mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Effects of restrictions on maternal feed intake on the immune indexes of umbilical cord blood and liver Toll-like receptor signaling pathways in fetal goats during pregnancy

Background: Liver has important immune function during fetal development and after birth. However, the effect of maternal malnutrition on immune function of the fetal liver is rarely reported. In this study, twelve pregnant goats(Xiangdong black goat, at d 45 of gestation) were assigned to the control group(fed 100% of nutritional requirements) and the restriction group(fed 60% of the intake of the control group) during gestation from d 55 to 100. Fetal goats were harvested at d 100 of gestation and immune indexes and amino acid profiles of the umbilical cord blood and liver Toll-like receptors(TLRs) signaling pathways were measured. Results: Maternal body weight in the restriction group was lower than the control group(P < 0.05). Maternal feed intake restriction decreased(P < 0.05) heart weight, heart index, alkaline phosphatase and serum amyloid protein A in the umbilical cord blood(UCB). Moreover, only histidine was decreased in the restricted group(P = 0.084), and there were no differences in other amino acids contents in the UCB between the two groups(P > 0.05). The TLR2 and TLR4 mRNA expression in the fetal liver in the restriction group was greater(P < 0.05) than that in the control group. Furthermore, the mRNA expression levels of myeloid differentiation primary response 88(MyD88), TNF receptor associated factor 6, nuclear factor kappa B subunit 1, NFKB inhibitor alpha, IFN-β, TGF-β, TNF-α and IL-1β in the restricted group were upregulated(P < 0.05), and the expression of TLR3(P = 0.099) tended to be higher in the restricted group. However, protein levels of TLR2, TLR4, IκBα, phosphorylated IκBα, phosphorylated IκBα/total IκBα, TRIF and MyD88 were not affected(P > 0.05) by maternal intake restriction. Conclusions: These results revealed that the restriction of maternal feed intake influenced the development of heart and hepatic protein synthesis at the acute phase of fetal goats and upregulated the mRNA expression of genes involved in MyD88-dependent signaling pathways and of target cytokines.
Antigenicity of tissues and organs from GGTA1/CMAH/ β4GalNT2 triple gene knockout pigs

Clinical xenotransplantations have been hampered by human preformed antibody-mediated damage of the xenografts. To overcome biological incompatibility between pigs and humans, one strategy is to remove the major antigens [Gal, Neu5Gc, and Sd(a)] present on pig cells and tissues. Triple gene(GGTA1, CMAH, and β4GalNT2) knockout(TKO) pigs were produced in our laboratory by CRISPR-Cas9 targeting. To investigate the antigenicity reduction in the TKO pigs, the expression levels of these three xenoantigens in the cornea, heart, liver, spleen, lung, kidney, and pancreas tissues were examined. The level of human IgG/IgM binding to those tissues was also investigated, with wildtype pig tissues as control. The results showed that αGal,Neu5Gc, and Sd(a) were markedly positive in all the examined tissues in wildtype pigs but barely detected in TKO pigs. Compared to wildtype pigs, the liver, spleen, and pancreas of TKO pigs showed comparable levels of human IgG and IgM binding, whereas corneas, heart, lung, and kidney of TKO pigs exhibited significantly reduced human IgG and IgM binding. These results indicate that the antigenicity of TKO pig is significantly reduced and the remaining xenoantigens on porcine tissues can be eliminated via a gene targeting approach.
肝血管瘤诊断和治疗多学科专家共识(2019版)

成人肝血管瘤是最常见的肝脏良性肿瘤。随着人群健康体检的普及和影像学检查手段的进步,其检出率日益增多,致使愈来愈多的肝血管瘤病人需要诊断与治疗。近年来,国内外对肝血管瘤的病因、发病机制、临床和影像学特点、诊断及治疗的研究取得一定进步,但尚缺乏高级别的临床研究证据。目前,国内外学界对肝血管瘤的临床特征与诊断、治疗指征界定、风险评估以及治疗方法选择等问题尚缺乏统一的认识,从而使肝血管瘤的误诊和“过度治疗”的事件时有发生,甚至导致病人身心利益严重受损[1-4]。因此,联合多学科专家共同参与制订肝血管瘤诊断和治疗的专家共识势在必行。本共识旨在规范肝血管瘤的临床诊断与治疗,提高相关专业领域医务人员对肝血管瘤的认识和诊断与治疗水平,进而造福于病人。
Rare variants in novel and known genes associated with primary angle closure glaucoma based on whole exome sequencing of 549 probands

