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排序方式: 共有649条查询结果,搜索用时 15 毫秒
641.
Naji Elhadi Aborus Jasna Čanadanović‐Brunet Gordana Ćetković Vesna Tumbas Šaponjac Jelena Vulić Nebojša Ilić 《International Journal of Food Science & Technology》2017,52(1):231-238
This study was performed to evaluate the phytochemical composition, in vitro antioxidant capacity, antihyperglycaemic and anti‐inflammatory activities, and simulated gastrointestinal digestion of 7‐day‐old freeze‐dried barley sprouts (BS), one hybrid and one nonhybrid variety: ‘NS565’ (BSNS) and ‘Golozrni’ (BSG), respectively. BSNS expressed significantly higher (P ≤ 0.05) content of total phenols, chlorophyll and carotenoids. Phenolic compounds were the most dominant bioactives in both BSNS and BSG (713.25 and 479.02 mg GAE 100 g?1 DW, respectively). BSNS possessed significantly higher (P ≤ 0.05) antioxidant capacity, evaluated by DPPH and ABTS assays, and reducing power ( = 0.54 mg mL?1; IC50ABTS = 0.79 mg mL?1; RP0.5 = 9.35 mg mL?1). Antihyperglycaemic and anti‐inflammatory activities of BSNS ( = 1.43 mg mL?1; = 1.86 mg mL?1) were also significantly higher (P ≤ 0.05) than BSG ( = 1.97 mg mL?1; = 4.40 mg mL?1). In vitro simulation of gastrointestinal digestion showed higher release of phenolic compounds in intestinal fluid than in gastric fluid. 相似文献
642.
利用初流量法分析有自由面渗流问题之改进 总被引:1,自引:0,他引:1
在利用初流量法分析带有自由面的渗流问题时,常因采用高斯积分点作为结点初流量计算判断依据所带来的误差而令解出现振荡。为了减低这一因素的影响及提高计算的效率,针对常用的 4 结点平面单元和 8 结点 6 平面三维单元的自由面方程进行分析,提出采用坐标变换和等参变换等技术来改造结点初流量的计算,并建议按自由面穿越单元之状况引用分部积分,使其积分上、下限符合高斯积分法的格式化要求,从而可利用高斯积分法求出精确的结点初流量,而精确的结点初流量则有助于改善解的振荡及提高计算结果的精度。通过一矩形均质坝实例分析,表明该方法的稳定性和收敛性良好。 相似文献
643.
Galacto-oligosaccharides (GOS) have many biological functions. They are produced from lactose by a glycosyl transfer of one or more d-galactosyl units onto the d-galactose moiety of lactose catalysed by β-galactosidase. This reaction can proceed in batch or in continuous system. Membrane reactor with ultrafiltration ceramic membrane (150 kDa) was used and batch system as well. Lactose in phosphate buffer (197.9 g L−1), recombined whey (197 g L−1) and evaporated ultrafiltration permeate (200.7 g L−1) were used as substrates. The used concentration of enzyme Maxilact LX 5000 was 6 U mL−1. The highest concentration of GOS in buffer was reached after 30 min of batch reaction and it was 25.5 g L−1, for recombined whey it was 31.1 g L−1 and for ultrafiltration permeate it was 32.9 g L−1. For continuous process was obtained 8.8 g L−1 of GOS for buffer and 21.0 g L−1 for recombined whey and 16.7 g L−1 of GOS for ultrafiltration permeate. 相似文献
644.
645.
A slurry sampling technique has been utilised for the determination of Na, K, Ca, Mg, S, P, Fe, Mn, Cu and Zn in wheat-flour and flour-based ready-oven foods using ICP-OES and a direct aqueous calibration technique. For 0.1% w/v suspension of flour in 0.1% w/v Triton X-100 and 6% v/v HNO3, the procedural limits of detection (all in mg kg−1) for Na, K, Mg, Ca, P, S, Fe, Zn, Mn and Cu were 7.51, 61.1, 0.645, 1.59, 5.25, 4.58, 1.50, 1.07, 0.867 and 1.58, respectively. The precision was expressed as the relative standard deviation (RSD) of 5–10% (n = 10) for 0.1% w/v suspension of wheat-flour. The accuracy was confirmed by the analysis of reference materials wheat-flour GBW 08503 and rice flour NIST 1568a. 相似文献
646.
