Deinonychosaur trackways in southeastern China record a possible giant troodontid.

The Longxiang tracksite (lower Upper Cretaceous, Shanghang Basin) includes twelve didactyl deinonychosaur tracks that fall into two morphologies, differentiated by both size and form. The smaller tracks (∼11 cm long) are referable to the ichnogenus . The larger tracks (∼36 cm long) establish the ichnotaxon .

Comparison of different internal fixation models in ankle arthrodesis using 3D finite-element analysis.

Background: The purpose of this study is to use three-dimensional finite-element analysis to better understand the biomechanical features of various internal fixators for ankle arthrodesis.

Methods: We used finite-element analysis to compare four different types of internal fixations in ankle arthrodesis: Group A had three crossed screws (Ø6.5 mm); Group B had two crossed screws (Ø6.

FOXC1 Promotes Osteoblastic Differentiation of Bone Marrow Mesenchymal Stem Cells via the Dnmt3b/CXCL12 Axis.

Bone defects have remained a clinical problem in current orthopedics. Bone marrow mesenchymal stem cells (BM-MSCs) with multi-directional differentiation ability have become a research hotspot for repairing bone defects. In vitro and in vivo models were constructed, respectively.

Retracted: A new aquatic beetle (Adephaga: Coptoclavidae) from the Middle Jurassic Daohugou Biota.

Tigrivia baii gen. et sp. nov.

Giant Jurassic dragon lacewing larvae with lacustrine palaeoecology represent the oldest fossil record of larval neuropterans.

Neuropterans seem to be less specious among holometabolans, while they are in fact the relicts of a diverse group from the Mesozoic era. Their early radiation resulted in great family level morphological heterogeneity of extant neuropterans, especially of their larvae. The earliest previously reported fossil larvae of this group were from the Early Cretaceous, where they already showed high taxonomic diversity and an extremely wide range of variations in morphotypes.

Hadrosauroid eggs and embryos from the Upper Cretaceous (Maastrichtian) of Jiangxi Province, China.

Background: Dinosaur eggs containing embryos are rare, limiting our understanding of dinosaur development. Recently, a clutch of subspherical dinosaur eggs was discovered while blasting for a construction project in the Upper Cretaceous red beds (Hekou Formation) of the Ganzhou Basin, Jiangxi Province, China. At least two of the eggs contain identifiable hadrosauroid embryos, described here for the first time.

Study on the Action Mechanism of Dkk-1, TGF-β1 and TNF-α Expression Levels in Dupuytren's Contracture.

Background: The biological mechanism of Dupuytren's contracture needs to be further studied in order to minimize postoperative recurrence and provide a pathological basis for the development of new therapeutic targets.

Methods: HE staining, immunohistochemistry, PCR and western blotting were performed in pathological palmar aponeurosis specimens and normal palmar aponeurosis tissues for comparative study.

Results: (1) TNF-α expression was up-regulated: TNF-α mRNA was more highly expressed in the pathological tissues of DD patients than in the CT group, P < 0.

An exquisitely preserved theropod dinosaur embryo sheds light on avian-like prehatching postures.

Despite the discovery of many dinosaur eggs and nests over the past 100 years, articulated embryos are remarkably rare. Here we report an exceptionally preserved, articulated oviraptorid embryo inside an elongatoolithid egg, from the Late Cretaceous Hekou Formation of southern China. The head lies ventral to the body, with the feet on either side, and the back curled along the blunt pole of the egg, in a posture previously unrecognized in a non-avian dinosaur, but reminiscent of a late-stage modern bird embryo.

The Treatment Experience of Different Types of Flaps for Repairing Soft Tissue Defects of the Heel.

Objective: To summarize the clinical application effects of three different types of flaps for repairing soft tissue defects of the heel, and to discuss the importance of tissue repair and heel reconstruction.

Methods: A total of 46 cases with skin tissue defects of the heel with deep tissue exposure were treated. The reasons for the defect were trauma (n = 26), burns and electric shocks (n = 12), chronic ulcers (n = 2), postoperative infection of the calcaneus and Achilles tendon (n = 5), and tumor resection (n = 1).

Lower cretaceous avian-dominated, theropod, thyreophoran, pterosaur and turtle track assemblages from the Tugulu Group, Xinjiang, China: ichnotaxonomy and palaeoecology.

Rich tetrapod ichnofaunas, known for more than a decade, from the Huangyangquan Reservoir (Wuerhe District, Karamay City, Xinjiang) have been an abundant source of some of the largest Lower Cretaceous track collections from China. They originate from inland lacustrine clastic exposures of the 581-877 m thick Tugulu Group, variously divided into four formations and subgroups in the northwestern margin of the Junggar Basin. The large Huangyangquan track assemblages occur in the Lower layer/Subgroup II.

An early Cambrian euarthropod with radiodont-like raptorial appendages.

Resolving the early evolution of euarthropods is one of the most challenging problems in metazoan evolution. Exceptionally preserved fossils from the Cambrian period have contributed important palaeontological data to deciphering this evolutionary process. Phylogenetic studies have resolved Radiodonta (also known as anomalocaridids) as the closest group to all euarthropods that have frontalmost appendages on the second head segment (Deuteropoda).

A mid-Cretaceous enantiornithine foot and tail feather preserved in Burmese amber.

Since the first skeletal remains of avians preserved in amber were described in 2016, new avian remains trapped in Cretaceous-age Burmese amber continue to be uncovered, revealing a diversity of skeletal and feather morphologies observed nowhere else in the Mesozoic fossil record. Here we describe a foot with digital proportions unlike any previously described enantiornithine or Mesozoic bird. No bones are preserved in the new specimen but the outline of the foot is recorded in a detailed skin surface, which is surrounded by feather inclusions including a partial rachis-dominated feather.

Inter-amphibian predation in the Early Cretaceous of China.

For most fossil taxa, dietary inference relies primarily on indirect evidence from jaw morphology and the dentition. In rare cases, however, preserved gut contents provide direct evidence of feeding strategy and species interaction. This is important in the reconstruction of food webs and energy flow through ancient ecosystems.

The effectiveness and safety of cervus and cucumis polypeptide injection in promoting fracture healing after bone fracture surgeries: Protocol for a systematic review and meta-analysis.

Background: Bone fractures are a common occurrence, and, according to clinical investigations, approximately 5% to 10% of patients with fractures will suffer from delayed healing or even non-healing. The high efficacy of traditional Chinese medicine in promoting fracture healing has been fully verified over a long history of diagnosis and treatment. Traditional Chinese medicine has a long history of applying Chinese herbs to treat fractures.

Effect of combination of nerve fragments with nerve growth factor in autologous epineurium small gap coaptation on peripheral nerve injury repair.

The aim of this study was to explore the effect of the combination of nerve fragments with nerve growth factor (NGF) on the repair of peripheral nerve injury through autologous epineurium small gap coaptation. A total of 150 male Sprague-Dawley rats weighing 200-250 g were divided into five groups randomly with 30 rats per group, including the following: a control group that was subjected to traditional end-to-end neuroanastomosis; an autologous epineurium small gap group that received autologous epineurium small gap coaptation suture; a nerve fragments group in which nerve fragments were added to the small gap; an NGF group in which NGF was added to the small gap; and an NGF combined with nerve fragments group in which both NGF and nerve fragments were added to the small gap. All groups were examined at 4, 6, and 8 weeks after the operation, respectively; furthermore, electroneurophysiological detection and histological observation were performed at 8 weeks.