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为研究辛夷再造烟叶对卷烟烟气成分的影响,采用对比分析方法,先用吸烟机捕集卷烟烟气,收集主流烟气的总粒相物,再用超声波萃取方法对收集烟气粒相物的剑桥滤片进行萃取,分析烟气中的常规成分(烟碱、焦油、水分),最后用气相色谱-质谱法(GC-MS)定性、定量分析烟气化学成分.结果表明,与空白样对比,辛夷再造烟叶卷烟对总粒相物、烟碱、焦油量影响不明显;对卷烟致香成分的增加起到有利作用,其中增加的主要致香成分中糠醛在各添加比例中的增加量达到40%左右、柠檬烯在各添加比例中的增加量达到50%左右、丁香酚在4‰辛夷再造烟叶卷烟中的增加量达到66.30%,巨豆三烯酮在2‰辛夷再造烟叶卷烟中的增加量达到93.30%,肉豆蔻酸在4‰辛夷再造烟叶卷烟中的增加量达到186.67%,金合欢醇在4‰辛夷再造烟叶卷烟中的增加量甚至达到241.81%. 相似文献
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硅胶表面修饰添加剂选择性降低卷烟烟气中的苯酚 总被引:1,自引:0,他引:1
分别以聚乙烯亚胺(PEI)、十六烷基三甲基溴化铵(CTMAB)对硅胶(SiO2)表面进行修饰,并以苯酚为模板,合成硅胶表面修饰分子印迹聚合物(MIP-SiO2),制备获得功能添加剂PEI-SiO2、CTMAB-SiO2、MIP-SiO2。按不同剂量分别将功能添加剂加入到卷烟滤嘴中,考察对卷烟主流烟气中苯酚的截留效率。结果表明,各添加剂均可有效降低卷烟烟气中的苯酚释放量。当添加量达到20mg/支时,各功能材料对苯酚的截留效率均超过39%。且添加剂对烟气中苯酚的截留能力大于对烟气中焦油的吸附能力,表明功能添加剂具有选择性降低卷烟烟气中苯酚的作用。 相似文献
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全梗全叶再造烟叶热裂解产物与感官质量关系研究 总被引:1,自引:0,他引:1
通过对全梗、全叶单体原料制备的再造烟叶热裂解产物GC-MS鉴定分析,探讨热解产物的差异性对感官质量的影响。结果表明,梗、叶单体原料制备的再造烟叶热裂解产物主要包括醛、酮、酚、芳烃、杂环类物质,其中全梗再造烟叶检出49种物质,全叶再造烟叶检出60种物质。全叶再造烟叶热裂解产物中的主要烟草中重要的致香物质醛、酮、酚类物质的数量和所占比例明显高于梗再造烟叶;芳烃和杂环类物质的数量和所占比例较接近;全叶再造烟叶在香气质、杂气、刺激性方面明显优于全梗再造烟叶,这与全叶再造烟叶热裂解产物中的烟草主要致香成分释放量明显高于全梗再造烟叶有直接关系。 相似文献
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采用污染物在线分析仪、气相便携红外分析仪研究了程序升温条件下改变氧化介质时煤中氮,硫的释放特性以及含硫物相的浓度变化规律,探讨了不同气氛,CO2浓度与O2浓度单独变化时对NO、SO2析出特性的影响机理.结果表明:O2/CO2燃烧气氛下NO、SO2排放峰值及总量均低于O2/N2气氛.CO2气氛下烟气中存在大量的CO,有利于NO的降解,同时也促进了烟气中其他含硫物相的形成,随着CO2浓度的增加,特别是在燃烧后期,NO、SO2的排放显著降低.O2浓度改变对NO和SO2的释放影响不同:O2浓度升高促进了SO2的析出;但是O2浓度在一定范围内增加对NO的排放并无明显影响,随着O2浓度进一步增加,NO的释放峰向低温区迁移,同时排放量降低. 相似文献
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Results of radionuclide activity concentration measurements in deposition and ground-level air conducted at the station of
the Institute of Physics situated 3.5 km from the Ignalina Nuclear Power Plant (Ignalina NPP) in 2005 are analyzed. Atmospheric
depositional fluxes of 7Be, 60Co and 137Cs are estimated. Radionuclide particle deposition rates are calculated. The Hybrid Single-Particle Lagrangian Integrated
Trajectory (HYSPLIT) model of the global dispersion and deposition is used to explain variations in the 137Cs activity concentration in the ground-level air in the Ignalina NPP region in 2005. An increase in the 137Cs activity concentration of up to 17.4 μBq m−3 on 30 October-5 November is studied. Modelling results show that the Chernobyl NPP Unit 4 Sarcophagus and the radiocaesium
resuspension from the Chernobyl NPP accident polluted regions are sources of 137Cs to the environment of the Ignalina NPP. Results on solubility in water of aerosols — carriers of 137Cs — are discussed. 相似文献
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I. N. Wischnewski H. V. Klapdor H. Fromm P. Herges 《Zeitschrift für Physik A Hadrons and Nuclei》1981,301(1):29-34
High spin states have been investigated by the reaction90Zr(19F, 3nγ), using an Anticompton spectrometer device, for the nucleus106In, for which no in-beamγ-spectroscopic information was available up to now. A level scheme has been constructed up to anI =(13,14) state. 相似文献
