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In recent years, the Dongbei suancai industry in China had been developing continuously, however, the flavor of suancai fermented by inoculating with lactic acid bacteria needed to be improved. The effects of Chinese Baijiu on the flavor compounds of Chinese Dongbei suancai were investigated, and the quality evaluation model of volatile flavor components of suancai was established in this study. Results showed that although Baijiu had negative effects on the microbial growth, it could decrease the total titratable acid content and prevent excessive acidification of suancai. In addition, Baijiu increased the amount of the flavor compounds in inoculated fermented suancai. The contents of aldehydes showed a higher value in suancai fermented with 2% Baijiu concentration, while acids, esters, ketones and thiocyanates/isothiocyanates were higher at 5% and 8% Baijiu concentrations. Furthermore, the esters, ketones and sulfur compounds became the characteristic flavor of suancai fermented with Baijiu, simultaneously, the comprehensive scores of flavor components showed that 2% Baijiu could improve the flavor quality of suancai. The results of the study could contribute to the flavor quality improvement of Chinese Dongbei suancai, and also could provide the theoretical basis for understanding the flavor formation mechanism of Dongbei suancai. Practical applications: The results of this study determined an emerging fermentation method to obtain suancai products with intense aromatic flavor, simultaneously, provided a scientific basis for the improvement of the flavor quality of Chinese Dongbei suancai. [ABSTRACT FROM AUTHOR]

The first weighting control is one of the difficult problems that cannot be avoided in the safe and efficient production of longwall mining face. To optimize the existing pressure releasing technology of open-off cut, the open-off cut roof cutting pressure releasing (OCRCPR) technology is put forward on the basis of roof cutting pressure releasing gob-side entry retaining (RCPRGER) technology. Firstly, the mechanism of the technology and the design method of related key parameters are summarized. Then the pressure releasing effect of OCRCPR and the stress environment change under this technology are analyzed by mechanics calculation and numerical simulation, respectively, which verify the feasibility of the OCRCPR technology from the theoretical level. Finally, a test mining face is taken as an example to implement the field test. The field test results show that the OCRCPR can effectively shorten the first weighting step and weaken the first weighting strength and has a good pressure releasing effect. [ABSTRACT FROM AUTHOR]

Summary: Aim: To investigate the upstream therapeutic effects of fluvastatin and valsartan on hypertensive patients with non‐permanent atrial fibrillation (AF). Methods: A total of 189 patients who were admitted to outpatient and inpatient department from eight medical centers in China, diagnosed as hypertension with non‐permanent AF, were divided into four groups randomly: the CCBs group (group A, n = 45); CCB + fluvastatin group (group B, n = 48); valsartan group (group C, n = 46); valsartan + fluvastatin group (group D, n = 50). The four groups were followed up for 24 months. The blood routine, biochemical examination, echocardiography, high sensitive C‐reactive protein (hs‐CRP), N‐terminal pro‐brain natriuretic peptide (NT‐proBNP), the maintenance rate of sinus rhythm, and the recurrence of paroxysmal AF or persistent AF incidence were observed in these groups before and after 24 months' treatment. Results: After 24 months of follow‐up, there were 178 cases of patients who have completed the study. (a) There was no significant difference in blood routine, liver, and renal function in each group (P > 0.05). (b) The blood lipids level in groups B and D was significantly reduced after treatment (P < 0.01). There was no significant difference of hs‐CRP level in group A (P > 0.05). The left ventricular remodeling was significantly alleviated in group C and group D (P < 0.05). The NT‐ProBNP level was significantly decreased in group D (P < 0.05). (c) The sinus rhythm maintenance rate of group B, group C, and group D was higher than group A (77.78%, 70.45%, 79.17% vs 43.90%), the occurrence of persistent AF was significantly lower than group A (11.11%, 14.29%, 8.33% vs 31.71%; P < 0.05). Conclusions: CCB plus fluvastatin and valsartan can reduce the recurrence rate of non‐permanent AF and to delay the progression from non‐permanent AF to permanent AF in patients with hypertension. The combined application of valsartan and fluvastatin is more effective than valsartan or CCB alone in the upstream therapies of AF. [ABSTRACT FROM AUTHOR]