Achieving Ultra-Broad Microwave Absorption Bandwidth Around Millimeter-Wave Atmospheric Window Through an Intentional Manipulation on Multi-Magnetic Resonance Behavior

The utilization of electromagnetic waves is rapidly advancing into the millimeter-wave frequency range,posing increasingly severe challenges in terms of electromagnetic pollution prevention and radar stealth.However,existing millimeter-wave absorbers are still inadequate in addressing these issues due to their monotonous magnetic resonance pattern.In this work,rare-earth La^(3+)and non-magnetic Zr^(4+)ions are simultaneously incorporated into M-type barium ferrite(BaM)to intentionally manipulate the multi-magnetic resonance behavior.By leveraging the contrary impact of La^(3+)and Zr^(4+)ions on magnetocrystalline anisotropy field,the restrictive relationship between intensity and frequency of the multi-magnetic resonance is successfully eliminated.The magnetic resonance peak-differentiating and imitating results confirm that significant multi-magnetic resonance phenomenon emerges around 35 GHz due to the reinforced exchange coupling effect between Fe^(3+)and Fe^(2+)ions.Additionally,Mosbauer spectra analysis,first-principle calculations,and least square fitting collectively identify that additional La^(3+)doping leads to a profound rearrangement of Zr^(4+)occupation and thus makes the portion of polarization/conduction loss increase gradually.As a consequence,the La^(3+)-Zr^(4+)co-doped BaM achieves an ultra-broad bandwidth of 12.5+GHz covering from 27.5 to 40+GHz,which holds remarkable potential for millimeter-wave absorbers around the atmospheric window of 35 GHz.

Kuicolong-yu enema decoction retains traditional Chinese medicine enema attenuates inflammatory response ulcerative colitis through TLR4/NF-κB signaling pathway

BACKGROUND Ulcer colitis(UC)is a chronic,nonspecific,and noninfectious inflammatory bowel disease.Recently,Toll-like receptors(TLRs)have been found to be closely associated with clinical inflammatory diseases.Achieving complete remission in patients with intermittent periods of activity followed by dormancy is challenging.Moreover,no study has explored the mechanism by which Kuicolong-yu enema decoction retains traditional Chinese medicine enemas to attenuate the inflammatory response in UC.AIM To explore the mechanism by which Kuicolong-yu enema decoction retains traditional Chinese medicine enemas to attenuate the inflammatory response in UC.METHODS This prospective clinical study included patients who met the exclusion criteria in 2020 and 2021.The patients with UC were divided into two groups(control and experimental).The peripheral blood of the experimental and control groups were collected under aseptic conditions.The expression of TLR4 protein,NF-κB,IL-6,and IL-17 was detected in the peripheral blood of patients in the experimental group and control group before and 1 month after taking the drug.Linear co rrelation analysis was used to analyze the relationship between the expression level of TLR4 protein and the expression levels of downstream signal NF-κB and inflammatory factors IL-6 and IL-17,and P<0.05 was considered statistically significant.RESULTS There were no significant differences in the patient characteristics between the control and experimental groups.The results showed that the expression levels of TLR4 and NF-κB in the experimental group were significantly lower than those in the control group(P<0.05).The levels of IL-6 and IL-17 in the experimental group were significantly lower than those in the control group(P<0.05).The TLR4 protein expression in the experimental group was positively correlated with the expression level of downstream signal NF-κB and was positively correlated with the levels of downstream inflammatory cytokines IL-6 and IL-17(r=0.823,P<0.05).CONCLUSION Kuicolong-yu enema decoction retains traditional Chinese medicine enema attenuates the inflammatory response of UC through the TLR4/NF-κB signaling pathway.

