14 resultados para MS4


Relevância:

10.00% 10.00%

Publicador:

Resumo:

Currently completing its fifth year, the Coastal Waccamaw Stormwater Education Consortium (CWSEC) helps northeastern South Carolina communities meet National Pollutant Discharge Elimination System (NPDES) Phase II permit requirements for Minimum Control Measure 1 - Public Education and Outreach - and Minimum Control Measure 2 - Public Involvement. Coordinated by Coastal Carolina University, six regional organizations serve as core education providers to eight coastal localities including six towns and cities and two large counties. CWSEC recently finished a needs assessment to begin the process of strategizing for the second NPDES Phase II 5-year permit cycle in order to continue to develop and implement effective, results-oriented stormwater education and outreach programs to meet federal requirements and satisfy local environmental and economic needs. From its conception in May 2004, CWSEC set out to fulfill new federal Clean Water Act requirements associated with the NPDES Phase II Stormwater Program. Six small municipal separate storm sewer systems (MS4s) located within the Myrtle Beach Urbanized Area endorsed a coordinated approach to regional stormwater education, and participated in a needs assessment resulting in a Regional Stormwater Education Strategy and a Phased Education Work Plan. In 2005, CWSEC was formally established and the CWSEC’s Coordinator was hired. The Coordinator, who is also the Environmental Educator at Coastal Carolina University’s Waccamaw Watershed Academy, organizes six regional agencies who serve as core education providers for eight coastal communities. The six regional agencies working as core education providers to the member MS4s include Clemson Public Service and Carolina Clear Program, Coastal Carolina University’s Waccamaw Watershed Academy, Murrells Inlet 2020, North Inlet-Winyah Bay National Estuarine Research Reserve’s Coastal Training and Public Education Programs, South Carolina Sea Grant Consortium, and Winyah Rivers Foundation’s Waccamaw Riverkeeper®. CWSEC’s organizational structure results in a synergy among the education providers, achieving greater productivity than if each provider worked separately. The member small MS4s include City of Conway, City of North Myrtle Beach, City of Myrtle Beach, Georgetown County, Horry County, Town of Atlantic Beach, Town of Briarcliffe Acres, and Town of Surfside Beach. Each MS4 contributes a modest annual fee toward the salary of the Coordinator and operational costs. (PDF contains 3 pages)

Relevância:

10.00% 10.00%

Publicador:

Resumo:

利用电喷雾串联质谱(ESI-MSn)系统地研究了乌头属植物和中药煎煮液中的乌头碱型生物碱的质谱行为。实验表明,ESI-MSn不仅是一种灵敏的药用植物中乌头生物碱的分析方法,也是研究中药配伍规律和阐释中药复方合理内涵的有效工具。低能诱导碰撞解离肠导下,具有乌头碱骨架类型的生物碱断裂规律相似:丢失C8乙酰基或长链脂肪酰基是它们在MSZ中的特征断裂,在MS3和MS4中丢失1-4CH3OH,1-3H2O,CO,BzOH,CH3(N)或C2H5(N)是其他所有可能的断裂方式,并且结构的微小差别也能在串联质谱中得到反映。利用这些规律分析了生附子、生草乌、生草乌花、生白山草乌和制雪上一支蒿中的生物碱,我们不仅发现所有已知的化合物,还部分表征了50余种新化合物,其中具有15C,17C,19C和ZOC饱和或不饱和脂肪酰基,以10-OH-中乌头碱和10-OH-乌头碱为骨架的脂碱以及三脂型脂碱为首次在乌头属植物中发现。该结果提出了脂类生物碱在乌头属植物中普遍存在的可能性。另一方面,我们发现中药煎煮液具有缓冲溶液的性质,酸性和糖是影响剧毒性双酯型生物碱水解的两个因素。在pH5.0-5.5和糖的存在下,大部分双酯型生物碱水解为苯甲酰单酯型生物碱,少部分被转为脂碱,在pH2.8到3.5之间(半夏等与附子禁用中药煎煮液的pH),双酯型生物碱十分稳定,既不水解,也不转为脂碱。这样,我们不仅解释了传统中医药配伍理论的合理内涵,也表明她可能.存在着不足。此外,脂碱难溶于水,大部分脂碱煎煮后仍残留在药材组织中。最后,为评价脂碱的抗癌效果,我们用在水相下合成了8-棕榈酰-苯甲酰乌头原碱,体外实验表明,0.001mg/ml的8-棕榈酰-苯甲酰乌头原碱对肝癌细胞SMMC-7721和黑色素瘤细胞B16即具有很强的杀伤作用,并且提示它们可能具有不同的作用机制。

