The fluctuation of the vapor cell temperature leads to the variations of the density of the alkali metal atoms,which seriously damages the long-term stability of the spin-exchange relaxation-free(SERF)*** address this...
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The fluctuation of the vapor cell temperature leads to the variations of the density of the alkali metal atoms,which seriously damages the long-term stability of the spin-exchange relaxation-free(SERF)*** address this problem,we propose a novel method for suppressing the cell temperature error by manipulating the probe laser frequency.A temperature coefficient model of the SERF comagnetometer is established based on the steady-state response,which indicates that the comagnetometer can be tuned to a working point where the output signal is insensitive to the cell temperature fluctuation,and the working point is determined by the relaxation rate of the alkali metal *** method is verified in a K-Rb-^(21)Ne comagnetometer,and the experimental results are consistent with the *** theory and method presented here lay a foundation for the practical applications of the SERF comagnetometer.
Two-year field experiments were conducted at linqing, Yellow River valley of China, to study the plant response to the removal of early fruiting branches in transgenic Bt （Bacillus thuringiensis） cotton （Gossypium ...
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Two-year field experiments were conducted at linqing, Yellow River valley of China, to study the plant response to the removal of early fruiting branches in transgenic Bt （Bacillus thuringiensis） cotton （Gossypium hirsutum L.） from 2003 to 2004. Plants were undamaged and treated by removing two basal fruiting branches （FB） at squaring to form the control and the removal treatment, respectively. The plant height, leaf area （LA）, dry weight of fruiting forms （DWFF）, the number of fruiting nodes （NFN）, photosynthetic （Pn） rate, and levels of leaf chlorophyll （Chl）, N, P, K, and Cry lAc protein in main- stem leaves were measured at a 10- or 20-d interval after FB removal, and the sink/source ratio as indicated by NFN/LA and DWFF/LA was determined. FB removal significantly increased the plant height, LA, and plant biomass in both years. lint yields were increased 7.5 and 5.2% by removal compared with their controls in 2003 and 2004, respectively. Significant increases in boll size （5.7 and 5.1%） were also observed in removal than in control for both years. Either NFN/LA or DWFF/LA was significantly reduced by removal before 40 d after removal; however, both NFN/LA and DWFF/LA were significantly enhanced by FB removal at 80 d after removal compared to the untreated control. There was no significant difference in fiber quality in the first two harvests between removal and control, but fiber strength and micronarie in the third harvest were significantly improved by FB removal. In terms of leaf Chl, Pn rate, levels of total N, P, and K in late season, leaf senescence was considerably delayed by FB removal. Levels of CrylAc protein in the fully expanded young leaves were considerably higher in FB-excised plants than in control, indicating FB removal enhanced CrylAc expression. It is suggested that the yield and quality improvement with FB removal may be attributed to the increased NFN/LA or DWFF/LA in late season and delayed leaf senescence, respectively. FB removal can be a
A new titanium-silicate material was synthesized with cubic cage-like tetramethylammonium octasilicate and TiCl4 ethanol solution as precursors. The product was characterized by FTIR, ^29Si NMR, UV-Vis, and XRD. Struc...
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A new titanium-silicate material was synthesized with cubic cage-like tetramethylammonium octasilicate and TiCl4 ethanol solution as precursors. The product was characterized by FTIR, ^29Si NMR, UV-Vis, and XRD. Struc-tural and ingrediental analyses suggest that this material has a layered structure with cubic cage-like polyhedral oligo-silsesquioxane as building blocks and titanium as bridging atoms.
A field investigation was conducted at the Shenyang Experimental Station of Ecology, Chinese Academy of Sciences, in an aquic brown soil of Northeast China under three land use types (cropland, abandoned cropland, and...