A systematic review of the efficacy of traditional Chinese medicine retention enema in the treatment of ulcerative colitis

The objective of this study is to summarize the efficacy and safety of traditional Chinese medicine(TCM)enema in the treatment of ulcerative colitis(UC).The randomized controlled trials on TCM enema intervention in the treatment of UC were searched in seven databases:PubMed,Embase,Web of Science,CBM,CNKI,Wanfang Database,and VIP Database from January 1,2013 to June 6,2022,and the data were analyzed using RevMan 5.3 software.A total of 18 studies involving 1514 UC patients were included.Meta analysis results showed that compared with conventional Western medicine,Chinese medicine enema had a significant effect on UC,and the clinical effective rate of the experimental group using Chinese medicine enema was 4.45 times that of the control group using conventional Western medicine(odds ratio=4.45,95%confidence interval[3.27,6.06]).Therefore,Chinese medicine enema is effective in the treatment of UC,and can significantly reduce related symptoms.

The Value of Ultrasound in the Application of Water Enema in Intussusception

Objective:To introduce high-frequency ultrasound diagnostic technology to cooperate with diagnosis and treatment for patients with intussusception,and to observe its clinical application effect.Methods:The study took patients with intussusception as the object of observation,with a total of 52 cases participating,all of which were clinically admitted from December 2022 to December 2023.After enrollment,the patients underwent high-frequency ultrasound detection in sequence,recording the ultrasound imaging characteristics,and referring to the results of surgical or leaky saline enema reset to confirm the diagnosis(the gold standard)to assess the diagnostic efficacy of high-frequency ultrasound technology.Results:Comparing the confirmed diagnostic results of surgery or leaking saline enema restoration,the detection rate of high-frequency ultrasound technology was 98.07%(P>0.05).Among the 52 patients treated with hydropneumatic enema restoration with the cooperation of high-frequency ultrasound monitoring,39 patients were successfully reset in the first treatment(75.00%),while 9 patients were successfully reset(17.30%)after multiple treatments(≥2 times);the remaining 4 patients were unsuccessful and then converted to surgical treatment,and all of them were successfully treated and cured.Conclusion:For the diagnosis of intussusception,high-frequency color Doppler ultrasound has the advantages of high accuracy and simple operation,which provides a scientific and accurate reference basis for the clinical diagnosis and treatment of patients.

Study of Quality Standards of Xiao’er Qingre Enema Preparation in Hospitals

Objective:To establish the quality standards for the preparation of Xiao’er Qingre enema in hospitals.Method:Thin-layer chromatography(TLC)was used to identify Radix Isatidis and Glycyrrhizae in the prescription.The content of(R,S)-Goitrin was determined by high-performance liquid chromatography(HPLC).Results:In TLC identification,there was no interference between the negative controls of Radix Isatidis and glycyrrhizae,and the spots were well-separated.The HPLC results of(R,S)-Goitrin showed a good linear relationship between the peak area and concentration within the range of 0.476-95.2μg·mL-1(r=0.9999).Conclusion:The TLC and HPLC methods established in this experiment are simple,reproducible,and specific,making them suitable for the quality control Xiao’er Qingre enema preparation in hospitals.

Magnetic and microwave absorbing properties of M-type barium ferrite/graphene oxide composite microwave absorber

In order to improve the absorbing properties of M- type barium ferrite absorbing materials, M-type barium ferrite/graphene oxide composites with different graphene oxide contents were synthesized by the sol-gel autocombustion method. X-ray diffraction （XRD）, a scanning electronic microscopy （ SEM ）, a physical properties measurement system （PPMS-9）, and a vector network analyzer were used to analyze their structure, surface morphology, magnetic and absorbing properties, respectively. The results show that the absorbing band of the composite absorbing material is widened and the absorbing strength is increased compared with the pure M-type barium ferrite. The sample with the content of doped graphene oxide of 3% has the minimum reflectivity at 10 to 18 GHz frequencies. Hence, the doped graphene oxide effectively improves the absorbing properties of M-type barium ferrite.

