Objective To explore the role of estradiol decline in the early luteal phase (the 2nd day after oocyte retrieval) in the prediction of in-vitro fertilization outcomes. Methods A total of 236 cases under in vitro fertilization-embryo transfer (IVF-ET)/ intracytoplasmic sperm injection-embryo transfer(ICSI-ET) cycles were included in this retrospective study of their medical records. The cases were divided into three groups according to the levels of estradiol decline on the 2nd day following OPU: group A (n = 70) with the decline rate of less than 70%, group B (n=114) with the decline rate of 70%~80%and group C (n=52) at the decline rate of more than 80%. The comparisons were done among the three groups in terms of the number of oocyte retrieval, the rate of fertilization, the rate of best oocytes and the rate of miscarriage. Results There were no significant differences statistically in the number of oocyte retrieval, the rate of fertilization, the rate of best oocytes and the rate of miscarriage (P > 0.05). But the rates of clinical pregnancy rate in groups A and B were significantly higher than that in group C (68.6% and 68.4% vs. 44.2%) (P < 0.05). Conclusion The levels of estradiol declines in the early luteal phase may be important in the prediction of IVF outcomes.

Objective To establish the biostereometric system of breast volume measurement and to estimate the precision and reliability of the designed system. Methods Biostereometric system of breast volume measurement was built upon the biostereometrics based on computer stereo vision and image processing. One laser projector was used as illuminating source, two CCD cameras were mounted for photo-taken, a series of parallel points were provided through a piece of grating. The volumes of 12 female breast models were tested by water displacement (golden standard) and biostereometric analysis. Results The maximum size of marks we photographed was within 120 mm?140 mm?80 mm. The characters of the system was rapid, non-contact and noninvasive. The validity and reliability of determination of breast volume between biostereometric system and golden standard had no significant difference, compared to water displacement (P=0.473). Conclusions Biostereometric system of breast volume measurement will be suited for the clinical application. The study offers a noninvasive, non-contact, rapid and accurate morphologic method and provides a new theory foundation for morphological analysis.

Objective: To study the effects of parathyroid hormone(PTH) on the calcification characters of cultured human dental papilla mesenchymal(DPM) cells.Methods: DPM cells were cultured up to 35 days in two groups. The control group was cultured in DMEM supplemented with 15% FCS,50 ?g/ml ascorbic acid and 10 mmol/L ?-glycerophosphate. The cells in experimental group were cultured in above mentionned medium containing 33.3 nmol/L of PTH. The medium was changed every 3 or 4 days. Osteocalcin secretion of the cells was measured by radioimmunoassay.Results: Addition of TPH in medium caused a significant increase of osteocalcin secretion from 21 to 35 days culture (P

The online teaching quality assessment system that was established by embedding the professional knowledge into the teaching of literature retrieval course, can help the students master the methods and skills to ac-cess and use the literature information they need and the basic knowledge of subjects in which they major .

In the process of teaching international students laboratory diagnostics,teaching mode has been actively explored. The management of teaching,the foundation of teaching team,the selection of teaching materials and reformation of teaching mode are the key points that affect the teaching quality directly.

Objective To investigate the effects of pentobarbital sodium on compound muscle action potentials (CMAPs) in rats.Methods Ten adult Sprague-Dawley rats (5 males,5 females),aged 8 weeks,weighing 240-260 g,were anesthetized with intraperitoneal 1％ pentobarbital sodium 40 mg/kg.The sciatic nerve was stimulated (intensity 0.50,0.55 and 0.60 V,wave length 0.05 ms,frequency 10 Hz) starting from 8 min after administration.Each intensity was repeated three times at 1 s interval.The stimulation mentioned above was repeated every 5 min.CMAPs from the gastrocnemius muscle were recorded starting from 8 min after administration (T1) and then were recorded every 5 min for 9 times (T2-10),Results The peak value of CMAP was significantly decreased at T3-5 when the intensity was 0.50,0.55 and 0.60 V,and CMAP latency was significantly prolonged at T3-6 when the intensity was 0.50 V,and at T4,5 when the intensity was 0.55 and 0.60 V as compared with those at T1 ( P ＜ 0.05 or 0.01 ).Conclusion Pentobarbital sodium can inhibit CMAPs in rats.

