Sentences with word «fertilisation»

Career 2008: chair of Human Fertilisation and Embryology Authority; 1989 - 2008: reader in renaissance studies, Queen Mary, University of London; 1976 - 89: lecturer in English, Cambridge University; 1971 - 74: post-doctoral research fellow, Warburgh Institute.

France's national committee on bioethics has called for a clampdown on clinics offering an increasingly popular form of in vitro fertilisation in which a single sperm is injected directly into an egg.

The complex mechanisms which orchids have evolved to achieve cross-pollination were investigated by Charles Darwin and described in Fertilisation of Orchids (1862).

«Our results show that maize yields are expected to be negatively affected by climate change, while the impacts on wheat and soybean are generally positive, unless CO2 fertilisation effects have been overestimated»....

According to a widely - held view, fewer than one in three embryos make it to term, but a new study from a researcher at the University of Cambridge suggests that human embryos are not as susceptible to dying in the first weeks after fertilisation as often claimed.

Lindenthal, Langmann, Patsch, Lorkowski Hort (2013) «The ocean response to volcanic iron fertilisation after the eruption of Kasatochi volcano: a regional - scale biogeochemical ocean modelstudy.

The project will also define optimal recipes for fertilisation using products obtained from the process and demonstrate their agronomic properties.

Pregnancies are also lost after the first two weeks and currently published estimates of total embryo loss from fertilisation through to birth range from less than 50 % to 90 %.

After the «recklessness» of the decision by the UN Convention on Biological Diversity to move against ocean fertilisation experiments, one argued, we shouldn't «encourage international bodies to go around declaring moratoria».

This Boîte - en - Valise approach aims to encourage transportability of practice, the nurturing of collaboration and the cross fertilisation of artistic practice.

«We need to find ways to reduce these emissions caused by fertilisation without reducing the productivity of the system,» she added.

Pointing to estimates that the current value of the carbon dioxide fertilisation effect on global crop production is about $ 140 billion a year, he notes that this additional production has helped reduce hunger and advance human well - being.

A third group of women over 40 who had in vitro fertilisation with their own eggs had significantly less success, with only 11 per cent of attempts leading to pregnancy.

Because greater numbers of gametes gives one mating type a selective advantage — more chance of successful fertilisation — the other mating type will be forced to produce larger, and therefore fewer, gametes to enable the production of the larger zygote.»

Not long after Russ George set the regulatory alarm bells ringing, the London Convention, which regulates ocean dumping, and the Convention on Biological Diversity both passed resolutions banning iron fertilisation experiments except under restrictive conditions.

Dr Maruyama says their discovery could ultimately be useful for improving the success rate of plant fertilisation in agricultural production, for example.

If fertilisation occurs, the eggs may take up to a week before they attach themselves to the uterine wall.

The smaller eggs from overweight and obese women were less likely to reach a crucial stage of development called the «blastocyst», which occurs around five days after fertilisation when the embryo resembles a hollow ball of cells.

Researchers from New Zealand's University of Otago studying chinook salmon have provided the first evidence that «cryptic female choice» (CFC) enhances fertilisation success and embryo survival.

In the PNAS publication the Americans specifically name increased nitrogen fertilisation as an important option to increase crop yield per hectare and thereby decrease net GHG intensity.

The boreal forest will creep northwards, for example, as the permafrost thaws and carbon fertilisation increases.

In the Mediterranean Basin, CO2 - fertilisation impacts such as increased forest success in the eastern Mediterranean and Turkey and increased shrub cover in northern Africa are simulated if rainfall does not decrease (Cheddadi et al., 2001).

The future of this subspecies now lies in the development of in vitro fertilisation techniques and stem cell technology, costly and complicated procedures that have never before been attempted in rhinos.

The first page of Larsen's Human Embryology states that, `... [W] e begin our description of the developing human with the formation and differentiation of the male and female sex cells or gametes [sperm and egg], which will unite at fertilisation to initiate the embryonic development of a new individual».

«Biochar» - the seductive solution for carbon sequestration, soil fertilisation and development.

A woman undergoing advanced in vitro fertilisation treatment (IVF) is protected against sexual discrimination, the European Court of Justice says.

University of Otago researchers studying chinook salmon have provided the first evidence that «cryptic female choice» (CFC) enhances fertilisation success and embryo survival.

The vaccine would prevent fertilisation by triggering an immune response against proteins unique to the squirrel's sperm.

«While the reason for this association is difficult to explain, the potential factors could be the observed differences in cause of infertility, ovarian response, fertilisation rates and implantation rates, which are all independent predictors of IVF success.

More work is needed to determine whether the nutritional composition of the gift could make her less receptive to further matings or could in some way ensure that fertilisation occurs.

Even immature sperm that have been removed artificially from the testicles can achieve fertilisation if introduced into the egg in this way, allowing men with low sperm counts or with immobile or misshapen sperm to become fathers.

So no rats may mean more birds, meaning more fertilisation, meaning recovering habitats.

That is why long - awaited results from an ocean fertilisation test are good news (see «Geoengineering with iron might work after all»).

He clarified how human eggs mature, which hormones make it happen and at which point in egg development fertilisation with sperm is most likely.

Common agricultural fertilisation — costly and energy consuming — could add large amounts of nutrients to the oceans, with unknown results.

AmazonFACE is particularly interesting to me due to my involvement in modelling studies, which suggested the potential for very severe impacts of climate change on the Amazon forests, even with CO2 fertilisation taken into account.

Recent discovery of a faster - than - linear feedback in the emission of N2O and NO from soils in response to external N inputs is important, given the projected increases of N fertilisation and deposition increases in tropical countries (Matson et al., 1999).

«Rising acidification of the ocean could reduce fertilisation of marine invertebrates and might eventually wipe out colonies of sea urchins, lobsters, mussels and oysters, according to a study.

«We've gathered data targeting all the possible fears that have been raised [about ocean fertilisation],» George said.