Primary angle closure glaucoma (PACG) is one of the most common causes of irreversible blindness in Asia and about 80% of PACG are present in Asia (Song et al.,2017).Genetics plays an important role in the development of PACG (Gramer et al.,2014).Recently,eight common SNPs were found to be strongly associated with PACG (Vithana et al.,2012;Khor et al.,2016) and mutations in MYRF cause high hyperopia accompanied with PACG (Xiao et al.,2019).However,the genetic defects underlying PACG are still largely unknown.On the other hand,secondary angle closure glaucoma (SACG) has been reported to associate with microphthalmia (Yu et al.,2009) and nanophthalmia (Burgoyne et al.,2002).SACG is occasionally accompanied with some forms of retinopathy,such as bestrophinopathy due to BEST1 mutations (Vincent et al.,2011),choroideremia due to CHM mutations (Ouyang et al.,2018),and retinoschisis due to RS1 mutations (Huang et al.,2014).It is possible that the genetic defects responsible for SACG or other eye-related diseases also contribute to PACG with varied phenotype or PACG arising as the first or significant sign.Variants in additional novel genes are presumed to contribute to PACG.Whole exome sequencing (WES) provides a novel avenue to identify diseaseassociated variants in novel and known genes at genome-wide level,which has not been applied in large case series of PACG.
Effects of febuxostat on atrial remodeling in a rabbit model of atrial fibrillation induced by rapid atrial pacing

Background Febuxostat,a novel nonpurine selective inhibitor of xanthine oxidase (XO),may be used in the prevention and management of atrial fibrillation (AF).The purpose of this study was to evaluate the effects of febuxostat on atrial remodeling in a rabbit model of AF induced by rapid atrial pacing (RAP) and the mechanisms by which it acts.Methods Twenty-four rabbits were randomly divided into four groups:sham-operated group (Group S),RAP group (Group P),RAP with 5 mg/kg per day febuxostat group (Group LFP),and RAP with 10 mg/kg per day febuxostat group (Group HFP).All rabbits except those in Group S were subjected to RAP at 600 beats/min for four weeks.The effects of febuxostat on atrial electrical and structural remodeling,markers of inflammation and oxidative stress,and signaling pathways involved in the left atrium were examined.Results Shortened atrial effective refractory period (AERP),increased AF inducibility,decreased mRNA levels of Cav1.2 and Kv4.3,and left atrial enlargement and dysfunction were observed in Group P,and these changes were suppressed in the groups treated with febuxostat.Prominent atrial fibrosis was observed in Group P,as were increased levels of TGF-β1,Collagen I,and α-SMA and decreased levels of Smad7 and eNOS.Treatment with febuxostat attenuated these differences.Changes in inflammatory and oxidative stress markers induced by RAP were consistent with the protective effects of febuxostat.Conclusions This study is the first to find that febuxostat can inhibit atrial electrical and structural remodeling of AF by suppressing XO and inhibiting the TGF-β1/Smad signaling pathway.
脊柱内镜治疗复发性腰椎间盘突出症的进展

