The study aims to investigate the effect of the ratio of long axis to short axis (RLS) of upright polypropylene infusion bag on discharging process and to search the best RLS. Aiming at five different RLS (1. 5 : 1, 2 : 1, 3 : 1, 4 : 1 and 5 : 1, respectively) with the volume of 100 mL, 250 mL and 500 mL, respectively, based on finite element method, analyzing the variation of stress distribution, emptying rate, drugging space and steadiness coefficient, etc. For the bags of the same volume, emptying rate increased with increasing of RLS, but the steadiness coefficient decreased with increasing of RLS. The specific increasing amplitude of emptying rate and decreasing range of steadiness coefficient were as follows: 20% and 49% for 100 mL infusion bag, 9% and 51% for 250 mL infusion bag, and 11% and 46% for 500 mL infusion bag, respectibvely, when RLS increased from 1. 5 : 1 to 5 : 1. Comparatively speaking, the increasing amplitude of the emptying rate is remarkably less than the decreasing range of the steadiness coefficient. By comprehensive consideration of both emptying rate and steadiness coefficient, lower RLS is recommended for upright polypropylene infusion bag.
Drug Delivery Systems ; instrumentation ; Finite Element Analysis ; Polypropylenes

Objective To understand the genetic characteristics of Enterovirus 71 ( EVT1 ) circu-lating strains of Guangdong province in 2008. Methods We isolated an EV71 strain from the fatal case of the hand, foot and mouth disease during an epidemic of Guangdong in 2008. Its complete genome was se-quenced and analyzed comparatively. Results The results showed that the full length of EV71 GDFS-3 ge-nome( not including poly A tail ) is 7405 bp. No insertion or deletion is detected in the coding region. There are several insertions and deletions in 5'and 3'UTR. Phylogenetic analysis of GDFS-3 and reference strains showed GDFS-3 strain shares the highest nueleotide homology with TW984 strain(96.0% ) but low homology with SIN5865, MS and BrCr( about 81.0% ). GDFS-3 strain also shares the highest amino acid homology with TW984 strain(99.0% ). It clustered with reference strains of CA subgenotype in the phylogenetie tree. The nucleotide identity with CA reference strains is 91.0% -95.0%. Conclusion The phylogenetic analysis based on the entire genome demonstrates that GDFS-3 strain has the nearest genetic relationship with TW984 strains ( isolated in 2004). GDFS-3 may belong to the same subgenogroup ( CA ) with Taiwan predominant strains. Otherwise,Some mutations in 5'UTR of EV71 may play the very important role in heightened viru-lence.

Objective To observe hepatocellular apoptosis and inflammatory cytokines expression and their mechanisms after paraquat poisoning in rat.Methods Forty Wistar rats were divided into control group (n =8) and model group (n =32) by random number table.Rats in model group were intraperitoneally injected with 30 mg/kg 20％ paraquat concentrate,while those in control group were injected with normal saline.0.5,1,3,7 days after reproduction of the model,8 rats were sacrificed,and blood was collected from inferior vena cava and hepatic tissue was harvested.The serum levels of interleukin-1β (IL-1 β) and tumor necrosis factor-α (TNF-α) were determined by enzyme-linked immunosorbent assay (ELISA).The mRNA expressions of IL-1β,TNF-α,inducible nitric oxide synthase (iNOS) and p53 were determined by reverse transcription-polymerase chain reaction (RT-PCR).Cysteine-containing aspartate-specific proteases (caspase-3,-8,-9,-12) activity in hepatic tissue was determined on the 3rd day with chromogenic substrate method.The liver histopathological changes were observed after hematoxylin-eosin (HE) staining.Results In model group,hepatic tissue showed extensive necrosis with inflammatory cell infiltration in time dependant manner.Serum IL-1β and TNF-α levels were significantly higher in model group half a day after reproduction than those in control group [IL-1β (ng/L):220.13 ± 69.74 vs.0.14 ± 0.03,TNF-α (ng/L):102.66 ± 26.43 vs.0.16 ± 0.02,P＜ 0.01 and P＜0.05],and peaked on the 3rd day and 1st day [IL-1β:(423.72 ± 153.11) ng/L,TNF-α:(690.35 ± 229.64) ng/L].They then decreased gradually,but were still significantly higher than those in control group on the 7th day [IL-1 β:(357.47 ± 87.28) ng/L,TNF-α:(12.39 ± 5.06) ng/L,both P＜0.05].The contents of IL-1β,TNF-α and iNOS mRNA expressions in hepatic tissue were significantly higher than those in control group,and the highest values were seen on the 1st day,the 1st day,and the 3rd day [IL-1β mRNA (gray value):1.569 ± 0.057 vs.0.123 ± 0.016,TNF-α mRNA (gray value):0.683 ± 0.077 vs.0.261 ± 0.025,iNOS mRNA (gray value):3.259 ± 0.135 vs.0.002 ±0.001,P＜0.05 or P＜0.01].There was no difference in p53 mRNA expression between model group and control group at early stage,and both of them showed low expression,and p53 mRNA expression was significantly higher in model group on the 7th day (gray value:2.959 ± 0.086 vs.0.263 ± 0.032,P＜0.01).In model group,caspase activity (pmol/mg) in liver tissue were significantly higher on the 3rd day than those in control group (caspase-3:857.25 ± 309.26 vs.169.73 ± 48.21,caspase-8:199.18 ± 61.41 vs.32.26 ± 11.09,caspase-9:321.62 ± 80.73 vs.90.38 ± 29.76,caspase-12:413.13 ± 89.77 vs.26.73 ± 9.86,all P＜0.01).Conclusion Paraquat can cause acute liver injury in rats,with caspase-3,-8,-9,-12 activities markedly enhanced,and liver injury may be associated with an early high expression of TNF-α,iNOS and p53 gene.

