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Software and Systems Modeling - 相似文献
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Cinthya Huaman-Alvino Rosana Chirinos Fernando Gonzales-Pariona Romina Pedreschi David Campos 《International Journal of Food Science & Technology》2021,56(10):5040-5049
This work aimed evaluating some physicochemical compounds, hydrophilic (H-AC) and lipophilic (L-AC) antioxidant capacity of eleven avocado genotypes grown in the Andes. The results show great variability in physical and chemical properties, dry matter (DM) and lipid contents with ranges of 18.4–39.3% and 10.1–23.2%, respectively. All genotypes had high oleic acid content (50.4–69.9%) and a high unsaturated fatty acid/saturated fatty acid ratio (UFA/SFA, from 3.05 to 6.05), while the unsaponifiable fraction contained mainly β-sitosterol (140.83–235.51 mg/100 g DM) and α-tocopherol (17.44–71.29 µg/g DM). Total phenolic compounds (TPC), H-AC and L-AC ranged from 0.48 to 0.88 mg EAG/g DM, 5.37 to 14.00 and 1.87 to 6.71 μmol ET/g DM, respectively. Although the genotype influences avocado characteristics, climatic conditions in the Andean region seem to be important for the biosynthesis of metabolites of interest and should be considered in future studies. 相似文献
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Reina A. Mejía-Águila Ana Aguilar-Galvez Rosana Chirinos Romina Pedreschi David Campos 《International Journal of Food Science & Technology》2021,56(1):392-401
This work aimed to incorporate prebiotic FOS from yacon in apple slices using vacuum impregnation (VI). Three FOS concentrations (10.3, 14.1 and 18.9 g per 100 g of dry matter (DM)), two temperatures (25 and 35 °C), reuse of extracts and stability of the impregnated slices were evaluated. The highest impregnation level (30.5 g per 100 g DM) was obtained at 35 °C with 14.1% FOS extract while levels of common sugars were reduced. Total phenolics and ABTS antioxidant capacity (AC) slightly decreased while ORAC AC was reduced by 55%. Reuse of the impregnation solution in successive cycles after restoring the FOS level maintained the FOS concentration and profile (GF2–GF7), sugars and phenolic antioxidants. FOS in apple slices remained stable during 4 week storage, while aw, colour and fracture point changed during storage. This work demonstrated the feasibility of yacon FOS to improve the functional properties of dehydrated apple slices. 相似文献
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Romina Molina Julio Dondo Gazzano Fernando Rincon Veronica Gil-Costa Jesus Barba Ricardo Petrino Juan Carlos Lopez 《Journal of Real-Time Image Processing》2018,15(1):161-172
With the growing amount of multimedial content over the internet and broadcast systems, mechanisms for efficient information organization, manipulation and transmission are becoming indispensable. Optimization of the multimedia search and retrieval processes is nowadays an important area of development due to the difficulty to browse, filter and manage that big amount of data. The adoption of the MPEG-7 standard has a significant importance to simplify the image retrieval process. However, performance issues are still relevant when the retrieval must be accomplished in real time. This work presents an innovative and efficient approach of a Content-Based Retrieval Process using metric spaces implemented in heterogeneous resources according to the demand of computational power. Several implementations were made and comparative results are shown evidencing the benefits of the proposed approach. 相似文献
28.