复发性腰椎间盘突出症(recurrent lumbar disc herniation,RLDH)通常指椎间盘切除术后症状缓解,其后出现同一节段同侧和(或)对侧椎间盘再次突出,引起相应的神经、马尾压迫症状,患病率在7% ~ 24%。RLDH患者由于初次后路手术的原因,术后通常伴有瘢痕异常增生、椎管内广泛粘连,合并腰椎滑脱和失稳倾向,增加再次手术的风险和难度。硬脊膜撕裂、脑脊液漏、神经损伤、感染等并发症是再次手术的常见并发症。RLDH再次手术并发症发生率为0 ~ 34.6%,是初次手术的2.5 ~ 4.7倍。除此之外,初次后路手术破坏了局部正常解剖组织结构,为手术安全,术者往往需要从正常解剖组织进入,扩大显露范围,后方组织结构的遭到更多的破坏,从而增加术后腰背痛和腰椎的不稳的风险。近年来,随着脊柱内镜技术的娴熟、理念的更新、器械的不断改进和发展,经皮内镜腰椎间盘髓核切除术(percutaneous endoscopic lumbar discectomy,PELD)采用侧后方经椎间孔入路,避免再次手术分离瘢痕组织的困难,为治疗RLDH开辟了新思路。PELD经侧后方经椎间孔入路可有效避开初次后路手术引起的瘢痕组织,从而避免脊柱后方组织结构的进一步破坏,降低传统再次手术分离后方瘢痕组织造成的神经损伤及硬膜撕裂的高风险,在RLDH翻修手术中显示出特有的优势。本文对脊柱内镜治疗RLDH进展进行文献总结。
Configuration of propagator method for calculation of electron velocity distribution function in gas under crossed electric and magnetic fields

This paper presents a self-contained description on the configuration of propagator method (PM) to calculate the electron velocity distribution function (EVDF) of electron swarms in gases under DC electric and magnetic fields crossed at a right angle. Velocity space is divided into cells with respect to three polar coordinates v, θ and φ. The number of electrons in each cell is stored in three-dimensional arrays. The changes of electron velocity due to acceleration by the electric and magnetic fields and scattering by gas molecules are treated as intercellular electron transfers on the basis of the Boltzmann equation and are represented using operators called the propagators or Green's functions. The collision propagator, assuming isotropic scattering, is basically unchanged from conventional PMs performed under electric fields without magnetic fields. On the other hand, the acceleration propagator is customized for rotational acceleration under the action of the Lorentz force. The acceleration propagator specific to the present cell configuration is analytically derived. The mean electron energy and average electron velocity vector in a model gas and SF_6 were derived from the EVDF as a demonstration of the PM under the Hall deflection and they were in a fine agreement with those obtained by Monte Carlo simulations. A strategy for fast relaxation is discussed, and extension of the PM for the EVDF under AC electric and DC/AC magnetic fields is outlined as well.
紫菜多糖抑制哮喘大鼠模型NF - κB信号通路

目的研究紫菜多糖对哮喘大鼠模型肺组织中NF-κB信号通路表达的作用。方法卵清蛋白致敏建立哮喘大鼠模型,紫菜多糖干预后评估大鼠症状变化,观察肺组织炎症表现,Western blot法检测NF-κB蛋白表达,ELISA法检测肺泡灌洗液中TNF-α、IL-1β、IL-4、IL-6水平。结果紫菜多糖组大鼠肺组织炎症病理变化减轻,NF-κB蛋白表达及TNF-α、IL-1β、IL-4、IL-6水平降低,过敏性炎症反应减轻,其检测值和症状评估接近健康大鼠。结论紫菜多糖可缓解哮喘大鼠气道炎症反应,其机制可能与抑制NF-κB信号通路表达有关。
外伤后首诊为眼眶肿物的嗅神经母细胞瘤一例

眼耳鼻咽喉头颈部位于体表,易受外界暴力导致创伤,根据不同部位、程度、范围以及是否合并其他部位损伤,其临床表现各异,但具有以下几个共同点:疼痛、出血、功能障碍等。本例患者的临床特点是在患者遭受创伤后出现的,是外伤导致该病被发现,初为眼眶周疼痛伴有淤青,进而疼痛消失,后出现眶下周肿胀,进展迅速。然而该病是否因外伤后引起的一系列局部或全身炎症反应导致ONB瘤体周围微环境改变,进而导致临床症状迅速出现并急剧加重,由于目前缺乏大宗病例报道,且无相关病理生理学证据,目前尚不得而知。嗅神经母细胞瘤临床上少见,首诊于眼科的患者更是甚少,且该病恶性程度高,易转移,死亡率高,故提醒广大医师同人,接诊时一定要注意全面检查,防止误诊或漏诊。
Influence of Coating Layer on Acoustic Wave Propagation in a Random Complex Medium with Resonant Scatterers

