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Prasad A, Hastings JL, Shibata S, Popovic ZB, Arbab-Zadeh A, Bhella PS, Okazaki K, Fu Q, Berk M, Palmer D, Greenberg NL, Garcia MJ, Thomas JD, Levine BD. Characterization of static and dynamic left ventricular diastolic function in patients with heart failure with a preserved ejection fraction. Circ Heart Fail 2010; 3:617-26. [PMID: 20682947 DOI: 10.1161/circheartfailure.109.867044] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
BACKGROUND Congestive heart failure in the setting of a preserved left ventricular (LV) ejection fraction is increasing in prevalence among the senior population. The underlying pathophysiologic abnormalities in ventricular function and structure remain unclear for this disorder. We hypothesized that patients with heart failure with preserved ejection fraction (HFPEF) would have marked abnormalities in LV diastolic function with increased static diastolic stiffness and slowed myocardial relaxation compared with age-matched healthy controls. METHODS AND RESULTS Eleven highly screened patients (4 men, 7 women) aged 73±7 years with HFPEF were recruited to participate in this study. Thirteen sedentary healthy controls (7 men, 6 women) aged 70±4 years also were recruited. All subjects underwent pulmonary artery catheterization with measurement of cardiac output, end-diastolic volumes, and pulmonary capillary wedge pressures at baseline; cardiac unloading (lower-body negative pressure or upright tilt); and cardiac loading (rapid saline infusion). The data were used to define the Frank-Starling and LV end-diastolic pressure-volume relationships. Doppler echocardiographic data (tissue Doppler velocities, isovolumic relaxation time, propagation velocity of early mitral inflow , E/A-wave ratio) were obtained at each level of cardiac preload. Compared with healthy controls, patients with HFPEF had similar LV contractile function and static LV compliance but reduced LV chamber distensibility with elevated filling pressures and slower myocardial relaxation as assessed by tissue Doppler imaging. CONCLUSIONS In this small, highly screened patient population with hemodynamically confirmed HFPEF, increased end-diastolic static ventricular stiffness relative to age-matched controls was not a universal finding. Nevertheless, patients with HFPEF, even when well compensated, had elevated filling pressures, reduced distensibility, and increased diastolic wall stress compared with controls. In contrast, LV relaxation as assessed by tissue Doppler variables appeared consistently impaired in patients with HFPEF.
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Prasad A, Mukherjee KA, Kaul S, Kaur M. Post Operative Pain after Cholecystectomy: Conventional Laparoscopy Versus Single Incision Laparoscopic Surgery (SILS). APOLLO MEDICINE 2010. [DOI: 10.1016/s0976-0016(11)60092-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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228
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Creedon M, Prasad A, Suri R, Kozlowska W. Are serum vitamin D levels >75nmol/L achievable in children with cystic fibrosis? J Cyst Fibros 2010. [DOI: 10.1016/s1569-1993(10)60354-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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229
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Prasad A, Liu D, Rasul M, Ahmed N, Seiter K. Prevalence of familial malignancy in a prospectively screened cohort of patients with leukemia. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.6590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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230
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Drazner MH, Prasad A, Ayers C, Markham DW, Hastings J, Bhella PS, Shibata S, Levine BD. The relationship of right- and left-sided filling pressures in patients with heart failure and a preserved ejection fraction. CIRCULATION. HEART FAILURE 2010; 3:202-6. [PMID: 20233992 DOI: 10.1161/circheartfailure.108.876649] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Although right-sided filling pressures often mirror left-sided filling pressures in systolic heart failure, it is not known whether a similar relationship exists in heart failure with preserved ejection fraction. METHODS AND RESULTS Eleven subjects with heart failure with preserved ejection fraction underwent right heart catheterization at rest and under loading conditions manipulated by lower body negative pressure and saline infusion. Right atrial pressure (RAP) was classified as elevated when >or=10 mm Hg and pulmonary capillary wedge pressure (PCWP) when >or=22 mm Hg. If both the RAP and the PCWP were elevated or both not elevated, they were classified as concordant; otherwise, they were classified as discordant. Correlation of RAP and PCWP was determined by a repeated measures model. Among 66 paired measurements of RAP and PCWP, 44 (67%) had a low RAP and PCWP and 8 (12%) a high RAP and PCWP, yielding a concordance rate of 79%. In a sensitivity analysis performed by varying the definition of elevated RAP (from 8 to 12 mm Hg) and PCWP (from 15 to 25 mm Hg), the mean+/-SD concordance of RAP and PCWP was 76+/-10%. The correlation coefficient of RAP and PCWP for the overall cohort was r=0.86 (P<0.0001). CONCLUSIONS Right-sided filling pressures often reflect left-sided filling pressures in heart failure with preserved ejection fraction, supporting the role of estimation of jugular venous pressure to assess volume status in this condition.
