Scaffold preparation

A tied independent scaffold consists of two rows of standards, with each row parallel to the building. The inner row is set as close to the building as is practicable. The distance between the lines of standards should be the minimum necessary to accommodate the required number of boards and toe boards.

91p chatraqn 03-04-2024 3 1   Download

Polylactic acid (PLA) microfibrous composite scaffolds having hydroxy apatite (HA) particles in the fibers were prepared by electrospinning of PLA and wet chemical hydrothermal reaction HA with average diameter of 8.13 µm. The fibers were compressed in mould into bulk scaffolds. Microscopy characterizations confirmed integration of the crystalline HA and PLA fibers in both before and after compression.

7p vimarillynhewson 02-01-2024 4 1   Download

SEM and TEM were used to evaluate the surface morphology and microstructure of the fiber membrane. Ultraviolet spectrophotometry was used to detect drug release. A LIVE/DEAD Viability/Cytotoxicity Kit and fluorescence staining were used to detect cell morphology and activity. Alkaline phosphatase and calcium mineralization deposition were used to evaluate the osteoinductive activity of the scaffold. Dynamic mechanical analysis was used to determine the Young’s modulus, maximum load, and maximum elongation of the prepared scaffold.

12p lyhuyenthu 31-01-2023 6 2   Download

Bacterial cellulose (BC) and silk fibroin (SF) are natural biopolymers successfully applied in tissue engineering and biomedical fields. In this work nanocomposites based on BC and SF were prepared and characterized by scanning electron microscopy (SEM), infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and thermogravimetric analysis (TGA).

11p vihermione 06-01-2023 6 3   Download

In this article, chitosan/biphasic calcium phosphate (CS/BCP) nanofibers were prepared by electrospinning. From the culture of osteogenic cells, the biocompatibility of CS/BCP nanofibrous substrates was identified and increased by the photocrosslinking.

7p visherylsandber 04-07-2022 9 2   Download

The biocomposite demonstrated upgraded swelling and antibacterial activity. The addition of ZnHAP accomplished the antibacterial activity. Biocompatibility studies were carried out using osteoblast cells and thus we proved the non-toxic nature of the biocomposite. Osteoblast cell adhesion investigations demonstrated that the cells were appended and infiltrated into the inside of the biocomposite.

5p meyerowitz 25-12-2021 5 0   Download

Cancer is one of the main global health problems. In order to develop novel antitumor agents, we synthesized 3,4-dihydropyrimidine-2(1H)-one (DHPM) and 2,6-diaryl-substituted pyridine derivatives as potential antitumor structures and evaluated their cytotoxic effects against several cancer cell lines. An easy and convenient method is reported for the synthesis of these derivatives, employing cobalt ferrite (CoFe 2 O4 @SiO2 -SO3 H) magnetic nanoparticles under microwave irradiation and solvent-free conditions.

20p tudichquannguyet 29-11-2021 7 1   Download

Artificially fabricated hydroxyapatite (HAP) shows excellent biocompatibility with various kinds of cells and tissues which makes it an ideal candidate for a bone substitute material. In this study, hydroxyapatite nanoparticles have been prepared by using the wet chemical precipitation method using calcium nitrate tetra-hydrate [Ca(NO3)2.4H2O] and di-ammonium hydrogen phosphate [(NH4)2HPO4] as precursors. The composite scaffolds have been prepared by a freeze-drying method with hydroxyapatite, chitosan, and gelatin which form a 3D network of interconnected pores.

17p tudichquannguyet 29-11-2021 11 1   Download

Polyethylene glycol (PEG) is a polymer that is widely used as a carrier for drug delivery systems (DDS). A library of N-PEGylated quinoline derivatives of PEG molecular weight 200 was prepared rapidly after the activation of PEGs using maleic anhydride. Quinoline with a polymer backbone is essential as new material. PEG is a water-soluble nonionic polymer approved by food and drug organizations for medicine applications. Because of its nontoxic grapheme, it is widely utilized in numerous biochemical, cosmetic, pharmaceutical, and industrialized applications.

20p tudichquannguyet 29-11-2021 12 1   Download

In this study, a fibrous bone tissue engineering scaffold was produced using poly(lactic-co-glycolic acid) (PLGA). Different concentrations (20%, 25%, and 30%) of PLGA (PLA:PGA 75:25) (Mw = 66,000–107,000) were wet spun using coagulation baths composed of different ratios (75:25, 60:40, 50:50) of isopropanol and distilled water. Scanning electron microscopy (SEM) and in vitro degradation studies were performed to characterize the fibrous PLGA scaffolds.

