scholarly journals Controlled Synthesis of Water-Soluble NaYF4:Yb3+, Er3+Nanoparticles with Surfactant Dependent Properties

2014 ◽  
Vol 2014 ◽  
pp. 1-7
Author(s):  
Junwei Zhao ◽  
Tiekun Jia ◽  
Xiaofeng Wang ◽  
Xianggui Kong
Keyword(s):  
Molecular Weight ◽  
Upconversion Luminescence ◽  
Excitation Power ◽  
Water Soluble ◽  
Solvothermal Reaction ◽  
Low Molecular Weight ◽  
Controlled Synthesis ◽  
Mixed Solution ◽  
Branched Polyethylenimine ◽  
Chain Lengths

Water-soluble NaYF4:Yb3+, Er3+nanoparticles (NPs) are successfully prepared by a solvothermal reaction using branched polyethylenimine (PEI) with different chain lengths as the surfactants in a water/diethylene glycol (DEG) mixed solution. It is shown that the size of NaYF4NPs prepared with high molecular weight PEI (HPEI) is smaller than that of the NPs prepared with low molecular weight (LPEI), while small-sized NPs exhibit more intense upconversion luminescence intensities than large-sized NPs in the same excitation power of 980 nm. It is found that HPEI is conducive to the formation of smaller NP with high crystallinity. Small-sized NaYF4:Yb3+, Er3+NPs with intense upconversion luminescence and improved crystallinity were related to their growth process. A possible growth mechanism of the samples is proposed. The results of this study can provide new insights into the controlled synthesis of novel NPs.

Low Molecular Weight Branched Polyethylenimine-Graft-Lentinan as a Novel Synthetic Gene Carrier

2013 ◽  
Vol 815 ◽  
pp. 293-298
Author(s):  
Li Jing Min ◽  
Jing Fen Li
Keyword(s):  
Molecular Weight ◽  
Gel Electrophoresis ◽  
Transfection Efficiency ◽  
Gene Transfection ◽  
Water Soluble ◽  
Low Molecular Weight ◽  
Dna Migration ◽  
Branched Polyethylenimine ◽  
Soluble Polysaccharide

LMW Branched Polyethylenimine-graft-lentinan was synthesized by performing crosslinker CDI in the presence of water-soluble Polysaccharide (Mw 70,000) and polyethylenimine (PEI, Mw 600). The chemistry of the PEI-g-lentinan obtained were characterized. The results indicated that the amines of lentinan were grafted with PEI. Gel electrophoresis showed that DNA migration was retarded completely at a N/P ratio of 10/1, indicating good DNA condensation capability of PEI-g-lentinan. The cytotoxicity of PEI-g-lentinan was evaluated, and the results reflected that PEI-g-lentinan had a lower cytotoxicity than PEI (25 K). Gene transfection efficiency of PEI-g-chitosan in cos-7 cells was determined. Remarkably,PEI-g-lentinan showed a higher transfection efficiency than that of PEI (25 K) in vitro.

ANALISA KANDUNGAN BETA-GLUKAN LARUT AIR DAN LARUT ALKALI DARI TUBUH BUAH JAMUR TIRAM (Pleurotus ostreatus) DAN SHIITAKE (Lentinus edodes)

2013 ◽  
Vol 13 (3) ◽  
Author(s):  
Netty Widyastuti ◽  
Teguh Baruji ◽  
Henky Isnawan ◽  
Priyo Wahyudi ◽  
Donowati Donowati
Keyword(s):  
Molecular Structure ◽  
Molecular Weight ◽  
Immune System ◽  
Pleurotus Ostreatus ◽  
Water Soluble ◽  
Low Molecular Weight ◽  
Lentinus Edodes ◽  
Beta Glucan ◽  
Oyster Mushrooms ◽  
The Difference

