Determination of non-homogeneous high-concentration depth distributions using elastic backscattering data

1982 ◽  
Vol 28 (1) ◽  
pp. 25-33 ◽  
Author(s):  
M. Braun ◽  
R. Brewer ◽  
H. Stuessi ◽  
S. Vepřek
Keyword(s):  
High Concentration ◽  
Elastic Backscattering ◽  
Depth Distributions

scholarly journals UPLC-MS/MS Determination of Linezolid and Heme in Plasma of Infected Patients and Correlation Analysis

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Yingying Wang ◽  
Xuemei Ye ◽  
Qin Lan ◽  
Xiaofang Ke ◽  
Lufeng Hu ◽  
...  
Keyword(s):  
Correlation Analysis ◽  
Healthy Subjects ◽  
Haematological Toxicity ◽  
Diagnostic Value ◽  
High Concentration ◽  
High Positive Correlation ◽  
Positive Correlation ◽  
Early Diagnose ◽  
The Relationship

Linezolid can cause serious haematological toxicity, such as thrombocytopenia and aneamia. Heme, composed of iron and porphyrin, is an important component of hemoglobin. In order to investigate the relationship between the concentration of linezolid and heme in the plasma of infected patients, a UPLC-MS/MS method that can determine the concentrations of linezolid and heme simultaneously was developed and validated. A total of 96 healthy subjects and 81 infected patients, who received blood routine blood tests, were included and determined by the UPLC-MS/MS method. The results showed that the concentration of linezolid was 5.08 ± 3.46   μ g / mL in infected patients who were treated with linezolid. The heme in healthy subjects was 7.05 ± 8.68   μ g / mL , and it was significantly decreased to 0.88 ± 0.79   μ g / mL in infected patients ( P < 0.01 ). Spearman correlation analysis showed that linezolid had a high negative correlation with platelet (PLT) ( R = − 0.309 ). Heme had a high positive correlation with hemoglobin (Hb) ( R = 0.249 ) in healthy subjects and infected patients. The ROC analysis showed that heme had diagnostic value to distinguish low Hb (110 g/L). In conclusion, there was a positive correlation between heme and Hb, and this correlation was also observed in infected patients. A high concentration of linezolid was inclined to decrease PLT. Monitoring of heme and linezolid helps in the early diagnose of low Hb and PLT.

scholarly journals A Social Network-Based Examination on Bid Riggers’ Relationships in the Construction Industry: A Case Study of China

Buildings ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 363
Author(s):  
Liang Xiao ◽  
Kunhui Ye ◽  
Junhong Zhou ◽  
Xiaoting Ye ◽  
Ramadhani Said Tekka
Keyword(s):  
Social Network ◽  
Construction Industry ◽  
Small Scale ◽  
High Concentration ◽  
Market Shares ◽  
The Social ◽  
Network Method ◽  
Solid Foundation

Collusive bidding has been an insidious issue in the construction industry. Bidders initiate collusive networks of various sizes to win market shares. The popularity of collusive bidding networks affects market fairness and erodes the interests of market players. Although considerable research efforts were made to diagnose collusive bidding networks, there remains a gap in knowledge regarding the relationships bid riggers use to engage in the networks. Therefore, this study used the social network method, where two hundred sixteen collusion cases were collected from China to test these relationships. The results show that collusive bidding networks were characterized by sparseness, a small scale, a high concentration, and strong randomness. Three types of collusive bidding networks were also detected: contractual, spontaneous, and shadow. Furthermore, these collusive bidding networks had discrepancies regarding participants’ identities, forms of collusive bids, and the determination of bid winners. It was found that the proposed social network model of deliberating bid riggers’ relationships lays a solid foundation for the detection of collusive bidding in the construction sector.

scholarly journals TRANSPORT BEHAVIOR OF Cr(III), Cd(II), Pb(II), AND Ag(I) IONS THROUGH BULK LIQUID MEMBRANE CONTAINING p-tert-BUTYLCALIX[4]ARENE–TETRADIETHYLACETAMIDE AS ION CARRIER

