Combinatorial biosynthesis of `unnatural' natural products: the polyketide example. Chem. Biol. 2:355-362.Tsoi, C.J.; Khosla, C. Combinatorial biosynthesis of "unnatural" natural products: The polyketide example. Chem. Biol. 1995, 2, 355-362....
见第一段第一句:Natural flavorings and fragrances are often costly and limited in supply.因此选项D为答案。2、[解析] 是非题型。见第一段第二句的后半部分:For example,the vital ingredient in a rose fragrance is extracted from natural rose oil at a cost of thousands of dollars a pound;an ...
Can you give me anexampleof what you mean? 你能给我举个实例来解释你的意思吗? 牛津词典 Theexamplesare unique to this dictionary. 这些例证是这部词典独有的。 柯林斯高阶英语词典 Following theexampleset by her father, she has fulfilled her role and done her duty... ...
accounted for, but an oil deposit or forest is. These natural resources must be pumped, forested, or mined out of the ground in order to be used or sold. After the resources are extracted from the ground, they can become raw materials that are refined or used to produce other products....
Natural starters have been extensively used for many centuries to make many different fermented food products from different raw materials: Milk, meat, roots, vegetables, etc. The industrialisation of food production at the end of the 19th century necessitated the use of regular selected starters to...
warm.People now realize that this unhealthy situation must be changed,and that we must be able to develop in sustainable(可持续的)ways.That means growth with low carbon or development of sustainable products.In other words,we should keep the earth healthy while using its s...
Solar panels and other alternative energy sources power the resort and water comes from a natural spring. Single-use plastic is kept to a minimum, produce such as rock melon, okra and lemon grow in the resort’s organic farm, and barramundi and lobster come from Wa Ale’s o...
Here, we developed a novel framework to examine global food shortages from the Russia-Ukraine conflict and quantify the embodied environmental impacts of disturbed and alternative food supply chains. The conflict could soon bring a 50–120 Mt shortage of nine dominant food products and cause ...
They don't care whether their clothes are made of cotton or polyester (聚酯纤维). Even if you know what materials you're wearing, do you know how eco - friendly they are? Do you know where they were made? How much material is needed? Cotton is taken from natural plants. Many people...
aFor example, the domestic supply of biofuels and natural gas might be limited by a country’s resource base and transport costs making import non-profitable 例如, biofuels和天然气国内供应也许由国家的使进口的资源基础和运输费用限制非有益[translate]...