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Wang, Feige,Wu, Xue-Bing,Fan, Xiaohui,Yang, Jinyi,Cai, Zheng,Yi, Weimin,Zuo, Wenwen,Wang, Ran,McGreer, Ian D.,Ho, Luis C.,Kim, Minjin,Yang, Qian,Bian, Fuyan,Jiang, Linhua IOP Publishing 2015 ASTROPHYSICAL JOURNAL LETTERS - Vol.807 No.1
<P>We report the discovery of an ultra-luminous quasar J030642.51+185315.8 (hereafter J0306+1853) at redshift 5.363, which hosts a supermassive black hole with M-BH = (1.07 +/- 0.27) x 10(10) M-circle dot. With an absolute magnitude M-1450 = -28.92 and a bolometric luminosity L-bol similar to 3.4 x 10(14) L-circle dot, J0306+1853 is one of the most luminous objects in the early universe. It is not likely to be a beamed source based on its small flux variability, low radio loudness, and normal broad emission lines. In addition, a z = 4.986 damped Ly alpha system (DLA) with [M/H] = -1.3 +/- 0.1, among the most metal-rich DLAs at z greater than or similar to 5, is detected in the absorption spectrum of this quasar. This ultra-luminous quasar puts strong constraints on the bright end of the quasar luminosity function and massive end of the black hole mass function. It will provide a unique laboratory for the study of BH growth and the co-evolution between a BH and the host galaxy with multi-wavelength follow-up observations. The future high-resolution spectra will give more insight into the DLA and other absorption systems along the line of sight of J0306+1853.</P>
Xiaohui Xi,Jinliang Wang,Liqing Chen,Zhaodong Wang 대한금속·재료학회 2019 METALS AND MATERIALS International Vol.25 No.6
In this paper, a process of two-step intercritical heat treatment was used to control the amount of retained austenite andnano-scaled precipitates for a low carbon Cu-containing structural steel such that the mechanical properties of this steelcan be tailored. In this process, the first step is intercritical annealing and a mixed microstructure can be obtained whichcontains intercritical ferrite, tempered martensite, fresh martensite and a small amount of retained austenite. The subsequentintercritical tempering was introduced to be beneficial for producing more stable retained austenite at room temperaturethrough secondary enrichment of stabilizers (Mn, Ni). Also, (Nb, V, Mo) (C, N) precipitates were formed during intercriticalannealing, while smaller (Nb, V, Mo) (C, N) precipitates and Cu-rich particles with diameter of 5–15 nm were obtainedafter intercritical tempering. It is due to the contributions from multi-phase microstructure, strain-induced transformation ofstable retained austenite and strengthening of nano-scaled precipitates that a combination of high strength, good ductility,low yield to tensile ratio (Y/T ratio) and excellent low-temperature toughness was achieved. The strengthening and tougheningmechanism were discussed on the basis of retained austenite formation and interaction between Cu precipitates and thematrix, together with the crack propagation.
Improving Mycoplasma ovipneumoniae culture medium by a comparative transcriptome method
Xiaohui Wang,Wenguang Zhang,Yongqing Hao 대한수의학회 2020 Journal of Veterinary Science Vol.21 No.2
Mycoplasma ovipneumoniae (Mo) is difficult to culture, resulting in many difficulties in related research and application. Since nucleotide metabolism is a basic metabolism affects growth, this study conducted a “point-to-point” comparison of the corresponding growth phases between the Mo NM151 strain and the Mycoplasma mycoides subsp. capri (Mmc) PG3 strain. The results showed that the largest difference in nucleotide metabolism was found in the stationary phase. Nucleotide synthesis in PG3 was mostly de novo, while nucleotide synthesis in NM151 was primarily based on salvage synthesis. Compared with PG3, the missing reactions of NM151 referred to the synthesis of deoxythymine monophosphate. We proposed and validated a culture medium with added serine to fill this gap and prolong the stationary phase of NM151. This solved the problem of the fast death of Mo, which is significant for related research and application.
Bond strength modeling for corroded reinforcement in reinforced concrete
Wang, Xiaohui,Liu, Xila Techno-Press 2004 Structural Engineering and Mechanics, An Int'l Jou Vol.17 No.6
Steel corrosion in reinforced concrete structures leads to concrete cover cracking, reduction of bond strength, and reduction of steel cross section. Among theses consequences mentioned, reduction of bond strength between reinforcement and concrete is of great importance to study the behaviour of RC members with corroded reinforcement. In this paper, firstly, an analytical model based on smeared cracking and average stress-strain relationship of concrete in tension is proposed to evaluate the maximum bursting pressure development in the cover concrete for noncorroded bar. Secondly, the internal pressure caused by the expansion of the corrosion products is evaluated by treating the cracked concrete as an orthotropic material. Finally, bond strength for corroded reinforcing bar is calculated and compared with test results.
Electroconvulsive Therapy on Severe Obsessive-Compulsive Disorder Comorbid Depressive Symptoms
Xiaohui Liu,Xinhui Xie,Hong Cui,Qiang Wei,Ying Wang,Keyong Wang,Chen Wang,Chunyan Zhu 대한신경정신의학회 2014 PSYCHIATRY INVESTIGATION Vol.11 No.2
Electroconvulsive therapy (ECT) is not currently used as a first-line treatment for obsessive-compulsive disorder (OCD). However, several related case reports have demonstrated that ECT seems to be effective for severe OCD, especially when first-line therapies have failed. In this study, we describe the courses, detailed parameters, effects, and follow-up information relating to three patients with severe OCD who were treated by modified bifrontal ECT after their first-line anti-OCD treatments pharmacotherapy, behavioral therapy, and cognitive behavioral therapy failed. The number of ECT procedures administered in each case is as follows: Case 1, eight; Case 2, three; and Case 3, four. In all three cases, the patients’ depressive symptoms improved considerably after the ECT procedures. In addition, the condition of all three patients’ OCD significantly improved and remained stable at regular follow-ups. ECT may play an effective role in treating severe OCD.
Electroconvulsive Therapy on Severe Obsessive-Compulsive Disorder Comorbid Depressive Symptoms
Xiaohui Liu,Hong Cui,Qiang Wei,Ying Wang,Keyong Wang,Chen Wang,Chunyan Zhu,Xinhui Xie 대한신경정신의학회 2004 PSYCHIATRY INVESTIGATION Vol.1 No.2
Electroconvulsive therapy (ECT) is not currently used as a first-line treatment for obsessive-compulsive disorder (OCD). However, several related case reports have demonstrated that ECT seems to be effective for severe OCD, especially when first-line therapies have failed. In this study, we describe the courses, detailed parameters, effects, and follow-up information relating to three patients with severe OCD who were treated by modified bifrontal ECT after their first-line anti-OCD treatments pharmacotherapy, behavioral therapy, and cognitive behavioral therapy failed. The number of ECT procedures administered in each case is as follows: Case 1, eight; Case 2, three; and Case 3, four. In all three cases, the patients’ depressive symptoms improved considerably after the ECT procedures. In addition, the condition of all three patients’ OCD significantly improved and remained stable at regular follow-ups. ECT may play an effective role in treating severe OCD.