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231
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Yadav J, Ather H, Rao N, Reddy M, Prasad A. Stereoselective Synthesis of (-)-Pironetin by an Iterative Prins Cyclisation and Reductive Cleavage Strategy. Synlett 2010. [DOI: 10.1055/s-0029-1219810] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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232
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Cruz JM, Escalona J, Parmananda P, Karnatak R, Prasad A, Ramaswamy R. Phase-flip transition in coupled electrochemical cells. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2010; 81:046213. [PMID: 20481813 DOI: 10.1103/physreve.81.046213] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2010] [Revised: 03/15/2010] [Indexed: 05/29/2023]
Abstract
Time delay is introduced in the coupling between a pair of electrochemical cells. As coupling parameters are varied, the anodic current in the two cells oscillate in synchrony in regimes of periodic as well as chaotic dynamics. When the time delay is varied a phase-flip transition is observed: the relative phase between the synchronized oscillations changes abruptly by pi . This is accompanied by an experimentally measurable discontinuous change in the frequency of the synchronized oscillators.
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Prasad A, Jeevan HS, Geibel C, Hossain Z. Suppression of quadrupolar order on Si doping in YbRu(2)(Ge(1 - x)Si(x))(2). JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2010; 22:126004. [PMID: 21389502 DOI: 10.1088/0953-8984/22/12/126004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We have investigated the magnetic properties of polycrystalline Y bRu(2)(Ge(1 - x)Si(x))(2) samples using magnetic susceptibility, electrical resistivity, and specific heat measurements. All the results indicate that the Yb ions in Y bRu(2)(Ge(1 - x)Si(x))(2) are in a stable trivalent state. The antiferromagnetic ordering shifts to lower temperature with increasing Si concentration (x). The weak Kondo-like resistivity minimum observed in the resistivity data for x = 0 shifts toward lower temperature with an increase in the Si content and finally disappears. The most dramatic observation is the complete suppression of the quadrupolar ordering in Y bRu(2)Ge(2) (T(Q) = 10 K) even for 2% Si doping.
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Drazner MH, Prasad A, Ayers C, Markham DW, Hastings J, Bhella PS, Shibata S, Levine BD. The Relationship of Right- and Left-Sided Filling Pressures in Patients With Heart Failure and a Preserved Ejection Fraction. Circ Heart Fail 2010. [DOI: 10.1161/circheartfailure.109.876649] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background—
Although right-sided filling pressures often mirror left-sided filling pressures in systolic heart failure, it is not known whether a similar relationship exists in heart failure with preserved ejection fraction.
Methods and Results—
Eleven subjects with heart failure with preserved ejection fraction underwent right heart catheterization at rest and under loading conditions manipulated by lower body negative pressure and saline infusion. Right atrial pressure (RAP) was classified as elevated when ≥10 mm Hg and pulmonary capillary wedge pressure (PCWP) when ≥22 mm Hg. If both the RAP and the PCWP were elevated or both not elevated, they were classified as concordant; otherwise, they were classified as discordant. Correlation of RAP and PCWP was determined by a repeated measures model. Among 66 paired measurements of RAP and PCWP, 44 (67%) had a low RAP and PCWP and 8 (12%) a high RAP and PCWP, yielding a concordance rate of 79%. In a sensitivity analysis performed by varying the definition of elevated RAP (from 8 to 12 mm Hg) and PCWP (from 15 to 25 mm Hg), the mean±SD concordance of RAP and PCWP was 76±10%. The correlation coefficient of RAP and PCWP for the overall cohort was
r
=0.86 (
P
<0.0001).
