雪莲果叶提取物降血糖口含片制备工艺研究

以雪莲果叶提取物的浸膏粉为主药,通过对比实验选择合适的辅料、配方及生产工艺制备雪莲果叶提取物降血糖含片,并对产品进行质量分析。研究结果表明,最佳的配方组合为:浸膏干粉50%、硬脂酸镁4‰、1∶1的甘露醇乳糖混合物48%、8%的淀粉浆适量、薄荷脑适量;最佳的工艺条件为:16目筛制粒,55℃干燥20 m in,16与18目筛整粒。在此配方及工艺条件下生产的产品各项指标均符合药典要求。     

清瘟败毒饮颗粒剂处方设计和制备工艺研究

目的：对名古方“清瘟败毒饮”颗粒剂处方制备工艺进行研究,为实际生产提供参考。方法：实验选取样品颗粒剂的性状、成型性、休止角、吸湿性、溶化性等指标,建立量化评分标准,依次考察乙醇浓度、辅料种类、辅料用量的最佳水平。结果：采用自制浸膏为原料药,以93%乙醇为润湿剂,乳糖为赋形剂（用量为处方总量的30%）制成的清瘟败毒颗粒剂,其各项理化指标均符合中国药典要求。结论：本研究筛选出的制剂工艺合理,重现性好;所制颗粒剂质量稳定,可为实际生产提供参考。     

红枣多糖提取工艺优化及颗粒剂的研制

对红枣中多糖提取工艺优化及辅料筛选,研制出红枣多糖颗粒剂。红枣多糖提取采用水提醇沉法,以温度,料液比和提取时间三个因素设置正交试验,选出最佳提取条件是水浴温度80℃;料液比1:10;提取时间2 h,提取率为3.37%。红枣多糖颗粒剂的辅料筛选以成型率和吸湿率为评价指标选出颗粒剂制备配比为原料药：淀粉：乳糖=1:2:1,并以湿法制粒制得红枣多糖颗粒。     

乳糖糖苷表面活性剂的合成与性能研究

以乳糖、乙二醇、高碳醇为原料,采用转糖苷法合成了乳糖糖苷表面活性剂,用正交及单因素实验探讨了合成乳糖糖苷的最佳工艺条件,得到的最佳工艺条件为:反应温度110℃,反应时间4 h,m(乳糖)∶m(对甲苯磺酸)∶m(十二烷基苯磺酸)∶m(乙二醇)∶m(高碳醇)=1∶0.013∶0.03∶4.9∶1.2,在该条件下糖苷产率为129.7%,糖转化率为98.37%。对所得产品进行FTIR、GC-MS和表面张力等性能分析。结果表明,乳糖能够合成糖苷类表面活性剂。     

光皮木瓜多糖提取工艺的研究

以当年产新鲜光皮木瓜为原料,通过热水浸提法提取光皮木瓜多糖。考察了浸提时间、浸提温度、料水比、光皮木瓜干粉粒径等因素对多糖提取率的影响,并通过正交实验对浸提工艺参数进行了优化。结果表明,热水浸提法提取光皮木瓜多糖的最佳工艺条件为：浸提温度90℃,浸提时间6h,料水比1：70,光皮木瓜干粉粒径120目。在此条件下3次提取所得光皮木瓜粗多糖的平均提取率为12．33％,纯化后平均产率为9．1％。     

棉籽中棉酚粗提物颗粒剂的成型工艺优选

目的:优选棉酚粗提物颗粒剂成型条件。方法:分别以颗粒剂外观、成型性、水分含量、流动性、堆密度和溶化性作为综合指标,考察浸膏粉与辅料配比,粘合剂的类型,粘合剂的用量对棉酚粗提取成型条件的影响。结果:最佳成型工艺条件为浸膏粉与辅料(可溶性淀粉:微晶纤维素:甘露醇)比为1∶0.2∶0.1∶0.1,粘合剂为甲基纤维素,粘合剂用量为10%。结论:该颗粒剂外观良好,吸湿性小,流动性和溶化性好、水分含量合格,优选的成型工艺简单、方便、可行,适合工业化生产。     

乳糖-间苯二酚树脂胶粘剂的合成

以乳糖和间苯二酚为原料成功合成了绿色环保型酚醛树脂粘合剂；并用正交实验法获得了该树脂合成的最佳反应条件及固化条件：浓盐酸3mL(相当于总质量的2．1%),n(乳糖)：n(间苯二酚)=4．5,催化剂无水硫酸铜质量2．1g(相当于总质量的1．3%),硝酸铵质量13g(相当于总质量的7．8%),反应时间4h,固化温度100℃左右。     

马铃薯干粉浓醪发酵中液化工艺的研究与优化

以马铃薯干粉为原料进行酒精浓醪发1：2．2酵,对液化过程中的条件进行了研究和优化,得出最佳的液化条件为：液化pH值5．0～6．0;液化酶用量为10U／g马铃薯粉;温度90℃;料水比为1：2．2;液化时间为1h,在此条件下,液化醪还原糖含量达到14％～15％,为后续的糖化和浓醪发酵奠定基础。     

