Category: Scientific papers

Effects of cryogenic freezing by liquid nitrogen on the quality and microstructure of silver pomfret (pampus argenteus)

Effects of cryogenic freezing by liquid nitrogen on the quality and microstructure of silver pomfret (pampus argenteus) Lu, J., Yu, H.-X., Yang, S.-B., Jiang, Q.-Q., Liu, W.-J., Dong, K.-C., Hu, Y.-Q. 中文摘要:       银鲳鱼经液氮喷淋方法（中心温度达-40 ℃，需20 min）冻结后于-18 ℃进行冻结贮藏试验。作为对照，对大小相近的同批原料进行平板冻结（中心温度达-20 ℃，需6 h）及冰柜冻结(中心温度达-18 ℃，需20 h)处理，冻藏条件与液氮速冻样品相同。结果表明，液氮速冻、平板速冻、冰柜冻结的样品的pH值在第105天降至最低（6.42、6.35、6.11），冻藏150天后盐溶蛋白质浓度分别为6.71、3.24、1.38 mg/g，Ca2+-ATPase活性分别为1.73×10-3、0.76×10-3、0.56×10-3 μmol/(min?mg)。冻结温度愈低，K值、TVBN值增加愈小。TPA图谱分析显示，硬度、弹性和回复性均随着冻藏时间的延长呈显著降低趋势(P＜0.05)；较低的冻结温度可使各指标数值变化趋缓。微观结构观察发现，贮藏150天的液氮组样品肌纤维间隙最小、细胞完整致密，与新鲜样品最为接近；液氮深冷速冻对银鲳冻藏品质维持效果最佳。 英文摘要: Abstract:       Silver pomfret (Pampus argenteus) was pretreated with liquid nitrogen (LN2) by… Continue reading Effects of cryogenic freezing by liquid nitrogen on the quality and microstructure of silver pomfret (pampus argenteus)

Pharmaceutical spray freeze drying

Pharmaceutical spray freeze drying Stefan Wanning, Richard Süverkrüp, Alf Lamprecht Abstract Pharmaceutical spray-freeze drying (SFD) includes a heterogeneous set of technologies with primary applications in apparent solubility enhancement, pulmonary drug delivery, intradermal ballistic administration and delivery of vaccines to the nasal mucosa. The methods comprise of three steps: droplet generation, freezing and sublimation drying, which… Continue reading Pharmaceutical spray freeze drying

Preparation of transparent neodymium-doped yttrium aluminate garnet (Nd:YAG) ceramics with the use of freeze granulation

Preparation of transparent neodymium-doped yttrium aluminate garnet (Nd:YAG) ceramics with the use of freeze granulation Anna Wajler, Helena Węglarz, Agata Sidorowicz, Łukasz Zych, Magdalena Nakielska, Katarzyna Jach, Henryk Tomaszewski Abstract This paper presents the results of the application of freeze granulation to the production of transparent neodymium-doped yttrium–aluminum garnet ceramics. Aqueous suspensions of aluminium oxide, yttrium oxide and neodymium oxide powders… Continue reading Preparation of transparent neodymium-doped yttrium aluminate garnet (Nd:YAG) ceramics with the use of freeze granulation

Granulation techniques and technologies: recent progresses

Granulation techniques and technologies: recent progresses Srinivasan Shanmugam Pharm. R&D Institute, Hanmi Pharm. Co., Ltd., Hwasung, Gyeonggi, Korea Abstract Granulation, the process of particle enlargement by agglomeration technique, is one of the most significant unit operations in the production of pharmaceutical dosage forms, mostly tablets and capsules. Granulation process transforms fine powders into free-flowing, dustfree… Continue reading Granulation techniques and technologies: recent progresses

Thermal properties of alumina–MWCNTs composites

Thermal properties of alumina–MWCNTs composites Ondrej Hanzel Jaroslav Sedláček Eva Hadzimová Pavol Šajgalík Alumina–multi-wall carbon nanotubes composites were prepared using a new approach. This process comprises functionalization MWCNTs by acid treatment, stabilization of alumina–MWCNT dispersion with subsequent freezing was used, which resulted in formation of granulated powder with homogeneous distribution of MWCNTs. The ceramic composites… Continue reading Thermal properties of alumina–MWCNTs composites

Freeze Granulation of vanillin flavour

Effect of whey protein isolate and β-cyclodextrin wall systems on stability of microencapsulated vanillin by spray–freeze drying method Swetank Y. Hundre, P. Karthik, C. Anandharamakrishnan Vanillin flavour is highly volatile in nature and due to that application in food incorporation is limited; hence microencapsulation of vanillin is an ideal technique to increase its stability and… Continue reading Freeze Granulation of vanillin flavour

Spray freeze drying for dry powder inhalation of nanoparticles

Spray freeze drying for dry powder inhalation of nanoparticles Mohamed Ehab Ali Alf Lamprecht Formulating nanoparticles for delivery to the deep lung is complex and many techniques fail in terms of nanoparticle stability. Spray freeze drying (SFD) is suggested here for the production of inhalable nanocomposite microcarriers (NCM). Different nanostructures were prepared and characterized including… Continue reading Spray freeze drying for dry powder inhalation of nanoparticles

Spray Freeze Granulation of Nano Powders for Die Pressing

Spray Freeze Granulation of Nano Powders for Die Pressing Jon Binner, Ketharam Annapoorani, Bala Vaidhyanathan The processing of nanocrystalline yttria doped zirconia powder via dry forming routes has been investigated via the granulation of the powder using spray freeze drying (SFD). Free-flowing and crushable powders suitable for either die or isosatic pressing have been achieved… Continue reading Spray Freeze Granulation of Nano Powders for Die Pressing