Proximity effects between superconductors and ferromagnets(SC/FM)hold paramount importance in comprehending the spin competition transpiring at their interfaces.This competition arises from the interplay between Coope...Proximity effects between superconductors and ferromagnets(SC/FM)hold paramount importance in comprehending the spin competition transpiring at their interfaces.This competition arises from the interplay between Cooper pairs and ferromagnetic exchange interactions.The proximity effects between transition metal nitrides(TMNs)are scarcely investigated due to the formidable challenges of fabricating high-quality SC/FM interfaces.We fabricated heterostructures comprising SC titanium nitride(TiN)and FM iron nitride(Fe_(3)N)with precise chemical compositions and atomically well-defined interfaces.The magnetoresistance of Fe_(3)N/TiN heterostructures shows a distinct magnetic anisotropy and strongly depends on the external perturbations.Moreover,the superconducting transition temperatureT_(C) and critical field of TiN experience notable suppression when proximity to Fe_(3)N.We observe the intriguing competition of interfacial spin orientations near𝑇T_(C)(∼1.25 K).These findings not only add a new materials system for investigating the interplay between superconductor and ferromagnets,but also potentially provide a building block for future research endeavors and applications in the realms of superconducting spintronic devices.展开更多
Highly efficient sheet-like BiPO4/zeolite and ball-flower-like BiPO4/zeolite had been successfully synthesized by a standard hydrothermal method. The addition of assistant reagent in the hydrothermal system is promisi...Highly efficient sheet-like BiPO4/zeolite and ball-flower-like BiPO4/zeolite had been successfully synthesized by a standard hydrothermal method. The addition of assistant reagent in the hydrothermal system is promising to obtain special morphology. The assistant reagent (EDTA) acts as a growth modifier of crystal. The possible formation mechanisms of sheet-like BiPO4/zeolite and ball-flower-like BiPO4/zeolite were schematically discussed. A detailed study of sheet-like BiPO4/zeolite and ball-flower-like BiPO4/zeolite impacted on the photodecoloration methylene blue (MB) solution showed that the composite had a highly reusable and stable property for long-run photocatalytic application. (C) 2016 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.展开更多
The probability distributions of wave characteristics from three groups of sampled ocean data with different significant wave heights have been analyzed using two transformation functions estimated by non-parametric a...The probability distributions of wave characteristics from three groups of sampled ocean data with different significant wave heights have been analyzed using two transformation functions estimated by non-parametric and parametric methods. The marginal wave characteristic distribution and the joint density of wave properties have been calculated using the two transformations, with the results and accuracy of both transformations presented here. The two transformations deviate slightly between each other for the calculation of the crest and trough height marginal wave distributions, as well as the joint densities of wave amplitude with other wave properties. The transformation methods for the calculation of the wave crest and trough height distributions are shown to provide good agreement with real ocean data. Our work will help in the determination of the most appropriate transformation procedure for the prediction of extreme values.展开更多
On March 11th 2005, the first flight of nongovernmental aviation company means the situation that state capital controls the whole Chinese civil aviation industry has been broken. The nongovernmental aviation companie...On March 11th 2005, the first flight of nongovernmental aviation company means the situation that state capital controls the whole Chinese civil aviation industry has been broken. The nongovernmental aviation companies must face financing problem during their growing process unavoidably. Moreover, compared with other aviation companies in the world, the financing environment of nongovernmental aviation companies in China is very special. This paper has discussed the particularity of nongovernmental aviation companies＇ financing environment in China, and brought out some advice from the angles of government and nongovernmental aviation companies.展开更多
According to the modem management theories and the characters of industrial estate land development project, this paper studies the after-evaluation＇s content and method of industrial estate land development project ...According to the modem management theories and the characters of industrial estate land development project, this paper studies the after-evaluation＇s content and method of industrial estate land development project and puts forward the index system of course after-evaluation, finance after-evaluation and society after-evaluation. Moreover, this paper also brings forward the method and model of synthetic after-evaluation.展开更多