纳滤技术回收乳制品废水中乳糖的研究

以回收乳制品废水中的乳糖和再生废水为目的,研究了纳滤膜法回收废水中乳糖的工艺,系统地讨论了操作压力、进料流量、浓缩比等因素对回收率和对COD去除率的影响。在本实验条件下,纳滤膜法回收乳制品废水中乳糖的最佳操作压力为1.0 MPa,进料流量为28 L/min。在此最佳操作压力和进料流量下,废水中乳糖的回收率为100%。而纳滤膜处理后乳制品废水的各项水质指标也达到了再生水的水质标准。     

牛初乳中唾液酸乳糖与乳糖的色谱分离

通过动态吸附和解吸附研究,从5种色谱填料中筛选出适合唾液酸乳糖与乳糖分离的色谱树脂,建立了唾液酸乳糖和乳糖的色谱分离技术,考察了径高比、洗脱速度、柱温、上样浓度等色谱条件对分离度和回收率的影响,确定了最佳色谱分离条件.结果表明,树脂QY-Z001可高效分离唾液酸乳糖和乳糖,最佳分离条件为径高比1:35、温度55℃、流速1.0 m L/min.、进样浓度100 g/L.该条件下唾液酸乳糖与乳糖分离度可达0.96,唾液酸乳糖含量由6.8%提高至84.6%,回收率为76.9%.     

喷雾造粒ZrO2粉料坯体性能的研究

以喷雾造粒ＺｒＯ２粉料为研究对象,通过对粉料的压力－密度曲线及坯体的ＳＥＭ显微结构分析,发现喷雾造粒粉料的粒度分布对坯体密度的影响较小;颗粒强度的大小是获得均匀的坯体结构的关键,颗粒的强度与其大小及环境湿度有关,因此颗粒适当的增塑及去除大颗粒均有利于坯体显微结构的改善。     

Evaluation of Flavor Release From Spray-Dried Powder by Ramping with Dynamic Vapor Sorption–Gas Chromatography

The ramping method for humidity at constant temperature was used to evaluate the release of D-limonene from spray-dried powder using a handmade dynamic vapor sorption (DVS) instrument. The release fluxes of D-limonene from spray-dried powder at two different liquid feed temperatures, 40 and 80°C, were used to evaluate the flavor release properties of spray-dried powder. The flavor fluxes for 40°C of liquid feed temperature were faster than those for 80°C over the whole humidity range.     

Moisture Sorption Isotherms and Storage Stability of Spray-Dried Yogurt Powder

Moisture adsorption isotherms of spray-dried yogurt powder were determined at 10, 25, and 40°C using the standard, static-gravimetric method. Experimental data were fitted to five mathematical models (Guggenheim-Anderson-de Boer [GAB], Brunauer-Emmett-Teller [BET], Halsey, modified Oswin, and modified Henderson). A nonlinear regression analysis method was used to evaluate the constants of the sorption equations. The shelf-life of yogurt powder was predicted based on the relationship between permeability coefficient of the packaging material and moisture adsorbed by the powder determined by the GAB equation. Furthermore, the storage stability of spray-dried yogurt powder in terms of quality parameters including moisture content, water activity, color change, and thiobarbituric acid (TBA) value was studied in aluminum laminated polyethylene (ALPE) pouches under storage conditions of 25°C and 50% relative humidity (RH).     

Effect of Relative Humidity on the Viscoelastic and Mechanical Properties of Spray-Dried Powder Compacts

Spray-dried powder compacts exhibit viscoelastic properties such as stress relaxation, creep, and delayed elastic strain. This behavior is attributed to the organic binder, which forms bridges between the particles in spray-dried granules, thereby affecting their deformation characteristics. The viscosity and distribution of the binder within the powder compact can affect its mechanical and viscoelastic properties. In this study, the powder was conditioned at different ambient relative humidity (RH) levels, to vary the binder viscosity. Load deformation, stress relaxation, fracture strength, and fracture toughness behavior of ferrite powder compacts were studied as a function of ambient RH both before and after compaction. The loading rate was found to significantly affect the time-dependent response, and the relaxation times decreased at high humidity levels during compaction. It is proposed that increasing the humidity level during compaction increases the number of particle–particle contacts. This simple mechanism of binder redistribution led to slower relaxation times, increases in fracture strength, and elastic modulus of the green bodies, without significantly altering the fracture toughness when powders were compacted at high humidity to a given density.     

A Comparison of Compacting and Caking Behavior of Carbonate-Based Washing Powders

Two types of sodium carbonate powder produced by spray drying (SD) and dry neutralization (DN) were studied for their compaction properties using a uniaxial compression tester. A comparison was also made with Persil washing powder. Dry neutralized sodium carbonate showed greater resistance to compression and also produced a weaker compact when compressed to 100 kPa. Spray-dried sodium carbonate had an absence of fine particles but compacted easily. Differential scanning calorimetry (DSC) showed that both types of powder were predominantly amorphous in nature. Moisture sorption measurements showed that both powders behaved in a similar way below 50% relative humidity (RH). However, dry neutralized sodium carbonate had a high moisture affinity above this RH. Particle structures were also examined using scanning electron microscopy, showing the heterogeneous interior of the spray-dried particles.     

