Results 191 to 200 of about 13,932 (240)

Risks of Neonicotinoid Pesticides

Science, 2013
writes that the use of neonicotinoid insecticides has been tl y restricted because of their fects on pollinators. Neonicotinoid to v er tebrates due to their high to xicity , en vironmental persistence, w ater solubility , and poten ...
Guangming, Zeng, Ming, Chen, Zhuotong, Zeng   +2 more
openaire   +2 more sources

Neonicotinoide

Biologie in unserer Zeit, 2019
Wie kein anderes Insekt steht die Honigbiene (Apis mellifera) für den Rückgang von Bestäubern und die ökologische Krise durch Überdüngung, Habitatfragmentierung, Verlust der biologischen Vielfalt in Gärten und landwirtschaftlich genutzten Flächen sowie übermäßigen Pestizideinsatz.
openaire   +1 more source

Receptor Structure-Guided Neonicotinoid Design

Journal of Agricultural and Food Chemistry, 2010
Neonicotinoid agonists with a nitroimino pharmacophore are used worldwide for crop protection and animal health care. Chemical and structural biology investigations on the nicotinic acetylcholine receptor structure in the neonicotinoid-bound state revealed a unique niche beyond the nitro oxygen tip toward the loop D subsite.
Motohiro, Tomizawa, Shinzo, Kagabu, John E, Casida   +2 more
openaire   +2 more sources

Die Neonicotinoide. Nicotin und die Neonicotinoide – Teil 2

Chemie in unserer Zeit, 2008
AbstractDie cholinerge Synapse ist ein attraktives Angriffsziel einer Fülle hochselektiver Insektizide. Nicotin und die Neonicotinoide wirken an dem postsynaptischen nicotinergen Acetylcholin‐Rezeptor. Die Neonicotinoide sind nicht das Ergebnis einer stringenten Weiterentwicklung der Naturstoffe Nicotin und Epibatidin, sondern leiten sich von den ...
openaire   +1 more source

Neonicotinoid Insecticides

2010
The use ofneonicotinoid insecticides has grown considerably since their introduction in 1990s. They are used extensively for the control of agriculturally important crop pests and also in the control of cat and dog fleas. Imidacloprid exploited through an elaborated structural and substituent optimization of nithiazine was launched to market in 1990 ...
openaire   +4 more sources

Neonicotinoids Disrupt Pollination

Chemical & Engineering News Archive, 2015
Neonicotinoid pesticides have been blamed for declines in bee populations worldwide. The chemicals don’t kill bees, instead neonicotinoids impair the insects’ abilities to learn, navigate, forage for nectar, and reproduce, according to studies published over the past several years. Now, researchers report that bees exposed to the pesticides also become
openaire   +1 more source

Minnesota restricts neonicotinoids

C&EN Global Enterprise, 2016
Minnesota now has the toughest restrictions in the U.S. on the use of neonicotinoid pesticides. When imposing these controls, the state claimed that the chemicals “present toxicity concerns for hon...
openaire   +1 more source

Neonicotinoids and Nitrogenous Insecticides

1998
Nicotine has never achieved the prominence that the synthetic insecticides have attained due to its expensiveness, lack of commercially applicable synthesis, extreme toxicity to mammals, and limited insecticidal spectrum. The mode of insecticidal action of nicotine was clarified by Yamamoto (Yamamoto et al.
A. S. Perry, I. Yamamoto, I. Ishaaya, R. Perry   +3 more
openaire   +1 more source

The Neonicotinoid Insecticides

2002
The neonicotinoid insecticides are a new generation of chemical agents that have recently been developed for commercial use. Their history can be traced to the late 1970s, when chemists at Shell Chemical Company investigated the heterocyclic nitromethylenes as potential insecticides (1,2).
openaire   +1 more source

The trouble with neonicotinoids

Science, 2014
Chronic exposure to widely used insecticides kills bees and many other ...
openaire   +1 more source