1726
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Wang G, Zheng Y, Sun A, Wu S, Wang Z. Polarization pinhole interferometer. OPTICS LETTERS 1991; 16:1352-1354. [PMID: 19776968 DOI: 10.1364/ol.16.001352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A polarization pinhole interferometer is based on the principles of pinhole diffraction, a common light path, and the polarization technique in its design. It has many advantages, such as adjustable contrast of the fringes, nondestructive testing, and less sensitivity to environmental factors. The instrument can be used extensively in optical element testing and glue-layer testing. The accuracy of the fringe pattern analysis is controlled by the number of sampled points in the fringes. The analysis results of the closed fringe pattern are given.
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1727
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Kloner RA, Allen J, Cox TA, Zheng Y, Ruiz CE. Stunned left ventricular myocardium after exercise treadmill testing in coronary artery disease. Am J Cardiol 1991; 68:329-34. [PMID: 1858675 DOI: 10.1016/0002-9149(91)90827-8] [Citation(s) in RCA: 108] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Myocardial stunning (postischemic ventricular dysfunction) occurs in dogs after coronary stenosis following treadmill exercise. Less data are available in humans regarding development of stunned myocardium after exercise. Regional wall motion changes were evaluated in 22 patients with known coronary artery disease using 2-dimensional echocardiography and exercise treadmill testing. Wall motion was scored as 1 = normal, 2 = hypokinetic, 3 = akinetic, 4 = dyskinetic. At least 1 left ventricular segment with normal resting function developed an increase in wall motion score at 15 or 30 minutes compared with values at rest. The wall motion score in the midportion of the ventricular septum increased from 1.0 at rest to 1.6 (p less than 0.004) at 30 minutes after exercise; the basal inferior wall score worsened from 1.0 at rest to 1.9 (p less than 0.01) at 30 minutes after exercise. Coronary angiographic data in these patients revealed that left anterior descending narrowing correlated best with left ventricular septal wall motion abnormalities, whereas right coronary artery and circumflex narrowing best correlated with inferior and posterior wall motion abnormalities. Eight normal adult volunteers with no history of myocardial ischemia also underwent 2-dimensional echocardiography and exercise testing. No wall motion abnormalities were observed at any time after exercise. The present study suggests that in patients with coronary artery disease, exercise treadmill testing may induce regional wall motion abnormalities of the left ventricle that persist greater than or equal to 30 minutes after exercise, an observation consistent with the phenomenon of stunned myocardium.
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1728
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Shi D, Ling XS, Xu M, Fang MM, Luo S, Budnick JI, Dabrowski B, Hinks DG, Richards DR, Zheng Y. Erratum: Irreversibility in Ba0.625K0.375BiO3. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 44:933. [PMID: 9999218 DOI: 10.1103/physrevb.44.933.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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1729
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Giam C, Ahmed M, McAdoo D, Zheng Y, Holliday T. Characterization of ethylguanine isomers and structurally related compounds by laser-desorbed cationization in a Fourier transform mass spectrometer. Anal Chim Acta 1991. [DOI: 10.1016/s0003-2670(00)83818-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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1730
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Loong C, Hinks DG, Vashishta P, Jin W, Kalia RK, Degani MH, Price DL, Jorgensen JD, Dabrowski B, Mitchell AW, Richards DR, Zheng Y. Oxygen isotope effect in superconducting Ba1-xKxBiO3 from phonon density of states. PHYSICAL REVIEW LETTERS 1991; 66:3217-3220. [PMID: 10043729 DOI: 10.1103/physrevlett.66.3217] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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1731
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Zheng Y, Barillot JC, Bianchi AL. Are the post-inspiratory neurons in the decerebrate rat cranial motoneurons or interneurons? Brain Res 1991; 551:256-66. [PMID: 1913156 DOI: 10.1016/0006-8993(91)90940-w] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
We examined the membrane potentials of 63 respiratory neurons in the ventrolateral medulla of decerebrate rats, whose trajectories had the characteristics of the post-inspiratory neurons, i.e. exhibiting hyperpolarization during inspiration, rapid depolarization at end-inspiration and progressive repolarization with a decrementing pattern during the intervals between phrenic bursts. Synaptic responses of 6 post-inspiratory neurons which were tested by stimulation of cervical vagus or superior laryngeal nerves were excitatory. Eleven of these 63 post-inspiratory neurons were labeled by intracellular injection of horseradish peroxidase (HRP). Ten of these 11 labeled neurons were motoneurons since their axons exited the medulla after joining the roots of cranial nerves. However, only one of these motoneurons was antidromically activated by stimulation of the ipsilateral cervical vagus nerve. We assumed that most of the post-inspiratory medullary neurons of the present study were motoneurons, but not interneurons, although antidromic invasion was not possible after stimulation of the cervical vagus and superior laryngeal nerves. Two post-inspiratory neurons of this sample had bulbospinal axons, which were revealed by antidromical activation of spinal cord and HRP labeling, respectively. The axon of the labeled bulbospinal neuron had axonal collaterals which were distributed within the region of the nucleus ambiguous of the ipsilateral medulla. The functional significance of this type of post-inspiratory neuron is discussed.
