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Kamal A, Ahmed S, Reddy K, A. Khan M, Shetty R, Siddhardha B, Murty U, China A, Nagaraja V. Synthesis and Biological Evaluation of a New Series of Benzothiazole-Benzothiadiazine Conjugates as Antibacterial Agents. LETT DRUG DES DISCOV 2007. [DOI: 10.2174/157018007782794563] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Kamal A, Shankaraiah N, Reddy K, Devaiah V, Juvekar A, Sen S. Design, Synthesis and Biological Activity of A-C8/C-C2-Linked 6-Chloropurine-Pyrrolobenzodiazepine Hybrids as Anticancer Agents. LETT DRUG DES DISCOV 2007. [DOI: 10.2174/157018007782794482] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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128
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Kamal A, Reddy K, Khan MN, Shetty R, Ahmed S, Kumar K, Murty U. An Efficient Synthesis of Quinoline Derivatives: Bio-Active Studies. LETT DRUG DES DISCOV 2007. [DOI: 10.2174/157018007782794536] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Malecki-Brown LM, White JR, Reddy KR. Soil biogeochemical characteristics influenced by alum application in a municipal wastewater treatment wetland. JOURNAL OF ENVIRONMENTAL QUALITY 2007; 36:1904-1913. [PMID: 17965393 DOI: 10.2134/jeq2007.0159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Constructed treatment wetlands are a relatively low-cost alternative used for tertiary treatment of wastewater. Phosphorus (P) removal capacity of these wetlands may decline, however, as P is released from the accrued organic soils. Little research has been done on methods to restore the treatment capacity of aging constructed wetlands. One possibility is the seasonal addition of alum during periods of low productivity and nutrient removal. Our 3-mo mesocosm study investigated the effectiveness of alum in immobilizing P during periods of reduced treatment efficiency, as well as the effects on soil biogeochemistry. Eighteen mesocosms were established, triplicate experimental and control units for Typha sp., Schoenoplectus californicus, and submerged aquatic vegetation (SAV) (Najas guadalupensis dominated). Alum was slowly dripped to the water column of the experimental units at a rate of 0.91 g Al m(-2) d(-1) and water quality parameters were monitored. Soil cores were collected at experiment initiation and completion and sectioned into 0- to 5- and 5- to 10-cm intervals for characterization. The alum floc remained in the 0- to 5-cm surface soil, however, soil pH and microbial parameters were impacted throughout the upper 10 cm with the lowest pH found in the Typha treatment. Plant type did not impact most biogeochemical parameters; however, data were more variable in the SAV mesocosms. Amorphous Al was greater in the surface soil of alum-treated mesocosms, inversely correlated with soil pH and microbial biomass P in both soil layers. Microbial activity was also suppressed in the surface soil of alum-treated mesocosms. This research suggests alum may significantly affect the biogeochemistry of treatment wetlands and needs further investigation.
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Enriquez AD, Campbell MS, Reddy KR. Cost-effectiveness of suppressing hepatitis B virus DNA in immune tolerant patients to prevent hepatocellular carcinoma and cirrhosis. Aliment Pharmacol Ther 2007; 26:383-91. [PMID: 17635373 DOI: 10.1111/j.1365-2036.2007.03382.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
BACKGROUND For patients with hepatitis B virus (HBV) infection in the immune tolerant phase, the current standard of care is to not offer treatment. However, the recent Risk Evaluation of the Viral Load Elevation and Associated Liver Disease/Cancer-In study results show a striking relationship between high HBV DNA levels and risk for hepatocellular carcinoma and cirrhosis. AIM In a cost effectiveness analysis, to assess whether immune tolerant patients with high HBV DNA levels should undergo treatment. METHODS We created a lifetime Markov model to evaluate the cost-effectiveness of two strategies for immune tolerant hepatitis B: (i) HBV DNA suppression with lamivudine, (ii) no treatment. Patients cycled between the following health states: viral suppression, ongoing viremia, seroconversion, hepatocellular carcinoma, cirrhosis and death. RESULTS Compared with the no treatment strategy, lamivudine therapy was more expensive but more cost-effective with an additional cost of $5784 and $12 584 per quality adjusted life year gained in males and females, respectively. Treatment resulted in a gain in life expectancy and a decrease in lifetime risk of hepatocellular carcinoma and cirrhosis. CONCLUSIONS Suppressing HBV DNA to prevent hepatocellular carcinoma and cirrhosis in immune tolerant patients is very cost-effective, and treatment of these patients may be considered. Future prospective clinical trials will need to be undertaken to confirm our findings.