Accurate assessment of canopy carotenoid content(CC_(x+c)C)in crops is central to monitor physiological conditions in plants and vegetation stress,and consequently supporting agronomic decisions.However,due to the ove...Accurate assessment of canopy carotenoid content(CC_(x+c)C)in crops is central to monitor physiological conditions in plants and vegetation stress,and consequently supporting agronomic decisions.However,due to the overlap of absorption peaks of carotenoid(C_(x+c))and chlorophyll(C_(a+b)),accurate estimation of carotenoid using reflectance where carotenoid absorb is challenging.The objective of present study was to assess CC_(x+c)C in winter wheat(Triticum aestivum L.)with ground-and aircraft-based hyperspectral measurements in the visible and near-infrared spectrum.In-situ hyperspectral reflectance were measured and airborne hyperspectral data were acquired during major growth stages of winter wheat in five consecutive field experiments.At the canopy level,a remarkable linear relationship(R^(2)=0.95,p<0.001)existed between C_(x+c) and Ca+b,and correlation between CC_(x+c)C and wavelengths within 400 to 1000 nm range indicated that CC_(x+c)C could be estimated using reflectance ranging from visible to near-infrared wavebands.Results of Cx+c assessment based on chlorophyll and carotenoid indices showed that red edge chlorophyll index(CI red edge)performed with the highest accuracy(R^(2)=0.77,RMSE=22.27μg/cm^(2),MAE=4.97μg/cm^(2)).Applying partial least square regression(PLSR)in CC_(x+c)C retrieval emphasized the significance of reflectance within 700 to 750 nm range in CC_(x+c)C assessment.Based on CI red edge index,use of airborne hyperspectral imagery achieved satisfactory results in mapping the spatial distribution of CC_(x+c)C.This study demonstrates that it is feasible to accurately assess CC_(x+c)C in winter wheat with red edge chlorophyll index provided that C_(x+c) correlated well with C_(a+b) at the canopy scale.it is therefore a promising method for CC_(x+c)C retrieval at regional scale from aerial hyperspectral imagery.展开更多
BACKGROUND This is the first documentation of a spontaneous and nonspecific chemical reaction of an iodinated contrast media with ammonium persulfate used in As3+-Ce4+catalytic spectrophotometry for urine iodine conce...BACKGROUND This is the first documentation of a spontaneous and nonspecific chemical reaction of an iodinated contrast media with ammonium persulfate used in As3+-Ce4+catalytic spectrophotometry for urine iodine concentration(UIC)detection.CASE SUMMARY We herein report an incidental case who had a dual source computed tomography examination for papillary thyroid carcinoma diagnosis.Serial spot urine specimens were collected during her hospitalization and were measured by As3+-Ce4+catalytic spectrophotometry on a Beckman Coulter AU5800.The reacted solutions were“brownish”,and the results showed extremely high iodine concentrations despite serial dilutions.The patient claimed no dietary habit of iodized salt or iodine-containing medical history,which strongly pointed to iodinated contrast media(ICM)via intravenous injection.Even with 0.01%ICM,its interruption is still profound on the desired urine iodine reaction with ammonium persulfate,leading to inaccurate UIC and possibly inappropriate treatment.CONCLUSION The following laboratory suggestions should be considered:(1)As3+-Ce4+catalytic spectrophotometry is only suitable for UIC measurement after confirmed ICM renal clearance;(2)A mass spectrometry-based method can be applied as an alternative during the ICM clearance period;and(3)The UIC baseline can be confirmed after ICM injection by consecutive detection for at least 2 mo.展开更多
With the rapid increase in farmers' income and the rapid development of tourism,the tourism demand of farmers is increasingly growing,but the development of tourism market for farmers has not been given much atten...With the rapid increase in farmers' income and the rapid development of tourism,the tourism demand of farmers is increasingly growing,but the development of tourism market for farmers has not been given much attention. This paper summarized the overall situation of development of the farmer tourism,analyzed the consumption characteristics and supply characteristics of the farmer tourism in depth,and discussed the development potential of the farmer tourism. On the basis of discussion and analysis,it came up with recommendations including attaching greater importance to the farmer tourism market,developing marketable products,changing the traditional concept of consumption and enhancing tourism promotion activities,in the hope that both the government and enterprises pay more attention to the farmer tourism market.展开更多
As an important old industrial base in Northeast China,Liaoning Province is facing good opportunities for development in the context of rural tourism booming. This paper summarizes the concept and function of rural to...As an important old industrial base in Northeast China,Liaoning Province is facing good opportunities for development in the context of rural tourism booming. This paper summarizes the concept and function of rural tourism,analyzes the present situation and characteristics of rural tourism development in Liaoning Province,and points out the main problems. Finally,to make Liaoning's rural tourism develop better and faster and provide a reference for other regions,the following recommendations are made: focusing on the development of experiencebased rural tourism products; improving the level of rural tourism service and reception; strengthening the construction and renovation of rural tourism infrastructure.展开更多
