Terahertz Wave Propagation in a Nanotube Conveying Fluid Taking into Account Surface Effect

In nanoscale structure sizes, the surface-to-bulk energy ratio is high and the surface effects must be taken into account. Surface effect plays a key role in accurately predicting the vibration behavior of nanostructures. In this paper, the wave behaviors of a single-walled carbon nanotube (CNT) conveying fluid are studied. The nonlocal Timoshenko beam theory is used and the surface effect is taken into account. It is found that the fluid can flow at a very high flow velocity and the wave propagates in the terahertz frequency range. The surface effects can significantly enhance the propagating frequency. This finding is different from the classical model where the surface effect is neglected.     

Response to pretransplant hypomethylating agents influences the outcome of allogeneic hematopoietic stem cell transplantation in adults with myelodysplastic syndromes

This study describes a retrospective analysis on the transplant outcome of 56 consecutive patients with myelodysplastic syndrome (MDS) according to their response to hypomethylating agents (HMA). While 2‐yr disease‐free survival (DFS) of patients who transformed to acute myeloid leukemia (n = 12) was 25%, that of the remaining patients with MDS according to response to HMA was 73.1%, 68.1%, 50.0%, and 20.8% in G‐COR (group of continuous response, n = 19), G‐NoC (group of no change, n = 15), G‐LOR (group of loss of response, n = 6), and G‐DP (group of disease progression, n = 4), respectively. When dichotomized as G‐COR/G‐NoC versus G‐LOR/G‐DP, significantly different 2‐yr DFS (71.0% vs. 33.3%; P = 0.004) and relapse (14.1% vs. 46.7%; P = 0.016) were demonstrated. On multivariate analysis, G‐LOR/G‐DP [hazard ratio (HR), 3.91; P = 0.008] and poor karyotype at transplantation (HR, 2.69; P = 0.017) were the significant predictors for poor DFS, as G‐LOR/G‐DP was for relapse (HR, 6.28; P = 0.011). DFS was significantly poor in patients with any of the two predictors in all MDS (81.5% vs. 34.9%; P = 0.001) or higher‐risk MDS (HrMDS) at the time of HMA (80.7% vs. 29.2%; P = 0.005). G‐COR showed a trend of better DFS compared with G‐NoC among HrMDS (74.6% vs. 36.5%; P = 0.090). These results implicate the significance of response to HMA on hematopoietic stem cell transplantation (HSCT) outcomes and support the need for future study to verify the suggested strategy of proceeding to transplantation before LOR or DP, especially for HrMDS.     

The Colletotrichum orbiculare species complex: Important pathogens of field crops and weeds

Colletotrichum orbiculare causes anthracnose of Cucurbitaceae and is phylogenetically closely related to pathogens of several other herbaceous hosts belonging to the Asteraceae, Fabaceae and Malvaceae. Most of them are known for their hemibiotrophic infection strategy and as destructive pathogens either of field crops or weeds. In order to study the phylogenetic relationships of these fungi, a multilocus analysis (ITS, GAPDH, CHS-1, HIS3, ACT, TUB2, GS) of 42 strains of C. orbiculare and related species was conducted. The analysis resulted in nine clades that confirmed the four species previously known as belonging to this species complex, C. lindemuthianum, C. malvarum, C. orbiculare and C. trifolii, and recognised four new species from weeds, namely C. bidentis, C. sidae, C. spinosum and C. tebeestii. The name C. orbiculare itself is widely used in plant pathology and science, but is invalid according to current nomenclatural rules. Therefore we described a new species with the same epithet and a type specimen that agrees with our current understanding of this species, and is linked to a living culture. Following the recent epitypification of C. lindemuthianum, we chose appropriate specimens with associated strains to serve as epitypes of C. malvarum and C. trifolii, and selected an authentic specimen of C. trifolii as lectotype.     

尿碘与甲状腺疾病的相关性

  目的   探究甲状腺疾病与尿碘等指标的相关性及甲状腺疾病发生的危险因素。   方法   以2018年1月至12月于昆明市第一人民医院甘美医院内分泌科体检和就诊的患者共266例，将其分为有甲状腺疾病组（207例）和非甲状腺疾病组（59例），并测定尿碘、促甲状腺激素（TSH）、游离三碘甲状腺原氨酸（FT3）、游离甲状素（FT4）、三碘甲状腺原氨酸（T3）、四碘甲状腺原氨酸（T4）、甲状腺过氧化物酶抗体（TPOAb）、甲状腺球蛋白抗体（TGAb）水平，应用彩色多普勒超声对研究对象的甲状腺进行检测。采用SPSS17.0软件进行t检验、秩和检验、χ2检验，甲状腺疾病的患病影响因素采用多因素Logistic回归分析。   结果   （1）甲状腺疾病组的尿碘水平中位数（143.30 μug/L）低于非甲状腺疾病组（178.30 μg/L），差异有统计学意义（P < 0.05）；（2）多因素Logistic回归分析结果显示，年龄（OR 1.140、95%CI:1.033-1.257、P = 0.009）、尿碘（OR 0.983、95%CI:0.971-0.996、P = 0.008）及TPOAb（OR 1.018、95%CI:0.979-1.059、P = 0.020）为甲状腺疾病的独立危险因素。   结论   低水平尿碘与甲状腺疾病的患病有关，尿碘、TPOAb和年龄是甲状腺疾病的独立危险因素。     

黑龙江省三家子村满族成人体部线性特征

目的:了解黑龙江省三家子村满族成人体部的线性特征,丰富我国少数民族体质数据.方法:按照人体测量方法,测量134名20～75岁的黑龙江省三家子村满族成人躯干、四肢部的23项线形指标,并计算5项体部指数分型值.结果:黑龙江省三家子村满族成人体部线性测量指标中,除了内踝下高外,其他指标男女之间均有统计学意义.男性以宽肩型、长躯干型、中骨盆型为主,女性以宽肩型、长躯干型、窄骨盆型为主,男性身高以中等型和高型为主,女性身高以矮型为主.黑龙江省满族成人与吉林省满族成人相比,黑龙江省满族成人较高；与辽宁汉族成人相比,两者没有明显差异.结论:黑龙江省满族成人体质具有肩宽、躯干长、骨盆偏窄的特点,身高与辽宁省汉族成人相近.