7 results on '"Iqbal, S N"'
Search Results
2. Study the Effect of Zn Doping in the Structural and Electrical Properties of CdTe Thin Films
- Author
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Alia A. M. Shehab, Iqbal S. N. Abd, and Hanaa I. Mohammed
- Subjects
CdTe, doping with Zn, Structural and Electrical Properties. ,Science - Abstract
Some of structural ,and electrical properties of pure and zinc (Zn) doped cadmium telluride thin films with impurity percentages (0.5, 1, 1.5)%, deposited on hot glass substrate (temperature equals to 423K) of thickness of 300nm and rate deposition of 0.5 nm.s-1 by thermal co-evaporation technique under vacuum of (2×10-5)Torr have been investigates. The structural properties for the prepared films were studied before and after. doping process by analysis of the X-ray diffraction, and it appeared that pure and dopant CdTe thin films are polycrystalline and have the cubic structure with preferential orientation in the [111] direction, and the crystal structure of the films were improved due to doping process. From d.c.electrical conductivity in range of (291-495)K, we noticed that there are two activation energies Ea1 and Ea2, and their values decrease with the..increase.of.Zn.percentages,so..(σd.c.)..of..those..thin.films.increase . From Hall.effect. measurements we showed that the..(σd.c.).. for CdTe thin film is of n-type and converted to p-type when they adopted with Zn, and charge carrier concentration increases with the increase of Zn percentages, so Hall mobility (μH) decreases
- Published
- 2017
3. Neonatal complications associated with use of fetal scalp electrode: a retrospective study.
- Author
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Kawakita, T, Reddy, UM, Landy, HJ, Iqbal, SN, Huang, C‐C, Grantz, KL, Reddy, U M, Landy, H J, Iqbal, S N, Huang, C-C, and Grantz, K L
- Subjects
PREGNANCY complication risk factors ,DELIVERY (Obstetrics) ,FETAL diseases ,GESTATIONAL age ,SCALP ,DISEASE risk factors ,WOUNDS & injuries ,FETAL heart rate monitoring equipment ,BIRTH injuries ,ELECTRODES ,FETAL heart rate monitoring ,RESEARCH funding ,DISEASE incidence ,RETROSPECTIVE studies ,ODDS ratio - Abstract
Objectives: To estimate the incidence and risk of complications associated with a fetal scalp electrode and to determine whether its application in the setting of operative vaginal delivery was associated with increased neonatal morbidity.Design: Retrospective cohort study.Setting: Twelve clinical centers with 19 hospitals across nine American Congress of Obstetricians and Gynecologists US districts.Population: Women in the USA.Methods: We evaluated 171 698 women with singleton deliveries ≥ 23 weeks of gestation in a secondary analysis of the Consortium on Safe Labor study between 2002 and 2008, after excluding conditions that precluded fetal scalp electrode application such as prelabour caesarean delivery. Secondary analysis limited to operative vaginal deliveries ≥ 34 weeks of gestation was also performed.Main Outcome Measures: Incidences and adjusted odds ratios with 95% confidence intervals of neonatal complications were calculated, controlling for maternal characteristics, delivery mode and pregnancy complications.Results: Fetal scalp electrode was used in 37 492 (22%) of deliveries. In non-operative vaginal delivery, fetal scalp electrode was associated with increased risk of injury to scalp due to birth trauma (1.2% versus 0.9%; adjusted odds ratios 1.62; 95% confidence intervals 1.41-1.86) and cephalohaematoma (1.0% versus 0.9%; adjusted odds ratios 1.57; 95% confidence intervals 1.36-1.83). Neonatal complications were not significantly different comparing fetal scalp electrode with vacuum-assisted vaginal delivery and vacuum-assisted vaginal delivery alone or comparing fetal scalp electrode with forceps-assisted vaginal delivery and forceps-assisted vaginal delivery alone.Conclusions: We found increased neonatal morbidity with fetal scalp electrode though the absolute risk was very low. It is possible that these findings reflect an underlying indication for its use. Our findings support the use of fetal scalp electrodes when clinically indicated.Tweetable Abstract: Neonatal risks associated with fetal scalp electrode use were low (injury to scalp 1.2% and cephalohaematoma 1.0%). [ABSTRACT FROM AUTHOR]- Published
- 2016
- Full Text
- View/download PDF
4. Regulation by adrenocorticotropic hormone of the in vivo expression of scavenger receptor class B type I (SR-BI), a high density lipoprotein receptor, in steroidogenic cells of the murine adrenal gland.
- Author
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Rigotti, A, Edelman, E R, Seifert, P, Iqbal, S N, DeMattos, R B, Temel, R E, Krieger, M, and Williams, D L
- Abstract
The class B, type I scavenger receptor, SR-BI, binds high density lipoprotein (HDL) and can mediate selective uptake of HDL cholesteryl esters by cultured cells. The high levels of expression of SR-BI in steroidogenic tissues and the importance of selective uptake from HDL as a source of cholesterol for steroidogenesis raised the possibility that SR-BI may participate in cholesterol delivery to steroidogenic tissues in vivo. We have used immunoblotting and immunohistochemical methods to show that SR-BI is specifically expressed in a distinctive pattern on the surfaces of steroid-producing cells in the murine adrenal gland's cortex and that its expression in vivo is induced by adrenocorticotropic hormone and suppressed by glucocorticoids. Thus, expression of SR-BI protein is coordinately regulated with adrenal steroidogenesis. These data provide strong support for the hypothesis that SR-BI is a physiologically relevant HDL receptor that provides substrate cholesterol for steroid hormone synthesis.