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Davis CL, Feng S, Sung R, Wong F, Goodrich NP, Melton LB, Reddy KR, Guidinger MK, Wilkinson A, Lake J. Simultaneous liver-kidney transplantation: evaluation to decision making. Am J Transplant 2007; 7:1702-9. [PMID: 17532752 DOI: 10.1111/j.1600-6143.2007.01856.x] [Citation(s) in RCA: 172] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Questions about appropriate allocation of simultaneous liver and kidney transplants (SLK) are being asked because kidney dysfunction in the context of liver failure enhances access to deceased donor organs. There is specific concern that some patients who undergo combined liver and kidney transplantation may have reversible renal failure. There is also concern that liver transplants are placed prematurely in those with end-stage renal disease. Thus to assure allocation of transplants only to those truly in need, the transplant community met in March 2006 to review post-MELD (model for end-stage liver disease) data on the impact of renal function on liver waitlist and transplant outcomes and the results of SLK.
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Basavaraj S, Duvvi S, Korimarla V, Reddy K. Warfarin and epistaxis. Clin Otolaryngol 2007. [DOI: 10.1111/j.1365-2273.2007.01419_6.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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133
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Bruland GL, Osborne TZ, Reddy KR, Grunwald S, Newman S, DeBusk WF. Recent changes in soil total phosphorus in the Everglades: Water Conservation Area 3. ENVIRONMENTAL MONITORING AND ASSESSMENT 2007; 129:379-95. [PMID: 17057968 DOI: 10.1007/s10661-006-9371-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2005] [Accepted: 06/28/2006] [Indexed: 05/12/2023]
Abstract
We assessed recent changes in the distribution of soil total phosphorus (TP) in Water Conservation Area 3 (WCA-3) of the Everglades. Soil cores were collected in 1992 and 2003 at 176 sites. To reflect hydrologic boundaries within the system, WCA-3 was divided into three zones (3AN, 3AS, and 3B). Total P was mapped on both a mass (TPm) and a volumetric basis (TPv) to determine if spatial distributions varied depending on the choice of units. Interpolated maps for both years showed that the highest levels of TPm were located in 3AN and in boundary areas of all zones that received surface water inputs of P from canals. Increases in TPm were greatest in central 3AN in an area adjacent to the Miami Canal that received inputs from a water control structure. Interpolated maps for TPv illustrated that a hotspot present in 1992 had disappeared by 2003. The highest levels of TPv in 2003 were located in northwestern 3AN, a region of WCA-3 that has been chronically overdrained and burned in 1999. From 1992 to 2003, increases in TPm were observed for 53% of the area of WCA-3, while only 16% of WCA-3 exhibited increases in TPv. In 1992, approximately 21% of WCA-3 had TPm concentrations in the 0-10 cm layer >500 mg kg(-1), indicating P enrichment beyond historic levels. Eleven years later, 30% of the area of WCA-3 had TPm >500 mg kg(-1). This indicated that during this period, the area of WCA-3 with enriched TPm concentrations increased about one % year(-1).
