Results 11 to 20 of about 27,501 (201)

Safety and efficacy of a feed additive consisting of lactic acid produced by Weizmannia coagulans (synonym Bacillus coagulans) DSM 32789 for all animal species except for fish (Jungbunzlauer SA). [PDF]

open access: yesEFSA J, 2022
Abstract Following a request from the European Commission, the Panel on Additives and Products or Substances used in Animal Feed (FEEDAP) was asked to deliver a scientific opinion on the safety and efficacy of lactic acid produced by a non‐genetically modified strain of Weizmannia coagulans (synonym of Bacillus coagulans) (DSM 32789) for all animal ...
EFSA Panel on Additives and Products or Substances used in Animal Feed (FEEDAP)   +23 more
europepmc   +2 more sources

Contact chemoreceptive mate recognition in Cerambyx welensii Küster (Coleoptera: Cerambycidae) Mediación de la quimiorrecepción por contacto en el apareamiento en Cerambyx welensii Küster (Coleoptera: Cerambycidae)

open access: yesAgricultural and Forest Entomology, Volume 25, Issue 4, Page 622-636, November 2023., 2023
Abstract Cerambyx welensii Küster (Coleoptera: Cerambycidae) is a wood‐borer responsible for the decline of Mediterranean oaks in open woodlands. To establish that contact pheromones are involved in mate recognition of C. welensii, we extracted the cuticular hydrocarbons by solid phase microextraction at pre‐reproductive, beginning and ending of the ...
Israel Sánchez‐Osorio   +5 more
wiley   +1 more source

Seal materials in flexible plastic food packaging: A review

open access: yesPackaging Technology and Science, Volume 36, Issue 7, Page 507-532, July 2023., 2023
This review on heat seal materials aims to give a literature overview to optimize the material selection in flexible food packaging and obtain seals with desired tightness and strength. The simplified representation of temperature dependence of hot tack and seal strengths of thermoplastic films shows low values below seal initiation temperature (A ...
Bram Bamps, Mieke Buntinx, Roos Peeters
wiley   +1 more source

Efficient Asymmetric Synthesis of an A‐Ring Synthon for Pd‐Catalyzed Preparation of 1α‐Hydroxyvitamin D Metabolites and Analogs

open access: yesEuropean Journal of Organic Chemistry, Volume 2022, Issue 33, September 6, 2022., 2022
An efficient Lewis acid‐assisted asymmetric carbonyl‐ene reaction to set the 1α‐hydroxyl functionality of enol‐triflate, precursor of the A‐ring of the hormone calcitriol and its 1α‐hydroxyderivatives, is described. Abstract The secondary parallel hypercalcemic effects associated with the treatment of several hyperproliferative diseases with the ...
Julian Loureiro   +2 more
wiley   +1 more source

Solution‐Based Synthesis Routes for the Preparation of Noncentrosymmetric 0‐D Oxide Nanocrystals with Perovskite and Nonperovskite Structures

open access: yesSmall, Volume 18, Issue 30, July 27, 2022., 2022
Solution‐based methods are reviewed for the preparation of representative, multifunctional noncentrosymmetric oxide nanocrystals with perovskite and nonperovskite crystalline structures. Elucidation of the reaction pathways and crystallization mechanisms is a prerequisite for improving their resulting morphology in the future and aggregation state for ...
Géraldine Dantelle   +5 more
wiley   +1 more source

Free‐Radical Epimerization of d‐ into l‐C‐(Glycosyl)methanol Compounds Using 1,5‐Hydrogen Atom Transfer Reaction

open access: yesEuropean Journal of Organic Chemistry, Volume 2022, Issue 16, April 27, 2022., 2022
The preparation of enantiomerically pure cis‐C‐glycosyl compounds, through a long‐range epimerization at C5 of readily accessible d‐ or l‐carbohydrates, by means of a remote reductive radical sequence was described. A comparative study of the radical process promoted by a tin reagent or with photoredox conditions was also performed.
Adrián S. Montes   +4 more
wiley   +1 more source

Asymmetric Mass Transport through Dense Heterogeneous Polymer Membranes: Fundamental Principles, Lessons from Nature, and Artificial Systems

open access: yesMacromolecular Rapid Communications, Volume 43, Issue 3, February 2022., 2022
Directional mass transport through asymmetric membrane architectures is attracting growing interest. The principles behind asymmetric transversal mass transport through dense membranes are summarized, and the structural prerequisites to achieve directional transport are provided.
Aristotelis Kamtsikakis, Christoph Weder
wiley   +1 more source

Photoswitchable Norbornadiene–Quadricyclane Interconversion Mediated by Covalently Linked C60

open access: yesChemistry – A European Journal, Volume 26, Issue 23, Page 5220-5230, April 21, 2020., 2020
Switching! The synthesis of several norbornadiene (NBD)–fullerene adducts is herein reported. Within these new hybrid systems, the photochemical isomerization of NBD is combined with the electron affinity of C60. This enables the selective light‐induced isomerization of the NBD derivative to its corresponding quadricyclane (QC) counterpart and the back
Patrick Lorenz, Andreas Hirsch
wiley   +1 more source

Genomics analysis of hexanoic acid exposure in Drosophila species [PDF]

open access: yesG3 Genes|Genomes|Genetics, 2021
Abstract Drosophila sechellia is a dietary specialist endemic to the Seychelles islands that has evolved to consume the fruit of Morinda citrifolia. When ripe, the fruit of M. citrifolia contains octanoic acid and hexanoic acid, two medium-chain fatty acid volatiles that deter and are toxic to generalist insects.
Zachary A Drum   +26 more
openaire   +3 more sources

Comparative Morphological Study of Asphaltenes in Cuban Crude Using N-Pentane and N-Hexane as Precipitating Agent

open access: yesRevista Cubana de Ingeniería, 2015
The components of petroleum are grouped into four organic classes such as: Saturated, Aromatic,Resins and Asphaltenes. Asphaltenes are compounds with a complex structure and high molecularweight, made up by carbon rings linked to alkyl chains and ...
Doramis de la Caridad Vega Torres   +1 more
doaj   +1 more source

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