Polar compounds in diesel soot and historic monument surfaces

2013 ◽  
Vol 33 (12) ◽  
pp. 1965-1973
Author(s):  
Yi ZHU ◽  
Hao PAN ◽  
Shanhu CHEN ◽  
Shidan WANG ◽  
Ming ZHAO ◽  
...  

1978 ◽  
Vol 253 (12) ◽  
pp. 4214-4218
Author(s):  
R.C. Reuben ◽  
P.L. Khanna ◽  
Y. Gazitt ◽  
R. Breslow ◽  
R.A. Rifkind ◽  
...  

2021 ◽  
Vol 550 ◽  
pp. 149351
Author(s):  
Tianxia Liu ◽  
Jian Wang ◽  
Kai Kang ◽  
Jian Qin ◽  
Zhanqi Tang

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jessica Moraes Malheiros ◽  
Banny Silva Barbosa Correia ◽  
Caroline Ceribeli ◽  
Daniel Rodrigues Cardoso ◽  
Luiz Alberto Colnago ◽  
...  

AbstractWe conducted a study to identify the fecal metabolite profile and its proximity to the ruminal metabolism of Nelore steers based on an untargeted metabolomic approach. Twenty-six Nelore were feedlot with same diet during 105 d. Feces and rumen fluid were collected before and at slaughter, respectively. The metabolomics analysis indicated 49 common polar metabolites in the rumen and feces. Acetate, propionate, and butyrate were the most abundant polar metabolites in both bio-samples. The rumen presented significantly higher concentrations of the polar compounds when compared to feces (P < 0.05); even though, fecal metabolites presented an accentuated representability of the ruminal fluid metabolites. All fatty acids present in the ruminal fluid were also observed in the feces, except for C20:2n6 and C20:4n6. The identified metabolites offer information on the main metabolic pathways (higher impact factor and P < 0.05), as synthesis and degradation of ketone bodies; the alanine, aspartate and glutamate metabolisms, the glycine, serine; and threonine metabolism and the pyruvate metabolism. The findings reported herein on the close relationship between the ruminal fluid and feces metabolic profiles may offer new metabolic information, in addition to facilitating the sampling for metabolism investigation in animal production and health routines.


2001 ◽  
Vol 32 ◽  
pp. 421-422
Author(s):  
K.-H. NAUMANN ◽  
H. SAATHOFF ◽  
M. SCHNAITER ◽  
U. SCHURATH

2021 ◽  
Vol 169 ◽  
pp. 105485
Author(s):  
Sisi Yang ◽  
Bertan Ozdogru ◽  
Cameron Ketelsleger ◽  
Darrell Gregory ◽  
Ömer Özgür Çapraz ◽  
...  

Atmosphere ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 768
Author(s):  
Natalia Zioła ◽  
Kamila Banasik ◽  
Mariola Jabłońska ◽  
Janusz Janeczek ◽  
Barbara Błaszczak ◽  
...  

Raman microspectroscopy and thermo-optical-transmittance (TOT) method were used to study airborne ambient soot collected at the suburban air monitoring station in southern Poland during the residential heating (January-February) and non-heating (June–July) seasons of 2017. Carbonaceous material constituted on average 47.2 wt.% of PM2.5 during the heating season and 26.9 wt.% in the non-heating season. Average concentrations of OC (37.5 ± 11.0 μg/m3) and EC (5.3 ± 1.1 μg/m3) during the heating season were significantly higher than those in the non-heating season (OC = 2.65 ± 0.78 μg/m3, and EC = 0.39 ± 0.18 μg/m3). OC was a chief contributor to the TC mass concentration regardless of the season. All Raman parameters indicated coal combustion and biomass burning were the predominant sources of soot in the heating season. Diesel soot, which is structurally less ordered than soot from other sources, was dominant during the non-heating season. The D1 and G bands area ratio (D1A/GA) was the most sensitive Raman parameter that discriminated between various soot sources, with D1A/GA > 1 for diesel soot, and less than 1 for soot from coal and wood burning. Due to high daily variability of both TOT and Raman spectroscopy data, single-day measurements can be inconclusive regarding the soot source apportionment. Long-time measurement campaigns are recommended.


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