M. floribunda fruit was studied to characterize its chemical composition. The chemical composition, bioactive compounds, antioxidant activity and volatiles of the fruit were determined. The chemical composition was determined according to AOAC and AOCS, the bioactive compounds by HPLC, the volatiles by GCMS and the antioxidant activity by ABTS and DPPH methods. The chemical composition of the freeze-dried fruit was 1.89 g·100 g, 2.43 g·100 g, 4.78 g·100 g and 90.89 g·100 g of ashes, lipids, proteins and total carbohydrates on a dry base, respectively. The concentration of the carotenoids was 52.22 mg·100 g and for the flavonoid rutin was 78.56 mg·100 g. The gallic and ellagic acid contents were 5.45 mg·g and 2.21 mg·g, respectively. The cis-β-ocimene corresponded to 50.90% of the volatiles. The antioxidant activity by ABTS method was 550.14 µmol Trolox·g and by the DPPH method the EC was 85.68 g·g. The fruits presented relevant antioxidant activity, a high concentration of carotenoids and of rutin.
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http://dx.doi.org/10.1016/j.foodchem.2017.12.053 | DOI Listing |
Anal Chem
January 2025
College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, China.
Abnormal ferrous ion (Fe) levels lead to an increase in reactive oxygen species (ROS) in cells, disrupting intracellular viscosity and the occurrence of hepatocellular carcinoma (HCC). Simultaneously visualizing Fe and intracellular viscosity is essential for understanding the detailed pathophysiological processes of HCC. Herein, we report the first dual-responsive probe, , capable of simultaneously monitoring Fe and viscosity.
View Article and Find Full Text PDFAnal Chem
January 2025
State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha 410082, China.
To facilitate on-site detection by nonspecialists, there is a demand for the development of portable "sample-to-answer" devices capable of executing all procedures in an automated or easy-to-operate manner. Here, we developed an automated detection device that integrated a magnetofluidic manipulation system and a signal acquisition system. Both systems were controllable via a smartphone.
View Article and Find Full Text PDFJ Org Chem
January 2025
Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, China.
We herein report a Rh(III)-catalyzed C-H bond coupling of -chloroimines with maleimides, in which the [4 + 2] annulation and dehydrogenative annulation processes can be selectively achieved by simply adjusting the reaction conditions. This protocol is compatible with various functional groups, shows exquisite selectivity, and presents a concise synthetic procedure to respective products in moderate to good yields. With all these merits, this strategy may be applicable in the construction of related azaheterocyclic skeletons.
View Article and Find Full Text PDFEnviron Technol
January 2025
Department of Chemical Sciences, University of Johannesburg, Johannesburg, South Africa.
An increasing amount of water pollution is being caused by an increase in industrial activity. Recently, a wide range of methods, including extraction, chemical coagulation, membrane separation, chemical precipitation, adsorption, and ion exchange, have been used to remove heavy metals from aqueous solutions. The adsorption technique is believed to be the most highly effective method for eliminating heavy metals from wastewater among all of them.
View Article and Find Full Text PDFAdv Mater
January 2025
Department of Chemistry, New Cornerstone Science Laboratory, Institute of Biomimetic Materials & Chemistry, Anhui Engineering Laboratory of Biomimetic Materials, Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, 230026, China.
With increasing concern about the environmental pollution of petrochemical plastics, people are constantly exploring environmentally friendly and sustainable alternative materials. Compared with petrochemical materials, cellulose has overwhelming superiority in terms of mechanical properties, thermal properties, cost, and biodegradability. However, the flammability of cellulose hinders its practical application to a certain extent, so improving the fire-retardant properties of cellulose nanofiber-based materials has become a research focus.
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