摘要：The growth plate(GP)is a crucial tissue involved in skeleton development via endochondral ossification(EO).The bone organoid is a potential research model capable of simulating the physiological function,spatial structure,and intercellular communication of native ***,mimicking the EO process remains a key challenge for bone organoid *** simulate this orderly mineralization process,we designed an in vitro sh Ca_(v)3.3 ATDC5-loaded gelatin methacryloyl(Gel MA)hydrogel model and evaluated its bioprintability for future organoid *** this paper,we report the first demonstration that the T-type voltage-dependent calcium channel(T-VDCC)subtype Ca_(v)3.3 is dominantly expressed in chondrocytes and is negatively correlated with the hypertrophic differentiation of chondrocytes during the EO ***,Ca_(v)3.3 knockdown chondrocytes loaded with the Gel MA hydrogel successfully captured the EO process and provide a bioink capable of constructing layered and orderly mineralized GP organoids in the *** results of this study could therefore provide a potential target for regulating the EO process and a novel strategy for simulating it in bone organoids.

摘要：制药厂高浓度有机废水采用自主设计的膜-厌氧反应器进行厌氧消化和膜过滤实验,观察制药废水COD去除效果和COD容积负荷,实验结果表明,膜-厌氧反应运行稳定,产气量高,出水水质较好,COD去除率最高达99.4%,COD容积负荷最高达到25kg/m3·d,底部污泥浓度达到30.1g/L,采用此工艺可以取消添加絮凝剂预处理工序,降低了运行成本。

摘要：采用液相还原法制备活性炭负载纳米铁(nZVI/AC),利用X射线衍射仪(XRD)对其进行表征,设计单因素试验与正交试验探究nZVI/AC降解2,4-二硝基苯酚(2,4-DNP)效果和最佳条件。XRD表征结果显示成功制备出nZVI/AC。单因素试验结果表明,弱酸性有利于nZVI/AC对2,4-DNP的降解,在2,4-DNP质量浓度为2~20 mg/L的条件下,随着2,4-DNP初始浓度的升高,其降解率先提升后下降,nZVI/AC投加量的增加与振荡时间的延长均能提升2,4-DNP的降解效果。正交试验得出的影响因素排序为:2,4-DNP初始浓度>振荡时间> nZVI/AC投加量>初始pH值;在废水体积为50 mL, 2,4-DNP的初始质量浓度为16 mg/L,初始pH值为6, nZVI/AC的投加量为5 g/L,振荡反应时间为120 min的最佳条件下,2,4-DNP的最高去除率达到89%。