We investigate the influence of coating layer on acoustic wave propagation in a dispersed random medium consisting of coated fibers. In the strong-scattering regime, the characteristics of wave scattering resonances are found to evolve regularly with the properties of the coating layer. By theoretical calculation, frequency gaps are found in acoustic excitation spectra in a random medium. The scattering cross section results present the evolution of scattering resonances with the properties of the coating layer, which offers a good explanation for the change of the frequency gaps. The velocity of the propagation quasi-mode is also shown to depend on the filling fraction of the coating layer. We use the generalized coherent potential-approximation approach to solve acoustic wave dispersion relations in a complicated random medium consisting of coating-structure scatterers. It is shown that our model reveals subtle changes in the behavior of the acoustic wave propagating quasi-modes.
Genetic mapping of QTL for agronomic traits and grain mineral elements in rice

Malnutrition is one of the prevailing health problems worldwide, affecting a large proportion of the populations in rice-consuming countries. Breeding rice varieties with increased concentrations of elements in the grain is considered the most cost-effective approach to alleviate malnutrition. Development of molecular markers for high grain concentrations of essential elements, particularly Zn, for use in marker-assisted selection(MAS) can hasten breeding efforts to develop rice varieties with nutrient-dense grain. We performed QTL mapping for four agronomic traits: days to 50% flowering, plant height, number of tillers, grain yield, and 13 grain elements: As, B, Ca, Co, Cu, Fe, K, Mg, Mn, Mo, Na, P, and Zn, in two doubled-haploid populations derived from the crosses IR64 × IR69428 and BR29 × IR75862. These populations were phenotyped during 2015DS and 2015WS at IRRI, Los Banos, The Philippines, and genotyped them with a 6 K SNP chip. Inclusive composite interval mapping revealed 15 QTL for agronomic traits and 50 QTL for grain element concentration. Of these, eight QTL showed phenotypic variance of >25% and 11 QTL were consistent across seasons. There were seven QTL co-localization regions containing QTL for more than two traits. Twenty five epistatic interactions were detected for two agronomic traits and seven mineral elements. Several DH lines with high Fe and Zn in polished rice were identified. These lines can be used as donors for breeding high-Zn rice varieties. Some of the major QTL can be further validated and used in MAS to improve the concentrations of nutritive elements in rice grain.
Identification of QTL for kernel number-related traits in a rice chromosome segment substitution line and fine mapping of qSP1

A chromosome segment substitution line(CSSL) is a powerful tool for combining quantitative trait locus(QTL) mapping with the pyramiding of desirable alleles. The rice CSSL Z1364 with increased kernel number was identified in a BC 3 F 8 population derived from a cross of Nipponbare as the recipient with Xihui 18 as the donor parent. Z1364 carried three substitution segments distributed on chromosomes 1, 6, and 8. The mean substitution length was 1.19 Mb. Of 17 QTL identified on the substitution segments, qSP1 for spikelets per panicle, qSSD1 for seed-set density, and qNSB1 for number of secondary branches explained respectively 57.34%, 87.7%, and 49.44% of the corresponding phenotypic variance and were all linked to RM6777. Chi-square analysis showed that the increased kernel number in Z1364 was inherited recessively by a single gene. By fine mapping, qSP1 was delimited to a 50-kb region on the short arm of chromosome 1. Based on DNA sequence, a previously uncharacterized rice homolog of Arabidopsis thaliana AT4G32551 was identified as a candidate gene for qSP1 in which mutation increases the number of spikelets and kernels in Z1364. qSP1 was expressed in all tissues, but particularly in 1-cm panicles. The expression levels of OsMADS22, GN1A, and DST were upregulated and those of LAX2, GNP1, and GHD7 were downregulated in Nipponbare. These results provide a foundation for functional research on qSP1.
Rice-duck co-culture benefits grain 2-acetyl-1- pyrroline accumulation and quality and yield enhancement of fragrant rice

