The phrase "acid index" is correct and usable in written English.
It can be used in contexts related to chemistry, finance, or health, where it refers to a measure of acidity or a specific index related to acid levels.
Example: "The acid index of the solution was measured to determine its potential for corrosion."
Alternatives: "acidity level" or "pH index".
To relate the AA quality of biofloc and feed, the essential amino acid ratio (A/E), and essential amino acid index (EAAI) were estimated.
Each nonapeptide is represented by hundreds of amino acid properties collected by Amino Acid Index database (http://www.genome.jp/aaindex) and transformed into a numeric vector with 4554 features.
In particular, 4D-CHAINS combines sequential information present in the 4D-HCNH TOCSY and intraresidue information present in 4D-HCNH NOESY 13C 1H planes, respectively, by clustering TOCSY or NOESY peaks to Amino Acid Index Groups (AAIGs) via their common 15N 1H frequency (Supplementary Figure 3).
In the proposed method, we have combined orthonormal encoding (OE) and the binary representation of selected 10 best physicochemical properties of amino acids derived from Amino Acid Index Database (AAindex).
Study Design: In a case-cohort study of 125 women, ploidy, S-phase fraction, proliferative index, deoxyribonucleic acid index, proliferating cell nuclear antigen, MIB-1 proliferation marker, p53 tumor suppressor gene, and cytoplasmic HER-2/neu oncogene and bcl-2 expressions were quantitated.
essential amino acid index.
Nakai, K., Kidera, A. & Kanehisa, M. Cluster analysis of amino acid indices for prediction of protein structure and function.
Physicochemical properties of the linker regions were assessed using amino acid indices relative to different features: in general, MocR linkers are flexible, hydrophilic and display propensity for β-turn or coil conformations.
The final amino acid indices employed in the construction of the ProtFP descriptor set are listed in Additional file 1: Table S1.
The first right singular vectors were correlated with various amino acid indices including relative mutability, amino acid composition in protein interior, hydropathy, or turn propensity, depending on proteins.
The most correlated amino acid indices for the first 5 r-SVs are BEGF750103, MIYS990101, FAUJ880106, KOEP990101, and AURR980119 (see Table 1 for their descriptions).
