Results 61 to 70 of about 121,217 (306)

Monosubstituted N‐Arylhydroxylamine Chemistry: Integrating Contemporary Synthetic Approaches for the Efficient Construction of Diverse Heterocyclic Scaffolds

Chemistry – A European Journal, EarlyView.
Monosubstituted N‐arylhydroxylamines represent a unique subclass of hydroxylamines that act as pivotal intermediates in redox transformations and as versatile platforms for further synthetic transformations. They serve as key building blocks in the synthesis of architecturally complex heterocycles and other valuable organic compounds.
Michael G. Kallitsakis, Kyriakos D. Nikopoulos, Ioannis N. Lykakis   +2 more
wiley   +1 more source

Bio-efficacy of selected long-lasting insecticidal nets against pyrethroid resistant Anopheles arabiensis from South-Western Ethiopia. [PDF]

, 2012
The emergence and spread of insecticide resistance in the major African malaria vectors Anopheles gambiae s.s. and Anopheles arabiensis may compromise control initiatives based on insecticide-treated nets (ITNs) or indoor residual spraying (IRS), and ...
Asale, Abebe, Duchateau, Luc, Getachew, Yehenew, Speybroeck, Niko, Tushune, Kora, Yewhalaw, Delenasaw   +5 more
core   +3 more sources

Farmers' knowledge and management practices of the fall armyworm (Spodoptera frugiperda Smith) in Burkina Faso

Biotechnologie, Agronomie, Société et Environnement, 2022
Description of the subject. The fall armyworm Spodoptera frugiperda Smith has recently invaded sub-Saharan African countries where it causes significant losses to maize since 2016. Objectives.
Besmer Régis Ahissou, Wendnéyidé Mathieu Sawadogo, Aimé H. Bokonon-Gant, Irénée Somda, François Verheggen   +4 more
doaj   +1 more source

Perceived importance and didactic difficulty of chemistry education: Insights from Czech teachers

The Curriculum Journal, EarlyView.
Abstract This empirical study examines how chemistry teachers in lower and upper secondary schools in the Czech Republic evaluate the content of the chemistry curriculum, focussing on its perceived importance and didactic difficulty. Based on a quantitative survey (N = 146), the study provides insight into the pedagogical content knowledge of ...
Jitka Lorenzová, Blanka Jirkovská, Martin Čapek Adamec, Jan Havlík, Petr Holzhauser, Daniela Nováková, Karel Němejc   +6 more
wiley   +1 more source

Naturally Occurring Compounds/Materials as Alternatives to Synthetic Chemical Insecticides for Use in Fire Ant Management

Insects, 2020
The invasive red imported fire ant, Solenopsis invicta Buren (hereafter, fire ants), is a significant threat to public health and a danger to livestock, pets and wildlife due to their venomous stings.
Jian Chen, David H. Oi
doaj   +1 more source

Nanofiber PVA‐Based Membranes Incorporating Functionalized Spanish Broom Derivatives for Sustainable Water Purification

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
This study investigates Spanish broom (Spartium junceum) as a renewable source for electrospun composite membranes in sustainable water purification. MCC and biochar were functionalized with eco‐friendly precursors and nanomaterials (i.e., HNT, β‐CDs) to develop hybrid PVA nanofiber composites.
Giulia Rando, Silvia Sfameni, Jozefien Geltmeyer, Alessandra Palella, Lorenzo Spadaro, Alberto Riminucci, Karen De Clerck, Maria Rosaria Plutino   +7 more
wiley   +1 more source

Integrated Management of European Cherry Fruit Fly Rhagoletis cerasi (L.): Situation in Switzerland and Europe [PDF]

, 2012
: The European cherry fruit fly, Rhagoletis cerasi (L.) (Diptera: Tephritidae), is a highly destructive pest. The low tolerance for damaged fruit requires preventive insecticide treatments for a marketable crop.
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core   +2 more sources

Failure control of Plutella xylostella (Lepidoptera: Plutellidae) and selectivity of their natural enemies to different insecticides

Journal of Plant Protection Research, 2018
Control failure of pests and selectivity of insecticides to beneficial arthropods are key data for the implementation of Integrated Pest Management (IPM) programs.
Leandro Bacci, Jander Fagundes Rosado, Marcelo Coutinho Picanço, Alfredo Henrique Rocha Gonring, Tarcísio Visintin da Silva Galdino, Júlio Cláudio Martins   +5 more
doaj   +1 more source

Ecological engineering in cauliflower for aphid management

The Indian Journal of Agricultural Sciences, 2020
Because of high-value, the crops like Brassica have very low pest-damage thresholds, natural enemies alone are unlikely to replace use of high cost insecticides.
M C Keerthi, R K Sharma, Sachin S Suroshe, S R Sinha   +3 more
doaj   +1 more source

Total Synthesis of rac‐Keramamine C Enabled by Intrinsic H‐Bond‐Induced Conformational Fixation of Amides

European Journal of Organic Chemistry, EarlyView.
The total synthesis of the manzamine alkaloid keramamine C (2) in its racemic form was achieved in 5 steps, with ring‐closing metathesis as the key step. The metathesis is strongly improved by an intramolecular H‐bond‐induced conformational fixation of the amide bond, inducing close proximity of the terminal double bonds in the precursor molecule.
Jana Ganzmann, Ryan Thurston, Pascal Riester, Nina Hegmann, Markus R. Heinrich   +4 more
wiley   +1 more source