2010 ◽  
Vol 8 (3) ◽  
pp. 300-306 ◽  
Author(s):  
Maming Maming ◽  
Jumina Jumina ◽  
Dwi Siswanta ◽  
Hardjono Sastrohamidjojo ◽  
Keisuke Ohto
Keyword(s):  
Optimum Condition ◽  
Liquid Membrane ◽  
Bulk Liquid ◽  
High Concentration ◽  
Bulk Liquid Membrane ◽  
Transport Efficiency ◽  
Transport Behavior ◽  
Source Phase ◽  
Ion Carrier

The study on the transport behavior of Cr(III), Cd(II), Pb(II), and Ag(I) through bulk liquid membrane using p-tert-butylcalix[4]arene-tetradiethylacetamide as ions carrier has been conducted. The aims of this work are to determine the optimum condition, efficiency, and transport selectivity of the carriers for those ions. Both optimum condition and transport efficiency were obtained by determination of the concentration of transported ions with variation of the source phase pH, ion carrier concentration, the nature of decomplexant agent in the receiving phase, and transport time. The transport selectivity of the ion carrier was obtained from the ions competition transport experiments. The amount of Cr(III), Pb(II), Cd(II), and Ag(I) transported across liquid membrane were 11.6, 25.5, 39.5, and 42.1% respectively. The ion carrier is selective for Cd(II), Pb(II), Ag(I), and strongly depends on the nature of decomplexant agent as well as transport mechanism. The remarkable selectivity was shown by the ion carrier to Ag(I) when the transport process was carry out under high concentration of acid in the source phase.   Keywords: transport, p-tert-butylcalix[4]arene-tetradiethylacetamide, efficiency, selectivity, bulk liquid membrane, heavy metals

Differential growth performance and intestinal immune gene expression in diverse genetic lines of growing chickens fed a high concentration of supplemental phytase

2018 ◽  
Vol 156 (2) ◽  
pp. 258-264
Author(s):  
S. Q. Jiang ◽  
S. J. Lamont ◽  
M. E. Persia
Keyword(s):  
Growth Performance ◽  
Average Daily Gain ◽  
Immune Gene ◽  
High Concentration ◽  
Differential Growth ◽  
Mucin 2 ◽  
Polymerase Chain ◽  
High Concentrations ◽  
Significant Line

AbstractThe objective of the current experiment was to determine the effects of high-concentration phytase (5000 FTU/kg) feeding to diverse lines of chickens fed phosphorus (P) adequate maize–soybean meal diets (4.5 g/kg non-phytate P) on the performance and intestinal immune function. Performance was measured for outbred broiler (Ross 308) and inbred Fayoumi lines over 0–21 days, and duodenum and ileum were harvested for the determination of mucin-2, interleukin (IL)-1βand IgA mRNA by quantitative reverse transcription polymerase chain reaction. Over the 0–7-day period, there was a significant line × diet interaction, as high phytase supplementation increased broiler average daily gain (ADG), but had no effect on Fayoumi ADG. Treatment of diets with phytase increased expression of the mucin-2 gene in the duodenum mucosa. There were significant interactions between line and age, and line, diet and age on duodenal expression of the IL-1βgene as phytase supplementation of the broiler line reduced IL-1βin comparison to control fed broilers without change in the Fayoumi line. Overall, the addition of a high concentration of phytase to broilers fed adequate concentrations of non-phytate P resulted in improved growth performance early with a reduction in this effect over time. Mucosal mucin-2 expression was increased with high-concentration phytase feeding across both lines, but IL-1βmRNA expression was reduced in the duodenum of broilers fed high concentrations of phytase, suggesting that the increased performance noted might be related to decreased inflammation.

Specific serum pancreatic lipase determination, with use of purified colipase.

