Objective To investigate the indications to use a temporary pacemaker for bifascicular block in perioperative period.Methods The treatment for 40 patients with heart bifascicular block and a special case were retrospectively studied.All cases,according to their disease history,clinical symptoms,physical ability and atrio-ventricular conduction ability,were divided into two groups:P group(prophylactic insertion of a temporary pacemaker) and N group(without inserting a pacemaker).During operation,we observed whether atrio-ventricular block occurs,the performance of pacemaker and atropine's therapeutic efficacy to bradycardia.Results Anesthesia was postponed in one case because of acute left bundle branch block(LBBB) and the patient died with severe myocardium damage soon after failed resuscitation.All other cases went through anesthesia and operation smoothly.Bradycardia and hypotension could be relieved somewhat by medication in operation,and no complete atrio-ventricular block developed.Conclusion There is no need inserting a temporary pacemaker for chronic bifascicular block if asymptomatic and no atrio-ventricular block.Transesophageal atrial pacing is an easy way to evaluate in quantification atrio-ventricular conduction ability.

A bacterium that contains a chitin deacetylase has been isolated from ocean soil. It has been identified Baciluus .The best suitable condition of producing this enzyme is that pH is 4.0,35℃,and the incubate time is 80 hours in the present of Ca 2+ as well as having no chitosan. The best temperature of this enzyme when it acts is 40℃～50℃ and the best pH range is 4.5～5.0.

The COI gene as DNA barcode was used to identify the Manis pentadactyla and its adulterants in order to provide a scientific basis for the molecular identification of M. pentadactyla. Genomic DNA was extracted from experimental samples using the DNA extraction kit. The COI genes were amplified using polymerase chain reaction (PCR) and sequenced bi-directionally. Obtained sequences were assembled using the CodonCode Aligner. The neighbor-joining (NJ) tree was constructed by MEGA 6.0. The results indicated that COI sequences were successfully amplified and NJ trees results indicated that M. pentadactyla and its adulterants can be easily identification. Therefore, the COI gene is an efficient barcode for identification of M. pentadactyla and its adulterants,which will provide a new technique for the market supervision.
Animals ; Cattle ; DNA Barcoding, Taxonomic ; methods ; Drug Contamination ; prevention & control ; Electron Transport Complex IV ; genetics ; Mammals ; classification ; genetics ; Medicine, Chinese Traditional ; Molecular Sequence Data ; Phylogeny ; Quality Control ; Sheep ; Swine

OBJECTIVETo compare the osseointegration and corrosion of different kind of coatings on pure titanium.

METHODSBy plasma spraying technology, nitrogen silicon zirconium-hydroxylapatite (ZrSiN-HA) compound coating was prepared on the surface of pure titanium and the pure titanium was implanted with the mandible of the experimental animal. The superficial appearance of the compound coating was observed and analyzed by scanning electron microscope (SEM). The ZrSiN-HA, nitrogen silicon zirconium (ZrSiN), hydroxylapatite (HA) and pure titanium were compared and examined. In the four groups, the bone binding force of coatings were detected, and the superficial appearance of the break regions were observed by the electronic multipurpose material testing aircraft. In the four groups, the anticorrosive of coatings were compared and examined on the electrochemistry corrosion testing system.

RESULTSExperimental results indicated that the implant surface sprayed with the ZrSiN-HA was more compact than that sprayed with HA. The crystallization was obvious. Compared with the other coatings, the bone binding force of the ZrSiN-HA coating was the highest, and its anticorrosive performance was the strongest.

CONCLUSIONThe application of ZrSiN-HA coating is advantageous to the long-term retention of implant, and it has huge latent application value to dental dummy.

Animals ; Coated Materials, Biocompatible ; Durapatite ; Materials Testing ; Microscopy, Electron, Scanning ; Nitrogen ; Osseointegration ; Prostheses and Implants ; Silicon ; Surface Properties ; Titanium ; Zirconium

Objective To investigate peoples' awareness degree and attitudes about organ donation in current China.Methods A questionnaire regarding organ donation was designed,including 20 little questions distributed in 10 groups,most of which were choice questions.The major question was people's attitudes on organ donation,and the development of organ donation.The survey was held in the outpatient hall,bustling commercial district and four professional colleges.The interviewees were randomly selected,and their gender,age,education background,profession or major filed were asked to be indicated on the paper.Results 2930 valid questionnaires were acquired in all.The proportion of men to women was nearly 1 ∶ 1.2,with mean age of 38.12 years old; more than 90％ of the interviewees knew organ transplantation,and could choose.some of the transplantable organs;more than 95％ knew organ donation,but the time varied; nearly 90％ of the interviewees approved cadaveric organ donation,and 73％ of them would like to donate their organs post mortem.People who know more about organ failure and organ transplantation can give more supports to organ donation.The young students have much enthusiasm to organ donation,but much professional knowledge is also needed to firm their attitudes.The approval percentage of living organ donation was 65.3％,obviously lower than cadaveric organ donation ( P ＜ 0.05 ).85.7％ of the interviewees approved to compensate the donators family appropriately.62.9％ suggested using media and various kinds of education to increase people's knowledge about organ donation,and only 20％ chose appropriate legislation.Conclusion At present,the public are aware of some general knowledge about organ transplantation and organ donation.Most of the public approve organ donation and would like to donate their organs post mortem.The popularization of organ transplantation can give facilitation to organ donation.Most of the interviewees believe appropriate compensation is necessary for the donator's family.Media and education can promote the development of organ donation.

