Adolescent ; Adult ; Child ; Female ; Humans ; Male ; Middle Aged ; Myringoplasty ; Risk Factors ; Tympanic Membrane Perforation ; etiology ; surgery ; Young Adult

AlM: To investigate and evaluate the prevalence of xerophthalmia among aerospace science and technology staff and its influencing factors for the eye health guidance.
METHODS: The staff underwent physical examination in our examination center from September 2013 to June 2014 were preliminary screened, and those patients with symptoms of dry eye were investigated with questionnaires and diagnosed by basic lacrimal secretion test ( Schirmer l ) , breakup time of tear film ( BUT ) test and fluorescein ( FL) staining test .
RESULTS: There were 606 complaints of dry eye symptoms of the 1 000 premiers, distributed in random (60. 6%), and 432 employees were diagnosed (43. 2%). The positive rate of dry eye was 71. 3%. The causes of xerophthalmia, besides of gender, age, also include a variety of factors such as air-conditioner, heating, video terminals, sleep time, etc.
CONCLUSlON: Dry eye, an epidemic disease, has a variety of symptoms and complex etiology, the main causes of aerospace science and technology staff with dry eye is working environment and some local factors. We can give appropriate health guidance according to the different factors. Meanwhile the relevant series of dry eye screening should also be taken as a routine examination in ophthalmic examination.

Anticonvulsants ; adverse effects ; Humans ; Seizures ; chemically induced

Aortic Aneurysm, Thoracic ; diagnosis ; Child ; Child, Preschool ; Diagnostic Errors ; Female ; Humans ; Infant ; Male

According to ICH, Chinese Pharmacopoeia and supplementary requirements on the separation and purification of herbal extract with macroporous adsorption resin by SFDA, hexane, acetidine, ethanol, benzene, methyl-benzene, o-xylene, m-xylene, p-xylene, styrene, diethyl-benzene and divinyl-benzene of residual organic solvents and macroporous resin residues in Akebia saponin D were determined by headspace capillary GC. Eleven residues in Akebia saponin D were completely separated on DB-wax column, with FID detector, high purity nitrogen as the carry gases. The calibration curves were in good linearity (0.999 2-0.999 7). The reproducibility was good (RSD < 10%). The average recoveries were 80.0% -110%. The detection limit of each component was far lower than the limit concentration. The method is simple, reproducible, and can be used to determine the residual organic solvents and macroporous resin residues in Akebia saponin D.
Chromatography, Gas ; instrumentation ; methods ; Drug Contamination ; prevention & control ; Organic Chemicals ; analysis ; Reproducibility of Results ; Resins, Synthetic ; chemistry ; Saponins ; analysis ; isolation & purification

An analysis method has been established to test 27 elements (Li, Be, B, Mg, Al, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, As, Sr, Mo, Cd, Sn, Sb, Ba, La, Hg, Pb, Bi) in Maca nationality's medicine with microwave digestion-ICP-MS. Sample solutions were analyzed by ICP-MS after microwave digestion, and the contents of elements were calculated according to their calibration curves, and internal standard method was adopted to reduce matrix effect and other interference effects. The experimental results showed that the linear relations of all the elements were very good; the correlation coefficient (r) was 0.9994-1.0000 (Hg was 0.9982) ; the limits of detection were 0.003-2.662 microg x L(-1); the relative standard deviations for all elements of reproducibility were lower than 5% (except the individual elements); the recovery rate were 78.5%-123.7% with RSD lower than 5% ( except the individual elements). The analytical results of standard material showed acceptable agreement with the certified values. This method was applicable to determinate the contents of multi-elements in Maca which had a high sensitivity, good specificity and good repeatability, and provide basis for the quality control of Maca.
Lepidium ; chemistry ; Mass Spectrometry ; methods ; Microwaves ; Reproducibility of Results ; Trace Elements ; chemistry ; isolation & purification

Adult ; Aged ; Antigens, CD34 ; metabolism ; Chondrosarcoma, Mesenchymal ; metabolism ; pathology ; Diagnosis, Differential ; Female ; Follow-Up Studies ; Hemangiopericytoma ; metabolism ; pathology ; radiotherapy ; surgery ; Humans ; Male ; Meningeal Neoplasms ; metabolism ; pathology ; radiotherapy ; surgery ; Meningioma ; metabolism ; pathology ; Middle Aged ; Neoplasm Recurrence, Local ; Proto-Oncogene Proteins c-bcl-2 ; metabolism ; Solitary Fibrous Tumors ; metabolism ; pathology ; Vimentin ; metabolism ; Young Adult

