In order to find a way to induce rooting on cuttings of Hemarthria compressa cv. Ya’an under controlled conditions, a project was carried out to study the effect of naphthalene acetic acid (NAA) on rooting in stem cuttings and related physiological changes during the rooting process of Hemarthria compressa. The cuttings were treated with five concentrations of NAA (0, 100, 200 300, 400 mg/l) at three soaking durations (10, 20, 30 minutes), and cuttings without treatment were considered as control. Samples were planted immediately into pots after treatment. IAA-oxidase (IAAO) activity, peroxidase (POD) activity and polyphenol oxidase (PPO) activity were determined after planting. Results showed that NAA had positive effect on rooting at the concentration of 200 mg/l compared to other concentrations at 30 days after planting (DAP). Among the three soaking durations, 20 minutes (min) of 200 mg/l NAA resulted in higher percentages of rooting, larger numbers of adventitious roots and heavier root dry weight per cutting. The lowest IAAO activity was obtained when soaked at 200 mg/l NAA for 20 min soaking duration. This was consistent with the best rooting ability, indicating that the lower IAAO activity, the higher POD activity and PPO activity could be used as an indicator of better rooting ability for whip grass cuttings and might serve as a good marker for rooting ability in cuttings.
A new transition‐metal‐free 9‐azabicyclo[3.3.1]nonan‐N‐oxyl (ABNO) catalyzed aerobic oxidative synthesis of 2‐substituted 4H‐3,1‐benzoxazines and quinazolines has been developed through cascade reaction of aldehydes with 2‐aminobenzyl alcohols and 2‐aminobenzylamines, respectively. Under the optimal reaction conditions, the two kinds of heterocycles were obtained in 72–97 % isolated yield.
An efficient method for the synthesis of 3-tertiary alkylated 1,1-difluorostyrene derivatives via Cu-catalyzed alkylation of α-(trifluoromethyl)styrenes with tertiary alkylmagnesium reagents at room temperature was developed.
A series of experiments were performed for toluene decomposition from a gaseous influent at normal temperature and atmospheric pressure by nonthermal plasma coupled with a combination of catalysts technology. Nonthermal plasma was generated by dielectric barrier discharge. γ-Al 2 O 3 was used to be a sorbent and a catalyst carrier. Nanocatalysts were MnO 2 /γ-Al 2 O 3 coupled with modified ferroelectric of nano-Ba 0.8 Sr 0.2 Zr 0.1 Ti 0.9 O 3 . γ-Al 2 O 3 played an important role in prolonging reaction time of nonthermal plasma with volatile organic compounds molecules. MnO 2 /γ-Al 2 O 3 has an advantage for ozone removal, while nano-Ba 0.8 Sr 0.2 Zr 0.1 Ti 0.9 O 3 is a kind of good ferroelectric material for improving energy efficiency. Thus these packed materials were incorporated together to strengthen nonthermal plasma power for volatile organic compounds decomposition. The results showed the synergistic technology resulted in greater enhancement of toluene removal and energy efficiencies and a better inhibition for ozone formation in the gas exhaust. Based on the data analysis of the Fourier transforms infrared spectrum, the reaction process of toluene decomposition and the mechanism of synergistic effect are discussed. The results showed in a complex oxidation mechanism of toluene via several pathways, producing either ringretaining or ringopening products. The final products were carbon dioxide and water.
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