In order to study the variation of complex impedance and characteristic parameters on human normal and tumor lung tissue during the extracorporeal time, we established a real part-imaginary part chart of complex impedance on lung tissue which provided the basic theory and the reference data for research on elementary medicine and clinical diagnosis of lung cancer and meanwhile provided prior information for electrical impedance tomography (EIT) research. In the experiment carried out in our laboratory, when operation was finished, we kept the lung cancer tissue and normal tissue neatly separated into the cylindrical testing cavities and kept the temperature and humidity at expected values. Then the measurements of complex impedance property are performed at frequency from 1 000 Hz to 30 MHz using 4294A impedance analyzer of Aglient Company. With time changing, the results showed that there was a significant change occurring on the complex impedance of human normal and tumor lung tissue. However, the impedance of normal lung tissue is greater than that of tumor lung tissue. We consider that this change should be related to the change in extracellular fluid, intracellular fluid and cell membrane.
Electric Impedance ; Humans ; Lung ; physiology ; Lung Neoplasms ; pathology ; Tomography

Objective To explore the risk factors and protective factors for stomach cancer in Ganyu county.Methods Data of 319 pairs of new stomach cancer cases and health controls(1:1 matched)were studied by conditional Logistic regression method on the influential factors.Results The main risk factors for stomach cancer were the habits of eating hot foods(OR= 2.21,95%CI:1.57～3.12),the history of upper gastrointestinal inflammation(4.26,2.59～7.03),family history of cancer(2.29, 1.37～3.82);The main protective factors were often eating raw garlic(OR=0.64,95%CI:0.42～0.96),regular drinking tea(0.37, 0.25～0.54).Conclusion Unhealthy dietary habits,the history of upper gastrointestinal inflammation and family history of cancer are related to stomach cancer,while eating raw garlic and regular drinking tea may be effective in preventing the occurrence of stomach cancer.The results could be applied in stomach cancer prevention activities in Ganyu county.

Objective To explore the effect of vitamin D deficiency and falls on osteoporotic fracture (OPF) in patients with rheumatoid arthritis (RA).Methods A total of 852 patients with RA were recruited, anteroposterior and lateral X-rays examination of vertebral column were conducted for every patient.Serum 25-hydroxy vitamin D [25(OH)D] levels and bone mineral density (BMD) of all the vertebrae of lumbar were exam-ined.Clinical and laboratory index of patients were recorded in details meanwhile.Data of 156 normal subjects during the same period were collected as the control group.Numerical data and categorical data comparisons were analyzed using t test, x2 test, single factor analysis of variance test, linear correlation and Logistic regression analysis test.Results ① The prevalence of vertebral OPF in RA was 16.1％(137/852).Compared to RA without OPF, patients with OPF had lower serum 25(OH)D levels [(14±4) ng/ml vs (18±7) ng/ml, t=2.898, P=0.004].② The occurrence rate of falls in RA patients was 19.7％(36/183).Patients with falls had lower serum 25(OH)D levels [(14±4) ng/ml vs (18±6) ng/ml, t=2.854, P=0.005].③ The prevalence of falls in RA with vertebral OPF was higher than that in RA without OPF (38.1％ vs 14.2％,x2=11.708, P=0.001).④ Linear correlation analysis found that serum levels of 25 (OH)D was positively correlated with total lumbar region BMD in RA patients.⑤ Logistic regression analysis revealed that age [OR=1.124, P=0.002, 95％CI: (1.045, 1.209)]and usage of glucocorticostroid (GC) [OR=6.724, P=0.031,95％CI: (1.196, 37.813)] were the risk factors for occurrence of OPF in RA, while serum 25 (OH) D level [OR=0.850, P=0.046, 95％CI: (0.725, 0.997)] was the protective factor.Conclusion Spinal OPF in patients with RA is clearly related with vitamin deficiency, falls and usage of GC.

OBJECTIVETo analyse the correlation between the cellular immunity and TCM Syndrome typing of patients with minimal residual leukemia (MRI).

METHODSThe analysis was performed by detecting cellular immunological parameters in 30 MRI patients, 55 healthy persons and 36 patients with acute leukemia (AL) using three fluoresceine-conjugated monoclonal antibodies and flow cytometer.

RESULTSAs compared with those in the healthy persons, universal reductions of various parameters were shown in the MRI patients, including WBC count, absolute value of total T-lymphocytes, T-helper lymphocyte (P < 0.05) and total lymphocytes; the percentage and absolute value of NK cells (P < 0.01); and the percentages of total T-lymphocytes, CD4+ CD29+, T-suppressor cells and T-memory cells (P < 0.05 or P < 0.01), but without any rising of absolute value. As compared with those in the patients with AL, parameters were similar in the two groups with insignificant difference. The disturbances, including the lowering on ratio of T-helper/T-suppressor lymphocytes, in MRI patients of Qi-blood insufficiency type was the severest, that in the patients of Qi-Yin deficiency type was the mildest, and that in patients of Yin-deficiency with excess Fire type located between them.

