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This paper explores the diagnostic value of dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) for the prognosis of glioma, and judges the relevant factors affecting the prognosis of glioma. This paper used a Cox proportional hazards model to retrospectively analyze clinical data of 81 patients with complete neuroglioma from the same neurosurgery medical team from January 2012 to November 2018, including DCE-MRI data. To determine the prognostic factors, P < 0.05 was used as the statistical standard, and the survival curve of statistically significant factors was drawn by Kaplan-Meier method. The Cox proportional hazard model analysis showed the preoperative Karnofsky Performance Status Scale (KPS) score, age, tumor pathologic grade, postoperative radiotherapy, temozolomide use, and Ki-67 expression had an impact on the prognosis of patients with neuroglioma. Multivariate analysis and DCE-MRI data showed that age, tumor grade, preoperative KPS score, postoperative radiotherapy, and Ki-67 expression were prognostic factors for patients with glioma. The older the age, the higher the pathologic grade, the higher the Ki-67 expression level, and the lower the KPS score before surgery, the worse the prognosis. Postoperative radiotherapy and appropriate temozolomide chemotherapy will help improve the prognosis of patients with neuroglioma.

Copper/nickel coated graphite film/copper sandwich composite foils were fabricated by electro-deposition and subsequent vacuum hot pressing treatment. Intermediate nickel layers with different volume faction (5%, 10%, 15%, and 20%), which was calculated corresponds to the proportion between graphite film and Ni coating, were introduced to modify the interfacial bonding between graphite film and deposited copper. The effect of the vacuum hot pressing (VHP) parameters on the in-plane thermal conductivity (TC) was investigated systemically. The results showed that the existence of intermediate nickel layer could improve the interfacial bonding between graphite and copper, thus enhance the thermal conductivity of the fabricated composite foils. The maximum TC value of the composite foil (graphite volume fraction of 50 vol% with 10 vol% intermediate nickel layers) reached up to 1042.4 W m−1 K−1 after VHP treatment at the optimal process parameters (800 ℃, 60 min and 40 MPa). These composites possess higher in-plane thermal conductivities than graphite flake/copper composites due to well-controlled graphite/copper interfacial bonding and fabrication parameters.

The aim of the present study was to investigate the effects of microRNA-18a (miR-18a) on the invasiveness and metastasis of invasive meningiomas and the underlying mechanism. A total of 69 patients with meningiomas (30 patients in the invasive meningioma group and 39 patients in the non-invasive meningioma group) and 48 cases in the control group were enrolled. Samples of meningioma tissues, serum and cerebrospinal fluid were collected. Reverse transcription-quantitative polymerase chain reaction was performed to quantify the expression levels of hypoxia-inducible factor-1α (HIF-1α) mRNA and miR-18a. Western blot analysis was used to determine protein expression levels of HIF-1α. The expression levels of HIF-1α mRNA and protein in all three types of sample from the invasive meningioma group were significantly higher compared with those in the control and non-invasive meningioma groups (P

Thermal microbubbles generally grow directly from the heater and are spherical to minimize surface tension. We demonstrate a novel type of microbubble indirectly generated from a graphene oxide-microheater. Graphene oxide's photothermal properties allowed for efficient generation of a thermal gradient field on the microscale. A series of approximately ellipsoidal microbubbles were generated on the smooth microwire based on heterogeneous nucleation. Other dynamic behaviors induced by the microheater such as constant growth, directional transport and coalescence were also investigated experimentally and theoretically. The results are not only helpful for understanding the bubble dynamics but also useful for developing novel photothermal bubble-based devices.

This study makes a claim of utilizing the photothermal effect of graphene oxide nanosheets (GONs) to effectively produce various microbubbles in an optical microfiber system at infrared optical communications band. A low power continuous-wave light at wavelength of 1527-1566 nm was launched into the microfiber to form GONs-deposition which acted as a linear heat source for creating various microbubbles. Both thermal convection flow and optical gradient force were responsible for the driving force to assemble GONs onto the microfiber. This simple optical fiber system can be used for assembling other micro/nanoscale particles and biomolecules, which has prospective applications in sensing, microfluidics, virus detection, and other biochip techniques.