Objectine:To study the cytotoxicity of extracts of dominant indoor airborne fungal culture. Methods:Chinese hamster lung(CHL) cell culture was carried out in vitro.Cells were exposed to extracts of dominant indoor airborne fungal culture,then MTT method and CHL colonies assay were performed to detect their cytotoxicity.The release of cytosolic enzyme Lactate Dehydrogenase(LDH) and the fluidity of K~+,Ca~(2+) were analysed. Results:With the increase of the dose,the LDH levels in culture medium increased and the Ca~(2+) concentration inside cells increased while the K~+ concentration inside cells decreased accordingly. Conclusion:The extracts of dominant indoor airborne fungal culture could damage cell membrane,and have cytotoxicity.

Objective To investigate the precision, trueness, and accuracy of self-developed detection system in clinical chemistry.Methods This was a methodological evaluation.Take serum creatine kinase( CK) for instance, 6 serum sampleswith different leves ( on the upper or lower limit of the reference range or close to the medicine decide levels ( MDLs) , were collected for within-run precision( repeatability) and within-laboratory precision ( intermediate precision ) experiments.5 proficiency testing ( PT ) samples, 5 samples assigned value by reference method, and 40 fresh-frozen serums were measured and compared with reference method for trueness verification.Drawing method evaluation decision chart, calculating total errors and sigma level evaluation experiment based on the CV, bias, and allowed total errors(TEa)were used to evaluate the accuracy performance.The precision, trueness, and accuracy were compared with the quality indicators.Results The within-run precision and within-laboratory precision were less than the highest requirement of Chinese industrial standard.The mean bias was -8.96%, didn′t reachthe required standard (5.5%).After taking corrective actions, all samples but one ( -5.8%) met the required standard. Compared with the reference method, the mean bias on the MDLs was less than TEa.The performance points of the method evaluation decision chart indicated excellence performance.The total errors on MDLs were 14.2%, 10.4% and 7.6%, less than 15%.The sigma levels on MDLs were 5.9, 7.5 and 15, also achieved excellent level. Conclusions The precision, trueness, and accuracy performance of CK measured by self-developed detection system achieved excellent level of the Chinese industry standard, and the same results were found from different evaluation methods.

Objective To study the feasibility of applying nanometer ceramics artificial bone in clinical repair of bone defects. Methods The animal models of bone defect was made on the unilateral radius of 45 New Zealand white rabbits, which were divided into experimental group(repair with nanometer ceramics artificial bone), control group (repair with ceramics artificial bone) and blank group (unrepaired) randomly. The reconstructive effect in each group was evaluated by gross observation, alkaline phosphatase(ALP) detection of blood serum, histopathological observation, X-ray examination and SEM detection at 4th, 8th and 12th weeks postoperatively. Results In the experimental group there was more bone formation than in the control and the blank groups. The differences in reconstructive effect were statistically significant ( P

World Report on Disability discussed the current situation of persons with disabilities, health care, rehabilitation, support and assistance, barrier-free environment, education, employment, and relevant policy recommendations, adhering to the spirit of Convention on the Rights of Persons with Disabilities, using the International Classification of Functioning, Disability and Health as its theoretical structure.Based on the report, this article discussed the revelations to services of rehabilitation for persons with disabilities and their problems,which were advocating new concepts of rehabilitation services, using multidisciplinary rehabilitation model, and strengthening construction of talents in services of rehabilitation.

A rapid, sensitive and convenient LC-MS/MS method was developed for the determination of γ-aminobutyric acid (GABA) in human plasma. d2-γ-Aminobutyric acid (d2-GABA) was synthesized as internal standard (IS). After extraction from human plasma by protein precipitation with acetonitrile, all analytes were separated on a Luna HILIC column (100 mm x 3.0 mm, 3 μm) using an isocratic mobile phase of water: acetonitrile: formic acid (20 : 80 : 0.12) with a flow rate of 0.5 mL x min(-1). Acquisition of mass spectrometric data was performed in multiple reaction monitoring mode (MRM) in positive electrospray ionization using the transitions of m/z 104 --> 69 for GABA and m/z 106 --> 71 for d2-GABA. The method was linear in the concentration range of 5.00 to 1 000 ng x mL(-1). The intra- and inter-day precisions were within 9.9%, and accuracy ranged from 99.1% to 104%, within the acceptable limit across all concentrations. The method was successfully applied to a pharmacokinetic study of GABA tablets in healthy Chinese volunteers.
Chromatography, Liquid ; Humans ; Tandem Mass Spectrometry ; gamma-Aminobutyric Acid ; blood

Objective To compare the effects of antenatal ambroxol and 3-day dexamethasone and 1-day dexamethasone on rats′ fetal lung morphogenesis.Methods Twelve pregnant rats were divided into 4 groups randomly:3-day ambroxol group,3-day dexamethasone group,1-day dexamethasone group and control group,every group had 3 rats.On gestational day 19,cesareans were carried out and the histologic structures of 6 fetal rats lungs of each pregnant rats were observed with light microscope,electronic microscope and image analysis.Results 1.Under the light microscope,compared with control group,fetal rats lung in three treatment groups had more alveolar numbers,larger alveolar space,and thinner alveolar septum(Pa