Pattern and distribution of colonic diverticulosis:Analysis of 2877 barium enemas in Thailand

AIM:To determine the pattern and distribution of colonic diverticulosis in Thai adults.METHODS:A review of the computerized radiology database for double contrast barium enema(DCBE)in Thai adults was performed at the Faculty of Medicine Siriraj Hospital,Mahidol University,Bangkok,Thailand.Incomplete studies and DCBE examinations performed in non-Thai individuals were excluded.The pattern and distribution of colonic diverticulosis detected during DCBE studies from June 2009 to October 2011 were determined.The occurrence of solitary cecal diverticulum,rectal diverticulum and giant diverticulum were reported.Factors influencing the presence of colonic diverticulosis were evaluated.RESULTS:A total of 2877 suitable DCBE examinations were retrospectively reviewed.The mean age of patients was 59.8±14.7 years.Of these patients,1778(61.8%)were female and 700(24.3%)were asymptomatic.Colonic diverticulosis was identified in 820patients(28.5%).Right-sided diverticulosis(641 cases;22.3%)was more frequently reported than left-sided diverticulosis(383 cases;13.3%).Pancolonic diverticulosis was found in 98 cases(3.4%).The occurrence of solitary cecal diverticulum,rectal diverticulum and giant diverticulum were 1.5%(42 cases),0.4%(12 cases),and 0.03%(1 case),respectively.There was no significant difference in the overall occurrence of colonic diverticulosis between male and female patients(28.3%vs 28.6%,P=0.85).DCBE examinations performed in patients with some gastrointestinal symptoms revealed the frequent occurrence of colonic diverticulosis compared with those performed in asymptomatic individuals(29.5%vs 25.3%,P=0.03).Change in bowel habit was strongly associated with the presence of diverticulosis(a relative risk of 1.39;P=0.005).The presence of diverticulosis was not correlated with age in symptomatic patients or asymptomatic individuals(P>0.05).CONCLUSION:Colonic diverticulosis was identified in28.5%of DCBE examinations in Thai adults.There was no association between the presence of diverticulosis and gender or age.

Therapeutic barium enema for bleeding colonic diverticula:Four case series and review of the literature

The prevalence of diverticular diseases of the colon, including severe and persistent bleeding in Eastern countries, has increased in the last decades. The bleeding from colonic diverticula is the most common cause of acute lower gastrointestinal bleeding. Herein, we report four cases of severe and persistent bleeding of colonic diverticular disease that could be treated with a high concentration barium enema. These four cases showed a similar pattern of bleeding whose source could not be identified. Colonoscopy revealed fresh blood in the entire colon and many diverticula were noted throughout the colon. No active bleeding source was identified, but large adherent clots in some diverticula were noted. After endoscopic and angiographic therapies failed, therapeutic barium enema stopped the severe bleeding. These patients remained free of re-bleeding in the follow-up period (range 17-35 mo) after the therapy. We report the four case series of therapeutic barium enema and reviewed the literature pertinent to this procedure.

Effectiveness of therapeutic barium enema for diverticular hemorrhage

AIM:To evaluate the effectiveness of barium impaction therapy for patients with colonic diverticular bleeding.METHODS:We reviewed the clinical charts of patients in whom therapeutic barium enema was performed for the control of diverticular bleeding between August2010 and March 2012 at Yokohama Rosai Hospital.Twenty patients were included in the review,consisting of 14 men and 6 women.The median age of the patients was 73.5 years.The duration of the followup period ranged from 1 to 19 mo(median:9.8 mo).Among the 20 patients were 11 patients who required the procedure for re-bleeding during hospitalization,6patients who required it for re-bleeding that developed after the patient left the hospital,and 3 patients who required the procedure for the prevention of rebleeding.Barium(concentration:150 w%/v%)was administered per the rectum,and the leading edge of the contrast medium was followed up to the cecum by fluoroscopy.After confirmation that the ascending colon and cecum were filled with barium,the enema tube was withdrawn,and the patient’s position was changed every 20 min for 3 h.RESULTS:Twelve patients remained free of rebleeding during the follow-up period(range:1-19mo)after the therapeutic barium enema,including 9men and 3 women with a median age of 72.0 years.Re-bleeding occurred in 8 patients including 5 men and 3 women with a median age of 68.5 years:4developed early re-bleeding,defined as re-bleeding that occurs within one week after the procedure,and the remaining 4 developed late re-bleeding.The DFI(disease-free interval)decreased 0.4 for 12 mo.Only one patient developed a complication from therapeutic barium enema(colonic perforation).CONCLUSION:Therapeutic barium enema is effective for the control of diverticular hemorrhage in cases where the active bleeding site cannot be identified by colonoscopy.

