Changes in heart rate of fetal is function regulating performance of the circulatory system and the central nervous system, it is significant to detect heart rate of fetus in perinatal fetal. This paper puts forward the fetal heart rate detection method based on short time Fourier transform and blind source separation. First of all, the mixed ECG signal was preprocessed, and then the wavelet transform technique was used to separate the fetal ECG signal with noise from mixed ECG signal, after that, the short-time Fourier transform and the blind separation were carried on it, and then calculated the correlation coefficient of it, Finally, An independent component that it has strongest correlation with the original signal was selected to make FECG peak detection and calculated the fetal instantaneous heart rate. The experimental results show that the method can improve the detection rate of the FECG peak (R), and it has high accuracy in fixing peak(R) location in the case of low signal-noise ratio.
Electrocardiography ; Fetus ; Heart Rate, Fetal ; Humans

The pathogenesis of diabetic retinopathy (DR) is more complex. For the upstream of traditional pathogenesis, to looking for unifying mechanism theory which proposed in foundation of common promoters and the latest view of DR may be the result of chronic inflammation. Both of them provide the basic and clinical theraby of DR with new direction. Therefore, there are many related issuess till needs to intensive study.

Objective To evaluate the effect of sevoflurane preconditioning on autophagy during ischemiareperfusion (I/R) injury to isolated rat hearts and the role of PI3K/Akt signaling pathway.Methods Healthy adult male Wistar rats,aged 6-8 weeks,weighing 250-280 g,were anesthetized.Their hearts were excised and perfused in a Langendorff apparatus.Eighty-four isolated rat hearts with I/R injury were randomly divided into 7 groups (n =12 each):normal control group (NC group),I/R group,sevoflurane preconditioning group (S + I/R group),normal control plus wortmannin group (NC + W group),I/R plus wortmannin group (I/R + W group),sevoflurane preconditioning plus wortmannin group (S + I/R + W group),and solvent group (S + I/R + D group).In NC group,the hearts were continuously perfused with K-H solution for 180 min.In I/R group,the hearts were perfused with K-H solution for 30 min,and then subjected to ischemia for 30 min followed by 120 min of reperfusion.In S+ I/R group,the hearts were perfused with K-H solution for 10 min,and then with K-H solution saturated with 2.5％ sevoflurane for 15 min,followed by 5 min washout with K-H solution before ischemia.In NC + W group,wortmannin (PI3K inhibitor) 15 μg/kg was injected intraperitoneally at 30 min before chest opening,and the other procedures were similar to those previously described in group NC.In I/R + W group,wortmarnin 15 μg/kg was injected intraperitoneally at 30 min before chest opening,and the other procedures were similar to those previously described in group I/R.In S + I/R + W group,wortmannin 15 μg/kg was injected intraperitoneally at 30 min before chest opening,and the other procedures were similar to those previously described in S + I/R group.In S + I/R + D group,dimethyl sulfoxide 1.5 ml/kg was injected intraperitoneally at 30 min before chest opening,and the other procedures were similar to those previously described in group S + I/R.The HR,± dp/dtmax,left ventricular developed pressure (LVDP) and left ventricular end-diastolic pressure (LVEDP) were recorded at the end of equilibration and reperfusion.At the end of reperfusion,coronary effluent was collected to detect lactate dehydrogenase (LDH) activity,and myocardial specimens were obtained to calculate the percentage of myocardial infract size.The expression of autophagy marker LC3-Ⅱ and Akt,phosphor-Akt (p-Akt),mammalian target of rapamycin (mTOR),and phosphor-mTOR (p-mTOR) was determined by Western blot.Results Compared with NC group,no significant change was found in the parameters of hemodynamics in NC + W group,and HR,± dp/dtmax and LVDP were significantly decreased,LVEDP,myocardial infract size,and LDH activity were increased,LC3-Ⅱ expression was up-regulated,and the expression of p-Akt and p-mTOR was down-regulated in the other groups.Compared with group I/R,HR,± dp/dtmax,and LVDP were significantly increased,LVEDP,myocardial infract size,and LDH activity were decreased,LC3-Ⅱ expression was downregulated,and the expression of p-Akt and p-mTOR was up-regulated in S + I/R and S + I/R + D groups,and no significant change was found in each parameter in S+ I/R+ W group.Compared with S + I/R group,HR,± dp/ dtmax and LVDP were significantly decreased,LVEDP,myocardial infract size and LDH activity were increased,LC3-Ⅱ expression was up-regulated,and the expression of p-Akt and p-mTOR was down-regulated in S + I/R + W group,and no significant change was found in each parameter in S + I/R + D group.Conclusion Sevoflurane preconditioning can decrease autophagy of myocardial cells during I/R through activating PI3K/Akt signaling pathway and enhancing mTOR activity in the downstream,thus protecting isolated rat hearts against I/R injury.

Diabetic macular edema (DME) is a common ocular complication of diabetes patients.It mainly involve macular which is closely related with visual function,thus DME is one of the major reasons causing visual impairment or blindness for diabetes patients.How to reduce the visual damage of DME is always a big challenge in the ophthalmic practice.In the past three decades,there are tremendous developments in DME treatments,from laser photocoagulation,anti-inflammation drugs to anti-vascular endothelial growth factor therapy.However,the mechanism of DME development is not yet completely clear; every existing treatment has its own advantages and weaknesses.Therefore DME treatment still challenges us to explore further to reduce the DME damages.