CONCLUSIONThe immune function of MRI patients is low, belonging to the TCM Syndrome of vital energy deficiency with evil-lingering. Since the degree of cellular immune disturbance is different in various TCM Syndrome types, therefore, they should be treated with different dosages of different drugs.

Adolescent ; Adult ; Aged ; CD4-CD8 Ratio ; Child ; Diagnosis, Differential ; Female ; Humans ; Immunity, Cellular ; Killer Cells, Natural ; immunology ; Leukemia, Myeloid, Acute ; immunology ; Male ; Medicine, Chinese Traditional ; Middle Aged ; Neoplasm, Residual ; immunology ; Precursor Cell Lymphoblastic Leukemia-Lymphoma ; immunology ; T-Lymphocyte Subsets ; immunology ; Yang Deficiency ; immunology ; Yin Deficiency ; immunology

BACKGROUND: Upper eyelid flap grafting-related vessels such as superficial temporal artery, supratrochlear artery, supraorbital artery trunk are reported. Upper eyelid artery dissection is becoming more and more important for the surgery on the eyelid, but there is a lack of anatomical analysis of upper eyelid artery. OBJECTIVE: To measure the anatomical position of the upper eyelid artery in the eyelid region, and to provide anatomical basis for adjacent flap grafting. METHODS: Twenty adult skull specimens were dissected, and a reference coordinate system was made based on the inner canthus connection for the X axis, and the center line for the Y axis. The red lactoprene was injected into the skull model via common carotid artery.The locations A-E of the upper eyelid artery in the eyelid area were measured. RESULTS AND CONCLUSION: The upper eyelid artery in the eyelid area was mainly from the supratrochlear artery and the supraorbital artery, generally paralleling to the X axis. The upper eyelid branch originated from the supratrochlear artery was located at the projection of the inner canthus, with a total length of 24.50 mm, and a diameter of 0.51 mm, extended to the outer canthus and the diameter of the vessel gradually reduced. The upper eyelid branch originated from the supraorbital artery was located at pupil and inner canthus junction 1/2 projection. The total length of the blood vessels was about 23-24.6 mm, and the diameter of the blood vessels was (0.55±0.05) mm. In the current study, we obtained the surface projecting of upper eyelid artery in the eyelid area by establishing the skull model of blood perfusion, which provides an anatomic basis for upper eyelid flap grafting.

To reveal the effect of rotation cropping and bacterial manure on the growth of Chrysanthemum morifolium and screen the beneficial endophytic, the diversity of endophytic and dominant genera of different treatment groups were analyzed. Four different treatments were continuous cropping, rotation, self-made organic fertilizer and commercially available fertilizer, respectively. Endophytic bacterial diversity and dominant genera in different organs were examined using Terminal Restriction Fragment Length Polymorphism (T-RFLP). The results showed that enzyme Hae III was more appropriate than enzyme Hinfl because the number of TRFs digested by enzyme Hae III was more than that of enzyme Hinfl. In comparison of diversity, the endophytic bacterial communities' diversity index in group of cropping rotation and fertilizer was higher than that of continuous cropping which indicated that the addition of exogenous microorganism in soil could increase the diversity of plant endophyte. 18 dominant species were selected, including 3 kinds of Firmicutes, 4 kinds of Actinomycetes and 11 kinds of Proteobacteria. The results of dominant species comparison showed that the number of dominant species in continuous cropping of Ch. morifolium was significantly less than that of the rotation group. Some dominant bacteria in rotation group and fertilizer group such as Arthrobacter, Streptomyces, Streptomyces, Flavobacterium and Mycobacterium were not found in the continuous cropping of Ch. mortfolium group. Dominant species of fertilizer treatment group was similar with the rotation group, and the continuous cropping group's dominant species was more abundant. It indicates that these bacteria may be able to mitigate hindrance in continuous cropping, especially the Flavobacterium which can decompose the pathogenic fungi is worthy of further attention. Compared with leaves, there are more dominant species in roots and stems. The diversity of edophytic bacterial communities in continuous cropping of Ch. morifolium stays below than that in the rotation of Ch. morifolium, and fertilizer treatment can increase the diversity of continuous cropping so that it could mitigate hindrance in continuous cropping.
Actinobacteria ; physiology ; Agriculture ; Biodiversity ; Chrysanthemum ; growth & development ; microbiology ; Deoxyribonucleases, Type II Site-Specific ; Endophytes ; Fertilizers ; Gram-Positive Bacteria ; physiology ; Phylogeny ; Plant Leaves ; Plant Roots ; microbiology ; Polymorphism, Restriction Fragment Length ; Proteobacteria ; physiology ; RNA, Ribosomal, 16S ; chemistry ; genetics ; Soil ; Soil Microbiology

