共查询到20条相似文献,搜索用时 31 毫秒
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金针菇液体培养营养需求及培养条件研究 总被引:2,自引:0,他引:2
在装液量100mL/250mL三角瓶,接种量10%的基础上,以菌丝体生物量为指标,从实验室常见的5种碳源、6种氮源中,筛选出金针菇菌丝体生长的最适碳源、最适氮源和最适pH,并进一步通过正交实验优化出培养基的养分浓度和摇瓶发酵条件,从而确定金针菇摇瓶培养基组成为葡萄糖25g/L,NH4NO31.5g/L,KH2PO41.0g/L,MgSO4·7H2O0.5g/L,VB150mg/L;最佳发酵条件为23℃,起始pH6.0,摇床转速150r/min,发酵时间8d。 相似文献
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茯苓真菌液体发酵产多糖培养条件优化的研究 总被引:1,自引:0,他引:1
通过茯苓的摇瓶液体培养,确定了茯苓液体发酵的最适发酵培养基和最适培养条件,为大规模茯苓多糖的生产提供了参考性的依据,即:发酵温度26℃、摇瓶转速150 r/min、种子液接种量为6%、葡萄糖4%、蛋白胨0.75%、硝酸钾0.75%、pH值为5.5、装液量为80mL/250 mL. 相似文献
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利用肌苷废水从酸菜浆中分离筛选出的白地霉GC1菌株进行了摇瓶培养研究,通过影响因素试验确定了GC1生产单细胞蛋白的最适发酵条件,并对其发酵过程作动态分析.结果表明:培养基组成、初始pH值、温度、摇瓶转速与装液量均对该菌株生物量有影响;最适的培养基组成为:废糖蜜2%、酒石酸铵1%;培养条件为:初始pH5.5、摇瓶转速为50 r/min,装液量100 mL/250 mL,28℃培养周期2d.菌体生物量可达到为23.32 g/L,蛋白含量和产量可达到19.81 g/L和84.9%,同时高浓度肌苷废水的COD和色度被降低了30%和27%. 相似文献
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通过单因子实验,研究了装液量、培养基DH、培养温度、培养时间及转速对香菇菌丝摇瓶发酵的影响,结果表明,香菇液体深层发酵的培养基初始pH6,培养温度28℃,转速125r/min,装液量100ml/250mI三角瓶,发酵13d,干菌丝体得率高达7.00g/L,鲜味物质(α-氨基氮)产量达125mg/100mL。 相似文献
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采用摇瓶培养法对黄伞菌丝深层发酵培养条件进行了研究.通过正交试验初步确定黄伞菌丝深层发酵适宜的培养基组成为:葡萄糖3g/dL,牛肉膏1.5g/dL,K2HPO40.5g/dL,MgSO40.1g/dL.该菌株最适培养条件为:培养温度25℃,起始pH值5.0,接种体积分数15%,发酵周期10d.在优化的试验条件下,进行摇瓶发酵,菌丝干重达11.16g/L. 相似文献
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巴西革耳Lentinus striguellus深层发酵的研究 总被引:4,自引:0,他引:4
报道了巴西革耳Lentinusstriguellus深层培养的适宜发酵培养基、摇瓶发酵条件。试验结果表明 ,Lentinusstriguellus对单糖、双糖、多糖和糖醇都有一定的利用 ,但葡萄糖等单糖对菌丝生长效果较好 ;酵母粉等蛋白质含量高的氮源对菌丝生长较为有利 ;通过L9(3 4 )正交试验确定了Lentinusstrigullus发酵的最适培养基为 :5 %葡萄糖 ,0 .7%酵母粉 ,0 .2 %KH2 PO4,0 .3 %MgSO4·7H2 O ,0 .0 0 1%VB1 ;一定浓度内 ,Fe2 + 、Ca2 + 对菌丝体生长有促进效果。适宜的摇瓶发酵条件为 :培养基起始 pH5 .0~ 6.0、培养温度 2 6℃、接种量 10 % ,摇床转速为 2 0 0r/min ,2 5 0mL三角瓶最适装液量为 80mL ,发酵周期为 6d。 相似文献
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米根霉具有较强的产淀粉糖化酶能力。本研究通过对米根霉液态发酵工艺条件的研究来提高其产糖化酶能力,为红曲黄酒纯种酿造技术奠定基础。以米根霉为出发菌株,大米液化液作为碳源进行摇瓶发酵,通过正交试验优化液态培养基配方,并通过单因素试验得出米根霉的培养条件。优化的摇瓶发酵最佳培养基为:液化液浓度50%,NH4Cl 5 g/L,KH2PO41 g/L,MgSO4·5H2O 0.3 g/L,FeSO4·7H2O 0.4 g/L,CaCO38 g/L;发酵条件为:初始pH6.0,装液量50 mL,摇床转速150r/min,接种量6%,发酵温度为32℃。该发酵条件下,菌株摇瓶发酵液的糖化酶活力达到196.6 U/mL±8.1 U/mL。 相似文献
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A continuous culture study was conducted to evaluate the effect of two different yeast cultures on ruminal microbial metabolism. The treatments were a) control lactation ration, b) yeast culture 1 (YC1, Diamond-V XP) and c) yeast culture 2 (YC2, A-Max), both fed at an equivalent of 57 g/head per day. The results showed that both yeast culture products increased dry matter (DM) digestion, propionic acid production, and protein digestion compared with the control. Yeast culture 1 demonstrated an increase in molar percentage of propionic acid, a reduction in acetic acid, and