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Université de Fribourg

A new glirid-like cricetid from the lower Oligocene of Southern China

Lu, Xiao-Yu ; Ni, Xijun ; Maridet, Olivier

In: Journal of Vertebrate Paleontology, 2021, p. e1917587

Here we report a new cricetid s.l., Caecocricetodon yani, gen. et sp. nov., discovered in the early Oligocene of the Caijiachong Formation in Yunnan Province, China. The new cricetid differs from all known cricetids or stem muroids by its particular molar pattern displaying numerous crests and spurs. Our phylogenetic analysis based on a matrix including 42 taxa and 72 characters indicates...

Université de Fribourg

Phylogeny, taxonomy, and biogeography of Pterocarya (Juglandaceae)

Song, Yi-Gang ; Li, Ying ; Meng, Hong-Hu ; Fragnière, Yann ; Ge, Bin-Jie ; Sakio, Hitoshi ; Yousefzadeh, Hamed ; Bétrisey, Sébastien ; Kozlowski, Gregor

In: Plants, 2020, vol. 9, no. 11, p. 1524

Relict species play an important role in understanding the biogeography of intercontinental disjunctions. Pterocarya (a relict genus) is the valuable model taxon for studying the biogeography of East Asian versus southern European/West Asian disjunct patterns. This disjunction has not been as well studied as others (e.g., between Eastern Asia and North America). Several phylogenetic studies...

Université de Fribourg

High-risk KPC-producing Klebsiella pneumoniae lack type I R-M systems

Zhou, Ying ; Tian, Dongxing ; Tang, Yu ; Yu, Lianhua ; Huang, Yunkun ; Li, Gang ; Li, Meng ; Wang, Yong ; Yang, Zehua ; Poirel, Laurent ; Jiang, Xiaofei

In: International Journal of Antimicrobial Agents, 2020, vol. 56, no. 2, p. 106050

Klebsiella pneumoniae carbapenemase (KPC)-producing K. pneumoniae (KPC-KP) have disseminated worldwide and are a major threat to public health. The multidrug- resistant (MDR)-phenotype of KPC-KP are commonly associated with the presence of high molecular weight blaKPC plasmids. Restriction-modification (R-M) systems provide bacteria with innate defense against plasmids or other infectious gene...

Université de Fribourg

The type I-E CRISPR-Cas system influences the acquisition of bla KPC-IncF plasmid in Klebsiella pneumonia

Zhou, Ying ; Tang, Yu ; Fu, Pan ; Tian, Dongxing ; Yu, Lianhua ; Huang, Yunkun ; Li, Gang ; Li, Meng ; Wang, Yong ; Yang, Zehua ; Xu, Xiaogang ; Yin, Zhe ; Zhou, Dongsheng ; Poirel, Laurent ; Jiang, Xiaofei

In: Emerging Microbes & Infections, 2020, vol. 9, no. 1, p. 1011–1022

Klebsiella pneumoniae carbapenemase (KPC)-producing K. pneumoniae (KPC-KP) have disseminated worldwide and emerged as major threats to public health. Of epidemiological significance, the international pandemic of KPC-KP is primarily associated with CG258 isolates and bla KPC-IncF plasmids. CRISPR-Cas system is an adaptive immune system that can hinder gene expansion driven by horizontal gene ...

Université de Fribourg

Global biogeographic synthesis and priority conservation regions of the relict tree family Juglandaceae

Song, Yi‐Gang ; Fragnière, Yann ; Meng, Hong‐Hu ; Li, Ying ; Bétrisey, Sébastien ; Corrales, Adriana ; Manchester, Steven ; Deng, Min ; Jasińska, Anna K. ; Văn Sâm, Hoàng ; Kozlowski, Gregor

In: Journal of Biogeography, 2020, vol. 47, no. 3, p. 643–657

Aim To establish a complete database of Juglandaceae at a spatiotemporal scale and develop a phylogeographic framework with which to elucidate the distributional patterns, diversity patterns, origins, evolution, and conservation priority regions of this family. Location Worldwide. Taxon Walnut family (Juglandaceae). Methods Data on the distribution of all the extant and fossil species of...

Université de Fribourg

Supply and demand law under variable information

Yuan, Guanghui ; Han, Jingti ; Zhou, Lei ; Liang, Hejun ; Zhang, Yi-Cheng

In: Physica A: Statistical Mechanics and its Applications, 2019, vol. 536, p. 121004

When the product quality is limited and the information capability is variable, we propose the enterprise enhances corporate profits by changing the relationship between market demand and external resources. We assume that the information capacity can be changed through the input of external resources. In this paper, we present a research agenda that empowers external resources to transform...

Université de Fribourg

Revealing ‘plasmaron’ feature in DySb by optical spectroscopy study

Ban, W J ; Wu, D S ; Xu, Bing ; Luo, J L ; Xiao, Hong

In: Journal of Physics: Condensed Matter, 2019, vol. 31, no. 40, p. 405701

We report magnetic susceptibility, resistivity and optical spectroscopy study on single crystal sample DySb. It exhibits extremely large magnetoresistance (XMR), and a magnetic phase transition from paramagnetic (PM) to antiferromagnetic (AFM) state at about 10 K. A 'screened' plasma edge at about 4000 cm−1 is revealed by optical measurement, which suggests that the material has a low...