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In this paper, we investigate the data of industries in China and find that the frequency distributions of fixed assets and fixed-assets’ investment of industries obey power laws. We show that these power-law modes can be explained by the rules of the Simon Model, rather than the existing investment theories such as the classical investment theory or acceleration principle. Moreover, the mechanism of the investment distribution may be similar to the forest-fire model of self-organizing criticality. By introducing the complex system methods, this research changes the traditional opinion of the investment and gains some meaningful understanding in the dynamics of industries and the economic cycle. 相似文献
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A. Ghosh S.K. Adhikari 《The European Physical Journal B - Condensed Matter and Complex Systems》1998,2(1):31-36
The solutions of a renormalized BCS equation are studied in three space dimensions in s, p and d waves for finite-range separable
potentials in the weak to medium coupling region. In the weak-coupling limit, the present BCS model yields a small coherence
length and a large critical temperature, , appropriate for some high- materials. The BCS gap, , and specific heat as a function of zero-temperature condensation energy are found to exhibit potential-independent universal scalings. The
entropy, specific heat, spin susceptibility and penetration depth as a function of temperature exhibit universal scaling below
in p and d waves.
Received: 18 July 1997 / Revised: 8 September 1997 / Accepted: 29 September 1997 相似文献
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The thermal instability of a layer of Rivlin-Ericksen elastico-viscous fluid in porous medium acted on by a uniform magnetic field is considered. For stationary convection, Rivlin-Ericksen elastico-viscous fluid behaves like a Newtonian fluid. The magnetic field is found to have stabilizing effect whereas medium permeability has destabilizing effect. The magnetic field introduces oscillatory modes in the system, A sufficient condition for the non-existence of overstability is also obtained. 相似文献
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It is shown that bulk semiconductors exhibit strongly asymmetric Fano-type resonance profiles in magnetoabsorption processes
involving the formation of hot electron-hole pairs (EHPs) and accompanied by the scattering of the EHPs by defects. This result
is valid for transitions to electronic states with large Landau quantum numbers, when the Coulomb interaction plays a small
role. The physical reason for such a sharp change in the magnetoabsorption coefficient as compared with the expected result
for the ordinary density of states in a quantizing magnetic field is that the electronic excitations are quasi-one-dimensional.
The form of the resonance absorption is in good qualitative agreement with the experimental data.
Pis’ma Zh. éksp. Teor. Fiz. 63, No. 8, 619–622 (25 April 1996) 相似文献
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We present the action and transformation laws of supergravity in 11 dimensions which is expected to be closely related to the O(8) theory in 4 dimensions after dimensional reduction. 相似文献
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