食品工业清洁生产测评技术与方法研究--废水中氨氮含量的测定

对肉类加工废水中的氨氮(NH3-N)含量的测评技术和方法进行了研究.采用纳氏试剂分光光度法测定了不同废水中的NH3-N含量.结果表明,屠宰和熟食加工产生的废水、熟食加工产生废水和混合废水经处理后的水样中氨氮含量分别为255mg/L、8.24mg/L、和13.4mg/L,平均回收率为93.0%,平均相对标准偏差为2.19%.所得数据可靠、准确,其方法快速、可行.探讨的测评废水中氨氮的方法,将为企业实施内部监测提供依据,为我国制定清洁生产测评标准提供参考.     

锗-2-羟基-3-甲氧基苯基荧光酮-溴化十六烷基三甲基铵(CTMAB)体系的分光光度法

在阳离子表面活性剂 CTMAB存在下 ,硫酸介质中 ,2 -羟基 - 3-甲氧基苯基荧光酮与 Ge( )显色反应 ,形成红色的络合物 ,其最大吸收波长为 5 0 5 .5 nm,表观摩尔吸光系数为 1.5× 10 5L· mol-1·cm-1,锗量在 0— 13μg/ 2 5 m L范围内符合比耳定律 ,分光光度法测定锗 ,很多离子不干扰测定。方法具有很高的灵敏度 ,直接用于锅炉烟尘中微量锗的测定 ,结果令人满意     

LiF晶体中F3^＋—F2混合色心激光器

本文报道了室温下LiF晶体中F_3~+-F_2混合色心激光器.利用一块晶体和单一泵光,输出激光波长范围从510～580nm、640～710nm.总带宽140nm.     

Cr3+：MgAl2O4晶体EPR参量及其电子精细光谱的研究

考虑了SS(Spin-Spin)作用和SOO(Spin-Other-Orbit)作用，采用完全对角化方法，结合自旋Hamiltonian理论，研究了Cr³⁺∶MgAl₂O₄晶体EPR参量及其吸收光谱，理论与实验符合甚好. 在此基础上，进一步研究了⁴A₂(3d³)离子EPR参量的微观起源. 研究表明，EPR参量起源于四种微观机制：(1) SO(Spin-Orbit) 耦合机制；(2) SS耦合机制；(3)SOO耦合机制；(4) SO～SS～SOO总联合作用机制. 在这些机制中，SO机制是最主要的.     

波段三维ESR成像系统的研制（Ⅴ）——灵敏度与分辨率实验及系统总性能指标

实验确定了自行研制的L波段三维电子自旋共振成像（3D-ESRI）系统的检测灵敏度及成像分辨率指标. 用Tempo水溶液模型测量灵敏度结果表明： 样品体积为10 mm, 高30 mm，测量浓度1×10^-4 mol/L水溶液的信噪比为S/N=4∶1；加梯度磁场后，样品浓度需>5×10^-4 mol/L，样品体积为19 mm, 高30 mm时，获得的投影谱的信噪比可满足图像重建的需要. 用DPPH固体样品确定的成像分辨率结果<1 mm. 文中还对ESRI系统的
各项总体性能做了归纳总结.     

Cl/HN3/I2全气相化学激光体系的化学动力学模拟计算

 对Cl/HN₃/I₂产生NCl(a)/I激光的过程进行了化学动力学计算，主要考察了Cl,HN₃和I₂的初始粒子数密度及其配比对小信号增益系数的影响。结果发现,当温度为400K, 初始Cl粒子数密度为1×10¹⁵，1×10¹⁶和1×10¹⁷cm^-3时,小信号增益系数分别达到1.6×10^-4,1.1×10^-3和1.1×10^-2cm^-1，获得最佳小信号增益系数的HN₃和I₂的初始粒子数密度分别为初始Cl粒子数密度的1～2倍和2%～4%。同时，对Cl，HN₃和I₂配比对小信号增益系数和增益持续时间的影响进行了讨论。     

Root determination by use of Padé approximants

In this paper we describe a new technique for generating iteration formulas — of arbitrary order — for determining a zero (assumed simple) of a functionf, assumed analytic in a region containing the zero. The 1/p Padé Approximant (p0) to the functiong(t)f(z) is formed wherez=w+t, using the Taylor series forf at the pointw, an approxination to the zero off. The value oft for which the 1/p Padé Approximant vanishes provides the basis of iteration formulas of orderp+2.Some known iteration formulas, e.g., Newton-Raphson's, Halley's and Kiss's of order of convergence two, three and four, are directly obtained by settingp=0,1 and 2, respectively.     

Orientation-reversing involutions on handlebodies

The observation that the quotient orbifold of an orientation- reversing involution on a 3-dimensional handlebody has the structure of a compression body leads to a strong classification theorem, and general structure theorems. The structure theorems decompose the action along invariant discs into actions on handlebodies which preserve the -fibers of some -bundle structure. As applications, various results of R. Nelson are proved without restrictive hypotheses.

     

3He-rich solar flares

A new subgroup of³He rich solar flares is found on reanalysing the global data.³He/H ratio as a function of maximum proton flux at an energy of about 10 MeV shows a break-up of the data into two groups. The first group follows the anticorrelation of³He/H ratio with the proton flux, as expected in the plasma process acceleration models. But the second group has a constant³He/H ratio as a function of maximum proton flux. This is not in conformity with the plasma process models. But this is expected in models where the nuclear spallation reactions are responsible for the production of³He. It is also found that the same break-up into two distinct groups follows if one plots the location of the flares in the solar disc. The first group is more or less confined to the west limb of the Sun, whereas the second group is more widely spread out across the solar disk. Visiting Professor, Tata Institute of Fundamental Research, Bombay, August–September, 1983.     

三硼酸铯和硼酸铯锂晶体的晶格振动光谱研究

本文对新型非线性光学晶体三硼酸铯（ＣｓＢ３Ｏ５∶ＣＢＯ）和硼酸铯锂（ＣｓＬｉＢ６Ｏ１０∶ＣＬＢＯ）进行了晶格振动光谱研究。首先对两种晶体的基本晶格振动模进行了对称性分类,记录了两种晶体低温下的拉曼光谱和室温下的红外反射光谱,对晶体的晶格振动模进行了认定,将振动模归属于平面六元环（Ｂ３Ｏ６）和四面体（ＢＯ４）。然后比较了ＣＢＯ,ＣＬＢＯ和ＬＢＯ（ＬｉＢ３Ｏ５）三种晶体的晶格振动光谱,讨论了阳离子对振动光谱的影响。另外,还讨论了硼酸盐晶体晶格振动模ＬＯ ＴＯ分裂的大小与晶体非线性光学系数之间的关系。