Characterized Polysaccharides from Green Tea Inhibited Starch Hydrolysis and Glucose Intestinal Uptake by Inducing Microstructural Changes of Wheat Starch

Starch digestibility may be affected by food microstructural changes, as well as by specific interactions with some biomolecules, such as soluble dietary fibers (SDFs). It is well-known that acrylamide (AA) is a toxic and potentially carcinogenic compound formed in starchy food products processed at temperatures above 120 °C. This study aimed to investigate the effect of the addition of SDF and green tea polyphenols (GTP) on AA formation and in vitro starch digestibility in baked starchy matrices. The formulations were prepared using gluten and wheat starch, ensuring ~40 ± 2% (wet basis, w.b.) moisture in the doughs. In some samples, 7.5% (dry basis, d.b.) of starch was replaced with inulin (IN), polydextrose (PD) or partially hydrolyzed guar gum (PHGG), and/or with GTP at 1% (d.b). Acrylamide was determined by gas chromatography–mass spectrometry, and the in vitro starch digestibility using the Englyst method. The GTP was able to reduce AA content by ~48%, and a combination of IN-GTP allowed it to be reduced by up to ~64%, revealing the lowest rapidly available glucose content (~17 mg/g glucose). While a PD-GTP mixture reduced the AA content by around ~57% and gave the highest unavailable glucose fraction (~74 mg/g glucose) compared to the control. This study showed how functional ingredients could be used to develop successfully healthier starchy bakery foods.

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In-vitro starch hydrolysis of chitosan incorporating whey protein and wheat starch composite gels

Heliyon ◽

10.1016/j.heliyon.2017.e00421 ◽

2017 ◽

Vol 3 (10) ◽

pp. e00421 ◽

Cited By ~ 4

Author(s):

Natasha Yang ◽

John Ashton ◽

Elisabeth Gorczyca ◽

Stefan Kasapis

Keyword(s):

Whey Protein ◽

Wheat Starch ◽

Starch Hydrolysis ◽

Composite Gels ◽

Hydrolysis Of

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α-Amylase inactivation during wheat starch hydrolysis process

Process Biochemistry ◽

10.1016/s0032-9592(01)00175-3 ◽

2001 ◽

Vol 37 (1) ◽

pp. 87-95 ◽

Cited By ~ 20

Author(s):

Belma Özbek ◽

Semra Yüceer

Keyword(s):

Wheat Starch ◽

Starch Hydrolysis ◽

Hydrolysis Process

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Investigation of effect of anti-angiogenic green tea extract on the mechanical, physical and wound healing property of 2D wheat starch-sodium alginate biocomposite film

Journal of Drug Delivery Science and Technology ◽

10.1016/j.jddst.2019.04.022 ◽

2019 ◽

Vol 52 ◽

pp. 255-262

Author(s):

Zubin Shah ◽

Clara Fernandes ◽

Divya Suares

Keyword(s):

Wound Healing ◽

Sodium Alginate ◽

Green Tea ◽

Green Tea Extract ◽

Wheat Starch ◽

Healing Property ◽

Tea Extract ◽

Biocomposite Film ◽

Wound Healing Property

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Profiling of In Vitro Bioaccessibility and Intestinal Uptake of Flavonoids after Consumption of Commonly Available Green Tea Types

Molecules ◽

10.3390/molecules26061518 ◽

2021 ◽

Vol 26 (6) ◽

pp. 1518

Author(s):

Jeong-Ho Oh ◽

Chan-Yang Lee ◽

Yeong-Eun Lee ◽

So-Hee Yoo ◽

Jin-Oh Chung ◽

...

Keyword(s):

Intestinal Absorption ◽

Green Tea ◽

In Vitro Digestion ◽

Model System ◽

Intestinal Uptake ◽

In Vitro Bioaccessibility

The aim of this study was to profile the bioaccessibility and intestinal absorption of epicatechins and flavonols in different forms of green tea and its formulation: loose leaf tea, powdered tea, 35% catechins containing GTE, and GTE formulated with green tea-derived polysaccharide and flavonols (CATEPLUS™). The bioaccessibillity and intestinal absorption of epicatechins and flavonols was investigated by using an in vitro digestion model system with Caco-2 cells. The bioaccessibility of total epicatechins in loose leaf tea, powdered tea, GTE, and CATEPLUS™ was 1.27%, 2.30%, 22.05%, and 18.72%, respectively, showing that GTE and CATEPLUS™ had significantly higher bioaccessibility than powdered tea and loose leaf tea. None of the flavonols were detected in powdered tea and loose leaf tea, but the bioaccessibility of the total flavonols in GTE and CATEPLUS™ was 85.74% and 66.98%, respectively. The highest intestinal absorption of epicatechins was found in CATEPLUS™ (171.39 ± 5.39 ng/mg protein) followed by GTE (57.38 ± 9.31), powdered tea (3.60 ± 0.67), and loose leaf tea (2.94 ± 1.03). The results from the study suggest that formulating green tea extracts rich in catechins with second components obtained from green tea processing could enhance the bioavailability of epicatechins.

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Phenomena Associated with Oxygen in Titanium

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100061562 ◽

1967 ◽

Vol 25 ◽

pp. 310-311

Author(s):

E. U. Lee ◽

P. A. Garner ◽

J. S. Owens

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Electron Microscope ◽

Microstructural Changes ◽

Electrolytic Polishing ◽

Interstitial Impurities ◽

Thin Foils ◽

Transmission Electron ◽

Iodide Titanium ◽

Alpha Titanium

Evidence for ordering (1-6) of interstitial impurities (O and C) has been obtained in b.c.c. metals, such as niobium and tantalum. In this paper we report the atomic and microstructural changes in an oxygenated c.p.h. metal (alpha titanium) as observed by transmission electron microscopy and diffraction.Oxygen was introduced into zone-refined iodide titanium sheets of 0.005 in. thickness in an atmosphere of oxygen and argon at 650°C, homogenized at 800°C and furnace-cooled in argon. Subsequently, thin foils were prepared by electrolytic polishing and examined in a JEM-7 electron microscope, operated at 100 KV.

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Tensile Creep of Y-Si3N4: II. Cavitation

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100089172 ◽

1991 ◽

Vol 49 ◽

pp. 972-973 ◽

Cited By ~ 1

Author(s):

B. J. Hockey ◽

S. M. Wiederhorn

Keyword(s):

Silicon Nitride ◽

Creep Rupture ◽

Tensile Creep ◽

Sintering Aids ◽

Microstructural Changes

ATEM has been used to characterize three different silicon nitride materials after tensile creep in air at 1200 to 1400° C. In Part I, the microstructures and microstructural changes that occur during testing were described, and consistent with that description the designations and sintering aids for these materials were: W/YAS, a SiC whisker reinforced Si3N4 processed with yttria (6w/o) and alumina (1.5w/o); YAS, Si3N4 processed with yttria (6 w/o) and alumina (1.5w/o); and YS, Si3N4 processed with yttria (4.0 w/o). This paper, Part II, addresses the interfacial cavitation processes that occur in these materials and which are ultimately responsible for creep rupture.

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