Results 121 to 130 of about 68,018 (362)

Orientation of \u3ci\u3eHylobius Pales\u3c/i\u3e and \u3ci\u3ePachylobius Picivorus\u3c/i\u3e (Coleoptera: Curculionidae) to Visual Cues [PDF]

, 2017
Pitfall traps with above-ground silhouettes of various colors and diameters were used in field tests to evaluate the role of vision in host orientation by adult pales weevils, Hylobius pales, and pitch-eating weevils, Pachylobius picivorus.
Hunt, D.W. A, Raffa, K. F
core   +2 more sources

Typical Monoterpenes as Insecticides and Repellents against Stored Grain Pests

Molecules, 2016
Five monoterpenes naturally occurring in essential oils were tested for their insecticidal and repellent activities against the bruchid beetle Callosobruchus maculatus and the maize weevil Sitophilus zeamais.
Suelen L. Reis, A. G. Mantello, Jeferson M. Macedo, É. A. Gelfuso, Cássio P. da Silva, A. Fachin, A. Cardoso, R. O. Beleboni   +7 more
semanticscholar   +1 more source

Influence of the Substitution Pattern of Terpene‐Based Seven‐Membered Lactones on Yttrium‐Mediated Ring‐Opening Polymerization: A Kinetic and Mechanistic Investigation

Chemistry – A European Journal, EarlyView.
(‐)‐Menthide and trans (+)‐carvomenthide, differing only in substitution pattern, were polymerized via ROP using a bis(phenolate) yttrium catalyst. Kinetic studies showed faster polymerization of (+)‐carvomenthide but greater control with (‐)‐menthide. Experimental and DFT analyses revealed mechanistic differences in chain propagation, highlighting how
Lea‐Sophie Hornberger, Svenja Hiotidis, Shailja Jain, Michael Benz, Hugo Montan, Deven P. Estes, Johannes Kästner, Friederike Adams   +7 more
wiley   +1 more source

Seasonal influence on the essential oil chemical composition of Hyptis crenata Pohl ex Benth.: a valuable plant from Marajó, Brazil

Frontiers in Chemistry
Introduction: Essential oils (EOs) from the Hyptis genus have been reported as bactericides and fungicides. However, the properties of these oils can be affected by climatic factors, as well as the collection period, which promotes changes in the ...
Maria Nancy Norat de Lima, Maria Nancy Norat de Lima, Paulo Vinicius Lima Santos, Paulo Vinicius Lima Santos, Lucas Botelho Jerônimo, Lucas Botelho Jerônimo, Rian Martins Viana, Joyce Kelly da Silva, William N. Setzer, José Guilherme S. Maia, José Guilherme S. Maia, Pablo Luis B. Figueiredo, Pablo Luis B. Figueiredo   +12 more
doaj   +1 more source

Optimization of a new extraction technique for analysis of verbenone and cis-verbenol in pine seeds [PDF]

, 2007
Results from a systematic study of the factors affecting extraction of cis-verbenol and verbenone from pine seeds are presented. Five extraction conditions were investigated: extraction solvent, method of extraction, extraction temperature, volume of ...
Fernández Barbero, Gerardo, García Barroso, Carmelo, Liazid, Ali, Palma Lovillo, Miguel   +3 more
core   +2 more sources

Titanium cis‐DACH Salan Catalyst for the Efficient Epoxidation of Nonactivated Olefins with Hydrogen Peroxide‐Terminal‐Selective Epoxidation of Multiply Unsaturated Terpenes

Chemistry – A European Journal, EarlyView.
Terminal‐selective epoxidation–catalytic, simple, and with H2O2 as oxidant. The titanium complex of a new type of salan ligand, accessible in one step from cis‐DACH and 3‐(pentafluorophenyl)salicylic aldehyde, is an efficient catalyst for the epoxidation of nonconjugated olefins with H2O2.
Christina Wartmann, Jörg.‐M. Neudörfl, Albrecht Berkessel   +2 more
wiley   +1 more source

From Leaves to Reproductive Organs: Chemodiversity and Chemophenetics of Essential Oils as Important Tools to Evaluate Piper mollicomum Kunth Chemical Ecology Relevance in the Neotropics

Plants
Piper mollicomum Kunth (Piperaceae) plays a vital role in the preservation of the Brazilian Atlantic Forest by contributing to the regeneration of deforested areas.
Daniel de Brito Machado, Jéssica Sales Felisberto, George Azevedo de Queiroz, Elsie Franklin Guimarães, Ygor Jessé Ramos, Davyson de Lima Moreira   +5 more
doaj   +1 more source

Influence of Humidity, Temperature and Radicals on the Formation and Thermal Properties of Secondary Organic Aerosol (SOA) from Ozonolysis of {\beta}-pinene

, 2013
The influence of water and radicals on SOAs produced by {\beta}-pinene ozonolysis was investigated at 298 and 288 K using a laminar flow reactor. A volatility tandem differential mobility analyzer (VTDMA) was used to measure the evaporation of the SOA ...
Emanuelsson, Eva U., Hallquist, Mattias, Ljungström, Evert, Lutz, Anna, Watne, Ågot K.   +4 more
core   +1 more source

A method to detect baseline emission and plant damage induced volatile emission in a greenhouse [PDF]

, 2008
The objective of this research was to ascertain if 1) baseline emission and 2) damage induced emission of volatile plant substances could be detected under greenhouse conditions.
Bouwmeester, H.J., Henten, E., van, Hofstee, J.W., Jansen, R., Posthumus, M., Verstappen, F.W.A.   +5 more
core   +2 more sources

En Route Toward Sustainable Polycarbonates via Large Cyclic Carbonates

ChemSusChem, EarlyView.
The use of safe carbonylating agents, allowed by a suitable (bio)catalytic systems, affords the sustainable and green synthesis of large‐ring cyclic carbonates by reaction of renewables such as bio‐based diols. These carbonates are prone to ring‐opening polymerization paving the way for the production of circular aliphatic polycarbonates.
Francesco Della Monica, Arianna Brandolese, Graziano Di Carmine, Maurizio Selva, Giulia Fiorani, Lorella Izzo   +5 more
wiley   +1 more source