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1、选修一生物技术实践高三生物组知识点一、传统发酵技术的应用1、几种常用发酵菌种的比较菌种项目酵母菌醋酸菌毛霉乳酸菌生物学分类真核生物原核生物真核生物原核生物代谢类型异养兼性厌氧异养需氧异养需氧异养厌氧繁殖方式适宜条件下出芽生殖二分裂生殖孢子生殖二分裂生殖生产应用酿酒酿醋制作腐乳制作泡菜发酵条件前期需氧,后期不需氧一直需氧一直需氧不需氧2、果酒、果醋、腐乳、泡菜制作中所用菌种及控制条件的比较制作内容比较项目果酒果醋腐乳泡菜所用菌种酵母菌醋酸菌主要是为霉乳酸菌控制条件O2的有无无氧有氧有氧无氧最适温度18℃~25℃30℃
2、~35℃15℃~18℃常温时间控制10~12天7~8天腌制8天左右腌制10天左右其他条件封闭充气口适时充气控制盐酒用量控制盐水比例相关反应式见下面constructionunittoensureaqualityinstallation,firsttopre-installedpivot,measuredthedoorbladeandthearmconnectingplate...Buttweld,finallyweldedpanelsbutt;leavesoneortwotypesofweldinginaccord
3、ancewithspecificationsfortheweldappearancequalityinspectionsandinternalultrasonictestingofwelds.8.2.4gategateleafAssemblyinstallation:spellthegroupmainlyusesthe8tontruckcraneand50toncrawlercraneinstallation.Firstsillaftercleaning,advanceintroductiontobuttresst
4、ankleveldetection.Lowerdoorleafliftlockedontobuttress,gatewatersealbaseplateverticaladjustthedoorleaf,reinforcedafterthelowerpartofthedoorleafinplace.Doorleavesalltheparagraphsafterhoisting,retestthedoorleafsizeanddistort,afterpassinginspectionbeforeweldingdoo
5、rleaf.Menyeshuiinstallation:duetobearingsliderinfactoryassembled,watersealedthesitethemaininstallationwork.TemporarywillwatersealplatepressureinsealedarticleShang,inleveldirectionandverticaldirectioncheckwatersealofstraightdegreeswhethermeetrequirements,Houwit
6、hMarkpenfromgatePanelofcheckwaterboltholewithindrawboltholeincheckwaterarticleShangoflocation,incorrespondingofmarkShangdrilloutsealedarticleofbolthole,withbolttrydressedHou,removedhasjointofwaterseal,withstronghotrubberofway,willwatersealfirmlystickreceivedin
7、with,formingHouwithwheelmachinegentlyprocessingruggedofsurface,andcheckwatersealroundheadsurfaceunevendegrees,eachacross0.5Mmeasuringis,Afterpassingon15 3、果酒、果醋、腐乳和泡菜制作过程的比较及亚硝酸盐含量的检测比较项目果酒和果醋制作腐乳的制作制作泡菜并检测亚硝酸盐含量制作原理果酒:无氧呼吸 果醋:有氧呼吸多种微生物发酵泡菜制作:乳酸菌无氧呼吸亚硝酸盐检测:在盐酸
8、酸化条件下,亚硝酸盐与对氨基苯磺酸发生重氮化反应后,与N-1-萘基乙二胺盐酸盐结合形成玫瑰红色染料实验流程图挑选葡萄→冲洗→榨汁→酒精发酵→醋酸发酵↓ ↓果酒 果醋让豆腐上长也毛霉→加盐腌制→加卤汤装瓶→密封腌制操作提示材料的选择与处理;防止发酵液被污染;控制好发酵条件。控制好材料的用量;防止杂菌污染。泡菜坛的选择;腌制的条件;测定亚硝酸盐含量的操作