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Tong SY, Huang H, Wei CM. Method for spatially resolved imaging of energy-dependent photoelectron diffraction. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:2452-2459. [PMID: 10003920 DOI: 10.1103/physrevb.46.2452] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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1552
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Bouhnik J, Richoux JP, Huang H, Savoie F, Baussant T, Alhenc-Gelas F, Corvol P. Hypertension in Dahl salt-sensitive rats: biochemical and immunohistochemical studies. Clin Sci (Lond) 1992; 83:13-22. [PMID: 1325316 DOI: 10.1042/cs0830013] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
1. The renin-angiotensin and kinin-kallikrein systems of Dahl salt-sensitive and salt-resistant rats fed diets with different salt contents were analysed using biochemical and immunocytochemical techniques. 2. Blood pressure increased by 45% in salt-sensitive rats only, after 4 weeks on a high-salt diet. The plasma renin activity and plasma angiotensin II concentration remained at the same levels in salt-sensitive rats on the high-salt diet as on the normal salt diet, whereas the plasma renin activity and plasma angiotensin II concentration of salt-resistant rats fed the high-salt diet were lower. The plasma renin activity and the plasma angiotensin II concentration were elevated in both salt-resistant and salt-sensitive rats fed the salt-deficient diet but were much more elevated in salt-resistant than in salt-sensitive rats. 3. The kidney immunocytochemical data paralleled the data on plasma parameters. Salt-sensitive rats had fewer renin positive juxtaglomerular apparatuses than salt-resistant rats on the normal diet, and the increase on the sodium-deficient diet was also smaller in salt-sensitive rats. Salt-sensitive rats fed the high-salt diet and the standard diet had almost no angiotensin II immunoreactivity compared with the salt-resistant rats on the same diets. 4. The total renal kallikrein content of salt-sensitive rats was lower than that of salt-resistant rats on all three diets, as was the amount of kallikrein excreted in the urine on the standard and the high-salt diets. The differences resulted from a reduction in active kallikrein. The increase in kallikrein in salt-sensitive and salt-resistant rats on the salt-deficient diet was not significantly different. 5. There were similar changes in immunopositive kallikrein in the kidneys of salt-sensitive and salt-resistant rats with diet, with a large increase in kallikrein biosynthesis on the low-salt diet. The plasma concentration of high-molecular-mass kininogen was not significantly different in salt-sensitive and salt-resistant rats, but there was a significant increase in T-kininogen in salt-sensitive rats fed the high-salt diet. 6. In conclusion, the absence of decreases in the plasma renin activity and the plasma angiotensin II concentration in salt-sensitive rats fed the high-salt diet might partially explain the increase in blood pressure.
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1553
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Huang H, Meyer KC, Kubai L, Auerbach R. An immune model of beryllium-induced pulmonary granulomata in mice. Histopathology, immune reactivity, and flow-cytometric analysis of bronchoalveolar lavage-derived cells. J Transl Med 1992; 67:138-46. [PMID: 1625444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND Beryllium compounds can cause acute and chronic lung injury in humans. Although models of chronic granulomatous lung disease have been established in various animal species, a murine model of beryllium-induced chronic lung disease has not been established. EXPERIMENTAL DESIGN Beryllium was introduced intratracheally either as a soluble salt (BeSO4) or in particulate form (BeO). Various preimmunization protocols were used to enhance immune-mediated pulmonary changes. Cells obtained by bronchoalveolar lavage (BAL) were analyzed using flow cytometry, and the observations correlated with in vitro immune responses and with lung histopathology. RESULTS Histologic changes were consistently found in mice preimmunized with BeSO4.4H2O plus syngeneic serum. Addition of complete or incomplete Freund's adjuvant to the preimmunization protocol was not necessary to induce granulomatous changes. BAL showed a significant increase in lymphocytes at 2, 4, and 8 weeks after intratracheal BeSO4. Approximately one-third of BAL lymphocytes expressed the gamma/delta T lymphocyte receptor at 2 weeks; at 4 weeks the lymphocytes were predominantly Thy1+, L3T4+ (CD4+) and expressed only the alpha/beta T lymphocyte receptor. Only BAL lymphocytes from mice preimmunized with BeSO4/serum and challenged with BeSO4/serum showed significant in vitro proliferation in response to BeSO4. Macrophage activation antigens (Mac-2, Mac-3) were expressed only during the acute inflammatory phase (2 weeks) whereas increased expression of a monocyte/macrophage antigen (Mac-1) remained elevated beyond the inflammatory period in some instances. Attempts to induce similar lesions in BALB/c and C57BL6/J mice were unsuccessful. Genetic differences at the H-2 major histocompatibility complex gene complex may account for the differential responses to BeSO4 among various mouse strains. A single exposure to BeO also induced histopathologic changes in the lung which correlated with BAL cellularity, but these changes were only observed 8 months after exposure and did not proceed to frank granulomas. CONCLUSIONS A murine model of granulomatous lung disease may prove useful in understanding the genetic and immunologic factors that determine the response to beryllium. The animal model may also have implications for pulmonary sarcoidosis, a disease of unknown cause(s), whose disease manifestations and BAL profiles are difficult to distinguish clinically and pathologically from chronic beryllium disease.