OBJECTIVETo study the active constituents of Ranunculus ternatus.

METHODThe constituents were isolated with silica gel and Sephadex LH -20 gel column chromatography and purified by HPLC. Their structures were elucidated by spectroscopy.

RESULTSixteen compounds were obtained and identified as Stigmasta4, 6, 8 (14), 22-tetraen-3-one (1), 5-hydroxymethyl furaldehyde (2), gamma-keto-delta-valerolactone (3), pantolactone (4), 5-hydroxymethyl-dihydro-furan-2-one (5), methyl 5-hydroxy-4-oxopentanoate (6), methyl hydrogen succinate (7), succinic acid monoethyl ester (8), 3, 4-dihydroxybenzoic acid methyl ester (9), p-hydroxycinnamic acid (10), 4-oxo-pentanoic acid (11), succinic acid (12), nonanedioic acid (13), 4-hydroxybenzoic acid (14), 4-hydroxybenzaldehyde (15), stigmasterol-3-O-beta-D-glucopyranoside (16).

CONCLUSIONCompound 1, 4 -15 are obtained from this plant for the first time.

Objective: To observe the protective effect of salidroside pretreatment on rabbit heart after limb ischemia/reperfusion (I/R). Methods: A total of 24 New Zealand rabbits were randomly and equally divided into sham operation group, I/R + placebo group （I/R group）and salidroside pretreatment group（salidroside group）. Before establishment of rabbit models of limb I/R, salidroside group received salidroside injection via ear marginal vein, and I/R group received saline injection, once a day for three days. After model establishment, echocardiography was used to evaluate rabbit cardiac function of each group 4h after reperfusion, including left ventricular end-systolic dimension (LVESd), left ventricular end-diastolic dimension (LVEDd), left ventricular ejection fraction (LVEF) and left ventricular fractional shortening (FS). Blood sample was taken to measure serum cardiac troponin I (cTnI) and tumor necrosis factor (TNF)-α. Some ventricular tissue homogenates were taken to measure levels of superoxide dismutase (SOD) and malonyl diadehyde (MDA). Then heart sample was taken to receive pathological examination. Results: Compared with I/R group 4h after reperfusion, there were significant decrease in LVESd [(0.69±0.07) mm vs. (0.62±0.05) mm] and significant increase in LVEF [(64.6±3.4) % vs. (72.1±3.6) %], FS [(34.2±3.2) % vs. (41.7±3.4) %] (P<0.05 all), but these indexes of salidroside group were all no significant different than those of sham operation group (P>0.05). Compared with I/R group, there were significant decrease in cTnI [(5.24±0.34) μg/ml vs. (1.06±0.12) μg/ml], MDA [(8.92±2.18) μmol/L vs. (6.79±1.43) μmol/L] and TNF-α [(37.43±10.02) pg/ L vs. (19.73±6.31) pg/ L], and significant increase in SOD level [(16.61±3.75) U/ml vs. (22.26±4.73) U/ml] in salidroside group (P<0.05 all). Pathological results indicated that injury degree in salidroside group was significantly attenuated than that of I/R group. Conclusion: Salidroside pretreatment could protect cardiac function and relieve rabbit cardiac injury after limb ischemia/reperfusion.

