polycyclic aromatic hydrocarbons pahs
Effect of Surfactant on Degradation of Polycyclic Aromatic Hydrocarbons (pahs) in Thermophilic Anaerobic Co-Digestion of Sludge from Kim-Ngưu River and Organic Waste
... rings Ʃ PAHs PAHs Fig Final PAHs removal yields after different thermophilic anaerobic treatments in relation to the number of aromatic rings Conclusions The study showed the degradability of PAHs ... J.C Jimenez, A Guiraum, Temporal evolution of polycyclic aromatic hydrocarbons (PAHs) in sludge from wastewater treatment plants: Comparison between PAHs and heavy metals, Chemosphere 64 (2006) ... Biodegradation aspects of Polycyclic Aromatic Hydrocarbons (PAHs) : A review, Journal of Hazardous Materials 169 (2009) 1-15 Bach Quang Dung, Enhancement of intrinsic bioremendiation of PAHs- contaminated...
Ngày tải lên: 24/06/2015, 08:16
determination of polycyclic aromatic hydrocarbon pahs and aliphatic hydrocarbons in oysters by gc msms
... hydrocarbon standards (NIST1494 – C10-C34 hydrocarbons) and secondly a mixture of 16 PAH standards To evaluate method performance with combined aliphatic hydrocarbons and PAHs, spiking was carried out with ... aliphatic hydrocarbons plus 10 ng/g PAH mixture Top chromatogram shows m/z 57 for hydrocarbon profiling, while lower chromatograms are SRM traces for 16 individual PAHs Retention times for the 16 PAHs ... area ratios to characterize the source of hydrocarbon contamination 10.2 PAHs The occurrence of one or more of any of the 16 PAHs of food safety concern is indicated by the presence of transition...
Ngày tải lên: 09/09/2015, 09:38
Tài liệu Ambient air pollution by Polycyclic Aromatic Hydrocarbons (PAH). Position Paper pptx
... acknowledged Ambient Air Pollution by Polycyclic Aromatic Hydrocarbons (PAH) Position Paper July 27th 2001 Prepared by the Working Group On Polycyclic Aromatic Hydrocarbons PAH Position Paper July ... 14 European Commission KH-41-01-373-EN-N Ambient air pollution by Polycyclic Aromatic Hydrocarbons (PAH) Position Paper ISBN 92-894-2057-X OFFICE FOR OFFICIAL PUBLICATIONS ... Group In 1999 the European Commission, created a Working Group to review the knowledge on polycyclic aromatic hydrocarbons (PAH) in ambient air and to consider the need and implications of regulations...
Ngày tải lên: 17/02/2014, 11:20
Ambient Air Pollution by Polycyclic Aromatic Hydrocarbons (PAH): Position Paper Annexes pptx
... Emission of Polycyclic Aromatic Hydrocarbons in Sampling Areas of the German Environmental Specimen Bank Method for the Precise Measurement of Gaseous and particle-Associated Polycyclic Aromatic Hydrocarbons ... polycyclic aromatic hydrocarbons in urban air: a study in a medium traffic area in Rome, 1993-1998 Atmos Environ 33: 3739-3750 MENICHINI, E 1992 Urban air pollution by polycyclic aromatic hydrocarbons: ... on Air Quality Standards Polycyclic Aromatic Hydrocarbons London: The Stationery Office, 1999; 21 Contributions from other PAHs are expected to be small although some PAHs with similar levels...
Ngày tải lên: 15/03/2014, 16:20
Tropospheric Air Pollution: Ozone, Airborne Toxics, Polycyclic Aromatic Hydrocarbons, and Particles potx
... Sciences, Polycyclic Aromatic Hydrocarbons: Evaluation of Sources and Effects (National Academy Press, Washington, DC, 1983) 102 G Grimmer, Ed., Environmental Carcinogens: Polycyclic Aromatic Hydrocarbons: ... Respirable Mutagens and Carcinogens in Ambient Air: Atmospheric Transformations of PAHs Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous in our air environment (99– 103), being present as volatile, ... Academy of Sciences, Particulate Polycyclic Organic Matter (National Academy Press, Washington, DC, 1972) 100 A Bjørseth, Ed., Handbook of Polycyclic Aromatic Hydrocarbons (Dekker, New York, 1983)...