Colonoscopy can miss diverticula of the left colon identified by barium enema

AIM: To identify the diagnostic value of colonoscopy for diverticulosis as determined by barium enema. METHODS: A total of 65 patients with hematochezia who underwent colonoscopy and barium enema were analyzed, and the diagnostic value of colonoscopy for diverticula was assessed. The receiver operating characteristic area under the curve was compared in relation to age (< 70 or ≥ 70 years), sex, and colon location. The number of diverticula was counted, and the detection ratio was calculated. RESULTS: Colonic diverticula were observed in 46 patients with barium enema. Colonoscopy had a sensitivity of 91% and specificity of 90%. No significant differences were found in the receiver operating characteristic area under the curve (ROC-AUC) for age group or sex. The ROC-AUC of the left colon was significantly lower than that of the right colon (0.81 vs 0.96, P=0.02). Colonoscopy identified 486 colonic diverticula, while barium enema identified 1186. The detection ratio for the entire colon was therefore 0.41 (486/1186). The detection ratio in the left colon (0.32, 189/588) was significantly lower than that of the right colon (0.50, 297/598) (P < 0.01). CONCLUSION: Compared with barium enema, only half the number of colonic diverticula can be detected by colonoscopy in the entire colon and even less in the left colon.

Steam reforming of acetic acid over Ni-Ba/Al2O3 catalysts:Impacts of barium addition on coking behaviors and formation of reaction intermediates

The influence of barium addition to a Ni/Al2O3 catalyst on the reaction intermediates formed,the activity,resistance of the catalyst to coking,and properties of the coke formed after acetic acid steam reforming were investigated in this study.The results showed the drastic effects of barium addition on the physicochemical properties and performances of the catalyst.The solid-phase reaction between alumina and BaO formed BaAl2O4,which re-constructed the alumina structure,resulting in a decrease in the specific surface area and an increase in the resistance of metallic Ni to sintering.The addition of barium was also beneficial for enhancing the catalytic activity,resulting from the changed catalytic reaction network.The in-situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) study of the acetic acid steam reforming indicated that barium could effectively suppress the accumulation of the reaction intermediates of carbonyl,formate,and C=C functional groups on the catalyst surface,attributed to its relatively high ability to cause the gasification of these species.In addition,coking was considerably more significant over the Ba-Ni/Al2O3 catalyst.Moreover,the Ba-Ni/Al2O3 catalyst was more stable than the Ni/Al2O3catalyst,owing to the distinct forms of coke formed (carbon nanotube form over the Ba-Ni/Al2O3 catalyst,and the amorphous form over the Ni/Al2O3 catalyst).

Deoxidation Behavior of Alloys Bearing Barium in Molten Steel

The deoxidation behaviors of alloys bearing barium in pipe steel were researched with MgO crucible under argon atmosphere in MoSi2 furnace at 1 873 K.The total oxygen contents of molten steel,the distribution,size and morphology of deoxidation products in the steel were surveyed.The metamorphic mechanism for deoxidation products of alloy bearing barium was also discussed.The results show that applying alloy bearing barium to the pipe steel,very low total oxygen contents can be obtained,and deoxidation products,which easily float up from molten steel,can be changed into globular shape and uniformly distributed in steel.The equilibrium time of total oxygen is about 25 min,and the terminal total oxygen contents range from 0.002 0%to 0.002 2% after treating with SiCa wire.The best deoxidizers are SiAlBaCa and SiAlBaCaSr.

