the electrochemistry of banana tissues on a carbon paste electrode modified with multi-walled carbon nanotubes (mwcnts) is presented. cyclic voltammetry is applied to investigate the direct electrochemistry of banana tissues i.e. a source of polyphenol oxidase (ppo). a redox couple with an anodic and counterpart cathodic peak is obtained. the influence of various parameters such as ph, scan rat...

In this chapter we look at the strategic issue facing firms regarding whether or not to remanufacture their used products. We identify some direct costs of remanufacturing as well as some opportunity costs that should be included in a firm’s decision to remanufacture or support the secondary market of remanufactured products. We also explore how this decision may change under different competit...

The purpose of this paper is the study of direct limits in category of Krasner (m, n)-hyperrings. In this regards we introduce and study direct limit of a direct system in category (m, n)-hyperrings. Also, we consider fundamental relation , as the smallest equivalence relation on an (m, n)-hyperring R such that the quotient space is an (m, n)-ring, to introdu...

A central issue in contemporary epistemology is whether there is a species of (prima facie) justification that is immediate, direct, basic, or foundational. It is puzzling whether and how immediate justification could arise. This is perhaps the core issue that divides foundationalists from coherentists. An older conception of immediate justification is that some beliefs are capable of self-just...

The digital transformation leads to an enormous change in the customer-firm relationship. Recently launched firm-sponsored online customer networks enable customers to actively interact with the company and other customers in form of social engagement activities like asking and answering questions or receiving feedback. Despite the increasing importance of online customer networks, existing lit...

The massless field perturbations of the accelerating Minkowski and Schwarzschild spacetimes are studied. The results are extended to the propagation of the Proca field in Rindler spacetime. We examine critically the possibility of existence of a general spin-acceleration coupling in complete analogy with the well-known spin-rotation coupling. We argue that such a direct coupling between spin an...

background: high prevalence and increasing rate of asthmatic patients around the word witnesses the high burden of asthma. we have limited data on asthma burden and economic costs in iran. this study aimed to find direct and indirect economic costs of asthma and their association with some background factors in one of the referral tertiary centers for adult patients with asthma. methods: we sur...

background and purpose: azo dyes including direct blue 71 (db71) are toxic, mutagenic and carcinogenic contaminants in effluents of industries. this study aimed to investigate the adsorption of db71 from aqueous solution onto pistachio hull waste (phw) as a low-cost adsorbent. materials and methods: a series of experiments were performed via batch adsorption technique to examine the effect of t...