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1554
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Watt GD, Frankel RB, Jacobs D, Huang H, Papaefthymiou GC. Fe2+ and phosphate interactions in bacterial ferritin from Azotobacter vinelandii. Biochemistry 1992; 31:5672-9. [PMID: 1610815 DOI: 10.1021/bi00139a035] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Fe2+ binding to both apo- and holo- bacterial ferritin from Azotobacter vinelandii (AVBF) was measured as a function of pH under carefully controlled anaerobic conditions. Fe2+ binding to apo-AVBF is strongly pH dependent with 25 Fe2+ ions/apo-AVBF binding tightly at pH 5.5 and over 150 Fe2+/apo-AVBF at pH 9.0. Holo-AVBF gave a similar pH-dependent binding profile with over 400 Fe2+/AVBF binding at pH of 9.0. Proton release per Fe2+ bound to either AVBF protein increases with increasing pH until a total of about two protons are released at pH 9.0. These binding results are both qualitatively and quantitatively different from corresponding measurements (Jacobs et al., 1989) on apo- and holo- mammalian ferritin (MF) where less Fe2+ binds in both cases. The high level of Fe2+ binding to holo-AVBF relative to that of mammalian ferritin is a consequence of the higher phosphate content in the core of AVBF. Reduction of AVBF by either dithionite or methyl viologen in the absence of chelating agents demonstrated that phosphate, but not Fe2+, is released from the AVBF core in amounts commensurate with the degree of iron reduction, although even at 100% reduction considerable phosphate remains associated with the reduced mineral core. Fe2+ binding to holo-AVBF made deficient in phosphate was lower than that of native AVBF, while the addition of phosphate to native holo-AVBF increased the Fe2+ binding capacity. These results clearly support the role of phosphate as the site of interaction of Fe2+ with the AVBF mineral core.(ABSTRACT TRUNCATED AT 250 WORDS)
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Huang H, Mercier P. Asymptomatic impacted teeth in edentulous jaws undergoing preprosthetic surgery. A long-term evaluation. Int J Oral Maxillofac Surg 1992; 21:147-9. [PMID: 1640126 DOI: 10.1016/s0901-5027(05)80782-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A long-term evaluation is made of 15 patients with asymptomatic impacted teeth in edentulous jaws. Seventeen impacted teeth in 15 patients were recorded and analysed. They were located in denture-bearing areas and in areas undergoing preprosthetic surgery. All patients, except one lost after 1-year period, were followed clinically and radiographically for 1 to 10 years with an average of 4 years. The asymptomatic impacted teeth in edentulous jaws embedded in bone or covered with mucosa did not cause any problem to the patients. The findings of this study support the view that removal of asymptomatic impacted teeth in denture-bearing areas, or in areas undergoing preprosthetic surgery, is unnecessary as long as the integrity of the covering tissues is preserved. A policy or radiological surveillance is recommended.
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Li T, Liu Z, Huang H, Jin S, Lu S. A study on optimum load for physical work. JOURNAL OF HUMAN ERGOLOGY 1992; 21:3-11. [PMID: 1491169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Five healthy men were chosen as experimental subjects and were divided into groups at random. The subjects walked with a load in a shoulder-waist-back manner on the treadmill at the speed of 5, 7 and 9 km h-1. The parameters measured were as follows: oxygen expenditure, energy consumption, heart rate and self appraisal. Based on the experimental results and analysis of multiple regression, the authors suggested that physical loading should not exceed 25 kg (i.e. roughly equal to 39% of average body weight of male Chinese), when the walking speed was at 5 km h-1. The suitable loading at physical work would be 20 kg (i.e. equal to 31% of the average body weight of male Chinese).
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1557
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Gerry CC, Huang H. Dynamics of a two-atom Raman coupled model interacting with two quantized cavity fields. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1992; 45:8037-8044. [PMID: 9906898 DOI: 10.1103/physreva.45.8037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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1558
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Huang H, Liang S. Acupuncture at otoacupoint heart for treatment of vascular hypertension. J TRADIT CHIN MED 1992; 12:133-6. [PMID: 1495338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The immediate, short-term and long-term depressor effects, the immediate effects on cardiac functions in grade II and grade III vascular hypertension, and the effects on angiotensin II in grade III vascular hypertension by acupuncture at otoacupoint Heart were studied in 30 cases of vascular hypertensive patients. The immediate depressor effect of acupuncture at otoacupoint Stomach was also recorded for comparison. It was found that acupuncture at otoacupoint Heart produced marked immediate depressor effect, and the short-term effective rate was 100%, the long-term effective rate was 63.3%, as well as evident immediate effects on cardiac functional activities in grade II and grade III hypertension and marked effects on angiotensin II in grade III hypertension. Acupuncture at otoacupoint Stomach produced no depressor effect on vascular hypertension.
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Lin Y, Seka W, Eberly JH, Huang H, Brown DL. Experimental investigation of Bessel beam characteristics. APPLIED OPTICS 1992; 31:2708-13. [PMID: 20725197 DOI: 10.1364/ao.31.002708] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We report on an experimental characterization of Bessel beams with finite apertures. We show that real Bessel beams can be generated with intensity profiles that closely resemble the ideal J(0)(2) transverseintensity distribution of Bessel beams. We also show interferometrically that these beams have planar phase fronts with pi-phase shifts from one Bessel ring to the next. We report tolerance conditions for Bessel beam generation and give an example of this generation that uses an unstable resonator as the light source.
