preparation characterization and application as chemical sensors

... broad band centered at 3417 cm−1assigned to OeH and NeH stretching vibrations and bands at 2920 cm-1, 1664 cm-1, and 1600 cm−1due to C–H stretching, amide I and NeH bending from amine and amide ... the –SePh (3c) and –SPh (3d) groups presented additional bands at 1542 cm-1associated with the C]C stretching of aromatic rings and bands at 536 cm-1and 648 cm-1assigned to Se-C and SeC bonds ... exhibited the bands proceeding from CS with some discrepancies As noticed, the bands assigned to OeH and NeH stretching vibrations (3600-3100 cm -1) are sharpened while bands assigned to NeH

Ngày tải lên: 07/01/2023, 21:23

... products can be classified on different bases as detailed below: Classification based on source Hydrogels can be classified into two groups based on their nat-ural or synthetic origins[7] Classification ... over structure such as cross-linking density and with tailored properties, such as biodegradation, mechanical strength, and chemical and biological response to stimuli[6] Classification of hydrogel ... life, and wide varieties of raw chemical resources Literature on this subject was found to be expanding, especially in the scientific areas of research However, a number of publications and technical

Ngày tải lên: 13/01/2020, 06:23

... viscosity (mPas): 10 - 100; Epoxy resin and Hardener were purchased from G C Chem Co Kunshan, China Ethanol, acetone (AR) and others reagent for preparation of artificial seawater (ASW) were purchased ... structure steel (used as plain rebars in some cases) was purchased from Angang Iron and Steel Group, Xinyang Iron & Steel Co., Ltd, China Chemical composition of Q235 steel in wt.% as C: 0.17, Si: ... Nowadays, steel has become an important part of our life due to its extensively applications in automotive, household appliances, business machine and heavy construction such as marine and chemical industries

Ngày tải lên: 13/01/2020, 08:35

... significant as the weight of NFAD increased (II) and Cu (II) adsorbed increased as the dose of NFAD increased which could possibly be due to increased surface neg-ative charge and decrease in the ... residue was filtered, washed, and dried in an oven until constant weight was obtained The dried mass was then treated with alkali (17.5% NaOH, m/v) for 2 h to remove hemicelluloses; this was filtered, ... discarded as waste The seed is underutilized and chemical evaluation of the seed has shown it to be rich in some essential amino Trang 3acids [20,21] It is non-toxic, cheap, readily available, andTherefore,

Ngày tải lên: 14/01/2020, 03:01

... CeO2 in CSNs qualitatively and EDAX analysis along the cursor crossing showed that Ce was located at the end and Si was first It could be said CeO2 was the shell and SiO2 was the core (Figure 5) ... (NaOH), and CTAB were purchased from Sigma Chemicals (USA) Nitrate monohydrate Hg (NO3)2 was from Merck and all the chemicals were of analytical grade A stock solution (1000 mg L−1) of Hg(II) was ... concentrations, it was observed that adsorption was increased by increasing the initial concentration initially (Figure 10), and was then held constant as the adsorption probability is higher at higher

Ngày tải lên: 13/01/2022, 00:05

... Article Imidazole-based Potential Bi- and Tridentate Nitrogen Ligands: Synthesis, Characterization and Application in Asymmetric Catalysis Roman Sívek, Filip Bureš *, Oldřich Pytela and Jiří Kulhánek ... acid-base character and OPEN ACCESS Trang 2possible tautomerism, and last but not least, for their easy synthesis and possible manifold functionalization Imidazole is frequently found as part ... yields and enantiomeric excesses (ee) achieved for ligands 3a-f and 4a-f as well as for the precedent ligands 1a-f [24] and 2a-c, 2e [17] are summarized in Table 3 When comparing the attained chemical

Ngày tải lên: 04/12/2022, 14:48

... aqueous and hydrocarbon phases Un-inoculated broth was used as blank The absorbance of the aqueous phase was measured with a spectrophotometer at 400 nm (Patil and Chopade 2001) Tilting glass slide ... main genera, namely: Pseudomonas, Bacillus, Sphingomonas, Klebsiella and Actinobacteria in soils and sediments, and Pseudoalte-romonas, Halomonas, Alcanivorax, and Acinetobacter in marine ecosystems ... spreading, and tilted glass slide The bacterial isolate was identified based on phenotypic, biochemical, and molecular means Thin-layer chromatography (TLC) and gas chromatography mass spectrometry

