276
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Moran H, Chen SL, Muirden KD, Jiang SJ, Gu YY, Hopper J, Jiang PL, Lawler G, Bai MX. A comparison of changes seen on radiographs of rheumatoid arthritis patients in Australia and in China. ARTHRITIS AND RHEUMATISM 1987; 30:1298-302. [PMID: 3689464 DOI: 10.1002/art.1780301114] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
To test the hypothesis that rheumatoid arthritis in patients in China is milder in severity than that in patients in a western country, a comparison was made of 2 series of consecutive outpatients with definite or classic rheumatoid arthritis who were attending referral centers in Melbourne, Australia and Shanghai, China. This paper reports the findings on radiographs of the wrists and hands. Making allowances for age and duration of disease, changes were more frequent and severe in the Australian patient series, particularly at the metacarpophalangeal joints.
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277
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Zhang DL, Chen SL. Sinus node electrogram studies in patients with sick sinus syndrome. Chin Med J (Engl) 1987; 100:775-7. [PMID: 3127128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
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278
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Chen SL, Xu YH, Shi SY. [Diagnostic criteria for systemic lupus erythematosus in Chinese patients]. ZHONGHUA NEI KE ZA ZHI 1987; 26:533-6, 565. [PMID: 3450475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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279
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Hao QL, Yamin TT, Pan TC, Chen SL, Chen BS, Kroon PA, Chao YS. Isolation and characterization of a full-length rabbit apolipoprotein E cDNA. Atherosclerosis 1987; 66:125-30. [PMID: 3632744 DOI: 10.1016/0021-9150(87)90187-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
In order to study the primary structure of rabbit apolipoprotein (apo) E and the regulation of levels of liver apo E mRNA by dietary cholesterol, we have cloned and sequenced a full length rabbit apo E cDNA. DNA sequence analyses suggests that rabbit apo E is synthesized with an additional 18 amino acids as the prepeptide. The mature rabbit apo E contains 293 amino acids with a calculated molecular weight of 33,528. It has a 76% amino acid sequence homology with human apo E. Northern blot analyses showed that rabbit apo E mRNA is about 1200 nucleotides in length. Using mRNA dot blot analyses, we found that dietary cholesterol has no effect on the level of apo E mRNA in rabbit liver. We conclude that the elevated levels of plasma apo E in rabbits fed a cholesterol-rich diet is not a result of an increase of levels of apo E mRNA in the liver.
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280
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Wu TT, Hsu HC, Chen DS, Sheu JC, Su IJ, Chen SL, Chuang SM. Clearance of hepatitis B surface antigen (HBsAg) after surgical resection of hepatocellular carcinoma. J Hepatol 1987; 4:45-51. [PMID: 3033059 DOI: 10.1016/s0168-8278(87)80008-9] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The serum HBsAg in 4 chronic HBsAg carrier patients with hepatocellular carcinoma (HCC) cleared within 4-38 months after surgical resection of their hepatic tumors. Two patients developed anti-HBs. During the follow-up period from 21 to 28 months after HBsAg clearance, none of the patients regained positive serum HBsAg. Two patients who had had tissue HBsAg present, exclusively in the tumor, showed quick HBsAg clearance after resection. The other 2 patients had a delayed HBsAg clearance. One had tissue HBsAg in both the tumor and nontumoral liver. Only 1 patient had tissue HBsAg in the liver, but not in the tumor. During the same period of observation of 323 chronic HBsAg carriers, who had a variety of histologically-verified chronic liver diseases and were followed for more than 6 months, only 1 cleared the antigen. The spontaneous HBsAg clearance in our HBsAg carriers (1/323) was significantly lower than that (4/64) of HBsAg-positive HCC patients with tumor resection, P less than 0.004. The mechanisms of HBsAg clearance in HCC patients after surgical resection of tumors are discussed.
