TY  - JOUR
A1  - Barbolini, Natasha
A1  - Woutersen, Amber
A1  - Dupont-Nivet, Guillaume
A1  - Silvestro, Daniele
A1  - Tardif-Becquet, Delphine
A1  - Coster, Pauline M. C.
A1  - Meijer, Niels
A1  - Chang, Cun
A1  - Zhang, Hou-Xi
A1  - Licht, Alexis
A1  - Rydin, Catarina
A1  - Koutsodendris, Andreas
A1  - Han, Fang
A1  - Rohrmann, Alexander
A1  - Liu, Xiang-Jun
A1  - Zhang, Y.
A1  - Donnadieu, Yannick
A1  - Fluteau, Frederic
A1  - Ladant, Jean-Baptiste
A1  - Le Hir, Guillaume
A1  - Hoorn, M. Carina
T1  - Cenozoic evolution of the steppe-desert biome in Central Asia
JF  - Science Advances
N2  - The origins and development of the arid and highly seasonal steppe-desert biome in Central Asia, the largest of its kind in the world, remain largely unconstrained by existing records. It is unclear how Cenozoic climatic, geological, and biological forces, acting at diverse spatial and temporal scales, shaped Central Asian ecosystems through time. Our synthesis shows that the Central Asian steppe-desert has existed since at least Eocene times but experienced no less than two regime shifts, one at the Eocene-Oligocene Transition and one in the mid-Miocene. These shifts separated three successive "stable states," each characterized by unique floral and faunal structures. Past responses to disturbance in the Asian steppe-desert imply that modern ecosystems are unlikely to recover their present structures and diversity if forced into a new regime. This is of concern for Asian steppes today, which are being modified for human use and lost to desertification at unprecedented rates.
Y1  - 2020
U6  - https://doi.org/10.1126/sciadv.abb8227
SN  - 2375-2548
VL  - 6
IS  - 41
PB  - American Association for the Advancement of Science
CY  - Washington
ER  - 
TY  - JOUR
A1  - Tian, Guang-Zong
A1  - Hu, Jing
A1  - Zhang, Heng-Xi
A1  - Rademacher, Christoph
A1  - Zou, Xiao-Peng
A1  - Zheng, Hong-Ning
A1  - Xu, Fei
A1  - Wang, Xiao-Li
A1  - Linker, Torsten
A1  - Yin, Jian
T1  - Synthesis and conformational analysis of linear homo- and heterooligomers from novel 2-C-branched sugar amino acids (SAAs)
JF  - Scientific reports
N2  - Sugar amino acids (SAAs), as biologically interesting structures bearing both amino and carboxylic acid functional groups represent an important class of multifunctional building blocks. In this study, we develop an easy access to novel SAAs in only three steps starting from nitro compounds in high yields in analytically pure form, easily available by ceric (IV) mediated radical additions. Such novel SAAs have been applied in the assembly of total nine carbopeptoids with the form of linear homo-and heterooligomers for the structural investigations employing circular dichroism (CD) spectroscopy, which suggest that the carbopeptoids emerge a well-extended, left (or right)-handed conformation similar to polyproline II (PPII) helices. NMR studies also clearly demonstrated the presence of ordered secondary structural elements. 2D-ROESY spectra were acquired to identify i+1NH <-> (C1H)-C-i, (C2H)-C-i correlations which support the conformational analysis of tetramers by CD spectroscopy. These findings provide interesting information of SAAs and their oligomers as potential scaffolds for discovering new drugs and materials.
Y1  - 2018
U6  - https://doi.org/10.1038/s41598-018-24927-6
SN  - 2045-2322
VL  - 8
PB  - Nature Publ. Group
CY  - London
ER  - 
TY  - BOOK
A1  - Zhang, Xi
T1  - Wechselkurserklärung bei Kreditrationierung : das Beispiel China
T3  - Forschungsbericht
Y1  - 2010
SN  - 978-3-9812422-7-0
VL  - 0510
PB  - Univ. Inst. für Makroökonomik
CY  - Potsdam
ER  - 
TY  - JOUR
A1  - Xiang, Hai
A1  - Gao, Jianqiang
A1  - Yu, Baoquan
A1  - Zhou, Hui
A1  - Cai, Dawei
A1  - Zhang, Youwen
A1  - Chen, Xiaoyong
A1  - Wang, Xi
A1  - Hofreiter, Michael
A1  - Zhao, Xingbo
T1  - Early Holocene chicken domestication in northern China
JF  - Proceedings of the National Academy of Sciences of the United States of America
N2  - Chickens represent by far the most important poultry species, yet the number, locations, and timings of their domestication have remained controversial for more than a century. Here we report ancient mitochondrial DNA sequences from the earliest archaeological chicken bones from China, dating back to similar to 10,000 B.P. The results clearly show that all investigated bones, including the oldest from the Nanzhuangtou site, are derived from the genus Gallus, rather than any other related genus, such as Phasianus. Our analyses also suggest that northern China represents one region of the earliest chicken domestication, possibly dating as early as 10,000 y B.P. Similar to the evidence from pig domestication, our results suggest that these early domesticated chickens contributed to the gene pool of modern chicken populations. Moreover, our results support the idea that multiple members of the genus Gallus, specifically Gallus gallus and Gallus sonneratii contributed to the gene pool of the modern domestic chicken. Our results provide further support for the growing evidence of an early mixed agricultural complex in northern China.
KW  - ancient DNA
KW  - chicken
KW  - domestication
KW  - species origin
Y1  - 2014
U6  - https://doi.org/10.1073/pnas.1411882111
SN  - 0027-8424
VL  - 111
IS  - 49
SP  - 17564
EP  - 17569
PB  - National Acad. of Sciences
CY  - Washington
ER  -