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Fragmentation pathways of aconitine-type alkaloids were investigated by electrospray ionization/ion trap multistage tandem mass spectrometry. Low-energy collision-induced dissociation of protonated aconitines follows a dominant first step, the elimination of the C-8-substituent as acetic acid or fatty acid in MS2 spectra. Successive losses of 1-4 CH3OH molecules, 1-3 H2O, CO, benzoic acid, and CH3 or C2H5 (N-substituents) are all fragmentation pathways observed in MS3 and MS4 spectra. By applying knowledge of these fragmentation pathways to the aconitines in the ethanolic extract of aconite roots, all the known aconitines were detected and also 23 unknown aconitine-type alkaloids, in which the lipo-alkaloids containing residues of 15C, 17C and 19C saturated or unsaturated fatty acids were characterized. These odd-carbon-number fatty acid substituents have not been reported previously.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

A numerical adjoint model with TOPEX/POSEIDON (T/P) altimeter data was set up to investigate the shallow water tidal constituents in the Bohai Sea and the Yellow Sea. Shallow water tidal constituents W-4, MS4 and M-6) in the Bohai Sea and the Yellow Sea were first extracted from nearly 10 years of T/P data and then assimilated into a nonlinear barotropic tidal model by using adjoint method in order to fully describe the tides in this area. The general patterns of M-4 and MS4 solutions were in good agreement with those of Kang et al. (Cont. Shelf. Res. IS (1998) 739.) and Lefevre et al., (J. Geophys. Res. 105 (2000) 8707.). The RMS values for the principal constituents and coastal constituents were obviously less than those calculated by Kang et al. (1998) and Lefevre et al. (2000). It was shown that the calculated tidal constituents charts obtained in the present study were more accurate than those in other models. In the future the model will be applied to other coastal areas and some semi-enclosed seas. (C) 2004 Elsevier Ltd. All rights reserved.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Direct current observations in the Yellow Sea interior are very scarce due to intense fishing and trawling activities. Most previous studies on tides in the area were based on coastal measurements or satellite altimeter sea levels and have not been rigorously compared with direct measurements. In this paper, tidal currents are studied with current profiles from three bottom-moored Sontek Acoustic Doppler Profilers (ADPs) deployed in the southern Yellow Sea in summer of 2001 and 2003. The measured current series were dominated by tidal currents. Maximum velocities are between 40-80 cm/s at the mooring stations. M-2 current is the most dominant primary tidal constituent, while MS4 and M-4 are the most significant shallow water tides with much smaller amplitudes than the primary tides.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

