Influence of a N-Heterocyclic Core on the Binding Capability of N,O-Hybrid Diamide Ligands toward Trivalent Lanthanides and Actinides

2021 ◽  
Author(s):  
Ruixue Meng ◽  
Lei Xu ◽  
Xiao Yang ◽  
Mingze Sun ◽  
Chao Xu ◽  
...  
Keyword(s):  
Trivalent Lanthanides ◽  
Binding Capability ◽  
Diamide Ligands

Chelator-assisted high performance liquid chromatographic separation of trivalent lanthanides and actinides

2021 ◽  
Author(s):  
Roger M. Pallares ◽  
Solène Hébert ◽  
Manuel Sturzbecher-Hoehne ◽  
Rebecca J. Abergel
Keyword(s):  
Chromatographic Separation ◽  
High Performance ◽  
Chelating Agent ◽  
High Performance Liquid Chromatographic ◽  
Trivalent Lanthanides ◽  
Liquid Chromatographic Separation ◽  
Liquid Chromatographic ◽  
Trivalent Actinide

3,4,3-LI(1,2-HOPO) can be used as a HPLC chelating agent, promoting lanthanide and trivalent actinide separation without column modifications.

4-Hydroxyestradiol improves mouse embryo quality, epidermal growth factor-binding capability in vitro and implantation rates

2020 ◽  
Author(s):  
Nuria Hernández ◽  
Marta López-Morató ◽  
Mario J Perianes ◽  
Soledad Sánchez-Mateos ◽  
Vanessa Casas-Rua ◽  
...  
Keyword(s):  
Growth Factor ◽  
Epidermal Growth Factor ◽  
Embryo Quality ◽  
Culture Media ◽  
Embryo Implantation ◽  
In Vivo Models ◽  
Endometrial Cells ◽  
Epidermal Growth ◽  
Binding Capability

Abstract Embryo implantation in the uterus is a critical step to achieve success following ART. Despite favorable uterine conditions, a great number of good quality embryos fail to implant, often for reasons that are unknown. Hence, improving the implantation potential of embryos is a subject of great interest. 4-Hydroxyestradiol (4-OH-E2), a metabolic product of estradiol produced by endometrial cells, plays a key role in endometrial–embryonic interactions that are necessary for implantation. Nonetheless, the effects of 4-OH-E2 on embryos obtained in vitro have not been yet described. This study was designed to determine whether culture media enriched in 4-OH-E2 could improve the quality and implantation rate of embryos obtained in vitro, using both in vitro and in vivo models. We also analyzed its effects on the epidermal growth factor (EGF)-binding capability of the embryos. Our results showed that the presence of 4-OH-E2 in the culture media of embryos during the morula to blastocyst transition increases embryo quality and attachment to endometrial cells in vitro. 4-OH-E2 can also improve viable pregnancy rates of mouse embryos produced in vitro, reaching success rates that are similar to those from embryos obtained directly from the uterus. 4-OH-E2 improved the embryos’ ability to bind EGF, which could be responsible for the increased embryo implantation potential observed. Therefore, our results strongly suggest that 4-OH-E2 is a strong candidate molecule to supplement human IVF culture media in order to improve embryo implantation. However, further research is required before these findings can be translated with efficacy and safety to fertility clinics.

Thermal and spectroscopic studies on solid Ketoprofen of lighter trivalent lanthanides

2011 ◽  
Vol 108 (1) ◽  
pp. 371-379 ◽  
Author(s):  
D. A. Gálico ◽  
B. B. Holanda ◽  
G. L. Perpétuo ◽  
E. Schnitzler ◽  
O. Treu-Filho ◽  
...  
Keyword(s):  
Spectroscopic Studies ◽  
Trivalent Lanthanides ◽  
Thermal And Spectroscopic Studies

A-Pr2S3, D-Ho2S3 und E-Yb2S3:Synthese und Einkristallstrukturuntersuchungen / A-Pr2S3, D-Ho2S3 and E-Yb2S3:Synthesis and Single Crystal Structure Investigations

