The temporal dynamics of antimicrobial-resistant Salmonella enterica and predominant serovars in China

Salmonella enterica is one of the most common bacterial pathogens in humans and animals.Systematic studies on the trends and geographical distribution of antimicrobial-resistant Salmonella and dominant serovars have been well studied in European and American countries while not in China.Here,taking the One-Health strategy,we used>35 000 Salmonella enterica isolates to explore the temporal and spatial dynamics of dominant serovars in China.We found that Salmonella Typhimurium was the dominant ...     

Glacial expansion of cold-tolerant species in low latitudes: megafossil evidence and species distribution modellingOA

<正>The Pleistocene was a time of repeated glaciations that severely affected the land biota over large areas of Eurasia and North America. Drastic climatic fluctuations during the Pleistocene drove largescale extinctions, migrations and diversification in plant and animal populations.These dramatic processes had a strong impact on the distribution of modern flora and fauna.     

我在马来西亚看到的羽毛球

这里是马来西亚紫色联盟最著名的俱乐部——八打灵羽毛球娱乐部,日本队首次拿到汤姆斯杯的功臣田児贤一退役后,也加盟到这里,做教练兼球员。我也不知道他吃了什么,居然胖成这样,人很nice,只是他一口马来口音的英语让我有点儿猝不及防。俱乐部楼道墙上挂起来的比赛服见证了俱乐部的发展,如果说都认识,这一定是暴露年龄的行为了。     

Association of daily sitting time and leisure-time physical activity with body fat among U.S. adults

Background:Prolonged sitting and reduced physical activity lead to low energy expenditures.However,little is known about the joint impact of daily sitting time and physical activity on body fat distribution.We investigated the independent and joint associations of daily sitting time and physical activity with body fat among adults.Methods:This was a cross-sectional analysis of U.S.nationally representative data from the National Health and Nutrition Examination Survey2011-2018 among adults aged ...     

Epidemiology of insertional and midportion Achilles tendinopathy in runners:A prospective cohort study

Background:Achilles tendinopathy(AT) is a common problem among runners.There is only limited evidence for risk factors for AT,and most studies have not defined the AT subcategories.No study has compared the incidence and risk factors between insertional AT and midportion AT,though they are considered distinct.This study aimed to assess incidence and risk factors of AT based on data from a large prospective cohort.The secondary aim was to explore differences in risk factors between insertional an...     

Composites with high omnidirectional fracture toughness due to helical interlocking fasteners are found in gingko seed shellsOA

<正>Engineering of composites mimicking load-bearing materials from living organisms is essential for sustainable economic development and successful resolution of current and future bottle-necks of chemical,automotive,aviation,biomedical,and robotic technologies.As pointed out by G.Wiedemann[1]in 1853 and M.F.Ashby et al.     

意义学习分类学

综合十年的研究,作者描述了意义学习的一种分类办法.最有意义的学习结果是解决问题.在这种分类法中,四种不同的问题解决按层次方式排列.解决问题的先决条件是两种基本的推理技能——类比推理和因果推理,这是解决所有问题的基础.这些推理的形式要求运用概念,以及由概念和关系组成的低阶命题和高阶命题.解决问题的教学应该是让学习者解决问...     

商品个性标志的定义及其在美国流行文化中的角色

在过去的一个多世纪,商品的个性标志一直是美国人钟爱的广告工具。各种各样被广告商作为传播体系的＂会说话的动物＂和＂会跳舞的产品＂已悄无声息地蔓延在美国的流行文化中。1982年,有人在做调查后发现,凡是商品特征明显的广告,在改变品牌偏好的能力上要比同行业其他品牌强。这一点表明社会正在接收商品个性标志这样的讯息。然而,尽管商品个性标志的运用在广告商和消费者中大受欢迎,却几乎被完全遗忘在广告和流行文化研究的角落。本文将从相关文学的角度解析什么是商品个性标志,以及其如何运用在现代广告业中,并与消费者进行交流。     

体力活动与癌症生存研究的10大问题

摘要：今天的美国有1 400万的癌症存活者,其中的很多存活者中都接受了多种治疗,包括手术、放疗、化疗、靶向治疗等。这些治疗能够延长生存时间,但同时也会带来很多急慢性的副作用,危害健康,影响生活质量。体力活动（PA）与癌症生存这一领域发展迅速,主要研究PA对癌症患者的影响。基于该领域的研究进展,提出了以下10大研究问题：1）PA能够降低癌症复发风险、和/或提高存活吗？2）PA能够影响癌症治疗决策、完成率、和/或患者对治疗的反应吗？3）癌症存活者的最佳运动处方是什么？4）静坐少动行为对癌症存活者有何影响？5）癌症存活者最有效的体力活动干预方案是什么？6）哪些癌症会影响病人对PA的反应？7）癌症存活者进行体力活动时需要注意的安全问题有哪些？8）哪些具体的癌症症状可以由PA解决？9）对于癌症晚期患者,体力活动还有何作用？10）如何将体力活动研究结果转化到临床和社区肿瘤实践中来？上述问题的回答至关重要,这不仅关系到体力活动和癌症存活这一研究领域的发展,更重要的是,能够为每年数百万新诊断为癌症的病人、正在接受癌症治疗的病人、治疗结束处于恢复中的病人或是那些正在与晚期癌症抗争的病人带来福音。     

迷上练习场

在许多职业赛事上,你不用破费很多就可以大有所获。乔·狄克逊的下巴紧紧贴在球场的钢丝网上,场内的罗杰·费德勒现在离她只有不到5码远。这位她最喜爱的网球选手,在她的注视下练习完上旋发球后,接着开始练习正手抽击。这是一记典型的费德勒式正拍,球"嗖"地飞出,刚刚过网,狠狠地砸在了边线上。狄克逊情不自禁地吹了个口哨,费德勒轻