1376
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Schaffer JP, Park H, Lind JH, Jones PL. Hydrogenated Amorphous Boron: Transient and Steady State Photoconductivity. ACTA ACUST UNITED AC 1984. [DOI: 10.1002/pssa.2210810159] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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1377
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Park H, Zeiger AR, Schumacher HR. Detection of soluble peptidoglycan in urine after penicillin administration. Infect Immun 1984; 43:139-42. [PMID: 6690400 PMCID: PMC263400 DOI: 10.1128/iai.43.1.139-142.1984] [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: 01/21/2023] Open
Abstract
A unique enzyme-linked immunosorbent assay was developed to detect soluble peptidoglycans in biological fluids. It makes use of the similar affinities of vancomycin and purified rabbit antibodies to peptidoglycan precursor sequences found in soluble peptidoglycans. This assay has been used to detect as little as 500 pg of soluble peptidoglycan per ml of serum and 5 pg/ml of urine. Studies of normal individuals and Staphylococcus aureus-infected patients revealed only a few sera with detectable levels of soluble peptidoglycans. Studies of normal volunteers who were given a single oral dose of 250 mg of penicillin VK showed that about half had detectable levels of soluble peptidoglycans in their urine up to 6 h after ingestion. This suggests that soluble peptidoglycans can be released by indigenous bacteria in detectable amounts. In one volunteer, a detectable level of soluble peptidoglycan in the urine at 6 h decreased to an undetectable level at 12 h. Such an ephemeral appearance of soluble peptidoglycan in the urine could account for the small number of human sera that had detectable levels of soluble peptidoglycan.
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1378
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Park H. Why don't women attend for antenatal care? Is that all...? MIDWIVES CHRONICLE 1982; 95:365-6. [PMID: 6923133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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1379
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Lee P, Luhmann NC, Park H, Peebles WA, Taylor RJ, Yu CX. Far-infrared laser scattering studies of density fluctuations in tokamak fusion plasmas. APPLIED OPTICS 1982; 21:1738-1744. [PMID: 20389932 DOI: 10.1364/ao.21.001738] [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
Development of a far-infrared Thomson scattering system for the study of density fluctuations in fusion plasmas is described. New data are presented of naturally occurring low-frequency microturbulence and also of electrostatic modes generated at the ion cyclotron range of frequencies (ICRF). The latter studies are important in understanding ICRF supplementary heating experiments. They have produced the first internal observation of mode-converted ion -Bernstein waves in a tokamak plasma.
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1380
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Park H. A simple washing technique for solid-phase radioimmunoassays and enzyme-linked immunosorbent assays. J Clin Pathol 1981; 34:1309-10. [PMID: 7033300 PMCID: PMC494500 DOI: 10.1136/jcp.34.11.1309] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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1381
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Park H, Chodorow M, Kompfner R. High resolution optical ranging system. APPLIED OPTICS 1981; 20:2389-2394. [PMID: 20332965 DOI: 10.1364/ao.20.002389] [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
An optical ranging system which can see through opaque material has been demonstrated. It uses picosecond pulses, generated in a mode-locked dye laser for viewing and, as a very fast gate, a second frequency offset pulse train with a variable delay at the detector. The system could detect a reflection from a mirror inside an opaque mixture with 64-dB round-trip loss and with 1.7-mm range resolution. Transverse resolution of 0.1 mm was also observed. With certain obvious changes in instrumentation this could be converted into a scanning device. The present depth of penetration (round-trip attenuation) would correspond to 0.67 cm in human tissue.
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1382
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Zalph BL, Dimmey LJ, Park H, Jones PL, Cocks FH. Hydrogenated amorphous boron: Resistivity and doping behavior. ACTA ACUST UNITED AC 1980. [DOI: 10.1002/pssa.2210620264] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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1383
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Chern CJ, Tan P, Park H. Chromosomal mapping of human creatine kinase (brain type) using human-rodent somatic cell hybrids. CYTOGENETICS AND CELL GENETICS 1980; 27:232-7. [PMID: 6934066 DOI: 10.1159/000131491] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Concordant segregation of human brain-type creatine kinase, CK(BB), expression with nucleoside phosphorylase (NP) expression and the presence of chromosome 14 was observed in 53 independently derived cell hybrids between CK(BB)-positive human cells and CK(BB)-negative rodent cells. Further analysis of 26 subclones of two CK(BB)-positive human-mouse cell hybrids confirmed the positive correlation of CK(BB) expression with NP expression. The results suggest that the gene coding for human CK(BB) can be assigned to chromosome 14.
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1384
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Abstract
Abstract
I describe a new technique for improving the sensitivity of the solid-phase "sandwich" assay, by using the through-passage receptacle in a novel flow-communication device. The technique allows a large volume of serum to flow through the antibody-coated receptacle repeatedly during the incubation and is thus termed the "flow-through large-volume incubation" method. Binding of 125I-labeled hepatitis B surface antigen to its corresponding antibody on a solid-phase by this method was more rapid and persistent than binding by the conventional method. When the method was applied to the first incubation of the sandwich assay, the test for the antigen was rendered four-, eight-, and 32-fold as sensitive as an accepted third-generation test for the antigen, by incubating 5-mL volumes of serum at (a) room temperature for 18 h, (b) 45 degrees C for 8 h, or (c) room temperature for seven days, respectively.