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Inglett PW, Reddy KR, Newman S, Lorenzen B. Increased soil stable nitrogen isotopic ratio following phosphorus enrichment: historical patterns and tests of two hypotheses in a phosphorus-limited wetland. Oecologia 2007; 153:99-109. [PMID: 17375325 DOI: 10.1007/s00442-007-0711-5] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2006] [Accepted: 02/26/2007] [Indexed: 10/23/2022]
Abstract
We used a P enrichment gradient in the Everglades to investigate patterns of the stable N isotopic ratio (delta(15)N) in peat profiles as an indicator of historic eutrophication of this wetland. We also tested two hypotheses to explain the effects of P on increased delta(15)N of organic matter including: (1) increased N mineralization/N loss, and (2) reduced isotopic discrimination during macrophyte N uptake. Spatial patterns of delta(15)N in surface litter and soil (0-10 cm) mimic those of the aboveground macrophytes (Typha domingensis Pers. and Cladium jamaicense Crantz). Peat profiles also show increased delta(15)N in the peat accumulated in areas near the historic P discharges since the early 1960s. The increased delta(15)N of bulk peat correlated well with both measured increases in soil total P and the historical beginning of nutrient discharges into this wetland. In 15-day bottle incubations of soil, added P had no effect on the delta(15)N of NH (4) (+) and significantly increased the delta(15)N of water-extractable organic N. Measurements of surface soils collected during a field mesocosm experiment also revealed no significant effect of P on delta(15)N even after 5 years of P addition. In contrast, delta(15)N of leaf and root tissues of hydroponically grown Typha and Cladium were shown to increase up to 12 per thousand when grown at elevated levels of P and fixed levels of N (as NH (4) (+) ). The magnitude of changes in delta(15)N resulting from altered discrimination during N uptake is significant compared with other mechanisms affecting plant delta(15)N, and suggests that this may be the dominant mechanism affecting delta(15)N of organic matter following P enrichment. The results of this study have implications for the interpretation of delta(15)N as an indicator of shifts in relative N limitation in wetland ecosystems, and also stress the importance of experimental validation in interpreting delta(15)N patterns.
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Sengupta S, Reddy K, Pillai M. Prolapsed cervical fibroid in pregnancy: a challenging obstetric dilemma. J OBSTET GYNAECOL 2007; 26:823-4. [PMID: 17130052 DOI: 10.1080/01443610600994700] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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136
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Rao P, Subramanian P, Reddy K. Standardisation of homoeopathic drug – Hypericum perforatum L. INDIAN JOURNAL OF RESEARCH IN HOMOEOPATHY 2007. [DOI: 10.53945/2320-7094.1808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
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137
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Minet W, Sommer D, Murty N, Reddy K, Midia M. A Retrospective Comparison of Endoscopic-Assisted versus Purely Endoscopic Approach to Sellar Tumor Resection. Skull Base 2007. [DOI: 10.1055/s-2006-958338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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138
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Abstract
Interventional cardiology is an innovative and expanding field. Anaesthetists are increasingly involved in managing complex congenital and acquired heart lesions in the cardiac catheterisation laboratory. This article provides an overview of common lesions encountered in the cardiac catheterisation laboratory, the anaesthetic management of patients with congenital and acquired heart lesions, the procedures performed and the complications encountered during such procedures.
