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Compounds 4-21 were evaluated for cytotoxic activity against a panel NCI-H460 (lung), MCF7 (breast) and SF-268 (CNS) cancer cell lines.
      
Synthesis and evaluation of 1-benzhydryl-sulfonyl-piperazine derivatives as inhibitors of MDA-MB-231 human breast cancer cell pr
      
The title compounds were evaluated for their efficacy in inhibiting MDA-MB-231 breast cancer cell proliferation.
      
The growth processes of height and diameter at breast height were divided into three stages: a fast growing period, a stable growing period and a slow growing period.
      
Results showed that the tree's sapwood area was closely related to diameter at breast height (DBH).
      
Diameter at breast height (DBH) was positively related to the contents of organic matter in the soil, and the contents of N, P and K in the tree leaves had correlation coefficients of 0.967, 0.955, 0.988 and 0.972, respectively.
      
Diameter at breast height (DBH) and tree height in the intercropped plantation were 50.5%-136.7% and 27%-59.5% higher than those of the CK, respectively.
      
The results revealed that direction and degree of slope, average diameter at breast height in populations, and population density were the main influencing factors.
      
Through the analysis of the diameter at breast height in the sample plot, it was found that the distribution of the diameters and the corresponding sapwood area was exponentially correlated, with the coefficient of correlation being 0.976,7.
      
Variation of traits that include height, diameter at breast height (DBH), stem volume, crown width, straightness, wood basic density, tracheid length and width of open-pollinated progenies from clonal seed orchard of Pinus massoniana was analyzed.
      
3) The increment of diameter at breast height, timber volume and trunk stock of the low density forest increased yearly without the effect of density.
      
Following the principles of runoff-collecting forestry and applying the forest structure investigation results, the authors developed a formula to calculate appropriate density for forests on the basis of different diameters at breast height (DBH).
      
Nighttime water recharge had no significant correlation with environmental factors, but was well correlated with the diameter at breast height, tree height, and crown size.
      
These kinds of equations were also used to fit the relationship between total tree biomass, branch biomass, foliage biomass and tree diameter at breast height (D), tree height (H), D3 and D2H, respectively.
      
Our study shows that the biomass of a single tree of each tree species is closely related to the diameter at breast height (DBH) and to tree height.
      
Habitat use was dictated by tree diameter at breast height, shrub height and coverage at 2.0 m.
      
The average height and diameter of the reeds at breast level were significantly correlated with the average water depth.
      
When the average water depth was 0.3 m, the average density and coverage of reeds reached the apex value, while the height and diameter of the reeds at breast level increased with the water depth.
      
Determination of telomerase activity in stem cells and non-stem cells of breast cancer
      
In this study, telomerase activity was measured and compared in breast cancer stem cells and non-stem cells that were phenotypically sorted by examining surface marker expression.
      
 

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