Optimisation of extraction conditions and thermal properties of protein from the Andean pseudocereal cañihua (Chenopodium pallidicaule Aellen) 下载免费PDF全文
Indira Betalleluz‐Pallardel Marianela Inga Lizbeth Mera Romina Pedreschi David Campos Rosana Chirinos 《International Journal of Food Science & Technology》2017,52(4):1026-1034
Response surface methodology (RSM) was used to optimise alkaline protein extraction from cañihua grain meal as to maximise protein extraction yield. Different factors (temperature, extraction time, solvent/meal ratio, pH and NaCl molar concentration) were screened, and their significant influence on the extracted protein yield was evaluated. The first four factors were selected and studied by RSM using a central composite design (CCD). The obtained model produced a satisfactory fitting of the results (R2 = 0.801). Optimal cañihua protein extraction conditions corresponded to a temperature of 21 °C, time extraction of 5 min, solvent/meal ratio of 37/1 (v/w) at pH 10 resulting in a protein yield of 80.4 ± 1.3%, which closely agree with the predicted value of 81.4%. Moreover, protein degradation was studied via differential scanning calorimetry (DSC) obtaining a denaturation temperature of 93.4 °C and an enthalpy value of 1.22 ± 0.05 J g?1. These results are interesting from a technological point to help in designing an optimal protein extraction process and cañihua food processing strategies. 相似文献
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Montserrat Dueñas Hugo Mingo-Chornet José Joaquín Pérez-Alonso Romina Di Paola-Naranjo Ana M. González-Paramás Celestino Santos-Buelga 《European Food Research and Technology》2008,227(4):1069-1076
Quercetin is the main flavonol in the human diet, and the most commonly used in studies of biological activity. The major
circulating forms of quercetin found in the human plasma after consumption of food containing distinct quercetin glycosides
are glucuronides and sulfates. In this work quercetin glucuronides have been obtained from green beans (quercetin 3-glucuronide)
and by enzymic synthesis (quercetin 4′-glucuronide) using a modification of the method described by Plumb et al. (Methods
in polyphenol analysis, The Royal Society of Chemistry, Cambridge, pp 187, 2003) so as to improve the original low yields
of that methodology. The method finally optimised got yields of 19% in the preparation of quercetin 4′-glucuronide, which
allows its further isolation for their use in biological assays. In addition, quercetin 3′-glucuronide, 3-glucuronide and
a diglucuronide were synthesised with lower yields. The compounds prepared have been employed to perform assays in order to
obtain data for their identification by HPLC coupled to photodiode array detection and tandem mass spectrometry. It was observed
that the analysis by HPLC–ESI/MS/MS could allow the identification of different quercetin glucuronides based on the presence
of some minor key MS2 fragments. 相似文献
30.
Romina Pallisco Giacomo Lazzarino Gabriele Bilotta Francesca Marroni Renata Mangione Miriam Wissam Saab Maria Violetta Brundo Alessandra Pittal Giuseppe Caruso Elena Capoccia Giuseppe Lazzarino Barbara Tavazzi Pasquale Bilotta Angela Maria Amorini 《International journal of molecular sciences》2023,24(1)
Notwithstanding the great improvement of ART, the overall rate of successful pregnancies from implanted human embryos is definitely low. The current routine embryo quality assessment is performed only through morphological criteria, which has poor predictive capacity since only a minor percentage of those in the highest class give rise to successful pregnancy. Previous studies highlighted the potentiality of the analysis of metabolites in human embryo culture media, useful for the selection of embryos for implantation. In the present study, we analyzed in blind 66 human embryo culture media at 5 days after in vitro fertilization with the aim of quantifying compounds released by cell metabolism that were not present as normal constituents of the human embryo growth media, including purines, pyrimidines, nitrite, and nitrate. Only some purines were detectable (hypoxanthine and uric acid) in the majority of samples, while nitrite and nitrate were always detectable. When matching biochemical results with morphological evaluation, it was found that low grade embryos (n = 12) had significantly higher levels of all the compounds of interest. Moreover, when matching biochemical results according to successful (n = 17) or unsuccessful (n = 25) pregnancy, it was found that human embryos from the latter group released higher concentrations of hypoxanthine, uric acid, nitrite, and nitrate in the culture media. Additionally, those embryos that developed into successful pregnancies were all associated with the birth of healthy newborns. These results, although carried out on a relatively low number of samples, indicate that the analysis of the aforementioned compounds in the culture media of human embryos is a potentially useful tool for the selection of embryos for implantation, possibly leading to an increase in the overall rate of ART. 相似文献