Results 161 to 170 of about 7,991 (237)

Assessing the microstructure of simple rhamphothecae in chickens (Aves: Galliformes: Gallus gallus domesticus)

Journal of Anatomy, EarlyView.
Simple rhamphotheca are externally homogeneous but internally are composed of several corneous layers with varying hardness. Areas under more mechanical stress such as the rostral portion and the tomia are significantly harder than other areas. Abstract Corneous sheaths on the jaws of beaked tetrapods, or rhamphothecae, are classified as simple or ...
Khanh H. T. To, Michelle R. Stocker, Tobin L. Hieronymus   +2 more
wiley   +1 more source

Research on the integrated technology of bearing structure reconstruction and support control in high risk area of top coal roadway in thick coal seam. [PDF]

Sci Rep
Xiaokang S, Bacha S, Heng Z, Xiaojing L, Xiaozhen C, Kai W, Hua Z.   +6 more
europepmc   +1 more source

A bristle‐nosed Jurassic ray‐finned fish (Actinopterygii) bears true dermal odontodes on its snout

Journal of Anatomy, EarlyView.
Teeth show extreme diversity, including tooth‐like dermal odontodes or “skin teeth” in many extant fishes. We describe the anatomy of enlarged tubercles on the snout of Redfieldius, an extinct early Jurassic fish. We found that the tubercles in Redfieldius are dermal odontodes that evolved independently from those of living species. Abstract Comparison
Jack Stack, Ben T. Kligman, Maranda L. Stricklin   +2 more
wiley   +1 more source

Disaster causing mechanism and monitoring of dynamic and static load coupling of deep multi layer hard roof. [PDF]

Sci Rep
Fu X, Zeng L, Rong H, Zhang H, Liu T, Song J.   +5 more
europepmc   +1 more source

Computed tomography reveals multiple origins of extreme caudal vertebral pneumaticity in sauropod dinosaurs

Journal of Anatomy, EarlyView.
Here, we present novel CT scan data of caudal vertebrae of six Middle–Late Jurassic sauropods, representing several eusauropod lineages. We synthesise these new data with a comprehensive critical appraisal of purported external and internal evidence for caudal vertebral PSP in Sauropodomorpha.
Samantha L. Beeston, Daniela Schwarz, Paul Upchurch, Stephen F. Poropat, Patrick Asbach, Philip D. Mannion   +5 more
wiley   +1 more source

Study on the influence of periodic roof fracturing on the mechanical disturbance characteristics of coal and gas outburst behavior in the mining face. [PDF]

PLoS One
Zhang C, Chen Z, Wu X, Ma J, Chen J.
europepmc   +1 more source

Entangled Foodways and Livelihood Pathways: Cinnamon, State Interventions, and Everyday Life in Hmong Communities of Northern Vietnam

Journal of Agrarian Change, EarlyView.
ABSTRACT The agroecological practices of ethnic minority farmers in Vietnam's northern uplands are being reshaped by intersecting pressures of land‐use reform, market integration, and state‐backed crop promotion. Among Hmong communities in the south of Lào Cai Province (former Yên Bái Province) cinnamon was once valued primarily for its medicinal ...
Mélie Monnerat, Sarah Turner
wiley   +1 more source

Study on the mechanism and prevention techniques of dynamic disaster in nearly vertical extra-thick coal seams. [PDF]

Sci Rep
Zhang Y, Li Q, Li L, Zhang J, Liu C, Yue H.   +5 more
europepmc   +1 more source

Progressive damage mechanism and multiscale characterization of hard sandstone-coal composite structures under loading. [PDF]

PLoS One
Dang J, Tu M, Zhang X, Bu Q.
europepmc   +1 more source

Long‐term stability of conventional non‐regenerative periodontal treatment for furcation defects

Periodontology 2000, EarlyView.
Abstract Background Furcation involvement (FI) in multi‐rooted teeth poses significant challenges in periodontal therapy due to complex anatomy and difficulty in achieving effective maintenance. FI is associated with increased periodontal destruction, especially in sites with narrow furcation entrances and deep root concavities.
Guo‐Hao Lin, April Martinez, Vincent Li, Eric Lee, Kang‐Wei Tu, Richard Kao, Hom‐Lay Wang   +6 more
wiley   +1 more source