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21.
The extraction of yellow gentian root (Gentiana lutea L .) 总被引:1,自引:0,他引:1
Amaia Ariño Inés Arberas M. Jesús Leiton Mertxe de Renobales Juan B. Dominguez 《European Food Research and Technology》1997,205(4):295-299
Several solvents have been investigated for the preparation of bitter compounds of gentian roots (Gentiana lutea L.) for food applications. The highest concentrations of the bitter compounds, amarogentin and gentiopicroside, were obtained
with ethanol : water 55 : 45 (v/v), propylene glycol: water 30 : 70 (v/v) and ethanol: propylene glycol: water 20 : 20 : 60
(v/v/v). Enzyme treatment prior to solvent extraction gave a greater extract yield (3.5%) but the amarogentin and gentiopicroside
concentrations remained the same. The volatile fraction was affected by the solvent used through the formation of esters of
organic acids from the plant.
Received: 22 January 1997 / Revised version: 18 March 1997 相似文献
22.
JL Molinuevo F Graus C Serrano R Re?e A Guerrero I Illa 《Canadian Metallurgical Quarterly》1998,44(6):976-980
Anti-Hu antibodies (Hu-Abs) were positive in 40 patients with paraneoplastic sensory neuropathy (PSN) and in 1 patient with idiopathic sensory neuropathy in a series of 126 patients who presented with clinical features suggestive of PSN. The specificity of Hu-Abs was 99% and the sensitivity was 82%. Nine (18%) PSN patients were Hu-Ab-negative, and their sera did not harbor other specific anti-neuronal or anti-ganglioside antibodies. Small cell lung carcinoma (SCLC) was the leading neoplasm in the Hu-Ab-positive (79%) and Hu-Ab-negative (44%) groups. This study confirms the value of Hu-Abs for the diagnosis of PSN and SCLC and also emphasizes that in patients with possible PSN, the absence of Hu-Abs does not exclude cancer, particularly in those patients with risk factors for SCLC. 相似文献
23.
We synthesized and characterized new neutral and cationic palladium(II) complexes containing bis-(thio)ether ligands. The cationic compounds catalyzed the alternating CO/tert-butylstyrene copolymerization leading to polyketones with different degrees of stereoregularity depending on the nature of the S-S ligand. 相似文献
24.
Annualizing working hours (AH) is a means of achieving flexibility in the use of human resources to cope with the seasonal nature of demand. Some existing planning procedures are able to minimize costs through the use of overtime and temporary workers. However, due to the great difficulty in solving the problem, it is normally assumed both that holiday weeks are fixed beforehand and that workers from different categories who are able to perform a specific type of task have the same efficiency. Often the reality is different, and thus there is a gap between academic and real problems. In the present paper, those constraints are relaxed and a much more general and true-to-life problem is solved in an exact and very efficient way. 相似文献
25.
Galectin‐3‐Binding Glycomimetics that Strongly Reduce Bleomycin‐Induced Lung Fibrosis and Modulate Intracellular Glycan Recognition
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Dr. Tamara Delaine Dr. Patrick Collins Dr. Alison MacKinnon Dr. G. Sharma John Stegmayr Dr. Vishal K. Rajput Dr. Santanu Mandal Dr. Ian Cumpstey Dr. Amaia Larumbe Dr. Bader A. Salameh Barbro Kahl‐Knutsson Dr. Hilde van Hattum Dr. Monique van Scherpenzeel Prof. Roland J. Pieters Prof. Tariq Sethi Dr. Hans Schambye Prof. Stina Oredsson Prof. Hakon Leffler Assoc. Prof. Helen Blanchard Prof. Ulf J. Nilsson 《Chembiochem : a European journal of chemical biology》2016,17(18):1759-1770
Discovery of glycan‐competitive galectin‐3‐binding compounds that attenuate lung fibrosis in a murine model and that block intracellular galectin‐3 accumulation at damaged vesicles, hence revealing galectin‐3–glycan interactions involved in fibrosis progression and in intracellular galectin‐3 activities, is reported. 3,3′‐Bis‐(4‐aryltriazol‐1‐yl)thiodigalactosides were synthesized and evaluated as antagonists of galectin‐1, ‐2, ‐3, and ‐4 N‐terminal, ‐4 C‐terminal, ‐7 and ‐8 N‐terminal, ‐9 N‐terminal, and ‐9 C‐terminal domains. Compounds displaying low‐nanomolar affinities for galectins‐1 and ‐3 were identified in a competitive fluorescence anisotropy assay. X‐ray structural analysis of selected compounds in complex with galectin‐3, together with galectin‐3 mutant binding experiments, revealed that both the aryltriazolyl moieties and fluoro substituents on the compounds are involved in key interactions responsible for exceptional affinities towards galectin‐3. The most potent galectin‐3 antagonist was demonstrated to act in an assay monitoring galectin‐3 accumulation upon amitriptyline‐induced vesicle damage, visualizing a biochemically/medically relevant intracellular lectin–carbohydrate binding event and that it can be blocked by a small molecule. The same antagonist administered intratracheally attenuated bleomycin‐induced pulmonary fibrosis in a mouse model with a dose/response profile comparing favorably with that of oral administration of the marketed antifibrotic compound pirfenidone. 相似文献
26.
