维吾尔药玫瑰花口服液的薄层色谱指纹图谱研究

采用硅胶GF254预制板,以氯仿-甲醇-甲酸(18∶6∶1)为展开剂,以槲皮素为参照物,对12批玫瑰花口服液进行展开,运用薄层扫描仪对样品进行单波长254 nm扫描.结果表明,薄层色谱分离较好,经薄层扫描后发现12批样品有4个共有峰,并对他们进行了相似度评价.TLC显示,不同批次的玫瑰花口服液成分数目和含量上基本一致,可通过薄层色谱指纹图谱初步进行该制剂质量评价.     

回归生活需观照生活的多面性

德育回归完整的生活,需要从整体上观照生活本身的多面性,尤其要能够在生活的物质与精神、当下与未来、成人与青少年、精英与大众、善与恶等层面之间寻求适恰的平衡,简单肯定一方而否定另一方的做法既不现实也不科学。     

财务与税法对职工薪酬处理的差异分析

由于财务与税法对于收入、支出、资产、负债等确认不同而产生了不同的处理方法,对两者在职工薪酬处理上的差异做了细致的分析,提出了在税法允许的范围内合理避税。     

“五育融合”的基本前提及其实践逻辑

“五育融合”的目的指向的是人的全面发展,但这并不是说“五育融合”就是将“五育”简单相加。实际上,“五育融合”是以“五育独立”为基本前提的;没有“五育独立”,也就无所谓“五育融合”。现有的德智体美劳各育在很大程度上偏离了其育人本性,因而“五育融合”必须以各育育人本性的恢复为基本条件。因此,学校教育的学科边界必须以人的完整性和生活的完整性来实现新的边界跨越,学校需要在生活化的教育逻辑下重构育人生态,从而真正实现“五育融合”。     

HVM-TSR高黏改性剂的制备及应用性能

为制备出性能优良且价格低廉的高黏改性剂,以降低高黏沥青使用成本,运用熔融共混工艺,将苯乙烯-丁二烯-苯乙烯嵌段共聚物(styrene-butadiene-styrene block copolymer, SBS)、萜烯-苯乙烯树脂(terpene-styrene resin, TSR)及少量增塑剂混炼制备出HVM-TSR高黏改性剂,研究其对基质沥青的改性效果,并选用传统高黏改性剂(TPS)作为对照组。通过常规物理性能试验确定HVM-TSR、TPS高黏改性剂各自的最佳掺量,结合离析试验、荧光显微镜、傅里叶变换红外光谱、动态剪切流变试验和弯曲梁流变试验,对HVM-TSR、TPS高黏沥青的热储存稳定性、微观结构、改性机理、高低温流变性能进行对比研究。结果表明：HVM-TSR、TPS高黏改性剂最佳掺量分别为14.5%～18.2%、15.2%～17.5%,最佳掺量范围内的HVM-TSR高黏改性剂颗粒均匀分散于沥青中形成致密连续的网状结构。HVM-TSR、TPS高黏沥青制备过程中均无新的官能团生成,高黏改性剂与沥青仅为物理共混。0～48 h热储存过程中,2种高黏沥青的软化点差均小于2.5℃,满足热...     

Increased mtDNA mutation frequency in oocytes causes epigenetic alterations and embryonic defectsOA

Mitochondria are essential for female reproductive processes,yet the function of mitochondrial D NA(mtDNA) mutation in oocytes remains elusive.By employing an mtDNA mutator(Polg^m) mouse model,we found the fetal growth retardation and placental dysfunction in post-implantation embryos derived from Polgm oocytes.Remarkably,Polgm oocytes displayed the global loss of DNA methylation;following fertilization,zygotic genome experienced insufficient demethylation,along with dysregulation of g...     

Current rice production is highly vulnerable to insect-borne viral diseasesOA

<正>Rice is one of the most important food crops and feeds more than half of the world’s population [1]. Arthropod-borne rice viruses have caused devastating epidemics in Asian countries and are a major threat to food security [2]. However,lile is known about the vulnerability of rice crops to viral pathogens [3,4], especially southern rice black-streaked dwarf virus (SRBSDV), rice black-streaked dwarf virus (RBSDV) and rice gall dwarf virus (RGDV), known to induce annual outbreaks by insec...     

社会保险体制改革下的个人缴费承受能力分析

社会保险的目的是保障人们的基本生活,既不能老无所养,也不能因为未来的养老支付而使人们现在的生活陷入困境。因此,社会保险的缴费,不仅要考虑到未来的养老需求,还要考虑当前的个人支付与承受能力。通过建立时间趋势模型,根据相关数据,通过分析与预测,考察中国现阶段及未来人们的社会保险个人缴费承受能力的合理性。     

Chinese Traditional Opera Revives Among College Students

They are college students but have different hobbies from their peers. “Peking Opera Journal” and “Theatric Monthly” are their favorite magazines and they surf on websites of traditional Chinese operas in their leisure time. They enjoy singing Chinese opera arias and talking about past anecdotes of the operatic circle. The ever-growing group of young college student fans for Peking opera and other local theatric genres indicate traditional Chinese operas are gaining revival on campus.