1980 ◽  
Vol 26 (12) ◽  
pp. 1732-1733 ◽  
Author(s):  
G E Hoffmann ◽  
L Weiss
Keyword(s):  
Bile Acids ◽  
Lipoprotein Lipase ◽  
Pancreatic Lipase ◽  
High Concentration ◽  
Turbidimetric Method ◽  
Specific Serum

Abstract We show that the turbidimetric method of Ziegenhorn et al. (Clin. Chem. 25: 1067, 1979) for determination of pancreatic lipase is not influenced by lipoprotein lipase. This improved specificity as compared to standard lipase methods is explained by the presence of purified colipase and the high concentration of bile acids in the substrate emulsion.

scholarly journals Distribution and Fractionation of Heavy Metals in Sediments of Karra River, Hetauda, Nepal

2015 ◽  
Vol 19 (2) ◽  
pp. 123-128 ◽  
Author(s):  
Sadhana Pradhanang
Keyword(s):  
River Sediment ◽  
Total Concentration ◽  
Extraction Procedure ◽  
Residual Fraction ◽  
High Concentration ◽  
Metal Concentrations ◽  
Mn Oxide ◽  
Fractionation Analysis ◽  
Polluted Sites

A five-step sequential extraction procedure was applied for the determination of the distribution of four elements (Cr, Mn, Fe, and Ni) in sediment of the Karra River. Sediment samples were collected from 16 different sites in the Karra River (upstream, industrial belt, downstream). The distribution of trace metals among exchangeable, carbonate, reducible, oxidizable and residual fractions were determined. The total concentration of metals varies in the range of Cr 72–4339.54 mg kg?1, Mn 22–411.93 mg kg?1, Fe 2967.23-32423.0 mg kg?1 and Ni 31.70-180.74 mg kg?1. The accuracy evaluated by comparing total trace metal concentrations with the sum of the five individual fractions proved to be satisfactory. The chemical speciation of Cr, Mn, Fe, and Ni in most sampling stations were in the order of residual > reducible > oxidazable > carbonate> exchangeable. Fractionation analysis showed that dominant metals are in residual fraction. The highest metal concentrations were observed at the most polluted sites of the industrial belt. High concentration of chromium was found in the Fe-Mn oxide and organic fraction in some of the sites of industrial belt.Journal of Institute of Science and Technology, 2014, 19(2): 123-128

Analysis of the Electron Traps at the 4H-SiC/SiO2 Interface of a Gate Oxide Obtained by Wet Oxidation of a Nitrogen Pre-Implanted Layer

2009 ◽  
Vol 615-617 ◽  
pp. 533-536
Author(s):  
Ioana Pintilie ◽  
Francesco Moscatelli ◽  
Roberta Nipoti ◽  
Antonella Poggi ◽  
Sandro Solmi ◽  
...  
Keyword(s):  
Low Frequency ◽  
Gate Oxide ◽  
High Accuracy ◽  
Interface Trap Density ◽  
Interface Trap ◽  
High Concentration ◽  
Mos Capacitors ◽  
Order Of Magnitude ◽  
Good Agreement

This work is focusing on the effect of a high concentration of nitrogen (N) introduced by ion implantation at the SiO2/4H-SiC interface in MOS capacitors. The N implanted sample (Ninterface ~1x1019cm-3) is compared with a non-implanted one (Ninterface ~1x1016cm-3) by means of the electron interface trap density (Dit). The Dit is determined via High-Low frequency C-V method and Thermal Dielectric Relaxation Current (TDRC) technique. It is shown that the TDRC method, mainly used so far for determination of near interface oxide charges, can be exploited to gain information about the Dit too. The determined value of Dit in the N-implanted sample is nearly one order of magnitude lower than that in the sample without N implantation. Good agreement between the TDRC results and those obtained from High-Low frequency C-V measurements is obtained. Furthermore, the TDRC method shows a high accuracy and resolution of Dit evaluation in the region close to the majority carrier band edge and gives information about the traps located into the oxide.

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