Conclusions—
Right-sided filling pressures often reflect left-sided filling pressures in heart failure with preserved ejection fraction, supporting the role of estimation of jugular venous pressure to assess volume status in this condition.
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235
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Yadav J, Thrimurtulu N, Venkatesh M, Prasad A. The Stereoselective Total Synthesis of Aculeatin A and B via Prins Cyclization. SYNTHESIS-STUTTGART 2009. [DOI: 10.1055/s-0029-1217144] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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236
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Yadav J, Thrimurtulu N, Venkatesh M, Rao K, Prasad A, Reddy B. Stereoselective Synthesis of (10S,12S)-10-Hydroxy-12-methyl-1-oxacyclododecane-2,5-dione via Prins Cyclization. SYNTHESIS-STUTTGART 2009. [DOI: 10.1055/s-0029-1217107] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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237
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Kolbehdari D, Wang Z, Grant JR, Murdoch B, Prasad A, Xiu Z, Marques E, Stothard P, Moore SS. A whole genome scan to map QTL for milk production traits and somatic cell score in Canadian Holstein bulls. J Anim Breed Genet 2009; 126:216-27. [PMID: 19646150 DOI: 10.1111/j.1439-0388.2008.00793.x] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The detection and mapping of genetic markers linked to quantitative trait loci (QTL) can be utilized to enhance genetic improvement of livestock populations. With the completion of the bovine genome sequence assembly, single nucleotide polymorphisms (SNP) assays spanning the whole bovine genome and research work on large scale identification, validation and analysis of genotypic variation in cattle has become possible. The objective of the present study was to perform a whole genome scan to identify and map QTL affecting milk production traits and somatic cell scores using linkage disequilibrium (LD) regression and 1536 SNP markers. Three and 18 SNP were found to be associated with only milk yield (MY) at a genome and chromosome wise significance (p < 0.05) level respectively. Among the 21 significant SNP, 16 were in a region reported to have QTL for MY in other dairy cattle populations and while the rest five were new QTL finding. Four SNP out of 21 are significant for the milk production traits (MY, fat yield, protein yield (PY), and milk contents) in the present study. Six and nine SNP were associated with PY at a genome and chromosome wise significant (p < 0.05) level respectively. Three and 17 SNP were found to be associated with FY at a genome and chromosome wise significant (p < 0.05) level. Five and seven SNP were mapped with somatic cell score at a genome and chromosome wise significant (p < 0.05) level respectively. The results of this study have revealed QTL for MY, PY, protein percentage, FY, fat percentage, somatic cell score and persistency of milk in the Canadian dairy cattle population. The chromosome regions identified in this study should be further investigated to potentially identify the causative mutations underlying the QTL.
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238
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Prasad A, Iverson L, Matthews S, Peters M. Atlases of Tree and Bird Species Habitats for Current and Future Climates. ECOL RESTOR 2009. [DOI: 10.3368/er.27.3.260] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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239
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Prasad A, Zafar N, Mahmud E. Assessment of renal artery fibromuscular dysplasia: angiography, intravascular ultrasound (with virtual histology), and pressure wire measurements. Catheter Cardiovasc Interv 2009; 74:260-4. [PMID: 19213069 DOI: 10.1002/ccd.21968] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Fibromuscular dysplasia (FMD) of the renal arteries is classically associated with secondary hypertension in younger individuals, which may be treatable and even curable by percutaneous transluminal renal angioplasty. Angiography of these renal arteries often displays "beaded" luminal abnormalities. The angiographic findings, however, may not accurately reflect the severity or precise location of the intraluminal obstruction. We present a case of an older individual with longstanding hypertension and FMD, in whom the use of a coronary pressure wire and intravascular ultrasound enabled precise localization and treatment of the hemodynamically significant stenosis. Virtual histology of FMD in the renal vasculature is also reported.
