Results 1 to 10 of about 13,584,933 (301)

A stem group Codium alga from the latest Ediacaran of South China provides taxonomic insight into the early diversification of the plant kingdom

BMC Biology, 2022
Background In recent years, Precambrian lifeforms have generated an ever-increasing interest because they revealed a rich eukaryotic diversity prior to the Cambrian explosion of modern animals.
Shu Chai, Cédric Aria, Hong Hua
doaj   +1 more source

First Report of Small Skeletal Fossils from the Upper Guojiaba Formation (Series 2, Cambrian), Southern Shaanxi, South China

Biology, 2023
A small skeletal fossil assemblage is described for the first time from the bioclastic limestone interbeds of the siltstone-dominated Guojiaba Formation, southern Shaanxi, China. The carbonate-hosted fossils include brachiopods (Eohadrotreta zhujiahensis,
Mei Luo, Fan Liu, Yue Liang, Luke C. Strotz, Jiayue Wang, Yazhou Hu, Baopeng Song, Lars E. Holmer, Zhifei Zhang   +8 more
doaj   +1 more source

Relative validity of a semi-quantitative food frequency questionnaire for Singaporean toddlers aged 15–36 months

BMC Nutrition, 2018
Background There is presently no simple tool for use in large epidemiological studies to understand the food and nutrient intakes of Asian toddlers. This study aimed to assess the relative validity of a semi-quantitative food frequency questionnaire ...
Cameron Allan, Ummi Hani Abdul Kader, Jowynn Yu Ying Ang, Leilani Muhardi, Smita Nambiar   +4 more
doaj   +1 more source

An encrusting kleptoparasite-host interaction from the early Cambrian

Nature Communications, 2020
Parasitic interactions are difficult to document in the fossil record. Here, Zhang et al. analyze a large population of a Cambrian brachiopod and show it was frequently encrusted by tubes aligned to its feeding currents and that encrustation was ...
Zhifei Zhang, Luke C. Strotz, Timothy P. Topper, Feiyang Chen, Yanlong Chen, Yue Liang, Zhiliang Zhang, Christian B. Skovsted, Glenn A. Brock   +8 more
doaj   +1 more source

Branched Setae or Attached Macroalgae: A Case Study of an Exceptionally Preserved Brachiopod from the Early Cambrian Chengjiang Lagerstätte

Biology
The remarkable conservation of soft tissues within Cambrian fossils has significantly enhanced our comprehension of the origins and evolutionary trajectories of animals, in addition to the progression of ecological intricacy.
Yue Liang, Timothy P. Topper, Baopeng Song, Caibin Zhang, Oluwatoosin B. A. Agbaje, Lars E. Holmer, Zhifei Zhang   +6 more
doaj   +1 more source

Geochemical records and environmental analysis of the Ediacaran-Cambrian boundary in Eastern Yunnan, South China

Frontiers in Earth Science, 2023
The Ediacaran–Cambrian transition is characterized by an unprecedented change in biosphere, lithosphere, and atmosphere. However, the identification of this transition and its global correlation remains debated.
Xuan Yang, Chao Chang, Yanlong Chen, Timothy Topper, Timothy Topper, Fan Liu, Yue Liang, Ruisen Fang, Zhifei Zhang   +8 more
doaj   +1 more source

Placental T2* as a measure of placental function across field strength from 0.55T to 3T

Scientific Reports
Placental MRI is increasingly implemented in clinical obstetrics and research. Functional imaging, especially T2*, has been shown to vary across gestation and in pathology.
Megan Hall, Jordina Aviles Verdera, Daniel Cromb, Sara Neves Silva, Mary Rutherford, Serena J. Counsell, Joseph V Hajnal, Lisa Story, Jana Hutter   +8 more
doaj   +1 more source

The Paleosalinity Context for the Ecological Pattern of the Chengjiang Biota

Geophysical Research Letters
The Chengjiang biota provides critical insights into metazoan diversification during the Cambrian Explosion, preserved at multiple localities with varying fossil abundances across the Chengjiang Bay.
Chao Chang, Kuizi Li, Qingshan Wang, Liang Duan, Kangjun Huang, Xingliang Zhang   +5 more
doaj   +1 more source

3D morphology of the Cambrian bivalved arthropod Sunella informs about head segmentation, arthrodization, and arthropodization

Communications Biology
A head region with specialised appendages, sclerotization, and segmentation of the trunk (arthrodization), and its appendages (arthropodization) represent three key innovations in arthropod evolution.
Cong Liu, Stephen Pates, Mingjing Zhang, Yu Wu, Jiaxin Ma, Dongjing Fu, Xingliang Zhang   +6 more
doaj   +1 more source

Physical simulation test of true triaxial rock mechanics for waterflood dilation in offshore oilfields

Scientific Reports
The reservoirs in the western South China Sea oilfield are characterized by low permeability, poor pore connectivity, high laminated content, severe pollution, and prominent interlayer contradictions.
Dengke Li, Huan Chen, Xuelin Liang, Zhi Huang, Yanfang Gao   +4 more
doaj   +1 more source