Rice-duck co-culture is an integrated farming technology that benefits rice production, grain quality, and ecological sustainability in paddy fields. However, little is known about the effects of rice-duck co-culture on enzyme activity involved in the biosynthesis of 2-acetyl-1-pyrroline(2-AP), the volatile that gives fragrant rice its' distinctive and sought-after aroma. The present study aimed to examine the influence of rice-duck co-culture on the photosynthesis, yield, grain quality, rice aroma, and the enzymes involved in 2-acetyl-1-pyrroline biosynthesis in the cultivar Meixiangzhan 2 during the early and late rice growing seasons of 2016 in Guangzhou, China. We compared the rice grown in paddy fields with and without ducks. We found that rice-duck co-culture not only improved the yield and quality of fragrant rice grain, but also promoted the precursors of 2-AP biosynthesis formation and 2-AP accumulation in the grain. Grain 2-AP content in rice-duck co-culture was noticeably increased with 9.60% and 20.81% in early and late seasons, respectively. Proline and pyrroline-5-carboxylic acid(P5C)(precursors of 2-AP biosynthesis) and the activity of enzymes such as proline dehydrogenase(ProDH), ornithine aminotransferase(OAT) and Δ~1 pyrroline-5-carboxylic acid synthetase(P5CS) were all improved by 10.15%–12.99%, 32.91%–47.75%, 17.81%–26.71%, 6.25%–21.78%, and 10.58%– 38.87% under rice-duck co-culture in both seasons, respectively. Overall, our results suggest that rice-duck co-culture is an environmentally-friendly and sustainable approach to improving rice aroma and grain quality of fragrant rice.
Connexin 43 hemichannels protect bone loss during estrogen deficiency

Estrogen deficiency in postmenopausal women is a major cause of bone loss, resulting in osteopenia, osteoporosis, and a high risk for bone fracture. Connexin 43 (Cx43) hemichannels (HCs) in osteocytes play an important role in osteocyte viability, bone formation, and remodeling. We showed here that estrogen deficiency reduced Cx43 expression and HC function. To determine if functional HCs protect osteocytes and bone loss during estrogen deficiency, we adopted an ovariectomy model in wild-type (WT) and two transgenic Cx43 mice: R76W (dominant-negative mutant inhibiting only gap junction channels) and Cx43 Δ130-136 (dominant-negative mutant compromising both gap junction channels and HCs). The bone mineral density (BMD), bone structure, and histomorphometric changes of cortical and trabecular bones after ovariectomy were investigated. Our results showed that the Δ130-136 transgenic cohort had greatly decreased vertebral trabecular bone mass compared to WT and R76W mice, associated with a significant increase in the number of apoptotic osteocyte and empty lacunae. Moreover, osteoclast surfaces in trabecular and cortical bones were increased after ovariectomy in the R76W and WT mice, respectively, but not in Δ130-136 mice. These data demonstrate that impairment of Cx43 HCs in osteocytes accelerates vertebral trabecular bone loss and increase in osteocyte apoptosis, and further suggest that Cx43 HCs in osteocytes protect trabecular bone against catabolic effects due to estrogen deficiency.
A preliminary study on the theory and method of comprehensive regionalization of cryospheric services

As one of the five most important spheres affecting climate systems globally, the cryosphere not only exerts crucial impacts on natural environment, but also plays a key role in guaranteeing the goods and services provision of the oasis in the cold and arid regions. However, there is a lack of synthesized knowledge about the contributions and profitability on socio-economic aspects of the cryospheric services (CSs). To cope with this key and urgent sustainable development issues, this study constructs a comprehensive regionalization research system that integrates the natural and socio-economic aspects for cryospheric characteristics with emphasis on interdisciplinary approaches. Guided by the supplydemand equilibrium model and the service maximization model, the research system consists of establishing a classification system for CSs, identifying the spatial distribution pattern of CSs, and constructing the comprehensive regionalization of CSs, which finally divides the research area into relatively independent, complete, and organically linked CS units of multiple spatial levels. By setting up a bridge between the CSs with socio-economic needs, it has profound and practical significance and implications for implementing the sustainable utilization strategies and macroeconomic policymaking for global environmental protection.
Spatial-temporal variability of throughfall in a subtropical deciduous forest from the hilly regions of eastern China