Cadmium(Cd)and excess molybdenum(Mo)pose serious threats to animal health.Our previous study has determined that Cd and/or Mo exposure can cause ovarian damage of ducks,while the specific mechanism is still obscure.To...Cadmium(Cd)and excess molybdenum(Mo)pose serious threats to animal health.Our previous study has determined that Cd and/or Mo exposure can cause ovarian damage of ducks,while the specific mechanism is still obscure.To further investigate the toxic mechanism of Cd and Mo co-exposure in the ovary,forty 8-day-old female ducks were randomly allocated into four groups for 16 weeks,and the doses of Cd and Mo in basic diet per kg were as follows:control group,Mo group(100 mg Mo),Cd group(4 mg Cd),and Mo+Cd group(100 mg Mo+4 mg Cd).Cadmium sulfate 8/3-hydrate(CdSO_(4)·8/3H_(2)O)and hexaammonium molybdate((NH_(4))_(6)Mo_(7)O_(24)·4H_(2)O)were the origins of Cd and Mo,respectively.At the 16th week of the experiment,all ovary tissues were collected for the detection of related indexes.The data indicated that Mo and/or Cd induced trace element disorders and Th1/Th2 balance to divert toward Th1 in the ovary,which activated endoplasmic reticulum(ER)stress and then provoked necroptosis through triggering RIPK1/RIPK3/MLKL signaling pathway,and eventually caused ovarian pathological injuries and necroptosis characteristics.The alterations of above indicators were most apparent in the joint group.Above all,this research illustrates that Mo and/or Cd exposure can initiate necroptosis through Th1/Th2 imbalance-modulated ER stress in duck ovaries,and Mo and Cd combined exposure aggravates ovarian injuries.This research explores the molecular mechanism of necroptosis caused by Mo and/or Cd,which reveals that ER stress attenuation may be a therapeutic target to alleviate necroptosis.展开更多
Oxide semimetals exhibiting both nontrivial topological characteristics stand as exemplary parent compounds and multiple degrees of freedom,offering a promise for the realization of novel electronic states.In this wor...Oxide semimetals exhibiting both nontrivial topological characteristics stand as exemplary parent compounds and multiple degrees of freedom,offering a promise for the realization of novel electronic states.In this work,we report the structural and transport phase transition in an oxide semimetal,SrNbO_(3),achieved through effective anion doping.Notably,the resistivity increased by more than three orders of magnitude at room temperature upon nitrogendoping.The extent of electronic modulation in SrNbO_(3)is strongly correlated with misfit strain,underscoring its phase instability to both chemical doping and crystallographic symmetry variations.Using first-principles calculations,we discern that elevating the level of nitrogen doping induces an upward shift in the conductive bands of SrNbO_(3−δ)N_(δ).Consequently,a transition from a metallic state to an insulating state becomes apparent as the nitrogen concentration reaches a threshold of 1/3.This investigation shows effective anion engineering in oxide semimetals,offering pathways for manipulating their physical properties.展开更多
Aims:Surveys and research on the applications of the hepatic venous pressure gradient(HVPG)are important for understanding the current status and future development of this technology in China.This article aimed to in...Aims:Surveys and research on the applications of the hepatic venous pressure gradient(HVPG)are important for understanding the current status and future development of this technology in China.This article aimed to investigate the status of hepatic venous pressure gradient measurement in China in 2022.Methods:We investigated the overall status of HVPG technology in China-including hospital distribution,hospital level,annual number of cases,catheters used,average cost,indications,and current challenges by using online questionnaire.By counting the number and percentages of cases of these results,we hope to clarify the current status of HVPG measurements in China.Results:According to the survey,85 hospitals in China used HVPG technology in 2022 distributed across 29 provinces.A total of 4989 HVPG measurements were performed in all of the surveyed hospitals in 2022,of which 2813 cases(56.4%)were measured alone.The average cost of HVPG measurement was 5646.8±2327.9 CNY.Of the clinical teams who performed the measurements(sometimes multiple per hospital),94.3%(82/87)used the balloon method,and the majority of the teams(72.4%,63/87)used embolectomy catheters.Conclusions:This survey clarified the clinical application status of HVPG in China and confirmed that some medical institutions in China have established a foundation for this technology.It is still necessary to continue promoting and popularizing this technology in the future.展开更多
Inflammation drives the development of depression and may affect neurotransmitters and thus neurocircuits increase the risk of depression.To investigate the influence of inhibition of inflammatory pathways on the biog...Inflammation drives the development of depression and may affect neurotransmitters and thus neurocircuits increase the risk of depression.To investigate the influence of inhibition of inflammatory pathways on the biogenic amine neurotransmitters metabolism in depressive rats,sertraline,and meloxicam,the inhibitors of arachidonic acid-cyclooxygenase-2/lipoxygenase(AA-COX-2/5-LO)pathways,were given to depressive rats.After the development of depression model by chronic unpredictable mild stress(CUMS)for 6 weeks,Successful modeling rats were selected and randomly divided into CUMS group and medication administration group.After given medicine,The biogenic amine neurotransmitters in rat cortex and hippocampus were measured by high-performance liquid chromatography equipped with an electrochemical detector(HPLC-ECD).Compared with the normal group,the concentration of norepinephrine(NE)significantly decreased and the concentrations of Tyrosine(Tyr),Tryptophan(Trp),3,4-dihydroxyphenyl acetic acid(DOPAC),3-methoxy-4-hydroxyphenylglycol(MHPG),homovanillic acid(HVA)and 5-hydroxyindoleacetic acid(5-HIAA)significantly increased in the CUMS group.Sertraline significantly inhibited the elevation of 5-HIAA.Meloxicam inhibited the decrease of NE level in CUMS-induced rat and the increase of Trp,MHPG,and 5-HIAA level in a dose-dependent manner.Caffeic acid inhibited the decrease of NE and the increase of Trp and MHPG in a dose-dependent manner.The inhibition of AA-COX-2/5-LO pathways can improve the behaviors of depression rats and suppress CUMSinduced changes in biogenic amines.Compared with the single-dose lipoxygenase(5-LO)or Cyclooxygenase-2(COX-2)inhibitor,the combination treatment with meloxicam 1 mg/kg and caffeic acid 10 mg/kg have no significant improvement in CUMS-induced depression behavior and the level of cortical monoamine neurotransmitters and their metabolites.展开更多
