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- 저자 : Alejandra Martinez (검색결과 3 건)
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Argemone species: Potential source of biofuel and high-value biological active compounds
Alejandra Anahi Martinez-Delga,Jose de Anda,Janet Maria Leon-Morales,Juan Carlos Mateos-Diaz,Antonia Gutierrez-Mora,Jose Juvencio Castaneda-Nava 대한환경공학회 2022 Environmental Engineering Research Vol.27 No.2
The Argemone genus includes weed species of great importance in traditional medicine due to biological activities attributed to secondary metabolites, mainly alkaloids, distributed in all tissues of this species. In addition, their seeds contain a large amount of oil (30 to 40%). For this reason, several authors have discussed the potential of this species as a non-edible source to produce multi-purpose raw materials and a low cost-crop for example in the production of biofuels such as biodiesel. Argemone species grows in poor soils with low water and nutrient requirements. This makes the Argemone species an attractive economical and environmentally friendly candidate for biofuels production. Furthermore, the Argemone species can also provide high-value by-products for the agrochemical and pharmaceutical industry. In this work, we compiled the ethnomedical information, biochemical features, and biofuel production efforts that have been published by testing different Argemone species, in order to compare the research efforts and analyze its biotechnological potential. After analyzing the literature, we conclude that the genus has great potential for high-value pharmaceutical products and energy production purposes, and also to control plant pests. We also consider that other species of the genus may have also potential applications in this field.
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Alejandra Mina Rosales,Elena Aznar,Carmen Coll,Ruben A. Garcia Mendoza,A. Lorena Urbano Bojorge,Nazario Felix Gonzalez,Ramon Martinez-Manez,Francisco del Pozo Guerrero,Jose Javier Serrano Olmedo 한국자기학회 2016 Journal of Magnetics Vol.21 No.3
Magnetic hyperthermia mediated by superparamagnetic particles is mainly based in sinusoidal waveforms as excitation signals. Temperature changes are conventionally explained by rotation of the particles in the surrounding medium. This is a hypothesis quite questionable since habitual experimental setups only produce changes in the magnetic module, not in the field lines trajectories. Theoretical results were tested by changing the waveform of the exciting signal in order to compare non-sinusoidal signals against sinusoidal signals. Experiments were done at different frequencies: 200 ㎑, 400 ㎑, 600 ㎑, 800 ㎑ and 1 ㎒. Superparamagnetic Iron Oxide samples (SPION), made of magnetite (Fe3O4) and suspended in water (100 ㎎/ml), were used. Magnetic field strength varies from 0.1 ± 0.015 KA/m to 0.6 ± 0.015 KA/m. In this study was observed that the power loss depends on the applied frequency: for 1 to 2.5 RMS current the responses for each signal are part of the higher section of the exponential function, and for 3.5 to 8 RMS current the response is clearly the decrement exponential function’s tale (under 1 × 10³ LER/gr).
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Manon Daix,Martina Aida Angeles,Federico Migliorelli,Athanasios Kakkos,Carlos Martinez Gomez,Katty Delbecque,Eliane Mery,Stéphanie Tock,Erwan Gabiache,Marjolein Decuypere,Frédéric Goffin,Alejandra Mar 대한부인종양학회 2021 Journal of Gynecologic Oncology Vol.32 No.4
Objective: To evaluate the concordance between preoperative European Society for Medical Oncology (ESMO)-European Society of Gynaecological Oncology (ESGO)-European SocieTy for Radiotherapy and Oncology (ESTRO) risk classification in early-stage endometrial cancer (EC) assessed by biopsy and magnetic resonance imaging (MRI) with this classification based on histology of surgical specimen. Methods: This bicentric retrospective study included women diagnosed with early-stage EC (≤stage II) who had a complete preoperative assessment and underwent a surgical management from January 2011 to December 2018. Patients were preoperatively classified into 3 degrees of risk of lymph node (LN) involvement based on biopsy and MRI. Based on final histological report, patients were re-classified using the preoperative classification. Concordance between the preoperative assessment and definitive histology was calculated with weighted Cohen's kappa coefficient. Results: A total of 333 women were included and kappa coefficient of preoperative risk classification was 0.49. The risk was underestimated and overestimated in 37% and 10% of cases, respectively. Twenty-nine percent of patients had an incomplete LN staging according to the degree of risk of re-classification. The observed discordance in the risk classification was attributed to MRI in 75% of cases, to biopsy in 18% and in 7% to both (p<0.001). Kappa coefficient for concordance was 0.25 for MRI and 0.73 for biopsy. Conclusion: Concordance between preoperative ESMO-ESGO-ESTRO risk classification and final histology is weak. Given that the risk was underestimated in the majority of patients wrongly classified, sentinel LN procedure instead of no LN dissection could be an option offered to preoperative low-risk patients to decrease the indication of second surgery for re- staging and/or to avoid toxicity of adjuvant radiotherapy.
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