A rapid gas chromatography method was developed for determination of lipase activity using tributyrin as substrate. The standard curves of butyric acid hydrolyzed from tributyrin were linear in the range of 0.11-11.35 mmol L(-1). The recoveries of low, moderate and high concentrations of tributyrin were 90.3%, 104.6%, 89.4% with RSD of 3.01%, 4.50%, 6.64%, respectively. The incubation time was only 5 minutes which was less than with the half time of the conventional titrimetry and spectrophotometry. The optimum pH value was 7.5 and the optimum temperature was 32 degrees C. Based on the Lineweaver-Burk plots, the Michaelis-Menten constant was 0.25 mmol mL(-1). The effect of orlistat on the enzyme inhibiting activity was studied to prove the accuracy of this method. It was found that the half-inhibition concentration (IC50) of orlistat was 0.0485 mg mL(-1). The small total reaction volume, the simple treating procedures, the high accuracy and precision present the advantages of the new method.
Chromatography, Gas ; methods ; Lipase ; analysis ; metabolism ; Triglycerides ; metabolism

The objective of this study is to evaluate the correlation between the absolute ventricular fibrillation voltage (AVFV) computed from electrocardiogram (ECG) and the outcome of defibrillation shocks. Orthogonal ECG (sagittal, x; transverse, y; and longitudinal, z) was recorded from 11 dogs during 10 seconds of electrically induced ventricular fibrillation followed by defibrillation shocks with 50% probability of success. The transvenous two-leads defibrillation system was used to deliver defibrillation shocks. The envelope voltage was estimated by using the Hilbert transform. The comparison of the envelope voltages between 236 successful trials and 249 unsuccessful trials did not show any consistent and statistically significant differences. In contrast with the previously reported correlation, the moving average of AVFV was not higher in the successful trials. In the Z direction, the successful trials had lower voltage than did the unsuccessful trials (P < 0.05). These results suggest that the absolute voltage of ECG during ventricular fibrillation is not robustly correlated with the outcome of defibrillation shocks.
Animals ; Dogs ; Electric Countershock ; Electrocardiography ; methods ; Female ; Male ; Models, Theoretical ; Signal Processing, Computer-Assisted ; Ventricular Fibrillation ; physiopathology ; therapy

A large number of bacteria were carried by mites parasitizing on animals and human,which including symbiotic and pathogenic bacteria.Mites were an important transmission media and could spread pathogenic bacteria.A total of 184 literatures were collected from database to analye diversity of bacteria carried by mites.There were about 105 species bacteria were carried by 94 mites.These bacteria belong to 9 phylums,22 orders,40 families and 55 genuses(including 17 pathogen and 20 opportunistic pathogen).In this paper,we reviewed the diversity of mites-associated bacteria,which could offer some data for investigation on the relationship between mites and mites-associate bacteria.

Objective: To investigate the efficacy and safety of micafungin (MCF) for pulmonary invasive fungal disease (PIFD) in pediatric patients with acute leukemia or post hematopoietic stem cells transplantation. Method: Twenty-five neutropenic PIFD children with acute leukemia or post hematopoietic stem cells transplantation in Sun Yat-sen Memorial Hospital of Sun Yat-sen University were selected from January 2012 to June 2015, including 12 males and 13 females, age range 2-15 (average 6.2±2.0) years. There were 12 cases of acute leukemia (AL) after chemotherapy, 4 cases of acute leukemia (AL) after allogeneic hematopoietic stem cell transplantation (allo-HSCT) and 9 cases of β-thalassemia major after allo-HSCT. All children received MCM for the treatment of PIFD, the dosage of MCM was 3-4 mg/ (kg·d) , once a day. The children received 2 to 6 courses of treatment, individually with a course of 7 days. 1, 3-β-D glucan assay (G test), galactomannan antigen test (GM test), high-resolution CT and the biochemical indexes for organ functions were closely monitored. Result: Twenty-five cases were diagnosed as PIFD, including 2 patients diagnosed as proven, 6 as probable and 17 as possible. Of the 25 cases, 1 was confirmed aspergillus by biopsy pathology and 1 was candida albicans by blood culture. The G and GM test with positive results was 5 and 2 respectively. Chest CT scans of the 25 cases had obvious lesions: air crescent sign and cavitation in 4 cases, diffuse ground glass change in 9 cases, double lung scattered patchy, small nodules and cord like high density shadow in 7 cases, unilateral or bilateral chest wall wedge-shaped consolidation edge in 5 cases and pleural effusion in 5 patients. The effective rate of MCF in treatment of PIFD was 68% (17/25), including 13 cases cured, 4 cases improved, 4 cases were improved clinically and in 4 cases the treatment was ineffective. Eight cases were effective in MCF monotherapy group (12 cases) and nine were effective in MCF combined therapy group(13 cases), respectively. Side-effects including allergies, gastrointestinal side effects, electrolyte disturbances, impairment of liver and kidney function, and myelosuppression were not found in those children treated with MCF. Conclusion Micafungin is effective and safe in the treatment of pulmonary invasive fungal disease in pediatric patients with acute leukemia or post hematopoietic stem cell transplantation.