Concentration-Dependent Control of the Band Gap Energy of a Low-Dimensional Lepidocrocite Titanate.

Recently, we reported on the simple, scalable synthesis of quantum-confined one-dimensional (1D) lepidocrocite titanate nanofilaments (1DLs). Herein, we show, using solid-state UV-vis spectroscopy, that reducing the concentration of aqueous 1DL colloidal suspensions from 40 to 0.01 g/L increases the band gap energy and light absorption onset of dried filtered films from ≈3.

Surface Self-Diffusion Induced Sintering of Nanoparticles.

Despite the critical role of sintering phenomena in constraining the long-term durability of nanosized particles, a clear understanding of nanoparticle sintering has remained elusive due to the challenges in atomically tracking the neck initiation and discerning different mechanisms. Through the integration of in situ transmission electron microscopy and atomistic modeling, this study uncovers the atomic dynamics governing the neck initiation of Pt-Fe nanoparticles via a surface self-diffusion process, allowing for coalescence without significant particle movement. Real-time imaging reveals that thermally activated surface morphology changes in individual nanoparticles induce significant surface self-diffusion.

Pivotal Role of Surface Terminations in MXene Thermodynamic Stability.

MXenes, i.e., two-dimensional transition metal carbides and nitrides, have been reported as promising materials for various applications, including energy storage, biomedicine, and electronics.

Fourier-Transform Infrared Spectral Library of MXenes.

Fourier-transform infrared (FTIR) spectroscopy characterization is a powerful and easy-to-use technique frequently employed for the characterization and fingerprinting of materials. Although MXenes are a large and fastest growing family of inorganic 2D materials, the lack of systematic FTIR spectroscopy studies hinders its application to MXenes and often leads to misinterpretation of the results. In this study, we report experimental and calculated FTIR spectra of 12 most typical carbide and carbonitride MXenes with different compositions (5 transition metals) and all four basic structures, including TiCT , NbCT , MoCT , VCT , TiCT , TiCNT , MoTiCT , MoTiCT , NbCT , VCT , TaCT , and MoVCT .

Computationally Guided Synthesis of MXenes by Dry Selective Extraction.

MXenes are a rapidly growing family of 2D transition metal carbides and nitrides that are promising for various applications, including energy storage and conversion, electronics, and healthcare. Hydrofluoric-acid-based etchants are typically used for large-scale and high-throughput synthesis of MXenes, which also leads to a mixture of surface terminations that impede MXene properties. Herein, a computational thermodynamic model with experimental validation is presented to explore the feasibility of fluorine-free synthesis of MXenes with uniform surface terminations by dry selective extraction (DSE) from precursor MAX phases using iodine vapors.

Cyclin D1 overexpression enhances chemosensitivity to TPF chemotherapeutic agents via the caspase-3 pathway in oral cancer.

Induction chemotherapy has been previously demonstrated to downgrade locally advanced or aggressive cancers and increase the likelihood of primary lesion eradication. Based on our previous phase 3 trial on TPF (docetaxel, cisplatin and fluorouracil) induction chemotherapy in patients with oral squamous cell carcinoma (OSCC), in which short-term prognostic and predictive values of cyclin D1 expression were reported, the present study aimed to determine the long-term predictive value of cyclin D1 expression in the same patients with OSCC who were eligible to receive TPF induction chemotherapy. In addition, the present study investigated the potential association between cyclin D1 expression and chemosensitivity to TPF agents during OSCC cell intervention, and the underlying apoptotic mechanism of action.

Irradiation-Induced Extremes Create Hierarchical Face-/Body-Centered-Cubic Phases in Nanostructured High Entropy Alloys.

A nanoscale hierarchical dual-phase structure is reported to form in a nanocrystalline NiFeCoCrCu high-entropy-alloy (HEA) film via ion irradiation. Under the extreme energy deposition and consequent thermal energy dissipation induced by energetic particles, a fundamentally new phenomenon is revealed, in which the original single-phase face-centered-cubic (FCC) structure partially transforms into alternating nanometer layers of a body-centered-cubic (BCC) structure. The orientation relationship follows the Nishiyama-Wasser-man relationship, that is, (011) || ( 1¯1¯1) and [100] || [ 11¯0] .

