4676
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4677
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Liu X. [EEG studies in female adolescent delinquents. Quantitative and visual analysis]. ZHONGHUA SHEN JING JING SHEN KE ZA ZHI = CHINESE JOURNAL OF NEUROLOGY AND PSYCHIATRY 1991; 24:379-81, 386. [PMID: 1800071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Quantitative analysis and visual interpretation on spontaneous brain electrical activity were both undertaken in 41 female adolescents and 55 normal controls. Delinquent group had higher abnormal rate of electrical encephalogram (EEG) than normal group. Spectral power analysis showed that the power of fast activity was increased in central region and the power of all bands (1-30 Hz) was generally decreased in occipital region in delinquents. It indicates that synchronization of EEG in female delinquents may be weak. The results of multi-variate discrimination analysis suggest the possibility of discriminating two groups with quantitative EEG data.
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4678
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4679
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Naqwi A, Durst F, Liu X. Two optical methods for simultaneous measurement of particle size, velocity, and refractive index. APPLIED OPTICS 1991; 30:4949-4959. [PMID: 20717301 DOI: 10.1364/ao.30.004949] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Two optical methods that were developed for recognizing the composition of moving spherical particles as well as measuring their sizes and velocities are described here. Both methods are meant for characterizing single particles with a high spatial and temporal resolution. One method is an extension of the phase-Doppler technique, whereas the other is a newly developed method that utilizes cylindrical waves of laser light to illuminate the particles. The principles of both methods are described, and some experimental data are presented to demonstrate the feasibility of the theoretical concepts.
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4680
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Lee WS, Kao CC, Bryant GO, Liu X, Berk AJ. Adenovirus E1A activation domain binds the basic repeat in the TATA box transcription factor. Cell 1991; 67:365-76. [PMID: 1833071 DOI: 10.1016/0092-8674(91)90188-5] [Citation(s) in RCA: 342] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The adenovirus large E1A protein is a potent activator of transcription. We use several different experimental approaches to demonstrate that the large E1A protein binds specifically and stably to the TATA box-binding factor (TFIID), the general polymerase II transcription factor that initiates assembly of transcription complexes. Sedimentation velocity centrifugation revealed that TFIID and E1A form a heterodimer in vitro. We demonstrate that the activation domain of E1A (conserved region 3) binds to TFIID. E1A interacts with a 51 residue region from the conserved C-terminal domain of TFIID that includes a repeat of basic residues between the homologous direct repeats of TFIID. Analysis of TFIID binding by various E1A mutants indicates that TFIID binding is necessary, although not sufficient, for E1A transactivation.
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4681
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Liu X. [Quantitative EEG analysis and the value for differential diagnosis on depression: I. Spectral power and coherence analysis]. ZHONGHUA SHEN JING JING SHEN KE ZA ZHI = CHINESE JOURNAL OF NEUROLOGY AND PSYCHIATRY 1991; 24:275-7, 317. [PMID: 1752178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Spectral power and coherence analysis were taken on 47 depressive patients and 43 normal controls. Depressive patients showed abnormal brain activity mostly in frontal-central regions. The endogenous and manic-depressive groups mainly presented higher power of slow activity and predominant in right hemisphere, while the non-endogenous and other groups presented higher power mainly in the fast bands. Coherence analysis showed that the coherence of EEG between homogenous points of two hemispheres was decreased in depressed patients.
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4682
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Liu X. [Quantitative EEG analysis and the value for differential diagnosis on depression: II. Multivariate regression and discriminate analysis]. ZHONGHUA SHEN JING JING SHEN KE ZA ZHI = CHINESE JOURNAL OF NEUROLOGY AND PSYCHIATRY 1991; 24:278-81, 317. [PMID: 1752179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Multivariate regression and discriminate analyses were carried out based on the EEG power variables and some related clinical materials from 47 depressed patients and 43 normal controls. The results of regression analysis showed that the severity and duration of depression were associated with EEG slow activity, while the age of first episode and age of the patients were associated with EEG fast activity. Discriminate analysis clearly demonstrates the possible utility of EEG data in the differential diagnosis of depression.
