Pre-existing immunity to SARS-CoV-2 associates with strong T cell responses induced by inactivated COVID-19 vaccines.

Individuals with a recent common cold coronavirus infection, which leads to pre-existing immunity against SARS-CoV-2, displayed a less severe course of COVID-19. However, the relationship between pre-existing immunity against SARS-CoV-2 and the inactivated-vaccine-induced immune response is still unknown. Here, 31 healthcare workers who received standard two doses of inactivated COVID-19 vaccines (Weeks 0 and 4, respectively) were enrolled, vaccine-induced neutralization and T cell responses were detected, and the correlation between the pre-existing SARS-CoV-2-specific immunity was analyzed.

Contribution of Different Phenotypes of Obesity to Metabolic Abnormalities from a Cross-Sectional Study in the Northwest China.

Background: This study has been conducted to explore the correlation between phenotypes of obesity and metabolic comorbidities.

Methods: This cross-sectional study recruited 14,724 adults aged ≥18 years with a randomized stratified sampling strategy. Obesity was classified into four types according to body mass index (BMI) and waist-to-height ratio (WHtR): normal weight with central obesity (NWCO) and without (NW) CO, and obese or overweight with (OBCO) and without (OB) central obesity.

Synthesis and characterization of promising insensitive energetic salts based on 3-amino-5-hydrazinopyrazole.

The development of green energetic materials is based on environmental friendliness, safety and performance improvement. It is of great significance to design and synthesize new nitrogen rich salts for a new generation of green energetic materials. In the present work, a series of 3-amino-5-hydrazinopyrazole energetic salts comprising energetic anions were synthesized and were characterized using elemental analysis, IR spectroscopy and differential scanning calorimetry (DSC).

Age distribution and age-related outcomes of olfactory neuroblastoma: a population-based analysis.

Objective: The objective of the study was to describe the age distribution and to evaluate the role of prognostic value of age on survival in patients diagnosed with olfactory neuroblastoma (ONB). A population-based retrospective analysis was conducted.

Materials And Methods: The population-based study of patients in the Surveillance, Epidemiology, and End Results (SEER) tumor registry, who were diagnosed with ONB from 1973 to 2014, were retrospectively analyzed.

The Sensing Properties of Single Y-Doped SnO Nanobelt Device to Acetone.

Pure SnO and Y-doped SnO nanobelts were prepared by thermal evaporation at 1350 °C in the presence of Ar carrier gas (30 sccm). The samples were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), energy dispersion spectrometer (EDS), X-ray photoelectron spectrometer (XPS), UV-Vis absorption spectroscopy, Raman spectroscopy, and Fourier transform infrared spectrum (FTIR). The sensing properties of the devices based on a single SnO nanobelt and Y-doped SnO nanobelt were explored to acetone, ethanol, and ethanediol.

[Phylogenetic comparison between Spirulina and Arthrospira based on 16S rRNA and rpoC1 gene].

Objective: Based on 16S rRNA and rpoC1 gene sequences, the phylogenetic relationship between Spirulina and Arthrospira were studied and compared.

Methods: We amplified, sequenced and analyzed 16S rRNA and rpoC1 of 84 strains. Then the phylogenetic trees were constructed and compared.

A Single Eu-Doped In₂O₃ Nanobelt Device for Selective H₂S Detection.

Eu-doped In₂O₃ nanobelts (Eu-In₂O₃ NBs) and pure In₂O₃ nanobelts (In₂O₃ NBs) are synthesized by the carbon thermal reduction method. Single nanobelt sensors are fabricated via an ion beam deposition system with a mesh-grid mask. The gas-sensing response properties of the Eu-In₂O₃ NB device and its undoped counterpart are investigated with several kinds of gases (including H₂S, CO, NO₂, HCHO, and C₂H₅OH) at different concentrations and different temperatures.

The influence of hypoglycemic drugs on exercise-mediated hypoglycemic effects in elderly type 2 diabetic patients.

Background: To evaluate the impact of different hypoglycemic drugs on exercise-mediated blood glucose (BG) reduction.

Methods: One-hundred and five retirees who were diagnosed with type 2 diabetes mellitus (T2DM) within a two-year period were included in this study. The participants were instructed to walk for 20 to 30 minutes at a moderate-speed (4.

Synthesis and Gas Sensing Properties of Single La-Doped SnO₂ Nanobelts.

Single crystal SnO2 nanobelts (SnO2 NBs) and La-SnO2 nanobelts (La-SnO2 NBs) were synthesized by thermal evaporation. Both a single SnO2 NB sensor and a single La-SnO2 NB sensor were developed and their sensing properties were investigated. It is found that the single La-SnO2 NB sensor had a high sensitivity of 8.

Draft genome sequence of cyanobacteria Arthrospira sp. TJSD091 isolated from seaside wetland.

The cyanobacteria TJSD091 strain, a member of the genus Arthrospira was isolated from seaside wetland in China, Bohai. The draft genome sequence of Arthrospira sp. TJSD091 with a genome size of approximately 6.

[Study on the mechanical properties of quartz fiber-reinforced composite for canal post].

Purpose: To study the mechanical properties of custom-made quartz fiber-reinforced epoxy resin composite for prefabricated post.

Methods: Composite rods of 5 experiment groups with different fiber contents were made of quartz fiber and epoxy resin.Flexural strengths, shear strengths and fiber contents were measured, corresponding elastic modulus were calculated, cross-section surface and fracture surface was viewed under SEM.