紫外分光光度法分析金银花及其制剂银黄口服液中绿原酸

目的:建立金银花及其制剂中绿原酸含量的检测方法.方法:采用紫外分光光度法.检测波长327nm.结果:绿原酸的浓度为50-10μg/mL时,线性关系良好,回归方程:A=0.0376C-0.0059,r=0.9994(n=5).平均回收率为98.7%,RSD为1.58%.结论:该方法可用于控制金银花及其制剂银黄口服液的质量.     

HPLC法测定复方金银花颗粒中绿原酸的含量

目的：建立控制复方金银花颗粒质量的方法。方法：采用HPLC法。色谱柱Zorbax RP-C18柱（150mm×4.6mm,5μm）;流动相：乙腈：0.3%磷酸=15：85（v/v）;流速：1mL/min;波长300nm。结果：复方金银花颗粒中绿原酸含量为0.524mg/袋。结论：该方法准确可靠,可用于控制复方金银花颗粒的质量。     

八角茴香抑菌活性试验研究

目的：考察中药八角的抑菌活性效果。方法：采用最低抑菌浓度（MIC）测定方法和抑菌活性试验。结果：不同产地的八角茴香对痢疾杆菌、金黄色葡萄球菌、白喉杆菌、伤寒杆菌均有较强的抑制作用,广西产地八角茴香对痢疾杆菌、金黄色葡萄球菌、白喉杆菌、伤寒杆菌的MIC分别为15.625g/mL、31.25g/mL、125g/mL、62.5g/mL。其抑菌活性为中敏。结论：中药八角茴香有较强的抑菌效果。     

高效液相色谱法测定金银花中芦丁的含量

采用HPLC法测定金银花中芦丁的含量。色谱条件为:Zorbax RP-C18柱(150mm×4.6mm,5μm);流动相:乙腈:0.3%磷酸=15:85(v/v);流速:0.6mL/min;波长300nm。结果芦丁标准工作曲线:Y=42574X 91.57,r=0.9995。线性范围为:0.00084μg/mL-0.00021μg/mL,平均回收率为97.7%,RSD=1.93%。     

通脉胶囊中葛根素和丹参酮的含量测定

目的:建立控制能脉胶囊质量的方法.方法:用高效液相色谱法(HPLC).采用色谱柱Zorbax RP-C18柱(150mm×4.6mm,5μm):流动相:甲醇:水=75:25(v/v):流速:0.8mL/min:波长254nm:柱温:25℃.结果:通脉胶囊中葛根素和丹参酮分离良好,葛根素线性范围是22.5μg/mL至2.25μg/mL,r=0.9997.丹参酮线性范围为16.5μg/mL至165μg/mL,r=0.9998.结论;该方法准确可靠,可用于控制通脉胶囊的质量.     

HPLC同时测定通脉胶囊中葛根素和丹参酮的含量

目的:建立控制通脉胶囊质量的方法.方法:用高效液相色谱法(HPLC).采用色谱梓ZorbaxRP-C18柱(150mm×4.6mm,5μm);流动相:甲醇:水=75:25(v/v);流速:0.8mL/min;波长254nm;柱温:25℃.结果:通脉胶囊中葛根素和丹参酮分离良好.葛根索线性范围是22.5μg/mL-225μg/mL,r=0.9997.丹参酮线性范围为16.5tμg/mL-165μg/mL,r=0.9998.结论:该方法准确可靠,可用于控制通脉胶囊的质量.     

