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- 保修期:
12个月
- 现货状态:
现货
该款设备主要用于输出均匀稳定且可以定量的固态粉尘气溶胶。粉尘气溶胶发生浓度可自动计算,在软件界面上实时显示。
性能特点:
程序控制,参数均可在触控屏上操作,操作简单
粉尘进给速度可调且精密控制,
样品量不受限制,可微量发生,样品可实时添加
气体流量可调节
高低浓度可实时调节
输出稳定,速度均一,粒径均匀
发生浓度可自动计算,在软件界面上实时显示
应用范围:
基础气溶胶研究
过滤器的效率研究
吸入和毒理学实验
药学气溶胶
大气污染-研究PM2.5颗粒物环境污染和健康效应关系
燃烧过程的优化
评价和校准粉尘采样器和监视器
公司简介:
北京元森凯德生物技术有限公司2013年成立于北京中关村科技园,是一家专业从事生命科学类实验仪器研制、生产与销售的科技创新型企业。服务毒理学、药理学、免疫学、生物安全、大气污染物、化学物质毒性鉴定、临床前药物开发与安全性评价、呼吸系统、环境与健康等领域。
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文献和实验a single component often cannot accurately represent the deposition
behavior across the entire system.
Local structural features (such as protrusions, recessed ribs, and
surface roughness) [8,20,24,25] and air conditions (temperature and
humidity) [26,27] are also critical factors influencing particle deposi-
tion within ducts. Surface roughness, small protrusions, or ribs enhance
velocity fluctuations in the near-wall region, accelerating particle
deposition in these areas [28,29]. When local structures cause signifi-
cant flow blockage, they alter the core region’s flow conditions, further
intensifying deposition [12]. Air temperature affects particle deposition
by modifying the temperature gradient near the duct wall and, under
extreme conditions, can even alter the yield limit of duct and particle
materials [30]. Similarly, changes in relative humidity influence air
viscosity, which promotes the agglomeration of smaller particles into
larger ones. This increased inertia enhances particle settling on duct
walls, while higher humidity strengthens adhesion forces during
particle-wall collisions, making particles more likely to be captured
[31]. Given the complexity of these mechanisms, experimental studies
remain the most direct and reliable method for understanding particle
deposition dynamics, particularly in critical engineering applications.
A review of the existing literature indicates that particle deposition
in ducts is a complex interdisciplinary issue involving physical and non-
physical interactions. Although previous experimental studies [13,
16–18] have provided valuable insights, most of these studies rely on
simplified duct designs and idealized flow conditions. In contrast, the
ASDs of sizeable public transportation systems, such as high-speed
trains, typically have narrow, complex structures with multiple outlets
[32,33]. The airflow in these systems is usually in a developing turbulent
state with complex flow features such as vortices, secondary flows, and
flow separations, unlike the fully developed turbulence typically
assumed in simplified duct systems. As a result, existing research may
.结构 如图7-4所示,ICP由三部分组成:a.高频发生器和高频感应线圈;b.炬管和供气系统;c.雾化器及试样引入系统。 炬管由三层同轴石英管组成,最外层石英管通冷却气(Ar气),沿切线方向引入,并螺旋上升,其作用:将等离子体吹离外层石英管的内壁,可保护石英管不被烧毁;同时,这部分Ar气同时也参与放电过程。中层石英管通入Ar气(工作气体),起维持等离子体的作用。内层石英管内径为1~2mm左右,以Ar为载气,把经过雾化器的试样溶液以气溶胶形式引入等离子体中。 三层同轴石英炬管放在高频感应
相关专题 细胞培养相关用品 细胞培养专题 需要明确了解生物安全柜与通风柜/超净工作台的区分。通风柜和超净工作台不属于生物安全柜,不可使用在涉及微生物 材料的实验或生产过程中。 生物安全柜(Biological safety cabinets,BSCs)是为操作原代培养 物、菌毒株以及诊断性标本等具有感染性的实验材料时,用来保护工作人员、实验室环境以及实验品,使其避免暴露于上述操作过程中可能产生的感染性气溶胶和溅出物而设计
实验室的许多操作可以产生微生物 气溶胶,并随空气扩散而污染实验室的空气,当工作人员吸人了污染的空气,便可以引起实验室相关感染。在病原微生物实验室中,产生的微生物气溶胶可分为两大类:一类是飞沫核气溶胶,另一类是粉尘气溶胶。 这两类微生物气溶胶对实验室工作人员都具有严重的危害性,其程度取决于微生物本身的毒力、气溶胶的浓度、气溶胶粒子大小以及当时实验室内的微小气候条件。研究发现,粒径~100/xm的飞沫沉降很快,而粒径5/lm的飞沫核能够被呼吸道的粘膜捕获。 Kenny
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