Protein FT-IR amide bands are beneficial to bacterial typing

A graphene oxide-based sequential nanocatalyst for efficient tumor combination therapy

“…Instead, the amide I band and II band vibration peaks at 1660 cm −1 and 1534 cm −1 appear in the PMO@GO-GOD spectrum (Fig. 3b), 44,45 which indicates GOD is successfully conjugated in the PMO@GO by the amino-carboxyl reaction. Then, the glucose oxidase activity of PMO@GO-GOD was tested.…”

“…A vibration peak at about 1722 cm −1 (attributed to the C=O band) is observed in PMO@GO, 43 while not clearly identified in PMO@GO-GOD. Instead, amide I band and II band vibration peaks at 1660 cm −1 and 1534 cm -1 appear in PMO@GO-GOD spectrum (Figure 3b) 44,45 , which indicates the GOD is successfully conjugated in the PMO@GO by amino-carboxyl reaction. Then, the glucose oxidase activity of PMO@GO-GOD was tested.…”

Investigating the chemical pathway to the formation of a single biofilm using infrared spectroscopy

“…We also report a shift of 14 cm −1 in the phospholipid region and a convergence of two peak at 935/895 cm −1 in the planktonic sample, to a single peak at 919 cm −1 in the biofilm samples. All of these spectral alterations, that remained the same in two different growth media, indicate the development of a different chemical composition in the sample once a biofilm has begun to form [ 33 ]. For comparison a non-biofilm forming S. epidermidis strain (ATCC 12228) was incubated in NB for 72 h [ 34 ].…”

FT-IR measurement as a simple tool for following formation of acidic functional groups in maleic anhydride containing polymers

“…There are no doubts about advantages of FT-IR measurement as it is a prompt, low cost technique without damaging of the sample investigated [ [1] , [2] , [3] , [4] , [5] ]. Carbonyl Index (CI) is already used to determine extent of oxidation of polyolefins since 50 years because oxygen-containing functional groups such as carbonyl groups appearing in the polymer chains provide stretching vibrations in the FT-IR spectrum in a well-isolated range between 1900 cm −1 and 1650 cm −1 [ [6] , [7] , [8] ].…”