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1732
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Chen Z, Qing D, Zheng Y, Xie B. [Role of nucleus parabrachialis medialis in the "renzhong" induced pressor response in rabbits]. HUA XI YI KE DA XUE XUE BAO = JOURNAL OF WEST CHINA UNIVERSITY OF MEDICAL SCIENCES = HUAXI YIKE DAXUE XUEBAO 1991; 22:144-7. [PMID: 1786950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Experiments were performed on 18 rabbits, bivagotomized, gallamine triethiodide immobilized and artificially ventilated. The effects of electrical stimulation of "renzhong" (Du 26) area and NPBM, separately and simultaneously, on arterial blood pressure and heart rate were observed before and after electrolytic or chemical lesion of NPBM. Electrical stimulation of "renzhong" area or NPBM, separately could elicit an increase in arterial blood pressure; when both "renzhong" and NPBM were stimulated, the pressor response to NPBM stimulation could affect that of "renzhong" area's. But after electrolytic or chemical lesion of NPBM, stimulation of NPBM could no longer elicit pressor response. On the other hand, the pressor response induced by electrical stimulation of "renzhong" area decreased obviously, after lesion of NPBM or transection of brain stem between NPBM and Nucleus trigemini principalis. These results suggest that NPBM might take part in the pressor response of "renzhong" area stimulation.
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1733
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Zhou H, Zheng Y, Konzak CF. Osmotic potential of media affecting green plant percentage in wheat anther culture. PLANT CELL REPORTS 1991; 10:63-66. [PMID: 24221395 DOI: 10.1007/bf00236458] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/1990] [Revised: 04/11/1991] [Indexed: 06/02/2023]
Abstract
The percentage of green plants in anther culture is known to be controlled by the genetics of anther donor materials. The objective of this study was to determine whether components in the culture media also would have a significant influence on the percentage of green plants from wheat anther culture. Anthers of a spring wheat cultivar, "Pavon 76", were cultured on potato 4 (P4) induction media with various modifications. Addition of 200 g/l ficoll to the liquid P4 medium significantly increased the percentage of green plants even though the final yield of green plants per 100 anthers was lower than the liquid medium. A higher concentration of maltose (135 g/l) produced significantly higher percentage of green plants than the medium containing 90 g/l maltose or sucrose. These results demonstrate culture medium effects on albinism, indicating that the percentage of green plants in wheat anther culture can be increased by optimizing medium osmotic potential.
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1734
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Zheng Y, Jung MK, Oakley BR. Gamma-tubulin is present in Drosophila melanogaster and Homo sapiens and is associated with the centrosome. Cell 1991; 65:817-23. [PMID: 1904010 DOI: 10.1016/0092-8674(91)90389-g] [Citation(s) in RCA: 360] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The mipA gene of A. nidulans encodes a newly discovered member of the tubulin superfamily of proteins, gamma-tubulin. In A. nidulans, gamma-tubulin is essential for nuclear division and microtubule assembly and is associated with the spindle pole body, the fungal microtubule organizing center. By low stringency hybridizations we have cloned cDNAs from D. melanogaster and H. sapiens, the predicted products of which share more than 66% amino acid identity with A. nidulans gamma-tubulin. gamma-Tubulin-specific antibodies stained centrosomes of Drosophila, human, and mouse cell lines. Staining was most intense in prophase through metaphase when microtubule assembly from centrosomes was maximal. These results demonstrate that gamma-tubulin genes are present and expressed in humans and flies; they suggest that gamma-tubulin may be a universal component of microtubule organizing centers; and they are consistent with an earlier hypothesis that gamma-tubulin is a minus-end nucleator of microtubule assembly.
