Results 71 to 80 of about 230,688 (310)

Insecticide control in a Dengue epidemics model [PDF]

open access: yes, 2010
A model for the transmission of dengue disease is presented. It consists of eight mutually-exclusive compartments representing the human and vector dynamics. It also includes a control parameter (insecticide) in order to fight the mosquitoes.
Monteiro, M. Teresa T.   +2 more
core   +2 more sources

Innovative electrospun geopolymer/zeolite/PVA composite membranes

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
Proposed scheme of gas adsorption mechanisms on electrospun geopolymer/zeolite/PVA composite membranes. Abstract Innovative electrospun poly(vinyl alcohol) (PVA)–geopolymer–zeolite 13X composite membranes were successfully fabricated and systematically characterized.
Mariana Schneider   +7 more
wiley   +1 more source

Insecticide Susceptibility Status of Aedes albopictus in Dengue Hotspot Areas in Malaysia

open access: yesASM Science Journal, 2021
The vector control program has become challenging due to the resistance problem occurs in Aedes mosquitoes. Aedes albopictus (Skuse, 1894) is the most dominant species contributing as a vector of dengue, Chikungunya and Zika viruses in Malaysia ...
WAN FATMA ZUHARAH   +5 more
doaj   +1 more source

Population management of cone and seed insects in spruce seed orchards [PDF]

open access: yes, 2011
Seed orchards have been established in order to produce high quality seeds for reforestation and forestation. However, seed production in spruce (Picea abies (L.) Karst.) seed orchards is severely hampered by cone- and seed-feeding insects.
Rosenberg, Olle
core  

Insecticide ear tags numerically improve grazing cattle performance [PDF]

open access: yes, 2013
Stocker cattle grazing pastures during the summer months face challenges due to horn flies, which can result in reduced weight gains and less efficient use of forages. One strategy for controlling horn flies is insecticide-impregnated ear tags. The use
Blasi, Dale A.   +4 more
core   +3 more sources

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

open access: yesThe 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   +6 more
wiley   +1 more source

Long-lasting insecticide-treated net usage in eastern Sierra Leone - the success of free distribution. [PDF]

open access: yes, 2010
Summary Objective Médecins Sans Frontières (MSF) runs a malaria control project in Bo and Pujehun districts (population 158 000) that includes the mass distribution, routine delivery and demonstration of correct use of free, long-lasting insecticide ...
Baker, Samuel   +6 more
core   +2 more sources

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

open access: yesENERGY &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   +7 more
wiley   +1 more source

Impact of human activities on the dynamics of insecticide resistance in Anopheles gambiae: Case of Benin (West Africa) [PDF]

open access: yes, 2010
Vector control for malaria prevention remains mainly based on the use of Long Lasting Insecticide Nets (LLINs) and Indoor Residual Spraying (IRS) in Sub-Saharan Africa.
Akogbeto, Martin   +4 more
core  

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

open access: yesEuropean 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   +4 more
wiley   +1 more source

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