, has been measured as a function of temperature at 10, 24 and 70 GHz. Both conductivity and permittivity exhibited sharp changes at the β?α phase transition. The microwave conductivity of the β-phase was found to be insensitive to temperature changes and that of the α-phase has thermal activation energies lower than that of dc. The observed monotonic increasing conductivity, decreasing permittivity, together with thermal activation effects are indicative of hopping ionic transport.     

Intramolecular Hydrogen Bond and Internal Rotation of Aminogroup in Esters of Aminoacrylic Acids

The NMR ¹H and IR spectra of ethyl esters of two β-alkyl and β-aryl substituted of β-aminoacrylic acid have been measured. The results are evidence of the strong intramolecular hydrogen bond between amino group and carbonyl oxygen. The activation energy of about 20 kcal/mol was obtained for the internal rotation around C-N bond.     

Abnormal Li diffusion in β-LiGa by the formation of defect complex

The diffusion coefficients of Li in the NaTl-type Li intermetallic compound of β-LiGa have been measured by using a short-lived radioactive diffusion tracer. As the tracer, the α-emitting radioisotope of ⁸Li delivered as the energetic and pulsed beam from Tokai Radioactive Ion Accelerator Complex (TRIAC) was implanted into the β-LiGa compounds with the composition in the range of about 43 to 54 at.% Li. By analyzing the time-dependent yields of the α-particles measured according to the repetition cycle of the beam, the tracer diffusion coefficients were extracted over the wide range of Li composition. Abnormal composition-dependence of Li diffusion coefficients in β-LiGa was observed; the stoichiometric β-LiGa showed the highest diffusivity of Li. By referring to the composition-dependent diffusivity of Li in the iso-structural β-LiAl and β-LiIn, we could identify the abnormal diffusion of Li in very Li-poor composition of β-LiGa. The anomaly has been discussed qualitatively in terms of the formation of defect complex and the interaction between the constitutional defects.     

Zn掺杂β-Ga2O3薄膜的制备和特性研究（英文）

β-Ga2O3是一种宽带隙半导体材料,能带宽度Eg≈5.0eV,在光学和光电子学领域有广泛的应用.用射频磁控溅射方法在Si衬底和远紫外光学石英玻璃衬底制备了本征β-Ga2O3薄膜及Zn掺杂β-Ga2O3薄膜,用紫外-可见分光光度计、X射线衍射仪、荧光分光光度计对本征β-Ga2O3薄膜及Zn掺杂β-Ga2O3薄膜的光学透过、光学吸收、结构和光致发光进行了测量,研究了Zn掺杂和热退火对薄膜结构和光学性质的影响.退火后的β-Ga2O3薄膜为多晶结构,与本征β-Ga2O3薄膜相比,Zn掺杂β-Ga2O3薄膜的β-Ga2O3(111)衍射峰强度变小,结晶性变差,衍射峰位从35.69°减小至35.66°.退火后的Zn掺杂β-Ga2O3薄膜的光学带隙变窄,光学透过降低,光学吸收增强,出现了近边吸收,薄膜的紫外、蓝光及绿光发射增强.表明退火后Zn掺杂β-Ga2O3薄膜中的Zn原子被激活充当受主.     

真空蒸发法制备放射源

在β谱学的研究中,经常需要薄而均匀的放射源。为此目的,我们设计了一套真空蒸发制源装置,并用它制出了In¹¹⁴,Au¹⁹⁸和Sm¹⁵³的放射源。为了说明问题,我们分别用液滴蒸发和真空蒸发法制备了In¹¹⁴的放射源,用双磁镜和双聚焦β谱仪测量了它们的内转换能谱,并对它们的结果进行了比较。可以看到,真空蒸发法制备源的优点是明显的。此外,也给出了双聚焦β谱仪测量的Sm¹⁵³69.67千电子伏γ射线的K,L_Ⅰ,L_Ⅱ和L_Ⅲ转换电子线以及Au¹⁹⁸411.84千电子伏γ射线的K转换电子线。     

Thermopower of biomorphic silicon carbide

The thermopower coefficients of cubic bio-SiC, a high-porosity semiconductor with cellular pores prepared from the biocarbon template of white eucalyptus wood, and single-crystal β-SiC taken as a reference are measured in the temperature range 5–280 K. It is revealed that, in the low-temperature range, the samples are characterized by a thermopower contribution associated with the electron drag by phonons. The thermopower of the bio-SiC samples is measured both along and across the empty pore channels and is found to be anisotropic. Two models are proposed to account for the anisotropy of the thermopower in cubic bio-SiC.     

