Tan Hoang Vu Nguyen;Mohammad Tauquir Alam Shamim Shaikh;Ho Jung Jeon;Thi Thanh Huong Vu;Chowdam Venkata Prasad;Madani Labed;Sangmo Kim;You Seung Rim; 《Advanced Electronic Materials》2024,10(5):2300759

Biocompatible and biodegradable resistive random-access memory devices using Mg/agarose/Al2O3/Mg-based organic/inorganic structures are reported, showing nonvolatile bipolar resistive switching memory behavior. The organic/inorganic-based hybrid active layer has large working windows (≈106) and is highly stable up to 200 continuous sweeps. The device can be also tuned into multilevel memory by varying the compliance current from a few microamperes to several milliamperes. The formation of metallic filaments inside the active layer during SET and RESET stages using an X-ray photoelectron spectroscopy depth profile and magnesium (Mg) metallic ions that penetrate the agarose layer is confirmed. For the bioresorbable test in both deionized water and phosphate-buffered saline solution, the erasing time of whole devices can be adjusted by using an ultrathin ALD-grown Al2O3 film.  相似文献   

    

Lila Harkat-Madouri;Hanane Touati;Lila Boulekbache-Makhlouf;Khodir Madani;Hayate Haddadi-Guemghar; 《Journal of Food Processing and Preservation》2024,2025(1):3294168

Optimization by response surface methodology (RSM) and artificial neural networks (ANNs) was efficaciously applied to study the operating parameters of microwave-assisted extraction (MAE) in the recovery of total phenolic compounds (TPCs) from almond skins. These models were used to evaluate the effects of process variables and their interaction towards the attainment of their optimum conditions. A comparison of statistical parameters showed that ANN was more consistent (R2 = 0.99) than RSM (R2 = 0.97) to predict a TPC by MAE. Therefore, the following conditions were proposed: microwave power of 562 W, extraction time of 30 s, and ethanol concentration of 53%, corresponding to an optimal TPC yield of 560.79 mg gallic acid equivalents (GAEs)/100 g of dry weight (DW). The almond skin extract exhibited a high antioxidant activity tested by 1,1-diphenyl-picrylhydrazyl (DPPH) radical scavenging activity (IC50 = 5.39 ± 0.35 μg/mL), phosphomolybdate ammonium essay, hydroxyl radical scavenging activity (IC50042002mg/mL), and ability of chelating ferrous ions. The in vitro antihyperglycemic activity test revealed that the almond skin extract inhibits strongly α-amylase activity with IC50 = 27.87 μg/mL which was close to IC50 of the therapeutic drug acarbose (IC50 = 14.24 μg/mL).  相似文献   

    

Enrico Tosoratti  Dominic Rütsche  Maryam Asadikorayem  Simone Ponta  Philipp Fisch  Killian Flégeau  Thomas Linder  Pierre Guillon  Marcy Zenobi-Wong 《Advanced functional materials》2024,34(6):2305651

The creation of multi-tissue auricular transplants for the treatment of microtia is a challenge due to the complex and layered structure of this anatomical tissue. A novel casting technique for the 3D biofabrication of heterogeneous, multi-layered, and human-scale tissue transplants using eluting agarose molds is presented. The molds are generated by casting agarose into custom 3D-printed containers, termed metamolds, optimized to facilitate the hydrogel casting process based on geometric and topological constraints. Casting yields high resolution (50 µm) and allows for subsequent casting of further hydrogel layers on the transplant. Multi-layered auricular constructs are fabricated on a cartilage core consisting of a hyaluronic acid-alginate double network and an adjacent gelatin-based dermal layer. Bonding between adjacent layers is achieved by orthogonal physical and enzymatic crosslinking of residual functional groups between each layer. Material composition and culture duration are optimized for each layer allowing for maturation into cartilaginous and pre-vascularized dermal tissues. To demonstrate the scalability of this technique for the biofabrication of human-sized transplants, bi-layered human-sized ears are cast. Overall, this novel casting technique offers a promising approach for the fabrication of complex tissue grafts, overcoming the limitations of other traditional biofabrication methods.  相似文献   

    

Shahidul Alam  Haya Aldosari  Christopher E. Petoukhoff  Tomáš Váry  Wejdan Althobaiti  Maryam Alqurashi  Hua Tang  Jafar I. Khan  Vojtech Nádaždy  Peter Müller-Buschbaum  Gregory C. Welch  Frédéric Laquai 《Advanced functional materials》2024,34(6):2308076

Thermally induced degradation of organic photovoltaic devices hinders the commercialization of this emerging PV technology. Thus, a precise understanding of the origin of thermal device instability, as well as identifying strategies to circumvent degradation is of utmost importance. Here, it investigates thermally-induced degradation of state-of-the-art PBDB-T-2F (PM6):BTP (Y6) bulk heterojunction solar cells at different temperatures and reveal changes of their optical properties, photophysics, and morphology. The open-circuit voltage and fill factor of thermally degraded devices are limited by dissociation and charge collection efficiency differences, while the short-circuit current density is only slightly affected. Energy-resolved electrochemical impedance spectroscopy measurements reveal that thermally degraded samples exhibit a higher energy barrier for the charge-transfer state to charge-separated state conversion. Furthermore, the field dependence of charge generation, recombination, and extraction are studied by time-delayed collection field and transient photocurrent and photovoltage experiments, indicating significant bimolecular recombination limits device performance. Finally, coupled optical-electrical device simulations are conducted to fit the devices’ current-voltage characteristics, enabling us to find useful correlations between optical and electrical properties of the active layers and device performance parameters.  相似文献   

