Journal: Frontiers in Marine Science

Article Title: Substantial Biogeochemical and Biomolecular Processing of Dissolved Organic Matter in an Anticyclonic Eddy in the Northern South China Sea Down to Bathypelagic Depths

doi: 10.3389/fmars.2022.902728

Figure Lengend Snippet: FIGURE 4 | 1H NMR detected NMR spectra of CCCH3 groups of L05_1000m SPE-DOM; (A): most intense NMR cross peaks indicative of tert-butyl containing abundant molecules, with cross peaks from 1H, 13C DEPT-HSQC NMR spectra in red and those of 1H, 13C HMBC in blue color; (B): 1H, 13C DEPT-HSQC (red: CH3; green CH2) and 1H, 13C HMBC (blue) NMR spectra of L05_1000m SPE-DOM, shown down to lower cross peak amplitude; the common, contiguous cross peaks of biogeochemical organic matter show up in this display labelled by ellipsoids (cf. Figures S15, S16);. 1H, 13C HMBC cross peaks (blue color) represent common aliphatic branching mofis of DOM and relatively abundant molecules with considerable extent of aliphatic branching as exemplified by dC ranging down to dC ~55 ppm (CCCH units). (C): 1H, 13C HMBC cross peaks (blue color) demonstrating abundance of aromatic compounds (CarH and CarO units; dC ~ 120-160 ppm), a few carboxylic acids (dC ~ 165-185 ppm), and several ketones (dC ~ 195-220 ppm). Some of these units could represent to benzylic units of general character C6HxZ-Ca(CH3)n-Y3-n in which Z would represent aromatic substitution and Y oxygenated aliphatic and aromatic units, including carboxylic acids and ketones. The benzylic position Ca would not carry directly bound protons, and tert. butyl C4H9 then represents the most basic unit of such benzylic position. 13C NMR spectra are 13C single pulse (black) and CH2- selective (blue) 13C DEPT NMR spectra.

Article Snippet: HMBC spec t ra (he te ronuc l ear mul t ip l e bond coherence ; hmbcacbigplnd) were acquired with aq = 1 s, d1 = 0.5 s, F1 (13C): SW = 52083 Hz (258.8 ppm).13C NMR spectra were acquired with a Bruker Advance III NMR spectrometer operating at 500.13 MHz (Bo = 11.7 T) and used inverse gated WALTZ-16 decoupling (wideband alternating-phase low-power technique for zero residual splitting; 19 s relaxation delay; with an acquisition time (aq) of 1 s; 13C DEPT NMR spectra used aq = 1 s and d1 = 2 s; the one bond coupling constant 1J(CH) was 150 Hz; exponential line broadening was lb = 12.5 Hz.

Techniques:

Journal: World Journal of Stem Cells

Article Title: Stem cell homing, tracking and therapeutic efficiency evaluation for stroke treatment using nanoparticles: A systematic review

doi: 10.4252/wjsc.v12.i5.381

Figure Lengend Snippet: Magnetic resonance imaging features for stem cell homing evaluation

Article Snippet: Argibay et al[ 38 ] , PC - Bio Spec - Bruker; surface coil array , ImageJ (NIH) , 9.4 , MGE , T2*: 2.9/1.5 , 19.2 × 19.2; 192 × 192; 1.0 , 4 h.

Techniques: Magnetic Resonance Imaging, Imaging