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添加剂对核桃乳的稳定效果研究 总被引:1,自引:0,他引:1
以核桃仁辅以牛奶为主要原料制成的核桃乳饮料,研究了添加剂对核桃乳稳定性的效果,结果表明:复合稳定剂具有最佳的稳定效果,其最佳配方为0.3%的CMC—Na、0.1%的PGA、0.1%的卡拉胶、0.2%的黄原胶,且加入0.2%的螯合剂柠檬酸三钠和0.1%的乳化剂SE对产品的稳定具有促进作用. 相似文献
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大气直接吸收的太阳辐射能量很少,对流层大气主要依靠地面长波辐射而增温,愈接近地面,空气受热愈多,反之愈少。因此,近地面大气温度随高度的增加而递减,其递减规律是:每七升100米温度下降0.6℃。 相似文献
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[原理呈现]一、热力环流
1.形成原因:如图所示
2.形成过程(1)受热不均引起大气垂直运动:若A地受热,近地面大气膨胀上升;B、C两地冷却,空气收缩下沉。(2)水平气压差异:A地上空空气密度加大,形成高气压;B、C两地上空空气密度减小,形成低气压。近地面气压差异相反,A地形成低气压,B、C两地形成高气压。 相似文献
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针对花岗岩石粉混凝土抗冻性问题,制备尺寸为100 mm的立方体混凝土试件,进行冻融循环试验,分别测定未冻融和冻融循环25、50、75、100、125和150次时花岗岩石粉混凝土试件抗压强度、质量损失率和动弹性模量,得到主要结果如下:花岗岩石粉混凝土抗压强度、质量损失率、相对动弹性模量与冻融循环次数分别呈负相关、正相关、负相关;冻融循环150次时,编号为S52C10试件抗压强度与其冻融前。抗压强度比值、质量损失率、相对动弹性模量分别为66.0%、1.81%和66.9%;试验表明当花岗岩石粉掺量在0%~20%范围时,掺量为10%的花岗岩石粉混凝土抵抗冻融破坏能力最强,试验结果可以为花岗岩石粉混凝土配合比设计提供参考。 相似文献
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人站在地面上对地面有一个向下的压力,茶杯放在桌面上对桌面也有一个向下的压力.人和茶林分别对地面和桌面都产生了压力.以上两种情况的庆力都是由物重产生的.有不少同学就说:“压力和重力是一回事.”或者说:“压力都是由初重引起的,大小等于物重,方向总是竖直向下的.”以上认识都是钻设的.首先,压力和重力从概念上来讲就是不同的.物理学中把垂直压在物体表面上的力叫做庆力;地面附近物体由于地铁吸引而受到的力叫做重力.从产生的机理看,压力作用在;立承面上,是两个物体相互挤压而2产生的一种作用力.物体间相互接s触是产… 相似文献
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《高中生地理》2005,(4):46-47
1.地震是指岩石圈在内力的作用下突然发生破裂,地球内能以地震波的形式释放出来,从而引起一定范围内地面震动的现象,自然界经常发生的一种危害最大的地质灾害。2.震源:地下发生地震的地方。3.震中:震源在地面上的垂直投影。4.震源深度:从震中到震源的深度。5.震中距:从观测点到震中的距离。6.震级:表示地震本身大小的等级划分。一次地震只有一个等级,用里氏为单位。7.烈度:地震对地表和建筑物等破坏强弱的程度。8.按成因分:构造地震、火山地震、诱发地震(水库地震)。9.构造地震的发生过程:岩石在地应力的作用下,倾斜或弯曲变形,当积累起来的地应力超过岩层限度时,岩层发生突然断裂或错位, 相似文献
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研究几种不同的机制砂对混凝土体积稳定性的影响。结果表明:机制砂中的石粉增加混凝土的早期开裂倾向,要加强早期养护;机制砂对于混凝土的干缩具有正负效应:当石粉含量较小时,负效应占优势,干缩率随石粉含量的增加而增大;当石粉含量超过一定值时,正效应占优势,干缩率随石粉含量的增加有减小趋势。 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
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Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities. 相似文献
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RUZBEHANI Mohsen 《重庆大学学报(英文版)》2004,3(1):20-25
1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec… 相似文献
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唐芳 《读与写:教育教学刊》2008,5(6)
During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context. 相似文献