以益生菌Lactobacillus casei Zhang为研究对象,通过观察该菌株在普通MRS培养基中连续传代1 000代期间细胞形态、菌落形态、活菌数、浊度和菌株活力的变化对其稳定性进行了初步评价。结果表明,L.casei Zhang在1000代期间细胞形态与菌落...以益生菌Lactobacillus casei Zhang为研究对象,通过观察该菌株在普通MRS培养基中连续传代1 000代期间细胞形态、菌落形态、活菌数、浊度和菌株活力的变化对其稳定性进行了初步评价。结果表明,L.casei Zhang在1000代期间细胞形态与菌落形态没有发生变化;活菌数、浊度均和菌株活力随培养代数的增加呈现波动性变化,但波动幅度较小,总数基本维持不变。上述研究结果初步表明L.casei Zhang具有良好的稳定性,暗示其可用于产业化生产。展开更多
在25~30℃下,四川省遂宁市的酪蝇Piophila casei 各虫态均能良好地生长发育,卵在发育中需要较高的环境湿度,而幼虫的发育历期与温度和肉制品种类密切相关.在适宜的寄主和温度下,酪蝇14日内即可完成一个世代.酪蝇对高温的耐受力较强,且...在25~30℃下,四川省遂宁市的酪蝇Piophila casei 各虫态均能良好地生长发育,卵在发育中需要较高的环境湿度,而幼虫的发育历期与温度和肉制品种类密切相关.在适宜的寄主和温度下,酪蝇14日内即可完成一个世代.酪蝇对高温的耐受力较强,且因虫态而有很大差异,半数3龄幼虫可耐受6日40℃的温度,卵的发育起点温度不高于7~8℃,远远低于国外10~12℃的报道。作者还描述了酪蝇老熟幼虫弹跳行为的机制及成虫的行为、趋性,讨论了酪蝇的温度特性在肉制品安全贮藏和害虫防治上的参考价值.在3~4℃下是否导致酪蝇蛹的兼性滞育,尚待进一步研究.展开更多
AIM: To investigate the beneficial effect of the combination of butyrate, Lactobacillus casei, and L-carnitine in a rat colitis model.METHODS: Rats were divided into seven groups. Fourgroups received oral butyrate, L-...AIM: To investigate the beneficial effect of the combination of butyrate, Lactobacillus casei, and L-carnitine in a rat colitis model.METHODS: Rats were divided into seven groups. Fourgroups received oral butyrate, L-carnitine, Lactobacillus casei and the combination of three agents for 10 consecutive days. The remaining groups included negative and positive controls and a sham group. Macroscopic, histopathological examinations, and biomarkers such as tumor necrosis factor-alpha(TNF-α) and interlukin-1β(IL-1β), myeloperoxidase(MPO), thiobarbituric acid reactive substances(TBARS), and ferric reduced ability of plasma(FRAP) were determined in the colon.RESULTS: The combination therapy exhibited a significant beneficial effect in alleviation of colitis compared to controls. Overall changes in reduction of TNF-α(114.66 ± 18.26 vs 171.78 ± 9.48 pg/mg protein, P < 0.05), IL-1β(24.9 ± 1.07 vs 33.06 ± 2.16 pg/mg protein, P < 0.05), TBARS(0.2 ± 0.03 vs 0.49 ± 0.04 μg/mg protein, P < 0.01), MPO(15.32 ± 0.4 vs 27.24 ± 3.84 U/mg protein, P < 0.05), and elevation of FRAP(23.46 ± 1.2 vs 15.02 ± 2.37 μmol/L, P < 0.05) support the preference of the combination therapy in comparison to controls. Although the monotherapies were also effective in improvement of colitis markers, the combination therapy was much better in improvement of colon oxidative stress markers including FRAP, TBARS, and MPO.CONCLUSION: The present combination is a suitable mixture in control of experimental colitis and should be trialed in the clinical setting.展开更多
