检索结果-南通市图书馆

国外内燃机车 2012年第6期 37-43页

作者： Dustin osborne 管明华

本文介绍了标定牵引功率为3280kW、符合Tier2标准的GE ES44DC干线机车的排放测试结果和使用生物柴油混合燃料对机车排放的影响。使用含硫约400ppm的试验燃料进行基准排放测试,然后分别使用掺混比为2%、10%、20%和100%的生物柴油(由大豆... 详细信息

本文介绍了标定牵引功率为3280kW、符合Tier2标准的GE ES44DC干线机车的排放测试结果和使用生物柴油混合燃料对机车排放的影响。使用含硫约400ppm的试验燃料进行基准排放测试,然后分别使用掺混比为2%、10%、20%和100%的生物柴油(由大豆提炼的)进行测试。气态和颗粒排放物按照美国联邦法规第40章92款进行采样。测试结果表明,与基础油相比,在美国环保局(EPA)干线机车牵引循环和调车循环时每种掺混油的颗粒物(PM)排放量均有所降低。混合10%生物柴油时,PM排放量降低最为显著。相比较而言,继续增加生物柴油比例对于进一步促进PM排放降低的效果有限。使用生物柴油时,就PM排放而言,调车循环比干线循环时降低更显著。使用B2、B10、B20混合燃料时循环加权氮氧化物(NOx)排放量的增加不明显,在试验误差范围内。然而,使用B100燃料干线机车牵引循环时NOx排放增加近15%。除使用纯生物柴油时碳氢化合物(HC)排放在干线和调车分别降低了21%和24%外,其他各工况碳氢化合物排放量在正常试验误差内。与使用基准油相比,测得干线牵引循环下使用B20和B100燃料一氧化碳排放量分别降低了17%和24%。使用B2和B10混合燃料时,体积燃油消耗增加了约1%。使用B20混合燃料时,体积燃油消耗略高于2%,使用B100燃料时增加了近7%。

关键词：生物柴油混合燃料内燃机车排放干线内燃机车牵引循环调车循环

维普期刊数据库

培养人眼视网膜色素上皮细胞β_2肾上腺能受体分析

在线全文

学校读者我要写书评

暂无评论

北京医科大学学报 1993年第6期25卷 427-429,T022页

作者：刘宁朴张惠蓉 N N osborne 北京医科大学第三医院眼科 Nuffield Lab of Ophthalmology Oxford UniversityU K.

研究证实培养人眼视网膜色素上皮(RPE)细胞具有β_2肾上腺能受体。异丙肾上腺素、Sa-lbutamol和多巴胺均通过激活β_2受体诱导细胞内cAMP合成,其效应可被β受体拮抗剂心得安和β_2受体拮抗剂ICI 118551所阻断,而β_1受体拮抗剂CGP20712 ... 详细信息

研究证实培养人眼视网膜色素上皮(RPE)细胞具有β_2肾上腺能受体。异丙肾上腺素、Sa-lbutamol和多巴胺均通过激活β_2受体诱导细胞内cAMP合成,其效应可被β受体拮抗剂心得安和β_2受体拮抗剂ICI 118551所阻断,而β_1受体拮抗剂CGP20712 A对之无影响;作为选择性β_2受体激动剂的Pi-ndolol和OXPrenolol也不影响cAMP的基础水平。结果提示:在人眼RPE细胞,其β肾上腺能受体以β_2受体亚型为主要存在形式;β_2受体对RPE细胞复杂的生理功能可能具有重要的调控作用。

关键词：视网膜色素上皮细胞培养 cAMP

维普期刊数据库

在线全文

学校读者我要写书评

暂无评论

固液分离(三)——第五章重力增稠

石油机械 1981年第4期 45-56页

作者： D.G. osborne

符号说明 a、A——沉淀截面积,米2; C——固体浓度,即单位重量液体中含有的固体重量; C均——固体在浓缩区内的平均浓度; d——圆形罐直径,米, h——从基底到界面的高度,米; QF——进料量,米3/秒; Q0——溢流量,米3/秒;

关键词：增稠器沉淀物浓密机絮凝剂固体浓度絮凝物悬浮液固体颗粒沉淀点絮凝处理化学处理固液分离

Bromolasalocid:一种具有抗高血压作用的离子透入剂

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

国外医学.药学分册 1983年第1期 15-17页

作者： osborne MW 芮耀诚

离子透入剂（Ionophores）是可以移动的阳离子载体,并具有结合和转运有机胺的能力。某些离子透入剂能浓集和转运Ca++,因而大量研究集中于其对哺乳动物心肌的作用。早期的研究主要针对钙离子透入剂Ro.2-2985（X5374）,它可引起总外周阻... 详细信息

离子透入剂（Ionophores）是可以移动的阳离子载体,并具有结合和转运有机胺的能力。某些离子透入剂能浓集和转运Ca++,因而大量研究集中于其对哺乳动物心肌的作用。早期的研究主要针对钙离子透入剂Ro.2-2985（X5374）,它可引起总外周阻力降低而血压却稍升高,说明它使主动脉腔径缩小而伴有扩张性增

关键词：抗高血压作用离子透入 Bromolasalocid 外周阻力高血压性搏动流动脉扩张性系数动脉顺应性动脉压力感受器降压作用

Characterization of a Liquid Crystal Stabilized Pharmaceutical Oil-in-Water Emulsion Optimized for Skin Delivery

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Cosmetics, Dermatological Sciences and Applications 2018年第4期8卷 207-217页

作者： Melinda J. Sutton David W. osborne Kevin Dahl Victoria Bax G. Alan Schick Department of Chemistry Missouri State University Springfield MO USA Dow Development Institute Petaluma CA USA KBI Biopharma Boulder CO USA