Background Chondroitin sulphate proteoglycans (CSPGs) can cause the termination of ocular dominance plasticity in the visual cortex.Recently,protein tyrosine phosphatase σ (PTPσ) has been identified as a receptor that inhibits CSPGs.However,whether PTPσ and its downstream molecules participate in the reactivation of ocular dominance plasticity in adult visual cortex has not been studied.Objective The present study was to investigate the changes in the expression of the PTPσ,probabilistic neural networks (PNNs),and molecules downstream of PNN,such as N-cadherin/β-catenin,after the reactivation of adult visual cortical plasticity.Methods Fifty-four SPF Long Evans rats were grouped according to different postnatal week (PW) as the PW1 (6 rats),PW3 (6 rats),PW5 (6 rats),PW7 (24 rats),and PW9 (12 rats) groups,and the upper and lower eyelids were sutured in the 12 rats from the PW7 group for 14 days to establish the binocular plasticity reactivation models.Expression of PTPσ and PNNs in the rat visual cortex was detected using immunochemistry,and changes of PTPσ mRNA,N-cadherin mRNA and β-catenin mRNA expression in the rat visual cortex with plasticity reactivation were assessed by real-time fluorescence quantitative PCR (RT Q-PCR).The use of animals followed the Regulations for the Administration of Affairs Concerning Experimental Animals by State Science and Technology Commission.Results The expression level of PTPσ mRNA was significantly higher in the PW9 group than that of the binocular plasticity reactivation models and the PW7 group (t =1.965,3.526,P＜0.01).The staining of the rat visual cortex for PTPσwas localized to the cellular membrane,cytoplasm and axon.Cell densities of the PW9 group in the Ⅱ-Ⅲ layer,Ⅳ layer and Ⅴ-Ⅵ layer of the visual cortex were elevated in the PW9 rats compared with the PW7 rats (t =24.593,23.444,13.556,P＜0.01) and rats from the binocular plasticity reactivation model (t =44.111,43.000,16.556,P＜0.01).Cell densities for PNNs in the Ⅳ and Ⅴ-Ⅵ layers were significantly increased in the PW9 rats in comparison with the PW7 rats (t=1.926,P＜0.01 ;t=1.370,P＜0.05),but the cell density in the Ⅱ-Ⅱ layer has no statistical significance (t=0.889,P＞0.05).However,cell densities for PNNs in the Ⅱ-Ⅲ and Ⅳ layers in the binocular plasticity reactivation models were lower than those of the PW9 rats (t =2.556,4.585,P＜0.01).Compared with PW1 rats,the expression levels of the N-cadherin mRNA in the PW3,PW5,PW7,PW9 rats were lower (t =28.932,28.988,27.083,28.908,P＜0.01),but those in the PW7 rats were enhanced in comparison with the PW3 rats,PW5 rats and PW9 rats (t =1.848,1.904,1.825,P＜0.01).No significant difference was seen in the expression of the N-cadherin mRNA between the PW9 rats and rats from the binocular plasticity reactivation model (t =0.072,P＞0.05).A statistically significant increase was found in the β-catenin mRNA expression in the PW1 rats compared with the PW3,PW5,PW7 and PW9 rats (t =3.918,3.534,2.645,4.652,P＜ 0.0 1),as well as between rats from the binocular plasticity reactivation model and the PW9 rats (t =0.570,P＜0.01).Conclusions PTPr,PNNs and β-catenin are involved in the reactivation of ocular dominance plasticity in the adult visual cortex.