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Piper RC, Tai C, Slot JW, Hahn CS, Rice CM, Huang H, James DE. The efficient intracellular sequestration of the insulin-regulatable glucose transporter (GLUT-4) is conferred by the NH2 terminus. J Cell Biol 1992; 117:729-43. [PMID: 1577853 PMCID: PMC2289457 DOI: 10.1083/jcb.117.4.729] [Citation(s) in RCA: 98] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
GLUT-4 is the major facilitative glucose transporter isoform in tissues that exhibit insulin-stimulated glucose transport. Insulin regulates glucose transport by the rapid translocation of GLUT-4 from an intracellular compartment to the plasma membrane. A critical feature of this process is the efficient exclusion of GLUT-4 from the plasma membrane in the absence of insulin. To identify the amino acid domains of GLUT-4 which confer intracellular sequestration, we analyzed the subcellular distribution of chimeric glucose transporters comprised of GLUT-4 and a homologous isoform, GLUT-1, which is found predominantly at the cell surface. These chimeric transporters were transiently expressed in CHO cells using a double subgenomic recombinant Sindbis virus vector. We have found that wild-type GLUT-4 is targeted to an intracellular compartment in CHO cells which is morphologically similar to that observed in adipocytes and muscle cells. Sindbis virus-produced GLUT-1 was predominantly expressed at the cell surface. Substitution of the GLUT-4 amino-terminal region with that of GLUT-1 abolished the efficient intracellular sequestration of GLUT-4. Conversely, substitution of the NH2 terminus of GLUT-1 with that of GLUT-4 resulted in marked intracellular sequestration of GLUT-1. These data indicate that the NH2-terminus of GLUT-4 is both necessary and sufficient for intracellular sequestration.
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Mercier P, Huang H, Cholewa J, Djokovic S. A comparative study of the efficacy and morbidity of five techniques for ridge augmentation of the mandible. J Oral Maxillofac Surg 1992; 50:210-7. [PMID: 1311757 DOI: 10.1016/0278-2391(92)90314-p] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Severely atrophic mandibles were augmented in 254 patients using five different surgical procedures, followed by total lowering of the floor of the mouth, vestibuloplasty, and skin graft. Patients were evaluated on a long-term basis to compare efficacy of treatment subjectively by recording patient complaints and by objectively assessing ridge form clinically and radiographically. Patients, in general, were pleased with the short- and long-term results of all five procedures. The ideal ridge form, comma-shaped, was obtained at a much higher rate with the three procedures using hydroxylapatite (HA) alone or in combination with collagen (HA-PFC). Ridge height loss both anteriorly and posteriorly was more severe in the two visor groups with bone graft or with HA than in those with only the alloplast. Labial sensory alterations more frequently occurred in the visor bone graft group, and wound dehiscence and lack of skin graft take were seen most often in the HA-PFC groups. Despite great differences in the quality of ridges obtained and in the number of complications between the visor groups and the alloplast groups, general patient satisfaction with any of the five procedures could be explained by the severity of the original complaints and because muscle interference has been eliminated in all cases by lowering of the floor of the mouth.
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Olsen KW, Zhang QY, Huang H, Sabaliauskas GK, Yang T. Stabilities and properties of multilinked hemoglobins. BIOMATERIALS, ARTIFICIAL CELLS, AND IMMOBILIZATION BIOTECHNOLOGY : OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY FOR ARTIFICIAL CELLS AND IMMOBILIZATION BIOTECHNOLOGY 1992; 20:283-5. [PMID: 1391443 DOI: 10.3109/10731199209119644] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Crosslinking of both human and dog hemoglobin has been done with a variety of reagents to produce singly, doubly and multiply crosslinked hemoglobins. Succinate and glutarate diaspirins did not crosslink deoxy human hemoglobin in good yield, in contrast to the fumarate analog (DBSF). Deoxy dog Hb did not react well with DBSF, but oxy dog Hb did react, giving crosslinked tetramers as well as dimers on SDS electrophoresis. Crosslinking with a short, rigid reagent (difluorodinitrobenzene) resulted in a similar product for both oxy and deoxy hemoglobin that had high stability and oxygen affinity. The trilinker, tris-chloroethylamine, produced a more stable product than the corresponding crosslinker, bis-chloroethylamine. Double crosslinking oxy Hb with DBSF and dimethylpimelimidate or with DBSF followed by deoxygenation and recrosslinking with DBSF gave products with higher denaturation temperatures. The diaspirin double crosslinked product had high oxygen affinity.
