4,087 research outputs found
Genetic polymorphisms in CYP1A1 and GSTM1 predispose humans to PCBs/PCDFs-induced skin lesions.
No full text
Transgenic tomato plants expressing an Arabidopsis thionin (Thi2.1) driven by fruit-inactive promoter battles against phytopathogenic attack.
No full textRecommended from our members
Influence of diluent alkyl substitution on the extraction of Am(III) and Eu(III) by a 6,6’-bis(1,2,4-triazin-3-yl)-2,2’-bipyridine ligand dissolved in alkylated cyclohexanone Diluents
Full text linkSeveral alkylated cyclohexanones were investigated as potential diluents for the selective extraction of Am(III) from Eu(III) from nitric acid solutions by the CyMe4-BTBP ligand. No significant extraction of either of the metal ions was observed for these diluents themselves. In the extractions from 1 M HNO3, 3-methylcyclohexanone and 4-methylcyclohexanone gave comparable results to cyclohexanone whereas in the extractions from 4 M HNO3, 2-methylcyclohexanone, 3-methylcyclohexanone and 4-methylcyclohexanone all gave superior results. For the monomethylated diluents, DAm and SFAm/Eu decreased in the order of alkyl substitution 2 > 4 ~ 3. However, alkyl substitution of cyclohexanone significantly slows down the extraction kinetics compared to cyclohexanone, and the position of alkyl substitution was found to play an important role in the solvents properties. 3-Methylcyclohexanone was identified as the most promising of the diluent
Recommended from our members
The separation of americium(III) from europium(III) by two new 6,6'-bistriazinyl-2,2'-bipyridines in different diluents
No full textThe synthesis and extraction of americium(III) and europium(III) from aqueous nitric acid solutions by the new BTBP ligands 6,6’-bis(5,5,7,7- tetramethyl-5,7-dihydrofuro[3,4-e]-1,2,4-triazin-3-yl)-2,2’-bipyridine (Cy5-O-Me4-BTBP), and 6,6’-bis(5,5,7,7-tetramethyl-5,7-dihydrothieno[3,4-e]-1,2,4-triazin-3-yl)- 2,2’-bipyridine (Cy5-S-Me4-BTBP) is described. The affinity for Am(III) and the
selectivity for Am(III) over Eu(III) of Cy5-S-Me4-BTBP were generally higher than for Cy5-O-Me4-BTBP. For both ligands, the extraction of Am(III) and Eu(III) from 3 M HNO3 into 3 mM organic solutions varied with the diluent used. The
highest distribution ratios and separation factors observed were in cyclohexanone and 2-methylcyclohexanone, respectively. For Cy5-S-Me4-BTBP, there is a strong
correlation between the distribution ratio for Am(III) and the permittivity of the diluent used. With 1-octanol as the diluent, low distribution ratios (D(Am) < 1) were observed for Cy5-S-Me4-BTBP although this ligand extracts Am(III) selectively (SFAm/Eu = 16-46 from 1-4 M HNO3). For Cy5-S-Me4-BTBP, Am(III) is extracted as the disolvate. The distribution ratios for Am(III), and the separation
factors for Am(III) over Eu(III) are both significantly higher for CyMe4-BTBP than they are for Cy5-O-Me4-BTBP and Cy5-S-Me4-BTBP in cyclohexanone. Changing the diluent from cyclohexanone to 2-methylcyclohexanone leads to a
decrease in D(Am) but an increase in SFAm/Eu for Cy5-S-Me4-BTBP
Synthesis and Photophysical Study of Luminescent Platinum(II) 2,6-Bis(N-dodecylbenzimidazol-2′-yl)pyridine Foldamers and Their Supramolecular Assembly and Metallogel Formation
No full textLuminescent dinuclear alkynylplatinum(II) metallofoldamers with an oligomeric m-phenyleneethynylene
backbone have been designed with the incorporation of a sterically undemanding and π-conjugated 2,6-bis(Ndodecylbenzimidazol-2′-yl)pyridine pincer ligand. The complex with the optimal chain length has been found to exhibit gelation behavior via stabilization by non-covalent Pt···Pt and π−π stacking interactions in the hierarchical architecture constructed from the single-turn helix. The chain lengths of the complexes have been found to be a critical determinant for their gelation behavior, conformations, and morphologies. Such a gelation process has been found to undergo a cooperative assembly mechanism. Their self-assembly via the Pt···Pt and π−π stacking interactions has been studied by 1H NMR, 2D ROESY NMR, electronic absorption and emission spectroscopy. Density functional theory calculations have provided further insights into the folded state geometry of this class of metallofoldamers.[1]
Acknowledgements Financial supports from the URC Strategic Research Theme on New Materials, the
University Grants Committee Areas of Excellence (AoE) Scheme (AoE/P-03/08), a General Research Fund (GRF) grant from the Research Grants Council of the Hong Kong Special Administrative Region, People’s Republic of China (HKU 17334216), and the National Basic Research Program of China (973 Program; 2013CB834701) are highly acknowledged.
Reference: [1] M. H.-Y. Chan, M. Ng, S. Y.-L. Leung, W. H. Lam, V. W.-W. Yam, J. Am. Chem. Soc., 2017, 139, 863
Managing symptoms in patients with advanced lung cancer during radiotherapy: results of a psychoeducational randomized controlled trial
No full textContext. Breathlessness, fatigue, and anxiety are distressing symptoms for patients with advanced lung cancer. Usually managed as isolated symptoms, theyoften can occur simultaneously. Previous research often has addressed management of discrete symptoms rather than considering them as a cluster, which, in reality, is the situation faced by patients.Objectives. This study aimed to examine the effectiveness of a psychoeducational intervention (PEI) on the symptom cluster of anxiety, breathlessness, and fatigue, compared with usual care.Methods. A pretest/post-test, two-group, randomized, controlled trial was conducted. Education on symptom management and coaching in the use of progressive muscle relaxation were delivered to patients one week prior tocommencing radiotherapy (RT), and repeated three weeks after beginning RT. Symptom data were collected at four time points: prior to the intervention, threeweeks, six weeks, and 12 weeks postintervention.Results. One hundred forty lung cancer patients receiving palliative RT were recruited from a publicly funded hospital in Hong Kong. Doubly multivariate analysis of variance revealed a significant difference (time ? group interaction effect, P ¼ 0.003) over time between the PEI and usual care control group on the pattern of change of the symptom cluster. Significant effects on the patterns ofchanges in breathlessness (P ¼ 0.002), fatigue (P ¼ 0.011), anxiety (P ¼ 0.001), and functional ability (P ¼ 0.000) also were found.Conclusion. PEI is a promising treatment for relieving the symptom cluster and each of the individually assessed symptoms. More effort needs to be directed a
Erythropoietin protects post-ischemic hearts by preventing extracellular matrix degradation: Role of Jak2-ERK pathway.
No full text- …