BACKGROUND: The artificial disc requires a height, a width, and a shape as much as possible to be similar to the original intervertebral disc in order to perfectly distribute the load. At present, most of the data are from foreign countries or measured using X-ray and magnetic resonance imaging, but there are some shortcomings. OBJECTIVE: To diagnose the spinal disease and provide data for the design of a native lumbar disc device by measuring the normal lumbar intervertebral disc using computer tomography (CT). METHODS: A total of 2 235 patients who underwent lumbar CT examination in Liuzhou Worker's Hospital from January 2012 to May 2017 were collected and analyzed. There were 62 cases, including 45 males and 17 females, after being strictly met the inclusion and exclusion criteria. From the age of 20, they were divided into four groups: 20-30, 31-40, 41-50 and more than 50 years old. The range was from L1to S1. The measurement index include intervertebral disc anteroposterior diameter, transerverse diameter, disc volume, sagittal anterior, middle and posterior height, coronal left and right height, and interverterbral angle. RESULTS AND CONCLUSION: (1) In terms of age, there was a statistically significant difference in measurement indexes between L1/2, L2/3 and L3/4(P < 0.05). Therefore, the factor of age should be taken into account. However, there was no statistically significant difference between L4/5and L5/S1segments (P > 0.05). (2) There was a statistical difference between the anterior and middle height of the sagittal position in L4/5and L5/S1(P < 0.05). (3) There were statistical differences between the angles of L2/3, L3/4, L4/5, L5/S1intervertebral space (P <0.05), but the difference of angle between L4/5and L5/S1was the most. (4) There was no statistical difference in the height between the left and right sides of the coronal position (P > 0.05). (5) There was statistical difference between the anteroposterior and transverse diameters of the disc on the adjacent cross section (P < 0.05). (6) The results showed that the lower the segment, the smaller the statistical difference between each group. It is indicated that the age difference should be considered on the L1/2, L2/3, and L3/4segments in the design of lumbar disc or interbody fusion. The lumbar artificial intervertebral disc can be placed in the middle or side. The artificial disc should be designed into the wedge shape instead of a rectangle. These will provide a good anatomical basis for the design of domestic lumbar artificial intervertebral discs.

This is to report the screening, extracting and validating antitumor components and compounds from Stellera chamaejasme L. under the case of discrete distribution of active data. In this work, different components from Stellera chamaejasme L. were collected by HPD macroporous resin and polyamide resin column, and their antitumor activity on A549 were tested by MTT assay. Activity results indicate that activity of components at 30-39 min is more potent than that of Stellera chamaejasme L. extract, and the activity of components at 33.97 min is equivalent to positive drug, cis-platinum at 100 microg x mL(-1), but with totally different mode of action. Under the case of discrete activity, the weight analysis is capable of screening active components and compounds from natural products.
Antineoplastic Agents, Phytogenic ; pharmacology ; Cell Line, Tumor ; Drug Screening Assays, Antitumor ; Humans ; Thymelaeaceae ; chemistry

We investigated the development of an injectable, biodegradable hydrogel composite of poly(trimethylene carbonate)-F127-poly(trimethylene carbonate)(PTMC11-F127-PTMC11 )loaded with bone morphogenetic protein-2 (BMP-2) derived peptide P24 for ectopic bone formation in vivo and evaluated its release kinetics in vitro. Then we evaluated P24 peptide release kinetics from different concentration of PTMC11-F127-PTMC11 hydrogel in vitro using bicinchoninic acid (BCA)assay. P24/ PTMC11-F127-PTMC11 hydrogel was implanted into each rat's erector muscle of spine and ectopic bone formation of the implanted gel in vivo was detected by hematoxylin and eosin stain (HE). PTMC11-F127-PTMC11 hydrogel with concentration more than 20 percent showed sustained slow release for one month after the initial burst release. Bone trabeculae surround the P24/ PTMC11-F127-PTMC11 hydrogel was shown at the end of six weeks by hematoxylin and eosin stain. These results indicated that encapsulated bone morphogenetic protein (BMP-2) derived peptide P24 remained viable in vivo, thus suggesting the potential of PTMC11-F127-PT- MC11 composite hydrogels as part of a novel strategy for localized delivery of bioactive molecules.
Animals ; Biocompatible Materials ; chemistry ; Bone Morphogenetic Proteins ; pharmacology ; Bone and Bones ; drug effects ; Dioxanes ; chemistry ; Drug Delivery Systems ; Hydrogels ; chemistry ; Osteogenesis ; drug effects ; Peptides ; Prostheses and Implants ; Rats

This is to report the screening, extracting and validating antitumor components and compounds from Stellera chamaejasme L. under the case of discrete distribution of active data. In this work, different components from Stellera chamaejasme L. were collected by HPD macroporous resin and polyamide resin column, and their antitumor activity on A549 were tested by MTT assay. Activity results indicate that activity of components at 30-39 min is more potent than that of Stellera chamaejasme L. extract, and the activity of components at 33.97 min is equivalent to positive drug, cis-platinum at 100 microg x mL(-1), but with totally different mode of action. Under the case of discrete activity, the weight analysis is capable of screening active components and compounds from natural products.