Seedless, Surfactantless, High-Yield Synthesis of Branched Gold Nanocrystals in HEPES Buffer Solution

2007 ◽  
Vol 19 (11) ◽  
pp. 2823-2830 ◽  
Author(s):  
Jianping Xie ◽  
Jim Yang Lee ◽  
Daniel I. C. Wang
Keyword(s):  
High Yield ◽  
Buffer Solution ◽  
Gold Nanocrystals ◽  
Hepes Buffer ◽  
Hepes Buffer Solution

A selective fluorescent probe for the detection of Cd2+ in different buffer solutions and water

2016 ◽  
Vol 45 (30) ◽  
pp. 12087-12093 ◽  
Author(s):  
Zheng Xu ◽  
Guoqiang Li ◽  
Yuan-Yuan Ren ◽  
Hua Huang ◽  
Xiaoping Wen ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Buffer Solution ◽  
Hepes Buffer ◽  
Buffer Solutions ◽  
Hepes Buffer Solution ◽  
Excellent Selectivity

A fluorescent probe NHQ, which exhibited excellent selectivity toward Cd2+ in different buffer solutions such as Tris-HCl buffer solution, HEPES buffer solution, and PBS buffer solution, and even in water, was developed.

Ratiometric sensing of Zn2+ with a new benzothiazole-based fluorescent sensor and living cell imaging

The Analyst ◽  
2021 ◽  
Author(s):  
Qi Wu ◽  
Liheng Feng ◽  
Jianbin Chao ◽  
Yu Wang ◽  
Shaomin Shuang
Keyword(s):  
Fluorescent Probe ◽  
Living Cell ◽  
Cell Imaging ◽  
Fluorescent Sensor ◽  
Buffer Solution ◽  
Hepes Buffer ◽  
Ratiometric Sensing ◽  
Hepes Buffer Solution ◽  
Living Cell Imaging

A new fluorescent probe, 3-(Benzo[d]thiazol-2-yl)-5-bromosalicylaldehyde-4N-phenyl thiosemicarbazone (BTT) for ratiometric sensing of Zn2+ ions in methanol / HEPES buffer solution (3 : 2, pH = 7.4) is reported in this paper....

An Aptamer-Modified Nanogold Method for the Determination of Trace Ag+ Using Resonance Rayleigh Scattering as Detection Technique

2013 ◽  
Vol 647 ◽  
pp. 618-622
Author(s):  
Zhi Liang Jiang ◽  
Chen Yin Lin ◽  
Ai Hui Liang
Keyword(s):  
Gold Nanoparticle ◽  
Rayleigh Scattering ◽  
High Sensitivity ◽  
Resonance Rayleigh Scattering ◽  
Buffer Solution ◽  
Hepes Buffer ◽  
Large Particles ◽  
Ethanesulfonic Acid ◽  
Hepes Buffer Solution

Aptamer was modified the gold nanoparticle (AuNP) to form stable aptamer-AuNP probe that was not gathered in the pH 7.2 2-[4-(2-hydroxyethyl)-1-piperazinyl]ethanesulfonic acid (HEPES) buffer solution and in the presence of NaCl. The Ag+ react with the aptamer-AuNP probe to fold a hairpin structure complex of Ag+-aptamer and release AuNPs that were aggregated to large particles, which lead to resonance Rayleigh scattering (RRS) peak at 596 nm enhancement. The enhanced value ΔI596nm is linear to Ag + concentration in the range of 6.7×10-8-1.33×10-6 mol/L. Thus, a new RRS methods were proposed for detection of Ag+, with high sensitivity, good selectivity and simplicity.

Hydrothermal synthesis of transition metal oxide nanomaterials in HEPES buffer solution

2010 ◽  
Vol 64 (18) ◽  
pp. 1939-1942 ◽  
Author(s):  
Hui Li ◽  
Zhong Lu ◽  
Jiliang Wu ◽  
Hui Yu ◽  
Xianglin Yu ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Transition Metal ◽  
Metal Oxide ◽  
Transition Metal Oxide ◽  
Buffer Solution ◽  
Hepes Buffer ◽  
Metal Oxide Nanomaterials ◽  
Hepes Buffer Solution

scholarly journals High-yield Synthesis of Branched Gold Nanocrystals by a Sodium Diphenylamine-4-Sulfonate Reduction Process in Polyethylene Glycol Aqueous Solution

2010 ◽  
Vol 28 (4) ◽  
pp. 537-542 ◽  
Author(s):  
Qi Liu ◽  
Lifang Lai ◽  
Hexiang Huang ◽  
Jianhua Sun ◽  
Tongming Shang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Polyethylene Glycol ◽  
Reduction Process ◽  
High Yield ◽  
Gold Nanocrystals