Dopant Behaviours of Sm_2O_3 on Microstructure and Properties of Barium Zirconium Titanate Ceramics

The effect of Sm 2O 3 dopant on the sintering characteristics and dielectric properties of barium zirconium titanate ceramics (BaZr x Ti 1- x O 3) was investigated. It is shown that trace amount of Sm 2O 3 can greatly affect the grain growth and densification of barium zirconium titanate ceramics during sintering. At the same time, the dielectric peak at high temperature shifts to lower temperature and that at low temperature shifts to higher temperature. The two dielectric peaks overlap with each other when the Sm 2O 3 dopant content varies from 0 25% to 1%, and the maximum relative dielectric constant is greatly enhanced. These effects may be attributed to the substitution actions of the rare earth element in perovskite lattice. At the doping content of 0 75%, the dielectric constant maximum of 23570 can be obtained. By adopting some proper additives, an excellent Y5V dielective material is obtained, and the room temperature properties are as follows: relative dielectric constant ε RT ≥23,000, dielectric loss tgδ≤0 0075 and the breakdown strength under alternating field E b≥5 kV·mm -1 .

Synthesis of Nano-sized Barium Titanate Powder by Solid-state Reaction between Barium Carbonate and Titania

Size control of BaTiO3 in solid-state reaction between BaCO3 and TiO2 was demonstrated by varying the size of TiO2 and milling conditions of BaCO3. The smaller TiO2 particles had higher surface area, resulting in faster initial reaction. The mechanically milled BaCO3 particles accelerated the diffusion process and decreased the calcinations temperature. It can be deduced from the results that the size control is possible and nano-sized BaTiO3 particles with about 60 nm can be synthesized by using the conventional solid-state reaction between BaCO3 and TiO2.

Layered barium vanadate nanobelts for high-performance aqueous zinc-ion batteries

Aqueous zinc-ion batteries(ZIBs)are deemed as the idea option for large-scale energy storage systems owing to many alluring merits including low manufacture cost,environmental friendliness,and high operations safety.However,to develop high-performance cathode is still significant for practical application of ZIBs.Herein,Ba_(0.23)V_(2)O_(5)·1.1H_(2)O(BaVO)nanobelts were fabricated as cathode materials of ZIBs by a typical hydrothermal synthesis method.Benefiting from the increased interlayer distance of 1.31 nm by Ba2+ and H2O pre-intercalated,the obtained BaVO nanobelts showed an excellent initial discharge capacity of 378 mAh·g^(-1) at 0.1 A·g^(-1),a great rate performance(e.g.,172 mAh·g^(-1) at 5 A·g^(-1)),and a superior capacity retention(93% after 2000 cycles at 5 A·g^(-1)).

Research progress in the treatment of diabetic kidney disease with Chinese medicine enema

Chinese medicine enema is an effective guiding method to treat diabetic kidney disease,a common chronic complication of diabetes,by regulating the function of the intestines to increase clearing and lower turbidity.We reviewed the treatment of diabetic kidney disease(DKD)with traditional Chinese medicine enemas and found that commonly used traditional Chinese medicines included Rhei Radix Et Rhizoma(Rheum palmatum L.),Ostrea concha(Ostrea gigas Thunberg),Taraxaci Herba(Taraxacum mongolicum Hand.-Mazz.),Astmgali Radix(Astragalus membranaceus Bge.var.mongholicus(Bge.)Hsiao),Salviae Miltiorrhizae Radix Et Rhizoma(Salvia miltiorrhiza Bge.),and Aconiti Lateralis Radix Praeparata(Aconitum carmichaelii Debx).The mechanism of the adjuvant therapeutic effect on DKD may relate to regulating intestinal flora,inhibiting inflammation and oxidative stress and protecting against kidney injury.