Objective To investigate the feasibility of urethral reconstruction by using stretched electrospun silk fibroin matrices.Methods Stretched electrospun silk fibroin matrix was prepared,and the structure of the material was assessed by electron microscopy.Canine urothelial cells were isolated,expanded and seeded onto the material for 1 week to obtain a tissue-engineered graft.The tissue-engineered graft was assessed using HE staining and electron microscopy scanning.A dorsal urethral mucosa defect was created in 9 female beagle dogs.In the experimental group,tissue-engineered mucosa was used to repair urethral mucosa defects in 6 dogs.No substitute was used in the 3 dogs of the control group.Retrograde urethrography was performed at 1,2 and 6 months after grafting.The urethral grafts were analyzed grossly and histologically.Results Electron microscopy scanning revealed that the material had a 3 dimensional porous structure.Urothelial cells grew on the material and showed good biocompatibility with the stretched silk fibroin matrices.Canines implanted with tissue-engineered mucosa voided without difficulty.Retrograde urethrography revealed no signs of stricture,and histological staining showed gradual epithelial cell development and stratified epithelial layers at 1,2 and 6 months.The canines in the control group showed difficulty in voiding.Retrograde urethrography showed urethral stricture,and histological staining showed that no or only one layer of epithelial cells developed.A severe inflammatory reaction was also observed in the control group.Conclusion Stretched electrospun silk fibroin matrices have good biocompatibility with urothelial cells,and could be a potential material for urethral reconstruction.

Objective To investigate vitamin D ( VD) level and its influencing factors in 4-15-year-old children in southwest of Zhejiang province, so as to guide intervention strategy for improving VD level. Methods A total of 2 620 4 -15-year-old healthy children who visited Lishui People's Hospital for regular physical check-up between January and December 2014 were divided into 4 age groups, namely 4 -6 years (kindergarten), 7 -9 years (lower grades in primary school), 10 -12 years (higher grades in primary school), and 13-15 years (junior middle school).We randomly selected 200 children from each age group using a random number table.A survey using self-developed questionnaire was conducted to obtain information regarding diet, exposure to sunlight, and VD supplement.Serum 25-( OH) D level was measured with electro-chemiluminescence.VD nutritional status and composition, diet, sunlight exposure, VD supplement were com-pared among the groups.Results In southwest Zhejiang, the mean VD level in primary and middle school students was ( 24.76 ±8.39 ) μg/L, clinical deficiency rate was 31.5%, subclinical deficiency rate was 45.0%, and only 23.5% reached the appropriate level, which was even lower ( 14.5%) in junior middle school students.The VD deficiency rate elevated significantly along with the growth of age (P=0.036).The level of VD was positively correlated with sunlight exposure and VD supplementation, and showed significant in-ter-group differences ( all P<0.05 ) .Conclusions The nutritional status of VD is unfavorable and sunlight exposure insufficient in primary and middle school students in southwest Zhejiang province.We should encour-age students to take more outdoor activities and increase sunlight exposure to improve their VD nutritional sta-tus.Children >7 years should be given more attention to in the intervention of increasing sunlight exposure. Students with difficulties in getting adequate sunlight exposure need VD supplements.

Objective: To explore the relationship between the ratio of neutrophil/lymphocyte (NLR) and in-hospital major adverse cardiac events (MACE) in patients with acute ST-elevation myocardial infarction (STEMI) at early admission.
Methods: A total of 420 acute STEMI patients admitted and received primary PCI in our hospital from 2010-01 to 2014-12 were retrospectively studied. The patients were divided into 2 groups:In-hospital MACE group, n=47 and Normal discharged group, n=373. Uni-and multivariate analyses were conducted to assess whether high NLR is the independent predictor for in-hospital MACE occurrence.
Results: Univariate regression analysis indicated that the occurrence rate of in-hospital MACE in high NLR patients were higher than those in low NLR patients (OR=3.19, 95%CI 1.55-2.65, P=0.012). Multivariate regression analysis showed that high NLR was the independent risk factor for in-hospital MACE occurrence in STEMI patients (OR=3.05, 95%CI 1.59-10.54, P=0.015).
Conclusion: High NLR is the independent risk factor for in-hospital MACE occurrence in STEMI patients at the early admission.

Aim To study the inhibitory activities of potential new anti-influenza virus agents,3-O-β-chaco-triosyl pentacyclic triterpenoids against the entry of H5N1influenza viruses.Methods Three target com-pounds were designed and synthesized structurally re-lated to the lead compound 3-O-β-chacotriosyl dioscin derivative (1 )with inhibitory activities against H5N1 influenza viruses.The inhibitory activities of these tar-get compounds were tested at a cellular level pseudo vi-rus system targeting H5N1 influenza viruse entry.Re-sults All the compounds 1 a,1 b and 1 c showed po-tent inhibitory activities against the entry of A/Thai-land/Kan353/2004 pseudo virus into the target cells, of which compound 1 b showed the best inhibitory activ-ity with an IC50 value of (1.25 ±0.22)μmol·L-1. Conclusion The SARs analysis of these compounds indicated that replacement of the aglycone moiety of compound 1 with pentacyclic triterpenoids could in-crease antiviral activity.Different types of pentacyclic triterpen as aglycone residue had the significant influ-ence on the inhibitory activity (1 b >1 c >1 a),sug-gesting ursane type of triterpenes was superior to the two other kinds of triterpenes as aglycone residue.