Resistance artery vasodilation to magnesium sulfate during pregnancy and the postpartum state

2005 ◽  
Vol 288 (4) ◽  
pp. H1521-H1525 ◽  
Author(s):  
Anna G. Euser ◽  
Marilyn J. Cipolla
Keyword(s):  
Magnesium Sulfate ◽  
Systemic Blood Pressure ◽  
Mesenteric Arteries ◽  
Sprague Dawley ◽  
Resistance Arteries ◽  
Buffer Solution ◽  
Sprague Dawley Rats ◽  
Small Resistance ◽  
Vascular Beds ◽  
Hepes Buffer Solution

This study compared the vasodilatory responses to magnesium sulfate (MgSO4) of cerebral and mesenteric resistance arteries and determined whether the responses varied between different gestational groups. Third-order branches (<200 μm) of the posterior cerebral (PCA) and mesenteric arteries (MA) were dissected from nonpregnant (NP; n = 6), late pregnant (LP; day 19, n = 6), and postpartum (PP; day 3, n = 6) Sprague-Dawley rats. A concentration-response curve was performed by replacing the low-MgSO4 (1.2 mM) HEPES buffer solution with increasing concentrations of MgSO4 (4, 6, 8, 16, and 32 mM) and measuring lumen diameter at each concentration. All groups exhibited concentration-dependent dilation to MgSO4, decreasing the amount of tone in the vessels. However, MA were significantly more sensitive to MgSO4 than PCA. Whereas there was no difference in the response between different gestational groups in MA, the PCA from the LP and PP groups showed a significantly diminished response to MgSO4. The percent dilation at 32 mM MgSO4 for PCA versus MA in NP, LP, and PP animals was 36 ± 2 vs. 51 ± 7% ( P < 0.05), 19 ± 9 vs. 54 ± 6% ( P < 0.01 vs. PCA and NP), and 12 ± 5 vs. 52 ± 11% ( P < 0.01 vs. PCA and NP). These results demonstrate that MgSO4 is a vasodilator of small resistance arteries in the cerebral and mesenteric vascular beds. The refractory responses of the PCA in LP and PP groups demonstrate changes in the cerebrovascular vasodilatory mechanisms with gestation. The greater sensitivity of the MA to MgSO4-induced vasodilation suggests that the prophylactic effect of MgSO4 on eclamptic seizures may be more closely related to the lowering of systemic blood pressure than to an effect on cerebral blood flow.

scholarly journals A MODIFIED METHOD FOR STUDYING THE GLYCOXIDATION REACTION

2020 ◽  
Vol 74 (2) ◽  
pp. 61-66
Author(s):  
R.A. Litvinov ◽  
◽  
V.A. Kosolapov ◽  
E.A. Muravyova ◽  
I.V. Skachko ◽  
...  
Keyword(s):  
Bovine Serum Albumin ◽  
Reaction Medium ◽  
Deionized Water ◽  
Buffer Solution ◽  
Experimental Conditions ◽  
Modified Method ◽  
Oxidative Reactions ◽  
Oxidative Processes ◽  
Analytical Range ◽  
Hepes Buffer Solution

The article considers a particular model of the glycation reaction, called glycoxidation and characterized by a significant involvement of oxidative reactions and the participation of transition metals. The enhancement of oxidative processes, which makes it possible to identify the reaction as glyoxidation, was realized by introducing copper (II) cations (CuSO 4 * 5H 2 O) into the reaction medium in a form accessible for interaction with the reaction participants. The main reagents in the glycoxidation reaction, in addition to CuSO 4 *5H 2 O are bovine serum albumin (1 g/l), glucose (0,5 M), HEPES buffer solution (24 g/l) dissolved in deionized water. The conditions have been selected under which the glycoxidation reaction linearly depends on the concentration of copper (II), which makes the cation activity a sensitive target when monitoring the reaction. The dependence of the reaction on the concentration of CuSO 4 * 5H 2 O under the presented experimental conditions has been confirmed experimentally and mathematically. An analytical range of concentrations of CuSO 4 *5H 2 O has been established, in which a linear dependence of AGE formation on concentration is observed. For the concentration of CuSO 4 *5H 2 O, which produces the greatest potentiating effect on the AGE formation (10 mg/l), the procedure was validated by the indices of internal laboratory reproducibility and convergence. The technique is of interest for investigation of the antiglycoxidative activity of novel compounds.

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