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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

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

) 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

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

(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

-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

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

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

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

, 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