Sentences with word «sublethal»

At field realistic doses, neonicotinoids cause a wide range of adverse sublethal effects in honeybee and bumblebee colonies, affecting colony performance through impairment of foraging success, brood and larval development, memory and learning, damage to the central nervous system, susceptibility to diseases, hive hygiene etc..

As examples of worrisome stresses, Pettis described sublethal doses of pesticides, under study in cooperative research with Galen Dively of the University of Maryland in College Park.

Differentiated cells can be coaxed into returning to a stem - like pluripotent state either by artificially inducing the expression of four factors called the Yamanaka factors, or as recently shown by shocking them with sublethal stress, such as low pH or pressure.

While at sublethal levels, insecticide damage may not be evident, even such low level exposure clearly contributes to the inability of a honeybee to forage and return to the hive, which could result in declining bee populations.

We therefore transplanted Rag2 − / − γc − / − mice, allogenic MRL mice and syngeneic 129SvJ mice with 2 × 106 HPCs after sublethal irradiation.

The reproduction rate may be reduced by sublethal long - term effects of synthetic pesticides used in conventional agriculture.

But a growing body of research suggests that sublethal exposure to the pesticides in nectar and pollen may be harming bees too — by disrupting their ability to gather pollen, return to their hives and reproduce (see «The buzz over bee health»).

Among the greatest concerns is that compounds in oil called polycyclic aromatic hydrocarbons (PAHs) could have long - term sublethal effects on marine organisms that were at the peak of their spawning season when the spill began.

But it has not been proved that they do this, or if sublethal effects occur and damage bee colonies on an important scale.

«The general feeling is that we need to move beyond mortality testing to sublethal testing that looks at the shortening of life span, disorientation, reduced vigor, and other things,» says Pettis, who has been in discussions with the U.S. Environmental Protection Agency (EPA) about developing newer, more sensitive pesticide tests.

Sublethal Photothermal Stimulation with a Micropulse Laser Induces Heat Shock Protein Expression in ARPE - 19 Cells.

Host: Dr. Brian MacVicar Speaker: Dr. Phil Barker, UBC Okanagan Title: Exercising Restraint: Using Sublethal Caspase Activity to Shape the Nervous System

Much of our knowledge about the direct sublethal and lethal effects of chloride contamination comes from single - species toxicity tests conducted under laboratory conditions.

We still don't know the lethal and sublethal tolerances of deep sea stony corals to changing ocean pH levels.

Longfin smelt exhibited a cellular stress response at a temperature below those at which they can be periodically found in the wild, suggesting that these fish may routinely experience sublethal temperature stress in the Delta.

Researchers at Michigan State University and the USDA - ARS's Carl Hayden Bee Research Center in Tucson, Ariz., are finding that sublethal doses of essential oils seem to offer mite - control benefits with fewer side effects.

Sublethal effects related to insect behavior have been described in other studies; even a few nanograms of active ingredient disturbed the sense of taste, olfactory learning and motor activity of the bees.»

Sublethal effects are treated as less urgent, yet neonics subject bees to a variety of sublethal effects with long - term, fatal consequences.

If the researchers added a sublethal dose of dengue virus type 2, the resulting infection was fatal.

A relatively new class of compounds, neonicotinoids not only can kill bees but also have «sublethal» effects on their behavior and foraging and come into contact with bees in different ways than older pesticides do, environmentalists worry.

The new methods also seek to better capture pesticides» sublethal and chronic effects on bees and shed insight on how the substances affect whole hives instead of focusing on individual bees.

«The sublethal effects of entanglement have not been considered.»

A sublethal dose of TTX allows the person to «die» and be «resurrected.»

Furthermore, simultaneous administration of NS1 with a sublethal dose of DENV2 results in a lethal vascular leak syndrome.

Beatty et al. show that inoculation of mice with DENV NS1 protein alone induces both vascular leak and secretion of inflammatory cytokines and that administration of NS1 with a sublethal dose of DENV2 leads to lethal vascular leak syndrome.

In my current research, I investigate the sublethal effects of neonicotinoids on olfactory processing and learning using in - vivo calcium imaging.

We also observed reduced American toad tadpole activity in communities exposed to the highest NaCl concentration, a sublethal effect.

The results were unexpected, as our animals were not treated with any immunosuppression other than the sublethal irradiation pre-HPC infusion, either pre - or post-transplantation.

For her doctorate she studied the sublethal effects of several pesticides (with an emphasis on the neonicotinoid imidacloprid) on honey bees at the USDA lab in Beltsville under the mentorship of Dr. Jeff Pettis.

A slew of new studies have shown that popular pesticides are likely decimating bee populations over the long - term and at the sublethal level, in other words while the pesticides don't kill the bees outright, their impacts may eventually lead to a complete breakdown of colonies.

Whether it's evidence that exposure to seed insecticide dust leads directly to bee deaths, or research showing that sublethal doses of neonicotinoids can disrupt breeding, navigation and other crucial functions in both honeybees and bumblebees alike, there are an increasing number of data points suggesting that we have something to worry about.