HYDROGEL MICROSPHERES BASED ON ENVIRONMENTALLY FRIENDLY POLYMERS WITH POTENTIAL BIOMEDICAL APPLICATIONS

2011 ◽  
Vol 10 (5) ◽  
pp. 717-727 ◽  
Author(s):  
Catalina A. Peptu ◽  
Alain Perichaud ◽  
Marcel Popa
2020 ◽  
Vol 8 (6) ◽  
pp. 1256-1265 ◽  
Author(s):  
Ana Barra ◽  
Zélia Alves ◽  
Nuno M. Ferreira ◽  
Manuel A. Martins ◽  
Helena Oliveira ◽  
...  

Sustainably made, flexible and biocompatible composites, having environmentally friendly compositions and multifunctional capabilities, are promising materials for several emerging biomedical applications.


Nanoscale ◽  
2017 ◽  
Vol 9 (39) ◽  
pp. 14758-14781 ◽  
Author(s):  
Yan Xue ◽  
Zihao Mou ◽  
Huining Xiao

Nanocellulose, extracted from the most abundant biomass material cellulose, has proved to be an environmentally friendly material with excellent mechanical performance, great biocompatibility and biodegradability, and has been used in a variety of biomedical applications.


2019 ◽  
Vol 21 (18) ◽  
pp. 4887-4918 ◽  
Author(s):  
Lang Ma ◽  
Mi Zhou ◽  
Chao He ◽  
Shuang Li ◽  
Xin Fan ◽  
...  

Environmentally friendly and biomimetic approaches to fabricate graphene-based advanced nanoplatforms and biocomposites for biomedical applications are summarized in this review.


Author(s):  
Yavuz Kaplan ◽  
Ahmet Cetin Can ◽  
Arzum Ulukoy

This study presents a low-cost and environmentally friendly medium for the pack boriding (boronizing) of a Ti6Al4V alloy. Titanium and its alloys are known to be highly reactive and to have extreme oxygen affinity. Therefore, boriding is performed under vacuum or in protective atmospheric conditions. This work evaluated the pack boriding heat treatments of a Ti6Al4V alloy under atmospheric conditions via the various boriding media used by previous researchers. In addition, a new pack boriding medium was developed by adding aluminum. Consequently, this study demonstrated that it is possible to obtain an undamaged titanium surface by applying solid-state boriding under atmospheric conditions.


2019 ◽  
Vol 20 (22) ◽  
pp. 5693 ◽  
Author(s):  
Sara B. Pereira ◽  
Aureliana Sousa ◽  
Marina Santos ◽  
Marco Araújo ◽  
Filipa Serôdio ◽  
...  

Biopolymers derived from polysaccharides are a sustainable and environmentally friendly alternative to the synthetic counterparts available in the market. Due to their distinctive properties, the cyanobacterial extracellular polymeric substances (EPS), mainly composed of heteropolysaccharides, emerge as a valid alternative to address several biotechnological and biomedical challenges. Nevertheless, biotechnological/biomedical applications based on cyanobacterial EPS have only recently started to emerge. For the successful exploitation of cyanobacterial EPS, it is important to strategically design the polymers, either by genetic engineering of the producing strains or by chemical modification of the polymers. This requires a better understanding of the EPS biosynthetic pathways and their relationship with central metabolism, as well as to exploit the available polymer functionalization chemistries. Considering all this, we provide an overview of the characteristics and biological activities of cyanobacterial EPS, discuss the challenges and opportunities to improve the amount and/or characteristics of the polymers, and report the most relevant advances on the use of cyanobacterial EPS as scaffolds, coatings, and vehicles for drug delivery.


Author(s):  
T. L. Hayes

Biomedical applications of the scanning electron microscope (SEM) have increased in number quite rapidly over the last several years. Studies have been made of cells, whole mount tissue, sectioned tissue, particles, human chromosomes, microorganisms, dental enamel and skeletal material. Many of the advantages of using this instrument for such investigations come from its ability to produce images that are high in information content. Information about the chemical make-up of the specimen, its electrical properties and its three dimensional architecture all may be represented in such images. Since the biological system is distinctive in its chemistry and often spatially scaled to the resolving power of the SEM, these images are particularly useful in biomedical research.In any form of microscopy there are two parameters that together determine the usefulness of the image. One parameter is the size of the volume being studied or resolving power of the instrument and the other is the amount of information about this volume that is displayed in the image. Both parameters are important in describing the performance of a microscope. The light microscope image, for example, is rich in information content (chemical, spatial, living specimen, etc.) but is very limited in resolving power.


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