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4683
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Aldridge HK, Liu X, Lin MC, Melius CF. Thermal unimolecular decomposition of 1,3,5-trioxane: Comparison of theory and experiment. INT J CHEM KINET 1991. [DOI: 10.1002/kin.550231009] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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4684
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Chen S, Liu X. [Efficiency evaluation of combined intervention measures with improving drinking water first to prevent infantile acute diarrhea]. ZHONGHUA LIU XING BING XUE ZA ZHI = ZHONGHUA LIUXINGBINGXUE ZAZHI 1991; 12:289-91. [PMID: 1782659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The paper analysed factors of acute diarrhea in children under five by Mantel-Haenszel stratification and Logistic regression. The total person-years of observation were 1332. The results showed that the combined risk factors which caused diarrhea were drinking the pond water and failure to wash hands before eating and so on. The combined intervention Measures, especially improvement of drinking water had effectively decreased the incidence rate of infantile acute diarrhea through the observation in the past two years.
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4685
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Liu L, Liu X. Logic gate modules using opto-optical birefringence switching. OPTICS LETTERS 1991; 16:1439-1441. [PMID: 19776995 DOI: 10.1364/ol.16.001439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
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4686
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Wang B, Cui S, Liu X, Li C, Qiu H, Shi J, Li T. A morphological study of primary pulmonary hypertension--an analysis of six autopsy cases. CHINESE MEDICAL SCIENCES JOURNAL = CHUNG-KUO I HSUEH K'O HSUEH TSA CHIH 1991; 6:178-81. [PMID: 1793883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Six typical autopsy cases of primary pulmonary hypertension are reported. The histopathological features were as follows: medial hypertrophy of the muscular pulmonary arteries, muscularization of arterioles, internal fibrosis and fibroelastosis of muscular pulmonary arteries with typical "onion-skin" configuration, fibrinoid necrosis of the media or necrotizing arteries of muscular pulmonary arteries, and formation of highly characteristic plexiform lesions and dilatation lesions. It is thought that the plexiform lesions seen in all six cases represent morphological changes resulting from pulmonary hypertension rather than congenital abnormalities or thromboembolism.
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4687
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Yang H, Chen F, Liu X, Yi H. [Determination of baicalin in xiaoer feire kechuan mixture by dual-wavelength spectrophotometry]. ZHONGGUO ZHONG YAO ZA ZHI = ZHONGGUO ZHONGYAO ZAZHI = CHINA JOURNAL OF CHINESE MATERIA MEDICA 1991; 16:474-5, 511. [PMID: 1804185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A method for the determination of baicalin in traditional Chinese medicine Xiaoer Feire Kechuan Mixture with dual-wavelength spectrophotometry is described. The interference of coexisting ingredients may be eliminated without separation of the samples. Both 751 and UV-3000 spectrophotometers were used.
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4688
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Liu X, Wang C, Wang X, Wu L, Fang K. [Physico-chemical identification of seven snake-drugs]. ZHONGGUO ZHONG YAO ZA ZHI = ZHONGGUO ZHONGYAO ZAZHI = CHINA JOURNAL OF CHINESE MATERIA MEDICA 1991; 16:395-7, 446. [PMID: 1910501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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4689
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Chen G, Shen Y, Zhang M, Zhu Z, Wang D, Liu X, Ma S. [Studies on warming the middle-jiao and analgesic effect of flos Caryophylli]. ZHONGGUO ZHONG YAO ZA ZHI = ZHONGGUO ZHONGYAO ZAZHI = CHINA JOURNAL OF CHINESE MATERIA MEDICA 1991; 16:429-32, 448 proceeding. [PMID: 1910510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The effects of water extract and ether extract of Flos Caryophylli have been investigated by four experimental gastric ulcer models, choleresis in rats, two diarrhea models in mice, two pain stimulations in mice, and acute liver injury induced by CCl4 in rats. The results suggest that the action of Flos Caryophylli on dispelling the cold by warming the middle-jiao and curing abdominalgia is related to its anti-ulcer, choleresis increasing, anti-diarrhea and analgesic functions.
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4690
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Fei P, Liu X, Sun Y, Zhang T, Liu L. Acinic cell carcinoma in the lacrimal gland--a case report and pathologic study. CHINESE MEDICAL SCIENCES JOURNAL = CHUNG-KUO I HSUEH K'O HSUEH TSA CHIH 1991; 6:110-2. [PMID: 1804375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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4691
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Zwiebel LJ, Hardin PE, Liu X, Hall JC, Rosbash M. A post-transcriptional mechanism contributes to circadian cycling of a per-beta-galactosidase fusion protein. Proc Natl Acad Sci U S A 1991; 88:3882-6. [PMID: 1902573 PMCID: PMC51557 DOI: 10.1073/pnas.88.9.3882] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
The period gene (per) of Drosophila melanogaster affects circadian rhythms. Circadian fluctuations in per mRNA levels are thought to contribute to circadian fluctuations in per protein levels in the heads of adult flies. To address the mechanisms underlying these oscillatory phenomena, we have analyzed RNA and protein cycling from two per-beta-galactosidase fusion genes. These studies demonstrate that 5' noncoding sequences from per are sufficient to cause the fusion mRNA levels to cycle in a wild-type (rhythmic) background. Protein cycling requires additional sequences derived from the per coding region. The data suggest that there is a per-dependent posttranscriptional mechanism that is under circadian clock control required for per protein levels to fluctuate in a rhythmic fashion.