[Evaluation of harmonic scalpel assisted extracapsular dissection for benign parotid tumors].

Purpose: To investigate the clinical outcomes and prognosis of harmonic scalpel assisted extracapsular dissection for benign parotid tumors.

Methods: A total of 132 patients with full medical archives who were diagnosed as benign parotid tumors from 3 medical centers were retrospectively analyzed. The included patients were divided into 3 groups according to tumor positions, namely, superficial pre-auricular, superficial tail, and deep lobe.

Local electronic descriptors for solute-defect interactions in bcc refractory metals.

The interactions between solute atoms and crystalline defects such as vacancies, dislocations, and grain boundaries are essential in determining alloy properties. Here we present a general linear correlation between two descriptors of local electronic structures and the solute-defect interaction energies in binary alloys of body-centered-cubic (bcc) refractory metals (such as W and Ta) with transition-metal substitutional solutes. One electronic descriptor is the bimodality of the d-orbital local density of states for a matrix atom at the substitutional site, and the other is related to the hybridization strength between the valance sp- and d-bands for the same matrix atom.

Clinical Application of Temporary External Fixator for Immediate Mandibular Reconstruction.

Immediate mandibular reconstruction is always necessary for the patients receiving segmental mandibulectomy to recover the facial contour and function of occlusion. When 3D modeling is unavailable, temporary external fixator is necessary to maintain the occlusion relationship and facial contour. In this study, we introduce the clinical application of temporary external fixator for immediate mandibular reconstruction in patients receiving segmental mandibulectomy, which consists of 2 anchor claws, 2 all-round retentive arms, and 1 central locking structure.

Reconstruction of Deep Circumflex Iliac Artery Free Flap for Multiple Recurrent Ameloblastoma in Mandible.

Ameloblastoma is the most common odontogenic tumor of epithelial origin. These tumors are benign in nature but have a high rate of recurrence and possible malignant development when treated inadequately. However, recurrent ameloblastomas in bone grafts are rare.

Disorder in MAX phases at the atomic scale.

Atomic disordering in materials alters their physical and chemical properties and can subsequently affect their performance. In complex ceramic materials, it is a challenge to understand the nature of structural disordering, due to the difficulty of direct, atomic-scale experimental observations. Here we report the direct imaging of ion irradiation-induced antisite defects in MAX phases using double C-corrected scanning transmission electron microscopy and provide compelling evidence of order-to-disorder phase transformations, overturning the conventional view that irradiation causes phase decomposition to binary fcc-structured MX.

[Clinical treatment and prognosis of 52 cases of neurinoma in parotid region].

Purpose: To investigate the clinical features, diagnosis, and treatment, as well as prognosis of neurinoma in parotid region, in order to provide references for clinical treatment.

Methods: Fifty-two cases of neurinoma in parotid region treated between June 2000 to December 2013 were retrospectively investigated, including their clinical characteristics, imaging examination, diagnosis, therapies and prognosis. SPSS13.

Co-expression of XIAP and CIAP1 Play Synergistic Effect on Patient's Prognosis in Head and Neck Cancer.

To explore the influence of chemotherapy on prognosis of Head and Neck Squamous Cell Carcinoma (HNSCC) and the relationship between XIAP and CIAP1 co-expression and the prognosis in HNSCC. 129 patients were recruited in our study, they were divided into two groups, neoadjuvant group (n = 60) and non-neoadjuvant group (n = 69). Expression level of XIAP and CIAP1 were examed in neoadjuvant group, and was correlated with clinical outcomes of the patients.

Elevated growth differentiating factor 15 expression predicts long-term benefit of docetaxel, cisplatin and 5-fluorouracil induction chemotherapy in patients with oral cancer.

Our previous phase 3 trial (NCT01542931) failed to demonstrate improved survival when docetaxel, cisplatin and 5-fluorouracil (TPF) induction chemotherapy was introduced prior to surgery and postoperative radiotherapy in patients with locally advanced oral squamous cell carcinoma (OSCC). The aim of the present study was to investigate the long-term predictive value of GDF15 expression for potential personalized treatment strategies in OSCC. A total of 256 patients with stage III/IVA OSCC from our phase 3 trial were enrolled in the present study.