The main active components of Rhubarb are anthraquinones（AQs）, most of which are glycosides and others are free. The concentrations of AQs derivatives（rhein, aloe-emodin, emodin, chrysophanol and physcion） in plas...The main active components of Rhubarb are anthraquinones（AQs）, most of which are glycosides and others are free. The concentrations of AQs derivatives（rhein, aloe-emodin, emodin, chrysophanol and physcion） in plasma and homogenate were assayed with a high performance liquid chromatography（HPLC） method. The pharmacokinetic parameters and distribution of Rhubarb AQs in rabbits or rats were studied after administration of different formulas. Elimination of AQs was fit to a two-compartment model in rats and rabbits. There were no significant difference in the main pharmacokinetic parameters between rhein and AQs in rats. AQs were distributed progressively in the kidney, liver, blood, and heart. The AQs were mainly composed of rhein in vivo and was excreted by the kidney. For formulas that contained Rhubarb, rhein could be used as a probe for in vivo pharmacokinetic studies.展开更多
The zero-valent iron modified biochar materials are widely employed for heavy metals immobilization.However,these materials would be inevitably aged by natural forces after entering into the environment,while there ar...The zero-valent iron modified biochar materials are widely employed for heavy metals immobilization.However,these materials would be inevitably aged by natural forces after entering into the environment,while there are seldom studies reported the aging effects of zero-valent iron modified biochar.In this work,the hydrogen peroxide and hydrochloric acid solution were applied to simulate aging conditions of zero-valent iron modified biochar.According to the results,the adsorption capacity of copper(II)contaminants on biochar,zero-valent iron modified biochar-1,and zero-valent iron modified biochar-2 after aging was decreased by 15.36%,22.65%and 23.26%,respectively.The surface interactions were assigned with chemisorption occurred on multi-molecular layers,which were proved by the pseudo-second-order and Langmuir models.After aging,the decreasing of capacity could be mainly attributed to the inhibition of ion-exchange and zero-valent iron oxidation.Moreover,the plant growth and soil leaching experiments also proved the effects of aging treatment,the zero-valent iron modified biochar reduced the inhibition of copper(II)bioavailability and increased the mobility of copper(II)after aging.All these results bridged the gaps between bio-adsorbents customization and their environmental behaviors during practical agro-industrial application.展开更多
At ToSC 2019,Ankele et al.proposed a novel idea for constructing zero-correlation linear distinguishers in a related-tweakey model.This paper further clarifies this principle and gives a search model for zero-correlat...At ToSC 2019,Ankele et al.proposed a novel idea for constructing zero-correlation linear distinguishers in a related-tweakey model.This paper further clarifies this principle and gives a search model for zero-correlation distin-guishers.As a result,for the first time,the authors construct 14-round and 16-round zero-correlation linear distinguishers for SKINNY-n-2n and SKINNY-n-3n,respectively,which are both two rounds longer than Anekele et al.'s.Based on these distinguishers,the paper presents related-tweakey zero-correlation linear attacks on 21-round SKINNY-n-2n and 25-round SKINNY-n-3n,respectively.展开更多
Erratum to:Front.Comput.Sci.,2023,17(4):174808.DOI 10.1007/s11704-022-2206-2.The conditions of Proposition 3 in this paper are insufficient.The proposition is corrected as follows.Proposition 3 Given a pair of input p...Erratum to:Front.Comput.Sci.,2023,17(4):174808.DOI 10.1007/s11704-022-2206-2.The conditions of Proposition 3 in this paper are insufficient.The proposition is corrected as follows.Proposition 3 Given a pair of input plaintext and output masks(Γ_(0),Γ_(r))of the r-round block cipher SKINNY-n-pn,for any linear trail Γ of the linear approximation Γ_(0)→Γ_(r) and for the cell position i,if the number of nonzero elements in its Γ sequence is greater than 0 and less than p+1,then the cipher has a zero-correlation linear hull.展开更多
基金supported by the National Key Research and Development Program of China(Grant Nos.2020YFA0309100 and 2019YFA0308500)the National Natural Science Foundation of China(Grant Nos.U22A20263,52250308,and 11974390)+3 种基金the CAS Project for Young Scientists in Basic Research(Grant No.YSBR-084)(E.J.G.)Special Research Assistant(Q.J.),the Strategic Priority Research Program(B)of the Chinese Academy of Sciences(Grant No.XDB33030200)(K.J.)the China Postdoctoral Science Foundation(Grant No.2022M723353)the Guangdong-Hong Kong-Macao Joint Laboratory for Neutron Scattering Science and Technology(Grant No.HTCSNS-DG-CD-0080/2021).