Ngày tải lên: 15/03/2014, 20:20
particle-scale characterization and mass transfer of polycyclic aromatic hydrocarbons from contaminated soil to organic sorbent
Ngày tải lên: 13/11/2014, 15:58
The influence of surfactants on the solubilization, extraction and biodegradation of model polycyclic aromatic hydrocarbons
... surfactant-based extraction process on the polycyclic aromatic hydrocarbons (PAHs) Third, explore the extraction mechanisms For this objective, the partition of model PAHs will be studied together with ... Time 154 xvii Chapter Introduction Chapter Introduction 1.1 Research Background Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous in the environment and have been of great environmental concern, ... 224 Appendix B 225 List of Publications 225 v SUMMARY Polycyclic aromatic hydrocarbons (PAHs) are highly toxic chemicals Their high hydrophobicity contributes to their...
Ngày tải lên: 16/09/2015, 17:11
báo cáo khoa học: " Transcriptional responses to polycyclic aromatic hydrocarbon-induced stress in Arabidopsis thaliana reveal the involvement of hormone and defense signaling pathways" pdf
... in higher plants exposed to polycyclic aromatic hydrocarbons and their N-heterocyclic derivatives Environ Toxicol Chem 2006, 25:3238-3245 Burritt DJ: The polycyclic aromatic hydrocarbon phenanthrene ... phytotoxicity and polycyclic aromatic hydrocarbon contamination in Salicornia fragilis Sci Total Environ 2007, 381:146-156 Oros DR, Ross JRM, Spies RB, Mumley T: Polycyclic aromatic hydrocarbon ... research, will be of great value in breeding and engineering plants for phytoremediation of polycyclic aromatic hydrocarbons Conclusions The microarray experiments and comparative analyses show that...
Ngày tải lên: 12/08/2014, 03:21
Soluble and stable near infrared dyes based on polycyclic aromatic compounds
... commercialized dyes, another extraordinary class of compounds, named polycyclic aromatic compounds such as polycyclic aromatic hydrocarbons (PAHs, also known as nanographenes), porphyrins, and BODIPY (4,4-difluoro-4-bora-3a,4a-diaza-s-indacene), ... with traditional cyanine and polyene dyes, polycyclic aromatics usually exhibit excellent chemical stability and photostability In addition, polycyclic aromatics hold the advantages such as low ... structural tunability over quantum dots Therefore, polycyclic aromatics appear to be promising candidates for NIR dyes However, most polycyclic aromatics are only capable of capturing the UV or...
Ngày tải lên: 10/09/2015, 08:36
phát triển dịch vụ tư vấn pahst hành chứng khoán tại công ty cổ phần chứng khoán Đông nam á
Ngày tải lên: 11/12/2012, 16:35
Thiết kế phân xưởng sản xuất aromatic từ LPT
... sản xuất Aromatic Từ LPG _ 3.3 Chất lƣợng sản phẩm sản lƣợng Các sản phẩm lỏng từ trình Cyclar Benzen, Toluen, Xylen (BTX), aromatic nặng Nhìn chung, làm tăng hiệu suất aromatic ... Hiếu_HD1001 19 ĐỒ ÁN TỐT NGHIỆP Thiết Kế Phân Xƣởng sản xuất Aromatic Từ LPG _ CHƢƠNG II Các phƣơng pháp sản xuất Aromatic Các sản phẩm hóa học nói chung đặc biệt sản phẩm ngành ... trình hydrocrackinh, trình làm giảm hiệu suất sản phẩm aromatic Nguyễn Văn Hiếu_HD1001 25 ĐỒ ÁN TỐT NGHIỆP Thiết Kế Phân Xƣởng sản xuất Aromatic Từ LPG _ Hiện UOP đƣa hai thiết...