Ngày tải lên: 04/12/2022, 15:15

... for production and gelling ions 2 Materials and methods 2.1 Polysaccharides Alginates, UP-LVG and LF200S were obtained from Novamatrix (Sandvika, Norway) and FMC Biopolymer AS (Sandvika, Norway), ... confocal laser scanning microscopy (CLSM), as previously described (Strand et al., 2003) CNF (TUNICELL ETC) derived from C intestinalis was obtained from Ocean TuniCell AS (Bergen, Norway), based ... which E is Young's modulus (Pa), L and A are the length (m) and area (m2) of cylinders, and W0 and W1, respectively, are the masses (g) of each sample prior to and following gelation 2.6 Rheology

Ngày tải lên: 01/01/2023, 13:22

... waste and toxic gas at the bottom of the pond, stable pH and color of pond water, inhibition of the growth of microorganisms that cause disease in fish and shrimp such as Vibrio sp and increase ... catus (Plumb and Sanchez, 1983) and walking catfish Clarias batrachus (Kasornchandra et al., 1987) According to Francis-Floyd et al (1987), the disease occurs seasonally during spring and fall ... advisor: Associate Professor Nontawith Areechon, Ph.D and my committee members: Assistant Professor Sasimanas Unajak, Ph.D and Assistant Professor Ruangvit Yoonpundh, Ph.D., for their suggestion and

Ngày tải lên: 11/07/2021, 16:37

... economic and environmental points of view The reaction of benzil and benzene-1,2-diamine was run as a model reaction using catalysts III and IV When the reaction was finished, Trang 8the mixture was ... acid (3 mmol, 0.2 mL) was added dropwise over 5 min at room temperature The reaction mixture was stirred for 2 h, and CH2Cl2 was decanted The residue was washed with CH2Cl2 and an adequate amount ... molar hydrochloric acid was slowly dropped into the flask at room temperature and stirred for 12 h Finally, the formed solid was washed with ether, acetone, and water and dried in a vacuum oven

Ngày tải lên: 13/01/2022, 00:02

... account in case preparation of our volume So, this volume is a complete guide to the subject of kinetic and mechanisms of chemical reactions in gas, liquid and solid states The editors and contributors ... Waste Utilization Based on the Cals-Concept 155  A M Bessarabov, A V Kvasyuk and G E Zaikov  Chapter 12 Practical Hints on the Application of Nanosilvers in Antibacterial S Dadvar, A Oroume and ... only positive emotions to readers and we are waiting for the opinions of readers in this case So, we should stop about proverbs and start about chemical science and application This volume includes

Ngày tải lên: 28/03/2014, 10:20

... wt.%) and that Cu was released from the particles in a pH-dependent manner Metal release was a function of both pH and the presence of competing ligands The toxicity of the particles was measured ... diabetes, Alzheimer’s disease, and Parkinson’s disease [27] Cancer cells use ROS to suppress apoptosis, accel-erate proliferation, induce metastasis and angiogenesis, and promote genetic instability ... further investigate Cu release as a function of competing ligand Cu release experiments conducted in 100 mM citrate buffer at pH 4, 5, and 6 revealed faster metal release at pH 6 than at pH 4 (see

Ngày tải lên: 21/06/2014, 02:20

... buffer (wash 1), IP buffer plus salt (wash 2, as wash 1 but with 500 mM NaCl), wash buffer (wash 3, 10 mM Tris pH 8, 250 mM LiCl, 1 mM EDTA, 0.5% nonidet P-40 and 0.5% Na deoxycholate) and TE pH ... following heat-shock (and concomitant oxidative stress), to provide heme, for example, for cytochrome biosynthesis and for catalase and superoxide dismutase production and this could be achieved ... X-100, plus Protease Inhibitor Cocktail) was added and the chromatin was sheared by sonication (Sonics VibraCell VCX130, CH-1217 Meyrin/Satigny, Switzerland) on ice One 2 ml aliquot was sonicated

Ngày tải lên: 14/08/2014, 21:20

... (99.5%) and ethyl alcohol were purchased as reagent-grade from Duksan Pure Chemical Co (Ansan-si, Gyeonggi-do, South Korea) and Daejung Chemical Co (Gwangju-si, Gyeonggi-do, South Korea) and were ... WO3, and TiO2 Because of the least band gap of fullerene (1.6 to 1.9 eV), hole and electron pairs were generated and separated on the interface of fullerene easily by visible light irradiation, and ... both the conduction band (CB) and the valence band (VB) of WO3 were higher than the CB and VB of TiO2 and fullerene When the hole and electron pairs were also generated and separated on the interface...