文摘Proximity effects between superconductors and ferromagnets(SC/FM)hold paramount importance in comprehending the spin competition transpiring at their interfaces.This competition arises from the interplay between Cooper pairs and ferromagnetic exchange interactions.The proximity effects between transition metal nitrides(TMNs)are scarcely investigated due to the formidable challenges of fabricating high-quality SC/FM interfaces.We fabricated heterostructures comprising SC titanium nitride(TiN)and FM iron nitride(Fe_(3)N)with precise chemical compositions and atomically well-defined interfaces.The magnetoresistance of Fe_(3)N/TiN heterostructures shows a distinct magnetic anisotropy and strongly depends on the external perturbations.Moreover,the superconducting transition temperatureT_(C) and critical field of TiN experience notable suppression when proximity to Fe_(3)N.We observe the intriguing competition of interfacial spin orientations near𝑇T_(C)(∼1.25 K).These findings not only add a new materials system for investigating the interplay between superconductor and ferromagnets,but also potentially provide a building block for future research endeavors and applications in the realms of superconducting spintronic devices.
基金financial support from the Natural Science Foundation of Tianjin(no.11JCYBJC27000)
文摘Highly efficient sheet-like BiPO4/zeolite and ball-flower-like BiPO4/zeolite had been successfully synthesized by a standard hydrothermal method. The addition of assistant reagent in the hydrothermal system is promising to obtain special morphology. The assistant reagent (EDTA) acts as a growth modifier of crystal. The possible formation mechanisms of sheet-like BiPO4/zeolite and ball-flower-like BiPO4/zeolite were schematically discussed. A detailed study of sheet-like BiPO4/zeolite and ball-flower-like BiPO4/zeolite impacted on the photodecoloration methylene blue (MB) solution showed that the composite had a highly reusable and stable property for long-run photocatalytic application. (C) 2016 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.
基金Supported by the Marine Engineering Equipment Scientific Research Project of Ministry of Industry and Information Technology of PRCthe National Science and Technology Major Project of China(Grant No.2016ZX05057020)National Natural Science Foundation of China(Grant No.51809067)
文摘The probability distributions of wave characteristics from three groups of sampled ocean data with different significant wave heights have been analyzed using two transformation functions estimated by non-parametric and parametric methods. The marginal wave characteristic distribution and the joint density of wave properties have been calculated using the two transformations, with the results and accuracy of both transformations presented here. The two transformations deviate slightly between each other for the calculation of the crest and trough height marginal wave distributions, as well as the joint densities of wave amplitude with other wave properties. The transformation methods for the calculation of the wave crest and trough height distributions are shown to provide good agreement with real ocean data. Our work will help in the determination of the most appropriate transformation procedure for the prediction of extreme values.
文摘On March 11th 2005, the first flight of nongovernmental aviation company means the situation that state capital controls the whole Chinese civil aviation industry has been broken. The nongovernmental aviation companies must face financing problem during their growing process unavoidably. Moreover, compared with other aviation companies in the world, the financing environment of nongovernmental aviation companies in China is very special. This paper has discussed the particularity of nongovernmental aviation companies＇ financing environment in China, and brought out some advice from the angles of government and nongovernmental aviation companies.
文摘According to the modem management theories and the characters of industrial estate land development project, this paper studies the after-evaluation＇s content and method of industrial estate land development project and puts forward the index system of course after-evaluation, finance after-evaluation and society after-evaluation. Moreover, this paper also brings forward the method and model of synthetic after-evaluation.
基金supported by the Fundamental Research Funds for the Provincial Universities of Zhejiang(Project No.GK229909299001-302)the National Natural Science Foundation of China(Project No.41901268)+1 种基金the Natural Science Foundation of Zhejiang Province(Project No.LQ19D010009)the Provincial Education Department General Scientific Research Items(Project No.Y202249845).