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Pleus RC, Shiue CY, Shiue GG, Rysavy JA, Huang H, Cornish KG, Sunderland JJ, Bylund DB. Synthesis and biodistribution of the alpha 2-adrenergic receptor antagonist (11C)WY26703. Use as a radioligand for positron emission tomography. RECEPTOR 1992; 2:241-52. [PMID: 1363726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/25/2023]
Abstract
The purpose of these experiments was to label an alpha 2-adrenergic receptor ligand with a positron emitting isotope and then test this radioligand in vivo. No-carrier-added [11C]WY26703 was synthesized by methylation of its desmethyl precursor, WY27050 with [11C]H3I followed by purification with HPLC in 14% yield in a synthesis time of 35 min from EOB. Ki values for unlabeled WY26703, ranged from 0.52-1.55 nM in tissues that express a single alpha 2-adrenergic receptor subtype. Tail vein injections of [11C]WY26703 in mice revealed that the compound was distributed in the brain, heart, lungs, spleen, and kidneys. In the brains of rats treated with atipamezole, an alpha 2-adrenergic receptor antagonist, there was no decrease in [11C] accumulation indicating a lack of observable specific binding of the radioligand. When brain tissue was homogenized and filtered, however, atipamezole decreased [11C] activity by 53%. Therefore, [11C]WY26703 crosses the blood-brain barrier and specifically binds to alpha 2-adrenergic receptors with high affinity. Atipamezole treatment decreased only the area of the locus coeruleus [11C] value of the various regions of the brain. The affinity, however, of [11C]WY26703 does not appear to distinguish alpha 2-receptors from nonspecific binding sites. PET study of [11C]WY26703 in a Rhesus monkey showed that influx of [11C]WY26703 into the brain was high for the first few minutes but radioactivity then declined rapidly and did not retain in a specific brain region. This suggests that [11C]WY26703 may not be a useful ligand for imaging human alpha 2-adrenergic receptors by positron emission tomography.
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Huang H, Huang CF, Huang JS, Wang TC, Jan KY. The transition from late G1 to early S phase is most vulnerable to the coclastogenic effect of ultraviolet radiation plus arsenite. Int J Radiat Biol 1992; 61:57-62. [PMID: 1345932 DOI: 10.1080/09553009214550621] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
It has previously been reported that chromosome aberrations induced by ultraviolet (UV) radiation can be enhanced by treatment with sodium arsenite for 24 h post-irradiation. Using synchronized CHO-K1 cells, it has now been established that cells in the transitional stage from late G1 to early S phase are most vulnerable to the coclastogenic effect of treatment with UV radiation and arsenite. This result cannot be explained by the special vulnerability of cells in the late G1 to early S transition to UV clastogenicity, as the coclastogenic effects of UV and caffeine or UV and arabinofuranosylcytosine were detected when treating the mid-S but not late-G1 or G2 phase cells.
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Jin Y, Meng H, Huang H. Unstable tibio-fibular fractures treated with an external fixator--a clinical report of 1033 cases. CHINESE MEDICAL SCIENCES JOURNAL = CHUNG-KUO I HSUEH K'O HSUEH TSA CHIH 1991; 6:223-5. [PMID: 1813059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
From 1977 to 1987, 1033 cases of unstable tibio-fibular fractures were treated with an external fixator designed by the authors. Among them, 232 involved open fractures. All of the patients were followed up for 4 to 90 months (average 20 months). The duration of bed confinement averaged 8.3 days, and the mean time necessary for clinical bone union was 54 days. Anatomical or nearly anatomical bone apposition was effected in 878 cases (85.0%), functional apposition in 141 cases (13.6%) and malunion in 14 cases (1.4%). The overall functional results were as follows: excellent in 769 cases (74.4%), good in 218 cases (21.1%), fair in 32 cases (3.1%), and poor in 14 cases (1.4%). The design of the device and its indications are also discussed.
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Meggs LG, Huang H, Li P, Capasso JM, Anversa P. Chronic nonocclusive coronary artery constriction in rats. Beta-adrenoceptor signal transduction and ventricular failure. J Clin Invest 1991; 88:1940-6. [PMID: 1661293 PMCID: PMC295773 DOI: 10.1172/jci115518] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
To determine the effects of chronic coronary artery constriction on the relationship between cardiac function and regulation of beta-adrenoceptor signal transduction, the left main coronary artery was narrowed in rats and the animals were killed 5 mo later. An average reduction in coronary luminal diameter of 44% was obtained and this change resulted in an increase in left ventricular end-diastolic pressure and a decrease in positive and negative dP/dt. Significant increases in left and right ventricular weights indicative of global cardiac hypertrophy were observed. Radioligand binding studies of beta-adrenoreceptors, agonist-stimulated adenylate cyclase activity, and ADP ribosylation of 45-kD substrate by cholera toxin were all depressed in the failing left ventricle. In contrast, in the hypertrophic non-failing right ventricle, beta-adrenoreceptor density was preserved and receptor antagonist affinity was increased. In spite of these findings at the receptor level, agonist stimulated cyclic AMP generation was reduced in the right ventricular myocardium. The quantity of the 45-kD substrate was also decreased. In conclusion, longterm nonocclusive coronary artery stenosis of moderate degree has profound detrimental effects on the contractile performance of the heart in association with marked attenuation of adrenergic support mechanisms.
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Tong SY, Li H, Huang H. Energy extension in three-dimensional atomic imaging by electron emission holography. PHYSICAL REVIEW LETTERS 1991; 67:3102-3105. [PMID: 10044641 DOI: 10.1103/physrevlett.67.3102] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Ma H, Yanofsky MF, Huang H. Isolation and sequence analysis of TGA1 cDNAs encoding a tomato G protein alpha subunit. Gene 1991; 107:189-95. [PMID: 1748292 DOI: 10.1016/0378-1119(91)90318-6] [Citation(s) in RCA: 79] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We have isolated cDNAs for a gene coding for a G protein alpha subunit from tomato (Lycopersicon esculentum, cv. VF36). This gene, named TGA1, was isolated using a cDNA of the Arabidopsis thaliana G protein alpha subunit-encoding gene, GPA1, as a DNA probe. The sequences of four cDNA clones indicate that the deduced amino acid (aa) sequence of the gene product (TG alpha 1) has 384 aa (44906 Da). The predicted TG alpha 1 protein exhibits similarity to all known G protein alpha subunits. The aa are 84.6% identical and 93% similar (identical and conservative changes) to A. thaliana GP alpha 1, and 34% identical and 59% similar to mammalian transducins. Furthermore, it has all of the consensus regions for a GTP-binding protein. Finally, hybridizations of tomato genomic DNA indicate that TGA1 is a single-copy gene.