Abstract: Objective To understand the prevalence and influencing factors of major chronic diseases among Kirgiz residents in Aheqi County, Xinjiang, and to provide theoretical basis for the prevention and control of chronic diseases in this area. Methods　The data of residents in Aheqi County, Kizilsu Kirgiz Autonomous Prefecture, Xinjiang in 2020 for health checkup were selected, and the permanent residents of Kirgiz nationality aged ≥18 were selected as the survey objects, and the prevalence of major chronic diseases and their influencing factors were analyzed by Logistic regression model. Results　A total of 21 935 patients were enrolled, and 10 602 patients suffered from chronic diseases with a prevalence rate of 48.33%, including 4 929 cases of hypertension with a prevalence rate of 22.47%, 4 238 cases of obesity with a prevalence rate of 19.32%, 3 610 cases of dyslipidemia with a prevalence rate of 16.46%, 1 632 cases of anemia with a prevalence of 7.44%, and 1 236 cases of type 2 diabetes with a prevalence of 5.63%. The prevalence of hypertension, obesity, dyslipidemia and type 2 diabetes increased with age, while the prevalence of anemia decreased with age (P<0.01). The prevalence of hypertension dyslipidemia and type 2 diabetes was higher in males than in females, and the prevalence of obesity and anemia was higher in females than in males, with statistical significance (P<0.01). Logistic regression analysis showed that 30-<40 years old (OR=1.836, 95%CI: 1.565-2.034), 40-<50 years old (OR=2.916, 95%CI: 2.613-3.255), 50-<60 years old (OR=5.244, 95%CI: 4.651-5.913), 60 years old and above (OR=10.866, 95%CI: 9.533-12.385), government personnel (OR=1.789, 95%CI: 1.405~2.279), professional and technical personnel (OR=1.774, 95%CI:1.372-2.295), the office staff (OR=1.923, 95%CI: 1.418-2.607) occasional alcohol consumption (OR=1.157, 95%CI: 1.055-1.270) and occasional exercise (OR=1.498, 95%CI: 1.238-1.812) were risk factors for chronic disease. Conclusion　The prevalence of chronic diseases among residents in Aheqi County of Xinjiang is at a low level. Local health institutions have strengthened health education and publicity on multiple chronic diseases and the prevention and control of anemia among young and middle-aged women.

Objective: To investigate the influencing factors for myopia among primary and secondary school students in Suzhou, so as to provide basis for myopia prevention and control. Methods: The students in Grade 4-12 were recruited by stratified cluster random sampling method. Gender, grade, parents＇ myopia history, outdoor activity time and video display terminal time were collected through the questionnaire of National Surveillance Program of Influencing Factors for Common Diseases and Health in Students. Uncorrected visual acuity and cycloplegic refraction were tested. Multivariate logistic regression analysis was performed to explore myopia-related factors. Results: A total of 990 questionnaires were distributed, and 882 valid questionnaires were recovered, with an effective rate of 89.09%. The prevalence rate of myopia was 78.23% ( 690 cases ). Multivariate logistic regression analysis showed that females ( OR=1.703, 95%CI: 1.173-2.474 ) , middle school students ( OR:5.597-11.949, 95%CI: 3.573-28.349 ) , both parents＇myopia ( OR=2.445, 95%CI: 1.597-3.742 ) , video display terminal time over 3 hours per day ( OR=2.026, 95%CI: 1.235-3.325 ) were risk factors for myopia; outdoor activity time over 2 hours per day ( OR: 0.493-0.510, 95%CI: 0.273-0.943 ) was a protective factor for myopia. Conclusion The prevalence of myopia among primary and secondary school students in Suzhou is 78.23%. Gender, grade, parents＇ myopia history, outdoor activity time and video display terminal time are influencing factors for myopia.

In this study, the COI barcode was used to identify the Scolopendra medicinal materials and its adulterants in order to provide a new method for the identification of Scolopendra. Genomic DNA was extracted from the experimental samples. The COI sequences were amplified and sequenced bi-directionally. Sequence alignment and NJ tree construction was carried out by MEGA6.0 software. The results showed that the COI sequences can be obtained from all experimental samples. The average inter-specific K2P distance of Scolopendra was 0.222 and the minimum inter-specific distance was 0.190. All the Scolopendra subspinipes mutilans medicinal samples clustered into a clade in the NJ tree and can be distinguished from its adulterants. In a conclusion, COI can be used to correctly identify Scolopendra medicinal materials, and it will be a potential DNA barcode for identifying other animal medicinal materials.
Animals ; Arthropod Proteins ; genetics ; DNA Barcoding, Taxonomic ; methods ; Drug Contamination ; prevention & control ; Electron Transport Complex IV ; genetics ; Medicine, Chinese Traditional ; Molecular Sequence Data ; Phylogeny ; Quality Control ; Scorpions ; classification ; enzymology ; genetics

Gardeniae Fructus contains volatile ingredients, however, the species and proportions in different processed products of Gardeniae Fructus are different. In this experiment, volatile ingredients were separated by steam distillation with content of 1.2, 1.0, 0.9, 0.7 µL · g(-1) in Gardeniae Fructus, fried Gardeniae Fructus, stir-baked Gardeniae Fructus, Gardeniae Fructus fried into carbon respectively. One hundred and twenty-four kinds of volatile components were identified by GC-MS. Fifty-three kinds of volatile ingredients consisted in Gardeniae Fructus accounting for 93.85%, 54 kinds in fried Cardeniae Fructus accounting for 92.01%, 32 kinds in stir-baked Cardeniae Fructus accounting for 91.59% and 43 kinds in Gardeniae Fructus fried into carbon accounting for 90.81%. In this paper, analysis of Gardeniae Fructus by GC-MS provides a scientific basis for elucidating the mechanism of different processed products.
Chemistry, Pharmaceutical ; Drugs, Chinese Herbal ; chemistry ; Gardenia ; chemistry ; Gas Chromatography-Mass Spectrometry ; Molecular Structure ; Volatile Organic Compounds ; chemistry