Results 61 to 70 of about 65,330 (195)

INHIBITION OF SPINACH CHLOROPLAST PHOTOPHOSPHORYLATION AND ELECTRON TRANSPORT BY SELECTED NATURAL PRODUCTS [PDF]

open access: yesJournal of Plant Protection and Pathology, 2006
The effects of the biflavonoid crassifolin (1), the flavonoid tephrobotin, the Annnonaceous acetogenins squamocin (3), and buliatacin (4) were investigated on different photosynthetic activities in isolated spinach chloroplasts.
Shafika EI-Kassabany,
doaj   +1 more source

Crystal structure of fucoxanthin: resolving a long‐standing crystallographic challenge

open access: yesActa Crystallographica Section C, EarlyView.
The first small‐molecule single‐crystal X‐ray structure of fucoxanthin is reported, resolving a long‐standing crystallographic problem in carotenoid structural chemistry.Fucoxanthin (C42H58O6) is a highly functionalized allenic epoxy xanthophyll containing hydroxy, acetoxy, ketone and conjugated polyene units.
Yui Wakasa, Mao Minoura
wiley   +1 more source

Design, Synthesis and Biological Evaluation of Benzohydrazide Derivatives Containing Dihydropyrazoles as Potential EGFR Kinase Inhibitors

open access: yesMolecules, 2016
A series of novel benzohydrazide derivatives containing dihydropyrazoles have been synthesized as potential epidermal growth factor receptor (EGFR) kinase inhibitors and their biological activities as potential antiproliferative agents have been ...
Hai-Chao Wang   +5 more
doaj   +1 more source

The oxygen and pressure physiology of upper elevational range limits in insects

open access: yesFunctional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Climate warming is widely expected to cause montane insects to shift upslope, and there is good evidence that some populations are doing so. Nevertheless, patterns are mixed—with evidence supporting upslope, downslope or even no movement of both lower and upper range ...
H. Arthur Woods   +2 more
wiley   +1 more source

Pteridines, LXXXVIII. Oxidations and Reactions of 2- and 4-Thiolumazine Derivatives. Synthesis and Properties of Pteridine-Sulfinates and -sulfonates

open access: yesPteridines, 1989
Selective oxidations of 2-thiolumazines (10-12) by H20 2 and KMn04 respectively in basic medium led to the corresponding stable pteridin-4-one-2-sulfinates (13-15) and -sulfonates (16-18), which can be isolated in the form of their potassium salts.
Bartke Michael, Pfleiderer Wolfgang
doaj   +1 more source

Refining the Vertebrate Mitochondrial 12S rRNA Secondary Structure by Comparative Analysis

open access: yesIntegrative Zoology, EarlyView.
This flowchart outlines the comprehensive workflow of the study, integrating diverse bioinformatics tools (e.g., NCBI2GO, SSU‐align, bpRNA) and their sequential interactions. Key steps, such as data preprocessing, structural prediction, and evolutionary analysis, are depicted with their respective outputs (e.g., standardized records, consensus ...
Fengxia Li   +6 more
wiley   +1 more source

Growth of β-LiNaSO4 and Li2SO4 . H20: epitaxy and intergrowth phenomena

open access: yes, 1995
Isothermal crystallization in the system Na2SO4-Li2SO4-H20 was carried out at 50°C by "salting out" in a tetrametoxysilane (TMS) gel medium. Under these conditions the solid phases that can crystallize are Na2SO4, Li2SO4 . H20 and β-LiNaSO4, depending on
López García, José Ángel   +3 more
core   +1 more source

Determinantes del apoyo social a aumentar e introducir nuevos impuestos para grupos de altos ingresos en México*

open access: yesEl Trimestre Económico
Los impuestos cumplen un papel importante en el financiamiento de las políticas de desarrollo y en la corrección de las desigualdades de ingresos. En este artículo investigamos las razones que llevan a los mexicanos a querer aumentar o introducir nuevos ...
Raymundo M. Campos-Vazquez   +3 more
doaj   +1 more source

Factors Associated With Long‐Term Survivors With Epidermal Growth Factor Receptor Positive Non‐Small Cell Lung Cancer Treated With First or Second‐Generation Tyrosine Kinase Inhibitors: A Canadian Multi‐Center Cohort

open access: yesAsia-Pacific Journal of Clinical Oncology, EarlyView.
In a multi‐center Canadian cohort of 577 patients with advanced epidermal growth factor receptor‐mutated non‐small cell lung cancer treated with first/second‐generation TKIs, Asian ancestry and female sex predicted longer survival, while the L858R mutation predicted shorter survival.
Heather Halperin   +10 more
wiley   +1 more source

Superação da dormência de sementes de carrapicho-beiço-de-boi Dormancy overcoming in Desmodium tortuosum seeds

open access: yesPlanta Daninha, 1997
Visando a obtenção de um tratamento para acelerar a germinação de sementes de Desmodium tortuosum (Sw.) DC., foram realizados dois experimentos, nos quais, segmentos unisseminados de lomentos (testemunha) foram submetidos a debulha manual; debulha manual
Cibele C. Martins   +3 more
doaj   +1 more source

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