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Zeng ZY, Gupta SL, Huang H, Yeager EB. Oxygen reduction on poly(4-vinylpyridine)-modified ordinary pyrolytic graphite electrodes with adsorbed cobalt tetra-sulphonated phthalocyanine in acid solutions. J APPL ELECTROCHEM 1991. [DOI: 10.1007/bf01077582] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Harding J, Huang H, Byrne T. Maternal, paternal, additive, and dominance components of variance in Gerbera. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 1991; 82:756-760. [PMID: 24213451 DOI: 10.1007/bf00227321] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/1990] [Accepted: 04/18/1991] [Indexed: 06/02/2023]
Abstract
Estimates of additive, dominance, maternal, and paternal components of variance were obtained for a sample of 18 traits, including measurements of yield, scapes, flowers, disk, ray and trans florets, leaves, and branching in the Davis population of Gerbera hybrida. The results, based on the covariance of reciprocals, indicate that although heritability averaged 0.52, extranuclear maternal or paternal effects are not important sources of variability. Therefore, reciprocal differences do not seriously affect estimates of additive variance or heritability in this population.
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Adamovich MI, Aggarwal MM, Alexandrov YA, Andreeva NP, Anson ZV, Arora R, Badyal SK, Basova ES, Bhalla KB, Bhasin A, Bhatia VS, Bogdanov VG, Bubnov VI, Burnett TH, Cai X, Chasnikov IY, Chernova LP, Chernyavski MM, Eligbaeva GZ, Eremenko LE, Gaitinov AS, Ganssauge ER, Garpman S, Gerassimov SG, Grote J, Gulamov KG, Gupta SK, Heckman HH, Huang H, Jakobsson B, Judek B, Kachroo S, Kadyrov FG, Kalyachina GS, Kanygina EK, Karlsson L, Kaul GL, Kharlamov SP, Koss T, Kumar V, Lal P, Larionova VG, Lepetan VN, Liu LS, Lokanathan S, Lord J, Lukicheva S, Luo SB, Mangotra LK, Maslennikova NV, Mittra IS, Mokerjee S, Monnand E, Nasrullaeva H, Nasyrov SH, Navotny VS, Orlova GI, Otterlund I, Palsania HS, Peresadko NG, Petrov NV, Plyushchev VA, Qian WY, Raniwala R. Multiplicities in 16O-induced violent heavy-ion collisions from 5A to 2 x 10(5)A MeV. PHYSICAL REVIEW LETTERS 1991; 67:1201-1205. [PMID: 10044086 DOI: 10.1103/physrevlett.67.1201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Shang F, Huang H, Revesz K, Chen HC, Herz R, Pinter A. Characterization of monoclonal antibodies against the human immunodeficiency virus matrix protein, p17gag: identification of epitopes exposed at the surfaces of infected cells. J Virol 1991; 65:4798-804. [PMID: 1714518 PMCID: PMC248937 DOI: 10.1128/jvi.65.9.4798-4804.1991] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Eight monoclonal antibodies reactive with the matrix protein of human immunodeficiency virus type 1 (HIV-1), p17gag, were isolated from rats which had been immunized with solubilized HIV-1 lysate. The epitope specificities of these antibodies were determined with a series of synthetic peptides representing overlapping regions of p17. Six of the antibodies were mapped to three distinct regions of p17, while two antibodies (G11g1 and G11h3) reacted only with intact recombinant p17, suggesting that they were directed against conformational or discontinuous epitopes. All the antibodies bound to HIV-infected cells which had been permeabilized with acetone, but only G11g1 and G11h3 reacted with live HIV-infected cells. Specificity studies with diverse virus strains demonstrated that these two antibodies recognized distinct epitopes, one which was group specific for HIV-1, and one which was shared with HIV type 2 and simian immunodeficiency virus. Binding competition studies indicated that these epitopes were proximal in native p17. Despite their reactivity with intact cells, these two antibodies did not possess appreciable virus-neutralizing activity. These results indicate that a form of p17 is expressed on the surfaces of live HIV-infected cells which is accessible to some, but not all, antibodies against p17. These cell surface molecules may play a role in the generation of antibodies against p17gag that are characteristic of early stages of HIV infection, and they may act as natural targets for the immune system and as potential targets for immunotherapy of HIV-infected cells.
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1573
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Huang H, Li H, Tong SY. Three-dimensional imaging of atoms using source waves from deeply buried atoms and overcoming multiple-scattering effects. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 44:3240-3245. [PMID: 9999921 DOI: 10.1103/physrevb.44.3240] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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1574
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Huang H, Liu L, Wang Z. Cyclic matrix representation for sequential multiplication of complex matrices. APPLIED OPTICS 1991; 30:3275-3277. [PMID: 20706387 DOI: 10.1364/ao.30.003275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A cyclic matrix representation for complex numbers is proposed for sequential multiplication of complex matrices. The related optical implementation is discussed.
