Diagnostic performance of Neutrophil CD64 index,procalcitonin,and C-reactive protein for early sepsis in hematological patients

BACKGROUND Patients with hematological diseases are immunosuppressed due to various factors,including the disease itself and treatments,such as chemotherapy and immunotherapy,and are susceptible to infection.Infections in these patients often progress rapidly to sepsis,which is life-threatening.AIM To evaluate the diagnostic efficacy of the neutrophil CD64(nCD64)index,compared to procalcitonin(PCT)and high-sensitivity C-reactive protein(hs-CRP),for the identification of early sepsis in patients with hematological diseases.METHODS This was a prospective analysis of patients with hematological diseases treated at the Fuxing Hospital affiliated with Capital Medical University,between March 2014 and December 2018.The nCD64 index was quantified by flow cytometry and the Leuko64 assay software.The factors which may affect the nCD64 index levels were compared between patients with different infection statuses(local infection,sepsis,and no infection),and the control group and the nCD64 index levels were compared among the groups.The diagnostic efficacy of the nCD64 index,PCT,and hs-CRP for early sepsis was evaluated among patients with hematological diseases.RESULTS A total of 207 patients with hematological diseases(non-infected group,n=50;locally infected group,n=67;sepsis group,n=90)and 26 healthy volunteers were analyzed.According to the absolute neutrophil count(ANC),patients with hematological diseases without infection were divided into the normal ANC,ANC reduced,and ANC deficiency groups.There was no statistically significant difference in the nCD64 index between these three groups(P=0.586).However,there was a difference in the nCD64 index among the non-infected(0.74±0.26),locally infected(1.47±1.10),and sepsis(2.62±1.60)groups(P<0.001).The area under the diagnosis curve of the nCD64 index,evaluated as the difference between the sepsis and locally infected group,0.777,which was higher than for PCT(0.735)and hs-CRP(0.670).The positive and negative likelihood ratios were also better for the nCD64 index than either PCT and hs-CRP.CONCLUSION Our results indicate the usefulness of the nCD64 index as an inflammatory marker of early sepsis in hematological patients.

Greatly enhanced solar absorption via high entropy ceramic AlCrTaTiZrN based solar selective absorber coatings

High entropy alloys(HEAs),which is at the expense of high cost compared to traditional alloy,should not be confined to the mechanical properties,but should be employed to devise a novel combination with unique functional and mechanical performances.In this work,high entropy alloy nitride(HEAN)is utilized as a novel double absorption layer to improve solar absorption in the high temperature solar selective absorbing coatings(SSACs).Our primary motivation is to lower thermal emittance(ε)and enhance solar absorptance(a).In order to realize this goal,coating design(CODE)software is employed to design and optimize the proposed HEAN based SSACs using appropriate dielectric function model.The ultimate as-deposited coating shows good optical properties with a high a value of 0.965 and a lowεvalue of 0.086(at 82C).The estimate of thermal stability tests indicates that HEAN based SSACs has the ability to resist instability in high working temperature,which keeps good optical properties(a¼0.925,ε¼0.070)after annealing at 600C for 10 h.

A novel multilayer high temperature solar absorber coating based on high-entropy alloy NbMoTaW:Optical properties, thermal stability and corrosion properties

With the development of new materials and technology,high entropy alloy(HEA)nitride films have attracted much attention of researchers due to their excellent optical properties and mechanical properties.Herein,a novel SS/NbMoTaWN(HEAN)/NbMoTaWON(HEAON)/SiO_(2) coatings are prepared,which shows a high spectral selectivity of a/ε=0.944/0.12.The preparation and optimization of the coating are studied by combining experiments with ellipsometric program and CODE software.High temperature thermal stability test is performed in depth,which proves that the coating could bear 400℃ in air for 2 h,and 600℃for 2 h in vacuum.Long-term thermal stability researches indicate that the SSACs still keep good optical properties(a=0.902,ε=0.106)even after annealing at 600℃ for 100 h.The failure mechanism is analyzed by XRD and Raman spectra.In addition,neutral salt spray test is performed to investigate the anti-corrosion ability,which indicates the coating has a good optical performance after soaking in 3.5 wt%NaCl solution for 30 days.Obviously,this work provides a new strategy to construct solar absorber coatings based on NbMoTaW high entropy alloy.