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.00125pHT – 0.01857pH 2 – 0.000032T 2 ( F = 90.4048**)]. Three-dimensional response surface plot showing the effect that when pH = 5.4461, T = 8.916 h, the solubility reached a maximum value of 0.0564 ± 0.0032 mg. At the same time, the pH value of

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a 5-μm particle size (Merck, Darmstadt, Germany). The mobile phase was 2% KH 2 PO 4 adjusted to pH 2.3 with H 3 PO 4 . Results were expressed as mg AA/100 mL of juice. Flavanone glycosides. HES, NAT, and DID (mg/100 mL) were determined by

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) at pH 2.4 ± 0.01 was used for vitamin C analysis. Two milliliters of juice were mixed with 2 mL of 2.4% (w/v) metaphosphoric acid and centrifuged at 6900 g n for 5 min at 5 °C. An aliquot of the centrifuged sample (0.5 mL) was then transferred to a

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inheritance of flower color was attributed to the combined effect of anthocyanin pigmentation and pH, the latter being controlled by two independent codominant genes, Ph1 and Ph2 ( Griesbach, 1996 ). In morning glory, flower color varied from reddish

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(pH 2.2) and the flow rate was 1 mL·min −1 . Statistical analysis. Statistically significant differences ( P ≤ 0.05) were determined for the microbial counts, gas concentration, and visual and physicochemical evaluation data based on an analysis of

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-18e resin). Elution was performed in a stepwise gradient with a water (pH 2.6 adjusted with H 3 PO 4 )/acetonitrile (ACN) volumetric ratio of 0 min, 7% ACN; 0 to 20 min, 20% ACN; 20 to 28 min, 23% ACN; 28 to 40 min, 27%, ACN; 40 to 45 min, 29%, ACN

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dihydrogen phosphate and 4.0 m m triethylamine adjusted to pH 2.75 with 85% orthophosphoric acid. The flow rate was 1.0 mL·min –1 and the total chromatographic run time was 14 min. The sample injection volume was 50 μL. To improve the detector sensitivity

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evaporator and the aqueous phase was adjusted to pH 2.8 with 1% hydrochloric acid (Merck) and extracted three times with ethyl acetate (Merck). It was evaporated to dryness, dissolved in 1 mL of HPLC methanol, and used for of ABA and GA 3 quantification at

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rootstock growth through increasing soil pH; 2) biochar can improve apple rootstock growth through increasing soil microbial biomass and hence increase nutrient mineralization and availability; and 3) biochar can increase apple rootstock growth in

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, plants of this species were grown in PIP and AGP and irrigated with fresh and saline water. The following points were studied: 1) substrate temperature and leachate EC and pH; 2) growth and development of the plant and any salt damage; and 3) pore water

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