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The dispersion stability and wettability of suspension concentrates are beneficial for improvement of the utilization rate of pesticides. Herein, four kinds of novel organosilane-modified polycarboxylate dispersants P(AA3-APEG1-Six) with different silicone contents ranging from 0 to 0.5 mol were successfully synthesized using acrylic acid (AA), allyl polyethoxyether (APEG-1000) and organosilicon modifier 3-(trimethoxysilyl)propylmethacrylate (MAPTMS) as monomers, and their surface properties were systematically investigated. Meanwhile, 25% tebuconazole (TEB) suspension concentrate (SC) was milled with the four P(AA3-APEG1-Six (SCP(AA3-APEG1-Six)), and the influences of P(AA3-APEG1-Six) on the zeta potential, particle size, suspension rate and rheological behaviors of the 25% TEB SC were also studied. The results showed that P(AA3-APEG1-Si0.5) had the lowest surface tension by maintaining an AA:APEG-1000 mole ratio of 3 : 1, and changing the MAPTMS additive amount from 0 to 0.5 mol. Additionally, the obtained TEB SCP(AA3-APEG1-Six) system exhibits shear thinning behavior under high shearing rate, showing typical features of a pseudo-plastic non-Newtonian fluid, which conforms to the Power-law model. More importantly, the SCP(AA3-APEG1-Six), especially for P(AA3-APEG1-Si0.5), exhibited relatively minimum change in particle size and zeta potential compared to that of the unmodified polymers, and displayed superior suspension rate. Significantly, TEB SCP(AA3-APEG1-Six) showed excellent wetting and spreading behavior on plant leaves, which contributes to obviously improving pesticide utilization. [ABSTRACT FROM AUTHOR]

Here, we report a simple but effective nose/tongue-mimic sensor array based on HAuCl4/3,3′,5,5′-tetramethylbenzidine (TMB) for colorimetric discrimination and determination of antioxidants. Two concentrations of HAuCl4 were employed as receptor units to construct the colorimetric sensor array. The sensing strategy is based on the fact that HAuCl4 with different concentrations (0.08 and 0.03 mM) could oxidize TMB to oxidized TMB (oxTMB), resulting in a blue and green color solution, respectively, corresponding to an absorption peak centered at 440 nm and 657 nm. However, the presence of different antioxidants could cause the reduction in HAuCl4, leading to the fading of the blue and green color and the decrease in the absorbance at 440 nm and 657 nm to varying degrees. Based on the above phenomena, by taking advantage of linear discriminant analysis (LDA), five antioxidants (i.e. ascorbic acid (AA), melatonin (MT), uric acid (UA), tannic acid (TCA), and glycine (Gly)) at five concentrations (200, 120, 60, 20, and 1 nM) were successfully discriminated both in buffer and serum. More importantly, this approach is simple, fast, and without the use of any nanomaterials. [ABSTRACT FROM AUTHOR]

An ice-phobic gummed tape (IPGT) is fabricated by designing nano-cones (NCs) on poly(vinylidene fluoride) microspheres on a flexible thin film. The IPGT with NCs exhibits excellent ice-phobic and de-ice properties that are attributed to effective cooperation between the micro- and nanostructure compared to other materials. This investigation is significant for materials that can be extended into practical applications. [ABSTRACT FROM AUTHOR]

Here, we report a simple but effective nose/tongue-mimic sensor array based on HAuCl 4 /3,3',5,5'-tetramethylbenzidine (TMB) for colorimetric discrimination and determination of antioxidants. Two concentrations of HAuCl 4 were employed as receptor units to construct the colorimetric sensor array. The sensing strategy is based on the fact that HAuCl 4 with different concentrations (0.08 and 0.03 mM) could oxidize TMB to oxidized TMB (oxTMB), resulting in a blue and green color solution, respectively, corresponding to an absorption peak centered at 440 nm and 657 nm. However, the presence of different antioxidants could cause the reduction in HAuCl 4 , leading to the fading of the blue and green color and the decrease in the absorbance at 440 nm and 657 nm to varying degrees. Based on the above phenomena, by taking advantage of linear discriminant analysis (LDA), five antioxidants (i.e. ascorbic acid (AA), melatonin (MT), uric acid (UA), tannic acid (TCA), and glycine (Gly)) at five concentrations (200, 120, 60, 20, and 1 nM) were successfully discriminated both in buffer and serum. More importantly, this approach is simple, fast, and without the use of any nanomaterials.