Objective: To design a new type of maintenance learning machine of ventilator for teaching and experiment combined with electronic technology course of higher vocational education. Methods: ACM804 ventilator was chosen as prototype machine and the electronic technology course of higher vocational education was chosen as theory basis. The designs of internal circuit and gas circuit of prototype machine were improved, besides, some test points and failure points were designed for teaching in classroom. Results: This machine not only could realize all functions of prototype machine, but also could carry forward test teaching and contribute students to maintain common failure in accordance with course content. Conclusion: Through the design of teaching experiment and using of learning machine, the new machine has achieved better teaching effect for students to grasp machine theory and operate actual circuit.

Objective:To investigate the protective effects of neferine on lipopolysaccharide ( LPS)-induced human umbilical vein endothelial cells ( HUVECs) injury. Methods:The optimum inducing concentration of LPS was screened out through pretests and used for the model establishment of HUVECs damage. CCK8 was used to detect the influence of neferine at different concentrations on LPS-induced human umbilical vein endothelial cells ( HUVECs) injury. Nitric oxide ( NO) content was measured by the Griess Reagent method. The nitric-oxide synthase (NOS) activity was assessed by the commercially available kits. Results:The inhibitory rate of HU-VECs was 54. 50% detected by CCK8, which induced by LPS at the concentration of 100 μg·ml-1(P<0. 01). Neferine at the con-centrations of 0. 3-5. 0μmol·L-1 could increase the cell viability in a concentration-dependent manner, while it inhibited the cell pro-liferation at the concentration of 10 μmol·L-1(P<0.05). Neferine could reverse the situation, and the NO release was increased and the tNOS/iNOS activity was increased induced by LPS (P<0. 05). The results shown by the inverted microscope suggested that the floating dead cells were decreased, the cell shape was basically sound and tightly packed with the concentration increase of neferine (0. 3-5. 0μmol·L-1) in a concentration-dependent manner. Conclusion:The results show that neferine has protective effects on HU-VECs injury induced by LPS, and the mechanism may be related with the decrease of intracellular levels of NO and NOS activity.

Nuciferine is a major aporphine alkaloid in the leaves of Nelumbo nueifera. It has great effects such as lipid-lowering,anti-oxidation,antimicrobial activitity and anti-cancer. The review focused on its pharmacological effects and pharmacokinetic characters reported in recent years,which can be helpful to the further researches on nuciferine.

ObjectiveTo investigate the effects of leukocyte-depleted allogeneic blood transfusion on perioperafive cellular immunity in children.MethodsThree hundred and fifty-nine ASA Ⅰ or Ⅱ children aged 3 month-14 yr,weighing 5-74 kg requiring allogeneic blood transfusion during operation were randomly divided into 2 groups:control group (group C,n =163) and leukocyte depletion group (group D,n =196).In group D allogeneic blood was filtered with a leukocyte filter before being transfused during operation.Blood samples were collected from peripheral vein before blood transfusion,and at 2 and 6 d after blood transfusion for determination of levels of CD3+,CD4+,CD8+,and CD56+ by flow cytometry.CD4+/CD8+ ratio was calculated.The volume of allogeneic blood transfused during operation,the duration of operation,postoperative drainage,antibiotics administration and hospital stay and incidence of postoperative infection were recorded.ResultsThe levels of CD3+,CD4+,CD56+ and CD4+/CD8+ ratio were significantly increased at 6 d after blood transfusion while the duration of postoperative drainage,postoperative antibiotics administration and hospital stay and incidence of postoperative infection were significantly decreased in group D compared with group C.ConclusionLeukocyte-depleted allogeneic blood transfusion is helpful in improving the postoperative cellular immunity in children.