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4692
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Zhang AT, Liu X, Zhang GZ. [Diagnostic value of fibrolaparoscopy and direct-vision peritoneal biopsy in atypical tuberculous peritonitis]. ZHONGHUA NEI KE ZA ZHI 1991; 30:286-8, 318. [PMID: 1831746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Fifty-three cases of atypical tuberculous peritonitis were diagnosed by Machida FLA-8 fibrolaparoscope and direct-vision peritoneal biopsy in our hospital during the last few years. The misdiagnosis rate of this disease is very high. The rate of accurate clinical diagnosis was only 39.6% in patients of this study, while 60.4% was misdiagnosed as other diseases, such as cirrhosis, chronic hepatitis, hepatic carcinoma ovarian cyst etc. In addition, many patients with other diseases were misdiagnosed as tuberculous peritonitis by clinical consideration, for instance, 56 cases who were diagnosed or doubted as tuberculous peritonitis by clinical consideration were diagnosed as other diseases by laparoscopy and liver and peritoneal biopsy under direct-vision. Among them chronic hepatitis accounted for 32 cases, peritoneal carcinoma 11 cases, cirrhosis 7 cases, normal peritoneum, liver, gall bladder and spleen 6 cases. Therefore, the patient who is presumptively diagnosed as tuberculous peritonitis by clinical consideration should have laparoscopy and direct-vision peritoneal biopsy performed.
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4693
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Liu X, Yu QA, Huang ZS, Zwiebel LJ, Hall JC, Rosbash M. The strength and periodicity of D. melanogaster circadian rhythms are differentially affected by alterations in period gene expression. Neuron 1991; 6:753-66. [PMID: 1902699 DOI: 10.1016/0896-6273(91)90172-v] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The per gene of D. melanogaster influences or participates in the generation of biological rhythms. Previous experiments have identified the head as the location from which per exerts its effect on circadian rhythms. To localize further this region and to examine the effects of altered levels and altered spatial expression patterns of the per gene on circadian rhythms of locomotor activity, we have characterized transformed lines containing per gene constructs missing substantial cis-acting regulatory information. The data suggest that wild-type levels of per gene expression are necessary in only a small fraction of the nervous system for near wild-type periods, whereas a larger fraction of per-expressing cells in the brain contributes to the strength of the circadian rhythms.
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4694
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Liu L, Liu X, Cui B. Optical programmable cellular logic array for image processing. APPLIED OPTICS 1991; 30:943-949. [PMID: 20582086 DOI: 10.1364/ao.30.000943] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
An optical parallel architecture is suggested to implement a basic programmable cellular logic array for image processing. Interconnection of the neighboring cells is achieved by using an optical correlator. The required parallel logic gates are executed with spatial coding and electronic thresholding methods. Another optical correlator is used to spatially code the outputs from the 2-bit decoder array of shadowgrams. The optical method for the directional interconnection is also discussed. An image processing example is simulated and verified experimentally.
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4695
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Liu X. [Culture of anaerobic bacteria and antibiotic sensitivity test in ocular infectious diseases]. [ZHONGHUA YAN KE ZA ZHI] CHINESE JOURNAL OF OPHTHALMOLOGY 1991; 27:80-3. [PMID: 1860409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Anaerobes were isolated from 43.9% of 116 eyes with infectious diseases and 21.4% of 140 normal conjunctival sacs. The predominant anaerobes were peptococcus (28.6%) in the former and propionibacterium (53.3%) in the latter. In eyes with infection, only anaerobes were isolated from 27, and a mixture of anaerobes and aerobes in 24. The sensitivity of anaerobes (68 strains) to 10 antibiotics differed significantly from that of aerobes (102 strains). Most anaerobes are sensitive to chloramphenicol and cephaloridine, but not to aminoglycosides or polymyxin B. Therefore, when an ocular infection shows a negative aerobic culture, anaerobic infection should be suspected and chloramphenicol is indicated as first choice for treatment.
