This article studied the effect of different salts and heating temperature on the binding of silver carp volatile compounds and myosin. The binding ability of myosin was determined by measuring the relative headspace concentration of the volatile compounds in the presence of each myosin using solid‐phase microextraction and GC/MS analysis. The results showed that: after treated with KCl and NaCl solution, the binding force between myosin and this four volatile compounds whole decreased; after treated with MgCl2 and CaCl2, the binding force between myosin and hexanal, heptanal, 1‐octene‐3‐alcohol decreased, and when its concentration were beyond 2.5 mol·L−1, the binding force between myosin and hexanol increased. After treated with different temperature, the binding force between myosin and hexanal, heptanal, 1‐octene‐3‐alcohol whole decreased and moreover, the higher the heating temperature the lower the binding force. On the contrary, the binding force between myosin and hexanol increased with the rose of heating temperature.
Practical applications
Silver carp (Hypophthalmichthysmolitrix) was selected as the preferred materials to product freshwater‐fish surimi because of its good gel‐forming ability. However, its application in surimi products is restricted due to the inherent smell thus reducing the value of the processing. Myosin which composed the important part of the meat is not only influence the surimi texture but also influence the release of volatile compounds. Hence, it is extremely essential to research the interaction between volatile compounds and fish protein.
Basalt fiber (BF) has received much attention in recent years for engineering practice and scientific research related to basalt fiber reinforced concrete (BFRC) due to its advantageous mechanical properties and cost-effectiveness. By researching its performance characteristics after cryogenic freeze–thaw cycles, the advantages of BFRC’s mechanical properties can be further exploited in order to expand its application scope. The effects of the fiber volume fraction, temperature gradient, and number of freeze–thaw cycles on the compressive strength, toughness index, splitting tensile strength, flexural strength, etc., of BFRC were investigated. Additionally, the damage mechanism of BFRC after freeze–thaw cycles was analyzed via scanning electron microscopy (SEM). The results show that the compressive strength of BFRC reaches its peak value when the fraction reaches 0.1% under the conditions of freezing and thawing cycles from room temperature to −80 °C. When the fraction of BFRC is 0.1%, and the maximum reduction is 17.1%, the splitting tensile strength decreased most sharply when the fraction was 0.1%, and the decrease amplitude was 40.9%, and the flexural strength decreased most acutely when the fraction was 0.3%, and the maximum decrease was 44.62%. The addition of basalt fibers can reduce the damage to the microstructure of concrete and improve its plastic degradation characteristics to a certain extent. With a decrease in the minimum temperature of the cryogenic freeze–thaw cycle, the optimal fiber content for compressive strength increases. Nevertheless, the splitting tensile strength and flexural strength of BFRC is improved as the fiber content increases under the cryogenic freeze–thaw environment.
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