Sentence examples for longevity difficult from inspiring English sources

In the context of aging research, this can make genetic effects on longevity difficult to reproduce when protocols are changed [ 13].

137 The role of leptin in sexual maturation makes associations between circulating leptin levels and longevity difficult since there is a positive correlation between age of reproduction and lifespan.

David Smith, professor of innovation management at Nottingham Business School, says pinpointing what enables business longevity is difficult, but some factors do crop up regularly.

Longevity is difficult to maintain". Suaya isn't worried.

An accurate composite picture of the influence of cigarette smoke and neutrophil longevity is difficult to generate because of a wide variation in experimental models and in methods of generating tobacco smoke preparations.

Although few would argue that the postponement of death is a tangible gain, the value of increasing longevity is difficult to translate into monetary terms, and there has often been an undue focus on the perceived negatives (health and social care costs, including pensions).

Jean-David Levitte, the French ambassador to the United States who has known Mr. Wolfensohn for many years, pointed to another side of Mr. Wolfensohn that explains his longevity in a difficult position: the organizational skills he learned as a businessman.

The lack of relevant data on future tree replanting rates, mortality, growth and longevity make it difficult to provide long-term prognoses for our case study.

However, separating the roles of insulin and IGF-1 in mammals and their relevance for human healthy longevity has been difficult and generated much controversy.

Yet Church noted that even identifying longevity genes is immensely difficult: "The problem is that the bowhead whale or the capuchin monkey or the naked mole rat, species that live a lot longer than their close relatives, aren't that close, genetically, to those relatives — a distance of tens of millions of genetic base pairs".

The ability to accurately predict genetic and environmental determinants of longevity has previously proven difficult.