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Article Processing Charges (APCs)Asia Pacific Academy of Science Pte. Ltd. publishes all its journals in Gold Open Access format. In order to defray our editorial and production costs, authors of the accepted articles are required to pay an article processing charge (APC) of USD 800. The charges will come from authors' institutes or research funding bodies. MI receives financial support from Beijing Chuncheng Education Publications Research Center, hence there is no article processing charge (APC) or fees payable for article publication for the time being. APC PaymentPayments for APC of this journal can be made through our online PayPal payment gateway. Enter the article no. into the below textbox and select "Pay Now" to proceed with payment. *Article No. is mandatory for payment and it can be found on the acceptance letter issued by the Editorial Office. Payment without indicating Article No. will result in processing problem and delay in article processing. Please note that payments will be processed in USD. You can make payment through Masters, Visa or UnionPay card. |
Latest Articles
by
Saeed Reza Hormozi Jangi
Micromat. Interf.
2023
,
1(1);
268 Views,
0 PDF Downloads
Abstract
In this contribution, the biochemical characterization of enzyme-like nanosilvers was performed toward nanozyme-catalyzed oxidation reactions. In this regard, silver nanoparticles were synthesized via a simple chemical reduction method and then characterized by the TEM imaging method. Afterward, their enzyme-like activity was investigated toward catalysis of the oxidation reaction of 3,3’,5,5’-tetramethyl-benzidine (TMB) as one of the most popular peroxidase substrates. The results exhibited a specific nanozymatic activity as high as 5400 nM min −1 for the as-synthesized nanosilvers toward TMB oxidation. Due to the high enzyme-like activity of the as-prepared nanosilvers, their biochemical properties including pH, thermal, light, and shelf stability were characterized to explore more precisely describing their nanozymatic behavior. The results of thermal and pH stability studies showed that the as-prepared nanosilvers reveal their maximal enzyme-like activity at a wide temperature range of 25 ℃–35 ℃ and a pH range of 3.5–4.5, in order. Regarding the light stability and shelf-life studies, the results exhibited that 75% and 96% of the enzyme-like activity of the as-prepared nanozymes was saved after 7 days exposing visible light and 10 days of storage at 4 ℃ under dark conditions, in order.
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by
Saeed Reza Hormozi Jangi
Micromat. Interf.
2023
,
1(1);
150 Views,
0 PDF Downloads
Abstract
Despite the well-known concepts on the intrinsic peroxidase-like activity of MnO 2 nanoparticles, up to date, their biochemical and kinetics characteristics were not investigated, especially, the current information about their performances toward n -electron oxidation of 3, 3′-diaminobezedine for producing indamine polymers is on limitation. Therefore, herein, the MnO 2 nanoparticles were synthesized by a simple low-cost co-precipitation method and then characterized by XRD, SEM, and DLS analysis. Besides, their peroxidase-like activity was evaluated upon standard peroxidase enzyme assay, revealing high intrinsic peroxidase-like activity for the as-mentioned MnO 2 nanozymes. Considering their high intrinsic peroxidase-like activity, their optimal biochemical characteristics were quantified by probing the progress of n -electron irreversible oxidation of 3, 3′-diaminobezedine in the presence of MnO 2 nanozymes as peroxidase mimics. The maximal activity of the as-mentioned MnO 2 nanoparticles with high intrinsic peroxidase-like activity was observed when the pH and temperature of the reaction media were fixed over 3.0–6.0 and 23 ℃–25 ℃, in order, revealing very high pH and thermal stability of the as-prepared nanoparticles. The salt stability of these nanoparticles was also checked using NaCl as model salt, revealing that the nanozymatic activity was stable over a salt concentration as high as 3–7 M. In addition, the affinity constant (K m ) and maximum velocity of the nanozyme-catalyzed oxidation of 3, 3′-diaminobezedine were found to be 1.6 mM and 47 nM sec − 1 , in turn.
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by
Chong Qiu
Micromat. Interf.
2023
,
1(1);
57 Views,
0 PDF Downloads
Abstract
N/A
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