Beta glucan is a polysaccharide compound, generally not soluble inwater and resistant to acid. Beta glucan is used as an immunomodulator (enhancing the immune system) in mammals is usually a beta-glucan soluble in water, easily absorbed and has a low molecular weight. Several example of beta-glucan such as cellulose (β-1 ,4-glucan), lentinan (β-1 0.6-glucan) and (β-1 ,3-glucan), pleuran (β-1, 6 and β-1 ,3-glucan) are isolated from species of fungi Basidiomycota include mushrooms (Pleurotus ostreatus) and shiitake (Lentinus edodes).The purpose of thisresearch activity is to obtain beta-glucan compound that can be dissolved in water and in alkali derived from fungi Basidiomycota, i.e, Oyster mushrooms (Pleurotus ostreatus) and shiitake (Lentinus edodes). The result of beta-glucan compared to characterize the resulting beta glucan that is molecular structure . The difference of beta glucan extraction is based on the differences in solubility of beta-glucan. Beta glucan could be water soluble and insoluble water.

scholarly journals Facile construction of a family of supramolecular gels with good levofloxacin hydrochloride loading capacity

RSC Advances ◽  
2021 ◽  
Vol 11 (21) ◽  
pp. 12641-12648
Author(s):  
Renyuan Chen ◽  
Caidie Xu ◽  
Yihao Lei ◽  
Hongxin Liu ◽  
Yabin Zhu ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Alkyl Chain ◽  
Low Molecular Weight ◽  
Loading Capacity ◽  
Supramolecular Gels ◽  
Low Molecular Weight Gelators ◽  
Chain Lengths

A family of low molecular weight gelators with different alkyl chain lengths was constructed, having excellent gelation ability and antibiotic loading capacity. A low molecular weight hydrogelator was obtained by adjusting the length of alkyl chain.

scholarly journals Water-soluble low-molecular-weight cellulose chains radially oriented on gold nanoparticles

Cellulose ◽  
2011 ◽  
Vol 18 (4) ◽  
pp. 929-936 ◽  
Author(s):  
Yukiko Enomoto-Rogers ◽  
Hiroshi Kamitakahara ◽  
Arata Yoshinaga ◽  
Toshiyuki Takano
Keyword(s):  
Molecular Weight ◽  
Gold Nanoparticles ◽  
Water Soluble ◽  
Low Molecular Weight

Co-liposomes of redox-active alkyl-ferrocene modified low MW branched PEI and DOPE for efficacious gene delivery in serum

2015 ◽  
Vol 3 (11) ◽  
pp. 2318-2330 ◽  
Author(s):  
Krishan Kumar ◽  
Gururaja Vulugundam ◽  
Paturu Kondaiah ◽  
Santanu Bhattacharya
Keyword(s):  
Molecular Weight ◽  
Gene Delivery ◽  
Low Molecular Weight ◽  
Redox Active ◽  
Branched Polyethylenimine

Ferrocenylated lipopolymers based on low molecular weight, branched polyethylenimine (BPEI 800 Da) for redox controlled gene delivery.

Controlled synthesis of low-molecular-weight polyethylene waxes by titanium–biphenolate–ethylaluminum sesquichloride based catalyst systems

2007 ◽  
Vol 104 (3) ◽  
pp. 1531-1539 ◽  
Author(s):  
Prashant S. Umare ◽  
Karumanchi Rao ◽  
Gopal L. Tembe ◽  
Deepa A. Dhoble ◽  
Bhavna Trivedi
Keyword(s):  
Molecular Weight ◽  
Low Molecular Weight ◽  
Controlled Synthesis ◽  
Catalyst Systems

Water-soluble low-molecular-weight organic acids in automorphic loamy soils of the tundra and taiga zones

2013 ◽  
Vol 46 (6) ◽  
pp. 654-659 ◽  
Author(s):  
E. V. Shamrikova ◽  
I. V. Gruzdev ◽  
V. V. Punegov ◽  
F. M. Khabibullina ◽  
O. S. Kubik
Keyword(s):  
Molecular Weight ◽  
Organic Acids ◽  
Water Soluble ◽  
Low Molecular Weight
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