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Business community June 28 hearing

Hydrofluoric acid commodity index June 27 to 59.44, unchanged from yesterday, the highest point in the cycle compared with 100.00 points (2011-09-01) decreased by 40.56%, compared with January 19, 2016 the lowest point of 54.10 points, up 9.87% . (Note: refers to the period since 2011-09-01)

While in June 24 ,Yantai Sino-Swiss hydrofluoric dynamic sales are:

Business community June 24 hearing

Yantai Rui Chemical Co., Ltd. The main products are F113A, anhydrous hydrogen fluoride, hydrofluoric acid and other fluorine chemical products.

Hydrofluoric acid unit into five runs, quoted in the 6800 yuan / ton, the normal sales, hydrofluoric acid means two lines open, temporarily tight supply.

(Source: Business News Agency)

(The content provided in this news can not be guaranteed and assured to be accurate, appropriate for all,  and our company can not be held responsible for any error or negligence derived therefrom.)

 Following hydrofluoric acid (HF) treatment, tau paired helical filaments (PHF) proteins are heat- and acid-stable, soluble in 2-(N-morpholino)ethanesulfonic acid buffers and display the same molecular weight, pI, and immunochemical properties as normal tau s. Alkaline phosphatase treatment of dissociated PHF results in similar, although less extensive, electrophoretic changes and a reduction in PHF-1 immunoreactivity. Therefore, phosphorylation of normal tau s appears to be responsible for the distinct properties of tau PHF. Although our results suggest that all of the normal tau isoforms are in PHF, the relative abundance of individual tau species differs in HF-treated PHF and tau s samples. 

Moreover, the loss of PHF following hydrofluoric acid treatment suggests that post-translational modifications contribute to the structural stability of PHF.

The small organic matter content of mineral soils makes it difficult to obtain 13C and 15N nuclear magnetic resonance (NMR) spectra with acceptable signal-to-noise ratios. Subjecting such samples to hydrofluoric acid removes mineral matter and leads to a relative increase in organic material. The effect of treatment with 10% hydrofluoric acid on bulk chemical composition and resolution of solid-state 13C NMR spectra was investigated with six soils, some associated particle size fractions, plant litter and compost. The treatment enhanced the signal-to-noise ratio of the solid-state 13C NMR spectra. The improvement in spectrum quality was greatest in the clay fraction of soil contaminated with coal ash. The removal of paramagnetic compounds associated with the ash may be the main reason for the improvement. Based on total C, total N, C/N ratio and intensity distribution of the solid-state 13C NMR spectra, no changes in organic matter composition could be detected, except for a possible loss of carbohydrates. After treatment with HF, solid-state 15N NMR spectra of particle size fractions were obtained and indicated that the observable nitrogen is present mostly as peptides and free amino groups. Extraction with hydrofluoric acid is recommended as a routine treatment prior to solid-state 13C and 15N NMR on soil containing little C or N and soil samples containing paramagnetic compounds from natural or anthropogenic sources.