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1575
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Cobrinik D, Aiyar A, Ge Z, Katzman M, Huang H, Leis J. Overlapping retrovirus U5 sequence elements are required for efficient integration and initiation of reverse transcription. J Virol 1991; 65:3864-72. [PMID: 1710292 PMCID: PMC241417 DOI: 10.1128/jvi.65.7.3864-3872.1991] [Citation(s) in RCA: 82] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
A secondary structure in the 5' noncoding region of avian retrovirus RNA, called the U5-leader stem, was shown previously to have a role in initiation of reverse transcription (D. Cobrinik, L. Soskey, and J. Leis, J. Virol. 62:3622-3630, 1988). We now show that an additional RNA secondary structure near the U5 terminus, called the U5-IR stem, is also important for reverse transcription. Mutations that disrupt the U5-IR stem cause a replication defect associated with both a decrease in synthesis of viral DNA in infected cells and a decrease in initiation of reverse transcription in melittin-permeabilized virions. Structure-compensating base substitutions in the U5-IR restore reverse transcription efficiency. In viral DNA, U5-IR sequences are included in the U5 terminal region that functions as a viral integration donor site. When base substitutions are introduced into these sequences, a reduced efficiency of integration in vitro and in vivo is observed. These observations indicate that U5-IR sequences have a structural role in reverse transcription of viral RNA and a sequence-specific role in the integration of viral DNA.
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1576
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Zhang B, Chen X, Huang H. Observation on long-term therapeutic effect in nasopharyngeal carcinoma patients with cyanosis of the tongue after radiotherapy. J TRADIT CHIN MED 1991; 11:53-6. [PMID: 1861512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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1577
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Tong SY, Wei CM, Zhao TC, Huang H, Li H. Phase-shift correction in three-dimensional imaging using foward-scattering photoemission and Auger spectoscopies. PHYSICAL REVIEW LETTERS 1991; 66:60-63. [PMID: 10043142 DOI: 10.1103/physrevlett.66.60] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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1578
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Gupta S, Huang H, Yeager E. Studies of the adsorption of tetrasulfonated phthalocyanines on graphite substrate. Electrochim Acta 1991. [DOI: 10.1016/0013-4686(91)85225-v] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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1579
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Wei CM, Huang H, Tong SY, Glander GS, Webb MB. Adsorption geometry of (2 x 1) Na on Si(001). PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 42:11284-11287. [PMID: 9995415 DOI: 10.1103/physrevb.42.11284] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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1580
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Keeler WJ, Huang H, Dubowski JJ. Multiphonon resonant Raman scattering in high-manganese-concentration Cd1-xMnxTe films. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 42:11355-11358. [PMID: 9995427 DOI: 10.1103/physrevb.42.11355] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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1581
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Meggs LG, Tillotson J, Huang H, Sonnenblick EH, Capasso JM, Anversa P. Noncoordinate regulation of alpha-1 adrenoreceptor coupling and reexpression of alpha skeletal actin in myocardial infarction-induced left ventricular failure in rats. J Clin Invest 1990; 86:1451-8. [PMID: 2173720 PMCID: PMC296889 DOI: 10.1172/jci114861] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
To determine the effects of myocardial infarction-induced left ventricular failure on the regulation of surface alpha-1 adrenoreceptors and signal transduction, large infarcts were produced in rats and the animals killed seven days later. After the documentation of impaired left ventricular pump performance, radioligand binding studies of the alpha-1 adrenoreceptor, norepinephrine-stimulated phosphoinositol turnover, and ADP ribosylation of 41 kD substrate by pertussis toxin were examined in the hypertrophying unaffected myocardium. Moreover, the expression of sarcomeric actin isoforms was analyzed by Northern blots and hybridization with specific oligonucleotide probes. Alpha-1 adrenoreceptor density was found not to be altered in membranes obtained from the spared left ventricular tissue, whereas phosphoinositol turnover was increased 3.1-fold in the viable myocytes of infarcted hearts. Furthermore, pertussis toxin substrate was augmented 2.5-fold in membranes prepared from the surviving left ventricular myocardium. Finally, an upregulation of the skeletal actin isoform was detected in the tissue of the failing left ventricle. In conclusion, the possibility is raised that in the presence of severe myocardial dysfunction and ongoing reactive hypertrophy, effector pathways linked to the alpha-1 adrenoreceptor may stimulate the myocyte hypertrophic response which would tend to normalize cardiac hemodynamics. The reexpression of alpha skeletal actin may be a molecular indicator of the persistance of an overload on the myocardium.
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1582
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Nikolic B, Huang H, Gervasio D, Lin A, Fierro C, Adzic R, Yeager E. Electroreduction of carbon dioxide on platinum single crystal electrodes: electrochemical and in situ FTIR studies. ACTA ACUST UNITED AC 1990. [DOI: 10.1016/0022-0728(90)85033-2] [Citation(s) in RCA: 63] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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1583
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Huang H, Tong SY, Yang WS, Shih HD, Jona F. Atomic structure of Si(111)-( sqrt 3 x sqrt 3 )R30 degrees-Al studied by dynamical low-energy electron diffraction. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 42:7483-7486. [PMID: 9994893 DOI: 10.1103/physrevb.42.7483] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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1584
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Wang B, Brennan AB, Huang H, Wilkes GL. Synthesis and Characterization of New Alumina and Titania-Containing Hybrid Network Ceramer Materials from Sol-Gel Processing. ACTA ACUST UNITED AC 1990. [DOI: 10.1080/00222339009349705] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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1585
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Huang H, Liu L, Wang Z. Parallel multiple matrix multiplication using an orthogonal shadow-casting and imaging system. OPTICS LETTERS 1990; 15:1085-1087. [PMID: 19771005 DOI: 10.1364/ol.15.001085] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A novel orthogonal shadow-casting and imaging optical system is proposed for performing multiple matrix multiplication. An analysis is given for describing the construction of a matrix processor. Preliminary experiments of matrix multiplication are demonstrated.
