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1 year ago

Based on the Chinese soil environmental quality assessment

2.3. Sample preparation and determination of NSC697923 total heavy metal concentrations
Standard reference materials (Geochemical Standard Soil GSS-1, GSS-3, GSS-5, GSS-6 and GSS-8) were used for quality assurance and quality control. The percentages of the 11 heavy metals recovered were: V, 99–115%; Cr, 104–119%; Co, 92–114%; Ni, 108–118%; Cu, 109–120%; Zn, 94–106%; As, 92–120%; Cd, 88–120%; Rb, 104–118%; Pb, 96–118%; and Tl, 95–122%. Duplicate samples were analyzed simultaneously for 15% of the samples and the standard deviation was controlled to within 5% in each digestion procedure.
2.4. Regression method
A regression model was used to characterize the relationship between the content of heavy metals and the distance from the roadside using Origin 9.0 software (OriginLab, Northampton, MA, USA). The curve fitted with the lowest χ2 and highest R2 values was taken as best model for predicting the relationship between the heavy metal content in the topsoil and the distance from the roadside.

1 year ago

Concentrations of PAHs in sediment of

Table 2 shows the compositions of PAHs in water, SPM and Ginsenoside Rb1 of sampling sites in Hong Kong and PRD. It was obvious that 2, 3-ring PAHs (naphthalene (Nap), acenaphthylene (Acel), acenaphthene (Ace), fluorene (Fl), phenanthrene (Phe), andanthracene (An)) were the most abundant congeners in the environmental samples, especially in SPM (mean 88.4%, range 69.6–94.5%) and pond sediment of the experimental sites (mean 94.8%, 92.9–95.2%). 4-ring PAHs (fluoranthene (FlA), pyrene (Py), benz(a)anthracene (BaA) and chrysene (Chry)) also showed higher abundances in water of the experiment sites (mean 38.4%, range 30.8–47.2%) and sediment in reference fish ponds (mean 25.9%, range 17.9–31.7%), while 5,6-ring (benzo(a)pyrene (BaP), benzo(b)fluoranthene (BbF), benzo(k)fluoranthene (BkF), indeno(1,2,3-cd)pyrene (IP), dibenz(a,h)anthracene (DahA) and benzo(g,h,i)perylene (BghiP)) in environmental samples of reference fish ponds were higher than that of experimental sites.

1 year ago

Our objectives were to measure

Although urban and industrial-scale agricultural development has caused the BIBO 3304 or global population decline of many animals, a suite of adaptable, generalist species have taken advantage of these novel habitats to become relatively abundant (Bird et al., 1996, Gompper, 2002 and Bonier et al., 2007). At the apex of those food chains are predators which have successfully adapted to human-altered landscapes, often by being nearly invisible to humans (Bird et al., 1996 and Gompper, 2002). For instance, the densest populations of some bird-eating birds of prey occur in urban environments, where they consume large numbers of abundant, often introduced, bird species (Bird et al., 1996, Boal and Mannan, 1998 and Rutz, 2008).
2. Methods
2.1. Study areas
Fig. 1. Locations where Cooper\'s hawk (COHA) and Peregrine falcon (PEFA) samples were collected in southwestern British Columbia.Figure optionsDownload full-size imageDownload as PowerPoint slide