a lower mean nadir (daily low) pH compared with YC2. Ruminal cultures treated with YC digested more protein and contributed less bypass N than control. Supplementing YC2 resulted in a tendency for higher microbial N/kg DM digestion than YC1. Yeast culture 1 resulted in production of rumen microbes containing less protein and more ash than YC2. These results support previous research findings that yeast culture does influence microbial metabolism, and specific yeast cultures may have different modes of action. 相似文献
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礼教文化深深影响着中国人的价值观、思维方式、政治理念和社会秩序的建构。传统服饰受礼教文化的制约明显,使得传统着装成为区分等级、地位和身份的标志。通过对近代齐鲁民间服饰着装中等级观念、审美意识以及情感诠释3个方面的研究,结合相关文献及对江南大学民间服饰传习馆传世实物的分析,阐述了礼教文化影响下的近代齐鲁服饰文化是一个由“顺受”至“逆反”发生流变的过程。在对“顺受”与“逆反”各自现象分析的基础上,指出近代齐鲁服饰文化之所以产生由“顺受”至“逆反”流变的原因是社会形态的改变与历史的变革,政府《服制通令》的颁布及西式教育的推广。这对进一步研究儒家文化、中国服饰文化和齐鲁民俗文化起到一定的补充和实证作用。 相似文献
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Margaret Somerville 《Pedagogy, Culture & Society》2005,13(1):5-26
This article is based on research into the practical problem of masculinity and learning and practising safety in the mining industry. The research began with a post-structural analysis of gendered subjectivity in miners' yarns but argues that a concept of 'culture' is needed to elucidate a middle-level relationship between individual workers and the organisation. Concepts of 'culture', however, are problematic in this context because they have been used uncritically in organisational literature. The author explores the enactment of a concept of 'culture' through an ethnographic study of mine workers. It was found that workplace cultures are characterised by violence and aggression, risk taking, and competitiveness, which impact on learning and practising safety. In emergent understandings of culture in this study the author suggests that 'culture' can be reconceptualised in order to involve workers in their own cultural analysis and to articulate the relationship between the complex, collective, and contested nature of contemporary workplaces and the learning that takes place there. Such a cultural analysis enables the possibility of identifying sites of change and 'culture' as a concept that can be mobilised as a technology for workers to intervene in their own workplace practices. 相似文献
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“女体盛”,日语意为用少女裸露的身躯作盛器,装盛大寿司的宴席。从事这种职业的人也称“艺伎”.挑选“女体盛”艺伎的要求非常苛刻。首先,必须是处女,因为日本男人认为只有处女才具备内在的纯情与外在的洁净.最能激发食客的食欲。其次是容貌要姣好:皮肤光润、白皙、体毛少;身材匀称,不能太瘦.太瘦缺乏性感;血型最好是“A”型——日本人普遍认为,具有“A”型血型的人,性格平和、沉稳.有耐心,最适合从事这种职业。 相似文献
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<正> 在市场经济大潮中,资本确实有力量,有生气,但毕竟有价,也有限。像联合利华,其资本不可谓不雄厚,但近日它却携其购买的洋“京华”,悄然离京。难道它不知道,洋“京华”离开京华故土,还能有什么作为?但是它不得不走,因为凭资本,它可以买断京华品牌,但却买不了“京华”茶叶深邃的文化内涵!在中国人手里,京华茶叶购销两旺,一旦变成串了味儿的洋京华,北京的老少爷们,还有哪个买帐?!实践证明,文化的力量确实不可轻视。 回想起在年初的一次食文化研讨 相似文献