本文依据收集到的392个地面验潮站8个主要分潮(M2、S2、K1、O1、N2、K2、P1及Q1)的调和常数,对现有7个全球大洋潮汐模式的准确度进行了检验,结果显示各模式在深海区域均达到了比较高的准确度,相互之间差别也不大。经验模式GOT00和CSR4.0、同化模式NAO99、反演同化模式TPXO7.0、数值同化模式FES2002和FES2004的M2分潮均方根偏差在3 cm左右,其它分潮(S2、K1、O1、N2、K2、P1及Q1)大约在1~2 cm。本文还依据中国近海18个岛屿的调和常数对其中的5个大洋潮汐模式的准确度进行了检验,结果表明,M2分潮均方根偏差在6~14 cm,明显高于大洋部分的偏差,其中日本国家天文台的潮汐模式NAO99在中国近海的结果相对较准确。 我们利用1992年8月至2008年8月的TOPEX/POSEIDON和JASON-1(T/P-J)卫星高度计资料,对沿卫星轨道的302816个站点进行了14个分潮的潮汐调和分析,得到了全球大洋潮汐的8个主要分潮以及2个气象分潮Sa、Ssa的经验同潮图。主要结果有:(1)各分潮在卫星上升轨道与下降轨道的交叉点(约7000个)相关性分析表明:M2分潮的振幅和迟角的相关系数很高(分别为0.9965和0.9961);S2,K1,O1和Sa分潮也有较好的相关性(相关系数为0.94~0.99);(2)该结果与392地面个验潮站吻合较好,其中M2分潮的振幅、迟角和向量的均方根偏差分别为:1.73 cm,2.340和2.93 cm;S2,K1和O1分潮的振幅、迟角和向量的均方根偏差为1 cm左右,5.250~7.270和1.5~2.1 cm,该精度与最近几年国际上的主要大洋潮汐模式的准确度相近;(3)首次通过卫星资料获得了Sa、Ssa分潮的同潮图。周期为1年的Sa分潮与大洋105个地面站相比,振幅、迟角和向量的均方根偏差分别为1.50 cm、18.360和2.16 cm。在此基础上,进一步分析了构成Sa、Ssa气象分潮的两个主要因素(海水密度以及海面气压)在全球的分布。 在T/P-J等卫星资料无法覆盖到南大洋和北冰洋,本文利用Princeton Ocean Model(POM)进行了数值模拟,模拟结果与162个地面实测站(其中南大洋30个,北冰洋132个)的观测比较一致。基于卫星资料分析的结果和数值模拟结果合并得到了全球大洋的8个主要分潮同潮图。在此基础上通过全球潮汐能量耗散的计算得到潮能通量的分布,并得到全球M2、S2、K1和O1分潮的潮汐能量耗散率为2.431TW、0.401TW、0.336TW和0.176TW。 本文还利用卫星资料对南海潮汐进行了研究,在中国南海,获得了主要的半日潮、全日潮、四分日分潮和长周期分潮(M2,S2,N2,K2,K1,O1,P1,Q1,M4, MS4,Sa, Ssa)的经验同潮图。与南海沿岸94个地面验潮站的数据符合得比较好,M2,S2,K1及O1等4个主要分潮的平均振幅差为2~4 cm,均方根偏差分别是9~11 cm.其它4个主要分潮N2,K2,P1,Q1的平均振幅差为1~2 cm,均方根偏差为2~4 cm。此外,本文还利用卫星高度计资料潮汐分析结果沿卫星轨道进行高通滤波,分离得出中国近海的M2,S2,K1及O1分潮的内潮信息。