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281
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Jiang SJ, Chen SL, Su LD, Yu M, Ma GP, Wang WN, Xu JB, Huang DJ, Qian YY, Gui JS. Systemic scleroderma: a clinical and immunological study. Chin Med J (Engl) 1986; 99:885-92. [PMID: 3107926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
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282
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Chen SL, Gu YY, Su LD. [Large doses of adrenal corticosteroids in the treatment of pericarditis associated with progressive systemic sclerosis]. ZHONGHUA NEI KE ZA ZHI 1986; 25:616-7, 638. [PMID: 3568847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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283
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Zhang DL, Chen SL. [The electrogram of the sinuatrial node and the measurement of SACT]. ZHONGHUA XIN XUE GUAN BING ZA ZHI 1986; 14:201-2. [PMID: 3816514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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284
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Moran H, Chen SL, Muirden KD, Jiang SJ, Gu YY, Hopper J, Jiang PL, Lawler G, Chen RB. A comparison of rheumatoid arthritis in Australia and China. Ann Rheum Dis 1986; 45:572-8. [PMID: 3740981 PMCID: PMC1001939 DOI: 10.1136/ard.45.7.572] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A comparison was made of two series of consecutive outpatients with a presumptive diagnosis of rheumatoid arthritis (RA) attending referral centres in Melbourne and Shanghai. No significant differences were observed in disease onset, course, presence of antinuclear antibodies (ANA), or seropositivity. In the Australian series there was a higher frequency of nodules, Raynaud's phenomenon, carpal tunnel syndrome, and 'classical' in comparison with 'definite' disease, and a lower frequency of lymphadenopathy and hepatomegaly. Joint tenderness and soft tissue swelling tended to be more marked in the Chinese series, while deformity and limited range of movement were less severe. Drug therapy was similar overall but influenced by drug availability. Peptic ulceration was recorded in 28% of the Australian series but in only 6% of the Chinese; although 25% of the Chinese were receiving antacids and 6% antiulcerants. X-rays of hands and feet showed more severe disease in the Australian series. The older age group and longer duration of the disease in the Australian patients, who had more chronic and less active disease, may have influenced some of these results.
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285
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Chen SL, Pan Z, Zhu MZ, Zang YM. [The hemodynamic effect of distention of the stomach in dogs with a normal and stenosed coronary artery]. SHENG LI XUE BAO : [ACTA PHYSIOLOGICA SINICA] 1986; 38:285-92. [PMID: 3775410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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286
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Linehan WM, Kish ML, Chen SL, Andriole GL, Santora AC. Human prostate carcinoma causes hypercalcemia in athymic nude mice and produces a factor with parathyroid hormone-like bioactivity. J Urol 1986; 135:616-20. [PMID: 3003405 DOI: 10.1016/s0022-5347(17)45762-4] [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: 01/03/2023]
Abstract
The mechanism of the calcium and phosphorus abnormalities associated with metastatic prostate carcinoma (CaP) is not yet understood. A tumor model was recently established in which 9479, a human CaP from a patient with prostate carcinoma-induced osteomalacia, was heterotransplanted into athymic nude mice (ANM). In the present study the effect of 9479 on ANM was evaluated. Serum calcium (Ca), phosphorus (P), parathyroid hormone (PTH), 1,25-dihydroxyvitamin D3(1,25-(OH)2D3) and urinary cAMP were measured. Ca was markedly elevated in ANM bearing 9479 vs. age-matched controls (C); the increased Ca returned to control level after tumor removal. Serum PTH was lower in 9479-bearing ANM vs. C while urinary cAMP and serum 1,25-(OH)2D3 levels were elevated. In the ANM bearing 9479, there was a decrease in serum P vs. C which returned to normal after tumor removal. Fractional P excretion was greater in 9479 animals than C. Extracts of 9479 were examined for the presence of parathyroid hormone-like bioactivity by measuring stimulation of intracellular cAMP in ROS 17/2.8 cells. Cyclic AMP stimulation which was found was shown to be inhibited by the competitive PTH antagonist [8Nle, 18Nle, 34Tyr]bPTH-(3-34) amide. These data suggest tumor induction of parathyroid hormone-like humoral modulation of calcium, phosphate and vitamin D metabolism in vivo associated with a parathyroid hormone-like prostate carcinoma product.
