Results 71 to 80 of about 405,960 (378)

Identification and quantification of cannabinol as a biomarker for local hemp retting in an ancient sedimentary record by HPTLC-ESI-MS [PDF]

open access: yes, 2020
Cannabis products have been used in various fields of everyday life for many centuries, and applications in folk medicine and textile production have been well-known for many centuries.
Csuk, René   +6 more
core   +2 more sources

Unsupervised Hierarchical Symbolic Regression for Interpretable Property Modeling in Complex Multi‐Variable Systems

open access: yesAdvanced Science, EarlyView.
UHSR translates complex chemical behavior into clear and explainable equations. Applied to thin‐layer chromatography, it automatically uncovers the mathematical rules linking a molecule's structure to its polarity. This approach matches the accuracy of advanced AI while providing interpretable results, earning greater trust from chemists. The method is
Siyu Lou   +4 more
wiley   +1 more source

TLC densitometric method for screening of lycopsamine in comfrey root (Symphytum officinale L.) extracts using retrorsine as a reference compound

open access: yesActa Pharmaceutica, 2014
Due to severe toxicity of pyrrolizidine alkaloids, their quantification in medicinal products is very important. The idea of this research was to use retrorsine as a surrogate reference compound instead of lycopsamine reference or lycopsamine isolated ...
Janeš Damjan, Kreft Samo
doaj   +1 more source

INCIDENCIA DEL TLC COLOMBIA-ESTADOS UNIDOS EN LAS PYMES CON VOCACIÓN EXPORTADORA

open access: yesDictamen Libre, 2015
This article aims to present the impact of the Free Trade Agreements in force in 2013 between Colombia and the United States of America, US, Colombian export-oriented SMEs.
Víctor S. Márceles Guerrero
doaj   +1 more source

Mineral nutrition and its genetic signature in oil palm (Elaeis guineensis Jacq.): A possible panorama for high yielding materials at low fertiliser cost [PDF]

open access: yes, 2010
Significant differences in the mineral nutrition have been demonstrated between progenies and the main categories at PT Socfindo (Jacquemard et al, 2002). A new set of investigations has been conducted based on a larger genetic background.
Jacquemard, Jean-Charles   +4 more
core  

Metabolism of amino acid amides in Pseudomonas putida ATCC 12633 [PDF]

open access: yes, 1993
The metabolism of the natural amino acid L-valine, the unnatural amino acids D-valine, and D-, L-phenylglycine (D-, L-PG), and the unnatural amino acid amides D-, L-phenylglycine amide (D, L-PG-NH2) and L-valine amide (L-Val-NH2) was studied in ...
Croes, L.M.,   +4 more
core   +1 more source

Fluorinated Hypoxia‐Responsive Aza‐BODIPY for NIR‐II FL/19F MR/PA Imaging and Phototherapy of Lung Cancer

open access: yesAdvanced Science, EarlyView.
Fluorinated N‐oxide aza‐BODIPY nanoemulsions integrate fluorination‐driven molecular design with co‐assembly in fluorinated oil for multimodal imaging‐guided phototherapy. The co‐assembly redshifts fluorescence into the NIR‐II window for deep‐tissue imaging and provides a unified 19F signal for background‐free, quantitative MRI.
Anfeng Li   +5 more
wiley   +1 more source

El TLC Perú - China: Posibles implicancias para el Perú

open access: yesPensamiento Crítico, 2010
El documento analiza el Tratado de Libre Comercio (TLC) entre Perú y China suscrito en Pekín el 28 de abril de 2009, y ratificado por el Perú el 6 de diciembre de ese mismo año.
Víctor Torres Cuzcano
doaj   +1 more source

Intereses colombianos en el TLC [PDF]

open access: yesRevista de Estudios Sociales, 2006
1. Teniendo en cuenta los resultados de las negociaciones del TLC, ?cuales cree que son los aspectos mas sobresalientes a favor y en contra de los intereses patrios, en el sector de la economia? Como los resultados de la negociacion todavia no se conocen a cabalidad, quisiera, en lugar de incurrir en una contabilidad detallada de ganadores y perdedores,
Gaviria, Alejandro   +3 more
openaire   +3 more sources

6-Deoxyhexoses froml-Rhamnose in the Search for Inducers of the Rhamnose Operon: Synergy of Chemistry and Biotechnology [PDF]

open access: yes, 2016
In the search for alternative non‐metabolizable inducers in the l ‐rhamnose promoter system, the synthesis of fifteen 6‐deoxyhexoses from l ‐rhamnose demonstrates the value of synergy between biotechnology and chemistry.
Estévez, Amalia   +12 more
core   +3 more sources

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