Search

In order to achieve the purpose of measuring the height change of the liquid, the method based on the multimode interference effect of the hollow core fiber was used to study the change of the interference spectrum caused by the multimode interference of the light source in the hollow core fiber under the influence of the external medium. The liquid level sensing experiment of the multimode interference effect in the core optical fiber was carried out. The relationship between the interference spectrum of the liquid level sensor and the change of the liquid level and the influence of liquids with different refractive indexes on the measurement results were experimentally studied, and the experimental errors were analyzed. The results show that the liquid level measurement range of the fiber optic liquid level sensor is 0mm ~55mm, when the liquid refractive index is 1.33 and 1.35, the liquid level measurement sensitivity is 0.180nm/mm and 0.224nm/mm, respectively. It is more accurate and feasible to use a sensor with a single-mode-air-core-single-mode structure to measure liquid level changes. [ABSTRACT FROM AUTHOR]

Objective: To analyze the characteristics of respiratory diseases and to provide scientific basis for developing relevant control measures., Methods: 1 300 children with respiratory diseases were treated in hospitals, from Jan. 2013 to May 2014, in the city of Jinan. Characteristics of respiratory diseases were analyzed., Results: The distribution of respiratory diseases in children appeared as: 373 cases of pneumonia (28.7%), 3 cases of pulmonary tuberculosis (0.2%), 467 cases of acute bronchitis (35.9%), 102 cases of asthma (7.8%), and 355 cases of upper respiratory tract infection (27.3%). The upper respiratory tract infection contained 168 cases of tonsillitis (12.9%), 91 cases of pharyngitis (7.0%), 52 cases of laryngitis(4.0%)and 44 cases of iaryngopharyngitis (3.4%). The age distribution of cases with children respiratory diseases appeared as:71 cases <1 years old (5.5%), 385 cases as 1-2 years old (29.6%), 534 cases as 3-6 years old (41.1%), 258 cases as 7-12 years old (19.8%)and 52 cases as >13 years old (4.0%). The seasonal distribution of children respiratory diseases appeared as:364 cases in Spring (28.0% ), 163 cases in summer (12.5%), 315 cases in autumn (24.2%)and 458 cases in winter (35.2%). Regional distribution of children respiratory diseases appeared as:516 cases in urban area (39.7%), 225 cases in suburb (17.3%), 376 cases in townships (28.9%)and 183 in villages (14.1%). 725 strains were isolated and identified that containing 349 strains(48.1%) of Mycoplasma pneumoniae, 136 strains (18.8%) of Haemophilus influenza, 103 strains (14.2% ) of Streptococcus pneumoniae, 82 strains (11.3% ) of Klebsiella pneumoniae, 38 strains (5.2%) of Acinetobacter baumannii, 35 strains(4.8%) of Enterobacter cloacae, 22 strains (3.0%) of Streptococcus pyogenes, 17 strains (2.3%) of Alcaligenes, 16 strains (2.2% of Candida albicans)and 9 strains (1.2%) of Flavobacterium indologenes. 1 288 cases (99.1%) were cured., Conclusion: The common respiratory diseases would include bronchiolitis, pneumonia and upper respiratory tract infections in children, mostly attacking 3-6 year-olds at preschool stage, with spring, winter, urban and township as the prevalent seasons and areas.

Objective: To study the effect of miR-342-3p on the chemotherapy sensitivity in triple-negative breast cancer (TNBC)., Methods: Tissue samples were collected from January 2011 to August 2013 samples in Jiangsu Cancer Hospital from a total of 32 triple-negative breast cancer patients with preoperative chemotherapy, with 5 cases of complete response (CR) and 27 cases of partial response (PR). We detected miR-342-3p expression of TNBC with RT-PCR. We transfected has-miR-342-3p mimic and inhibitor into breast cancer cell lines MDA-MB-231 by lipofection transfection and set up negative control mim-NC and inhi-NC. Group of mimic, mim-NC, inhibitor and inhi-NC were cultivated with 2 μmol /L paclitaxel, cisplatin or 4 μmol/L doxorubicin for 48 h. The cell growth rates were measured by CCK8 reagent kit, and the cell apoptosis rate by flow cytometry., Results: The expressions of miRNA-342-3p in TNBC tissue of CR were higher than those of PR. The cell growth rates of mimic were lower and cell apoptosis rates were higher than those of min- NC after cultivating with paclitaxel or cisplatin for 48 h, with significant difference (P<0.05). The cell growth rates of inhibitor were higher and cell apoptosis rates lower than those of inhi-NC after cultivating with paclitaxel or cisplatin 48 h, with significant difference (P<0.05). The cell growth and cell apoptosis rates of mimic and inhibitor had no difference with those of mim-NC and inhi- NC after cultivating with doxorubicin 48 h (P>0.05)., Conclusion: TNBC with high expression of miR-342-3p are more sensitive to chemotherapy. miRNA-342-3p may regulate the sensitivity of breast cancer cell line MDA-MB-231 to chemotherapy drugs paclitaxel and cisplatin, but can not affect the chemotherapy sensitivity of doxorubicin.

Experiments were carried out on laboratory-scale pulverized coal combustion with different adsorbents. Three solid adsorbents (calcium sulfate, limestone and bauxite) were used to control the emission of heavy metals (Pb, Cd, Cu, Co, Ni) during coal combustion. Sequential extraction procedure was developed for partitioning of metals species in coal ash into five fractions: absorbable metals, exchangeable metals, metals bound to carbonate, metals bound to sulfate, residual metals. The adsorbents showed a certain adsorptive ability to heavy metals, and different adsorbent had different ability. It can be proved from the distribution of heavy metals between coarse ash residues and fine particles and also from the increment of stable speciation of heavy metals in fine particles. Calcium sulfate was effective sorbent for removal of Pb, Cd and Cu, limestone for removal of Pb, Cd, Cu, Ni, and bauxite for removal of these five heavy metals. Fine adsorbents have higher adsorptive ability than coarse adsorbents.