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287
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Jiang SJ, Chen SL, Su LD. [A five-year follow-up study of 89 cases of progressive systemic sclerosis]. ZHONGHUA NEI KE ZA ZHI 1985; 24:589-91, 637-8. [PMID: 4092513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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288
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Sun ST, Li SR, Zhu YZ, Chen SL, Wan GZ, Sun YZ, Hou GW, Yu ZH. Clinical study on 500 cases of cerebro-vascular hemiplegia treated by acupuncture through baihui to qubin. J TRADIT CHIN MED 1985; 5:167-70. [PMID: 3853646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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289
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Cunningham TJ, Nicholls KM, Chen SL, Mathews JD, Muirden KD. Defective reticuloendothelial system C3b mediated clearance in rheumatoid arthritis and vasculitis. J Rheumatol 1985; 12:675-9. [PMID: 4057188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
C3b receptor mediated clearance by the reticuloendothelial system (RES) was tested in vivo using autologous C3b coated, technetium labelled erythrocytes in patients with rheumatoid arthritis (RA) and rheumatoid vasculitis. Diminished C3b mediated erythrocyte clearance was found in all patients with rheumatoid vasculitis and some patients with active RA. Normal C3b mediated clearance was found in some patients with previous vasculitis, in remission when tested. These results are consistent with the hypothesis that acquired dysfunction of RES C3b receptors is implicated in the pathogenesis of rheumatoid vasculitis.
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290
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Chen SL, Kim KH. Effect of sulfhydryl-disulfide state on protein phosphorylation: phosphorylation of bovine serum albumin. Arch Biochem Biophys 1985; 239:163-71. [PMID: 2988443 DOI: 10.1016/0003-9861(85)90823-9] [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: 01/03/2023]
Abstract
Bovine serum albumin (BSA) was phosphorylated by the catalytic subunit of cAMP-dependent protein kinase under general protein phosphorylation conditions. The optimal pH for this phosphorylation was 9.0. The K0.5 (the concentration required for 50% of maximal phosphorylation) for BSA at pH 7.5 was 15 microM. One mole of phosphate was incorporated per mole of BSA, and only one phosphopeptide fragment was obtained after extensive proteolysis with trypsin. BSA phosphorylation required dithiothreitol or GSH, but GSH was only one-fiftieth as effective as dithiothreitol. GSSG counteracted the effect of dithiothreitol and GSH. Phosphorylation increased in a time-dependent and dithiothreitol concentration-dependent manner when BSA was preincubated with dithiothreitol. The increase in the incorporation of 32P correlated with the appearance of up to six free sulfhydryl groups. The effect of dithiothreitol on BSA appeared reversible, since reoxidation of reduced BSA decreased its susceptibility to phosphorylation. These experiments showed that this in vitro phosphorylation is dependent on the sulfhydryl-disulfide state of BSA. The possible implications of the sulfhydryl-disulfide state of proteins in the regulation of phosphorylation are discussed.