Ngày tải lên: 23/04/2013, 22:51
Estimation of river discharge loadings of PAHs in a suburban river in Hiroshima Prefecture, Japan
... 2, 2009 review of atmospheric polycyclic aromatic hydrocarbons: Sources, fate and behavior, Water, Air, and Soil pollut., 60, 279-300 Dipple A., (1985) Polycyclic aromatic hydrocarbon carcinogenesis, ... individual PAHs for all the samplings was shown in Figure 12 For both dissolved and particulate PAHs, the composition ratio of lower molecular PAHs (Ace~Pyr) was higher than that of higher molecular PAHs ... 60 (a) Dissolved PAHs (b) Particulate PAHs Figure 12 - Averaged Composition Ratio of Individual PAH (Error bar represents standard deviation) Loadings of PAHs The loadings of PAHs for each precipitation...
Ngày tải lên: 05/09/2013, 09:38
Nghiên cứu xác định hàm lượng một số PAHs trong nước và bùn đất ở thôn trung sơn, xã hòa liên, hòa vang, đà nẵng bằng phương pháp sắc ký lỏng cao áp
... th c lơn cho s phát tri n b n v ng M t nh ng ch t ô nhi m ñ t c n ñư c quan tâm PAHs PAHs (Polycyclic Aromatic Hydrocarbons) h p ch t h u có hay nhi u vòng hydrocarbon thơm liên k t t o thành ... QUAN 1.1 T ng quan v PAHs 1.1.1 Gi i thi u PAHs 1.1.2 Tính ch t v t lý hóa h c c a PAHs 1.1.3 Gi i thi u m t s h p ch t thơm ña vòng quan tr ng PAHs 1.1.4 Hi n tr ng ô nhi m PAHs th gi i Vi t Nam ... tích hàm lư ng PAHs môi trư ng nư c 23 Hình 3.2 Quy trình phân tích hàm lư ng PAHs m u nư c 3.7 K t qu phân tích m u th c t 3.7.1 Phân tích m t s m u th c t B ng 3.20 Hàm lư ng PAHs c a m t s...
Ngày tải lên: 27/12/2013, 21:43
Tài liệu Báo cáo khoa học: Tryptophan tryptophylquinone cofactor biogenesis in the aromatic amine dehydrogenase of Alcaligenes faecalis Cofactor assembly and catalytic properties of recombinant enzyme expressed in Paracoccus denitrificans pptx
... univalent cations on the spectral properties of aromatic amine dehydrogenase Biochem J 329, 175–182 21 Hyun YL & Davidson VL (1995) Mechanistic studies of aromatic amine dehydrogenase, a tryptophan ... 0.01 0.02 0.02 0.02 0.02 ± ± ± ± ± ± ± ± ± ± ± 24 8.5 4.0 2.4 2.0 0.9 0.8 0.8 0.6 0.6 0.3 with aromatic amines such as tyramine, b-phenylethylamine and tryptamine [1,22] In a previous report, ... shown) and for recombinant AADH (data not shown) FEBS Journal 272 (2005) 5894–5909 ª 2005 FEBS The aromatic amine utilization (aau) gene cluster of A faecalis comprises nine genes (orf-1, aauBEDA,...
Ngày tải lên: 19/02/2014, 07:20
Tài liệu Báo cáo khoa học: Local stability identification and the role of a key aromatic amino acid residue in staphylococcal nuclease refolding pdf
... spectrum to that of the wild-type protein, but W140O did not (h 0) This may indicate that the aromatic F or Y in the W140A mutant are more ordered and compact than in the W140O protein Tryptophan...