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1586
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Harding J, Huang H, Byrne T, Huang N. Quantitative analysis of correlations among flower traits in Gerbera hybrida Compositae : 1. Genetic and environmental correlations. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 1990; 80:552-558. [PMID: 24221016 DOI: 10.1007/bf00226759] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/1989] [Accepted: 03/23/1990] [Indexed: 06/02/2023]
Abstract
Phenotypic (r p ), genetic (r g ), and environmental, (r e ) correlations were estimated for 38 flower traits in the Davis population of gerbera (Gerbera hybrida, Compositae). Fifty-two percent of r p and 38% of r g were statistically significant at P < 0.05. Significant negative r p were infrequent, but significant negative r g occurred in 10% of cases. There was a negative correlation between estimates of r g and r e , resulting in cases where r g was significant, but r p was not. Individual traits varied in their tendency to correlate phenotypically or genetically, and positively or negatively, with other traits. Traits within the same morphological category, such as disk florets or transitional florets, were more highly intercorrelated than were traits from different categories.
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1587
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Lee SC, Hsiang CC, Huang H, Ting G. A Comparative Study of Gel-Type and Macroreticular Cation Exchange Resins for the Separation of Rare Earth Elements. SEP SCI TECHNOL 1990. [DOI: 10.1080/01496399008050429] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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1588
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Huang H, Zhao M, Xing X, Bae I, Scherson D. In-situ infrared studies of the Cd-UPD mediated reduction of nitrate on gold. ACTA ACUST UNITED AC 1990. [DOI: 10.1016/0022-0728(90)80071-d] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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1589
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Huang H, Harding J, Byrne T, Huang N. Quantitative analysis of correlations among flower traits in Gerbera hybrida, Compositae : 2. Direct and mean correlated response to selection. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 1990; 80:559-563. [PMID: 24221017 DOI: 10.1007/bf00226760] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/1989] [Accepted: 03/23/1990] [Indexed: 06/02/2023]
Abstract
A Mean Correlation Response (MCR) model was developed to estimate the relative effectiveness of direct selection when other traits also respond to the selection. A measure of the relative effects of mean correlated response and direct response (R) and a measure of the relative efficiency of direct selection (IE) were applied to a genetic correlation matrix of 38 traits. These were measurements of inflorescence, receptacle and involucre, scape, disk florets, ray florets, and trans florets in the Davis population of Gerbera hybrida, Compositae. Generally, traits with high heritability had high direct and mean correlated response; these were often traits measuring disk and trans florets. Traits with low heritability had low direct and mean correlated response; these were often traits measuring the inflorescence. Traits of the inflorescence had the lowest efficiency of direct to mean correlated response.
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1590
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Huang H, Wei CM, Tonner BP, Tong SY. Huang et al. reply. PHYSICAL REVIEW LETTERS 1990; 64:1183. [PMID: 10041324 DOI: 10.1103/physrevlett.64.1183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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1591
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Huang H, Tong SY, Quinn J, Jona F. Atomic structure of Si(111) ( sqrt 3-bar x sqrt 3-bar)R30 degrees-B by dynamical low-energy electron diffraction. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 41:3276-3279. [PMID: 9994116 DOI: 10.1103/physrevb.41.3276] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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1592
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1593
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Wang B, Brennan AB, Huang H, Wilkes GL. Synthesis and Characterization of New Alumina and Titania-Containing Hybrid Network Ceramer Materials from Sol-Gel Processing. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 1990. [DOI: 10.1080/10601329008544852] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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1594
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Isaacs E, Huang H, Babchin A, Chow R. Electroacoustic method for monitoring the coalescence of water-in-oil emulsions. ACTA ACUST UNITED AC 1990. [DOI: 10.1016/0166-6622(90)80164-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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1595
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Reade R, Michel JB, Carelli C, Huang H, Baussant T, Corvol P. [Immunisation of spontaneously hypertensive rats against angiotensin I]. ARCHIVES DES MALADIES DU COEUR ET DES VAISSEAUX 1989; 82:1323-8. [PMID: 2510667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Immunization against angiotensin I has been considered in comparison with the immunization against renin, in the spontaneously hypertensive rat (SHR). Among 6 different methods of immunization, two (AI-gluta-LPH and AI-Carbo-LPH coupling) permitted to obtain high levels of antibodies against angiotensin I (higher than 1/10,000), after four injections of 50 micrograms AI at three weeks interval. The titration of the antibodies was realized in radio-immuno-assay (RIA), with the determination of the cross-reactivity with AII by the same method. Characterization of the isotypes and the affinity calculation were realized with the ELISA method. The average level of antibodies is about 1/10,000 to 1/100,000, and the cross reactivity of the antibodies for AII is about 0.1 p. 100 in RIA. In ELISA, the study of the different isotypes shows a good maturation of the immune system with a sharp elevation of the IgG1 and IgG2 alpha isotypes, after 2 or 3 injections. The affinity of the antibodies purified by affinity chromatography is about 10.3 10(-9) M. The weekly measure of the arterial pressure during 6 months does not reveal at any moment a fall of pressure during the immunizations. The average pressure of the immunized group (209.4 +/- 23.8 mmHg, n = 40) is non significantly different from the average pressure of the mock group (208.5 +/- 22.6 mmHg, n = 10).
