PMC

Extracted chemical shielding powder pattern spectra obtained via the MAT experiment. Each powder pattern is fit to yield the isotropic shift δ_iso, the asymmetry parameter, η (where 0≥η≥1), and the reduced anisotropy, d (□ = δ_iso - δ_ZZ), from which the PAS chemical shift tensor values, δ₁₁ δ₂₂, and δ₃₃, may be determined. The fits are constrained by the requirement that δ_iso (ω₁) = 1/3(δ₁₁ + δ₂₂ + δ₃₃) (ω₂). For the vanillic acid standard, (A) presents the extracted powder pattern for aromatic C-H fit with δ_iso = 118 ppm, η = 0.75, and d = -97 ppm; (B) presents the extracted powder pattern of aryl-OH fit with δ_iso = 142 ppm, η = 0.55, and d = -80 ppm; both sets of fit parameters are typical for these functional groups. The extracted powder patterns for Murchison exhibit considerable inhomogeneous broadening, (C and D). Extraction and fitting of the powder pattern of the central aromatic peak at 130 ppm, (C), yields a good fit to a single shielding tensor with δ_iso = 130 ppm, η = 0.5, and d = -105 ppm, consistent with substituted aromatic carbon (), note that in (E), the extracted 130 ppm powder pattern average powder pattern for Murchison IOM differs considerably from condensed aromatic carbon (). The extracted powder pattern at 142 ppm, (D) is fit to a single shielding tensor with δ_iso = 142 ppm, η = 0.8, and d = -108 ppm. Note that is powder pattern’s reduced anisotropy and symmetry differs completely from that of aryl-O, (F).

a Experimental powder X-ray diffraction spectra of indium phosphide quantum dots capped with myristate (C₁₄H₂₇O₂), palmitate (C₁₆H₃₁O₂), and stearate (C₁₈H₃₅O₂) ligands. b Simulated powder X-ray diffraction spectra of indium phosphide quantum dots capped with myristate, palmitate, and stearate ligands. c Experimental powder X-ray diffraction spectra of indium phosphide quantum dots initially capped with oleate (C₁₈H₃₃O₂) and after ligand exchange with octadecylphosphonate (C₁₈H₃₈O₃P). d Experimental powder X-ray diffraction spectra of indium phosphide quantum dots initially capped with stearate and after ligand exchange with oleylamine (C₁₈H₃₇N). Note that the powder X-ray diffraction pattern of stearate (C₁₈H₃₅O₂) capped indium phosphide quantum dots in d differs from the one in panel a as the quantum dots are larger and from a separate synthesis. Cu K- is the X-ray source for all experimental and simulated powder X-ray diffraction spectra.

Pattern of bacterial contamination in herbal medicine.
LL1 Limbe liquid 1, LL2 Limbe liquid 2, LL3 Limbe liquid 3, LL4 Limbe liquid 4, LL5 Limbe liquid 5, ML Mibawa liquid, LZL Lunzu liquid, LZP Lunzu Powder, LZT Lunzu Tablet, LP1 Lunzu powder1, LZP2 Lunzu powder 2, LP1 Limbe powder 1, LP2 Limbe powder 2, MP1 Mibawa powder 1, MP2 Mibawa powder 2. LP4 Limbe powder 4, LP5 Limbe powder 5, LP3 Limbe powder 3, LT1 Limbe tablet 1, MT Mibawa tablet.

XRD patterns (a) (pattern a-CSH standard, pattern b-CAS15 powder mixture, pattern c-CAS5 powder mixture, pattern d-CAS15SBF after soaking in SBF, pattern e-CAS5SBF after soaking in SBF; lines: M-monetite, A-HAP, H-CSH, unsigned lines represent TTCP); FTIR spectra (b) of CAS5 cement powder mixture, CAS5SBF after 7 days of soaking at 37 °C in SBF, CSD, CSH standards and (c) FTIR spectra of CAS5 and CAS15 after 10 min setting in 100% humidity (spectra CAS5 wet and CAS15 wet respectively) and CAS5 powder cement mixture (spectrum CAS5orig).