N,N—二乙基二硫代氨基甲酸烯丙基酯（ADC）的NMR研究

对Ｎ，Ｎ－二乙基二硫代氨基甲酸烯丙基酯（ＡＤＣ）的＾１Ｈ ＮＭＲ谱，＾１３Ｃ ＮＭＲ谱及Ｈ－＾１Ｈ．＾１３Ｃ－＾１Ｈ化学位移相关谱测定结果进行了讨论。对＾１３Ｃ ＮＭＲ和＾１Ｈ ＮＭＲ谱峰作出了归属，并确认了ＡＤＣ的链结构。     

2,4—二硝基五环[4.3.0.0^2.5.0^3,8.0^4,7]壬烷^1H和^13C…

利用＾１Ｈ－＾１ＨＣＯＳＹ，＾１３Ｃ－＾１ＨＣＯＳＹ，＾１３Ｃ－＾１Ｈ远程ＣＯＳＹ以及选择性远程ＤＥＰＴ＾１３ＣＮＭＲ谱，对２，４－二硝基五环［４．３．０．０＾２．５，０＾３．８．０＾４，７］壬烷的＾１Ｈ和＾１３ＮＭＲ谱进行了完全的归属。     

单睛六甲基—N—（3—咪唑基—1）丙基酰胺钴啉酯高氯酸盐的合成

维生素Ｂ１２（ＶＢ１２）衍生物,二睛六甲基－Ｎ－（３－咪唑基－１）丙基酰胺钴啉酯３ｂ－３ｆ,在Ｎ２存在下,与乙酸作用,用含高氯酸钠的磷酸盐缓冲溶处理,环合得到了五个相应的钴啉环ｂ、ｃ、ｄ、ｅ和ｆ侧链氮原子与钴原子配位的单睛六甲基－Ｎ－（３－咪唑基－１）丙基酰胺钴啉酯高氯酸盐４ｂ－４ｆ。产物结构经ＵＶ／ＶＩＳ、＾１Ｈ－ＨＭＲ和＾１３Ｃ－ＮＭＲ分析确认。     

中药路路通化学成分的研究（I）：一种新的五环三萜的结构测定

从生药路路通分离得到２个齐墩果烷骨架的五环三萜类化合物。通过＾１３Ｃ ＮＭＲ，ＤＥＰＴ，＾１Ｈ ＮＭＲ，２Ｄ＾１Ｈ－＾１３Ｃ ＣＯＳＹ，２Ｄ＾１Ｈ－＾１Ｈ ＣＯＳＹ，ＩＲ，ＭＳ和元素分析阐明了它们的结构。（１）为２α，３β－二羟基－２３－去甲－齐墩果－４（２４），１２（１３）－二烯－２８－羧酸，（２）为２α，３β，２３－三羟基齐墩果－１２（１３）－烯－２８－羧酸，（１）未见献报道，（２）是首次从     

TS—1沸石合成过程中模板剂用量对钛进入骨架的影响

以ＴＰＡＢｒ为模板剂、ＮＨ３．Ｈ２Ｏ为碱源，水热条件下合成了ＴＳ－１沸石，采用ＸＲＤ、ＩＲ、ＵＶ－Ｖｉｓ、＾２９ＳｉＣＰＭＡＳＮＭＲ、＾２７ＡｌＣＭＡＳＮＭＲ、＾１３ＣＣＰＭＡＳＮＭＲ等表征手段详细研究了模板剂不同用量对钛进入骨架的影响。     

2—丙酰基—6—甲氧基萘合成过程中副产物的分离与表征

介绍了研究工业规模的萘普生生产过程，关键中间体２－丙酰基－６－甲氧基萘制备时，佛－克酰基化副产物１，６－二丙酰基－２－甲氧基萘的分离，并用＾１上ＮＭＲ，＾１３Ｃ ＮＭＲ，ＩＲ，元素分析，ＭＳ，＾１Ｈ－＾１３Ｃ二维谱表征。     

炔丙氧基不对称硫代磷酸酯硫逐—硫赶热力学重排反应…

Ｏ－芳基－Ｏ－甲基－Ｏ－炔丙基不对称硫代磷酸酯分别在苯、甲苯、对二甲苯溶剂中加热回流条件下，通过（３，３）硫逐－硫赶热力学重排反应，合成了一系列未见文献报道的Ｏ－芳基－Ｏ－甲基－Ｓ－累积二烯基不对称磷酸酯新化合物，其结构均得到ＩＲ、＾１Ｈ、ＮＭＲ、＾３１Ｐ ＮＭＲ、ＭＳ的证实。     