Nataša Golić Neža Čadež Amarela Terzić-Vidojević Hana Šuranská Jasna Beganović Jelena Lozo Blaženka Kos Jagoda Šušković Peter Raspor Ljubiša Topisirović 《International journal of food microbiology》2013
The goal of this study was the characterisation of indigenous lactic acid bacteria (LAB) and yeasts isolated from nine white pickled (BG) and nine fresh soft (ZG) artisanal cheeses collected in Serbia and Croatia. While LAB were present in all of the cheeses collected, yeasts were found in all BG cheeses but only in three ZG cheese samples. High LAB and yeast species diversity was determined (average H′L = 0.4 and H′Y = 0.8, respectively). The predominant LAB species in white pickled (BG) cheeses were Lactococcus lactis, Lactobacillus plantarum, and Leuconostoc mesenteroides, while in fresh soft (ZG) cheeses the most dominant LAB species were L. lactis, Enterococcus faecalis, and Leuconostoc pseudomesenteroides. Among the 20 yeast species found, Debaryomyces hansenii, Candida zeylanoides, and Torulaspora delbrueckii were found to be predominant in BG cheeses, while Yarrowia lipolytica was predominant in ZG cheeses. The characterisation of metabolic and technological potentials revealed that 53.4% of LAB isolates produced antimicrobial compounds, 44.3% of LAB strains showed proteolytic activity, while most of the yeast species possessed either lipolytic or proteolytic activity. In conclusion, the results obtained in this study showed that the composition of LAB and yeast populations in white pickled and fresh soft cheeses is region specific. The knowledge gained in this study could eventually be used to select region specific LAB and yeast strains for the production of white pickled and fresh soft artisanal cheeses with geographically specific origins under controlled conditions. 相似文献
647.
Kristina Žagar Cristian Fàbrega Francisco Hernandez-Ramirez Joan Daniel Prades Joan Ramon Morante Aleksander Rečnik Miran Čeh 《Materials Chemistry and Physics》2013
Titanates are suitable for many applications such as oxygen sensing and tunable HTS (high temperature superconducting) microwave filters. The potential advantages of the nanostructured forms have been however scarcely explored compared to other oxides. In this work, the structural and electrical properties of individual iron-doped strontium titanate nanotubes (Fe:SrTiO3) grown by electrophoretic deposition (EPD) were assessed for the first time, showing high stability and reproducibility. This result paves the way to further development of more complex titanate-based devices, as for instance nanostructured oxygen STFO sensors. From experimental data, it was concluded that the polycrystalline form of Fe:SrTiO3 nanotubes is the major limitation to attain high photoconductivity gains when exposed to UV-light. 相似文献
648.
649.
Stefano Scaramuzza Clara M.G. de Faria Vito Coviello Daniel Forrer Luca Artiglia Denis Badocco Paolo Pastore Paolo Ghigna Ian Postuma Laura Cansolino Cinzia Ferrari Silva Bortolussi Riccardo Vago Antonello E. Spinelli Marina Bekić Miodrag Čolić Vincenzo Amendola 《Advanced functional materials》2023,33(42):2303366
New multifunctional theranostic vectors allow the expansion of cancer therapeutic approaches toward scarcely investigated fields. One example is the combination of boron neutron capture therapy (BNCT) and X-ray radiotherapy (XRT) for treating normal and XRT-resistant hypoxic tumor regions and reduce recurrence. Of great relevance for BNCT is also the support of viable, rapid, safe, and reliable techniques for the localization and quantification of the radiosensitizers in the tissues. To address these challenges, polymer-coated Au-B nanoparticles (NPs) are obtained starting from a laser ablation in liquid process. Despite thermodynamic constraints, the two elements coexist by short-range boron segregation in the gold lattice, as demonstrated experimentally and explained with the support of density functional theory calculations. Thus, the Au-B NPs maintain a marked gold character such as biocompatibility, stability, and straightforward surface chemistry with thiolated compounds, desirable for the integration with agents capable of cell targeting and internalization. Overall, the Au-B NPs exhibit the appropriate features for the investigation of combined BNCT and XRT, supported by the localization and quantification with X-ray computed tomography imaging. Besides, the Au-B nanotechnology tool is achievable without renouncing to reproducibility, environmental sustainability, and cost affordability thanks to the laser-assisted synthetic pathway. 相似文献