Objective To evaluate the role of autophagy in the development of inflammatory pain in the rats.Methods Twenty-four healthy adult male Sprague-Dawley rats,weighing 180-240 g,were randomly divided into 4 groups (n=6 each) by using a random number table:control group (group C),inflammatory pain group (group IP),dimethyl sulfoxide (DMSO) group (group D),and rapamycin (autophagy inducer) group (group R).Inflammatory pain was produced by injecting 50 μl bee venom into the plantar surface of the left hindpaw.In group C,0.9％ normal saline was injected into the plantar surface of the left hindpaw.In group D,2％ DMSO was injected through a gastric tube into the stomach 1 ml per day for 3 consecutive days,and the model was established at 1 h after injection on 3rd day.In group R,rapamycin l0 mg/kg (in 2％ DMSO) was injected through a gastric tube into stomach 1 ml per day for 3 consecutive days,and the model was established at 1 h after injection on 3rd day.The mechanical paw withdrawal threshold (MWT) and thermal paw withdrawal latency (TWL) were measured at 2 h after the model was established.After measurement of the pain threshold,the dorsal horn of the spinal cord was removed for determination of the expression of microtubule-associated protein 1 light chain 3 Ⅱ (LC3 Ⅱ),Beclin-1 and p62 by Western blot.Results Compared with group C,the MWT was significantly decreased,the TWL was significantly shortened in IP and D groups,and the expression of LC3 Ⅱ,Beclin-1 and p62 in the dorsal horn of the spinal cord was significantly up-regulated in IP,D and R groups (P＜0.05 or 0.01).Compared with group IP,the MWT was significantly increased,the TWL was significantly prolonged,the expression of LC3 Ⅱ and Beclin-1 in the dorsal horn of the spinal cord was significantly up-regulated,and the expression of p62 was significantly down-regulated in group R (P＜0.05),and no significant change was found in the parameters mentioned above in group D (P＞0.05).Conclusion Autophagy disorders are involved in the development of inflammatory pain in the rats.

Objective To investigate the therapeutic effects of hepatic resection plus Roux-en-Y choledochojejunostomy in combination with reflux prevention on intrahepatie bile duct stone. Methods The clinical data of 230 patients with intrahepaticbile duet stone surgically treated in our hospital in the past 18 years were retrospectively analyzed. Of the 230 patiets, 110 underwent hepatectomy plus Roux-en-Y choledochojejunostgmy in combination with reflux prevention and the others received other surgeries. The complications of pleural effusions, infection of incisional wound, leakage of bile and retained calculus after operation were studied. Meanwhile, the recurrent rate of stone and long-term effects were determined. Results The occurrinjg rate of pleural effusion, infection of incision wound,leakage of bile was not significantly different among different groups. However, the retained calculus and recurrent rate of stone in the group of patients underwent hepateetomy plus Roux-en-Y choledochojejunostomy in combination with reflux prevention were significantly decreased as compared with other group (P<0.05). So was the effect in long-term (P<0.05). Conclusion Hepatectomy plus Roux-en-Y choledochojejunostomy in combination with reflux prevention could have better effect on patients with intrahepatic bile duct stone.

Objective To evaluate the role of hippocampal mammalian target of rapamycin (mTOR) signaling pathway in inflammatory pain in rats.Methods Sixty adult male Sprague-Dawley rats,weighing 180-240 g,were randomly divided into 4 groups (n=6 each) by using a random number table:control group (group C),inflammatory pain group (group IP),dimethyl sulfoxide (DMSO) group and rapamycin (inhibitor of mTOR) group (group R).Inflammatory pain was produced by injection of honey bee venom 50 μl into the plantar surface of the left hindpaw.While the equal volume of normal saline was given instead in group C.In group D,2％ DMSO was injected through a gastric tube into stomach 1 ml per day lasting for 3 days,and inflammatory pain was produced at 1 h after the last injection on 3rd day.In group R,rapamycin 10 mg/kg (in 2％ DMSO) was injected through a gastric tube into stomach 1 ml per day lasting for 3 days,and inflammatory pain was produced at 1 h after the last injection on 3rd day.At 2 h after the model was established,the mechanical paw withdrawal threshold (MWT) and thermal paw withdrawal latency (TWL) were measured.Rats were sacrificed after measurement of pain threshold,and hippocampal tissues were obtained for detection of the expression of mTOR,phosphorylated mTOR (p-mTOR),ribosomal S6 kinase (S6K) and phosphorylated S6K (p-S6K).Results Compared to group C,the MWT was significantly decreased,TWL was shortened,the expression of p-mTOR and p-S6K was up-regulated,and no significant change was found in the expression of mTOR and S6K in IP and DMSO groups,and no significant change was found in group R in the MWT,TWL and expression of p-mTOR,mTOR,p-S6K and S6K.Compared to group IP,no significant change was found in group DMSO in the MWT,TWL and expression of p-mTOR,mTOR,p-S6K and S6K,and the MWT was significantly increased,TWL was prolonged,the expression of p-mTOR and p-S6K was down-regulated,and no significant change was found in the expression of mTOR and S6K in group R.Conclusion Hippocampal mTOR signaling pathways are involved in the development of inflammatory pain in rats.