用^1H—NMR方法丙烯酸酯类与N—芳基取代甲基丙烯酰胺的共…

本文测定了一系列丙烯酸与Ｎ－芳基取代甲基丙烯酰安，，Ｎ－邻甲苯基甲基丙烯酰胺，Ｎ－对溴苯基甲基丙烯酰胺，Ｎ－对氯苯基甲基丙烯酰胺，Ｎ－对硝基苯基甲基丙烯酰胺，Ｎ－邻硝基苯基甲基丙烯酰胺，Ｎ－萘基甲基丙烯酰胺的共聚物的＾１Ｈ－ＮＭＲ谱。用＾１Ｈ－ＮＭＲ方法测定了共聚物的组成，估算了共聚体系中各单体的竞聚率，比较了各种单体的反应活性。     

1—苯甲酰基—4,4—二烷基哌嗪溴化物的^1H和^13C NMR研究

报道了七种１－苯甲酰基－４,４－二烷基哌嗪溴化物的＾１Ｈ和＾１３Ｃ ＮＭＲ,并对全部谱峰进行了归属,初步讨论了影响＾１Ｈ ＮＭＲ,＾１３Ｃ ＮＭＲ化学位移的因素,结果发现：１）受苯甲酰基和Ｒ＾１,Ｒ＾２的影响,当Ｒ＾１＝Ｒ＾２时,ｂ位质子表现为强度相等、对称的两组峰;当Ｒ＾１≠Ｒ＾２时,ｂ位质子不再表现为对称相等的两组峰。２）化合物１（Ｒ＾１＝Ｒ＾２＝ＣＨ３）在－６０℃时,两个甲基碳仍表现为相同的     

用NMR波谱鉴定烷氧钇单体合成物的结构

介绍如何利用＾１Ｈ－ＮＭＲ,＾１Ｈ－＾１Ｈ相关、＾１Ｈ－＾１Ｈ耦合和ＤＥＰＴ谱对烷氧钇单体合成物的结构进行鉴定。     

羟丙基羧甲基纤维素工艺及反应机理研究

研究碱纤维素分别经环氧丙烷和氯乙酸醚化制备羟丙基羧甲基纤维素(HPCMC)醚(摩尔取代度0.22左右,羧甲基取代度0.70～0.85)的方法,探讨了HPCMC的工艺条件和反应机理.正交试验的结果表明,随着HPCMC取代度(DS)和羟丙基摩尔取代度(MS)的增加,该复合醚的水溶液粘度和耐酸性提高.研究还发现,用表氯醇低度交联的HPCMC,其耐酸性有进一步的提高.所制备的产品可用于食品、饮料、涂料和钻井泥浆等方面.     

Insights on cellulose hydrolysis in the porous structure of biomass particles using the lattice Boltzmann method

Lignocellulose biomass has been recognized as one of the most promising sources of low-cost and renewable biofuels, and its conversion into alternative fuels and valuable platform molecules has attracted widespread attention. The porous solid residue from lignocellulose biomass, which was pretreated by steam-stripping, is catalyzed by dilute sulfuric acid to form levulinic acid (LA). The process includes porous media diffusion, multicomponent reactive transport, liquid-solid interface reaction, and cellulose dissolution. Understanding the interactions between these complex physicochemical processes is the basis for optimizing the performance of the hydrolysis reaction. In this study, a porous reaction transport model based on the lattice Boltzmann method (LBM) was established to simulate the conversion of cellulose to LA which was catalyzed by dilute acid. The simulation results were compared with the existing experimental results to verify the accuracy of the model. The simulation results showed that temperature has a significant effect on hydrolysis and the highest carbon yield was obtained at 180 °C. Without considering the lignin reaction, the higher the sulfuric acid concentration, the better is the hydrolysis efficiency in the range of 4% – 8%. The influence of cellulose content and steam-stripping the residue porosity on the dissolution rate of cellulose was also evaluated. The average dissolution rate of cellulose is the highest within 75 min, when the porosity is 0.7 and the cellulose content is 50%.     

热熔挤出法制备不同载体系统布洛芬缓释制剂

采用热熔挤出法,选用聚氧化乙烯（PEO）、乙基纤维素（EC）、羟丙甲基纤维素（HPMC）为载体制备了布洛芬缓释制剂,并比较其释药速率。在三种载体中添加不同辅料,比较对药物释放的调节作用;应用差式扫描量热法、电镜法对热熔挤出制剂与相应压制片剂进行比较,并与释放曲线进行比照。结果表明,三种载体制备的热熔挤出制剂,均对药物有缓释作用,其中药物从EC载体中释放最慢。在不同载体系统中添加相同辅料微晶纤维素（MCC）时,对药物的释放有不同调节作用,在PEO和HPMC系统中,药物12h时释放度提高近20%,且HPMC/MCC载体系统可达到较理想的药物释放;但MCC对EC系统的药物释放影响不大。在同一PEO载体系统中添加不同辅料时对释药速率产生的影响也不同;由差式扫描量热图谱、电镜、释放曲线结果,推测药物在热熔挤出制剂中的分散程度比在压片制剂中高。     

