Fast range query estimation by N-level tree histograms

2004 ◽  
Vol 51 (2) ◽  
pp. 257-275 ◽  
Author(s):  
Francesco Buccafurri ◽  
Gianluca Lax
Keyword(s):  
Range Query ◽  
N Level ◽  
Query Estimation

Efficient histogram-based range query estimation for dirty data

2018 ◽  
Vol 12 (5) ◽  
pp. 984-999
Author(s):  
Yan Zhang ◽  
Hongzhi Wang ◽  
Long Yang ◽  
Jianzhong Li
Keyword(s):  
Range Query ◽  
Dirty Data ◽  
Query Estimation

Range query estimation with data skewness for top-k retrieval

2014 ◽  
Vol 57 ◽  
pp. 258-273 ◽  
Author(s):  
Anteneh Ayanso ◽  
Paulo B. Goes ◽  
Kumar Mehta
Keyword(s):  
Range Query ◽  
Data Skewness ◽  
Query Estimation

scholarly journals Actinidia arguta Leaf as a Donor of Potentially Healthful Bioactive Compounds: Implications of Cultivar, Time of Sampling and Soil N Level

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 3871
Author(s):  
Jan Stefaniak ◽  
Barbara Łata
Keyword(s):  
Antioxidant Capacity ◽  
Plant Development ◽  
Growing Season ◽  
Trolox Equivalent Antioxidant Capacity ◽  
Total Phenolic ◽  
Development Phase ◽  
Soil N ◽  
Actinidia Arguta ◽  
N Level ◽  
N Fertility

The aim of this study was to assess the enzymatic and non-enzymatic antioxidant status of kiwiberry (Actinidia arguta) leaf under different N regimes tested three times in field conditions during the 2015 growing season in two cultivars (‘Weiki’ and ‘Geneva’). Leaf total antioxidant capacity using ABTS, DPPH and FRAP tests was evaluated in the years 2015 to 2017, which experienced different weather conditions. Both cultivars exhibited a significant fall in leaf L-ascorbic acid (L-AA) and reduced glutathione (GSH) as well as global content of these compounds during the growing season, while total phenolic contents slightly (‘Weiki’) or significantly (‘Geneva’) increased. There was a large fluctuation in antioxidative enzyme activity during the season. The correlation between individual antioxidants and trolox equivalent antioxidant capacity (TEAC) depended on the plant development phase. The study revealed two peaks of an increase in TEAC at the start and end of the growing season. Leaf L-AA, global phenolics, APX, CAT and TEAC depended on the N level, but thiol compounds were not affected. Over the three years, TEAC decreased as soil N fertility increased, and the strength of the N effect was year dependent. The relationship between leaf N content and ABTS and FRAP tests was highly negative. The antioxidant properties of kiwiberry leaves were found to be closely related to the plant development phase and affected by soil N fertility.

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