- Published
- 1996
5. Nonmedically Indicated Induction in Morbidly Obese Women is Not Associated With an Increased Risk of Cesarean Delivery.
- Author
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Kawakita, T., Iqbal, S. N., Huang, C. C., and Reddy, U. M.
- Published
- 2018
- Full Text
- View/download PDF
6. Neonatal complications associated with use of fetal scalp electrode: a retrospective study.
- Author
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Kawakita T, Reddy UM, Landy HJ, Iqbal SN, Huang CC, and Grantz KL
- Subjects
- Adult, Birth Injuries epidemiology, Cardiotocography adverse effects, Delivery, Obstetric methods, Female, Humans, Incidence, Infant, Newborn, Odds Ratio, Pregnancy, Retrospective Studies, Scalp embryology, United States epidemiology, Birth Injuries etiology, Cardiotocography instrumentation, Delivery, Obstetric adverse effects, Electrodes adverse effects, Scalp injuries
- Abstract
Objectives: To estimate the incidence and risk of complications associated with a fetal scalp electrode and to determine whether its application in the setting of operative vaginal delivery was associated with increased neonatal morbidity., Design: Retrospective cohort study., Setting: Twelve clinical centers with 19 hospitals across nine American Congress of Obstetricians and Gynecologists US districts., Population: Women in the USA., Methods: We evaluated 171 698 women with singleton deliveries ≥ 23 weeks of gestation in a secondary analysis of the Consortium on Safe Labor study between 2002 and 2008, after excluding conditions that precluded fetal scalp electrode application such as prelabour caesarean delivery. Secondary analysis limited to operative vaginal deliveries ≥ 34 weeks of gestation was also performed., Main Outcome Measures: Incidences and adjusted odds ratios with 95% confidence intervals of neonatal complications were calculated, controlling for maternal characteristics, delivery mode and pregnancy complications., Results: Fetal scalp electrode was used in 37 492 (22%) of deliveries. In non-operative vaginal delivery, fetal scalp electrode was associated with increased risk of injury to scalp due to birth trauma (1.2% versus 0.9%; adjusted odds ratios 1.62; 95% confidence intervals 1.41-1.86) and cephalohaematoma (1.0% versus 0.9%; adjusted odds ratios 1.57; 95% confidence intervals 1.36-1.83). Neonatal complications were not significantly different comparing fetal scalp electrode with vacuum-assisted vaginal delivery and vacuum-assisted vaginal delivery alone or comparing fetal scalp electrode with forceps-assisted vaginal delivery and forceps-assisted vaginal delivery alone., Conclusions: We found increased neonatal morbidity with fetal scalp electrode though the absolute risk was very low. It is possible that these findings reflect an underlying indication for its use. Our findings support the use of fetal scalp electrodes when clinically indicated., Tweetable Abstract: Neonatal risks associated with fetal scalp electrode use were low (injury to scalp 1.2% and cephalohaematoma 1.0%)., Competing Interests: of interest: The authors report no conflicts of interest. The ICMJE disclosure forms are available as online supporting information., (© 2015 Royal College of Obstetricians and Gynaecologists.)
- Published
- 2016
- Full Text
- View/download PDF
7. Overexpression of the HDL receptor SR-BI alters plasma HDL and bile cholesterol levels.
- Author
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Kozarsky KF, Donahee MH, Rigotti A, Iqbal SN, Edelman ER, and Krieger M
- Subjects
- Adenoviridae genetics, Animals, CD36 Antigens genetics, Cholesterol pharmacokinetics, Fluorescent Dyes, Liver metabolism, Male, Mice, Mice, Inbred C57BL, Receptors, Lipoprotein genetics, Receptors, Scavenger, Recombinant Proteins genetics, Recombinant Proteins metabolism, Scavenger Receptors, Class B, Bile metabolism, CD36 Antigens metabolism, Carrier Proteins, Cholesterol blood, Lipoproteins, HDL blood, Membrane Proteins, RNA-Binding Proteins, Receptors, Immunologic, Receptors, Lipoprotein blood
- Abstract
The risk of atherosclerosis, a leading cause of cardiovascular disease and death, is inversely related to plasma levels of high-density lipoprotein (HDL) cholesterol, although the mechanism of this protective effect is unclear. The class B scavenger receptor, SR-BI, is the first HDL receptor to be well defined at a molecular level and is a mediator of selective cholesterol uptake in vitro. It is expressed most abundantly in steroidogenic tissues, where it is coordinately regulated with steroidogenesis by adrenocorticotropic hormone (ACTH), human chorionic gonadotropin (hCG) and oestrogen, and in the liver, where its expression in rats is suppressed by oestrogen. Here we show that adenovirus-mediated, hepatic overexpression of SR-BI in mice on both sinusoidal and canalicular surfaces of hepatocytes results in the virtual disappearance of plasma HDL and a substantial increase in biliary cholesterol. SR-BI may directly mediate these effects by increasing hepatic HDL cholesterol uptake or by increasing cholesterol secretion into bile, or both. These results indicate that SR-BI may be important in hepatic HDL metabolism, in determining plasma HDL concentrations, and in controlling cholesterol concentrations in bile, and thus may influence the development and progression of atherosclerosis and gallstone disease.
- Published
- 1997
- Full Text
- View/download PDF
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