    

Asma Zafar;Ziaur Rahman;Attia Hamid;Fatima Sughra;Madood Makhdoom;Samreen Fatima;Haseeb Ahmed;Zeenat Mehmood;Maryam Khan;Muhammad Nauman Aftab; 《Journal of surfactants and detergents》2024,27(3):367-382

Present study concerned with expression and biochemical characterization of lipase enzyme for potential use in detergent formulation. Lipase gene (1242 bp) of Bacillus thuringensis was cloned and expressed in Escherichia coli BL21 strain using pET-21a(+) expression vector. Maximum expression of cloned lipase gene was obtained at 37°C with an induction of 0.4 mM IPTG (Isopropyl ß-D-1-thiogalactopyranoside) after 4 h of induction. Recombinant lipase was purified to homogeneity using immobilized metal ion affinity chromatography carrying 109.80 U/mg specific activity with 38.79 purification folds. Molecular mass of purified lipase was determined as 45 kDa using sodium dodecyl sulfate-polyacrylamide gel electrophoresis. Purified recombinant lipase showed stability up to 90°C and retained significant activity (52%) after 4 h at 90°C. It was also found to be stable at a wide range of pH and in the presence of higher concentrations of several inhibitors (sodium dodecyl sulfate, dimethylsulfoxide, sodium azide, β-mercaptoethanol, polysorbate 80, dithiothreitol) as well as organic solvents (acetone, methanol, ethanol, isopropanol, n-butanol). The activity of recombinant lipase was enhanced in the presence of various metal ions and activated up to 200% by Ca2+. The compatibility of recombinant lipase with commercial detergents and other additives as well as its broad substrate specificity endorse the potential application of this enzyme in detergent formulations.  相似文献   

    

Aishah Abdul Jalil  Yahya Gambo  Maryam Ibrahim  Abdulrahman Adam Abdulrasheed  Nurul Sahida Hassan  Mohd Ghazali Mohd Nawawi  Umi Aisah Asli  Mimi Haryani Hassim  Arshad Ahmad 《国际能源研究杂志》2019,43(9):4201-4216

A fibrous silica zeolite Y (HY@KCC‐1) catalyst with a high surface area of 568 m²/g and unique core‐shell morphology was successfully synthesized via a modified KCC‐1 synthesis method. Characterization of the catalysts was achieved with X‐ray powder diffraction (XRD), field emission scanning microscope (FESEM), N₂ adsorption/desorption, and 2,6‐dimethylpyridine adsorbed Fourier‐transform infrared spectroscopy (FTIR). The Pt/HY@KCC‐1 has displayed complete n‐dodecane conversion coupled with an incredibly enhanced isomer yield of 72% at 350°C, nearly two‐fold higher than that of unmodified Pt/HY catalyst. Remarkably, Pt/HY@KCC‐1 had an internal effectiveness factor (η) of unity and negligible internal diffusion limitation, thus suggesting its potential application in hydroisomerization of higher hydrocarbons for enhancing fuel properties.  相似文献   

    

Mohamed Shehata Draz  Maryam Moazeni  Manasa Venkataramani  Harini Lakshminarayanan  Ecem Saygili  Nivethitha Kota Lakshminaraasimulu  Kamyar Mehrabi Kochehbyoki  Manoj Kumar Kanakasabapathy  Shirin Shabahang  Anish Vasan  Mohamad Ali Bijarchi  Adnan Memic  Hadi Shafiee 《Advanced functional materials》2018,28(26)

A low‐cost and easy‐to‐fabricate microchip remains a key challenge for the development of true point‐of‐care (POC) diagnostics. Cellulose paper and plastic are thin, light, flexible, and abundant raw materials, which make them excellent substrates for mass production of POC devices. Herein, a hybrid paper–plastic microchip (PPMC) is developed, which can be used for both single and multiplexed detection of different targets, providing flexibility in the design and fabrication of the microchip. The developed PPMC with printed electronics is evaluated for sensitive and reliable detection of a broad range of targets, such as liver and colon cancer protein biomarkers, intact Zika virus, and human papillomavirus nucleic acid amplicons. The presented approach allows a highly specific detection of the tested targets with detection limits as low as 10² ng mL^?1 for protein biomarkers, 10³ particle per milliliter for virus particles, and 10² copies per microliter for a target nucleic acid. This approach can potentially be considered for the development of inexpensive and stable POC microchip diagnostics and is suitable for the detection of a wide range of microbial infections and cancer biomarkers.  相似文献   

  总被引：1，自引：0，他引：1  

Karim Rocky‐Salimi  Maryam Hashemi  Mohammad Safari  Maryam Mousivand 《Journal of the science of food and agriculture》2017,97(1):222-229

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Amin Mirshekari  Babak Madani  John B Golding 《Journal of the science of food and agriculture》2017,97(11):3706-3711

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John H. Gruenewald  Jungho Kim  Heung Sik Kim  Jared M. Johnson  Jinwoo Hwang  Maryam Souri  Jasminka Terzic  Seo Hyoung Chang  Ayman Said  Joseph W. Brill  Gang Cao  Hae‐Young Kee  Sung S. Ambrose Seo 《Advanced materials (Deerfield Beach, Fla.)》2017,29(1)

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