HPLC法测定复方吴茱萸碱纳米乳中吴茱萸碱的含量

目的:建立HPLC法测定复方吴茱萸碱纳米乳制剂中吴茱萸碱含量的方法。方法:采用HPLC法在225 nm波长处测定峰面积,测定复方吴茱萸碱纳米乳中吴茱萸碱的含量。结果:表明吴茱萸碱在225 nm处有最大吸收,浓度在0.52μg·mL至16.64μg·mL-1时与峰面积呈良好的线性关系,回归方程为:A=214.3C-5.943,r=0.9997(n=6);平均回收率为99.31%,RSD为0.74%,符合测定的要求;日内及日间精密度的RSD均小于1%(n=5)。结论:本方法准确度高、专属性好,可用于纳米乳制剂中吴茱萸碱含量的测定。     

He-Ne激光与紫外复合诱变选育林可霉素高产菌株

对林肯链霉菌原生质体进行He-Ne激光-紫外复合诱变,结果表明,复合诱变对该菌的原生质体有明显的致死作用.将诱变后的原生质体涂布含林可霉素浓度为15000μg/mL的再生平板上,可获得抗性基因突变株.经筛选,得到一株遗传性状稳定的高产菌株SL-98-2#-8,其摇瓶效价为3110μg/mL,比出发菌株SL-98-2 #(2210μg/mL)提高了40.7%.     

复方苦槿霜抗真菌作用的实验研究

目的 :探讨和验证自拟中药方剂复方苦槿霜治疗皮肤浅部真菌病的抑菌试验及药理药效。方法 :将 5 %、10 %、2 0 %复方苦槿霜对常见皮肤致病真菌进行抑菌试验及药效学实验。结果 :10 %、2 0 %复方苦槿霜抑菌效果相当 ,明显优于 5 %复方苦槿霜的抑菌效果 (P <0 .0 5 ) ,10 %、2 0 %复方苦槿霜抑菌效果与达克宁相当 (P >0 .0 5 ) ,并对皮肤常见致病真菌都有抑制作用。药效学试验结果 :复方苦槿霜临床日用量是安全的。无皮肤刺激及过敏反应。结论 :本研究为临床应用纯中药制剂治疗皮肤浅部真菌病提供了科学依据 ,证实了复方苦槿霜的科学性及可行性。     

HPLC法测定藿香正气颗粒中的厚朴酚

目的:建立厚朴制剂藿香正气颗粒中厚朴酚含量测定的HPLC法。方法:采用甲醇溶解样品超声制备供试液;HPLC色谱条件为:Zorbax RP-C18色诸柱(150mm×4.6mm,5μm);流动相:甲醇-水(80:20,v/v);流速:1.0mL/min;检测波长:294 nm。结果:厚朴酚的线性范围是0.02至4μg/mL,其线性相关系数R=0.9992,藿香正气颗粒中厚朴酚的含量为0.273mg/袋,其厚朴酚加样回收率为99.2%至101.4%,RSD为1.73%。结论:此方法快速简便,可用于评价藿香正气颗粒的质量。     

寓教于乐寓教于思

本文介绍了数字电子技术基础课程教学中,改革教学方法、激发学生学习兴趣,诱导学生积极思维,将灌输知识的结论性教育转变为启发思维的过程性教育,将纪律严明的课堂气氛转变为生动活泼、主动探索课堂气氛所做的一些探索。     

Multiple-access channels with memory with and without framesynchronism

The capacity region of frame-synchronous and frame-asynchronous, discrete, two-user multiple-access channels with finite memory is obtained. Frame synchronism refers to the ability of the transmitters to send their code words in unison. The absence of frame synchronism in memoryless multiple-access channels is known to result in the removal of the convex hull operation from the expression of the capacity region. It is shown that when the channel has memory, frame asynchronism rules out nonstationary inputs to achieve any point in the capacity region, thereby allowing only coding strategies that involve cooperation in the frequency domain but not in the time domain. This restriction drastically reduces the capacity region of some multiple-access channels with memory, and in particular the total capacity of the channel, which is invariant to frame asynchronism for memoryless channels     

随机参数反射面天线机电集成稳健优化设计

针对反射面天线风荷与结构参数具有随机性的特点,提出了随机因素下机电集成设计方法.首先,导出了随机因素下反射面天线电磁场与位移场的场耦合关系式.其次,提出了基于新关系式的机电集成稳健优化设计模型,给出了求解的策略与方法.最后,将所提出的理论与方法应用于某8m与40m天线中,得到了满意的结果.     

