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Matrix enhancement effects
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This study aimed to investigate the ability of analyte protectants to enhance GC-MS signals and compensate matrix effects for a range of micropollutants in pure standard, effluent, and influent wastewater samples during analysis and detection.
7p
vironald
15-12-2022
6
2
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Quantitation was performed with multiple reaction monitoring in the negative ionization mode. The response of the method was linear over a dynamic range of 0.5–500, 1.0–750, and 0.25–150 ng/mL for LOS, EXP-3174, and HCTZ, respectively. Extent of signal suppression/enhancement was examined through postcolumn infusion. The effect of matrix components was evaluated by postextraction spiking and calculation of the slope of calibration lines. The method was successfully applied to a bioequivalence study of 50 mg losartan and 12.
20p
langthannam
29-12-2021
9
1
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Moderate loads with knee loading enhance bone formation, but its effects on the maintenance of the knee are not well understood. In this study, we examined the effects of knee loading on the activity of matrix metalloproteinase13 (MMP13) and evaluated the role of p38 MAPK and Rac1 GTPase in the regulation of MMP13.
11p
vianrose2711
26-04-2021
9
2
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Recent studies have suggested that eosinophils may have a direct effect on airway smooth muscle cells (ASMC), causing their proliferation in patients with asthma, but the precise mechanism of the interaction between these cells remains unknown.
11p
vimaine2711
26-03-2021
8
2
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N-cadherin is a trans-membrane adhesion molecule associated with advanced carcinoma progression and poor prognosis. The effect of N-cadherin on matrix metalloproteinase 9 (MMP-9) regulation is implicated in human nasopharyngeal carcinoma (NPC) cell invasion.
14p
vimale2711
25-08-2020
9
1
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Currently available anti-ulcer drugs suffer from serious side effects which limited their uses and prompted the need to search for a safe and efficient new anti-ulcer agent. Boswellia gum resin (BR) emerged as a safe, efficient, natural, and economic potential cytoprotective agent. Thus, it is of medical importance to develop gastroretentive (GR) formulations of BR to enhance its bioavailability and antiulcer efficacy. Early attempts involved the use of organic solvents and non-applicability to large-scale production.
11p
caothientrangnguyen
09-05-2020
12
0
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A simple microextraction method based on solidification of a floating organic drop (SFOD) was developed for preconcentration of lead prior to its determination by electrothermal atomic absorption spectrometry (ETAAS). Ammonium pyrolidinedithiocarbamate (APDC) was used as complexing agent, and the formed complex was extracted into a 20 lL of 1-undecanol. The extracted complex was diluted with ethanol and injected into a graphite furnace.
6p
kethamoi1
17-11-2019
23
0
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This work pointed out the preparation of a magnetic glass–ceramic in the system Fe2O3–ZnO–CaO–SiO2. The base composition was designed to crystallize about 60% magnetite. The influence of adding TiO2, Na2O and P2O5 separately or as mixtures was studied. The DTA of the glasses revealed a decrease in the thermal effects by adding P2O5, TiO2 and Na2O in an increasing order. The X-ray diffraction patterns showed the presence of nanometric magnetite crystals in a glassy matrix after cooling from the melting temperature.
9p
kethamoi1
17-11-2019
23
0
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Kresoxim-methyl and its two thermolabile metabolites, BF 490-2 and BF 490-9, were analyzed in pear using a pepper leaf matrix protection to maintain the metabolites inside the gas chromatography system. Samples were extracted with a mixture of ethyl acetate and n-hexane (1:1, v/v) and purified and/or separated using a solid phase extraction procedure. The pepper leaf matrix was added and optimized with cleaned pear extract to enhance metabolite sensitivity. Matrix matched calibration was used for kresoxim-methyl in the pear matrix and for metabolites in the pear mixed with pepper leaf matrix.
7p
kethamoi1
17-11-2019
21
1
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The present investigation focused on the development of Diltiazem HCl (DTH) matrix film and its characterization by in-vitro, ex-vivo and in-vivo methods. Films were prepared by solvent casting method by taking different ratios of hydroxypropyl methylcellulose K4M (HPMC K4M) and Eudragit RS100.
12p
kequaidan1
16-11-2019
22
0
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Polylactide (PLA)-hydroxyapatite (HAp) composite components have attracted extensive attentions for a variety of biomedical applications. This study seeks to explore how the biocompatible PLA matrix and the bioactive HAp fillers respond to thermo-mechanical environment of a PLA-HAp composite manufactured by 3D printing using Fused Filament Fabrication (FFF). The insight is obtained by in situ synchrotron small- and wide- angle X-ray scattering (SAXS/WAXS) techniques.
10p
trinhthamhodang1
14-11-2019
24
1
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Exposure to cold causes cutaneous vasoconstriction to reduce body heat loss, while the airway warms up the inspired cold air, thus suggesting that cooling might evoke a response in tracheal smooth muscle different from that in cutaneous blood vessels. The aim of this study was to evaluate the effect of temperature on isolated rat trachea, with or without electric field stimulation (EFS).
5p
vihasaki2711
12-11-2019
17
0
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The study area is located on an ecosystem that is of low carrying capacity and as such this has necessitated excessive use of agro-chemicals to enhance productivity. The effects from these practices is that the chemicals find their way into the lake through runoff from the agricultural parcels of land. Because the land generally slopes towards the lake. Poor tillage practices often result in soil erosion and the loose soil is carried awash into the lake. All these result in increased eutrophication of the lake’s waters.
28p
tainhacmienphi
19-02-2013
49
7
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To enhance learning (RL) is a branch en ot the foundation cial intelligence and has been one of the central themes in a wide range of scientifi c fi elds final two decades. Understanding of the RL is expected to provide a systematic understanding the adaptive behaviors, including simple things of classical and operant animal as well as all acts of social and economic complexity of the human is designed to ts maximize the effect, and also very helpful in learning computer and robot. RL aims to fi nd mapping from situations to appropriate actions, in which a reward is maxi- mized....
640p
samsungwifi
03-04-2012
117
36
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