文摘Accurate assessment of canopy carotenoid content(CC_(x+c)C)in crops is central to monitor physiological conditions in plants and vegetation stress,and consequently supporting agronomic decisions.However,due to the overlap of absorption peaks of carotenoid(C_(x+c))and chlorophyll(C_(a+b)),accurate estimation of carotenoid using reflectance where carotenoid absorb is challenging.The objective of present study was to assess CC_(x+c)C in winter wheat(Triticum aestivum L.)with ground-and aircraft-based hyperspectral measurements in the visible and near-infrared spectrum.In-situ hyperspectral reflectance were measured and airborne hyperspectral data were acquired during major growth stages of winter wheat in five consecutive field experiments.At the canopy level,a remarkable linear relationship(R^(2)=0.95,p<0.001)existed between C_(x+c) and Ca+b,and correlation between CC_(x+c)C and wavelengths within 400 to 1000 nm range indicated that CC_(x+c)C could be estimated using reflectance ranging from visible to near-infrared wavebands.Results of Cx+c assessment based on chlorophyll and carotenoid indices showed that red edge chlorophyll index(CI red edge)performed with the highest accuracy(R^(2)=0.77,RMSE=22.27μg/cm^(2),MAE=4.97μg/cm^(2)).Applying partial least square regression(PLSR)in CC_(x+c)C retrieval emphasized the significance of reflectance within 700 to 750 nm range in CC_(x+c)C assessment.Based on CI red edge index,use of airborne hyperspectral imagery achieved satisfactory results in mapping the spatial distribution of CC_(x+c)C.This study demonstrates that it is feasible to accurately assess CC_(x+c)C in winter wheat with red edge chlorophyll index provided that C_(x+c) correlated well with C_(a+b) at the canopy scale.it is therefore a promising method for CC_(x+c)C retrieval at regional scale from aerial hyperspectral imagery.
基金Supported by the“The Six Top Talent Project”of Jiangsu Province,No.WSW-004the Key Laboratory for Laboratory Medicine of Jiangsu Province of China,No.ZDXKB2016005。
文摘BACKGROUND This is the first documentation of a spontaneous and nonspecific chemical reaction of an iodinated contrast media with ammonium persulfate used in As3+-Ce4+catalytic spectrophotometry for urine iodine concentration(UIC)detection.CASE SUMMARY We herein report an incidental case who had a dual source computed tomography examination for papillary thyroid carcinoma diagnosis.Serial spot urine specimens were collected during her hospitalization and were measured by As3+-Ce4+catalytic spectrophotometry on a Beckman Coulter AU5800.The reacted solutions were“brownish”,and the results showed extremely high iodine concentrations despite serial dilutions.The patient claimed no dietary habit of iodized salt or iodine-containing medical history,which strongly pointed to iodinated contrast media(ICM)via intravenous injection.Even with 0.01%ICM,its interruption is still profound on the desired urine iodine reaction with ammonium persulfate,leading to inaccurate UIC and possibly inappropriate treatment.CONCLUSION The following laboratory suggestions should be considered:(1)As3+-Ce4+catalytic spectrophotometry is only suitable for UIC measurement after confirmed ICM renal clearance;(2)A mass spectrometry-based method can be applied as an alternative during the ICM clearance period;and(3)The UIC baseline can be confirmed after ICM injection by consecutive detection for at least 2 mo.
基金Supported by Scientific Research Foundation of Liaoning Provincial Department of Education(2016FRPY02)
文摘With the rapid increase in farmers' income and the rapid development of tourism,the tourism demand of farmers is increasingly growing,but the development of tourism market for farmers has not been given much attention. This paper summarized the overall situation of development of the farmer tourism,analyzed the consumption characteristics and supply characteristics of the farmer tourism in depth,and discussed the development potential of the farmer tourism. On the basis of discussion and analysis,it came up with recommendations including attaching greater importance to the farmer tourism market,developing marketable products,changing the traditional concept of consumption and enhancing tourism promotion activities,in the hope that both the government and enterprises pay more attention to the farmer tourism market.
基金Supported by Research Project of Liaoning Provincial Department of Education(2016FRPY02)
文摘As an important old industrial base in Northeast China,Liaoning Province is facing good opportunities for development in the context of rural tourism booming. This paper summarizes the concept and function of rural tourism,analyzes the present situation and characteristics of rural tourism development in Liaoning Province,and points out the main problems. Finally,to make Liaoning's rural tourism develop better and faster and provide a reference for other regions,the following recommendations are made: focusing on the development of experiencebased rural tourism products; improving the level of rural tourism service and reception; strengthening the construction and renovation of rural tourism infrastructure.