Ngày tải lên: 20/02/2014, 01:20
Tài liệu Báo cáo khoa học: Electrostatic role of aromatic ring stacking in the pH-sensitive modulation of a chymotrypsin-type serine protease, Achromobacter protease I pdf
... DISCUSSION Aromatic ring stacking in the active sites of enzymes has been reported and possible connections with their catalytic functions have been considered [14,15] In most cases, however, aromatic ... Hurley, J.H., Nicholson, H., Baase, W.A & Matthews, B.W (1993) Hydrophobic core repacking and aromatic aromatic interaction in the thermostable mutant of T4 lysozyme Ser117 fi Phe Protein Sci 2, ... Rhizopus niveus at 2.0 A resolution J Mol Biol 255, 310–320 16 Burley, S.K & Petsko, G.A (1985) Aromatic aromatic interaction: a mechanism of protein structure stabilization Science 229, 23–28 17...
Ngày tải lên: 21/02/2014, 03:20
công nghệ cyclar sản xuất aromatic từ lpg
... trúc chất mang ) Sơ đồ công nghệ: I Aromatic Sơ đồ công nghệ: I Aromatic Chất lượng sản phẩm: • Sản phẩm chính: BTX (~91%) , aromatic nặng( ~9%) • TSL Aromatic khoảng từ 58% khối lượng với ... tính chất vòng thơm, đặc trưng phản ứng electrophyl SE ( alkyl hóa, nitro hóa…) I Aromatic Sơ đồ công nghệ I Aromatic I.4 Nguồn cung cấp Cốc hóa than đá Reforming xúc tác Naphtha Cracking ... trị thành dạng có nhu cầu lớn I Aromatic CCR Platforming UOP Quá trình reforming chọn lọc khí hóa lỏng ( LPG) thành sản phẩm HC thơm Sơ đồ công nghệ: I Aromatic Quá trình Cyclar: Chuyển...
Ngày tải lên: 23/02/2014, 14:23
Báo cáo khoa học: The Mycobacterium tuberculosis ORF Rv0654 encodes a carotenoid oxygenase mediating central and excentric cleavage of conventional and aromatic carotenoids doc
... Nieman K, Sorensen D, Issa B, Anderson AJ & Sims RC (2004) Isolation and characterization of polycyclic aromatic hydrocarbondegrading Mycobacterium isolates from soil Microb Ecol 48, 230–238 Booker ... subfamily of mycobacterial carotenoid cleavage oxygenases (Fig S4), we tested its activity on the aromatic carotenoid 3,3¢-dihydroxy-isorenieratene (3,3¢-dihydroxy-/, /-carotene) (Fig 2) As shown ... is a carotenoid cleavage oxygenase novel with respect to the cleavage pattern, the conversion of aromatic carotenoids and its mycobacterial origin The identified cyclic products suggested that MtCCO...
Ngày tải lên: 15/03/2014, 23:20
Đồ án: Thiết Kế Phân Xưởng sản xuất Aromatic Từ LPG pptx
... sản xuất Aromatic Từ LPG _ 3.3 Chất lƣợng sản phẩm sản lƣợng Các sản phẩm lỏng từ trình Cyclar Benzen, Toluen, Xylen (BTX), aromatic nặng Nhìn chung, làm tăng hiệu suất aromatic ... Hiếu_HD1001 19 ĐỒ ÁN TỐT NGHIỆP Thiết Kế Phân Xƣởng sản xuất Aromatic Từ LPG _ CHƢƠNG II Các phƣơng pháp sản xuất Aromatic Các sản phẩm hóa học nói chung đặc biệt sản phẩm ngành ... trình hydrocrackinh, trình làm giảm hiệu suất sản phẩm aromatic Nguyễn Văn Hiếu_HD1001 25 ĐỒ ÁN TỐT NGHIỆP Thiết Kế Phân Xƣởng sản xuất Aromatic Từ LPG _ Hiện UOP đƣa hai thiết...
Ngày tải lên: 17/03/2014, 20:21