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Ecological and health-related issues have given rise to scholars and investigators' concerns in exploring the determinantal effects of organic food. But little attention has paid to the actual buying behaviour regarding organic foods; especially in developing economies such as Pakistan. Therefore, this study aims to analyze the actual consumer's purchasing behaviour about organic food. A theoretical framework based on green perceived value was developed to observe the study's objectives that determine the consumers' buying behaviour and intention. The moderating effects of food neophobia was also analyzed. Structural Equation Modeling (SEM) approach is used for analysis, and data collection was made from millennial, which is considered the most significant consumer part in Pakistan. Answers of 1324 university students indicate that all values, i.e., social (0.101), functional (0.314), conditional (0.228), and emotional (0.521) has a significant and positive impact on buying intent of users. Furthermore, consumers' intention to buy organic produce (0.282) is positively linked with buying behaviour, and food neophobia (0.091) also moderates positively between intention to purchase and organic food consumption. Moreover, the current study offers valuable insights to manufacturers, researchers, and advertisers of natural food. The study concluded the suggestions for future studies, and the limitations of the study are also stated., Author(s): Umair Kashif [sup.1] , Chen Hong [sup.1] , Snovia Naseem [sup.1] , Waris Ali Khan [sup.2] , Muhammad Waqar Akram [sup.1] , Khalil Ur Rehman [sup.3] , Shahla Andleeb [...]

Recently, the thought of nanotechnology has endowed mankind to create materials of nanometer magnitudes. Nanoparticles or nanomaterials have diverse optical, chemical, thermal and physical possessions from their pre-supremacy corresponding item. Hence, this paper comprises the features of a Casson–Williamson flow field with nanoparticles. Here, we explored the impact of rate slip precondition on the mechanics of heat and mass transport over a stretched sheet with viscous dissipation, and heat generation in an exceedingly porous medium. The influence of Soret–Dufour, magneto-hydrodynamics (MHD) and thermal radiation is presumed. All chemical science specifications of nanofluid are measured as constant. As a result of motion of nanofluid particles, the fluid concentration is inspected underneath chemical implications. A collection of coupled partial differential frameworks is accustomed mathematically to formulate the physical model. The scheme for numerical study named Runge–Kutta approach along with shooting technique is implied to solve the obtained equations. The numerical procedure is then displayed pictorially, where fluid velocity, temperature and concentration against various pertinent parameters are examined. The velocity of the nanofluid encompasses a quicker rate within the deficiency of a magnetic factor; however, the velocity field possesses a reverse trend for Casson factor. The higher Eckert number intensifies the temperature of Casson fluid. Furthermore, the Casson parameter and the velocity slip parameter reduce the drag force and local Nusselt number. [ABSTRACT FROM AUTHOR]

Two-dimensional (2D) materials promise advances in electronic devices beyond Moore's scaling law through extended functionality, such as non-monotonic dependence of device parameters on input parameters. However, the robustness and performance of effects like negative differential resistance (NDR) and anti-ambipolar behavior have been limited in scale and robustness by relying on atomic defects and complex heterojunctions. In this paper, we introduce a novel device concept that utilizes the quantum capacitance of junctions between 2D materials and molecular layers. We realized a variable capacitance 2D molecular junction (vc2Dmj) diode through the scalable integration of graphene and single layers of stearic acid. The vc2Dmj exhibits NDR with a substantial peak-to-valley ratio even at room temperature and an active negative resistance region. The origin of this unique behavior was identified through thermoelectric measurements and ab initio calculations to be a hybridization effect between graphene and the molecular layer. The enhancement of device parameters through morphology optimization highlights the potential of our approach toward new functionalities that advance the landscape of future electronics. [ABSTRACT FROM AUTHOR]

The concurrent seropositivity of HBsAg and anti-HBs has been described among patients with chronic hepatitis B (CHB), but its prevalence is variable. HBV S-gene mutations can affect the antigenicity of HBsAg. Patients with mutations in the 'α' determinant region of the S gene can develop severe HBV reactivation under immunosuppression. In this study at a tertiary liver center in the United States, we evaluated the frequency and virological characteristics of the HBsAg mutations among CHB patients with the presence of both HBsAg and anti-HBs. In this cohort, 45 (2.1%) of 2178 patients were identified to have a coexistence of HBsAg and anti-HBs, and 24 had available sera for the genome analysis of the Pre-S1, Pre-S2, and S regions. The frequency of mutations in the S gene was significantly higher among those older than 50 years (mean 8.5 vs. 5.4 mutations per subject, p = 0.03). Twelve patients (50%) had mutations in the 'α' determinant region of the S gene. Mutations at amino acid position 126 were most common in eight subjects. Three had a mutation at position 133. Only one patient had a mutation at position 145—the classic vaccine-escape mutation. Despite the universal HBV vaccination program, the vaccine-escape mutant is rare in our cohort of predominantly Asian patients. [ABSTRACT FROM AUTHOR]