在低功率微波条件下,并采用水循环(20℃)冷却装置,对干酪乳杆菌鼠李糖亚种(Lactobacillus casei subsp.rhamnosus)CICC 6013进行诱变处理,通过对微波辐照功率和微波辐照时间做单因素平行实验,得到最高产酸量为124.15g/L的突变株W4-23,...在低功率微波条件下,并采用水循环(20℃)冷却装置,对干酪乳杆菌鼠李糖亚种(Lactobacillus casei subsp.rhamnosus)CICC 6013进行诱变处理,通过对微波辐照功率和微波辐照时间做单因素平行实验,得到最高产酸量为124.15g/L的突变株W4-23,比原始菌株产酸发酵量提高了53.45%,连续遗传8代,产酸性状稳定。研究结果表明,最佳诱变条件为在400W微波功率下辐照20min。展开更多
文摘在25~30℃下,四川省遂宁市的酪蝇Piophila casei 各虫态均能良好地生长发育,卵在发育中需要较高的环境湿度,而幼虫的发育历期与温度和肉制品种类密切相关.在适宜的寄主和温度下,酪蝇14日内即可完成一个世代.酪蝇对高温的耐受力较强,且因虫态而有很大差异,半数3龄幼虫可耐受6日40℃的温度,卵的发育起点温度不高于7~8℃,远远低于国外10~12℃的报道。作者还描述了酪蝇老熟幼虫弹跳行为的机制及成虫的行为、趋性,讨论了酪蝇的温度特性在肉制品安全贮藏和害虫防治上的参考价值.在3~4℃下是否导致酪蝇蛹的兼性滞育,尚待进一步研究.
基金Supported by Tehran University of Medical Sciences(partially)
文摘AIM: To investigate the beneficial effect of the combination of butyrate, Lactobacillus casei, and L-carnitine in a rat colitis model.METHODS: Rats were divided into seven groups. Fourgroups received oral butyrate, L-carnitine, Lactobacillus casei and the combination of three agents for 10 consecutive days. The remaining groups included negative and positive controls and a sham group. Macroscopic, histopathological examinations, and biomarkers such as tumor necrosis factor-alpha(TNF-α) and interlukin-1β(IL-1β), myeloperoxidase(MPO), thiobarbituric acid reactive substances(TBARS), and ferric reduced ability of plasma(FRAP) were determined in the colon.RESULTS: The combination therapy exhibited a significant beneficial effect in alleviation of colitis compared to controls. Overall changes in reduction of TNF-α(114.66 ± 18.26 vs 171.78 ± 9.48 pg/mg protein, P < 0.05), IL-1β(24.9 ± 1.07 vs 33.06 ± 2.16 pg/mg protein, P < 0.05), TBARS(0.2 ± 0.03 vs 0.49 ± 0.04 μg/mg protein, P < 0.01), MPO(15.32 ± 0.4 vs 27.24 ± 3.84 U/mg protein, P < 0.05), and elevation of FRAP(23.46 ± 1.2 vs 15.02 ± 2.37 μmol/L, P < 0.05) support the preference of the combination therapy in comparison to controls. Although the monotherapies were also effective in improvement of colitis markers, the combination therapy was much better in improvement of colon oxidative stress markers including FRAP, TBARS, and MPO.CONCLUSION: The present combination is a suitable mixture in control of experimental colitis and should be trialed in the clinical setting.
文摘在低功率微波条件下,并采用水循环(20℃)冷却装置,对干酪乳杆菌鼠李糖亚种(Lactobacillus casei subsp.rhamnosus)CICC 6013进行诱变处理,通过对微波辐照功率和微波辐照时间做单因素平行实验,得到最高产酸量为124.15g/L的突变株W4-23,比原始菌株产酸发酵量提高了53.45%,连续遗传8代,产酸性状稳定。研究结果表明,最佳诱变条件为在400W微波功率下辐照20min。