Moreover , since the frequencies of the two variants are different in different groups of people , whole populations may have different mixtures of emotional memory .
而且,由于这两种基因型出现的频率因人群的不同而不同,因此人类可能存在情感记忆的多种混合体。
When researchers increased the concentration of sucrose , a type of sugar , in mixtures containing s. salivarius frua and s. mutans , the beneficial bacterium lost its ability to prevent biofilm formation .
Common mixtures include sodium citrates , sodium borohydride ( also used to bleach wood pulp ) and ammonium compounds , all of which can be toxic to humans and the environment .
To find an appropriate material , dr kiser assembled a " library " of polymer mixtures and searched for one with the peculiar property of being liquid at room temperature , but solid at body temperature .
Waste management has tried pumping different mixtures through landfills to achieve the desired effect , and found that injections of out-of-date beer and soft drinks work better than water . It has managed to produce gas four times faster than normal and reduce the volume of the waste by up to 35 % .
These are fast-moving mixtures of hot gas and ash that can travel for considerable distances .
火山灰流是指热气和烟尘混合物的快速移动,而且移动的距离相当远。
New mixtures could also produce more hydrogen , and take a step closer to helping run hydrogen fuel cells .
新混合物也可以产生更多氢气,并离使用氢气燃料电池更近一步。
Researchers modeled the density and viscosity of various water-ice mixtures to determine how quickly such a pocket of liquid water-which is substantially denser than ice-might sink .