Applications of scaffolds: Tools for enhancing the immunomodulation of mesenchymal stromal cells

Exogenously delivered mesenchymal stromal cells (MSCs) are therapeutically beneficial owing to their paracrine effect; they secrete various cytokines, nucleic acids, and proteins. Multiple bioengineering techniques can help MSC cultures to release secretomes by providing stem cell niche-like conditions (both structurally and functionally). Various scaffolds mimic the natural extracellular matrix (ECM) using both natural and synthetic polymers, providing favorable environments for MSC proliferation and differentiation. Depending on material properties, either topographically or elastically structured scaffolds can be fabricated. Three-dimensional scaffolds have tunable substrate rigidities and structures, aiding MSC cultivation. Decellularized ECM-derived hydrogels are similar to the natural ECM, thus improving the paracrine effects of MSCs. Here, we discuss recent research on the application of scaffolds to maximize the immunomodulatory function of MSCs.     

玻璃制作工具用5%ZrO2纳米铂材的机械合金化制备（英文）

对机械合金化制备的玻璃工业中用作结构零件的Pt-5%ZrO2(体积分数)的进行表征。通过锆丝电爆炸法制备氧化锆(ZrO2)纳米颗粒(粒径<100 nm),并在室温下与铂粉(粒径<44?m)球磨2~72 h。普通球磨至48 h时,铂粒径遵循经典的递减趋势,至72 h时观测到颗粒团聚现象。晶粒尺寸演变规律与颗粒尺寸规律相似,48 h后减至50 nm左右。但是,铂晶粒的均方根应变规律相反,一直在增长,直至48 h时得到最大值,然后出现弛豫。粉末球磨48 h后,采用放电等离子体烧结制成块体。根据测量得到烧结体的质量损失表明:合金虽然相对密度较低,但有较好的热稳定性。     

从铜合金渣中选择性回收锡及其热处理合成SnO2（英文）

采用选择性溶解方法对铜合金废渣中的锡进行富集和分离。使用HNO3溶液溶解铜合金废渣,渣中的锡不会溶解从而使其从中得到分离。通过离心分离生成的H2SnO3沉淀相,然后经过干燥加热生成SnO2粉末。对SnO2粉末的相组成、表面形貌和化学成分进行分析。     

玻璃制作工具用5%ZrO_2纳米铂材的机械合金化制备(英文)

对机械合金化制备的玻璃工业中用作结构零件的Pt-5%ZrO2(体积分数)的进行表征。通过锆丝电爆炸法制备氧化锆(ZrO2)纳米颗粒(粒径100 nm),并在室温下与铂粉(粒径44?m)球磨2~72 h。普通球磨至48 h时,铂粒径遵循经典的递减趋势,至72 h时观测到颗粒团聚现象。晶粒尺寸演变规律与颗粒尺寸规律相似,48 h后减至50 nm左右。但是,铂晶粒的均方根应变规律相反,一直在增长,直至48 h时得到最大值,然后出现弛豫。粉末球磨48 h后,采用放电等离子体烧结制成块体。根据测量得到烧结体的质量损失表明:合金虽然相对密度较低,但有较好的热稳定性。     

从铜合金渣中选择性回收锡及其热处理合成SnO_2(英文)

采用选择性溶解方法对铜合金废渣中的锡进行富集和分离。使用HNO3溶液溶解铜合金废渣,渣中的锡不会溶解从而使其从中得到分离。通过离心分离生成的H2SnO3沉淀相,然后经过干燥加热生成SnO2粉末。对SnO2粉末的相组成、表面形貌和化学成分进行分析。     

Water sorption characteristics of dried red peppers (Capsicum annum L.)

The water sorption isotherms of whole dried red pepper pods at 15, 25, 40°C were measured, and the results were used to test the applicability of the GAB equation, BET equation, and modified BET equation. the GAB, BET, and modified BET equations fitted the data well for water activities up to 0.93, 0.43, and 0.75, respectively. the monolayer values were found to range between 6 and 10 g H₂O per 100g solid, depending on temperature and the equation used for estimation. the excess heat of sorption as a function of moisture content was also determined.