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240
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Lavi S, Bae JH, Rihal CS, Prasad A, Barsness GW, Lennon RJ, Holmes DR, Lerman A. Segmental coronary endothelial dysfunction in patients with minimal atherosclerosis is associated with necrotic core plaques. Heart 2009; 95:1525-30. [PMID: 19497916 DOI: 10.1136/hrt.2009.166017] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND/OBJECTIVE Endothelial dysfunction and atherosclerosis are systemic disorders, but are often characterised by segmental involvement and complications. A potential mechanism for local involvement early in the disease process may be related to plaque composition. This study was designed to test the hypothesis that in patients with minimal coronary atherosclerosis, coronary artery segments with abnormal endothelial function have specific plaque characteristics. METHODS Intravascular ultrasound (IVUS) images were obtained from 30 patients who underwent coronary endothelial function assessment. Spectral analysis of the IVUS radiofrequency data was used for assessment of plaque composition. IVUS findings of the coronary sections were compared according to the corresponding endothelial response to acetylcholine. RESULTS Sections with a decrease epicardial coronary arterial diameter in response to acetylcholine had smaller baseline lumen (7.5 (2.4) mm(2) vs 8.8 (3.3) mm(2), p = 0.006) but larger plaque burden (37.1% (9.4%) vs 31% (7%), p = 0.003) than sections with normal endothelial response. Sections with endothelial dysfunction had larger necrotic core plaques: 0.13 (0.03-0.33) mm(2) vs 0.0 (0.0-0.07), p<0.001 and more dense calcium: 0.03 (IQR 0.0-0.13) mm(2) vs 0.0 (0.0-0.10) mm(2), p<0.01), than those with normal endothelial response. Only necrotic core area was associated with endothelial dysfunction (p<0.001) after adjusting for other measures. CONCLUSIONS This study suggests that local coronary endothelial dysfunction in patients with minimal coronary atherosclerosis is associated with plaque characteristics that are typical of vulnerable plaques.
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241
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Madhavan M, Borlaug BA, Lerman A, Rihal CS, Prasad A. Stress hormone and circulating biomarker profile of apical ballooning syndrome (Takotsubo cardiomyopathy): insights into the clinical significance of B-type natriuretic peptide and troponin levels. Heart 2009; 95:1436-41. [PMID: 19468013 DOI: 10.1136/hrt.2009.170399] [Citation(s) in RCA: 132] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
OBJECTIVE To evaluate the stress neurohumoral and cardiac biomarker profile of patients with apical ballooning syndrome (ABS). METHODS Plasma-free metanephrines, B-type natriuretic peptide (BNP), high sensitivity C-reactive protein (hsCRP) and troponin T, as well as 24-hour urine catecholamines, metanephrines and free cortisol were measured in 19 ABS and 10 ST-elevation myocardial infarction (STEMI) patients. RESULTS An antecedent stressful event was identified in 15 ABS patients. There were no differences in plasma normetanephrine (median 0.64 (IQ range 0.43-0.97) nmol/l vs 0.53 (0.32-0.77) nmol/l, p = 0.44), metanephrine (0.10 (0.10-0.22) nmol/l vs 0.16 (0.10-0.38) nmol/l, p = 0.29), or cortisol levels (16.0 (7.3-44.0) microg/dl vs 13.0 (10.5-23.5) microg/dl, p = 0.95) between ABS and STEMI patients. The 24-hour urine metanephrines, catecholamines and cortisol levels were normal in the majority of ABS patients. Troponin T levels were lower (0.62 (0.18-0.84) ng/ml vs 3.80 (2.04-6.57) ng/ml, p<0.001), but BNP levels were higher in ABS compared with STEMI (944 (650-2022) pg/ml vs 206 (140-669) pg/ml, p = 0.009). HsCRP was similarly elevated in the two groups (11.0 (5.1-110.8) mg/l and 24.3 (8.1-88.6) mg/l, p = 0.78). CONCLUSIONS Catecholamine and cortisol levels were not elevated in our cohort of ABS, suggesting that routine measurement of these stress hormones is unlikely to be of diagnostic value in practice. In contrast to STEMI, ABS is characterised by a greater elevation in BNP and less myonecrosis.