Objective To evaluate the effects of leukocyte-depleted allogeneic blood transfusion on perioperative cellular immunity in children.Methods Three hundred and fifty-nine ASA Ⅰ or Ⅱ children (aged 3 months-14 years and weighing 5-74 kg) requiring allogeneic blood transfusion during operation were randomly divided into two groups:163 children receiving normal allogeneic blood transfusion (control group,group C) and 196 children receiving leukocyte-depleted allogeneic blood transfusion (group D).Blood samples were collected from the peripheral vein before blood transfusion,and 2 and 6 days after blood transfusion for determination of the levels of CD3+,CD4+,CD8 +,and CD56+ by flow cytometry.CD4+ /CD8+ ratio was calculated.The volume of allogeneic blood transfusion during operation,the duration of operation,postoperative drainage,antibiotic administration,hospital stay and the incidence of postoperative infection were recorded.Rssults The levels of CD3+,CD4+,CD56+ and CD4+/CD8+ ratio significantly increased at 6 days after blood transfusion while the duration of postoperative drainage,postoperative antibiotic administration,hospital stay and the incidence of postoperative infection significantly decreased in group D compared with group C.Conclusion Leukocyte-depleted allogeneic blood transfusion is helpful in improving the postoperative cellular immunity in children.

Six groups of soft liner/base resin were made into standard test samples of 60.0 mm x 25.0 mm x 3.0 mm, with different soft lining materials/base resin ratios of 0: 3.0, 0.5: 2.5, 1.0: 2.0, 1.5: 1.5, 2.0: 1.0, 2.5: 0.5. The yield strength and resilience of each group were tested by universal testing machine. We found that when the thickness of soft liner increased, the yield strength of samples was reducing, whereas the resilience was enhancing. The change of yield strength and resilience became stabilized between the ratio of 1.5: 1.5 to 2.03: 1.0. We concluded that, under this testing condition, the thickness of soft liner should not exceed 2.0 mm, and we suggested that the ratio of soft liner/base resin should be controlled within the scope of 1/1 to 2/1 according to the whole base thickness.
Acrylic Resins ; chemistry ; Dental Bonding ; Denture Bases ; Denture Liners ; Dentures ; Humans ; Materials Testing ; Stress, Mechanical ; Surface Properties ; Tensile Strength

We tried to find the effects of the application of the antibacterial solution containing silver ions on the surface of the denture soft lining material. We selected the right concentration of the silver-containing solution and coated a soft lining material with the solution so that the soft lining material could be antibacterial. The antibacterial solution containing silver ions was prepared by sol-gel method. MIC of C. a and S. a were tested by broth dilution test. The surface property and thickness were tested after coated. The in vitro antibacterial ratio against C. a and S. a were demonstrated by the method of plate-counting. A film was formed after coating, while the adequacy was not changed. Antibacterial ratio of 0.64 mg/ml group against C. a was 90.82%, and that against S. a was 94.96% in 24 hours, respectively. It was found that the antibacterial property of the soft lining material can be acquired by coating this antibacterial solution with silver ion, without changing the adequacy.
Anti-Bacterial Agents ; chemistry ; pharmacology ; Candida albicans ; drug effects ; Denture Cleansers ; pharmacology ; Denture Liners ; microbiology ; Membranes, Artificial ; Microbial Sensitivity Tests ; Silver ; pharmacology ; Staphylococcus aureus ; drug effects