The extracting technology of salidroside, tyrosol, crenulatin and gallic acid from Rhodiolae Crenulatae Radix et Rhizoma was optimized. With extraction rate of salidroside, tyrosol, crenulatin and gallic acid as indexes, orthogonal test was used to evaluate effect of 4 factors on extracting technology, including concentration of solvent, the dosage of solvent, duration of extraction, and frequency of extraction. The results showed that, the best extracting technology was to extract in 70% alcohol with 8 times the weight of herbal medicine for 2 times, with 3 hours once. High extraction rate of salidroside, tyrosol, crenulatin and gallic acid were obtained with the present technology. The extracting technology was stable and feasible with high extraction rate of four compounds from Rhodiolae Crenulatae Radix et Rhizoma, it was suitable for industrial production.
Chemical Fractionation ; methods ; Chemistry, Pharmaceutical ; methods ; Coumarins ; isolation & purification ; Drugs, Chinese Herbal ; isolation & purification ; Gallic Acid ; isolation & purification ; Glucosides ; isolation & purification ; Phenols ; isolation & purification ; Phenylethyl Alcohol ; analogs & derivatives ; isolation & purification ; Rhizome ; chemistry ; Rhodiola ; chemistry

To develop a LC-MS/MS method for the determination of five kinds of trace ginkgolic acids in diterpene ginkgolides meglumine injection materials, the column was Agilent ZORBAX Eclipse plus C18 (3.0 mm x 50 mm, 1.8 µm), and the mobile phase consisted of methanol-water (containing 0.2% formic acid) (95:5) at a flow rate of 0.5 mL · min(-1). The multiple reaction ion monitoring (MRM) with an ESI interface in the negative ion mode was selected. The results showed that the linear ranges of five kinds of ginkgolic acids were in the range of 0.2-36.0 µg · L(-1) (r ≥ 0.999 5). The lowest limit of quantification (LOQ) of ginkgo acid C13: 0, C15:1, C17:2, C15:0 and C17:1 were 0.18, 0.18, 0.21, 0.10 and 0.20 µg · L(-1), respectively. The average recovery was between 73.28% and 87.56%, and the average content of total ginkgolic acids in three batches of samples was in the range of 0.023-0.028 µg · g(-1), which was much lower than 2 µg · g(-1) prescribed in drug registration standards. This method is simple and rapid with high sensitivity, which can be used for the determination of five kinds of trace ginkgolic acids in diterpene ginkgolides meglumine injection materials.
Chromatography, Liquid ; methods ; Ginkgolides ; analysis ; Injections ; Limit of Detection ; Salicylates ; analysis ; Tandem Mass Spectrometry ; methods

OBJECTIVETo evaluate the effect of bicuculline on the first spike latency of the neurons in the inferior colliculus of mice and investigate the role of GABA inhibition in sound signal processing of the neurons.

METHODSIn vivo extracellular recording was performed on the inferior colliculus of 13 BALB/c mice (4 to 5 weeks old) to record the neuronal response to pure tones. Bicuculline, a GABA-A receptor antagonist, was applied to the neurons iontophoretically through one channel in the three-barrel glass-pipettes. The first spike latency and other response properties of the characteristic frequency were recorded for analysis.

RESULTSA total of 30 well-isolated single neurons were recorded. Increased spike counts characterized 96% of the neurons, with either increased (40%) or decreased (60%) latency of neuronal responses. Characteristic frequency alterations occurred in 50% of the neurons with increased spike latency, and the minimum threshold showed linear changes.

CONCLUSIONGABAergic inhibition may participate in the latency formation and increased frequency selectivity of mouse inferior colliculus neurons by lateral inhibition. The changes in the first spike latency can be indicative of the information integration in GABAergic neurons at the synaptic level.

Acoustic Stimulation ; psychology ; Action Potentials ; drug effects ; Animals ; Bicuculline ; pharmacology ; Female ; GABA Antagonists ; pharmacology ; Inferior Colliculi ; physiology ; Male ; Mice ; Mice, Inbred BALB C ; Neurons ; physiology ; gamma-Aminobutyric Acid ; physiology