We propose and numerically demonstrate a method for selecting the electrons with specific transverse momentum at the exit of tunneling. The strategy is based on the manipulation of the consequent acceleration and recollision by adding a circularly polarized control field (CPCF) to an intense laser field. The CPCF offers a gate which only allows electrons with specific initial momentum to recollide with the parent ion. The scheme is illustrated by the example of tricircular laser fields. To intuitively reveal the mechanism of the gate, the Hamiltionian of the system and the electron dynamics are discussed in a rotating frame, where the CPCF becomes a static electric field and an additional Coriolis term emerges due to the choice of the noninertial frame. This momentum gate offers a powerful tool to study the nature of the tunnel electron wave packet.
Attribute reduction is one of the vital research contents of Rough Sets. A method of calculating positive region based on the trie tree has been proposed in the paper. And the time complexity is O (∣ C ∥ U ∣). A complete attribute reduction algorithm has been designed according to the method of calculating positive region. The experiment results show that the reduction algorithm is effective, and it is applicable to the reduction of mass data.
Abstract C 14 H 22 N 2 O 17 I 2 Co 2 , monoclinic, P 2 1 / c (no. 14), a = 7.13476(14) Å, b = 11.1853(2) Å, c = 32.5727(5) Å, β = 93.5815(16)°, Z = 4, V = 2594.38(8) Å 3 , R gt ( F ) = 0.0447, wR ref ( F 2 ) = 0.0865, T = 293.0 K.
Circular RNAs (circRNAs) is a novel class of non-coding RNAs that regulate gene expression during cancer progression. Circ_0092314 is a newly discovered circRNA that was upregulated in pancreatic cancer (PAAD) tissues. However, the detailed functions and underlying mechanisms of circ_0092314 in PAAD cells remain unclear.We first determined the expression of circ_0092314 in PAAD and normal tissues and further investigated the functional roles of circ_0092314 in regulating epithelial-mesenchymal transition (EMT) of PAAD cells. We also assessed the regulatory action of circ_0092314 on the microRNA-671 (miR-671) and its target S100P.Circ_0092314 was markedly upregulated in PAAD tissues and cells, and its overexpression was closely correlated with worse prognosis of PAAD patients. Functionally, circ_0092314 promotes proliferation, invasion and EMT in vitro and tumor growth in vivo. Mechanistically, we demonstrated that circ_0092314 directly binds to miR-671 and relieve its suppression of the downstream target S100P, which induces EMT and activates the AKT signaling pathway. The tumor-promoting effects caused by overexpression of circ_0092314 could be revered by re-expression of miR-671 in PAAD cells.Overall, our study demonstrates that circ_0092314 exerts critical roles in promoting the EMT features of PAAD cells, and provides insight into how elevated expression of circ_0092314 might influence PAAD progression.
The wavelength scaling of the cutoff energy in solid high harmonic generation (HHG) is investigated theoretically by separating the contributions into the intraband and interband components. We find that, the cutoff energies of intraband and interband HHG exhibit the essentially different wavelength dependences. Specifically, the cutoff energy of the intraband HHG is wavelength independent, whereas the cutoff energy of the interband HHG depends linearly on the laser wavelength. Our results can uniformly interpret two current different wavelength scalings of the cutoff energy reported in previous researches. The fundamentally different wavelength scalings of the cutoff energy for intraband and interband HHG can be used to distinguish the two mechanisms.
Objective
To study the prognostic value of procalcitonin (PCT) level in the outcome of patients with paraquat poisoning (PQ) .
Methods
The clinical data of 128 patients with acute PQ admitted to emergency department were collected from March 2013 through March 2014. The patients were divided into two groups: the death group and the survival group (survival of 28 days). Poisoning doses, urine concentration of PQ, time elapsed from poisoning to admission, and time elapsed from poisoning to gastrolavage were documented. And on the 1st day, the 3rd day and the 7th day after poisoning, serum PCT were detected. The level of PCT was used to investigate the prognostic values in patients with acute PQ in the death group and survival group.
Results
Of 128 cases, 72 (56.3%) survived and 56 died in 28 days. Among them, the level of PCT increased to some extent in the first day in 90 cases, and 48 patients died. According to trend analysis, the levels of PCT in death group on the 1st day , the 3rd day and the 7th day after PQ were significantly higher than those in survival group [1d: (0.96±0.13) vs. (0.08±0.01), 3d: (1.12±0.14) vs. (0.28±0.05), 7d: (1.22±0.14) vs. (0.20±0.03), P<0.01]. There was a trend of escalating PCT levels in death group, whereas the PCT level reached the peak on the 3st day and decreased gradually in the following days in survival group. The early PCT level was obviously related to poisoning doses, urine concentration, CRP, WBC, ALT, CR (the coefficient of association were 0.794, 0.723, 0.724, 0.332, 0.700, 0.414, respectively, P<0.01).
Conclusions
The serum level of PCT increased in patients with acute PQ was significantly positively correlated with the oral dose and urine concentration of paraquat, and it can be used as an indicator for PQ severity. There is important clinical significance in detecting the change of serum level of PCT for estimating the condition of patients and evaluating the prognosis.
Key words:
Paraquat; Procalcitonin; CRP; Urine concentration of paraquat; SIRS; MODS; Prognosis
The feasibility of using microwaves to quickly stimulate automatic color change in 3D-printed food containing curcumin or anthocyanins was studied. Firstly, with a dual-nozzle 3D printer, stacked structures included mashed potatoes (MPs, upper part, containing anthocyanins) and lemon juice-starch gel (LJSG, lower part) were 3D-printed and post-treated using a microwave. The results indicated that the viscosity and gel strength (indicated by the elastic modulus (G') and complex modulus (G*)) of LJSG were improved with the increase in starch concentration, while water mobility was reduced. During microwave post-treatment, the color change speed was negatively correlated with the gel strength but positively correlated with the diffusion of H+ and anthocyanin concentration. Secondly, nested structures were 3D-printed using MPs containing curcumin emulsion and baking soda (NaHCO3). During microwave post-treatment, the curcumin emulsion structure was destroyed, and NaHCO3 was decomposed, along with an increase in alkalinity; thus, the automatic color change was achieved with the automated presentation of hidden information. This study suggests that 4D printing could enable the creation of colorful and attractive food structures using a household microwave oven, leading to more imaginative solutions regarding personalized foods, which may be particularly important to people with poor appetites.
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