溶剂折射率对β-胡萝卜素拉曼散射截面的影响

以环己烷的1444 cm^-1拉曼线为内标,采用5145 nm激发光分别测量了β-胡萝卜素的C=C双键（1520 cm^-1）和C—C单键（1155 cm^-1）振动模式下在不同折射率溶剂中的拉曼散射截面,结果表明随溶剂的折射率增加β-胡萝卜素在两种振动模式下拉曼散射截面都增加.利用色散力和共振拉曼理论解释了在不同折射率溶剂中β-胡萝卜素散射截面的差异. 关键词： 拉曼散射截面 β-胡萝卜素 色散力 共振拉曼     

Thermal conductivity of high-porosity heavily doped biomorphic silicon carbide prepared from sapele wood biocarbon

The electrical resistivity and thermal conductivity of high-porosity (～52 vol %, channel-type pores) bio-SiC samples prepared from sapele wood biocarbon templates have been measured in the temperature range 5–300 K. An analysis has been made of the obtained results in comparison with the data for bio-SiC samples based on beech and eucalyptus, as well as for polycrystalline β-SiC. The conclusion has been drawn that the electrical resistivity and thermal conductivity of bio-SiC samples based on natural wood are typical of heavily doped polycrystalline β-SiC.     

Vibrational Spectra of a Linear Alternating L,D Hexapeptide with a Type II β-Turn Structure

Raman and infrared spectra of Boc-(D-aIle-L-Ile)₃-OMe (ILEU-6) and its N-deuterated derivative have been measured. Conformationally sensitive amide vibrations have been identified and compared with the observed and calculated frequencies of Pro-Leu-Gly-NH₂ which has a type II β-turn structure. The observed frequencies of ILEU-6 have also been compared with the normal mode calculations of a standard model type II β-turn structure and a good agreement has been found in these comparisons. The additional frequencies observed for this particular structure are assigned to the residues that are not involved in the β-turn.     

Positions of the Glycans in Molluscan Hemocyanin, Determined by Fluorescence Spectroscopy

Molluscan hemocyanins are glycoproteins with different quaternary and carbohydrate structures. It was suggested that the carbohydrate chains of some Hcs are involved in their antiviral and antitumor effect, as well in the organization of the quaternary structure of the molecules. Using a well-known complex for saccharide sensing, positions and access to the carbohydrate chains in the native hemocyanins from Rapana venosa (RvH) and Helix lucorum (HlH) and also their structural subunits (RvH1, RvH2 and β_cHlH) and functional units (FUs) were analysed by fluorescence spectroscopy and circular dichroism. Almost no effect was observed in the fluorescence emission after titration of the complex with native RvH and HlH due to lack of free hydroxyl groups which are buried in the didecameric form of the molecules. Titration with the structural subunits β_cHlH and RvH2, increasing of the emission indicates the presence of free hydroxyl groups compared to the native molecules. Complex titration with the structural subunit βc-HlH of H. lucorum Hcs leads to a 2.5 fold increase in fluorescence intensity. However, the highest emission was measured after titration of the complex with FU βcHlH-g. The result was explained by the structural model of β_cHlH-g showing the putative position of the glycans on the surface of the molecule. The results of the fluorescent measurements are in good correlation with those of the circular dichroism data, applied to analyse the effect of titration on the secondary structure of the native molecules and functional units. The results also support our previously made suggestion that the N-linked oligosaccharide trees are involved in the quaternary organization of molluscan Hcs.