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1735
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Zhou ZZ, Zheng Y, Monson FC, Wein AJ, Ruggieri M, Levin RM, Hanno P, McKenna BA, Teuscher C. Immunohistochemical analysis of the urinary bladder: a comparative study of the cellular immune response of patients diagnosed as having interstitial cystitis, noninterstitial cystitis voiding dysfunctions, and normal controls. SEMINARS IN UROLOGY 1991; 9:115-9. [PMID: 1853007] [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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1736
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Zheng Y, Barillot JC, Bianchi AL. Patterns of membrane potentials and distributions of the medullary respiratory neurons in the decerebrate rat. Brain Res 1991; 546:261-70. [PMID: 2070263 DOI: 10.1016/0006-8993(91)91490-r] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
We analyzed the membrane potential of 161 respiratory neurons in the medulla of decerebrate rats which were paralyzed and ventilated. Three types of inspiratory (I) neurons were observed: those displaying progressive depolarization in inspiration (augmenting I neurons), those which gradually repolarized after maximal depolarization at the onset of inspiration (decrementing I neurons) and those exhibiting a plateau or bell-shaped membrane potential trajectory throughout inspiration (I-all neurons). Three types of expiratory (E) neurons were also encountered: those in which the membrane potential progressively depolarized (augmenting E neurons), those in which the membrane potential repolarized during the interval between phrenic bursts (decrementing E or post-I neurons) and those exhibiting a plateau or bell-shaped membrane potential trajectory throughout expiration (E-all neurons). Axonal projections of these medullary neurons were identified in the cranial nerves (n = 34), or in the spinal cord (n = 19) as revealed by antidromic stimulation and/or by reconstruction following horseradish peroxidase (HRP) labeling. The other 108 neurons were not antidromically activated (NAA) by the stimulations tested, or had their axons terminating inside the medulla as revealed by HRP labeling. All these respiratory neurons, except for 3 which were hypoglossal motoneurons, had their somata within the ventrolateral medulla, in the region of the nucleus ambiguus, homologous to the ventral respiratory group (VRG) of the cat. No dorsal respiratory group (DRG) was detected within the medulla of the rats. Due to this absence of a DRG, it is concluded that the neural organization of respiratory centers is quite different in cats and rats.
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1737
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Cohen S, Khan A, Zheng Y, Chiles J. Tardive dyskinesia in the mentally retarded: comparison of prevalence, risk factors and topography with a schizophrenic population. Acta Psychiatr Scand 1991; 83:234-7. [PMID: 1674398 DOI: 10.1111/j.1600-0447.1991.tb05530.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Thirty mentally retarded patients treated with neuroleptics for aberrant behavior were compared with 30 neuroleptic-treated schizophrenics for the presence, topography and risk factors associated with tardive dyskinesia (TD). In the total sample (n = 60), female sex, schizophrenic diagnosis and increasing age were associated with TD. The length of neuroleptic treatment and current neuroleptic dose were not significantly associated with TD. The only topographical difference in TD presentation was that the mentally retarded group had significantly more tongue involvement.
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1738
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Salem-Sugui S, Alp EE, Mini SM, Ramanathan M, Campuzano JC, Jennings G, Faiz M, Pei S, Dabrowski B, Zheng Y, Richards DR, Hinks DG. Determination of the local structure in Ba1-xKxBiO3 by x-ray-absorption spectroscopy. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 43:5511-5515. [PMID: 9997949 DOI: 10.1103/physrevb.43.5511] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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1739
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1740
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Shi D, Ling XS, Xu M, Fang MM, Luo S, Budnick JI, Dabrowski B, Hinks DG, Richards DR, Zheng Y. Irreversibility in Ba0.625K0.375BiO3. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 43:3684-3687. [PMID: 9997693 DOI: 10.1103/physrevb.43.3684] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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1741
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Osseo-Asare K, Zheng Y. Solubilization and metal complexation in a reversed micellar hydroxyoxime—sulfonic acid liquid—liquid extraction system. ACTA ACUST UNITED AC 1991. [DOI: 10.1016/0166-6622(91)80146-f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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1742
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Zheng Y. [Plasma estrogen level in patients with cervical cancer]. ZHONGHUA ZHONG LIU ZA ZHI [CHINESE JOURNAL OF ONCOLOGY] 1990; 12:404-5. [PMID: 2076633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Plasma estrone (E1), estradiol (E2) and estriol (E3) levels were determined in 51 cases of cervical cancer and 52 normal postmenopausal women. It was found that the plasma E1, E2 and E3 levels in cervical cancer patients were higher than those in normal postmenopausal women. There was a significant difference in E1 and E3 between the two groups (P less than 0.05). E1/E2, E2/E3, E1/E3 and E1/E2 + E3 were measured in the two groups. E1/E2 ratio in cervical cancer patients was higher than that in normal postmenopausal women (P less than 0.05).
