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Objective To study the chemical constituents from the flowers of Arundina graminifolia and to find its bioactive compounds.Methods The compounds were extracted by 95％ alcohol and isolated by column chromatography on silica gel and Sephadex LH-20.The structures were identified by spectroscopic analysis (1H NMR,13CNMR and EIMS).Results Eight compounds were obtained and identified as (1) 7-hydroxy-2,4-dimethoxy-9,10-dihydrophenanthrene;(2)coelonin;(3)4,7-dihydroxy-2-methoxy-9,10-dihydro-phenanthrene;(4)ephemeranthoquinone;(5)densiflorol B;(6)4-(3-hydroxyphenyl)-2-butanone;(7) stigmasterol,(8) β-sitosterol.Conclusion Among them,compound 6 is discovered for the first time from the plant.
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OBJECTIVE@#To investigate the imaging manifestations of 16-slice enhanced CT of parotid adenolymphoma in the parotid gland and the corresponding pathology,in order to improve the understanding of the CT imaging manifestations of parotid adenolymphoma in the parotid gland.@*METHOD@#The enhanced CT characteristics of 34 cases of parotid adenolymphoma in the parotid gland confirmed by histological pathology were retrospectively analyzed.@*RESULT@#There were totally 86 lesions in 34 cases, of which 12 cases with lesions in bilateral sides and 22 cases with lesions in unilateral side. Sixty-six lesions located behind and below the superficial lobe of the parotid gland. The lesions showed moderate to obvious enhancement at arterial phase, and the cystic region within the lesions showed no enhancement.@*CONCLUSION@#The relatively specific enhanced MSCT manifestations of parotid adenolymphoma in parotid gland include lesions located behind and below the superficial lobe of parotid gland unilaterally or bilaterally, sometimes exhibited as multiple masses, with clear edge, obvious enhancement and cystic degeneration inside.
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Humans , Adenolymphoma , Diagnosis , Pathology , Parotid Gland , Pathology , Parotid Neoplasms , Diagnosis , Pathology , Tomography, X-Ray ComputedABSTRACT
<p><b>OBJECTIVE</b>To investigate the correlation between enhanced computed tomography (CT) findings and pathological results of rare parotid gland tumors, and improve diagnosis accuracy.</p><p><b>METHODS</b>The enhanced CT manifestations of 22 cases with pathologically documented rare parotid gland tumors, which included 6 cases of basal cell tumor, 5 cases of myoepithelioma, 4 cases of vascular invasion, 3 cases of lymphatic cyst, 3 cases of lipoma, and 1 case of chondrosarcoma, were retrospectively analyzed. The location, size, shape, density, and relationship with surrounding structure were evaluated on CT images.</p><p><b>RESULTS</b>The enhanced CT showed that basal cell tumors occurred in the superficial lobe of the parotid gland, with clear boundary, within the cystic lesion. The lesions were moderate to obviously enhanced, which may be accompanied by enlarged lymph nodes. Myoepithelial tumors were located in the superficial lobe of the parotid gland, with a small cystic prone and microcalcification within a few cases. The lesions were moderate to obviously enhanced. Hemangiomas of soft tissue mass prominent in the parotid gland surface were mild to significantly enhanced. Larger lesions may occupy the entire parotid gland, with uneven density and visible vein stone. The CT density values of the lymphatic cyst were usually higher. Chondrosarcoma mainly manifested cystic mass at the calcification edge. Lipoma with fat density mass exhibited clear boundary without enhancement. Fiber separation could be observed in the lesion.</p><p><b>CONCLUSION</b>CT can reflect the pathological features of rare parotid gland tumors by demonstrating their corresponding imaging features. Enhanced CT is the most effective means of imaging to identify the nature of rare tumor of the parotid gland lesions.</p>
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Humans , Chondrosarcoma , Hemangioma , Lipoma , Parotid Gland , Parotid Neoplasms , Retrospective Studies , Tomography, X-Ray ComputedABSTRACT
Objective Research the bilingual teaching of medical organic chemistry experiment. Methods PBL teaching method was used in bilingual teaching of medical organic chemistry experiment. Results As a result, we improved the effect of bilingual teaching in medical organic chemistry experiment. Conclusion Teaching research found that the teaching mode with a problem-centered and students-orientation approach has improved students' analysis and problem solving skills. During the process of teaching, the students have enhanced their enthusiasm of study.
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The objective of this study was to elucidata the correlation of 16-detector row CT features with the complications and anatomic-pathology of the disease in patients with idiopathic pulmonary fibrosis (IPF). The 16-detector row CT appearances and predominant anatomic distribution were analyzed in 38 cases of IPF. Of the 14 patients (36.8%) with honeycomb lung, 10 (71.4%) had honeycomb appearances predominantly distributed in the peripheral zone of the middle and lower lobes, particularly in the basal segments of the lower lobes. 11 patients (78.6%) had the clinical duration of honeycomb lung for more than 3 years. The interlobular interstitial thickening was seen in 16 cases (42.1%), the interlobular septa thickening in 20 cases (52.6%); and the thickened bronchus-vascular bundle in 9 cases (23.7%). The above-mentioned three kinds of CT features observably distributed in the peripheral zone of the middle and lower lobes, in the basal segments of the lower lobes, and in the lower lobes and middle lobe of right lung in the middle of the zone, respectively. In 15 patients (39.5%), ground-glass opacity was predominantly distributed in the peripheral zone of lung and in the basal segments of the lower lobes; and the clinical duration lasted less than 1 year was seen in 10 cases (66.7%). These results indicated that some characteristic manifestations with pathologic variation and predominant anatomic distribution of IDF can be shown on 16-detector row CT.