Results 31 to 40 of about 6,387 (173)

Rachis morphology cannot accurately predict the mechanical performance of primary feathers in extant (and therefore fossil) feathered flyers [PDF]

Royal Society Open Science, 2017
It was previously suggested that the flight ability of feathered fossils could be hypothesized from the diameter of their feather rachises. Central to the idea is the unvalidated assumption that the strength of a primary flight feather (i.e. its material
John Lees, Terence Garner, Glen Cooper, Robert Nudds   +3 more
doaj   +1 more source

Past, present and future of local crop evolution

PLANTS, PEOPLE, PLANET, EarlyView.
Promoting agrobiodiversity is a promising strategy for mitigating the negative effects of climate change on global food security. We highlight the central role evolutionary processes play in harnessing the potential of local crops by integrating genomics, archaeology, ethnobotany and traditional ecological knowledge (TEK).
Nataly Allasi Canales, Philippa Ryan, Amy Jackson, Hong Phuong Le, James Borrell, Aaron Davis, Rafal M. Gutaker   +6 more
wiley   +1 more source

Aspects Scanographiques des Traumatismes du Rachis à Bouaké

Health Research in Africa
RÉSUMÉ Objectif. Décrire les aspects épidémiologiques et tomodensitométriques des traumatismes du rachis à Bouaké. Matériels et méthodes. Nous avons mené une étude rétrospective et descriptive sur une période de seize mois (de Janvier 2020 à Avril 2021).
Brou Lambert Yao, Sara Carole Sanogo, Malick Soro, Kouamé Paul Bon-Fils Kouassi, Akoli Eklou Baudoiun Bravo-Tsri, Kesse Emile Tanoh, Allou Florent Kouadio, Bouassa Davy Mélaine Kouakou, Jean Jacques Goua, Issa Konate   +9 more
doaj   +1 more source

Small Object Detection Method for Bioimages Based on Improved YOLOv8n Model

Integrative Zoology, EarlyView.
This study proposes a small object detection method for bioimages based on an improved YOLOv8n model. Experimental results demonstrate that the proposed approach effectively enhances detection precision, recall, and mAP50, offering a novel solution for the technical challenges in biological microscopy research.
Xiaoyu Li, Chengrui Shang, Xian Hou, Qi Wang, Jiao Wang, Taxing Zhang, Xiangjiang Zhan, Shengkai Pan   +7 more
wiley   +1 more source

The In Vitro Inhibitory Activity of Pacaya Palm Rachis versus Dipeptidyl Peptidase-IV, Angiotensin-Converting Enzyme, α-Glucosidase and α-Amylase

Plants
The pacaya palm (Chamaedorea tepejilote Liebm) is an important food that is commonly consumed in Mexico and Central America due to its nutritive value.
Aurea Bernardino-Nicanor, Stephanie Fernández-Avalos, José Mayolo Simitrio Juárez-Goiz, José Luis Montañez-Soto, Leopoldo González-Cruz   +4 more
doaj   +1 more source

The Earliest Feathers from the Lower Cretaceous Dabeigou Formation of North Hebei: Implications for the Early Evolution of the Jehol Biota

Integrative Zoology, EarlyView.
This study reports two isolated feather fossils from the Lower Cretaceous Dabeigou Formation in northeastern China. Morphological analyses identified them as the earliest known feathered theropods (potentially including avian) in the Jehol Biota. This finding reveals a complex ecosystem at the dawn of the Jehol Biota, bridging the temporal and faunal ...
Qian Wu, Qian‐Nan Zhang, Dang‐Peng Xi   +2 more
wiley   +1 more source

Une cause rare de compression médullaire: kyste arachnoïdien épidural rachidien (à propos de 03 cas)

The Pan African Medical Journal, 2017
Le kyste arachnoïdien épidural rachidien (KAER) est une affection bénigne, de physiopathologie encore incertaine. Il est le plus souvent asymptomatique mais peut causer des séquelles neurologiques graves surtout quand le traitement n'est pas instauré à ...
Abderrazzak El Saqui, Mohamed Aggouri, Mohamed Benzagmou, Khalid Chakour, Mohamed El Faiz Chaoui   +4 more
doaj   +1 more source

Bridging the Late Antique Gap in Northwest Arabia: New Archaeological Evidence on the Occupation of Wādī al‐Qurā (al‐ʿUlā [AlUla], Saudi Arabia) Between the Third and Seventh Centuries CE

Arabian Archaeology and Epigraphy, EarlyView.
ABSTRACT In 2019, the Dadan Archaeological Project (CNRS/RCU/AFALULA) identified a Late Antique village 1 km south of ancient Dadan in the al‐ʿUlā valley (northwest Saudi Arabia). Three excavation seasons at this site (2021–2023) have uncovered a massive building constructed in the late third or early fourth cent.
Jérôme Rohmer, Abdulrahman Alsuhaibani, Charlène Bouchaud, Elora Chambraud, Vladimir Dabrowski, Hatem Djerbi, Fabien Lesguer, Hervé Monchot, Paul Picavet, Louise Purdue, Bertrand Riba, Shadi Shabo   +11 more
wiley   +1 more source

Analysis of Variations in White-Belly and White-Core Rice Kernels Within a Panicle and the Effect of Panicle Type

Journal of Integrative Agriculture, 2014
This study aims to investigate the variation in occurrence of white-belly rice kernel (WBRK) and white-core rice kernel (WCRK) among different positions within a panicle.
Xin-cheng ZHANG, Alim Md A., Zhao-miao LIN, Zheng-hui LIU, Gang-hua LI, Qiang-sheng WANG, Shao-hua WANG, Yan-feng DING   +7 more
doaj   +1 more source

The Late Agricultural Development of Central Arabian Oases—Archaeobotanical and Archaeozoological Studies of the al‐Kharj Oasis

Arabian Archaeology and Epigraphy, EarlyView.
ABSTRACT While oasis settlements emerged during the Bronze Age in Eastern and Northern Arabia, the settlement process in Central Arabia was different. Excavations at al‐Yamāma—main ancient settlement of the al‐Kharj oasis (Riyadh Province, KSA)—suggest that the latter did not emerge before the second half of the first millennium BCE.
Elora Chambraud, Hervé Monchot, Vladimir Dabrowski, Charlène Bouchaud, Jérémie Schiettecatte   +4 more
wiley   +1 more source