Secondary scent

While perfumes may be simple or complex, they all consist of three principle ingredients the main scent, secondary or blender scents, and a fixative. The main scent is usually potent, and is balanced by the secondary scents added to it. The fixative is a compound that holds the whole thing together. Some fixatives work best for certain scents. The example, the best fixative for lavender scent is orris root. 

Differentiation can be defined as the process of specialisation in terms of shape and function. An example is cell differentiation in plants, animals and humans a young cell, which is initially multifunctional, gradually acquires one specific function and shape. Specialisation is a refinement that is expressed in terms of shape, scent and colour. For example, fruits ripen, leaves change colour in the autumn, the growth of a shoot ends in a terminal bud and seeds become dormant. The primary components are converted into secondary components such as phenols, vitamins, aromas, wax, and so on. Thus differentiation in this context has a broader meaning than only the formation of a new plant organ . 

Kessler D, Baldwin IT (2007) Making sense of nectar scents the effects of nectar secondary... 

There are other small biomolecules, specific to certain types of cells or organisms. For example, vascular plants contain, in addition to the universal set, small molecules called secondary metabolites, which play a role specific to plant life. These metabolites include compounds that give plants their characteristic scents, and compounds such as morphine, quinine, nicotine, and caffeine that are valued for their physiological effects on humans but used for other purposes by plants. The entire collection of small molecules in a given cell has been called that cell s metabolome, in parallel with the term genome (defined earlier and expanded on in... 

Our destination that afternoon lay on the opposite coast, so rather than double back on the main roads, I took a secondary route across the island and was elated to find that the tailga-teurs had lost my scent. I could relax my grip on the wheel, drive at my ovm pace and enjoy the surroundings. When we got to a village that used flowers to spell out Bienvenue a St. Denis and Ave Maria on its hillsides, it was obvious we d... 

R = CH3, C10H12O2, Mr 164.20, 101.3 kPa 232.6 °C, dg 1.0883, ng 1.5171, occurs in a number of essential oils and is a volatile aroma component of many fruits and alcoholic beverages. Phenethyl acetate is a colorless liquid with a fine rose scent and a secondary, sweet, honey note. It is used in perfumery as a modifier of phenethyl alcohol, e.g., in rose and lilac compositions. In addition, it is used in a large number of aromas, in keeping with its natural occurrence. 

Individual secondary metabolites may be common to a number of species or may be produced by only one organism. Related species often have related patterns of secondary metabolite production and so a species can be classified according to the secondary metabolites they produce. Such a classification is known as chemical taxonomy. Occasionally, two plants are found to have identical physical aspects which botanists use for classification, but differ in the secondary metabolites they produce. For example, two flowers may look identical but one is odourless whilst the other possesses a strong scent due to the production of a fragrant terpenoid chemical. Such different strains are known as chemotypes. 

The majority of the processes presented in Table 2 involve combustion (e.g., burning candles) or the heating of a surface (e.g., electric element of a stove). The UFP from air fresheners and cleaners are the result of nucleation due to secondary chemical reactions with ozone. These secondary reactions are most commonly observed with pinene and limonene (and other terpenes) containing compounds found in pine and lemon scented cleaning products (Nazaroff and Weschler 2004). 

Anilinophenyl methacrylamide Butyraldehyde-aniline condensation product N,N -Di (n-octyl)-p-phenylenediamine N,N -Hexamethylene bis (3,5-di-t-butyl-4-hydroxyhydrocinnamamide) antioxidant, SBR latex Ditridecyl thiodipropionate antioxidant, scented candles Ethyl maltol antioxidant, seafood Citric acid monohydrate antioxidant, secondary ABS Tetrakis (2,4-di-t-butylphenyl)-4,4 -biphenylenediphosphonite... 

In some instances crop plants were also selected for a higher content of certain types of secondary products. Cultivated apples, pears and other fruits have a better aroma, i.e., contain more volatile secondary substances, and in addition to a higher sugar content are much more attractively colored than their wild progenitors. The pigments (E 5.5.2) and scent volatiles are usually nontoxic for humans, in contrast, for example, to the tanning substances which many of the wild forms of our cultivated fruits contain. 

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