基金supported by the National Natural Science Foundation of China(No.31960722)。
文摘Cadmium(Cd)and excess molybdenum(Mo)pose serious threats to animal health.Our previous study has determined that Cd and/or Mo exposure can cause ovarian damage of ducks,while the specific mechanism is still obscure.To further investigate the toxic mechanism of Cd and Mo co-exposure in the ovary,forty 8-day-old female ducks were randomly allocated into four groups for 16 weeks,and the doses of Cd and Mo in basic diet per kg were as follows:control group,Mo group(100 mg Mo),Cd group(4 mg Cd),and Mo+Cd group(100 mg Mo+4 mg Cd).Cadmium sulfate 8/3-hydrate(CdSO_(4)·8/3H_(2)O)and hexaammonium molybdate((NH_(4))_(6)Mo_(7)O_(24)·4H_(2)O)were the origins of Cd and Mo,respectively.At the 16th week of the experiment,all ovary tissues were collected for the detection of related indexes.The data indicated that Mo and/or Cd induced trace element disorders and Th1/Th2 balance to divert toward Th1 in the ovary,which activated endoplasmic reticulum(ER)stress and then provoked necroptosis through triggering RIPK1/RIPK3/MLKL signaling pathway,and eventually caused ovarian pathological injuries and necroptosis characteristics.The alterations of above indicators were most apparent in the joint group.Above all,this research illustrates that Mo and/or Cd exposure can initiate necroptosis through Th1/Th2 imbalance-modulated ER stress in duck ovaries,and Mo and Cd combined exposure aggravates ovarian injuries.This research explores the molecular mechanism of necroptosis caused by Mo and/or Cd,which reveals that ER stress attenuation may be a therapeutic target to alleviate necroptosis.
基金CAS Project for Young Scientists in Basic Research,Grant/Award Number:YSBR‐084China Postdoctoral Science Foundation,Grant/Award Number:2022M723353+4 种基金Jiangsu Funding Program for Excellent Postdoctoral TalentStrategic Priority Research Program(B)of the Chinese Academy of Sciences,Grant/Award Number:XDB33030200National Natural Science Foundation of China,Grant/Award Numbers:11974390,U22A20263,52250308,12347185National Key Basic Research Program of China,Grant/Award Numbers:2020YFA0309100,2019YFA0308500Postdoctoral Fellowship Program of CPSF,Grant/Award Number:GZC20230443。
文摘Oxide semimetals exhibiting both nontrivial topological characteristics stand as exemplary parent compounds and multiple degrees of freedom,offering a promise for the realization of novel electronic states.In this work,we report the structural and transport phase transition in an oxide semimetal,SrNbO_(3),achieved through effective anion doping.Notably,the resistivity increased by more than three orders of magnitude at room temperature upon nitrogendoping.The extent of electronic modulation in SrNbO_(3)is strongly correlated with misfit strain,underscoring its phase instability to both chemical doping and crystallographic symmetry variations.Using first-principles calculations,we discern that elevating the level of nitrogen doping induces an upward shift in the conductive bands of SrNbO_(3−δ)N_(δ).Consequently,a transition from a metallic state to an insulating state becomes apparent as the nitrogen concentration reaches a threshold of 1/3.This investigation shows effective anion engineering in oxide semimetals,offering pathways for manipulating their physical properties.
文摘Aims:Surveys and research on the applications of the hepatic venous pressure gradient(HVPG)are important for understanding the current status and future development of this technology in China.This article aimed to investigate the status of hepatic venous pressure gradient measurement in China in 2022.Methods:We investigated the overall status of HVPG technology in China-including hospital distribution,hospital level,annual number of cases,catheters used,average cost,indications,and current challenges by using online questionnaire.By counting the number and percentages of cases of these results,we hope to clarify the current status of HVPG measurements in China.Results:According to the survey,85 hospitals in China used HVPG technology in 2022 distributed across 29 provinces.A total of 4989 HVPG measurements were performed in all of the surveyed hospitals in 2022,of which 2813 cases(56.4%)were measured alone.The average cost of HVPG measurement was 5646.8±2327.9 CNY.Of the clinical teams who performed the measurements(sometimes multiple per hospital),94.3%(82/87)used the balloon method,and the majority of the teams(72.4%,63/87)used embolectomy catheters.Conclusions:This survey clarified the clinical application status of HVPG in China and confirmed that some medical institutions in China have established a foundation for this technology.It is still necessary to continue promoting and popularizing this technology in the future.
基金supported by pharmacy school of Chongqing Medical University.This research work was financially supported by Research Fund of Chongqing Science&Technology Commission(No:cstc2013jcyjA10040)Research Start-up Fund of Pharmacy School of Chongqing Medical University.