Amaia González-Salgado Teresa González-Jaén Covadonga Vázquez 《Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment》2013,30(6):758-764
Aspergillus flavus is frequently found in food, producing a wide variety of toxins, aflatoxins being the most relevant in food safety. A specific PCR-based protocol for this species is described which allowed discrimination from other closely related species having different profiles of secondary metabolites from the Aspergillus Section Flavi, particularly A. parasiticus. The specific primers were designed on the multi-copy internal transcribed region of the rDNA unit (ITS1-5.8S-ITS2 rDNA) and were tested in a wide sample of related species and other fungal species commonly found in food. The PCR assay was coupled with a fungal enrichment and a DNA extraction method for wheat flour to enhance the sensitivity of the diagnostic protocol. The results indicated that the critical PCR amplification product was clearly observed for wheat flour contaminated by 102 spores after 16 h of incubation. 相似文献
27.
Determination of oleanolic acid in human plasma and its association with olive oil intake in healthy Spanish adults within the EPIC Spain cohort study
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Genevieve Buckland Antoni Pastor Leila Lujan‐Barroso Carlos Alberto Gonzalez Noemie Travier Pilar Amiano José María Huerta Antonio Agudo Carmen Navarro María Dolores Chirlaque Maria‐José Sánchez Miguel Rodríguez‐Barranco Aurelio Barricarte Eva Ardanaz Miren Dorronsoro Amaia Molinuevo José Ramón Quirós Rafael de la Torre 《Molecular nutrition & food research》2017,61(8)
28.
Strongly Anisotropic Thermal Conductivity of Free‐Standing Reduced Graphene Oxide Films Annealed at High Temperature
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Jackie D. Renteria Sylvester Ramirez Hoda Malekpour Beatriz Alonso Alba Centeno Amaia Zurutuza Alexandr I. Cocemasov Denis L. Nika Alexander A. Balandin 《Advanced functional materials》2015,25(29):4664-4672
Thermal conductivity of free‐standing reduced graphene oxide films subjected to a high‐temperature treatment of up to 1000 °C is investigated. It is found that the high‐temperature annealing dramatically increases the in‐plane thermal conductivity, K, of the films from ≈3 to ≈61 W m?1 K?1 at room temperature. The cross‐plane thermal conductivity, K⊥, reveals an interesting opposite trend of decreasing to a very small value of ≈0.09 W m?1 K?1 in the reduced graphene oxide films annealed at 1000 °C. The obtained films demonstrate an exceptionally strong anisotropy of the thermal conductivity, K/K⊥ ≈ 675, which is substantially larger even than in the high‐quality graphite. The electrical resistivity of the annealed films reduces to 1–19 Ω □?1. The observed modifications of the in‐plane and cross‐plane thermal conductivity components resulting in an unusual K/K⊥ anisotropy are explained theoretically. The theoretical analysis suggests that K can reach as high as ≈500 W m?1 K?1 with the increase in the sp2 domain size and further reduction of the oxygen content. The strongly anisotropic heat conduction properties of these films can be useful for applications in thermal management. 相似文献
29.
Mattie Garaikoetxea Ernesto Martín-Núez Adela Navarro Lara Matilla Amaya Fernndez-Celis Vanessa Arrieta Amaia García-Pea Alicia Gainza Virginia lvarez Rafael Sdaba Eva Jover Natalia Lpez-Andrs 《International journal of molecular sciences》2022,23(15)
Aortic stenosis (AS) is a fibrocalcific disease of the aortic valves (AVs). Sex-differences in AS pathophysiology have recently been described. High levels of fatty acid-binding protein 4 (FAPB4) in atherosclerotic plaques have been associated with increased local inflammation, endothelial dysfunction, and plaque vulnerability. FABP4 pharmacological blockade has been shown to be effective for the treatment of atherosclerosis by modulating metabolic and inflammatory pathways. We aimed to analyze the sex-specific expression of FABP4 in AS and its potential role as a therapeutic target. A total of 226 patients (61.5% men) with severe AS undergoing surgical AV replacement were recruited. The FABP4 levels were increased in the AVs of AS patients compared to the control subjects, showing greater expression in the fibrocalcific regions. Male AVs exhibited higher levels of FABP4 compared to females, correlating with markers of inflammation (IL-6, Rantes), apoptosis (Bax, caspase-3, Bcl-2), and calcification (IL-8, BMP-2 and BMP-4). VICs derived from AS patients showed the basal expression of FABP4 in vitro. Osteogenic media induced upregulation of intracellular and secreted FABP4 levels in male VICs after 7 days, along with increased levels of inflammatory, pro-apoptotic, and osteogenic markers. Treatment with BMS309403, a specific inhibitor of FABP4, prevented from all of these changes. Thus, we propose FABP4 as a new sex-specific pharmacological therapeutic target in AS. 相似文献
30.
Derkacz Jan Leszczuk Mikołaj Grega Michał Koźbiał Arian Hernández Fernando Jorge Zorrilla Amaia Mendez García Zapirain Begoña Smaïli Kamel 《Multimedia Tools and Applications》2018,77(7):8359-8374
Multimedia Tools and Applications - In this paper, we will present a study concerning the understanding of the needs of people using Internet in order to access to multilingual information. In... 相似文献