多潘立酮-卡波姆胃内黏附微丸的制备及体外评价

为制备多潘立酮胃内黏附型缓释微丸,并对其体外释放行为及体外的黏附性能进行考察,以卡波姆、羟丙基纤维素和PVP为主要黏附材料,以30%(质量分数)的NaCl水溶液作为润湿剂制备软材,采用挤出-滚圆法制备微丸.以释放度和体外的黏附性为评价指标,采用正交设计,优选出最佳处方,并进行最佳处方的验证,卡波姆、羟丙基纤维素及PVP...     

Regulation of cellulose synthesis in Acetobacter xylinum by cyclic diguanylic acid

Cellulose is the most abundant renewable carbon resource on earth and is an indispensable raw material for the wood, paper, and textile industries. A model system to study the mechanism of cellulose biogenesis is the bacterium Acetobacter xylinum which produces pure cellulose as an extracellular product. It was from this organism that in vitro preparations which possessed high levels of cellulose synthase activity were first obtained in both membranous and soluble forms. We recently demonstrated that this activity is subject to a complex multi-component regulatory system, in which the synthase is directly affected by an unusual cyclic nucleotide activator enzymatically formed from GTP, and indirectly by a Ca (2+) -sensitive phosphodiesterase which degrades the activator. The cellulose synthase activator (CSA) has now been identified as bis-(3' 5')-cyclic diguanylic acid (5'G3'p5'G3'p) on the basis of mass spectroscopic data, nuclear magnetic resonance analysis and comparison with chemically synthesized material. We also report here on intermediary steps in the synthesis and degradation of this novel circular dinucleotide, which have been integrated into a model for the regulation of cellulose synthesis.     

Determination of Carboxyl Group on Fabric by Acid - base Titration

Polycarboxylic acids have been widely researched as non-formaldehyde DP finishes since late 1980s. However, there has no satisfied wet chemical method for quantifi-cation the carboxylic groups or the esterlinkages on fab-ric, which is important in investigation some basic as-pects of the esterification between polycarboxylic acids and cellulose. In this paper, the wet chemical analysis method, Ca(AC)2 back - titration, had been established to determinate the COOH on fabric. The reliability of this method had also been proved.     

磷钼杂多酸-奎宁体系共振光散射测定微量磷

在0.25 mol/L H2SO4介质中,PO43-,MoO42-反应生成磷钼杂多酸,它与阳离子染料奎宁可形成稳定的离子缔合物,并在398.0 nm处产生灵敏的共振光散射(RLS)峰,磷质量浓度在1～200 μg/L内与共振光散射强度成良好线性关系,对磷的检出限(3σ)为0.5 μg/L.由此建立了一种测定微量磷的共振光散射分析方法.该方法具有操作简便、灵敏度高、选择性好的优点.     

3-胺基-N-(9′-癸烯基)水杨酰胺的合成研究(Ⅱ)

用改进的方法,以十一烯酸和硝基水杨酸为原料,经史米特(Schmidt)重排,还原,酯化,缩合反应制备新化合物3-胺基-N-(9′-癸烯基)水杨酰胺。产品结构经IR,~1H NMR和MS鉴定。     

除虫菊组织培养研究

本文成功地进行了除虫菊的试管繁殖。探索出除虫菊的快速繁殖方法，实验结果表明：在ＭＳ附加２ｍｇ／１ＢＡ及０．１ｍｇ／ＬＮＡＡ中，下胚轴能够很好地诱导芽的产物，幼芽地此培养基中能够极快地增殖。     

祛痰止咳颗粒指纹图谱研究

 采用HPLC法构建了祛痰止咳颗粒指纹图谱,色谱条件为Elite Hypersil BDS（4.6 mm×250 mm,5 μm）色谱柱,以甲醇(A)-0.15%(〖WTBX〗φ〖WTBZ〗)冰醋酸溶液(B)为流动相,线性梯度洗脱A（15%→75%）,流速1.0 mL/min,柱温25 ℃,检测波长260 nm。该指纹图谱中,确定了19个共有峰,并采用对照品对照法及HPLC-ESI-MS/MS联用技术鉴定出10个黄酮类化合物。构建的指纹图谱,操作简便、准确可靠、重复性较好,为祛痰止咳颗粒质量控制提供了科学依据。