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Dueck GS, Chua N, Prasad A, Stewart D, White D, vanderJagt R, Johnston JB, Belch A, Reiman T. Activity of lenalidomide in a phase II trial for T-cell lymphoma: Report on the first 24 cases. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.8524] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
8524 Background: Novel therapies are needed to improve outcomes in T-cell lymphomas. We report the interim results of a prospective multicenter trial evaluating lenalidomide in T-cell lymphomas. Methods: Patients with relapsed and refractory T-cell lymphomas other than mycosis fungoides were prescribed oral lenalidomide (25mg daily) on days 1 to 21 of each 28 day cycle, with standardized dose reductions for toxicity. Treatment continued until disease progression, death or unacceptable toxicity. The primary endpoint was overall response rate, and secondary endpoints were complete and partial response rates, progression-free and overall survival (PFS, OS), and safety. The two-stage design allows for up to 40 patients. Results: At the time of this interim analysis, 24 patients were enrolled in this study and 23 were evaluable for response. The median age was 65 years. ECOG PS was 0–1 (n=15), 2 (n=7), 3 (n=2). The histology was peripheral T-cell unspecified (PTCL-u, n=10), angioimmunoblastic (n=7), anaplastic large cell (n=5), enteropathic T-cell (n=1) and hepatosplenic gamma/delta (n=1). Median number of prior therapies was 1 (range, 0–4), and three had prior autologous stem cell transplant. Four patients were previously untreated and not candidates for combination chemotherapy. Median time from completion of prior therapy to the start of lenalidomide was 8 months (range, 1–48 months). The overall response rate was 7/23 (30%); all were partial responses. Two patients had stable disease (SD) for ≥3 cycles. Responses were seen in anaplastic, angioimmunoblastic, and PTCL-u histologies. Median PFS was 96 days (range, 8–696 days). Median OS was 241 days (range, 8–696+ days). Among the 9 patients with SD or better, median PFS was 168 days and median OS has not yet been reached with 241–696 days of follow-up. The most common grade 4 adverse event was thrombocytopenia (33.3%). The most common grade 3 adverse events were neutropenia (20.8%), febrile neutropenia (16.7%), and pain NOS (16.7%). Conclusions: In relapsed and refractory T-cell lymphomas, oral lenalidomide monotherapy has clinical activity and toxicity is consistent with the known profile of lenalidomide. Further study of lenalidomide in these diseases is warranted. [Table: see text]
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Prasad A, Hossain Z, Jeevan HS, Geibel C. YbNiB(4): a Kondo lattice with low-dimensional antiferromagnetic fluctuations. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2009; 21:206003. [PMID: 21825540 DOI: 10.1088/0953-8984/21/20/206003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We have grown single crystals of YbNiB(4) using a Ni(60)B(40) flux and determined the magnetic properties of this compound by means of magnetic susceptibility, specific heat and electrical resistivity measurement. Yb ions in YbNiB(4) are in a trivalent state and present a transition from a paramagnetic state to an antiferromagnetic (AF) state at T(N1) = 5.4 K and a further transition towards a second AF state at T(N2) = 4.0 K. Kondo type behavior in the resistivity and an enhanced Sommerfeld coefficient γ = 100 mJ mol(-1) K(-2) provide evidence for a significant Kondo interaction. A broad maximum in χ(T) at around 8 K, well above T(N1), suggests low-dimensional antiferromagnetic correlations. Both mechanisms lead to strong fluctuation in an extended temperature range above T(N1), up to the characteristic energy of this system, which was estimated to be T(4f) = 16 K from an analysis of the entropy.