Objective To investigate the pathological features and differential diagnosis of mixed epithelial and stromal tumor of the kidney(MESTK). Methods Three patients with MESTK were studied by light microscopy and immunohistochemistry,and related literatures were reviewed. Results In the three patients,two were females and one was male,with the mean age of 20 years old.Examined grossly,the tumors were well circumscribed and typically composed of multiple cysts and solid areas.Microscopically,the tumors were composed of epithelial and spindle cells,both of the which were well differentiated with no atypia and mitosis of the nuclei.The immunohistochemical staining showed positive for the cytokeratin in the epithelial cells,and Vimentin,SMA,actin,PgR or ER and WT-1 in the spindle cells.No tumor recurrence and metastasis was found in all the three patients by 25 to 29 months of follow up. ConclusionMESTK is an uncommon mixed renal neoplasm with a favorable prognosis.

Objective to investigate the value of diffusion-weighted echo-planar MR imaging in the diagnosis of head and neck lesions.Methods Fifty-seven patients with 85 head and neck lesions were enrolled in the study,including 22 patients with 22 malignant tumors,13 patients with 13 benign tumors, 13 patients with 17 cystic and liquefactive lesions(including 8 patients with 12 cystic lesions,4 patients with 4 tumor necrosis,1 patients with 1 abcess)and 33 lymph nodes.The lesions were all confirmed by operation and clinical follow up.Echo-planar difffusion-weighted imaging (DWI)was performed with different b values (0,500,and 1,000s?mm~(-2)),and the apparent diffusion coefficients (ADCs)were measured.Results Malignant and benign tumors had different characteristics in DWI with different b values.With the increase of b value,the signal intensity of tumor/spinal cord ratio decreased quickly in DWI in benign tumors,while the signal intensity of tumor/spinal cord ratio remained similar in DWI in malignant tumors.The mean ADC value of'malignant tumors[(0.78?0.24)?10~(-3)mm~2? s~(-1)] was significantly lower than that of benign tumors [(1.48?+0.20)?10~(-3)mm~2?s~(-1)] (t = 8.9,P

Bioprocess equipment is of great importance in application of modern industrial biotechnology.With the rapid development of industrial biotechnology,demands for talents capable of understanding the theory,design and manipulation of modern bioprocess equipment increased.The experiences in aspects such as the building of teachers' contingent,construction of teaching materials,innovation of teaching method from the top-quality course construction of Bioprocess Equipment was discussed in this paper.

OBJECTIVETo observe application value of multispectral animal living imaging technology in rats model of osteoarthritis.

METHODSFifteen male SD rats weighed (180 +/- 20) g (3 months old) were received intra-articular injection of iodoacetic acid for establishing osteoarthritis. Articular cavity of left knee of rats were injected into 50 microl iodoacetic acid. The same volume of sterile saline was injected into right knee articular cavity as control. X-ray living imaging and bone mineral density were observed at 2 and 4 weeks after establishment of model. After 4 weeks,rats were sacrificed and their bilateral joints were collected and determined histologically based on Collins classification and Kellgren-Lawrence classification.

RESULTSOsteoarthritis model was successfully established, compared with control group, model group showed typical manifestation of osteoarthritis, including irregular cartilage surface,osteophyte formation,joint deformity and cartilage defect,and combined with significant decrease of bone density (P < 0.01), while the decrease was not obvious in proximal tibia (P < 0.05). After 2 weeks, knee joints in model group was classified as Collins grade 1 and Kellgren-Lawrence grade 2,then classified as Collins grade 4 and Kellgren-Lawrence grade 3 after 4 weeks,control group showed smooth articular surface,normal joint space and intact cartilage surface, knee joints was classified as Collins and Kellgren-Lawrence grade 0, and bone density of distal femur and proximal tibia were normal.

CONCLUSIONMultispectral animal living imaging technology could be used in dynamic observation of living imaging and detection of bone density in the animal model of osteoarthritis, and it is significant for evaluation of osteoarthritis model, and its realted tesearch.

Animals ; Bone Density ; Disease Models, Animal ; Humans ; Knee Joint ; diagnostic imaging ; Male ; Osteoarthritis ; diagnosis ; diagnostic imaging ; physiopathology ; Radiography ; Rats ; Rats, Sprague-Dawley