Identification of hydrolysable tannins in the reaction zone of Eucalyptus nitens wood by high performance liquid chromatography–electrospray ionisation mass spectrometry

Benzothiadiazole Induces the Accumulation of Phenolics and Improves Resistance to Powdery Mildew in Strawberries

“…The composition of ETs was determined by analyzing the fragmentation patterns where a loss of 170 or 152 (-H 2 O) mass units corresponds to galloyl, 302 to HHDP, and 180 or 162 (-H 2 O) to glucosyl units. With few exceptions, all tannins were found as doubly charged molecular ions, which is typical for electrospray ionization of tannins (28). For an unknown reason, isotope patterns did not strictly follow the 0.5 mass unit interval characteristic for doubly charged ions but, since further fragmentation (MS 2 and MS 3 ) resulted in larger ions than were found in full MS, and isotope differences were below 1.0, those molecular ions were considered as [M -2H] 2-.…”

“…Ellagitannins are known to inhibit herbivores and act as antimicrobial barriers in woody plants (3,28), but no information is available about their influence on phytopathogens and, particularly, on biotrophs such as powdery mildews in nonwoody plants. The high total content of ETs and the subsequent induction after BTH treatment, leading to enhanced resistance, implies that ETs may be important for the resistance to powdery mildew in strawberries, the basis of which is yet mostly unknown.…”

Protective effect ofTerminalia muelleriagainst carbon tetrachloride-induced hepato and nephro-toxicity in mice and characterization of its bioactive constituents

“…The loss of 152 Da and 170 Da indicated the presence of galloyl groups. The fragment ion at m/z 301 indicated the presence of HHDP groups (Barry et al, 2001). Compound 1 was identified as chebulic acid based on its molecular ions [M-H] À at m/z 355.0391, [2M-H] À at m/z 711.0904, and the MS/MS ion at m/z 337.0297, which results from the loss of a water molecule from m/z 355 (Pfundstein et al, 2010;Yang et al, 2012).…”

Galla Chinensis Attenuates Cigarette Smoke‐associated Lung Injury by Inhibiting Recruitment of Inflammatory Cells into the Lung

“…values of GC product revealed that it consisted mainly of gallic acid (GA) and its derivatives [19]. According to the deprotonated molecular ion mass number and UV-Vis spectrum, these peaks were identified as 3-galloylglucose (1GG, m/z 331) (peak 1) [19,21,22], gallic acid (GA, m/z 169) (peak 2) [19,20,22], di-gallic acid and its isomer (m/z 321) (peak 3, 4) [22], tetra-galloylglucose (4GG, m/z 787) (peak 5) [20][21][22][23], penta-galloylglucose (5GG, m/z 939) (peak 6) [20][21][22][23], hexa-galloylglucose (6GG, m/z 1091) (peak 7) [21][22][23], octa-galloylglucose (8GG, m/z 1395) and nona-galloylglucose (9GG, m/z 1547) (peak 8) [22,23], respectively ( fig. 1).…”

“…1. Compared to the major compound from the previous study, a series of gallotannins were identified from the chromatogram [20]. values of GC product revealed that it consisted mainly of gallic acid (GA) and its derivatives [19].…”