The taming of fire, permitting the thermal processing of vegetable foodstuffs in particular, extended enormously the number of natural products that could be used as foods by humans and gave a tremendous impulse to the extraordinary dif￾fusion and development of the human population in almost every region of the world (De Bry, 1994). Foodstuffs can be roughly divided in two classes, those that are or are not edible in their raw form. The most important naturally edible foods are meat and milk, which are heated mainly for eliminating dangerous microorganisms, and some fruits, used by plants to attract animals for diffusing

Vitamins, by their definition, are essential to health and have to be obtained from the diet on a regular basis because, with the exception of vitamin D, they cannot be produced by the body. In terms of medicine and nutrition, our knowledge of vitamins is relatively recent. Although James Lind discovered an association

It may here be taken for grantedthat since the second half of the 20th century the Information Society may now be considered as running parallel to the 19th century Industrial Society. One of the striking effects of this development particularly made possible by the spread of digital technology is the commodification of information

Anything that can be offered to a market for attention, acquisition, use or consumption. Satisfies a want or a need. Includes: –Physical Products –Services –Persons –Places

All cereals contain a large proportion of starch. In its natural form, the starch is insoluble, tasteless, and unsuited for human consumption. To make it digestible and acceptable it must be cooked. Breakfast cereals are products that are consumed after cooking, and they fall into two categories: those made by a process that does not include cooking and which therefore have to be cooked domestically (hot cereals) and those which

Common, everyday water is a major consideration in a pharmaceu￾tical plant. The final product or any of its intermediate materials can only be as contaminant-free as the water available at that stage. Water may be an ingredient or used principally to wash and rinse product contact components and equipment. Water is also used to humidiethe air, to generate clean steam for sterilization, to cool or heat, as a solvent, for drinking and sanitary uses, etc. To better control this critical media

12.1 Introduction 12.2 Replicons can be linear or circular 12.3 Origins can be mapped by autoradiography and electrophoresis 12.4 The bacterial genome is a single circular replicon 12.5 Each eukaryotic chromosome contains many replicons 12.6 Isolating the origins of yeast replicons 12.7 D loops maintain mitochondrial origins 12.8 The problem of linear replicons

10.1 Introduction 10.2 Regulation can be negative or positive 10.3 Structural gene clusters are coordinately controlled 10.4 The lac genes are controlled by a repressor 10.5 The lac operon can be induced 10.6 Repressor is controlled by a small molecule inducer

英语新闻标题中的动词表示被动语态时，被动吾态结构\be 十过去分词\形式中的助动词\be， 通常被省略，也经常不用\by\来引出动作的执行者，剩下的过去分词在标题里就可直接表示 被动意义，读者切忌将之误解为该动词的过去式。如： GIRL OF 18 RAPED AFTER THREAT WITH BREAD KNIFE （＝A GIRL OF 18 RAPED AFTER THREAT WITH A BREAD KNIFE） 餐刀威逼下

Tools / Lists : - is a temporary selection of entities - can be used as immediate input to a select databox - can be given more permanence by storing it as a group