环境相对湿度对加热卷烟芯材及烟支物理特性的研究

本研究以喷涂法和稠浆法烟草薄片以及2种烟草薄片芯材制备的烟支为研究对象,围绕烟草薄片抗张强度及耐破度、烟支吸阻及烟气温度开展研究。结果表明,随着环境相对湿度从40%增加至80%,烟草薄片的含水率呈上升趋势,抗张强度和耐破度呈下降趋势。受烟草薄片中纤维和烟粉分布状况的影响,环境相对湿度对2种烟草薄片在抗张强度及耐破度方面的影响存在显著差异。烟支吸阻及烟气温度和环境相对湿度存在正相关性,其中稠浆法烟支的吸阻最高达1766 Pa,烟支的抽吸温度最高达72.3 ℃。当环境相对湿度从40%增加到50%时,烟草薄片含水率及烟支的吸阻变化幅度较小。为了保证芯材质量稳定性及烟支抽吸体验,2种烟草薄片及相应烟支的生产、储存温度为（23±1） ℃时,环境相对湿度应低于50%。     

关于《财务会计》中资产减值准备的教法分析

本文针对财务会计学中资产减值准备这一重要内容,从其基本理论、主要内容、会计处理等四个方面进行全面分析,弥补了教材中对此内容缺乏总体说明,没有分析对比的不足,帮助初学者更准确、更快捷地掌握这一知识点。     

安全系统的安全完整性水平及其选择

讨论安全完整性水平的概念、安全生命周期、安全完整性水平选择的定性、定量方法,介绍如何遵照功能安全的国际标准进行安全完整性水平选择.并结合一个具体实例,介绍了如何实现安全完整性水平选择的过程.     

UPLC法同时测定阿托伐他汀钙中15个杂质含量

目的 建立超高效液相色谱法(UPLC)同时测定阿托伐他汀钙原料药中15个杂质含量的方法.方法 采用岛津Shim-pack Velox PFPP(2.1 mm×100 mm,1.8μm)色谱柱,以3.9 g/L醋酸铵缓冲液(pH 5.0):乙腈:甲醇:四氢呋喃(无稳定剂)=67:21:6:6为流动相A,3.9 g/L醋酸...     

Where Are We with RPE Replacement Therapy? A Translational Review from the Ophthalmologist Perspective

The retinal pigmented epithelium (RPE) plays a pivotal role in retinal homeostasis. It is therefore an interesting target to fill the unmet medical need of different retinal diseases, including age-related macular degeneration and Stargardt disease. RPE replacement therapy may use different cellular sources: induced pluripotent stem cells or embryonic stem cells. Cells can be transferred as suspension on a patch with different surgical approaches. Results are promising although based on very limited samples. In this review, we summarize the current progress of RPE replacement and provide a comparative assessment of different published approaches which may become standard of care in the future.     

MTBE装置甲醇回收系统腐蚀原因分析及对策

分析了甲醇回收系统的腐蚀原因,分析结果表明,甲醇回收系统的腐蚀是电化学腐蚀,既存在析氢腐蚀也存在吸氧腐蚀,同时还存在机械磨损,分析结果有助于在工艺上采取减轻设备腐蚀方法的选择。     

Enhancing Post-Stroke Rehabilitation and Preventing Exo-Focal Dopaminergic Degeneration in Rats—A Role for Substance P

Dopaminergic signaling is a prerequisite for motor learning. Delayed degeneration of dopaminergic neurons after stroke is linked to motor learning deficits impairing motor rehabilitation. This study investigates safety and efficacy of substance P (SP) treatment on post-stroke rehabilitation, as this neuropeptide combines neuroprotective and plasticity-promoting properties. Male Sprague Dawley rats received a photothrombotic stroke within the primary motor cortex (M1) after which a previously acquired skilled reaching task was rehabilitated. Rats were treated with intraperitoneal saline (control group, n = 7) or SP-injections (250 µg/kg) 30 min before (SP-pre; n = 7) or 16 h (SP-post; n = 6) after rehabilitation training. Dopaminergic neurodegeneration, microglial activation and substance P-immunoreactivity (IR) were analyzed immunohistochemically. Systemic SP significantly facilitated motor rehabilitation. This effect was more pronounced in SP-pre compared to SP-post animals. SP prevented dopaminergic cell loss after stroke, particularly in the SP-pre condition. Despite its proinflammatory propensity, SP administration did not increase stroke volumes, post-stroke deficits or activation of microglia in the midbrain. Finally, SP administration prevented ipsilesional hypertrophy of striatal SPergic innervation, particularly in the SP-post condition. Mechanistically, SP-pre likely involved plasticity-promoting effects in the early phase of rehabilitation, whereas preservation of dopaminergic signaling may have ameliorated rehabilitative success in both SP groups during later stages of training. Our results demonstrate the facilitating effect of SP treatment on motor rehabilitation after stroke, especially if administered prior to training. SP furthermore prevented delayed dopaminergic degeneration and preserved physiological endogenous SPergic innervation.     

基于工业电力数据的区域制造业空间集聚模型

电力数据具有实时性和准确性的优点,越来越多的电网企业开展电力消费数据的应用服务,助力区域产业发展。基于此,提出将工业电力数据应用于区域产业空间集聚研究,综合采用区位商、空间基尼系数,分析单一产业的集聚程度;进一步,采用投入产出模型确定区域产业链的关联关系,再利用共同集聚指数计算产业链的集聚效应。最后采用福建省制造业电力消费数据,对福建省产业空间集聚开展实证分析,并以经济数据对结果进行校验,结果表明：电力数据具有动态监测产业集群空间集聚活动的能力,可为区域产业布局提供数据支撑。     

浙江红花山茶油的原料性状及品质分析

红花山茶油是具有高单不饱和脂肪酸含量和丰富活性物质的特有茶油品种。采集浙江代表性红花山茶籽11种,分析出仁率和籽仁常规营养指标等原料性状,并通过超临界CO_2法萃取山茶油进行脂肪酸组成以及活性物质含量测定。结果表明,干基籽仁粗脂肪为57.31%～68.78%,粗蛋白6.92%～10.64%,总糖质量分数20.41%～28.90%;超临界萃取红花山茶油的油酸质量分数为81.93%～84.42%,不饱和脂肪酸质量分数为87.81%～89.88%,α-维生素E为36.23～58.46 mg/100 g、角鲨烯为16.80～53.56 mg/100 g、茶多酚为43.44～76.76μg/g、茶皂素为2.36～4.86 mg/g。浙江红花山茶籽仁粗脂肪均值,油中油酸质量分数和茶多酚含量均高于普通山茶油,其中油酸质量分数优于其他品种红花山茶油;通过灰色关联度法分析浙江红花山茶籽性状、油品质指标得到最优的采样地均为常山县芳村镇。     

美拉德反应热加工牛肉香精的研究

利用美拉德反应,研制一种热加工牛肉香精,设计了10组牛肉香精前体物质配方。根据牛肉香精的评价标准,请10人对所制备的牛肉香精进行感官评定。对所得数据进行统计学处理,得到两种优质牛肉香精前体物质配方。配方Ⅰ:核糖0.5g,葡萄糖0.6g,β-丙氨酸0.233g,半胱氨酸盐酸盐0.5g,谷氨酸0.5g,甘氨酸0.16g,水12g。配方Ⅱ:核糖0.6g,葡萄糖0.5g,β-丙氨酸0.5g,半胱氨酸盐酸盐0.233g,谷氨酸0.16g,甘氨酸0.5g,水12g。最适合美拉德反应条件:121℃加热30min,最后用NaOH调节香精pH值到6.6～6.8。