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4696
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Zhang Z, Liu X, Ma I. [A nonisotopic enzymolysis assay method of phosphatidylinositol kinase]. HUA XI YI KE DA XUE XUE BAO = JOURNAL OF WEST CHINA UNIVERSITY OF MEDICAL SCIENCES = HUAXI YIKE DAXUE XUEBAO 1991; 22:70-3. [PMID: 1663483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A nonisotopic enzymolysis assay method of phosphatidylinositol kinase (PIK) has been developed. Phosphatidylinositol 4-phosphate (PIP), phosphorylated from phosphatidylinositol (PI) by PIK was hydrolyzed with phosphainositide-specific phospholipase C. The product, inositol 1, 4-bisphosphate (IP2), was separated from inositol 1-phosphate (IP) with Dowex-1 column chromatography. Then, the IP2 was hydrolyzed by alkaline phosphatase to yield PI, and the PI was determined by colorimetry. The PIK activity was defined as PI nmol/mg protein per min. The recovery was 91%, CV = 6.5%
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4697
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4698
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Wang Y, Weidner DJ, Liebermann RC, Liu X, Ko J, Vaughan MT, Zhao Y, Yeganeh-Haeri A, Pacalo RE. Phase Transition and Thermal Expansion of MgSiO
3
Perovskite. Science 1991; 251:410-3. [PMID: 17775105 DOI: 10.1126/science.251.4992.410] [Citation(s) in RCA: 76] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Results from in situ x-ray diffraction experiments with a DIA-type cubic anvil apparatus (SAM 85) reveal that MgSiO(3) perovskite transforms from the orthorhombic Pbnm symmetry to another perovskite-type structure above 600 kelvin (K) at pressures of 7.3 gigapascals; the apparent volume increase across the transition is 0.7%. Unit-cell volume increased linearly with temperature, both below (1.44 x 10(-5) K(-1)) and above (1.55 x 10(-5) K(-1)) the transition. These results indicate that the physical properties measured on the Pbnm phase should be used with great caution because they may not be applicable to the earth's lower mantle. A density analysis based on the new data yields an iron content of 10.4 weight percent for a pyrolite composition under conditions corresponding to the lower mantle. All current equation-of-state data are compatible with constant chemical composition in the upper and lower mantle; thus, these data imply that a chemically layered mantle is unnecessary, and whole-mantle convection is possible.
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4699
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Gangopadhyay H, Cordis GA, Jones R, Liu X, Das DK. Capillary gas chromatography for the assessment of cholesterol oxides in the heart. J Pharm Biomed Anal 1991; 9:1003-8. [PMID: 1822166 DOI: 10.1016/0731-7085(91)80037-a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Recent studies indicated the presence of cholesterol oxides in biological tissues such as heart under pathophysiological conditions. Currently, no suitable method is available to separate and quantitate these oxides in biological tissues. This study was undertaken to develop a method suitable for the quantification of cholesterol oxides in heart. Since under normal conditions cholesterol oxidation does not occur, we exposed isolated perfused rat heart to oxygen-derived free radicals, which are known to oxidize cholesterol in heart. Free radical treated hearts were homogenized and lipids extracted by conventional techniques. The extracted lipids were saponified, and non-saponified portions were extracted with ether. Silyl derivatives of the extracted products were subjected to capillary gas chromatography. One microlitre of the sample was injected onto an SE 54 Supelco capillary column and run by stepwise temperature programming from 230 to 260 degrees C at a rate of 20 degrees C min-1, and then from 260 to 290 degrees C at 6 degrees C min-1. 5-Androsten-3 beta-ol-17-one was used as internal standard. The separated cholesterol oxides were identified by comparing with authentic standards. This method was suitable to separate 7 alpha-hydroxycholesterol, dihydroxycholesterol, 7 beta-hydroxycholesterol, 20 alpha-hydroxycholesterol, cholesterol-5 alpha,6 alpha-epoxide, and 5-cholestene in heart. Since some of these oxides are cytotoxic to the heart, identification of these oxides should be important to understand the pathophysiology of myocardial disease and for the successful therapy to prevent them.
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4700
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Liu X, Samuelson L, Pistol M, Gerling M, Nilsson S. Donor states in GaAs under hydrostatic pressure. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 42:11791-11800. [PMID: 9995487 DOI: 10.1103/physrevb.42.11791] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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