[lemma=□] □
[lemma=bond] □
[lemma=strength] □
But DR-H is typically 100 kcal / mol versus a metal alkyl bond strength of 30 to 40 kcal / mol . Fourier transform infrared spectroscopy can give insight in the hydrogen bonding strength of the glass forming compounds . The tests on both materials had to be aborted before the bond strength of the materials could be ascertained , as the reinforcing rod embedded in the materials failed . To make a comparison of bond strength cylinders of 50N concrete were cast with the reinforcing rod also embedded . Chung , Niagara Mohawk Chair of Materials Research and professor of mechanical and aerospace engineering , has found that when short carbon fibers are added to cement mortar , the brick-to-mortar bond strength increases by as much as 150 percent . This test was to ascertain the materials bond strength to any reinforcing embedded within the material . Intramolecular hydrogen bonds strengths are correlated to the differences in the aromatic ring and amino nitrogen electron densities produced by the presence of the different substituints . The correlation between hydrogen bonding strength in the cytoplasmic glass and life span will be exemplified in developmentally defective mutant seeds of Arabidopsis and in propagules from different phyla . Proteins and some small metabolites increase both hydrogen bonding strength and Tg of sugar glasses . O hydrogen bond strengths appear to be correlated . The holistic structure and the bonding strength between the Nomex fabric and binder of the composite were enhanced significantly when the Nomex fabric was modified with bromine-etching and bromoacetic acid-grafting .