Cs₂CO₃-promoted P-N coupling reaction of H-phosphoryl compounds with <i>N</i>-tosylhydrazones to afford <i>N</i>-phosphorylhydrazones via diazo intermediates

The Cs2CO3-promoted P-N coupling reaction of H-phosphoryl compounds and N-tosylhydrazones is reported. Formally, this transformation represents an interesting example of exchanging the sulfur and phosphorus functionalities to convert N-tosylhydrazones to N-phosphorylhydrazones. The reaction may take place via the nucleophilic interception of the in-situ generated diazo intermediates by H-phosphoryl compounds at the terminal nitrogen atom.</p

MOESM1 of The high-affinity IgG receptor FcÎłRI modulates peripheral nerve injury-induced neuropathic pain in rats

Additional file 1: Materials and Methods, Supplementary Figures and Table

Development of ic-ELISAs for the Detection of Bisphenol A Diglycidyl Ether and Its Derivatives in Canned Luncheon Meats

Canned foods are widely consumed because of their convenience, hygiene, and nutrition. Bisphenol A diglycidyl ether (BADGE), an industrial product of epichlorohydrin and bisphenol A, widely exists in the inner coating of canned foods. A hydrolysis or chlorination reaction of BADGE can occur in the process of storage, forming a variety of derivatives such as bisphenol A (2,3-dihydroxypropyl) glycidyl ether (BADGE·H2O), bisphenol A (3-chloro-2-hydroxypropyl) glycidyl ether (BADGE·HCl), and bisphenol A (3-chloro-2-hydroxypropyl) (2,3-dihydroxypropyl) glycidyl ether (BADGE·HCl·H2O), which seriously threaten consumer’s health. In this research, two haptens were successfully synthesized, and antibodies were obtained by the subcutaneous immunization of New Zealand rabbits. Indirect competitive enzyme-linked immunosorbent assays (ic-ELISAs) were established for the detection of BADGE, BADGE·H2O, BADGE·HCl, and BADGE·HCl·H2O, and the IC15 values (concentrations at an inhibition rate of 15%) were determined as 0.73, 0.39, 0.78, and 1.45 ng/mL, respectively. The recovery of BADGE and its derivatives at various spiking levels in canned luncheon meat samples ranged from 76.70 to 98.35%. The results detected by the proposed ic-ELISAs were also validated by HPLC analysis, which showed a good agreement (R2 = 0.9861)

Table1_Analysis of Volatile Flavor Compounds of Corn Under Different Treatments by GC-MS and GC-IMS.DOCX

To establish a rapid and accurate method for detecting volatile components of corn, which will guide the production of corn products beloved by consumers. The fingerprints of corns under different treatments, including native, washing, blanching, precooling, freezing, steaming, boiling, frying, and freeze-drying, were depicted via gas chromatography ion mobility spectrometry (GC-IMS) and gas chromatography-mass spectrometry (GC-MS). It was found via the Venn diagram and relative odor activity value (ROAV) that n-hexanal, 1-octene-3-ol, decylaldehyde, and 2-pentylthiazole could be the key flavor compounds present in corns. In addition, according to volatile fingerprint characteristics and the aroma profile of sensory evaluation, it was found that corns could be divided into four categories, which was consistent with the results of GC-IMS. Also, the results of the sensory panel showed that steamed, boiled, and fried corns were much more popular than corns under other treatments with the panel. The results indicated that a rapid method to classify products was established by GC-IMS. A suitable processing technology could produce a specific flavor, and further refined research might be focused on finding the best way to process corns.</p

MOESM1 of Production of enantiopure (R)- or (S)-2-hydroxy-4-(methylthio)butanoic acid by multi-enzyme cascades

Additional file 1. Addtional figures and tables

A Superacid-catalyzed Synthesis of Fluorescent Covalent Triazine Based Framework Containing Perylene Tetraanhydride Bisimide for Sensing to O-nitrophenol with Ultrahigh Sensitivity

A mesoporous covalent triazine framework, PCPDI, was synthesized via an aromatic nitrile trimerization reaction of N,N′-di(4-cyanphenyl)- 3,4,9,10-tetracarboxydiimide (CPDI) by CF3SO3H catalyzed at 40 °C and this method avoids the use of noble metal catalyzers or high temperature reaction. PCPDI exhibits high thermal stability and strong fluorescence. The PCPDI shows ultrahigh sensitivity to tracing o-nitrophenol in chloroform with KSV constant of 1.74 × 105 L mol−1 and detection limit (LOD) of 1.72 × 10−11 mol L−1.</p

Diffusion- and Reaction-Limited Growth of Carbon Nanotube Forests

We present a systematic study of the temperature and pressure dependence of the growth rate of vertically aligned small diameter (single- and few-walled) carbon nanotube forests grown by thermal chemical vapor deposition over the temperature range 560−800 °C and 10−5 to 14 mbar partial pressure range, using acetylene as the feedstock and Al2O3-supported Fe nanoparticles as the catalyst. We observe a pressure dependence of P0.6 and activation energies of <1 eV. We interpret this as a growth rate limited by carbon diffusion in the catalyst, preceded by a pre-equilibrium of acetylene dissociation on the catalyst surface. The carbon nanotube forest growth was recorded by high-resolution real-time optical imaging

Diffusion- and Reaction-Limited Growth of Carbon Nanotube Forests

We present a systematic study of the temperature and pressure dependence of the growth rate of vertically aligned small diameter (single- and few-walled) carbon nanotube forests grown by thermal chemical vapor deposition over the temperature range 560−800 °C and 10−5 to 14 mbar partial pressure range, using acetylene as the feedstock and Al2O3-supported Fe nanoparticles as the catalyst. We observe a pressure dependence of P0.6 and activation energies of <1 eV. We interpret this as a growth rate limited by carbon diffusion in the catalyst, preceded by a pre-equilibrium of acetylene dissociation on the catalyst surface. The carbon nanotube forest growth was recorded by high-resolution real-time optical imaging