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Colossal permittivity in (Li + Nb) co-doped Fe2O3 ceramics
Fei Y.M.,Wang Q.Q.,Sun J.,Wang S.T.,Li T.Y.,Wang J.,Wang C.C. 한국물리학회 2020 Current Applied Physics Vol.20 No.7
(Li + Nb) co-doped (Li + Nb)xFe2-xO3 (with x = 0.0005, 0.005, 0.05, and 0.1) ceramics were prepared by solgel method. Their structural, dielectric, humidity, and magnetic properties were investigated. Colossal permittivity (~104) was approached or achieved in all doped samples even with a very small doping level of x = 0.0005. The colossal permittivity behavior is composed of two dielectric relaxations with the low-temperature one being a polaron relaxation due to electrons hopping between Fe3+ and Fe4+ ions and the hightemperature one being a Maxwell-Wagner relaxation caused by humidity-sensing properties.
Bernard M.Y. Cheung,Benjamin Or,Yue Fei,Man-Fung Tsoi 대한심장학회 2020 Korean Circulation Journal Vol.50 No.6
Hypertension is a common chronic disease affecting a large section of the general population. Hypertension is highly prevalent in the elderly because blood pressure (BP) rises with age. The risk of developing hypertension increases with predisposing genes, intrauterine growth retardation, prematurity and childhood obesity. BP is easier to control in the young. Non-pharmacological treatment through lifestyle changes, such as weight control and leisure-time physical activity, is more likely to be successful in young people. Hypertension in older adults is more difficult to control, requiring the use of more than one antihypertensive drug. Adverse effects and compliance become problematic. Much research is now directed at novel ways of controlling BP such as denervation. The change in definition of hypertension in the American guideline highlights the need to identify and manage hypertension early, at a stage when it is potentially reversible.
Association of SNP Haplotypes at the Myostatin Gene with Muscular Hypertrophy in Sheep
Gan, S.Q.,Du, Z.,Liu, S.R.,Yang, Y.L.,Shen, M.,Wang, X.H.,Yin, J.L.,Hu, X.X.,Fei, J.,Fan, J.J.,Wang, J.H.,He, Q.H.,Zhang, Y.S.,Li, N. Asian Australasian Association of Animal Productio 2008 Animal Bioscience Vol.21 No.7
The myostatin gene of seven important meat (Beltex (Australia), Beltex$\times$Huyang (F1), Meat and Multi-Prolific Chinese Merino Fine Wool, Meat Chinese Merino Fine Wool and Dorper (South Africa)) and non-meat (Huyang and Kazak) sheep breeds was analyzed to study the genetic basis of muscular hypertrophy (double muscling) phenotype in sheep. SNPs, four in regulatory regions and several in the introns in the myostatin gene, were identified, and the former four SNPs were used for further studies. Twelve haplotypes were predicted by PHASE program, of which four main haplotypes (1, 3, 7, 9) were present in 90% of the 364 sheep in the study. Haplotypes 1-4 were mainly present in meat breeds while haplotypes 7 and 9 dominated the non-meat breeds. The association between haplotypes and average daily gain (ADG) was analyzed among 116 sheep with production data, Haplo2 (CGAA) and Haplo8 (TGAA) were identified to have significant (p<0.05) effect on ADG by the model (JMP5.1 software) taking into account the effects of breed, family background, haplotype, birth weight and sex. ADG of these haplotype groups also correlated well (r = 0.82) with hypertrophic phenotype scores. In conclusion, the mutations -956 (T$\rightarrow$C), -41 (C$\rightarrow$A) and 6223 (G$\rightarrow$A) involved in Haplo2 and 8 may be associated with the double-muscling trait by influencing myostatin function and be suitable markers in selecting meat sheep.