YEAST ... AND BREAD COMES ALIVE 酵母给面包以生命 乐斯福烘焙中心 SACCHAROMYCES CEREVISIAE/酵母菌 Yeast is /酵母是 a living organism/一种生物组织 an unicellular fungi/一种单细胞真菌 Yeast is used in many major industries 酵母在许多主要工业中运用 - Distilling/酿酒业 - Beer industry/啤酒业 - Wine industry/葡萄酒业 - Flavor industry/调味品业 Pharmaceutical industry/制药业 - Food industry/食品工业 - Cattle feed/饲料业 - and Baking industry.../烘焙行业 YEAST IN HISTORY/酵母的历史 1860 : Louis Pasteur evidenced that live organisms caused fermentation to happen/1860年，路易。巴斯德证明生物是导致发酵的原因。 1872 : Max de Springer built the first yeast plant in Paris./1872年，马克思，德，斯普林在巴黎建造了第一个酵母厂。 Ancient civilisations (Egyptians, Greeks...)made bread using yeast yet not being aware of it./古代文明（埃及，希腊。。。）用酵母来做面包，但他们还没有意识到这一点。 YEAST FUNCTIONS IN A DOUGH 面团中酵母的功能 Fermentation: C6 H12 O6 ----->CO2 + C2 H5 OH(without oxygen) 发酵： C6 H12 O6 ----->CO2 + C2 H5 OH （无氧发酵） Main purpose/主要功能 = leavening/发酵 Flavors and aroma are developped 产生口感和香味 Gluten is mellowed/面筋成熟 (maturing of the dough) pH decreases pH值降低