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1596
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Lee TC, Wei ML, Chang WJ, Ho IC, Lo JF, Jan KY, Huang H. Elevation of glutathione levels and glutathione S-transferase activity in arsenic-resistant Chinese hamster ovary cells. IN VITRO CELLULAR & DEVELOPMENTAL BIOLOGY : JOURNAL OF THE TISSUE CULTURE ASSOCIATION 1989; 25:442-8. [PMID: 2732199 DOI: 10.1007/bf02624629] [Citation(s) in RCA: 86] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Arsenic-resistant Chinese hamster ovary (CHO) cells were established by progressively increasing the concentration of sodium arsenite in culture medium. One of the resistant clones, SA7, was also cross-resistant to As(V), Zn, Fe(II), Co, and Hg. The susceptibilities to sodium arsenite in parental CHO cells, revertant SA7N cells, and resistant SA7 cells were correlated with their intracellular glutathione (GSH) levels and glutathione S-transferase (GST) activity. The resistance in SA7 cells was diminished by depletion of GSH in cells after treatment with buthionine sulfoximine. Furthermore, after reexposure of revertant SA7N cells to sodium arsenite, the intracellular GSH levels, GST activity, and resistance to sodium arsenite were raised to the same levels as SA7 cells. These data indicate that the elevation of intracellular GSH levels and GST activity in SA7 cells may be responsible for the resistance to arsenite. A p25 protein, which could be a monomer subunit of GST, accumulated in SA7 cells. In addition, an outward transport inhibitor, verapamil, indiscriminately increased the arsenite toxicity in resistant and parental cells.
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1597
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Hubbard K, Huang H, Laspia MF, Ide H, Erlanger BF, Wallace SS. Immunochemical quantitation of thymine glycol in oxidized and X-irradiated DNA. Radiat Res 1989; 118:257-68. [PMID: 2524860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The present study demonstrates the usefulness of immunochemical assays for quantitating modified bases in oxidized and X-irradiated DNA. Escherichia coli, phi X174 RF I, PM2, and M13 DNA containing thymine glycols introduced by OsO4 oxidation were used as antigens in a direct enzyme-linked immunosorbent assay (ELISA). The number of thymine glycols per DNA molecule was determined by reactivity with antithymine glycol antibody standardized either to the acetol fragment assay or to the number of Escherichia coli endonuclease III-sensitive sites. The number of thymine glycols was also determined in phi X174 RF I DNA X-irradiated in either phosphate or Tris buffer under air. Using a direct ELISA with phi X174 RF I DNA irradiated in a phosphate buffer solution, the anti-thymine glycol antibody detected damage at the level of 40 Gy. The immunochemical assay was sensitive, specific, quantitative, and independent of DNA structure.
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1598
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Li ZZ, Zhang MC, Wus YG, Zhong BL, Lin GY, Huang H. Trial of deltamethrin impregnated bed nets for the control of malaria transmitted by Anopheles sinensis and Anopheles anthropophagus. Am J Trop Med Hyg 1989; 40:356-9. [PMID: 2712195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
In 1985-1987, a field trial of malaria control using deltamethrin impregnated mosquito nets was carried out with 4,450 people in the Buji district, Bao'an County, Guangdong Province, China. The vectors were exophilic Anopheles sinensis (80%) and the endophilic and anthropophilic An. anthropophagus (20%). The first impregnation of the nets was in June 1985 and the second in April 1986. About 87% of the population slept under treated nets. The indoor vector density decreased by 93% and remained at the same level during the second year. During the second year the average monthly malaria incidence was 1.3% for January-June, a decrease of 74.6% as compared with pretreatment data, and 0.85% from July to December, a decrease of 92.7%. In April 1986 and April 1987, the treatment was extended to the whole Buji District, which has a total population of approximately 40,000. The average monthly malaria incidence (April-December 1986 and 1987) was 0.54% and 0.17%, a decrease of 64.7% and 89% respectively as compared with the same period for the previous year.
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1599
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Fan WC, Ignatiev A, Huang H, Tong SY. Observation and structural determination of ( sqrt 3 x sqrt 3)R30 degrees reconstruction of the Si(111) surface. PHYSICAL REVIEW LETTERS 1989; 62:1516-1519. [PMID: 10039694 DOI: 10.1103/physrevlett.62.1516] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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1600
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Huang H, Wei CM, Li H, Tonner BP, Tong SY. Quantitative structural determination of metallic film growth on a semiconductor crystal: ( sqrt 3-bar x sqrt 3-bar)R 30 degrees -->(1 x 1) Pb on Ge (111). PHYSICAL REVIEW LETTERS 1989; 62:559-562. [PMID: 10040266 DOI: 10.1103/physrevlett.62.559] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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