Blind Equalization with Differential Detection for Channels with ISI and Fading

Schemes which combine differential detection and blind equalization, to eliminate the need for phase recovery and training sequence, are studied. Decision feedback is also added in an attempt to equalize null and fading channels. Using Godard and Modified Constant Modulus Algorithms (MCMA) new systems are proposed by combining coherent and noncoherent detection with these two algorithms. For MCMA, as it can track the carrier, neither differential detection nor a PLL is required. Contrarily, Godard Algorithm needs either differential detection or a PLL to correct phase error. While the proposed system combining differential detection, blind equalization and decision feedback can indeed, in principle, equalize different channels, the robustness of the system is compromised.     

Capsosomes with Multilayered Subcompartments: Assembly and Loading with Hydrophobic Cargo

Therapeutic artificial cells or organelles are nanoengineered vehicles that are expected to substitute for missing or lost cellular function. The creation of capsosomes, polymer carrier capsules containing liposomal subcompartments, is a promising approach towards constructing such therapeutic devices using the layer‐by‐layer assembly method. Herein, the assembly of intact, nonaggregated capsosomes containing multiple liposome layers is reported. It is also further demonstrated that thiocoraline, a hydrophobic model peptide with antitumor activity, can be efficiently loaded into the membrane of the liposomal subcompartments of the capsosomes. Cell viability assays verify the activity of the trapped antitumor cargo. It is also shown that pristine capsosomes do not display inherent cytotoxic effects. The ability to tune the number of liposome layers and hence the drug loading in capsosomes as well as their noncytotoxicity provide new opportunities for the creation of therapeutic artificial cells and organelles.     

Playing with fire and fibers

Annealing optical fibers has made the optical-fiber current sensor practical for monitoring and diagnostics by utility companies. To produce an annealed-fiber coil for this application, the annealing process must be held within time and temperature bounds or devitrification and OH absorption will degrade coil performance. Annealed-fiber devitrification can produce other useful fiber components, such as a fiber depolarizer and increased photosensitivity for FBG production     

嵌入式系统设计与应用

叙述了嵌入式系统的基本分类和主要特点在显示系统设计中,采用的是嵌入式计算机DIMM-PC模块.分析了DIMM-PC CPU模块的功能特性和接口规范,通过比较PC104模块与DIMM-PC模块的特点,指出了采用DIMM-PC模块的优越性.     

Performance of M-PSK with GSC and EGC with Gaussian weighting errors

Using a moment-generating function (MGF)-based approach, we study the performance of M-ary phase-shift keying (M-PSK) with generalized selection combining (GSC) and equal gain combining (EGC) in fading channels (including Rayleigh, Rician, Nakagami-m, and Nakagami-q fading) with independent and identically distributed (i.i.d) branches. Analytical expressions for the error and outage probabilities, the signal-to-noise-ratio (SNR) statistics, and the channel capacity of M-PSK diversity receivers are derived, taking into account the effects of Gaussian weighting errors and all relevant system and channel parameters. Unlike the case of perfect channel-state information (CSI), the outage probability for the case of imperfect channel estimation (ICE) is not only a function of the normalized SNR with respect to the SNR threshold, but also a function of the operating SNR itself. The SNR loss of the M-PSK GSC and EGC receivers due to ICE and the relation between the receiver input and output SNRs for ICE are derived. Our results show that, even with ICE, GSC and EGC are effective in improving the output SNR and significantly reduce the error floor and the channel-capacity loss caused by ICE.     

车载FSK信号的实时高精度检测与DSP实现

本文基于16位定点运算精度的TMS320C50 DSP芯片,提出了一种通过频谱分析实现时高精度检测FSK信号的方法,并从理论上对主要技术给予了详细的论述,文章最后给出了具体硬件实现及部分实验结果。