Throughfall variability plays a crucial role in regulating hydrological and biogeochemical processes in forest ecosystems. However, throughfall variability and its potential influencing factors remain unclear in the subtropical deciduous forest because of its complex canopy and meteorological conditions. Here, the spatial variability and temporal stability of throughfall were investigated from October 2016 to December 2017 within a deciduous forest in the subtropical hilly regions of eastern China, and the effects of meteorological variables and distance from nearest tree trunk on throughfall variability were systematically evaluated. Throughfall variability during the leafed period was slightly higher than that during the leafless period inferred from the coefficient of variation of throughfall amounts (CVTF), with 13.2%-40.9 %and 18.7%-31.9%, respectively. The multiple regression model analysis suggested that the controlling factors of throughfall variability were different in studied periods: Maximum 10-min rainfall intensity, wind speed and air temperature were the dominant influencing factors on throughfall variability during the leafed period, with the relative contribution ratio (RCR) of 25.9%, 18.7 %and 8.9%, respectively. By contrast, throughfall variability was affected mainly by the mean rainfall intensity (RCR=40.8%) during the leafless period. The temporal stability plots and geostatistical analysis indicated that spatial patterns of throughfall were stable and similar among rainfall events. Our findings highlight the important role of various meteorological factors in throughfall variability and are expected to contribute to the accurate assessment of throughfall, soil water and runoff within the subtropical forests.
Volume expansion rates of seismic landslides and influencing factors: A case study of the 2008 Wenchuan earthquake

When a big landside occurs, source material can change into loose deposit during its runout, causing the increase of the total landslide volume to some extent. Such changes can influence the quantification of seismic landslides. The objective of this paper was to study the volume expansion rate of landslides based on the data of 1417 co-seismic landslides triggered by the 2008 Wenchuan, China M_w 7.9 earthquake. We also analyzed the correlations between this rate and landslide geometric parameters (volume, height (H), length-width ratio (L/W), length-height ratio (L/H)), and environmental factors (peak ground acceleration (PGA), lithology, slope angle and aspect). The results show that the total source volume of the 1417 landslides is 1248 million m3, while the total volume of the deposit is 1501 million m3, which means the total volume expanding rate (Et) is 20.3 %with the average volume expansion rate (Ea) 22.6%. The analysis indicates that volume expansion rate generally decreases with the increasing volume and height of landslides, while becoming larger with increasing L/H and L/W. Besides, the volume expansion rate is closely related to the landslide type and the volume scale of landslides. This study analyses volume change of co-seismic landslides deeply, permitting to help the correct quantification of the source volume and deposit volume of seismic landslide and a useful reference for the correct quantification of landslide volume.
广陈皮的古今临床应用

陈皮具有理气健脾、燥湿化痰之功,查阅古籍和文献发现广陈皮主要以治疗消化系统疾病和呼吸系统疾病为主,同时在血液循环系统疾病、神经及精神系统疾病、泌尿系统疾病治疗上也有应用,而广陈皮在抗菌、抗病毒上的临床应用主要出现在古籍中。该论对广陈皮临床应用就古代部分和现代部分进行归纳论述,以希有利于后期临床研究。
黄芪甲苷对肺纤维化小鼠VEGF/VEGFR2信号通路的影响