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Air quality is an increasing concern of the European Union, local authorities, scientists and most of all inhabitants that become more aware of the quality of the surrounding environment. Bioaerosols may be consisted of various elements, and the most important are pollen grains, fungal spores, bacteria, viruses. More than 100 genera of fungal spores have been identified as potential allergens that cause immunological response in susceptible individuals. Alternaria and Cladosporium have been recognised as the most important fungal species responsible for respiratory tract diseases, such as asthma, eczema, rhinitis and chronic sinusitis. While a lot of attention has been given to these fungal species, a limited number of studies can be found on Didymella and Ganoderma, although their allergenic properties were proved clinically. Monitoring of allergenic fungal spore concentration in the air is therefore very important, and in particular at densely populated areas like Worcester, UK. In this thesis a five year spore data set was presented, which was collected using a 7-day volumetric spore trap, analysed with the aid of light microscopy, statistical tests and geographic information system techniques. Although Kruskal-Wallis test detected statistically significant differences between annual concentrations of all examined fungal spore types, specific patterns in their distribution were also found. Alternaria spores were present in the air between mid-May/mid-June until September-October with peak occurring in August. Cladosporium sporulated between mid-May and October, with maximum concentration recorded in July. Didymella spores were seen from June/July up to September, while peaks were found in August. Ganoderma produced spores for 6 months (May-October), and maximum concentration could be found in September. With respect to diurnal fluctuations, Alternaria peaked between 22:00h and 23:00h, Cladosporium 13:00-15:00h, Didymella 04:00-05:00h and 22:00h-23:00h and Ganoderma from 03:00h to 06:00h. Spatial analysis showed that sources of all fungal species were located in England, and there was no evidence for a long distance transport from the continent. The maximum concentration of spores was found several hours delayed in comparison to the approximate time of the spore release from the crops. This was in agreement with diurnal profiles of the spore concentration recorded in Worcester, UK. Spores of Alternaria, Didymella and Ganoderma revealed a regional origin, in contrast to Cladosporium, which sources were situated locally. Hence, the weather conditions registered locally did not exhibit strong statistically significant correlations with fungal spore concentrations. This has had also an impact on the performance of the forecasting models. The best model was obtained for Cladosporium with 66% of the accuracy.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Um die in der Atmosphäre ablaufenden Prozesse besser verstehen zu können, ist es wichtig dort vorhandene Partikel gut charakterisieren zu können. Dazu gehört unter anderem die Bestimmung der chemischen Zusammensetzung der Partikel. Zur Analyse insbesondere organischer Partikel wurde dazu in einer früheren Promotion das Aerosol-Ionenfallen-Massenspektrometer (AIMS) entwickelt.Im Rahmen dieser Arbeit wurden Entwicklungsarbeiten durchgeführt, um die Charakteristiken des Prototypen zu verbessern sowie es für den Feldeinsatz tauglich zu machen. Die durchgeführten Veränderungen betreffen mechanische und elektrische Komponenten sowie das LabView Steuerungsprogramm. So wurde z.B. die Ionenquelle derart modifiziert, dass die Ionen nicht mehr permanent erzeugt werden, sondern nur innerhalb des Zeitraums wenn sie auch in der Ionenfalle gespeichert werden können. Durch diese Modifikation konnte das Signal-zu-Rausch Verhältnis deutlich verbessert werden. Nach Beendigung der Umbauten wurden in ausführlichen Laborstudien die einzelnen Instrumentenparameter detailliert charakterisiert. Neben den Spannungen die zur Fokussierung oder zur Speicherung der Ionen in der Ionenfalle dienen, wurden die unterschiedlichen Arten der resonanten Anregung, mittels der die Ionen in der Ionenfalle gezielt zu Schwingungen angeregt werden können, sehr genau untersucht. Durch eine gezielte Kombination der unterschiedlichen Arten der resonanten Anregung ist es möglich MSn-Studien durchzuführen. Nach erfolgreicher Charakterisierung konnte in weiteren Laborstudien die MSn-Fähigkeit des AIMS demonstriert werden. Für Tryptophan (C11H12N2O2) wurde anhand von MS4-Studien ausgehend von m/z 130 ein möglicher Fragmentierungsweg identifiziert. Für die einzelnen Stufen der MS4-Studien wurden die Nachweisgrenzen abgeschätzt. Im Rahmen der PARADE (PArticles and RAdicals: Diel observations of the impact of urban and biogenic Emissions) Messkampagne im August/September 2011 auf dem kleinen Feldberg in der Nähe von Frankfurt am Main wurde die Feldtauglichkeit des AIMS demonstriert. Die Nachweisgrenzen liegen für eine Mittelungszeit von 60 Minuten für Organik bei 1,4 µg m-3, für Nitrat bei 0,5 µg m-3 und für Sulfat bei 0,7 µg m-3, was ausreichend ist um atmosphärisches Aerosol messen zu können. Dies ist ein signifikanter Fortschritt im Vergleich zum Prototypen, der aufgrund schlechter Reproduzierbarkeit und Robustheit noch nicht feldtauglich war. Im Vergleich zum HR-ToF-AMS, einem Standard-Aerosolmassenspektrometer, zeigte sich, dass beide Instrumente vergleichbare Trends für die Spezies Nitrat, Sulfat und Organik messen.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Neospora caninum is one of the most significant parasitic organisms causing bovine abortion worldwide. Despite the economic impact of this infection, relatively little is known about the genetic diversity of this parasite. In this study, using Nc5 and ITS1 nested PCR, N. caninum has been detected in 12 brain samples of aborted fetuses from 298 seropositive dairy cattle collected from four different regions in Tehran, Iran. These specimen (Nc-Iran) were genotyped in multilocus using 9 different microsatellite markers previously described (MS4, MS5, MS6A, MS6B, MS7, MS8, MS10, MS12 and MS21). Microsatellite amplification was completely feasible in 2 samples, semi-completely in 8 samples, and failed in 2 samples. Within the two completely performed allelic profiles of Nc-Iran strains, unique multilocus profiles were obtained for both and novel allelic patterns were found in the MS8 and MS10 microsatellite markers. The Jaccard's similarity index showed significant difference between these two strains and from other standard isolates derived from GenBank such as Nc-Liv, Nc-SweB1, Nc-GER1, KBA1, and KBA2. All samples originating from the same area showed identical allelic numbers and a correlation between the number of repeats and geographic districts was observed.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

