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Kinetics and antioxidant capacity of proanthocyanidins encapsulated in zein electrospun fibers by cyclic voltammetry
2016 / Journal of Agricultural and Food ChemistryThe proanthocyanidins encapsulated in zein (zein-PA) fibers was via electrospinning technique. The kinetics and antioxidant capacity of PA from zein fibers was investigated by cyclic voltammetry. Circular dichroism was used to investigate the secondary structure change of zein and its influence on the shape of fibers. The addition of PA caused a significant increas...
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Securing Important Strigolactone Key Structures: Orobanchol and 5-Deoxystrigol
2016 / European Journal of Organic ChemistryStrigolactones (SLs) constitute an important new class of plant hormones. Their isolation from natural resources, such as root exudates, is laborious and difficult. Therefore, synthetic SLs are needed to discover their (biological) properties. Such syntheses involve many steps. When repeating a published procedure for the synthesis of orobanchol, we noticed that th...
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Nanopharmaceutical approach using pelargonidin towards enhancement of efficacy for prevention of alloxan-induced DNA damage in L6 cells via activation of PARP and p53
2016 / Environmental MicrobiologyAlloxan is an environmental food contaminant that causes DNA damage in living cells and induces hyperglycemia. Pelargonidin (PG), an active ingredient found in extract of various fruits and vegetables, has been nanoencapsulated (NPG) with poly-lactide-co-glycolide (PLGA) and tested for efficacy in prevention of alloxan (ALX)-induced DNA damage in L6 cells in vitro....
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New alkaloids from the leaves of Evodia rutaecarpa
2016 / Natural Product ResearchOne new indole alkaloid (1) and one new indole alkaloidal glycoside (2), together with nine known alkaloids (3–11), were isolated from the leaves of Evodia rutaecarpa. Their structures were determined on the basis of spectroscopic and chemical methods. Compound 4 exhibited potent activity against Pseudomonas aeruginosa with an MIC value of 7.13 μg/ml.
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Cytotoxic polycyclic polyprenylated acylphloroglucinol derivatives and xanthones from Hypericum attenuatum
2016 / Phytochemistry LettersTwo new polycyclic polyprenylated acylphloroglucinols, attenuatumione G (1) and attenuatumione H (2), together with five known compounds (3–7) have been isolated from the whole plant of Hypericum attenuatum. Their structures were elucidated by spectroscopic data including HRESIMS, 1D- and 2D-NMR. In biological assays, compound 2 showed moderate cytotoxic acti...
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Functional and structural characterization of domain truncated violaxanthin de-epoxidase
2016 / Physiologia PlanatrumPhotosynthetic organisms need protection against excessive light. By using non-photochemical quenching, where the excess light is converted into heat, the organism can survive at higher light intensities. This process is partly initiated by the formation of zeaxanthin, which is achieved by the de-epoxidation of violaxanthin and antheraxanthin to zeaxanthin. This re...
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Sesquiterpenes from the leaves of Nicotiana tabacum and their anti-tobacco mosaic virus activity
2016 / Chinese Chemical LettersIn searching for more bioactive compounds, phytochemical investigations on the acetone extract of the leaves of Nicotiana tabacum resulted in the isolation of two new sesquiterpenes, nicosesquiterpene A and B (1 and 2), along with four known sesquiterpene derivatives (3–6). Structural elucidation of 1 and 2 was performed by spectral methods, such as HRMS, IR,...
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Isolation and characterization of wound-induced compounds from the leaves of Citrus hassaku
2016 / Journal of Bioscience and BioengineeringCitrus plants are world widely cultivated as horticultural tree crops, and nowadays their pharmacological activities have been well studied. Since research of defense responses in citrus plants have been mainly focused on the post-harvested fruits because of their commercial importance, defense mechanisms during their developmental stages have not been well underst...
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A new acylated flavonol from the aerial parts of Asteriscus maritimus (L.) Less (Asteraceae)
2016 / Natural Product ResearchPhytochemical investigation of the flowering aerial parts of Asteriscus maritimus (L.) Less (Asteraceae) led to the isolation of a new compound: patuletin 7-O-β-D-[(2″′S) 6″(3″′-hydroxy-2″′-methyl-propanoyl)] glucopyranoside, together with five known metabolites; β-sitosterol 2, chlorogenic acid 3, P-hydroxy -meth...
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Naphthalenones and Depsidones from a Sponge-Derived Strain of the Fungus Corynespora cassiicola
2016 / Molecules: Two new naphthalenones, corynenones A and B (1 and 2), and one new depsidone, corynesidone E (3), together with one known depsidone, corynesidone A (4) and two known diphenyl ethers, corynethers A (5) and B (6), were isolated from the sponge-derived fungus Corynespora cassiicola XS-20090I7. Their structures including absolute configurations were determined by spe...
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Characteristic changes in algal organic matter derived from Microcystis aeruginosa in microbial fuel cells
2015 / Bioresource TechnologyThe objective of this study was to investigate behavior of algal organic matter (AOM) during bioelectrochemical oxidation in microbial fuel cell in terms of compositions and structures. Study revealed that the AOM derived from blue-green algae Microcystis aeruginosa could be degraded more completely (82% COD removal) in microbial fuel cells (MFCs) than by anaerobic...
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Antagonistic Activities of Novel Peptides from Bacillus amyloliquefaciens PT14 against Fusarium solani and Fusarium oxysporum
2015 / Journal of Agricultural and Food ChemistryBacillus species have recently drawn attention due to their potential use in the biological control of fungal diseases. This paper reports on the antifungal activity of novel peptides isolated fromBacillus amyloliquefaciens PT14. Reverse-phase high-performance liquid chromatography revealed that B. amyloliquefaciens PT14 produces five peptides (PT14-1, -2, -3, -4a,...
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Anti-inflammatory amide alkaloids from the stems of Clausena emarginata
2014 / Journal of Asian Natural Products ResearchTwo new amide alkaloids, clauemaramide A (1) and clauemaramide B (2), and three known analogs were isolated from the stems of Clausena emarginata. Their structures were determined on the basis of spectroscopic analyses. The absolute configurations of 1and 2 were confirmed by CD spectroscopy. Compound 3 showed moderate inhibitory effects on LPS-induced NO production...
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Photodegradation of carbendazim sensitized by aromatic ketones
2013 / Journal of Photochemistry and Photobiology A: ChemistryCarbendazim (1) is a benzimidazole extensively used as post-harvest fungicide on fruits and vegetables. The aim of the present work is to study the photodegradation of 1sensitized by aromatic ketones, with special attention to mechanistic aspects and to the possible detoxification associated with photochemical treatment. Laser flash photolysis (LPF) λexc = 3...
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α-Glucosidase Inhibitors via Green Pathway: Biotransformation for Bicoumarins Catalyzed by Momordica charantia Peroxidase
2013 / Journal of Agricultural and Food ChemistryPeroxidase extracted from Momordica charantia catalyzed the H2O2-dependent oxidative coupling of 7-hydroxy-4-methylcoumarin to form four new dimers (1–4) and two known ones (5,6). The structures, including the absolute configurations of axially chiral compounds, were unambiguously characterized by NMR spectroscopy, online HPLC-CD, and a variety of computation...
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