文摘Inflammation drives the development of depression and may affect neurotransmitters and thus neurocircuits increase the risk of depression.To investigate the influence of inhibition of inflammatory pathways on the biogenic amine neurotransmitters metabolism in depressive rats,sertraline,and meloxicam,the inhibitors of arachidonic acid-cyclooxygenase-2/lipoxygenase(AA-COX-2/5-LO)pathways,were given to depressive rats.After the development of depression model by chronic unpredictable mild stress(CUMS)for 6 weeks,Successful modeling rats were selected and randomly divided into CUMS group and medication administration group.After given medicine,The biogenic amine neurotransmitters in rat cortex and hippocampus were measured by high-performance liquid chromatography equipped with an electrochemical detector(HPLC-ECD).Compared with the normal group,the concentration of norepinephrine(NE)significantly decreased and the concentrations of Tyrosine(Tyr),Tryptophan(Trp),3,4-dihydroxyphenyl acetic acid(DOPAC),3-methoxy-4-hydroxyphenylglycol(MHPG),homovanillic acid(HVA)and 5-hydroxyindoleacetic acid(5-HIAA)significantly increased in the CUMS group.Sertraline significantly inhibited the elevation of 5-HIAA.Meloxicam inhibited the decrease of NE level in CUMS-induced rat and the increase of Trp,MHPG,and 5-HIAA level in a dose-dependent manner.Caffeic acid inhibited the decrease of NE and the increase of Trp and MHPG in a dose-dependent manner.The inhibition of AA-COX-2/5-LO pathways can improve the behaviors of depression rats and suppress CUMSinduced changes in biogenic amines.Compared with the single-dose lipoxygenase(5-LO)or Cyclooxygenase-2(COX-2)inhibitor,the combination treatment with meloxicam 1 mg/kg and caffeic acid 10 mg/kg have no significant improvement in CUMS-induced depression behavior and the level of cortical monoamine neurotransmitters and their metabolites.
基金The Research Fund of Chongqing Science&Technology Commission(Grant No.cstc2013jcyj A10040)Research Start-up Fund of Pharmacy School of Chongqing Medical University
文摘The main active components of Rhubarb are anthraquinones（AQs）, most of which are glycosides and others are free. The concentrations of AQs derivatives（rhein, aloe-emodin, emodin, chrysophanol and physcion） in plasma and homogenate were assayed with a high performance liquid chromatography（HPLC） method. The pharmacokinetic parameters and distribution of Rhubarb AQs in rabbits or rats were studied after administration of different formulas. Elimination of AQs was fit to a two-compartment model in rats and rabbits. There were no significant difference in the main pharmacokinetic parameters between rhein and AQs in rats. AQs were distributed progressively in the kidney, liver, blood, and heart. The AQs were mainly composed of rhein in vivo and was excreted by the kidney. For formulas that contained Rhubarb, rhein could be used as a probe for in vivo pharmacokinetic studies.
基金The authors appreciate the support from the National Natural Science Foundation of China(Grant No.22264025)the Yunnan Province Education Department Scientific Research Foundation Project(Grant No.2022J0136)the Applied Basic Research Foundation of Yunnan Province(Grant Nos.202201AS070020,202201AU070061).
文摘The zero-valent iron modified biochar materials are widely employed for heavy metals immobilization.However,these materials would be inevitably aged by natural forces after entering into the environment,while there are seldom studies reported the aging effects of zero-valent iron modified biochar.In this work,the hydrogen peroxide and hydrochloric acid solution were applied to simulate aging conditions of zero-valent iron modified biochar.According to the results,the adsorption capacity of copper(II)contaminants on biochar,zero-valent iron modified biochar-1,and zero-valent iron modified biochar-2 after aging was decreased by 15.36%,22.65%and 23.26%,respectively.The surface interactions were assigned with chemisorption occurred on multi-molecular layers,which were proved by the pseudo-second-order and Langmuir models.After aging,the decreasing of capacity could be mainly attributed to the inhibition of ion-exchange and zero-valent iron oxidation.Moreover,the plant growth and soil leaching experiments also proved the effects of aging treatment,the zero-valent iron modified biochar reduced the inhibition of copper(II)bioavailability and increased the mobility of copper(II)after aging.All these results bridged the gaps between bio-adsorbents customization and their environmental behaviors during practical agro-industrial application.
基金sponsored by the Natural Science Foundation of Henan(No.222300420100)the Foundation of Key Laboratory of National Defense Science and Technology,China(61421030107).
文摘At ToSC 2019,Ankele et al.proposed a novel idea for constructing zero-correlation linear distinguishers in a related-tweakey model.This paper further clarifies this principle and gives a search model for zero-correlation distin-guishers.As a result,for the first time,the authors construct 14-round and 16-round zero-correlation linear distinguishers for SKINNY-n-2n and SKINNY-n-3n,respectively,which are both two rounds longer than Anekele et al.'s.Based on these distinguishers,the paper presents related-tweakey zero-correlation linear attacks on 21-round SKINNY-n-2n and 25-round SKINNY-n-3n,respectively.
文摘Erratum to:Front.Comput.Sci.,2023,17(4):174808.DOI 10.1007/s11704-022-2206-2.The conditions of Proposition 3 in this paper are insufficient.The proposition is corrected as follows.Proposition 3 Given a pair of input plaintext and output masks(Γ_(0),Γ_(r))of the r-round block cipher SKINNY-n-pn,for any linear trail Γ of the linear approximation Γ_(0)→Γ_(r) and for the cell position i,if the number of nonzero elements in its Γ sequence is greater than 0 and less than p+1,then the cipher has a zero-correlation linear hull.