Ngày tải lên: 21/06/2014, 01:20

... Squibb (Brazil) and was initially prepared as a g/L stock solution in DMSO/methanol 1:1 Candida albicans ATCC 90028 was purchased from American Type Culture Collection (ATCC) and reactivated ... AmB and/ or CMC concentration are mM, 0.005 mM and mg.mL-1, respectively Alternatively, PDDA was replaced by PL (Table 2) At high P, the effect of increasing PL molecular weight was an increase ... charge on the assembly was not sufficient to substantially reduce fungus viability For final coverage with polylysines (PL) of increasing molecular weight at mg/mL PL, there was an increase in the...

Ngày tải lên: 11/08/2014, 00:22

... categorized into gas (vapor) phase fabrication and liquid phase fabrication Gas phase fabrication, such as pyrolysis or inert gas condensation, involves evaporation, supersaturation, gas-solid surface ... thickness Line (1) denotes the stable case, line (2) the unstable case and line (3) the metastable case.21 In contrast to polymer which dewets only above its glass transition temperature, metal can ... Sketch of effective interface potential as a function of film thickness Line (1) denotes the stable case, line (2) the unstable case and line (3) the metastable case.21……………………….…………………………… Figure...

Ngày tải lên: 09/09/2015, 11:26

... potentially useful as encapsulates for drugs, enzymes, protein, genes and catalysts, as transducers and dielectrics for electronics, as absorbent materials for sound and microwave, as contrast agents ... microspheres, and (e) and (f) Ag@air@P(MAA-co-DVB)-click-PNIPAM hybrid microrattles Figure 5.22 XPS wide-scan and C 1s core-level spectra of the (a and b) Au@SiO2@P(MAA-co-DVB), and (c and d) Au@SiO2@P(MAA-co-DVB)-click-PEG ... micro- and nanospheres with novel morphology and functions via a combination of inorganic and polymer synthesis and optimize the applications of these hollow polymer structures in drug delivery and...

Ngày tải lên: 10/09/2015, 08:40

... help in the work and it was a pleasure to work with them Special thanks to Prof Sow Chong Haur and his lab members for helping with the Raman and conductivity measurements Technical assistance from ... Mechanical Characterization 116 4.2.6 Electrical Characterization 117 4.3 Results and Discussion 117 v 4.3.1 Characterization of Graphene and Graphene/PVC Thin 117 Films 4.3.2 Mechanical Characterization ... methods of preparation, characterization techniques, properties, functionalization techniques and applications have been explained in Chapter Chapter deals with the isolation and characterization...

Ngày tải lên: 10/09/2015, 15:48

... for applications in electrocatalysis, as electrochemical sensors, electronic and photovoltaic devices In the following sections, the fabrication strategies, characterizations and potential applications ... electrochemical polymerization, chemical polymerization, and chemical vapor deposition The electrochemical and chemical polymerization methods will be introduced in this chapter while the chemical ... [122], poly-MTAPcs have been studied as sensors and electrocatalysts Sun and Tachikawa investigated the use of poly-CoTAPc and poly-CuTAPc films as biochemical sensors for the amperometric detection...

Ngày tải lên: 14/09/2015, 14:08

... (Fc/Fc+) redox couple, which was used as an internal standard The supporting electrolyte was 0.1 M Bu4NPF6 and analytical grade CH2Cl2, was used as the solvent and distilled over calcium hydride ... solvent was distilled out Water was added and extracted by CH2Cl2 The organic layer was washed by Na2CO3, Na2S2O3 and NaCl solution After 29 the solvent was distilled out, the crude was purified ... The mixture was stirred for h at room temperature and refluxed for another h The solvent was then distilled and the residue was neutralized with Na2CO3 After washing with water and brine, the...

Ngày tải lên: 14/09/2015, 14:09