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A field investigation was conducted at the Shenyang Experimental Station of Ecology, Chinese Academy of Sciences, in an aquic brown soil of Northeast China under three land use types (cropland, abandoned cropland, and woodland) in order to evaluate whether the vertical distribution and seasonal fluctuation for the number of total nematodes and trophic groups could reflect soil ecosystem differences and to determine the relationships between soil chemical properties and soil nematodes. The majority of soil nematodes were present in the 0-20 cm soil layers, and for these land use types plant parasites were the most abundant trophic group. In the abandoned cropland the numbers of plant parasites reached a peak on the August sampling date, whereas the cropland and woodland peaked on the October sampling date. Meanwhile, in all land use types the number of total nematodes, bacterivores, plant parasites, and omnivores-predators was negatively (P < 0.05, except for bacterivores in cropland, which was not significant) correlated with bulk density, and positively (P < 0.05, except for fungivores in abandoned cropland, which was not significant) correlated with total organic carbon and total nitrogen.
Glioblastoma multiforme （GBM） is the most common primary malignant brain tumor in adults, which accounts for approximately 50% of all gliomas. Its prognosis is particularly disappointing with a median life expectanc...
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Glioblastoma multiforme （GBM） is the most common primary malignant brain tumor in adults, which accounts for approximately 50% of all gliomas. Its prognosis is particularly disappointing with a median life expectancy less than a year even when the patients are treated with the most aggressive regimens. Over the past 10 years, a number of trials have tried to establish whether adjuvant chemotherapy, as well as molecularly targeted therapy, provides GBM patients with clinically meaningful benefits.
Objective To study the effect of vasocation intestinal peptide （VIP） on immune privilege of the rat testis. Methods The UU infected SD rats and Leydig cells were intervened by VIP, the secretion of TGF-β and the ex...
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Objective To study the effect of vasocation intestinal peptide （VIP） on immune privilege of the rat testis. Methods The UU infected SD rats and Leydig cells were intervened by VIP, the secretion of TGF-β and the expression of FasL in rat Leydig cells were compared between VIP-intervened group and control group to test the effect of VIP on immune privilege of the rat testis in vitro and in vivo. Results In vitro, the secretion of TGF-β in Leydig cells could be increased by low dosage of VIP while inhibitited by high dosage of VIP; expression of FasL mRNA in Leydig cells could be decreased by VIP In vivo, increased expression of TGF-β mRNA and decreased FasL mRNA were observed in VIP group in 2-3 weeks after infected by UU. In addition, the apoptosis of Jurkat cells mediated by Leydig cells could be prevented by VIP Conclusion When Leydig cells or testis infected by UU, VIP could regulate the immune function of rat Leydig cells and participate in the regulation of immune privilege of testis through the regulation of TGF-β secretion and FasL expression pattern of Leydig cells.
Blue and green organic fight-emitting devices with a structure of indium tin oxide （ITO）/N,N＇-bis-（1-naphthyl）-N,N＇- diphenyl- 1, l＇-biphenyl-4,4＇-diamine （NPB）/aluminum（HI） bis（2-methyl-8-quinolinato）4 ...
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Blue and green organic fight-emitting devices with a structure of indium tin oxide （ITO）/N,N＇-bis-（1-naphthyl）-N,N＇- diphenyl- 1, l＇-biphenyl-4,4＇-diamine （NPB）/aluminum（HI） bis（2-methyl-8-quinolinato）4 -phenylphenolato （BAlq）/tris（8- hydroxyquinolate）-aluminum （Alq3）/Mg：Ag have been fabricated. Blue to green light emission has been achieved with the change of organic film thickness. Based on energy band diagram and charge carrier tunneling theory, it is concluded that the films of different thicknesses play a role as a color-tuning layer and the color-variable electroluminescence （EL） is ascribed to the modulation function within the charge carrier recombination zone. In the case of heterostructure devices with high performance, the observed EL spectra varies significantly with the thickness of organic films, which is resulted from the shift of recombination region site. It has not been hitherto indicated that the devices compose of identical components could be implemented to realize different color emission by changing the film thickness of functional layers.
The high-temperature β-phase NaMnO2 is a promising material for Na-ion batteries（NIBs） due to its high capacity and abundant resources. However, the synthesis of phase-pure -NaMnO2 is burdensome and costineffective...