11p thiencuuchu 27-11-2021 5 1   Download

Suitable three-dimensional scaffolds showing controllable drug delivery properties, known as multifunctional scaffolds, have gained increasing interest for soft tissue engineering. Here, tetracycline hydrochloride-encapsulated polylactic acid (TCH-PLA) microparticles prepared by using the double emulsion/solvent evaporation method were incorporated into a gelatin matrix.

9p larachdumlanat129 14-01-2021 9 1   Download

The osteogenic capability of the scaffold is influenced by the interconnections between the scaffold pores which facilitate cell distribution, integration with the host tissue and capillary ingrowth. Hence, the preparation of bone scaffolds with applicable pore size and interconnectivity is a significant issue in bone tissue engineering

9p tamynhan4 06-09-2020 13 2   Download

A fast and facile one-pot procedure for the preparation of symmetric 5-Aryloyl-1,9-dimethyl-5,9-dihydro-2H-pyrano[2,3-d:6,5-d']dipyrimidine-2,4,6,8(1H,3H,7H)-tetraone derivatives by two-component reaction of N-methylbarbituric acid and arylglyoxalmonohydrates catalyzed by DABCO in ethanol at 50 ºC is described.

14p tocectocec 25-05-2020 9 1   Download

A combination of gel-casting and polymeric foam infiltration methods is used in this study to prepare porous bodies of hydroxyapatite (HA), to provide a better control over the microstructures of samples. These scaffolds were prepared by impregnating a body of porous polyurethane foam with slurry containing HA powder, and using a percentage of solids between 40% and 50% w/v, and three different types of monomers to provide a better performance.

8p kequaidan1 16-11-2019 8 0   Download

Preparing lessons before class is widely recognized as an effective means of increasing student motivation for classroom activities and learning outcome. However, the unclear status of lesson preparation generally discourages teachers and students from maintaining this effective learning strategy. This study applied the self-explanation theory and reading comprehension strategies to design a lesson warm-up mechanism that scaffolds knowledge building. A set of corresponding supporting tools were developed into a blog-based learning system (BBLS) to implement the warm-up process.

10p ketaucho 06-11-2019 23 1   Download

In the present study, alginate hydrogels modified with N-acetyl glucose amine (NAG) were prepared as wound-dressing material. Physical, chemical, thermal, and mechanical properties of the hydrogels were studied.

12p nutifooddau 27-01-2019 29 3   Download

Finally, a brief word about the team of writers is in order. Although we very much opted for a division of labour approach to the writing of this book, it has been no less of a team effort. The text was written by Mark Newson and the exercises prepared by Hordós Marianna, Szécsényi Krisztina, Pap Dániel, Tóth Gabriella and Vincze Veronika. Szécsényi Krisztina prepared the glossary. Most of the editing was carried out by Hordós Marianna, Nádasdi Péter, Szécsényi Krisztina and ...

0p commentcmnr 03-06-2013 71 3   Download

Hop up, Dick, love! See how glorious the sun is on the new snow. Now isn't that more beautiful than your dreams? And see the birdies! They can't find any breakfast. Let's hurry and have our morning wrestle and dress and give them some breakie before Anne calls." The mother is Ethel Baxter Lord. She is thirty-eight, and Dick-boy is just five. The mother's face is striking, striking as an example of fine chiseling of features, each line standing for sensitiveness, and each change revealing refinement of thought. The eyes and hair are richly brown.

87p hotmoingay9 02-02-2013 43 3   Download

Antibodies and their fragments are attractive binding proteins because their high binding strength is generated by several hypervariable loop regions, and because high-quality libraries can be prepared from the vast gene clus-ters expressed by mammalian lymphocytes. Recent explorations of new genome sequences and protein structures have revealed various small, nonantibody scaffold proteins.

9p mobifone23 21-01-2013 56 3   Download

From this table of the functional groups one recognizes that any transformation between columns must involve a redox process whereas transformations between rows can be accomplished by acid/base processes. It forms a scaffolding on to which we can hang our knowledge of reactivity, and at the same time it prepares us to think of yet unseen transformations on the basis of how those transformations might be effected.

22p cao_can 02-01-2013 42 2   Download