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Dwivedi M, Mishra A, Prasad A, Azim A, Singh RK, Baronia AK, Prasad KN, Dwivedi UN. Aeromonas caviae septicemia in immunocompetent gastrointestinal carriers. Braz J Infect Dis 2009; 12:547-8. [PMID: 19287850 DOI: 10.1590/s1413-86702008000600023] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2008] [Accepted: 11/24/2008] [Indexed: 11/22/2022] Open
Abstract
Aeromonas caviae strains have been isolated from blood and stool cultures of three immunocompetent patients, residents of Northern India, who presented with community acquired septicemia without any recent history of diarrhea. Cell culture infectivity test performed on Hep-2 cells have shown substantial degree of invasiveness in the isolated strains. This case unleashes a possibility of asymptomatic gastrointestinal carriage of such strains of A. caviae in a very large population of India, as several areas of India have very high rates of Aeromonas induced acute diarrhea/gastroenteritis (up to 13%). It needs to be appraised further in India as well as other countries having high rates of Aeromonas induced acute diarrhea/gastroenteritis.
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Chhillar AK, Yadav V, Kumar A, Kumar M, Parmar VS, Prasad A, Sharma GL. Differential expression ofAspergillus fumigatusprotein in response to treatment with a novel antifungal compound, diethyl 4-(4-methoxyphenyl)-2,6-dimethyl-1,4-dihydropyridin-3,5-dicarboxylate. Mycoses 2009; 52:223-7. [DOI: 10.1111/j.1439-0507.2008.01563.x] [Citation(s) in RCA: 8] [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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Mahmud E, Prasad A. Optimal Antiplatelet Therapy During Percutaneous Coronary Interventions Includes Glycoprotein IIb/IIIa Inhibitors. J Am Coll Cardiol 2009; 53:846-8. [DOI: 10.1016/j.jacc.2008.12.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2008] [Revised: 12/04/2008] [Accepted: 12/05/2008] [Indexed: 11/17/2022]
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Yadav J, Thrimurtulu N, Gayathri K, Reddy B, Prasad A. First Stereoselective Total
Synthesis of Sporostatin and Determination of Absolute
Configuration. Synlett 2009. [DOI: 10.1055/s-0028-1087956] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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249
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Roy PD, Prasad A, Das MK. Study of the physical properties of a mesogenic mixture showing induced smectic A(d) phase by refractive index, density and x-ray diffraction measurements. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2009; 21:075106. [PMID: 21817321 DOI: 10.1088/0953-8984/21/7/075106] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The binary mixture of 4-n-pentyl phenyl 4-n'-hexyloxy benzoate (ME6O.5) and p-cyanophenyl trans-4-pentyl cyclohexane carboxylate (CPPCC) shows the presence of an induced smectic A(d) phase in a certain concentration range 0.03<x(CPPCC)<0.6. The results of the differential scanning calorimetry (DSC), refractive indices, densities and x-ray diffraction measurements are reported here. In general, the change in birefringence is continuous at the smectic A(d) to nematic phase transition for mixtures with x>0.33, whereas there is a discontinuity in these values for mixtures with x<0.33, consistent with the density and transition entropy measurements done on this system. The orientational order parameter, measured from x-ray diffraction studies, are somewhat smaller than those obtained from refractive index measurement in the induced smectic phase for all the mixtures. In the smectic phase, the OOP values initially increases with molar concentration up to x = 0.24 and then decreases showing a broad minima around x = 0.4. The variation of layer thickness in the induced smectic phase with composition has been explained by assuming the formation of homo- and heterodimers. We conclude that the possible packing of molecules in the induced smectic A(d) phase stabilizes the layers but increases the orientational free volume, consistent with the lower orientational order parameter.
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250
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Raichlin E, Bae JH, Kushwaha S, Lennon R, Prasad A, Rihal C, Lerman A. 287: Inflammatory Burden of Cardiac Allograft Coronary Atherosclerotic Plaque Is Associated with Recurrent Acute Cellular Rejections and Predicts a Higher Risk of Vasculopathy Progression. J Heart Lung Transplant 2009. [DOI: 10.1016/j.healun.2008.11.294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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