La investigación de un “objeto arquitectónico” enlaza con los principios teóricos desde los que en ARKRIT-LAB se entiende la crítica la arquitectura: la obra antes que el autor y su descripción antes que su interpretación. Consecuentemente, se propuso estudiar un edificio relevante y considerado de gran impacto teórico y mediático, entrando primero de manera precisa en su respuesta al medio, al material, a la medida, a la morfología y a la misión -metodo M3- y proponiendo después, entre los investigadores del laboratorio diversas actividades: re exionar de manera abierta sobre las condiciones de su “arquitectura”, experimentar el edi cio, rastrear sus antecedentes e investigar en la materia concreta y en las formas utilizadas; actividades que buscaban nuevas realidades que pudieran mostrar otras visiones. En el laboratorio consideramos que como arquitectos y como críticos, no resulta super uo aprender a ver más, a oír más, a sentir más y a pensar más4. El edificio elegido para el curso 2010-2011 fue la “Casa da Musica” de Oporto, proyecto de OMA-Rem Koolhaas, siendo el texto que se convirtió en referencia para la primera aproximación el titulado “Otra Modernidad” de Rafael Moneo. Texto en el que se describe el proyecto como encarnación de los nuevos atributos de la arquitectura contemporánea5. “Otra Modernidad” entendida desde la Modernidad, como frontera considerada por Antonio Miranda como referente de progreso y faro de toda acción arquitectónica. Modernidad como anhelo de una sociedad nueva más justa.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Illegal dumping and improper disposal of pollutants in urban areas can contribute significant pollutant loads to the municipal separate storm sewer system (MS4) and natural environments. Illicit discharges to the MS4 can pose a significant risk to human and environmental health. The Clean Water Act requires that municipalities implement a legal mechanism and plan to detect and eliminate illicit discharges to the MS4. The methodology for program creation included the analysis of other municipal illicit discharge programs, review of state and federal guidance publications, and the review of illicit discharge case-studies. This paper describes a systematic approach applied to the creation and implementation of a legal ordinance and program manual designed for the purpose of illicit discharge detection and elimination (IDDE).

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Environmental degradation from point and non-point source pollution in the past ten years has made it increasingly clear that threats to aquatic resources cannot adequately be addressed without a more integrated watershed approach to the management. Through comprehensive, qualitative interviews of experts in the watershed approach in South Carolina, recommendations will be made to improve this holistic process. Conducting interviews to compile institutional knowledge on the incentives and barriers from professionals working within the watershed approach will show how managing the natural resources in South Carolina could be more effective and efficient. By gathering experiences of lessons learned, best approach techniques, and suggestions for future watershed planning, several recommendations were made to further the use of the watershed approach in South Carolina.