To study controlled evolution of nonautonomous matter-wave breathers and rogue waves in spinor Bose–Einstein condensates with spatiotemporal modulation,we focus on a system of three coupled Gross–Pitaevskii equation...To study controlled evolution of nonautonomous matter-wave breathers and rogue waves in spinor Bose–Einstein condensates with spatiotemporal modulation,we focus on a system of three coupled Gross–Pitaevskii equations with spacetime-dependent external potentials and temporally modulated gain-loss distributions.With different external potentials and gain-loss distributions,various solutions for controlled nonautonomous matterwave breathers and rogue waves are derived by the Darboux transformation method,such as breathers and rogue waves on arched and constant backgrounds which have the periodic and parabolic trajectories.Effects of the gain-loss distribution and linear potential on the breathers and rogue waves are studied.Nonautonomous two-breathers on the arched and constant backgrounds are also derived.展开更多
To fabricate an oil-water separation material that is rich in source,eco-friendly,and responsive,in this study,we successfully developed a collagen-based sponge for application to oil-water separation based on a green...To fabricate an oil-water separation material that is rich in source,eco-friendly,and responsive,in this study,we successfully developed a collagen-based sponge for application to oil-water separation based on a green and facile strategy.In this design,widely-available collagen(COL)was used as the substrate:it was immersed in polydimethylsiloxane(PDMS)suspension with candle soot(CS)nanoparticles,followed by hot curing.The resultant sponge(CS/PDMS-COL)possessed good hydrophobicity with a water contact angle of 148.3°under a low PDMS concentration of 2%.The results from field emission scanning electron microscope,Fourier transform infrared spectrometer,X-ray photoelectron spectrometer,and X-ray diffractometry demonstrated the successful coating of CS and PDMS on the surface of COL substrate.The CS/PDMS-COL can adsorb eight oils,with the adsorption capacity for trichloromethane reaching 95 g/g.With benzene as the target adsorbent,the separation efficiency was maintained at no less than 95%even after recycling 20 times.CS/PDMS-COL was also used to separate oil-in-water emulsion.Moreover,the sponge killed bacteria effectively due to its excellent near-infrared photothermal responsiveness.This study provides new insight into the preparation of facile oil-water separation materials based on naturally occurring biomaterials effortlessly.展开更多
This study aimed to investigate the status of and changes in the vaccination willingness of patients with breast cancer to increase the coronavirus disease 2019(COVID-19)vaccination rate among these patients.The first...This study aimed to investigate the status of and changes in the vaccination willingness of patients with breast cancer to increase the coronavirus disease 2019(COVID-19)vaccination rate among these patients.The first survey included patients fromthe FifthMedical Center of the PLA GeneralHospitalwho participated in the Society of ClinicalOncology Breast Cancer CommitteeNCP-02 study conducted from September 16 to December 31,2021.The second survey was conducted from December 9 to December 26,2022,for those who had not received vaccines previously.In total,266 patients completed two questionnaires.A total of 143 patients(53.8%)changed their willingness to receive the vaccination.Among them,45,who were initially unwilling to be vaccinated,changed their stance to become hesitant and 15 changed to become willing.Among those with hesitant attitudes toward vaccines,45 changed their stance to become willing,and 28 changed to become unwilling;10 patients with willing attitudes toward vaccines changed to become hesitant.Those who received surgery(odds ratio(OR),4.24;95%confidence interval(CI),1.45–12.42;P=0.01)andwho lived with older adults or children(OR,2.03;95%CI,1.13–3.62;P=0.02)were more likely to change their attitudes toward COVID-19 vaccines.This finding suggested that patients with breast cancer were cautious about receiving the COVID-19 vaccine.Multiple methods should be used to promote vaccination and reduce vaccine hesitancy.展开更多
The effects of concentration and sonication on the liquid crystalline phases of collagen were investigated by several methods,especially by the atomic force microscopy(AFM).The X-ray diffraction(XRD)results revealed t...The effects of concentration and sonication on the liquid crystalline phases of collagen were investigated by several methods,especially by the atomic force microscopy(AFM).The X-ray diffraction(XRD)results revealed that the triple-helical structure of the collagen was nearly unchanged after sonication.Moreover,the differential scanning calorimetry(DSC)examinations indicated that the thermal stability of the sonicated collagen was close to that of native collagen.The AFM observations showed that collagen with a concentration of 60 mg/mL had more ordered arrays compared to that of 30 mg/mL when both samples were treated by sonication.Furthermore,the 60 mg/mL collagen solution without sonication could still form pre-cholesteric patterns,while the liquid phase could not be observed for the 30 mg/mL collagen solution under the same conditions.Generally,AFM was an effective tool for the study of the liquid crystalline phases of collagen.展开更多
基金supported by the National Natural Science Foundation of China (Grant Nos.11975172 and 12261131495)。
文摘To study controlled evolution of nonautonomous matter-wave breathers and rogue waves in spinor Bose–Einstein condensates with spatiotemporal modulation,we focus on a system of three coupled Gross–Pitaevskii equations with spacetime-dependent external potentials and temporally modulated gain-loss distributions.With different external potentials and gain-loss distributions,various solutions for controlled nonautonomous matterwave breathers and rogue waves are derived by the Darboux transformation method,such as breathers and rogue waves on arched and constant backgrounds which have the periodic and parabolic trajectories.Effects of the gain-loss distribution and linear potential on the breathers and rogue waves are studied.Nonautonomous two-breathers on the arched and constant backgrounds are also derived.
