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Design and synthesis a series of azo multi-arm liquid crystal monomers (M1-M3) with cholic acid as the chiral core, followed by side chain graft copolymerisation with polymethylhydrosiloxane (PMHS)...

This paper describes the distributed control system design and implementation of third-generation leveler. The system is based on multiple field-buses, and consisted of many distributed computer control system, such as automation station, main operating station, monitoring station, engineers stations and so on. Through PLC control frequency converter, the system has realized the speed of transmission motor and tension control. And through the hydraulic position control loop, the system has realized the roll gap setting and maintained constant pressure. Because of this, in the head and tail, the steel have gained well straightening quality. The plate factory of a steel company used the four-fold hydraulic reversible 11 rolls leveler that is developed by the Taiyuan University of Technology. Through the practice proved, the control system is running well and meeting the control requirement of third-generation leveler.

In this paper, a novel UWB (ultra-wide bandwidth) antenna having a frequency band notch is presented. The ring-slot is used to change the current distribution and realize the frequency notch function. The measured return loss less than −10.0 dB is from 3.1 to 5.0 GHz and from 6.0 to 10.6 GHz, and the frequency notch band is from 5.15 to 5.825 GHz. The simulated gain changes between 2.0 and 6.5 dB within the pass band and varies between −1.5 and 1.0 dB within the band-notched part. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2675–2677, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22824

The design of circularly polarized (CP) microstrip antenna with harmonics suppression is first proposed. The tapered defected ground structure (TDGS) has been utilized to obtain bandstop characteristics. The measured return losses at the second and third harmonic frequencies are −1.2 and −2.7 dB, respectively. The measured CP axial ratio is 0.8 in the broadside direction at 5.53 GHz. The details of the simulated and experimental results for the proposed design are presented and discussed. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2841–2843, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22846

To determine whether CDX2 and villin protein expression are associated with intestinal metaplasia (IM) in gastric cardiac mucosa and to explore the relationship with evolution of gastric cardiac adenocarcinoma (GCA).We studied 143 gastric cardiac biopsy or resection specimens from Henan province China, including 25 cardiac gastritis specimens with IM, 65 dysplasia specimens with IM and 35 gastric cardiac adenocarcinoma specimens and stained them for CDX2 and villin by the immunohistochemical SP method. 15 normal gastric cardiac biopsy specimens were also collected as control.(1) Normal gastric mucosa presented no CDX2 and villin expression. The positive rates of CDX2 protein in cardiac gastritis with IM, dysplasia with IM, and carcinoma tissues were 84.0% (21/25), 66.7% (32/48) and 36.4% (20/55), respectively. While the positive rates of villin protein in cardiac gastritis with IM, dysplasia with IM, and carcinoma tissues were 76.0% (19/25), 70.8% (34/48) and 45.5% (25/55), respectively.There were significant differences among the three groups for both CDX2 and villin (P0.01). Spearman's rank correlation coefficient(rho) showed a close correlation between the two proteins (r=0.843, P0.01) and both were positively related with tumor differentiation (both P0.05), but not associated with age, sex, invasion and metastasis of lymph node (P0.05).Our results suggest that ectopic expression of CDX2 and villin may be involved in early-stage IM and tumorigenesis in gastric cardia and the expression of villin may be regulated by CDX2.

To compare the clinical effect of 3S-type and P-loops digestive reconstruction after total gastrectomy for gastric cancer.From February 2005 to February 2009, 85 cases underwent total gastrectomy in The First Affiliated Hospital of Henan University of Science and Technology. Two types of digestive reconstruction were performed with 3S-type jejunum(n=46) and P-loops Roux-en-Y esophagojejunostomy(n=39). The postoperative complications, nutrition index and the quality of life at half a year after surgery were comparatively analyzed.Two types of digestive reconstruction had no statistical differences in operative time, postoperative complications and mortality(P0.05). Compared with P-loops Roux-en-Y esophagojejunostomy at 6 months after operation, 3S-type jejunum had a lower incidence in dumping syndrome[4.3% (2/46) vs. 10.3% (4/39), P0.05] and reflux esophagitis [10.8% (5/46) vs. 33.3% (13/39), P0.05]. 3S-type jejunum was superior to P-loops Roux-en-Y esophagojejunostomy in serum total protein(55.7±3.1 g/L vs 50.3±5.1 g/L, P0.05), albumin(36.5±3.6 g/L vs. 31.6±4.4 g/L, P0.05), hemoglobin(120.2±13.4 g/L vs. 110.4±23.0 g/L, P0.05), and nutritional assessment index(73.2±4.8 vs. 56.0±6.3, P0.05).Reconstruction of stomach with 3S-type jejunum may be an effective way to prevent reflux esophagitis and dumping syndrome, and to improve the nutritional status and the quality of life.

Bow-Tie loop printed antenna with high gain and broad beam width for 5.8 GHz rectenna application is proposed, analyzed and measured. The high gain of 9.5 dBi can receive more power in a certain power density. And the broad beam width with 90 degrees HPBW (Half Power Beam Width) is able to avoid the precise main beam alignment. The proposed antenna still has the cross polarization level more than 30 dB, and the front-to-back ratio is about -20 dB in the broadside direction. The details of the simulated and experimental results for the proposed design are presented and discussed.

To investigate the role of first pass dynamic 16-slice spiral computed tomography in the evaluation of tumor angiogenesis in patients with non-small cell lung cancer (NSCLC) and to assess its importance in predicting pathologic characteristics.The first pass dynamic 16-slice spiral computed tomography was performed in 33 patients with NSCLC. Their peak heights (PH) were measured with dynamic evaluation software. Their angiogenesis were labelled by anti-CD34 monoclonal antibody. The first pass peak heights (PH) in 33 patients with NSCLC were compared with their microvessel densities (MVD) and their relationships were assessed by linear regression analysis.Among the 33 patients with NSCLCs, the mean first pass PH and MVD of N1-2 were significantly higher than those at stage No (P0.01). The first pass PH of 33 NSCLC was correlated positively with MVDs. To differentiate stage N0 from stage N1-2 with 12 HU cutoff value of the first pass PH, the sensitivity, specificity, accuracy, positive predictive value and negative predictive value were 88.0%, 75.0%, 84.8%, 91.7% and 66.7%, respectively.The first pass dynamic contrast enhanced CT may be a predictor of tumor angiogenesis in patients with NSCLC and its pathologic characteristics, and may be helpful to improve the accuracy of lymph node staging with conventional CT.

To investigate the expression and clinical significance of KiSS- 1 and E- cadherin in gastric cardia carcinoma and the correlation between the two proteins.The expression of KiSS- 1 and E- cadherin in 80 patients with gastric cardia carcinoma and 20 patients with normal gastric cardia epithelium was detected by immunohistochemical technique.The expression of KiSS- 1 was negatively correlated with lymphatic metastasis and clinical stage (P0.05), but not correlated with the cancer differentiation (P0.05). The expression of E- cadherin was negatively correlated with lymphatic metastasis, clinical stage, and cancer differentiation (P0.05). Spearman test showed a positive correlation between KiSS- 1 and E- cadherin expression (r(s)=0.722, P0.05).KiSS- 1 and E- cadherin may play important roles in inhibiting the invasion and metastasis of gastric cardia carcinoma.