目的探讨黄芪甲苷对肺纤维化小鼠的影响及其机制是否与VEGF/VEGFR2信号通路有关。方法80只雌性ICR小鼠随机分为空白组、模型组、泼尼松组、黄芪甲苷组,每组20只。除空白组外,其它3组均采用鼻腔滴注博来霉素建立肺纤维化模型,在造模后第1天起,各组给予相应药物进行灌胃治疗,连续给药14天。在造模后的第7天、28天,分两批进行取材,用HE染色、Masson染色分别观察各组小鼠的肺泡炎及肺纤维化程度;采用RT-PCR法检测血管内皮生长因子(VEGF)、血管内皮生长因子受体2(VEGFR2) mRNA表达。结果与模型组比较,第7天、28天黄芪甲苷治疗组小鼠的肺泡炎及肺纤维化程度减轻,肺组织的VEGF、VEGFR2 mRNA表达下降(P <0.01或P <0.05)。结论黄芪甲苷可通过降低VEGF、VEGFR2基因表达水平,来发挥抗肺纤维化的作用。
湖南沅澧中下游流域旱稻发展状况及栽培技术要点

通过对湖南省沅水和澧水中下游流域旱稻种植情况开展调查,比较系统地总结出适宜该区域的旱稻种植技术,分析发展旱稻过程中存在的问题,提出几条建议,对相似生态区域发展旱稻生产具有一定的指导意义。
广适性优质高产抗瘟香型两系杂交水稻新组合Y两优3088

Y两优3088是广东海洋大学、广东天弘种业有限公司利用自育的抗稻瘟病优质香稻恢复系弘恢3088与湖南杂交水稻研究中心选育的优良光温敏核不育系Y58S配组育成的籼型杂交水稻新组合。该组合具有高产稳产、米质优良、饭味香浓、抗稻瘟病、适应性广等特点,2014、2017年分别通过广东省和海南省农作物品种审定委员会审定。
不同播插方式对杂交水稻制种母本群体特性的影响

为探索杂交水稻制种母本适宜的轻简播插方式,采用开沟起垄精量穴直播、人工撒直播和机械移栽,研究了其对3个制种组合母本秧苗素质、苗数动态、群体穗粒构成、抽穗动态、异交结实率、产量及抗倒伏特性的影响。结果表明,起垄精量穴直播的秧苗素质地上部分如苗高、苗基宽和苗鲜重等优于机械移栽秧苗,而地下部如白根数、根鲜重和根系活力等,以机械移栽秧苗优于起垄精量穴直播,起垄精量穴直播优于人工撒直播。起垄精量穴直播处理的分蘖盛期较机械移栽和人工撒直播处理延长3 ~ 5 d,且群体分蘖数最多;播始历期较机械移栽短5 d,较人工撒直播长0 ~ 1 d;群体抽穗历期与机械移栽无差异,比人工撒直播长1 ~ 2 d;主茎叶片数较机械移栽多0.25 ~ 0.97叶。起垄精量穴直播能显著提高单位面积有效穗数和单位面积颖花数,具有较高的产量潜力,抗倒伏能力优于机械移栽和人工撒直播。说明同步开沟起垄精量穴直播适用于杂交水稻机械化制种。
婴儿色素性神经外胚层瘤一例

本文报道婴儿色素性神经外胚层瘤影像表现一例。患儿男,3个月6 d,CT表现为左侧颞骨、顶骨交界处圆形软组织肿块影,呈膨胀性改变,向内压迫脑组织。MRI表现为左侧颞骨、顶骨交界处一哑铃形包块影,T_1WI呈等信号,T_2WI呈低信号影,内部信号不均匀,中央区可见斑片样T_2WI高信号。DWI序列呈稍高信号。
规范应用MRI技术,提高阿尔茨海默病临床诊疗水平

阿尔茨海默病(Alzheimer disease,AD)是严重影响我国中老年人群健康的重大疾病,其复杂的临床表现及并发症给AD临床诊疗带来巨大挑战。MRI作为一种无创、无电离辐射的影像检查方法被临床广泛应用。建立AD-MRI检查规范及诊断中国专家共识,对规范AD患者的MR检查技术和流程,提高MR技术在AD的应用水平,提升我国AD临床诊断及鉴别诊断能力,探究中国国情下AD临床转归及影像研究有重要意义。