[Clinical and pathological analysis of jaw ameloblastomas in 890 patients].

Purpose: To investigate the clinical and pathological features of jaw ameloblastomas in 890 patients, in order to provide reference for clinical diagnosis and treatment.

Methods: Eight hundred and ninty cases with jaw ameloblastomas treated in our department from January 2003 to June 2014 were retrospectively analyzed, including their gender, age, primary sites, pathological subtypes and therapies.

Results: The age of patients ranged from 6 to 101 years old, with a mean age of 40.

Nano-sized Superlattice Clusters Created by Oxygen Ordering in Mechanically Alloyed Fe Alloys.

Creating and maintaining precipitates coherent with the host matrix, under service conditions is one of the most effective approaches for successful development of alloys for high temperature applications; prominent examples include Ni- and Co-based superalloys and Al alloys. While ferritic alloys are among the most important structural engineering alloys in our society, no reliable coherent precipitates stable at high temperatures have been found for these alloys. Here we report discovery of a new, nano-sized superlattice (NSS) phase in ball-milled Fe alloys, which maintains coherency with the BCC matrix up to at least 913 °C.

Long-term results of a randomized phase III trial of TPF induction chemotherapy followed by surgery and radiation in locally advanced oral squamous cell carcinoma.

Previously, we conducted a randomized phase III trial of TPF (docetaxel, cisplatin, and 5-fluorouracil) induction chemotherapy in surgically managed locally advanced oral squamous cell carcinoma (OSCC) and found no improvement in overall survival. This study reports long-term follow-up results from our initial trial. All patients had clinical stage III or IVA locally advanced OSCC.

An osteochondroma of the mandibular condyle.

Objective: Osteochondroma is rarely seen in the facial region, especially around the condyle. Here, we report a case of condylar osteochondroma, aiming to assist the diagnosis and treatment of the tumor.

Methods: A case of osteochondroma of the left mandibular condyle in a 49-year-old man was presented.

An ectopic meningioma in nasal floor.

Objective: Primary ectopic meningioma is a rare tumor and is usually limited to the paravertebral soft tissues. The aim of this study was to assist in the diagnosis and treatment of the tumor.

Methods: A 16-year-old boy presented with a nasal floor mass.

[Clinical study of large mandibular odontogenic keratocystic tumours in adolescents treated by decompression].

Unlabelled: PUPPOSE: To evaluate the effect of decompression for large mandibular odontogenic keratocystic tumours in adolescents.

Methods: Fifteen cases of large odontogenic keratocystic tumours in mandible underwent decompression from Feb.2005 to Feb.

[Clinical study of the proportion of salivary gland tumors in the elder patients].

Purpose: To investigate the proportion of salivary gland tumors in the elder patients in the past ten years, in order to provide reference for clinical diagnosis and treatment.

Methods: The medical data of salivary gland tumors treated in our department from January 2000 to December 2009 were reviewed and analyzed. The changes of three periods between 21c10s, 20c90s and 20c80s were compared.

Randomized phase III trial of induction chemotherapy with docetaxel, cisplatin, and fluorouracil followed by surgery versus up-front surgery in locally advanced resectable oral squamous cell carcinoma.

Purpose: To evaluate induction chemotherapy with docetaxel, cisplatin, and fluorouracil (TPF) followed by surgery and postoperative radiotherapy versus up-front surgery and postoperative radiotherapy in patients with locally advanced resectable oral squamous cell carcinoma (OSCC).

Patients And Methods: A prospective open-label phase III trial was conducted. Eligibility criteria included untreated stage III or IVA locally advanced resectable OSCC.

Surgical management of solitary venous malformation in the midcheek region.

Objective: The aim of this study was to analyze a single institution's experience of solitary venous malformation (VM) in the midcheek region.

Study Design: From 2002 to 2009, a total of 10 consecutive patients with solitary venous malformation in the midcheek region were retrospectively analyzed. Clinical records were reviewed for patient demographic data, presenting symptoms and signs, imaging modalities used, histologic and immunohistochemical results, surgical data, and clinical outcomes.