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291
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Hou ZK, Liu DG, Kao FS, Chen SL. [Studies of termination of early pregnancy with Bromo-Geraminum]. SHENG ZHI YU BI YUN = REPRODUCTION AND CONTRACEPTION 1984; 4:12-4. [PMID: 12340371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
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292
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Li XM, Li LZ, Chen SL, Qiu XH, Yu YH, Pan DX, Zou LL, Yang ZL, Han YS. [Inhibitory effects of sophocarpine on animal tumors]. ZHONGGUO YAO LI XUE BAO = ACTA PHARMACOLOGICA SINICA 1984; 5:125-30. [PMID: 6235710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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293
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Chen SL, Zhao WT, Fang RY, Gu WG, Yan WM, Tu ZP, Liu DL. [Preparation and preliminary clinical applications of 99mTc-p-BIDA, a new hepatobiliary agent]. ZHONGHUA FANG SHE XUE ZA ZHI CHINESE JOURNAL OF RADIOLOGY 1983; 17:38-42. [PMID: 6224660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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294
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Saxe AW, Chen SL, Marx SJ, Brennan MF. In vitro studies of parathyroid hormone release: effect of cimetidine. Surgery 1982; 92:793-8. [PMID: 7135200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
We studied parathyroid hormone (PTH) release from cell suspensions of fresh and cryopreserved human parathyroid tissue. A sensitive PTH assay with midregion specificity and adaptation of "micro" methods of cell plating permitted conservation of tissue (200 microliters aliquots) and high reproducibility (5 to 10 aliquots per experimental condition). Viability of cells in suspension was confirmed by increased PTH release with increased incubation, increased incorporation of tritiated leucine with increased incubation, and incorporation of tritiated leucine following experimental incubation. Because of conflicting reports regarding the in vivo effect of cimetidine on PTH release, we incubated cells from both adenomatous and hyperplastic glands at 0, 10(-4)M, 10(-5)M, and 10(-6)M cimetidine (10(-5)M is therapeutic) and at 0.25, 1 to 1.2, and 2 mM Ca++. Despite occasional statistically significant (P = 0.05) differences in PTH release with and without cimetidine, therapeutic levels of cimetidine had no consistent effect on PTH release from pathologic parathyroid tissue in vitro.
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295
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Chen SL, Kim KH. Identification of the cyclic AMP and ATP binding sites of acetyl coenzyme A carboxylase by use of 5'-p-fluorosulfonylbenzoyladenosine. J Biol Chem 1982; 257:9953-7. [PMID: 6125512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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296
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Chen SL, Snoga JR, Croft H. A short-term in vitro drug-screening assay for cancer chemotherapy. Clin Chem 1982; 28:1852-6. [PMID: 6751606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
In this short-term in vitro assay for detection of tumor cell sensitivity to drugs, we have replaced the traditional soft-agar colony-forming assay with the measurement of DNA synthesis, to determine the cell renewal capability of the tumor cell population. The tumor cells are treated with drugs and cultured for five days. During the last 12--18 h of culture the cells are pulsed with [3H]thymidine, then harvested for scintillation counting. The effects of drugs are expressed as the percentage of DNA synthesis as compared with that of the control. When the % DNA synthesis is less than 40%, the drug is considered to be effective. So far we have studied tumor cells from multiple myeloma, non-Hodgkin's lymphoma, and carcinoma of lung, breast, ovary, stomach, and bladder. The overall negative predictive value is 1.0. The results are available within five days, compared with 21--28 days for completion of soft-agar assays; fewer cells are required; and the process is semiautomated.
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297
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Chen SL, Frank JF, Loewenstein M. Estimation of lactose hydrolysis by freezing point measurements in milk and whey substrates treated with lactases from various microorganisms. JOURNAL - ASSOCIATION OF OFFICIAL ANALYTICAL CHEMISTS 1981; 64:1414-9. [PMID: 6796559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
beta-Galactosidase concentrates obtained from several microorganisms were used to hydrolyze skim milk, low fat (2%) milk, sweet whey, acid whey, acid whey permeate, and acid whey concentrate. Among acid substrates, the freezing point depression for each 1% lactose hydrolyzed was the greatest with the lactase from Aspergillus niger (0.0501 degrees H); among neutral substrates, the depression was greater in sweet whey (0.0495 degree H) and lesser in low fat milk (0.0445 degrees H). All data were statistically significant. The average freezing point depression for each 1% lactose hydrolyzed wa s0.0468 degrees H (range 0.0436-0.0501 degrees H). Oligosaccharides formed in the lactose hydrolysis inconsistent freezing point readings of the cryoscope at the low freezing points measured, and protease contamination in some lactases may affect the precision of freezing point determination. Hydration and volume of non-protein components in commercial enzymes, unstable color complex formed by lactose and methylamine solution, and difficulty in the use of methylamine solution might cause variations in determination of lactose by the analytical procedure. These factors can be eliminated or minimized. This method is the simplest and quickest estimation of lactose hydrolysis, and it offers great accuracy and consistency.