Stress Transmission During the Compaction of a Spray-Dried Alumina Powder in a Steel Die

Stress transmission through the compact, die wall friction, and the radial/axial stress ratio were investigated using a spray-dried alumina powder containing 2.3% polyvinyl alcohol binder, stored at 15, 55, or 92% rh, and an unlubricated/lubricated steel die for pressing. Stress transmission was enhanced by lubricating the die and decreasing the thickness/ diameter of the compact. Increasing the punch velocity in the range 0.006 to 0.6 cm/min improved the stress transmission for powder stored at the highest humidity, but only in the intermediate range of pressures. Radial stress at the highest pressures (>10⁷ Pa) was essentially independent of the properties of the binder phase and the radial/axial stress ratio was ∼0.4. At high pressures, the product of (die wall friction) (radial/axial stress ratio) decreased with lubrication of the die and storage of the granulated powder at a higher percent relative humidity (softer granules).     

Numerical Model to Characterize the Size Increase of Combination Drug and Hygroscopic Excipient Nanoparticle Aerosols

Enhanced excipient growth (EEG) is a newly proposed respiratory delivery strategy in which submicrometer or nanometer particles composed of a drug and hygroscopic excipient are delivered to the airways in order to minimize extrathoracic depositional losses and maximize lung retention. The objective of this study was to develop a validated mathematical model of aerosol size increase for hygroscopic excipients and combination excipient–drug particles and to apply this model to characterize growth under typical respiratory conditions. Compared with in vitro experiments, the droplet growth model accurately predicted the size increase of single component and combination drug and excipient particles. For typical respiratory drug delivery conditions, the model showed that the droplet size increase could be effectively correlated with the product of a newly defined hygroscopic parameter and initial volume fractions of the drug and excipient in the particle. A series of growth correlations was then developed that successively included the effects of initial drug and excipient mass loadings, initial aerosol size, and aerosol number concentrations. Considering EEG delivery, large diameter growth ratios (2.1–4.6) were observed for a range of hygroscopic excipients combined with both hygroscopic and nonhygroscopic drugs. These diameter growth ratios were achieved at excipient mass loadings of 50% and below and at realistic aerosol number concentrations. The developed correlations were then used for specifying the appropriate initial mass loadings of engineered insulin nanoparticles in order to achieve a predetermined size increase while maximizing drug payload and minimizing the amount of hygroscopic excipient.     

Effect of Relative Humidity on the Antioxidant Activity of Spray-Dried Banana Passion Fruit (Passiflora Mollisima Baley)-Coated Pulp: Measurement of the Thermodynamic Properties of Sorption

The antioxidant activity of the spray-dried banana passion fruit-coated pulp with maltodextrin10 DE was evaluated throughout 30 days of storage at a temperature of 25°C for different relative humidity values It was influenced by the relative humidity throughout the 30 days of storage. In addition, the sorption equilibria of water for spray-dried banana passion fruit-coated pulp with maltodextrin 10 DE at 25, 35, 45, and 55°C, over a range of relative humidity levels from 0.113 to 0.843, was determined using a gravimetric static method. The isosteric heat and Gibbs free energy were calculated from the sorption equilibrium. The Guggenheim-Anderson-Boer (GAB) and Brunauer-Emmett-Teller (BET) models were tested to fit the experimental data. The GAB model was found to be the most suitable for describing the sorption curves, exhibiting an error smaller than 10% and an r greater than 0.99. The monolayer moisture content values for the sorption at different temperatures that were calculated using the GAB model ranged between 0.05315 to 0.05716 g water/g dry matter. The sorption curves exhibited a Type III behavior. The isosteric heat decreased with increasing moisture content while the Gibbs free energy increased.     

Development of a Phytopharmaceutical Intermediate Product via Spray Drying

The influence of concentration and incorporation time of different drying excipients on the processing yields and physical properties of Eugenia dysenterica DC spray-dried extracts were investigated following a factorial design. Under the established conditions, the process yield ranged from 57.55 to 89.14%, and in most experiments, the recovered products presented suitable flowability and compressibility, as demonstrated by the Hausner factor, Carr index, and angle of repose. Additionally, in a general way, the parameters related to the dried products' flowability varied over a range acceptable for pharmaceutical purposes. An analysis of variance (ANOVA) proved that both factors and some of their interactions significantly affected most of the investigated responses at different levels. Mannitol proved to be an interesting alternative as an excipient for the drying of herbal extracts, even at low concentrations such as 12.5%. Furthermore, these results imply that the best condition to obtain dry extracts of E. dysenterica with high performance and adequate pharmacotechnical properties involves the lowest concentration and the highest incorporation time of mannitol.