基金the financial support provided by the National Natural Science Foundation of China (Grant Nos. 22178056 & 22078060)the Natural Science Foundation of Fujian Province (Grant Nos. 2020J01555 & 2020J01881)+1 种基金the Opening Project of Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control (2019KF09)Special Fund for Science and Technology Innovation of Fujian Agriculture and Forestry University (Grant Nos. CXZX2019108S & CXZX2019116G)
文摘To fabricate an oil-water separation material that is rich in source,eco-friendly,and responsive,in this study,we successfully developed a collagen-based sponge for application to oil-water separation based on a green and facile strategy.In this design,widely-available collagen(COL)was used as the substrate:it was immersed in polydimethylsiloxane(PDMS)suspension with candle soot(CS)nanoparticles,followed by hot curing.The resultant sponge(CS/PDMS-COL)possessed good hydrophobicity with a water contact angle of 148.3°under a low PDMS concentration of 2%.The results from field emission scanning electron microscope,Fourier transform infrared spectrometer,X-ray photoelectron spectrometer,and X-ray diffractometry demonstrated the successful coating of CS and PDMS on the surface of COL substrate.The CS/PDMS-COL can adsorb eight oils,with the adsorption capacity for trichloromethane reaching 95 g/g.With benzene as the target adsorbent,the separation efficiency was maintained at no less than 95%even after recycling 20 times.CS/PDMS-COL was also used to separate oil-in-water emulsion.Moreover,the sponge killed bacteria effectively due to its excellent near-infrared photothermal responsiveness.This study provides new insight into the preparation of facile oil-water separation materials based on naturally occurring biomaterials effortlessly.
基金supported by the Emergency Key Program of Guangzhou Laboratory(EKPG21-30-4)Beijing Science and Technology Plan(Z181100001718215).
文摘This study aimed to investigate the status of and changes in the vaccination willingness of patients with breast cancer to increase the coronavirus disease 2019(COVID-19)vaccination rate among these patients.The first survey included patients fromthe FifthMedical Center of the PLA GeneralHospitalwho participated in the Society of ClinicalOncology Breast Cancer CommitteeNCP-02 study conducted from September 16 to December 31,2021.The second survey was conducted from December 9 to December 26,2022,for those who had not received vaccines previously.In total,266 patients completed two questionnaires.A total of 143 patients(53.8%)changed their willingness to receive the vaccination.Among them,45,who were initially unwilling to be vaccinated,changed their stance to become hesitant and 15 changed to become willing.Among those with hesitant attitudes toward vaccines,45 changed their stance to become willing,and 28 changed to become unwilling;10 patients with willing attitudes toward vaccines changed to become hesitant.Those who received surgery(odds ratio(OR),4.24;95%confidence interval(CI),1.45–12.42;P=0.01)andwho lived with older adults or children(OR,2.03;95%CI,1.13–3.62;P=0.02)were more likely to change their attitudes toward COVID-19 vaccines.This finding suggested that patients with breast cancer were cautious about receiving the COVID-19 vaccine.Multiple methods should be used to promote vaccination and reduce vaccine hesitancy.
基金support from the National Natural Science Foundation of China (Grant No.21306024)the Natural Science Foundation of Fujian Province (Grant No.2016J01208)the Foundation of Distinguished Young Scholars of Fujian Agriculture and Forestry University (Grant No.XJQ201212).
文摘The effects of concentration and sonication on the liquid crystalline phases of collagen were investigated by several methods,especially by the atomic force microscopy(AFM).The X-ray diffraction(XRD)results revealed that the triple-helical structure of the collagen was nearly unchanged after sonication.Moreover,the differential scanning calorimetry(DSC)examinations indicated that the thermal stability of the sonicated collagen was close to that of native collagen.The AFM observations showed that collagen with a concentration of 60 mg/mL had more ordered arrays compared to that of 30 mg/mL when both samples were treated by sonication.Furthermore,the 60 mg/mL collagen solution without sonication could still form pre-cholesteric patterns,while the liquid phase could not be observed for the 30 mg/mL collagen solution under the same conditions.Generally,AFM was an effective tool for the study of the liquid crystalline phases of collagen.