1996 ◽  
Vol 51 (5) ◽  
pp. 733-738 ◽  
Author(s):  
Thomas Schleid ◽  
Falk Lissner
Keyword(s):  
Crystal Structure ◽  
Crystal Growth ◽  
Single Crystals ◽  
Alkali Halides ◽  
Structural Investigations ◽  
Coordination Numbers ◽  
Trivalent Lanthanides ◽  
Trivalent Cations ◽  
Structure Investigations ◽  
Type Orthorhombic

The oxidation of reduced chlorides (MCl2) or chloride-hydrides (MClHx) of the lanthanides with sulfur (700-850 °C, 7 d, sealed tantalum capsules or evacuated silica vessels) usually results in the formation of the sesquisulfides M2S3 as the main products. In the presence of appropriate fluxes (e.g., alkali halides), the products often are obtained as single crystals, and the flux decides which modification is favoured. Ternary halides of the trivalent lanthanides with the corresponding alkali metal can mostly be found as the second components. Crystal growth and structural investigations of thus produced single crystals of Pr2S3 (from PrClH0.67 + S + NaCl, 5:5:1, A type: orthorhombic, Pnma (No. 62), Z = 4, a = 748.22(5), b = 405.51(3), c = 1560.74(9) pm, R = 0.024, Rw = 0.020), Ho2S3, (from U - Ho2S3, + KI, 1:1, D type: monoclinic, P21/m (No. 12), Z = 6, a = 1746.15(9), b = 400.23(3), c = 1012.43(6) pm, β = 98.529(4)°, R = 0.041, Rw = 0.035), and Yb2S3 (from T-Yb2S3 + KI, 1:1, E type: trigonal, R3̄c (No. 167), Z = 6, a = 674.97(2), c = 1820.11(9) pm, R = 0.019, Rw = 0.018) are reported here. In accordance with the lanthanide contraction, the trivalent cations (M3+) exhibit sulfur coordination numbers of 7 and 8 in A -Pr2S3, 6 and 7 in D -Ho2S3, and 6 in E -Yb2S3 (corundum-type structure).

scholarly journals Preparation of Self-supporting Bagasse Cellulose Nanofibrils Hydrogels Induced by Zinc Ions

Nanomaterials ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 800 ◽  
Author(s):  
Peng Lu ◽  
Ren Liu ◽  
Xin Liu ◽  
Min Wu
Keyword(s):  
Food Packaging ◽  
Cellulose Nanofibrils ◽  
Solvent Recovery ◽  
Zinc Ions ◽  
Cellulose Dissolution ◽  
Food Spoilage ◽  
Carboxylate Groups ◽  
Cellulose Hydrogel ◽  
Colorimetric Indicator ◽  
Binding Capability

Cellulose hydrogels are often prepared from native cellulose through a direct cellulose dissolution approach that often involves tedious process and solvent recovery problems. A self-supporting cellulose hydrogel was prepared by gelation of the TEMPO-oxidized bagasse cellulose nanofibrils (CNF) triggered by strong crosslinking between carboxylate groups and Zn2+. TEMPO process was used to generate negatively charged carboxylate groups on CNF surface to provide a high binding capability to Zn2+. Three TEMPO-oxidized CNFs of different carboxylate contents were prepared and characterized. TEM and AFM microscopes suggested that the sizes of CNFs were fined down and carboxylated cellulose nanofibrils (TOCNFs) of 5–10 nm wide, 200–500 nm long, and carboxylate contents 0.73–1.29 mmol/g were obtained. The final structures and compressive strength of hydrogels were primarily influenced by interfibril Zn2+-carboxylate interactions, following the order of TOCNFs concentration > content of carboxylate groups > concentration of zinc ions. A CO2 sensitive self-supporting cellulose hydrogel was developed as a colorimetric indicator of food spoilage for intelligent food packaging applications.

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