An embeddedness framing of governance and opportunism: towards a cross‐nationally accommodating theory of agency—critique and extension

Research on corporate governance has been increased in recent years, reflecting growing concern about the future of global capitalism. Much of this research has been under socialized. Lubatkin and colleagues attempt to address this serious shortcomings of past research. While making an important and informative contribution to research, I believe these authors overlook the questionable assumptions of agency models of governance. Lubatkin and colleagues also key issues resulting from the internationalization of corporate governance. Copyright © 2006 John Wiley & Sons, Ltd.     

Synthesis,Characterization and Application of α, β, and γ Cyclodextrin-Conjugated Graphene Oxide for Removing Cadmium Ions from Aqueous Media

In this study, a novel and facile route for the synthesis of cyclodextrin-conjugated graphene oxide (CDs–GO) nanocomposites by esterification reaction in the presence of EDC/DMAP as catalyst, was developed. The formation of CDs–GO was successfully approved by FT-IR, SEM, TEM, TGA and BET analyses. Then competitive adsorption capacity of cadmium ion by CDs–GO composites and the impact of different empirical parameters like contact time, initial metal ion concentration, and initial pH on the adsorption process were studied. The results showed that β-CD–GO at pH 7 is suitable for removing Cd(II) with 90?% removal efficiency. Also, the adsorption capacity experiment at constant concentration of 50 ppm of Cd(II) showed that more than 50?% of Cd(II) ions could be adsorbed by γ-CD–GO reaching an equilibrium within 2 h. Therefore, the γ-CD–GO and α-CD–GO showed high adsorption capacity toward Cd²⁺ (222.22 mg/g) which were pointedly more than that of β-CD–GO (208.33 mg/g). Furthermore, adsorption kinetics, isotherm studies, and thermodynamic analyses were evaluated. The adsorption data exhibited excellent fit to the pseudo-second-order (R²?>?0.99) and Freundlich isotherm models.

     

226Ra concentration in the teeth of habitants of areas with high level of natural radioactivity in Ramsar

The level of natural radiation in some regions of Ramsar, a northern coastal city of Iran, is known to be among the highest levels of natural radiation in the world. 226Ra existing in high concentrations in the soil of this region is washed by underground water and transferred to the surface. In this way, 226Ra enters the food chain of residents and substitutes within the hard body tissues of humans. 226Ra is one of the so-called bone seekers as its metabolic processes in the human body are similar to calcium and remains in hard tissues of body because of its long half-life, and being an alpha emitter causes dangerous effects on human health. The purpose of this study is to determine the concentration of 226Ra in the teeth of residents of these high-level natural radiation areas, compared with a control group. Thirteen teeth in five groups were studied as the case group and thirteen teeth in five corresponding control groups were inspected. The mean values of the activity of 226Ra in the case group and in the control group were 0.32 and 0.18mBqg(-1), respectively.     

Composite Film Based on Whey Protein Isolate/Pectin/CuO Nanoparticles/Betanin Pigments; Investigation of Physicochemical Properties

Journal of Polymers and the Environment - The aim of this work was to preparation of edible films based on whey protein isolate/pectin (WPIP) that containing betanin pigments (BP) and copper (I)...     

A Novel Aloe Vera-Loaded Ethylcellulose/Hydroxypropyl Methylcellulose Nanofibrous Mat Designed for Wound Healing Application

Journal of Polymers and the Environment - Newly, the usage of nanofibers (NFs) as wound dressings with the aim of their rapid healing and prevention of bacterial infection has been considered by...     

Carbon footprint calculation in one of the largest Gas Refinery Companies in the Middle East

Environmental Science and Pollution Research - Rapid technological advances in the natural gas industry raised access to natural gas reserves, related to increased greenhouse gas emissions,...     

Health risk assessment of inhalation exposure to dry fogging of hydrogen peroxide in a dental clinic during the COVID-19 pandemic

Environmental Science and Pollution Research - After the outbreak of COVID-19, many dental clinics use dry fogging of hydrogen peroxide (H2O2) to disinfect the air and surfaces. Inhalation of...     

Performance evaluation of sustainable projects: a possibilistic integrated novel analytic hierarchy process-data envelopment analysis approach using Z-Number information

Environment, Development and Sustainability - Selecting a proper set of projects is an important issue to make crucial decisions for many project-oriented organizations enabling them to achieve...