The procedure of occlusal treatment involves improving the morphology and the stomatognathic function.Several practical methods and morphological endpoints have been described in occlusal rehabilitation.We made a selection of these (mandibular position,oc-clusal plane,occlusal guidance,occlusal contact,face-bow transfer,use of an adjustable articulator and occlusal support)and performed a literature review to verify the existence of compelling scientific evidence for each of these.A literature search was conducted using Medline /PubMed in March 2011.Over 400 abstracts were reviewed,and more than 50 manuscripts selected.An additional hand search was also con-ducted.Of the many studies investigating stomatognathic function in relation to specific occlusal schemes,most studies were poorly designed and of low quality,thus yielding ambiguous results.Overall,there is no scientific evidence that supports any specific occlusal scheme being superior to others in terms of improving stomatognathic function,nor that sophisticated methods are superior to simpler ones in terms of clini-cal outcomes.However,it is obvious that the art of occlusal rehabilitation requires accurate,reproducible,easy and quick procedures to re-duce unnecessary technical failures and /or the requirement for compensatory adjustments.Therefore,despite the lack of scientific evidence for specific treatments,the acquisition of these general skills by dentists and attaining profound knowledge and skills in postgraduate training will be necessary for specialists in charge of complicated cases.

Creatures living in liquid environment can form special exterior structure, internal framework, movement and substance distribution according to their respective living condition. This paper focused on the analysis via examples of macroscopic and microscopic organism. Quantitative analysis is used to make the description more exact and internal features of the organism easier to be examed.

Adult ; Body Mass Index ; Child ; Humans ; Insulin Resistance ; Obesity ; complications ; Sleep Apnea, Obstructive ; etiology ; physiopathology

Objective To explore the effects of alcoholic extracts of traditional Chinese medicines on the post-translational processing and trafficking of tyrosinase.Methods Human YUGEN8 amelanotic melanoma cells were grown in vitro;the cells were incubated with one of the seven traditional Chinese medicines,including Rhizoma Chuanxiong and psoralen.Protein analysis with Western blot,enzymolysis with endoglycosidase H (Endo H),and subcellular localization with laser confocal microscopy were per- formed.The expression,maturity and export from endoplasmic reticulum (ER) of tyrosinase in the treated cells were compared with those in the untreated controls.Results Compared with controls,an approximate- ly 80-kDa,Endo H-resistant tyrosinase doublet,which represented mature glycoform of tyrosinase,was in- creased in melanocytes treated with Semen Cuscutae,and in those treated with Semen Persicae.Within those cells,tyrosinase was distributed outside ER resident protein calnexin.Conclusion Both Semen Cus- cutae and Semen Persicae could induce tyrosinase maturation,stability and export from ER to distal site.

Objective To investigate the prevalence of BK virus(BKV) infection in renal transplant recipients and the methods for its clinical diagnosis and treatment.Methods The urine and blood samples of 64 renal transplant recipients were taken for the BKV cytological and PCR tests.Five clinical factors were investigated to find the etiologic risks of BKV infection in renal transplant recipients.Four BKV infected recipients received experimental treatment.Results The occurrence of urine decoy cell,BKV viruria and viremia in all patients was(28.7 %),(17.2 %) and(6.3 %),respectively.The occurrence of urine decoy cell in serum creatinine(SCR) level elevated recipients was higher than that in SCR stable recipients(P=(0.04)).No significant relationships were found between the five clinical factors(gender,age,induction therapy,acute rejection episode,renal function after transplantation) and the occurrence of urine decoy cell,viruria and viremia.Ganciclovir treatment showed effective in four BKV infected recipients.Conclusions BKV monitoring is necessary for those recipients with evaluated SCR levels after renal transplantation.BKV viremia test can be used as a screening test.The efficacy of ganciclovir in the treatment of BKV infection should be further investigated.

OBJECTIVE:To study the effects of carbamylated erythropoietin(CEPO)on cardiovascular microcirculation in rats with diabetes mellitus. METHODS:Rats were randomly divided into blank control group,model group,CEPO low-dose,medi-um-dose and high-dose groups(500,1 000,2 000 u/kg)with 12 in each group. The rats in the last 4 groups were reduced diabetes mellitus model. All rats were given relevant medicine intragastrically twice a week,coronary microcirculation endothelial cells were separated after consecutive 4 weeks. Enzyme-linked immunosorbent assay was conducted to detect levels of peripheral serum prosta-cyclin (PGI2),vasoconstrictor endothelin-1 (ET-1),angiotensin Ⅱ(AngⅡ) and von Willebrand factor (vWF) of rats in each group;in vitro CCK 8 test was used to detect endothelial cell activity(OD value);real-time quantitative polymerase chain reaction was adopted to detect proliferation-related genes(Ki67,p16),poptosis-related genes(Bad,Bax),and expressions of protein vas-cular endothelial growth factor(VEGF)and AngⅠ. RESULTS:Compared with blank control group,levels of PGI2,ET-1,AngⅡand vWF in serum in model group increased;OD value deceased;Ki67,p16,Bax and VEGF expression decreased;the difference was statistically significant (P<0.05). Compared with model group,levels of PGI2,ET-1,AngⅡ and vWF in serum in CEPO low-dose,medium-dose and high-dose groups increased;OD value increased;Ki67,p16 and VEGF expression increased;expres-sions of Bad and Bax decreased;the difference was statistically significant(P<0.05). The others had no significant difference(P>0.05). CONCLUSIONS:CEPO maybe improve the coronary microcirculation function by upregulating VEGF expression in coro-nary microcirculation endothelial cells and promoting endothelial cells’regeneration.