scholarly journals Biological Effects of the Novel Mulberry Surface Characterized by Micro/Nanopores and Plasma-Based Graphene Oxide Deposition on Titanium

2021 ◽  
Vol Volume 16 ◽  
pp. 7307-7317
Author(s):  
Hee-Seon Kim ◽  
Min-Kyung Ji ◽  
Woo-Hyung Jang ◽  
Khurshed Alam ◽  
Hyun-Seung Kim ◽  
...  
2021 ◽  
Author(s):  
Gopal Avashthi ◽  
Man Singh

Ultrasonochemically driven graphene oxide (GrO) functionalization (f) with Sulfanilamide (SA) near-edge catalyzed heterogeneous graphene oxide (h-GrO) as economic scalable f-(SA)GrO is reported. The novel in-situ H2O association was subsequently aligned...


2021 ◽  
Vol 117 ◽  
pp. 111138
Author(s):  
Y. Azlina ◽  
M.N. Azlan ◽  
S.S. Hajer ◽  
M.K. Halimah ◽  
A.B. Suriani ◽  
...  

Nanomaterials ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 614 ◽  
Author(s):  
Roxana Noriega-Navarro ◽  
Jésica Castro-Medina ◽  
Martha V. Escárcega-Bobadilla ◽  
Gustavo A. Zelada-Guillén

Polymer-grafted nanomaterials based on carbon allotropes and their derivatives (graphene oxide (GO), etc.) are typically prepared by successive reaction stages that depend upon the initial functionalities in the nanostructure and the polymerization type needed for grafting. However, due to the multiple variables involved in the functionalization steps, it is commonly difficult to predict the properties in the final product and to correlate the material history with its final performance. In this work, we explored the steps needed to graft the carboxylic acid moieties in GO (COOH@GO) with a pH-sensitive polymer, poly[2-(diethylamino)ethyl methacrylate] (poly[DEAEMA]), varying the reactant ratios at each stage prior to polymerization. We studied the combinatorial relationship between these variables and the behavior of the novel grafted material GO-g-poly[DEAEMA], in terms of swelling ratio vs. pH (%Q) in solid specimens and potentiometric response vs. Log[H+] in a solid-state sensor format. We first introduced N-hydroxysuccinimide (NHS)-ester moieties at the –COOH groups (GO-g-NHS) by a classical activation with N-ethyl-N′-(3-dimethylaminopropyl)carbodiimide (EDC). Then, we substituted the NHS-ester groups by polymerizable amide-linked acrylic moieties using 2-aminoethyl methacrylate (AEMA) at different ratios to finally introduce the polymer chains via radical polymerization in an excess of DEAEMA monomer. We found correlated trends in swelling pH range, interval of maximum and minimum swelling values, response in potentiometry and potentiometric linear range vs. Log[H+] and could establish their relationship with the combinatorial stoichiometries in synthetic stages.


Author(s):  
Alexander Halim ◽  
Qing Luo ◽  
Yang Ju ◽  
Guanbin Song

Stem cells are undifferentiated cells which can give rise to any types of cells in our body. Hence, they have been utilized for various applications such as drug testing and disease modeling. However, for the successful of those applications, the survival and differentiation of stem cells into specialized lineages should be well controlled. Growth factors and chemical agents are the most common signals to promote the proliferation and differentiation of stem cells. However, those approaches holds several drawbacks such as the negative side effects, degradation or denaturation, and expensive. To address such limitations, nanomaterials have been recently used as a better approach for controlling stem cells behaviors. Graphene oxide is the derivative of graphene, the first 2D materials in the world. Recently, due to its extraordinary properties and great biological effects on stem cells, many scientists around the world have utilized graphene oxide to enhance the differentiation potential of stem cells. In this mini review, we highlight the key advances about the effects of graphene oxide on controlling stem cell growth and various types of stem cell differentiation. We also discuss the possible molecular mechanisms of graphene oxide in controlling stem cell growth and differentiation.


Nanomaterials ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 736 ◽  
Author(s):  
Alexander Halim ◽  
Qing Luo ◽  
Yang Ju ◽  
Guanbin Song

Stem cells are undifferentiated cells that can give rise to any types of cells in our body. Hence, they have been utilized for various applications, such as drug testing and disease modeling. However, for the successful of those applications, the survival and differentiation of stem cells into specialized lineages should be well controlled. Growth factors and chemical agents are the most common signals to promote the proliferation and differentiation of stem cells. However, those approaches holds several drawbacks such as the negative side effects, degradation or denaturation, and expensive. To address such limitations, nanomaterials have been recently used as a better approach for controlling stem cells behaviors. Graphene oxide is the derivative of graphene, the first two-dimensional (2D) materials in the world. Recently, due to its extraordinary properties and great biological effects on stem cells, many scientists around the world have utilized graphene oxide to enhance the differentiation potential of stem cells. In this mini review, we highlight the key advances about the effects of graphene oxide on controlling stem cell growth and various types of stem cell differentiation. We also discuss the possible molecular mechanisms of graphene oxide in controlling stem cell growth and differentiation.


2020 ◽  
Vol 46 (10) ◽  
pp. 14828-14839 ◽  
Author(s):  
Hyeonho Cho ◽  
Seok-min Kim ◽  
Hong Liang ◽  
Sunghan Kim

2015 ◽  
Vol 5 (2) ◽  
pp. 827-829 ◽  
Author(s):  
Zeyu Guo ◽  
Zheng-Hong Huang ◽  
Mingxi Wang ◽  
Feiyu Kang

The novel structure of composite CNFs was preparedviaembedding reduced graphene oxide sheets for oxidation of NO at room temperature.


2017 ◽  
Vol 41 (2) ◽  
pp. 865-872 ◽  
Author(s):  
Xiang Liu ◽  
Xiaohua Zhao ◽  
Yuanyuan Cao ◽  
Ting Li ◽  
Shu Qiu ◽  
...  

The novel catalyst (3D-NrGO/Pd) exhibited promising catalytic activity and stability for use in Suzuki reactions.


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