http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Fertility of Holstein Cows in Chengdu, China
Zi, X.D.,Ma, L.,Zhou, G.Q.,Chen, C.L.,Wei, G.M. Asian Australasian Association of Animal Productio 2003 Animal Bioscience Vol.16 No.2
Data on the use of breeding records of dairy cattle farm of Fenghuang-shan in Chengdu areas during a period of six years is systematically analyzed. The results show that Holstein heifers have their 1st estrus at an average age of $513.6{\pm}46.7$ d which is not related to the calving season. Estrus mostly occurs in the months with mild ambient temperature (March, April, May, November and December). There is a very poor rate of estrus detection; only 30.0% successive estrus is observed within 24 d, 29.3% within 25-48 d, 40.6% over 48 d. The average number of insemination per conception is 1.50 for heifers and 1.74 for cows, but conception rate (CR) is lower in the relatively warm months (July, August and September) ranged from 48.1% to 51.9% compared with 58.1% to 68.5% in other months. High temperature is the most important factor affecting fertilization in warm months, but neither did CR decline immediately with the increased air temperature in June, nor did it increase immediately with the declined air temperature in September. Post partum anestrous period is $119.5{\pm}60.5$ d. The average interval from calving to conception is $159.4{\pm}85.6$ d with only 19.8% of the cows conceived within 85 d of calving. Cows with high milk yield have longer acyclic periods and lower conception rates. Improvement of efficient managements must be a precedent condition in Chengdu areas.
Ground-based Parallax Confirmed by<i>Spitzer</i>: Binary Microlensing Event MOA-2015-BLG-020
Wang, Tianshu,Zhu, Wei,Mao, Shude,Bond, I. A.,Gould, A.,Udalski, A.,Sumi, T.,Bozza, V.,Ranc, C.,Cassan, A.,Yee, J. C.,Han, C.,Abe, F.,Asakura, Y.,Barry, R.,Bennett, D. P.,Bhattacharya, A.,Donachie, M. American Astronomical Society 2017 The Astrophysical journal Vol.845 No.2
<P>We present the analysis of the binary gravitational microlensing event MOA-2015-BLG-020. The event has a fairly long timescale (similar to 63 days) and thus the light curve deviates significantly from the lensing model that is based on the rectilinear lens-source relative motion. This enables us to measure the microlensing parallax through the annual parallax effect. The microlensing parallax parameters constrained by the ground-based data are confirmed by the Spitzer observations through the satellite parallax method. By additionally measuring the angular Einstein radius from the analysis of the resolved caustic crossing, the physical parameters of the lens are determined. It is found that the binary lens is composed of two dwarf stars with masses M-1= 0.606 +/- 0.028M(circle dot) and M-2= 0.125 +/- 0.006 M-circle dot in the Galactic disk. Assuming that the source star is at the same distance as the bulge red clump stars, we find the lens is at a distance D-L = 2.44 +/- 0.10 kpc. We also provide a summary and short discussion of all of the published microlensing events in which the annual parallax effect is confirmed by other independent observations.</P>
Wei, D.,Huang, Y.,Kim, S.I.,Yu, Y.M.,Seo, H.J. North-Holland 2013 Materials letters Vol.99 No.-
A series of Eu<SUP>2+</SUP>-activated green-emitting phosphors, barium zinc silicate Ba<SUB>2</SUB>Zn<SUB>3</SUB>Si<SUB>3</SUB>O<SUB>11</SUB>:Eu<SUP>2+</SUP>, was first synthesized by chemical sol-gel method. The photoluminescence excitation and emission spectra, the concentration quenching of the phosphors, the luminescence color chromaticity and absolute quantum efficiency (QE), were measured. The results indicate that Ba<SUB>2</SUB>Zn<SUB>3</SUB>Si<SUB>3</SUB>O<SUB>11</SUB>:Eu<SUP>2+</SUP> phosphors can be efficiently excited by not only UV- but also blue-LED chips to realize novel green-emitting luminescence corresponding to the electric-dipole allowed 4f-5d transition of the Eu<SUP>2+</SUP> ions. Additionally, the luminescence was suggested to originate from two kinds of Eu<SUP>2+</SUP> centers in terms of photoluminescence properties. The energy transfer between the Eu<SUP>2+</SUP> centers was discussed by analyzing the photoluminescence spectra, concentration-dependent luminescence intensity and lifetimes. This is a potential candidate for the application to white LEDs because the tunable luminescence and small thermal quenching.
BLT2 phosphorylation at Thr<sup>355</sup> by Akt is necessary for BLT2-mediated chemotaxis
Wei, J.D.,Kim, J.Y.,Kim, J.H. North-Holland Pub ; Elsevier Science Ltd 2011 FEBS letters Vol.585 No.22
BLT2, a low-affinity leukotriene B<SUB>4</SUB> (LTB<SUB>4</SUB>) receptor, is a member of the G protein-coupled receptor family and is involved in multiple cellular responses, including chemotaxis. Despite its biological significance, the mechanisms of BLT2 regulation, especially by protein kinases, are poorly characterised. In this study, we found that Akt phosphorylates BLT2 at its C-terminal Thr<SUP>355</SUP> residue and that this event is critical for BLT2-mediated chemotactic responses. In addition, we found that Rac1 stimulation and subsequent reactive oxygen species (ROS) production lie downstream of BLT2 phosphorylation, thus mediating chemotaxis. Structured summary of protein interactions: BLT2physically interacts with Akt by pull down (View interaction) BLT2physically interacts with Akt by pull down (View interaction)
Wei, D.,Ji, J.,Song, D.,Li, M.,Cui, P.,Li, Y.,Mbengue, J.,Zhou, W.,Ning, Z.,Park, N. G. Royal Society of Chemistry 2017 Journal of Materials Chemistry A Vol.5 No.4
<P>The structure of the perovskite solar cells (PSCs) is either mesoporous or planar. Here, a novel structure for highly efficient and stable PSCs is proposed, i.e., an embedded structure, which combines the advantages of the mesoporous and planar structures. The embedded structure utilizes a TiO2 nanoparticle embedded perovskite (CH3NH3PbI3) film as the absorption layer. The presence of TiO2 nanoparticles in the perovskite film could improve the electron extraction, and promote the formation of a compact perovskite layer with large grains. Consequently, the performance of the PSCs is significantly improved with the efficiency increasing from 16.6% for the planar structure to 19.2% for the embedded structure, which is the best performance of the MAPbI(3)-based PSCs. Furthermore, the TiO2 embedded perovskite films present better long-term stability than the pristine perovskite films, and the corresponding PSCs, which have no other chemical modifications, also show excellent stability with efficiency approaching 80% (for average) or 90% (for the best) after being exposed to air for 28 days without encapsulation.</P>