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The high-temperature β-phase NaMnO2 is a promising material for Na-ion batteries（NIBs） due to its high capacity and abundant resources. However, the synthesis of phase-pure -NaMnO2 is burdensome and costineffective because it needs to be sintered under oxygen atmosphere at high temperature and followed by a quenching procedure. Here we first report that the pure β phase can be stabilized by Cu-doping and easily synthesized by replacing a proportion of Mn with Cu via a simplified process including sintering in air and cooling to room temperature naturally. Based on the first-principle calculations, the band gap decreases from 0.7 eV to 0.3 eV, which indicates that the electronic conductivity can be improved by Cu-doping. The designed -NaCu（0.1）Mn（0.9）O2 is applied as cathode in NIBs, exhibiting an energy density of 419 Wh/kg and better performance in terms of rate capability and cycling stability than those in the undoped case.
Objective To evaluate the efficacy and safety of Chinese medicine(CM)Zihua Wenfei Zhisou Granule(ZWZG)in postinfectious cough(PIC)patients with CM syndrome of wind-cold invading Fei(Lung,WCIF).Methods This is a multic...
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Objective To evaluate the efficacy and safety of Chinese medicine(CM)Zihua Wenfei Zhisou Granule(ZWZG)in postinfectious cough(PIC)patients with CM syndrome of wind-cold invading Fei(Lung,WCIF).Methods This is a multicenter,randomized,double-blind,parallel-group,placebo-controlled phase II clinical *** patients with WCIF syndrome were recruited from the Respiratory Departments in 6 hospitals across China between March 2019 and December *** patients were randomly assigned to group A(ZWZG-matched placebo 15 g),group B(active ZWZG 15 g),and group C(active ZWZG 10 g plus ZWZG-matched placebo 5 g)in a 1:1:1 *** medications were taken orally 3 times daily for 14 consecutive *** primary outcomes were cough relief rate and cough disappearance *** secondary outcomes included time to cough relief,time to cough disappearance,and changes in cough symptom score(CSS),cough Visual Analog Scale(VAS)value,Cough-Specific Quality of life Questionnaire(CQLQ)score,and CM syndrome score from baseline(day 0)to post-treatment(day 14).Adverse events(AEs)in each group were *** A total of 198 patients were included in the full analysis set(FAS)and safety analysis set(SS),while 183 were enrolled in the per-protocol analysis set(PPS).In the FAS population,the cough relief rate was 47.76%,90.77%and 84.85%in groups A,B,and C,respectively;while the cough disappearance rate was 31.34%,72.31%and 68.18%,*** cough relief rates and cough disappearance rates in groups B and C were significantly higher than group A(Plief and cough disappearance in groups B and C were shorter than group A(Pline to post-treatment in CSS during daytime and nighttime as well as VAS(Pline to post-treatment in CQLQ and CM syndrome scores among 3 groups(P>0.05).Results in
Explorations into new electrolytes have highlighted the critical impact of solvation structure on battery performance,Classical molecular dynamics(CMD) using semi-empirical force fields has become an essential tool fo...
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Explorations into new electrolytes have highlighted the critical impact of solvation structure on battery performance,Classical molecular dynamics(CMD) using semi-empirical force fields has become an essential tool for simulating solvation ***,mainstream force fields often lack accuracy in describing strong ion-solvent interactions,causing disparities between CMD simulations and experimental *** some empirical methods have been employed in some of the studies to address this issue,their effectiveness has been *** CMD research,supported by quantum chemical calculations and experimental data,reveals that the solvation structure is influenced not only by the charge model but also by the polarization *** empirical approaches that focused solely on adjusting ion-solvent interaction strengths overlooked the importance of polarization *** on this insight,we propose integrating the Drude polarization model into mainstream force fields and verify its feasibility in carbonate,ether,and nitrile *** experimental results demonstrate that this approach significantly enhances the accuracy of CMD-simulated solvation *** work is expected to provide a more reliable CMD method for electrolyte design,shielding researchers from the pitfalls of erroneous simulation outcomes.
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