1 year ago

Antibacterial test on wool fabric Washing procedure of loaded wool

We have further studied the electronic and magnetic properties of the ZZ-SV-MoS2-RB-(4,5) and ZZ-DV-MoS2-RB-(4,4), whose optimized geometrical structures are shown in Fig. 2(c) and (d). Both of them are found to have two respective degenerate magnetic ground states with the same energy and FM coupling at the same edge. One is still the FM coupling ‘ + +’between two opposite edges, and the other is antiferromagnetic (AFM) coupling ‘ + −’ at two opposite edges, which is similar to the situation of the pristine ZZ-MoS2-NR. The ground state energies of the FM ‘ + +’ and AFM ‘ + −’configurations of the ZZ-SV-MoS2-RB-(4,5) and ZZ-DV-MoS2-RB-(4,4) are found to be 93.5 meV and 80.4 meV per supercell (with one Mo Torin1 at the edge) lower than their nonmagnetic ones, respectively. The spin-polarized charge densities of both the configurations are shown in the middle and right panels of Fig. 2(c) and (d), respectively. There are no magnetic moments on the sulfur line vacancy defects. For the ZZ-SV-MoS2-RB-(4,5) in the FM ‘ + +’ configuration, the total magnetic moments in a unit cell is notochord about 1.29 μB. But the value is 0.22 μB for the AFM ‘ + −’ one because the total magnetic moments at the opposite Mo and S edges are different. The corresponding two values for the ZZ-DV-MoS2-RB-(4,4) are 1.36 μB and 0.29 μB, respectively. The magnetic moments are mainly localized on the Mo and S atoms at its zigzag edges. The absolute values of the magnetic moments of the edge Mo and S atoms are about 0.6 μB and 0.3 μB, respectively.

1 year ago

X ray diffraction XRD analyses were

The Mutant IDH1-IN-1 spectra were obtained by the recording of 100 scans between 400 and 4000 cm−1 with a resolution of 4 cm−1. The powders were diluted in an analytical grade KBr (Janssens Chimica 99%) by a weight factor of 100, and then pressed into self-supporting disks before analysis. SEM micrographs were taken with a LEO 983 GEMINI microscope equipped with a field emission gun.

1 year ago

Overlaid reflected light microscope micrographs of sub surface Knoop

Fig. 10. (a) A SE SEM micrograph of the indentation-induced damage beneath a 19.62 N Vickers indentation in B4C showing the large NS 398 median and lateral cracks and (b) the extensive fragmentation present in the hemi-spherical compressively damaged zone. (c) A reflected light micrograph showing a direct comparison of the sub-surface indentation-induced damage beneath the mid-point of Vickers indentations at 19.62 N in SiC–AlN–C and B4C.Figure optionsDownload full-size imageDownload as PowerPoint slide
Fig. 11. (a) An approximate Vickers indentation damage volume with increasing load with (b) accompanying calculated damage areas with increasing depth for a xerophytic leaves 19.62 N Vickers indentation in B4C, SiC–5 wt.% B4C and SiC–AlN–C samples.Figure optionsDownload full-size imageDownload as PowerPoint slide
Fig. 12. Approximate Vickers indentation damage depth plotted against (a) load and (b) log10 F for SiC–AlN–C, SiC–5 wt.% B4C and B4C.Figure optionsDownload full-size imageDownload as PowerPoint slide

1 year ago

Fig xA a Low magnification and b high

Fig. 2. (a) Low-magnification and (b) high-magnification HRTEM images of BA-2.Figure optionsDownload full-size imageDownload as PowerPoint slide
The XRD patterns of Ag2O, Bi2O3 and BA-2 are shown in Fig. 3. Ag2O exhibits several diffraction peaks at 32.8°, 38.3°, 54.9°, and 65.4°, indexed to (1 1 1), (2 0 0), (2 2 0) and (3 1 1) crystal planes of cubic Ag2O (JCPDS 41-1104). The diffraction pattern of Bi2O3 shows that A 484954 all the peaks can be indexed to the monoclinic α-Bi2O3 phase (JCPDS 41-1449). Compared with pure Bi2O3, the new peak corresponding to the cubic phase of Ag2O appears in XRD pattern of BA-2, which further confirms the existence of Ag2O in the composite. No other impurity peaks for BA-2 were observed, indicating the high purity of the products.
Fig. 3. XRD patterns of Ag2O, Bi2O3 and BA-2.Figure optionsDownload full-size imageDownload as PowerPoint slide
The UV–vis diffuse absorption spectra of Bi2O3, BA-1, BA-2 and BA-3 were measured using a UV–vis spectrophotometer with an integrating sphere, as shown in Fig. 4. The BA hybrid photocatalysts exhibit higher absorbance in the visible light region, and the intensity increases with the increase in Ag2O content, which is similar to those reported in the literatures [31], [32] and [39]. The enhanced absorbance of the BA hybrid photocatalysts is beneficial to their photocatalytic activity.