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Parents Bargaining Power and Child’s Time Allocation in Iranian Households
, M.Sc. Thesis Sharif University of Technology ; Keshavarz Haddad, Gholamreza (Supervisor)
Abstract
This research intends to analysis the determinants of child work and schooling in Iran. To do this we use the Household’s Income and Expenditure survey of Iran in 2009. There are two competing theoretical base of household’s time allocation, the unitary and collective bargaining decision approaches. We use the later to consider the differences in preferences of parents toward the child’s time allocation. Making use of Bivariate Probit and Tobit, we examined the effects of parents’ bargaining power and child’s birth order on his/her schooling and work decision. Our finding, confirm that, mother’s bargaining power has negative association with the work participation of her son and daughter but...
The effect of additives on anode passivation in electrorefining of copper
, Article Chemical Engineering and Processing: Process Intensification ; Volume 46, Issue 8 , 2007 , Pages 757-763 ; 02552701 (ISSN) ; Yoozbashizadeh, H ; Sadegh Safarzadeh, M ; Sharif University of Technology
2007
Abstract
In copper electrorefining process, some additives are added to the electrolyte to improve the morphology of cathode deposits as well as the quality of products. In the present investigation, the effects of thiourea, glue and chloride ions (as additives) on the passivation of industrial copper anodes under high current densities have been reported. Experiments were conducted at 65 °C; using a synthetic electrolyte containing 40 g/l Cu2+ and 160 g/l H2SO4. Results obtained from chronopotentiometry experiments showed that increasing the concentration of chloride ion leads to increase in passivation time. The results also indicated that from a certain level on, namely 2 ppm, the increase in...
A stable and high-energy hybrid supercapacitor using porous Cu2O-Cu1.8S nanowire arrays
, Article Journal of Materials Chemistry A ; Volume 8, Issue 4 , 2020 , Pages 1920-1928 ; Qorbani, M ; Shown, I ; Ojaghi Dogahe, B ; Sharif University of Technology
Royal Society of Chemistry
2020
Abstract
A three-dimensional electrode based on porous Cu2O-Cu1.8S nanowires is prepared by means of a facile fabrication process. In this electrode, nanowires are decorated with Cu1.8S polyhedral nanostructures on the top, which are directly grown on a copper foam, thereby eliminating the need for a polymer binder. As an electrochemical electrode, it exhibits an extrinsic pseudocapacitive charge storage mechanism, which is different from that of battery-like Cu2O-CuO and Cu(OH)2 electrodes. The areal and volumetric capacitances of the Cu2O-Cu1.8S electrode can reach 2.6 F cm-2 and ∼200 F cm-3, respectively, at 2 mA cm-2, which are much higher than those obtained using copper(i, ii) oxide and...
Bioactive hybrid metal-organic framework (MOF)-based nanosensors for optical detection of recombinant SARS-CoV-2 spike antigen
, Article Science of the Total Environment ; Volume 825 , 2022 ; 00489697 (ISSN) ; Fatahi, Y ; Ahmadi, S ; Abbariki, N ; Ojaghi, A ; Rabiee, M ; Radmanesh, F ; Dinarvand, R ; Bagherzadeh, M ; Mostafavi, E ; Ashrafizadeh, M ; Makvandi, P ; Lima, E. C ; Saeb, M. R ; Sharif University of Technology
Elsevier B.V
2022
Abstract
Fast, efficient, and accurate detection of SARS-CoV-2 spike antigen is pivotal to control the spread and reduce the mortality of COVID-19. Nevertheless, the sensitivity of available nanobiosensors to detect recombinant SARS-CoV-2 spike antigen seems insufficient. As a proof-of-concept, MOF-5/CoNi2S4 is developed as a low-cost, safe, and bioactive hybrid nanostructure via the one-pot high-gravity protocol. Then, the porphyrin, H2TMP, was attached to the surface of the synthesized nanomaterial to increase the porosity for efficient detection of recombinant SARS-CoV-2 spike antigen. AFM results approved roughness in different ranges, including 0.54 to 0.74 μm and 0.78 to ≈0.80 μm, showing good...
Magnetic nanocomposites for biomedical applications
, Article Advances in Colloid and Interface Science ; Volume 308 , 2022 ; 00018686 (ISSN) ; Ghovvati, M ; Rabiee, N ; Ahmadi, S ; Abbariki, N ; Sojdeh, S ; Ojaghi, A ; Bagherzadeh, M ; Akhavan, O ; Sharifi, E ; Rabiee, M ; Saeb, M. R ; Bolouri, K ; Webster, T. J ; Zare, E. N ; Zarrabi, A ; Sharif University of Technology
Elsevier B.V
2022
Abstract
Tissue engineering and regenerative medicine have solved numerous problems related to the repair and regeneration of damaged organs and tissues arising from aging, illnesses, and injuries. Nanotechnology has further aided tissue regeneration science and has provided outstanding opportunities to help disease diagnosis as well as treat damaged tissues. Based on the most recent findings, magnetic nanostructures (MNSs), in particular, have emerged as promising materials for detecting, directing, and supporting tissue regeneration. There have been many reports concerning the role of these nano-building blocks in the regeneration of both soft and hard tissues, but the subject has not been...