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1385
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Yang C, Nussbaum M, Park H. Thrombotic thrombocytopenic purpura in early pregnancy. Remission after plasma exchange. Acta Haematol 1979; 62:112-6. [PMID: 119399 DOI: 10.1159/000207550] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A 24-year-old Chinese female developed fever, fluctuating neurological and renal manifestations, microangopathic hemolytic anemia, and thrombocytopenia during the 11th week of her first pregnancy. Therapy for thrombotic thrombocytopenic purpura (TTP), initiated during the 15th week of her pregnancy, including corticosteroids, platelet aggregation inhibitors, hysterotomy, and splenectomy was ineffective. However, dramatic improvement and remission occurred after plasma exchange of 3,560 ml was performed with the Haemonetics Model 30 Blood Cell Separator.
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1386
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Park H. New technique for solid-phase immunoassay: application to hepatitis B surface antigen. Clin Chem 1979; 25:178-82. [PMID: 761362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
I describe a new technique for improving the sensitivity of the solid-phase "sandwich" assay, by using the through-passage receptacle in a novel flow-communication device. The technique allows a large volume of serum to flow through the antibody-coated receptacle repeatedly during the incubation and is thus termed the "flow-through large-volume incubation" method. Binding of 125I-labeled hepatitis B surface antigen to its corresponding antibody on a solid-phase by this method was more rapid and persistent than binding by the conventional method. When the method was applied to the first incubation of the sandwich assay, the test for the antigen was rendered four-, eight-, and 32-fold as sensitive as an accepted third-generation test for the antigen, by incubating 5-mL volumes of serum at (a) room temperature for 18 h, (b) 45 degrees C for 8 h, or (c) room temperature for seven days, respectively.
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1387
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Abstract
A new, simple, inexpensive plastic device for solid phase immunoassay, the through-passage receptacle (TPR), with a large ratio of surface area to volume, is described. It was substantially more efficient in non-specific protein adsorption and specific immunological binding than the conventional wells of microtiter plates. It was also easier to wash since washing was facilitated by a through-passage with a gravity flow. This device, which should be more conducive to automation than currently used receptacles, should increase the sensitivity and decrease the incubation time of the solid phase immunoassay technique.
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1388
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Park H, Kramer EE, Gray GF. Endometrial sarcoma. NEW YORK STATE JOURNAL OF MEDICINE 1974; 74:1630-1. [PMID: 4526622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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1389
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Goldstein GB, Park H, Yokoyama M. Studies of the precipitating antibody response in pulmonary aspergillosis. INTERNATIONAL ARCHIVES OF ALLERGY AND APPLIED IMMUNOLOGY 1973; 44:1-10. [PMID: 4633167 DOI: 10.1159/000230913] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Fractions of <i>Aspergillus fumigatus </i>obtained by DEAE-cellulose chromatography were used for studying the precipitating antibody in sera from four patients with bronchopulmonary aspergillosis (BPA) and in an additional patient with a pulmonary aspergilloma. Three of the 4 BPA sera demonstrated the precipitin reaction with one or more fractions in gel diffusion, but no individual pattern was identical. In order to further evaluate the nature of the precipitating antibody, the mold fractions prior to testing were exposed to either heat, papain, or to reduction and alkylation. The serum from one subject continued to show a precipitin response in gel in spite of antigen treatment, whereas heating and reduction and alkylation abolished a detectable precipitin reaction by the other two sera. Papain had no apparent effect upon any of the antigens tested. In contrast to BPA, the serum from a subject with an aspergilloma contained multiple precipitating antibodies to the mold fractions studied. These antibodies were developed against antigens which showed varying degrees of lability when exposed to either heat or to reduction and alkylation.
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1390
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Park H, Lucas CE. Perforated Meckel's diverticulum following blunt abdominal trauma. THE JOURNAL OF TRAUMA 1970; 10:706-7. [PMID: 5451082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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1391
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1392
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1393
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Sardesai VM, Park H, Orten JM. A comparison of porphyrin synthesis in certain tissues from normal and anemic dogs: some observations on the in vivo control of porphyrinogenesis. PROCEEDINGS OF THE SOCIETY FOR EXPERIMENTAL BIOLOGY AND MEDICINE. SOCIETY FOR EXPERIMENTAL BIOLOGY AND MEDICINE (NEW YORK, N.Y.) 1968; 127:1164-7. [PMID: 5655660 DOI: 10.3181/00379727-127-32899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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1394
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Park H. Staphylococcal Septicaemia and Perinephric Abscess. West J Med 1940. [DOI: 10.1136/bmj.2.4173.916-a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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1395
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Park H. Observations on Tumors within the Pelvis, occasioning difficult Parturition. Med Chir Trans 1811; 2:298-308. [PMID: 20895145 PMCID: PMC2128819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
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1396
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Park H. Observationson Tumors within the Pelvis, Occasioning Difficult Parturition. J R Soc Med 1811. [DOI: 10.1177/095952871100200127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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1397
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Park H. A Case of Varicose Aneurism. Med Facts Obs 1793; 4:111-118. [PMID: 29106204 PMCID: PMC5110105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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1398
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Park H. Farther Account of a New Method of Treating Diseases of the Joints of the Knee and Elbow. THE LONDON MEDICAL JOURNAL 1790; 11:22-31. [PMID: 29139972 PMCID: PMC5550144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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