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1743
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Zheng Y, McCarthy IE, Weigold E, Zhang D. Direct Observation of the Momentun-Density Profile of Excited and Oriented Sodium Atoms. PHYSICAL REVIEW LETTERS 1990; 64:1358-1360. [PMID: 10041375 DOI: 10.1103/physrevlett.64.1358] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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1744
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Zheng Y, Zhan H, Wu X. Structure of 2-(acetonitrile)-2,3,4-tris(diethyl dithiophosphato-S,S')-1-iodo-tetrakis(μ3-sulfido)-3,4-μ2-trichloroacetato-copper(I)tritungsten(IV). Acta Crystallogr C 1989. [DOI: 10.1107/s0108270189007511] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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1745
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Lei S, Huang Q, Zheng Y, Jiang A, Chen C. Structure of calcium fluoroborate, Ca5(BO3)3F. Acta Crystallogr C 1989. [DOI: 10.1107/s0108270189004361] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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1746
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Zheng Y, Zhu N, Wu X. Structure of 2,3,4-tris(diethyl dithiophosphato-S,S')-1-iodo-2,3-μ2-methanoato-4-(pyridine)-tetrakis(μ3-sulfido)-copper(I)trimolybdenum(IV). Acta Crystallogr C 1989. [DOI: 10.1107/s0108270189007456] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
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1747
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Zheng Y, Xu ML, Yang SR. [Mechanisms of effects of electrical stimulation of "Renzhong" (Du 26) on phrenic discharge in rabbits]. HUA XI YI KE DA XUE XUE BAO = JOURNAL OF WEST CHINA UNIVERSITY OF MEDICAL SCIENCES = HUAXI YIKE DAXUE XUEBAO 1989; 20:384-8. [PMID: 2630416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Experiments were performed on urethane anesthetized, bivagotomized, flaxedil paralyzed and artificially ventilated rabbits. The effects of stimulation of "Renzhong" (Du 26) on phrenic discharge were not caused secondarily by blood pressure alteration. The effects were abolished by bilateral section of infraorbital nerves, were similar to those of stimulation of the central end of the infraorbital nerve, and were not qualitatively changed by mid-colliculi decerebration. The responses of the bulbar respiratory related neurons were coordinated with those of the phrenic nerve to stimulation of "Renzhong", i.e., the responses of almost all of the inspiratory neurons were consistent with phrenic responses and those of the most of the expiratory neurons were contrary to them. It can be concluded that the effects of electrical stimulation of "Renzhong" on phrenic discharge result from the nervous reflex. Its afferent is infraorbital nerve and the higher centers are not essential for it. The bulbar respiratory related neurons might play an important part in it.
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1748
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Kwok WK, Welp U, Crabtree GW, Vandervoort KG, Hulscher R, Zheng Y, Dabrowski B, Hinks DG. Magnetic and resistive measurements of the superconducting critical fields of melt-cast Ba0.65K0.35BiO3. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 40:9400-9403. [PMID: 9991452 DOI: 10.1103/physrevb.40.9400] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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1749
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Zheng Y, Sundstrom SA, Lyttle CR, Teuscher C. Differential expression of estrogen-regulated CD4 and Ia positive cells in the immature rat uterus. J Leukoc Biol 1989; 46:493-6. [PMID: 2478646 DOI: 10.1002/jlb.46.5.493] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Estradiol treatment of sexually immature Sprague-Dawley, Cr:NIH-nu/+ and Cr:NIH-nu/nu rats for 2 days results in a significant increase in the number of uterine eosinophils and OX-42 positive macrophages. However, only Sprague-Dawley rats exhibit an estrogen regulated increase in the number of cells expressing immunoreactive CD4 and Ia, suggesting that the differential responsiveness to the effects of estradiol between the two strains of rats may be genetically controlled. Nevertheless, Cr:NIH-nu/nu rats, which are deficient in T-cells, possess virtually identical numbers of CD4 positive staining uterine cells as compared to their nu/+ littermate controls, indicating that the expression of immunoreactive CD4 is associated with a resident non-T-cell population. In addition, a message for rat CD4 was observed in Northern blots of uterine mRNA, suggesting that the immunoreactive CD4 expressed by uterine cells is probably a fully functional cell surface antigen/receptor rather than a truncated form which only expresses the antigenic determinant recognized by the W3/25 monoclonal antibody.
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1750
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Zheng Y, Zhu N, Zhan H, Wu X. Structure of 1,3-μ2-acetato-2-(acetonitrile)-μ3-sulfido-tris[(diethyl dithiophosphate-S,S')-μ2-sulfido-molybdenum(IV)](3 Mo–Mo). Acta Crystallogr C 1989. [DOI: 10.1107/s0108270189006839] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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