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683276 occurrences (No.7 in the rank) during 5 years in the PubMed. [no cache] 500 found

193) Furthermore, we assessed the diffusion rates of fluorescent dextran molecules of different molecular weights in biomaterials by fluorescence recovery after photobleaching (FRAP) and observed that diffusion depended on both molecular size and gel concentration.

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PMID:23349072 DOI:10.1002/term.1654

2015 Journal of tissue engineering and regenerative medicine

* Monitoring nutrient transport in tissue-engineered grafts.

- Limited nutrient diffusion in three-dimensional (3D) constructs is a major concern in tissue engineering. Therefore, monitoring nutrient availability and diffusion within a scaffold is an important asset. Since nutrients come in various forms, we have investigated the diffusion of the oxygen, luciferin and dextran molecules within tissue-engineered constructs using optical imaging technologies. First, oxygen availability and diffusion were investigated, using transgenic cell lines in which a hypoxia-responsive element drives expression of the green fluorescent protein gene. Using confocal imaging, we observed oxygen limitation, starting at around 200 µm from the periphery in the context of agarose gel with 1 million CHO cells. Diffusion of luciferin was monitored real-time in agarose gels using a cell line in which the luciferase gene was driven by a constitutively active CMV promoter. Gel concentration affected the diffusion rate of luciferin. Furthermore, we assessed the diffusion rates of fluorescent dextran molecules of different molecular weights in biomaterials by fluorescence recovery after photobleaching (FRAP) and observed that diffusion depended on both molecular size and gel concentration. In conclusion, we have validated a set of efficient tools to investigate molecular diffusion of a range of molecules and to optimize biomaterials design in order to improve nutrient delivery.

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(1)21 from	(18)3 amounts	(35)2 compared	(52)2 origins
(2)15 types	(19)3 aspects	(36)2 dietary	(53)2 output
(3)10 between	(20)3 cell	(37)2 diseases	(54)2 pHs
(4)9 doses	(21)3 degrees	(38)2 dosing	(55)2 patterns
(5)7 concentrations	(22)3 effects	(39)2 ethnic	(56)2 perspectives
(6)6 time	(23)3 for	(40)2 flow	(57)2 protocols
(7)5 in	(24)3 health	(41)2 frequencies	(58)2 range
(8)5 levels	(25)3 mechanisms	(42)2 gene	(59)2 regions
(9)4 null	(26)3 parts	(43)2 genes	(60)2 scenarios
(10)4 areas	(27)3 roles	(44)2 genetic	(61)2 sensory
(11)4 combinations	(28)3 species	(45)2 human	(62)2 surface
(12)4 components	(29)3 ways	(46)2 indicators	(63)2 taxa
(13)4 groups	(30)2 abutments	(47)2 internal-cone	(64)2 than
(14)4 methods	(31)2 and	(48)2 laser	(65)2 therapeutic
(15)4 stages	(32)2 approaches	(49)2 masking	(66)2 tissues
(16)4 tilt	(33)2 bleaching	(50)2 materials	(67)2 versions
(17)3 adhesive	(34)2 changes	(51)2 molecular	(68)2 views

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--- WordNet output for different --- =>いろいろな, 違った, 異なった, 様々の, 種々の, 異なる, 変わった Overview of adj different The adj different has 5 senses (first 4 from tagged texts) 1. (88) different -- (unlike in nature or quality or form or degree; "took different approaches to the problem"; "came to a different conclusion"; "different parts of the country"; "on different sides of the issue"; "this meeting was different from the earlier one") 2. (41) different -- (distinctly separate from the first; "that's another (or different) issue altogether") 3. (2) different -- (differing from all others; not ordinary; "advertising that strives continually to be different"; "this new music is certainly different but I don't really like it") 4. (1) unlike, dissimilar, different -- (marked by dissimilarity; "for twins they are very unlike"; "people are profoundly different") 5. different -- (distinct or separate; "each interviewed different members of the community") --- WordNet end ---