scholarly journals The Effect of Different Tree Leaves Incorporation On the Growth and Nitrogen Availability to Wheat in an 15N Labelled Soil

2019 ◽  
Vol 3 (01) ◽  
2016 ◽  
Vol 2 (4) ◽  
pp. 18
Author(s):  
NIVASINI R.P ◽  
THILAGAMANI S ◽  
◽  
Keyword(s):  

2019 ◽  
Vol 104 (10) ◽  
pp. 1598-1609
Author(s):  
N. A. Galibina ◽  
L. L. Novitskaya ◽  
K. M. Nikerova ◽  
E. V. Moshkina ◽  
Yu. L. Moshchenskaya ◽  
...  

2021 ◽  
Vol 304-305 ◽  
pp. 108389
Author(s):  
Muqier Hasi ◽  
Xueyao Zhang ◽  
Guoxiang Niu ◽  
Yinliu Wang ◽  
Qianqian Geng ◽  
...  

Antioxidants ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 189
Author(s):  
Sana Ben-Othman ◽  
Hedi Kaldmäe ◽  
Reelika Rätsep ◽  
Uko Bleive ◽  
Alar Aluvee ◽  
...  

Polyphenolic compounds, plant secondary metabolites essential for plant survival, are known for their high antioxidant and anti-inflammatory activity. In addition, several polyphenols, such as phloretin, also have potential antiviral effects, making these compounds potential ingredients of biofunctional foods. A promising source for the extraction of phloretin is a by-product of apple production—apple tree leaves. Focusing on green technologies, the first aim of the present study was to optimize the direct ultrasound-assisted extraction conditions to gain the maximum yield of phloretin from air-dried apple leaves. For the optimization of process parameters, we applied the response surface method with Box–Behnken design. The optimal extraction conditions were extraction time 14.4 min, sonication amplitude 10% and 10 g of sample per 100 mL solvent (70% ethanol, w/w). Using these conditions, we assessed the content of individual and total polyphenolic compounds along with antioxidant activity in the leaves of different autumn and winter apple cultivars grown in Estonia. The analyses were carried out with chromatographic (HPLC-DAD-MS/MS) and spectrophotometric methods. The phloretin concentration ranged from 292 to 726 µg/g and antioxidant activity from 6.06 to 11.42 mg GA eq./g, these being the highest in the local winter cultivars ‘Paide taliõun’ and ‘Tellissaare’, respectively.


2021 ◽  
Vol 167 ◽  
pp. 107899
Author(s):  
Soi Keong Hoi ◽  
Birgitta Narindri Rara Winayu ◽  
Hsin Ta Hsueh ◽  
Hsin Chu

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