Dielectric properties and point defect behavior of antimony oxide doped Ti deficient barium strontium titanate ceramics

The microstructures and dielectric properties of Sb2O3-doped Ti deficient barium strontium titanate ceramics prepared by solid state method were investigated with non-stoichiometric level and Sb2O3content by SEM,XRD and LCR measure system.It is found that with the increase ofδ,(Ba0.75Sr0.25)Ti1-δO3-2δceramics transform from single phase solid solutions with typical cubic perovskite structure to multiphase compounds while(Ba0.75Sr0.25)Ti0.998O2.996ceramics remain to be single-phase with the increasing Sb2O3content.The distortion of the ABO3perovskite lattice caused by VTi″″and VO..induces the drop of Curie temperature and the rise of relative dielectric constant in(Ba0.75Sr0.25)Ti1-δO3-2δceramics with increasingδvalue.The orientation of VO??elastic dipoles results in the domain-wall pinning and thus the reduction of the dielectric loss.With increasing Sb2O3content,the relative dielectric constant,dielectric constant maximum and Curie temperature of(Ba0.75Sr0.25)Ti0.998O2.996ceramics decrease dramatically while the dielectric loss increases.

Preparation and Characterization of M-Type Barium Ferrite Fibers via Aqueous Sol-Gel Process

BaFe12O19 fibers was prepared via an aqueous sol-gel process using Fe（OH）（HCOO）2 synthesized in laboratory and Ba（CH3COO）2 as the original materials and citrate as the chelate. The rheological behaviour of spinnable sol was characterized on rheometer, and the development of gel fibers to barium ferrite fibers was studied by IR, TG and XRD. Morphology observation of the fibers was given on SEM, and the diameter of the obtained fibers was between 5 and 10 um corresponding to different additives. The additives affected the surface tension of the precursor sol which had close relation to the microstructure of fibers. Sucrose and hydroxyethylic cellulose could improve the surface tension while diethanolamine and hexadecylamine reduce that of the decylamine as an additive, well-structured BaFe12O19 precursor sol. And using diethanolamine or hexafibers could be obtained.

A New 2D Barium-organic Framework Built from 1H-Benzimidazole-5,6-dicarboxylate with Luminescent and Antibacterial Studies

A new 2D barium-organic framework, [Ba2（Hbidc）2]n （1, Hbidc = 1H-benzimida- zole-5,6-dicarboxylate）, has been solvothermally synthesized and structurally characterized by elemental analysis, IR spectroscopy, TGA, powder X-ray diffraction, and single-crystal X-ray diffraction. The crystal belongs to the triclinic system, space group Pī with α= 6.8785（14）, b = 9.4558（19）, c = 14.641（3） A, α = 86.22（3）, β = 82.27（3）, γ = 88.40（3）°, V = 941.4（3） A^3, Z = 2, Mr = 682.96, Dc = 2.409 g/cm^3, μ（MoKα） = 4.217 mm^-1, F（000） = 640, the final R = 0.0587 and wR = 0.1619 for 3030 observed reflections with I 〉 2σ（I）. Structural determination reveals that 1 exhibits an interesting 2D layer structure constructed by carboxylate groups of Hbidc ligands and shows good thermal stability （up to 400 ℃）. Solid-state 1 emits intense indigotin photoluminescence with fluorescence lifetime of 62.13 （408 nm） at room temperature. The H3bidc ligand and its barium complex have been screened for antibacterial activity against several bacteria strains, and the results are compared with the activity of penicillin.

Scaled-energy spectroscopy of a |M| = 1 Rydberg barium atom in an electric field

We observe strong energy-dependent quantum defects in the scaled-energy Stark spectra for ｜M｜ =1 Rydberg states of barium atoms at three scaled energies：ε=-2.000, ε=-2.500 and ε=-3.000. In an attempt to explain the observations, theoretical calculations of closed orbit theory based on a model potential including core effect are performed for non-hydrogenic atoms. While such a potential has been uniformly successful for alkali atoms with a single valence electron, it fails to match experimental results for barium atoms in the 6snp Rydberg states with two valence electrons. Our study points out that this discrepancy is due to the strong perturbation from the 5d8p state, which voids the simple approximation for constant quantum defects of principle quantum number n.