为提高鲜切苹果品质、延长货架期,探究超声-ε-聚赖氨酸盐酸盐复合处理鲜切苹果的最优参数及其保鲜效果。采用Box-Behnken设计,以菌落增长数为响应值,通过响应面法确定超声-ε-聚赖氨酸盐酸盐复合处理鲜切苹果的最佳参数。根据菌落总数...为提高鲜切苹果品质、延长货架期,探究超声-ε-聚赖氨酸盐酸盐复合处理鲜切苹果的最优参数及其保鲜效果。采用Box-Behnken设计,以菌落增长数为响应值,通过响应面法确定超声-ε-聚赖氨酸盐酸盐复合处理鲜切苹果的最佳参数。根据菌落总数、霉菌和酵母、色差、VC含量结果,评价超声-ε-聚赖氨酸盐酸盐复合处理对鲜切苹果贮藏期间的保鲜作用。结果表明,超声-ε-聚赖氨酸盐酸盐复合处理鲜切苹果的最优参数为:超声时间为10 min、超声温度为40℃、ε-聚赖氨酸盐酸盐浓度为0.2 g/L,切分前与切分后处理实际测定值分别为1.59 lg CFU/g、1.71 lg CFU/g,与预测值相对误差分别为3.92%、5.59%,拟合度高,模型可靠。利用优化的条件处理的鲜切苹果在4℃贮藏期间,细菌、霉菌和酵母增长速度显著低于(P<0.05)对照,VC未受到明显破坏,切分前超声-ε-聚赖氨酸盐酸盐复合处理组色差上升速度低于对照组。响应面法优化的超声-ε-聚赖氨酸盐酸盐复合处理鲜切苹果是可行的,其中切分前超声处理效果较好,货架期比对照组延长4 d。展开更多
Spinel compounds are of great interest in both fundamental and application-oriented perspectives due to the geometric magnetic frustration inherent to their lattice and the resulting complex magnetic states.Here,we ap...Spinel compounds are of great interest in both fundamental and application-oriented perspectives due to the geometric magnetic frustration inherent to their lattice and the resulting complex magnetic states.Here,we applied x-ray diffraction,magnetization,heat capacity and powder inelastic neutron scattering measurements,along with theoretical calculations,to study the exotic properties of chromite-spinel oxides CoCr_(2)O_(4) and MnCr_(2)O_(4).The temperature dependence of the phonon spectra provides an insight into the correlation between oxygen motion and the magnetic order,as well as the magnetoelectric effect in the ground state of MnCr_(2)O_(4).Moreover,spin-wave excitations in CoCr_(2)O_(4) and MnCr_(2)O_(4) are compared with Heisenberg model calculations.This approach enables the precise determination of exchange energies and offers a comprehensive understanding of the spin dynamics and relevant exchange interactions in complicated spiral spin ordering.展开更多
文摘为提高鲜切苹果品质、延长货架期,探究超声-ε-聚赖氨酸盐酸盐复合处理鲜切苹果的最优参数及其保鲜效果。采用Box-Behnken设计,以菌落增长数为响应值,通过响应面法确定超声-ε-聚赖氨酸盐酸盐复合处理鲜切苹果的最佳参数。根据菌落总数、霉菌和酵母、色差、VC含量结果,评价超声-ε-聚赖氨酸盐酸盐复合处理对鲜切苹果贮藏期间的保鲜作用。结果表明,超声-ε-聚赖氨酸盐酸盐复合处理鲜切苹果的最优参数为:超声时间为10 min、超声温度为40℃、ε-聚赖氨酸盐酸盐浓度为0.2 g/L,切分前与切分后处理实际测定值分别为1.59 lg CFU/g、1.71 lg CFU/g,与预测值相对误差分别为3.92%、5.59%,拟合度高,模型可靠。利用优化的条件处理的鲜切苹果在4℃贮藏期间,细菌、霉菌和酵母增长速度显著低于(P<0.05)对照,VC未受到明显破坏,切分前超声-ε-聚赖氨酸盐酸盐复合处理组色差上升速度低于对照组。响应面法优化的超声-ε-聚赖氨酸盐酸盐复合处理鲜切苹果是可行的,其中切分前超声处理效果较好,货架期比对照组延长4 d。
基金the financial support from the National Key Research and Development Program of China(Grant No.2022YFA1402702)the National Science Foundation of China(Grant Nos.U2032213 and 12004243)+8 种基金the National Science Foundation of China(Grant No.12274412)the Interdisciplinary Program of Wuhan National High Magnetic Field Center(Grant No.WHMFC 202122)Huazhong University of Science and Technologythe support from the National Natural Science Foundation of China(Grant No.52101236)Guangdong Basic and Applied Basic Research Foundation(Grant No.2021B1515140014)the Guangdong Provincial Key Laboratory of Extreme Conditionsfinancial support from the National Key Research and Development Program of China(Grant Nos.2021YFA1600201 and 2023YFA1607402)the support of NSF-DMR-2003117supported by a beamtime allocation RB1910163 from the Science and Technology Facilities Council。
文摘Spinel compounds are of great interest in both fundamental and application-oriented perspectives due to the geometric magnetic frustration inherent to their lattice and the resulting complex magnetic states.Here,we applied x-ray diffraction,magnetization,heat capacity and powder inelastic neutron scattering measurements,along with theoretical calculations,to study the exotic properties of chromite-spinel oxides CoCr_(2)O_(4) and MnCr_(2)O_(4).The temperature dependence of the phonon spectra provides an insight into the correlation between oxygen motion and the magnetic order,as well as the magnetoelectric effect in the ground state of MnCr_(2)O_(4).Moreover,spin-wave excitations in CoCr_(2)O_(4) and MnCr_(2)O_(4) are compared with Heisenberg model calculations.This approach enables the precise determination of exchange energies and offers a comprehensive understanding of the spin dynamics and relevant exchange interactions in complicated spiral spin ordering.