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298
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Chen SL, Boyd JT. Temperature-independent thin-film optical waveguide. APPLIED OPTICS 1981; 20:2280-2283. [PMID: 20332932 DOI: 10.1364/ao.20.002280] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The concept of having the effective refractive index of an optical waveguide mode be independent of temperature is introduced. It is shown that this concept should be realizable with a Corning 7059 glass thin-film waveguide supported on a SiO(2)-Si substrate for a waveguide thickness of 0.37 microm. Measurements of effective refractive index as a function of temperature confirm this prediction of temperature independence in that they show a very small variation with temperature for a 0.35-microm thick waveguide in comparison with that for a 0.98-microm thick waveguide.
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299
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Feldman S, Chen SL, Pickering LK, Cleary TG, Ericsson CD, Hulse M. Salicylate absorption from a bismuth subsalicylate preparation. Clin Pharmacol Ther 1981; 29:788-92. [PMID: 7226711 DOI: 10.1038/clpt.1981.112] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The active ingredient in Pepto-Bismol (PB) (Norwich-Eaton), a common antidiarrheal, is bismuth subsalicylate. The absorption of salicylate after oral PB was studied in six fasted men. Plasma concentrations of total salicylate and the urinary excretion profile of salicylate were determined as a function of time and dose. After 60 ml PB, 500.1 +/- 33.6 mg (mean +/- SD) salicylate were recovered in urine, representing 95.0 +/- 6.4% of salicylic acid equivalents in 60 ml of the formulation. Peak plasma salicylate levels were reached 0.5 to 3 hr after ingestion and averaged 40.1 +/- 17.3 micrograms/ml. Absorption of salicylate was also essentially complete after 15- and 30-ml doses of the antidiarrheal preparation, and a linear relationship between dose and recovery of salicylate in the urine was found. Salicylate kinetics was nonlinear after a multiple-dose regimen of 60 ml every 6 hr for five doses.
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300
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Lombardi FJ, Chen SL, Fulco AJ. A rapidly metabolizing pool of phosphatidylglycerol as a precursor of phosphatidylethanolamine and diglyceride in Bacillus megaterium. J Bacteriol 1980; 141:626-34. [PMID: 6767686 PMCID: PMC293668 DOI: 10.1128/jb.141.2.626-634.1980] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Pulse-chase experiments in Bacillus megaterium ATCC 14581 with [U-14C]palmitate, L-[U-14C]serine, and [U-14C]glycerol showed that a large pool of phosphatidylglycerol (PG) which exhibited rapid turnover in the phosphate moiety (PGt) underwent very rapid interconversion with the large diglyceride (DG) pool. Kinetics of DG labeling indicated that the fatty acyl and diacylated glycerol moieties of PGt were also utilized as precursors for net DG formation. The [U-14C]glycerol pulse-chase results also confirmed the presence of a second, metabolically stable pool of PG (PGs), which was deduced from [32P]phosphate studies. The other major phospholipid, phosphatidylethanolamine (PE), exhibited pronounced lags relative to PG and DG in 14C-fatty acid, [14C]glycerol, and [32P]phosphate incorporation, but not for incorporation of L-[U-14C]serine into the ethanolamine group of PE or into the serine moiety of the small phosphatidylserine (PS) pool. Furthermore, initial rates of L-[U-14C]serine incorporation into the serine and ethanolamine moieties of PS and PE were unaffected by cerulenin. The results provided compelling in vivo evidence that de novo PGt, PS, and PE synthesis in this organism proceed for the most part sequentially in the order PGt yields PS yields PE rather than via branching pathways from a common intermediate and that the phosphatidyl moiety in PS and PE is derived largely from the corresponding moiety in PGt, whereas the DG pool indirectly provides an additional source for this conversion by way of the facile PGt in equilibrium or formed from DG interconversion.
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