[Spatial Differentiation Characteristics of Soil Organic Carbon and Its Influencing Factors in Cultivated Land in Major Grain-producing Areas： A Case Study of Hebei Province].

Assessing the spatial differentiation characteristics of soil organic carbon （SOC） in cultivated land in major grain-producing areas is important for regional cultivated land quality management and national food security. We investigated 519 soil profiles of cultivated land in Hebei Province （0-120 cm equally divided into six layers）, and obtained 2961 samples. We used geostatistical methods and spatial exploratory analysis to reveal the spatial distribution pattern of SOC in cultivated land in Hebei Province and the impacts of climate, topography, geomorphology, soil properties, and anthropogenic use on the spatial distribution of SOC in cultivated land soils.

MXene VC-coated runway-type microfiber knot resonator for an all-optical temperature sensor.

We present an all-optical temperature sensor device made of an MXene VC integrated runway-type microfiber knot resonator (MKR) for the first time. MXene VC is coated on the surface of the microfiber by optical deposition. The experimental results show that the normalized temperature sensing efficiency is ∼1.

Novel liver vein deprivation technique that promotes increased residual liver volume (with video): A case report.

Background: Inadequate volume of future liver remnant (FLR) is a major challenge for hepatobiliary surgeons treating large or multiple liver tumors. As an alternative to associating liver partition and portal vein ligation (ALPPS) for staged hepatectomy and liver venous deprivation (LVD) using stage 1 interventional radiology for vascular embolization combined with stage 2 open liver resection have been used.

Case Summary: A novel modified LVD technique was performed in a patient with pancreatic neuroendocrine tumor with liver metastases by using stage 1 laparoscopic ligation of the right hepatic vein, right posterior portal vein, and short hepatic veins combined with local excision of three liver metastases in the left hemiliver.

Uncommon abdominal "egg-shelled" lesions mimic hepatic echinococcosis: Two cases report.

Background: Primary abdominal "egg-shelled" lesions with positive anti-echinococcus IgG antibody were misdiagnosed as echinococcosis.

Case Presentation: Herein we report two cases with primary abdominal "egg-shelled" lesions were misdiagnosed as echinococcosis. A 44-year-old woman presented to our department with a history of slight abdominal pain for 4 months.

Development and validation of MRI-based radiomics signatures models for prediction of disease-free survival and overall survival in patients with esophageal squamous cell carcinoma.

Objectives: To develop and validate an optimal model based on the 1-mm-isotropic-3D contrast-enhanced StarVIBE MRI sequence combined with clinical risk factors for predicting survival in patients with esophageal squamous cell carcinoma (ESCC).

Methods: Patients with ESCC at our institution from 2015 to 2017 participated in this retrospective study based on prospectively acquired data, and were randomly assigned to training and validation groups at a ratio of 7:3. Random survival forest (RSF) and variable hunting methods were used to screen for radiomics features and LASSO-Cox regression analysis was used to build three models, including clinical only, radiomics only and combined clinical and radiomics models, which were evaluated by concordance index (CI) and calibration curve.

Observation of electron beam moiré fringes in an image conversion tube.

An image conversion tube with a magnetic lens was designed to observe electron beam moiré fringes. Electron beam moiré fringes result from the interference between the photocathode and the anode meshes. The photocathode had a strip line structure with a spatial frequency of 10L/mm.

[Analysis of polyA, polyU and double-stranded complex polyA x polyU via Raman spectroscopy].

The Raman spectra of PolyA, PolyU and their double-stranded complex were measured, and the spectral changes upon the formation of double-stranded complex were studied. The experimental results show: (1) Under the experimental conditions used in the present work (0.14 mol x L(-1) NaCl, 1 mmol x L(-1) Tris solution, neutral pH and 15 degrees C), PolyU, PolyA and PolyA x PolyU occur as random-coiled, A-single-stranded helical and A-double-stranded helical conformations, respectively.