An overview of instrumented indentation technique for the study of micromechanical properties in food: A case study on bean seed coat

2021 ◽  
Vol 204 ◽  
pp. 377-385
Author(s):  
Mayra Nicolás-García ◽  
Israel Arzate-Vázquez ◽  
María de Jesús Perea-Flores ◽  
Juan Vicente Méndez-Méndez ◽  
Madeleine Perucini-Avendaño ◽  
...  
Keyword(s):  
Seed Coat ◽  
Bean Seed ◽  
Instrumented Indentation ◽  
Indentation Technique ◽  
Micromechanical Properties

Nondestructive Estimation of Fracture Toughness Using Instrumented Indentation Technique

2008 ◽  
Vol 385-387 ◽  
pp. 893-896
Author(s):  
Kyung Woo Lee ◽  
Hyun Uk Kim ◽  
Sang Wook Park ◽  
Jung Suk Lee ◽  
Kwang Ho Kim ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Damage Mechanics ◽  
Volume Fraction ◽  
Fracture Initiation ◽  
Continuum Damage Mechanics ◽  
Instrumented Indentation ◽  
Initiation Point ◽  
Indentation Technique ◽  
Proposed Model ◽  
Main Ideas

This study focused on the determination of fracture toughness by instrumented indentation technique. A theoretical model to estimate the fracture toughness of ductile materials is proposed and used to verify those results. Modeling of IIT to evaluate fracture toughness is based on two main ideas; the energy input up to characteristic fracture initiation point during indentation was correlated with material’s resistance to crack initiation and growth, and this characteristic fracture initiation point was determined by concepts of continuum damage mechanics. The estimated fracture toughness values obtained from the indentation technique showed good agreement with those from conventional fracture toughness tests based on CTOD. In addition, we confirmed that the proposed model can be also applied in the brittle material through modification of void volume fraction.

Developmental changes in the inner epidermis of the bean seed coat

PROTOPLASMA ◽  
1990 ◽  
Vol 154 (1) ◽  
pp. 45-52 ◽  
Author(s):  
E. C. Yeung ◽  
M. J. Cavey
Keyword(s):  
Seed Coat ◽  
Developmental Changes ◽  
Bean Seed

scholarly journals Reduced bioavailability of cyclosporine A in rats by mung bean seed coat extract

2014 ◽  
Vol 50 (3) ◽  
pp. 591-597
Author(s):  
Xiping Li ◽  
Ping Gao ◽  
Chengliang Zhang ◽  
Tao Wu ◽  
Yanjiao Xu ◽  
...  
Keyword(s):  
Seed Coat ◽  
Cyclosporine A ◽  
Mung Bean ◽  
Ethanol Extract ◽  
Blood Levels ◽  
Bean Seed ◽  
Ionization Source ◽  
Ethanol Extracts ◽  
T Values

Mung bean seed coat (MBSC) is a healthcare product in Asian countries. The aim of this study was to investigate the effect of an MBSC ethanol extract on the bioavailability of cyclosporine A (CsA) in rats. Rats were orally dosed with CsA alone or in combination with MBSC ethanol extracts (500 mg/kg, p.o.). The blood levels of CsA were assayed by liquid chromatography with an electrospray ionization source and tandem mass spectrometry (LC-MS/MS). The everted rat intestinal sac technique was used to determine the influence of MBSC on the absorption of CsA. The results reveal that combined CsA intake with MBSC decreased the Cmax, AUC0-t, t1/2z and MRT0-t values of CsA by 24.96%, 47.28%, 34.73% and 23.58%, respectively (P<0.05), and significantly raised the CL/F by 51.97% (P<0.01). The in vitro results demonstrated that significantly less CsA was absorbed (P<0.05). The overall results indicate that after being concomitantly ingested, MBSC reduced the bioavailability of CsA, at least partially, in the absorption phase.

scholarly journals PHYSICAL AND BROMATOLOGICAL CHARACTERISTICS OF COWPEA VARIETIES PREFERRED BY Callosobruchus maculatus (COLEOPTERA: BRUCHIDAE) 1

2018 ◽  
Vol 31 (2) ◽  
pp. 515-522
Author(s):  
GLAUCE PORTELA DE OLIVEIRA ◽  
DRYELLE SIFUENTES PALLAORO ◽  
ELISANGELA CLARETE CAMILI ◽  
ÂNDREA CARLA DALMOLIN
Keyword(s):  
Protein Content ◽  
Seed Coat ◽  
Crude Protein ◽  
Callosobruchus Maculatus ◽  
Fiber Content ◽  
Crude Protein Content ◽  
Bean Seed ◽  
Storage Unit ◽  
High Protein Content ◽  
Cowpea Varieties

ABSTRACT Cowpea is an herbaceous legume susceptible to several insects and diseases; and the beetle Callosobruchus maculatus is the main pest causing direct losses in the production of this crop. The objective of this work was to assess the physical and bromatological characteristics of beans of cowpea varieties (Bico-de-Ouro, BRS-Novaera, BRS-Guariba and BRS-Tumucumaque) preferred by C. maculatus. Adults of C. maculatus were obtained from a storage unit of cowpea beans. The physical and bromatological characteristics and attractiveness of cowpea beans to insects were evaluated in laboratory. The preferences for oviposition with no choice and attraction to cowpea beans by C. maculatus are not related to the high protein content or physical characteristics of the bean seed coat (thickness and fiber content), since the insects were more attracted to beans of the variety Bico-de-Ouro, which had low crude protein content, the thickest seed coat and high NDF content.

Measurement of Weld Mechanical Properties Using an Instrumented Indentation Technique

2017 ◽  
Vol 754 ◽  
pp. 383-386
Author(s):  
Kee Nam Song
Keyword(s):  
Mechanical Properties ◽  
Heat Affected Zone ◽  
Weld Zone ◽  
Base Material ◽  
Metal Structure ◽  
Instrumented Indentation ◽  
Welded Structures ◽  
Indentation Technique ◽  
Lower Confidence ◽  
Welded Structure

Different microstructures in the weld zone of a metal structure including a fusion zone and a heat affected zone, are formed as compared to the base material. Consequently, the mechanical properties in the weld zone are different from those in the base material to a certain degree owing to different microstructures and residual welding stresses. When a welded structure is loaded, the mechanical behavior of the welded structure might be different from the case of a structure with homogeneous mechanical properties. It is known that obtaining the mechanical properties in the weld is generally difficult owing to the narrow regions of the weld and interfaces. As an alternative way to obtain the weld mechanical properties, the weld mechanical properties of Alloy800HT, SUS316L, and Alloy617, were recently measured using an instrumented indentation technique, and the representative weld mechanical properties of these materials were estimated with a 95% lower confidence level for later structural analyses of the welded structures.

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