A moisturizing cream containing 25 wt% of an organic solvent, diethylene glycol monoethyl ether (DEGEE), is observed to be stabilized by an emulsifying wax blend of cetearyl alcohol, dicetyl phosphate, and ceteth-10 phosphate (tradename Crodafos CES). Polarized light microscopy indicates that the Crodafos CES helps to produce a liquid-crystal stabilized oil-in-water emulsion, which is physically stable for months under accelerated aging conditions and chemically stable over the full topical pH range of 3.5 to 9. Emulsion globule size in the cream is observed to be dependent on the degree of emulsifying wax neutralization, with the globule size decreasing with increasing cream pH. The superior solubilizing properties of DEGEE combined with the full pH range and liquid-crystal stabilizing properties of the Crodafos CES give this formulation the potential for a wide range of applications in the topical delivery of active pharmaceutical ingredients.

关键词： Pharmaceutical Emulsion Skin Delivery Liquid Crystal Stabilized Emulsion Polarized Light Microscopy Topical Formulation

Effect of Added Cu(OTf)2on the Cu(OTf)2(Py)4-Mediated Radiofluorination of Benzoyl and Phthaloylglycinates

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Natural Science 2018年第3期10卷 125-133页

作者： David W. Blevins George W. Kabalka Dustin R. osborne Murthy R. Akula Department of Radiology University of Tennessee Medical Center Knoxville Tennessee USA Department of Chemistry University of Tennessee Knoxville Tennessee USA

Cu(OTf)2(Py)4 mediated radiofluorination of the boronate esters of ethyl benzoyl and phthaloylglycinates (11 and 16) using 10 mol% of the copper complex following the literature procedure did not provide the fluorinated products. However, the addition of Cu(OTf)2resulted in the radio-fluorination of the boronate esters 11 and 16 to obtain ethyl 4-[18F]fluorobenzoyl glycinate, 17, (48%) and ethyl 3-[18F]phthaloylglycinate (41%) respectively.

关键词： Glycinates Boronate Esters Gorlos-Phos Radiofluorination Copper Triflate

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

校园生活：新西兰教育

初中全科导学 2011年第9期 38-39页

作者： Chole osborne Sunware（译）

本单元的主题是校园生活，同学们在课本中已经学会了英语在校园交往中的简单应用。今天，小编就带大家去了解在英语国家，同学们都是怎样度过校园一天的，在扩宽视野的同时也提高自己的阅读能力。

关键词：校园生活新西兰教育英语国家阅读能力同学课本

Sample preference for colorectal cancer screening tests: Blood or stool?

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Preventive Medicine 2012年第3期2卷 326-331页

作者： Joanne M. osborne Carlene Wilson Vivienne Moore Tess Gregory Ingrid Flight Graeme P. Young CSIRO Preventative Research Flagship Adelaide Australia Discipline of Public Health University of Adelaide Adelaide Australia Flinders Centre for Cancer Prevention and Control Flinders University of South Australia Adelaide Australia

Objective: Despite the high prevalence of CRC and the proven benefits of faecal sampling tests, participation rates in CRC screening are suboptimal. Literature has identified a number of barriers to participation, including faecal aversion. Emerging test technologies suggest blood-based molecular markers might provide an alternative, more acceptable option, for CRC screening tests. We aim to determine preference for blood compared to faeces as the sample for the screening test. Methods: A survey was mailed to 956 South Australians aged 50 to 74 years. Data were collected on sample preference, demographic variables, and ratings of screening test convenience and comfort. Results: The survey yielded a 43% response rate. The majority of participants preferred to provide a blood sample (78% v 22%, p < 0.001). Women were more likely to prefer blood than men (82% vs 74%, p = 0.05). Sample experience influenced preferences, with a significantly higher preference for faeces among participants with experience in faecal sampling (27% vs 17% with no experience, p < 0.05). Participants who preferred to provide a faecal sample rated it significantly more convenient (p < 0.001), more comfortable (p < 0.001), and more acceptable (p < 0.001) than those who preferred blood sampling. Conclusions: Survey participants overwhelmingly indicate a preference for the idea of a blood sample over a faecal sample for CRC screening. Preference was influenced by gender, experience with sampling method and the individual’s perception of sampling convenience, sampling comfort and sample acceptability. Our results suggest population participation rates are likely to improve with blood-based screening tests.

关键词： Colon Cancer Screening Faecal Occult Blood Test Sample Preference Stool Sampling Blood Sampling Participation

The Potential Relationship between the Incidence of Neurodegenerative Disease and Trace Mineral Composition in the Drinking Water of Rural Residents of Ontario

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Water Resource and Protection 2017年第8期9卷 881-889页

作者： Avery R. Richer Joanna N. Bil John P. Cant Vern R. osborne Department of Animal Biosciences University of Guelph Guelph Ontario Canada

Many chronic degenerative diseases have been linked to high intake of various trace and heavy metals. The presence of these compounds in drinking water may be a significant contributing factor to total dietary intake and deposition, resulting in the propagation of a disease cascade. Dairy farm families residing in rural Ontario completed a survey pertaining to the health status of the individuals living on-farm. Water samples were also collected at each location and analyzed for mineral content. Out of 200 surveys delivered to farms, 134 were returned, which formed a study group comprised of 218 adult and 230 children participants. Taking into consideration several factors, such as genetics, environment and diet, the data were analyzed for correlations between heavy metal and mineral status and the prevalence of neurodegenerative diseases. The findings from this study suggest phosphorus, potassium and magnesium concentrations may play a role in the development of neurodegenerative diseases. Total hardness and pH of water may also have an impact on the development of these diseases.

关键词： Trace Metals Heavy Metals Minerals Neurodegenerative Disease Water Quality