منابع مشابه
Vitality of optical vortices
Optical vortices are always created or annihilated in pairs with opposite topological charges. However, the presence of such a vortex dipole does not directly indicate whether they are associated with a creation or an annihilation event. Here we propose a method to distinguish between vortex dipoles that have just been created and those that are about to be annihilated. We use first and second ...
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Urban vitality is a new term in the specialized literature of urban planning. Despite numerous definitions of vitality by experts, These definitions are defined according to different aspects of vitality, equivalent to the socio-cultural characteristics of other countries. But vitality existed in cities before it became known in the urban literature and had different definitions in each culture...
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Sperm vitality is a reflection of the proportion of live, membrane-intact spermatozoa determined by either dye exclusion or osmoregulatory capacity under hypo-osmotic conditions. In this chapter we address the two most common methods of sperm vitality assessment: eosin-nigrosin staining and the hypo-osmotic swelling test, both utilized in clinical Andrology laboratories.
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MANY OF those who share an interest in the life sciences today, perhaps most, would agree with the claim that vitalism is obsolete. Some prominent biologists now use ‘vitalism’ as a derogatory label associated with lack of intellectual rigour, anti-scientific attitudes, and superstition (see, e.g., Dawkins, 1988). Other scientific commentators treat the term more seriously, but equally arrive a...
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Introduction: Joy and cheerfulness is the missing thing of contemporary man and the common desire of all people. Man is a purposeful being who seeks joy, happiness, and prosperity, and he does not feel joy, happiness, and prosperity until he achieves what he wants. The cheerfulness is one of the factors affecting economic, social, cultural, and political development and promotes sustainable dev...
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ژورنال
عنوان ژورنال: Nature
سال: 1908
ISSN: 0028-0836,1476-4687
DOI: 10.1038/079160b0