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139
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Chauhan A, Reddy KR, Ogram AV. Syntrophic-archaeal associations in a nutrient-impacted freshwater marsh. J Appl Microbiol 2006; 100:73-84. [PMID: 16405687 DOI: 10.1111/j.1365-2672.2005.02751.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIMS Evaluation of the composition, distribution and activities of syntrophic bacteria and methanogens in soils from eutrophic and low nutrient regions of a freshwater marsh, and to compare these results with those obtained from a similar study in the Florida Everglades. METHODS AND RESULTS Culture dependent and independent approaches were employed to study consortia of syntrophs and methanogens in a freshwater marsh. Methanogenesis from butyrate oxidation was fourfold higher in microcosms containing soil from eutrophic regions of the marsh than from low nutrient regions. Propionate was oxidized in eutrophic microcosms at lower rates than butyrate and with lower yields of methane. Sequence analysis of 16S rRNA gene clone libraries from DNA extracted from microcosms and soils revealed differences such that the dominant restriction fragment length polymorphism (RFLP) phylotypes (representing 82-88% of clone libraries) from eutrophic soils clustered with fatty acid oxidizing Syntrophomonas spp. The four dominant RFLP phylotypes (representing 11-24%) from microcosms containing soils from low nutrient regions were sequenced, and clustered with micro-organisms having the potential for fermentative and syntrophic metabolism. Archaeal 16S rRNA sequence analysis showed that methanogens from eutrophic regions were from diverse families, including Methanomicrobiaceae, Methanosarcinaceae, and Methanocorpusculaceae, but clone libraries from low nutrient soils revealed only members of Methanosarcinaceae. CONCLUSIONS These findings indicate that syntroph-methanogen consortia differed with nutrient levels in a freshwater marsh. SIGNIFICANCE AND IMPACT OF THE STUDY This is one of few studies addressing the distribution of fatty acid consuming-hydrogen producing bacteria (syntrophs) and their methanogenic partners in wetland soils, and the effects of eutrophication on the ecology these groups.
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Kamal A, Devaiah V, Shankaraiah N, Reddy K. A Polymer-Assisted Solution-Phase Strategy for the Synthesis of Fused [2,1-b]Quinazolinones and the Preparation of Optically Active Vasicinone. Synlett 2006. [DOI: 10.1055/s-2006-951482] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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141
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142
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Das B, Reddy K, Ramu R, Thirupathi P, Ravikanth B. Iodine as an Efficient Catalyst for One-Pot Multicomponent Synthesis of β-Acetamido Ketones. Synlett 2006. [DOI: 10.1055/s-2006-944208] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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143
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Howell CD, Jeffers LS, Cassidy W, Reddy KR, Hu S, Lee JS. Peginterferon alfa-2a and ribavirin for chronic hepatitis C genotype 1 infections in black patients: safety, tolerability and impact on sustained virologic response. J Viral Hepat 2006; 13:371-6. [PMID: 16842439 DOI: 10.1111/j.1365-2893.2005.00697.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Abstract
HCV infections are two-times more prevalent in black Americans than in whites. We previously reported that treatment with peginterferon alfa-2a plus ribavirin produced a sustained virologic response (SVR) rate of 26% in blacks, a lower efficacy compared with the SVR in whites. Here we detail the safety profile of peginterferon alfa-2a plus ribavirin and the relationship between treatment adherence, defined by cumulative drug exposure, and SVR in 78 black patients infected with HCV genotype 1. Sixty-two (79%) patients completed 48 weeks of combination treatment. Peginterferon alfa-2a dose was modified for neutropenia in 36 patients (46%), whereas ribavirin dose was modified due to anemia in 31 patients (40%). The SVR rate was related to medication exposure, based on the percentage of the planned doses of peginterferon and ribavirin that the patients received. The SVR rates were 33, 25 and 0% in patients who received >80, 61-80 and <or=60% of the planned peginterferon, respectively. The SVR rates were 28, 33 and 18% in patients who received >80, 61-80 and <or=60% of the planned ribavirin. The SVR rate was 29% (11 of 38) in patients who received >80% of the total planned doses of both peginterferon and ribavirin and 7% (1 of 14) in patients who received <or=80% of both medicines. The SVR was 30% in patients who received >60% exposure to both, and 0% in patients with <or=60% exposure. In conclusion, peginterferon alfa-2a plus ribavirin demonstrated good safety and tolerability profiles in blacks infected with HCV genotype 1. Adherence to at least >60% of the planned peginterferon alfa-2a and ribavirin doses for 48 weeks was associated with a greater SVR in black patients with HCV genotype 1 infections.
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Corstanje R, Grunwald S, Reddy KR, Osborne TZ, Newman S. Assessment of the spatial distribution of soil properties in a northern Everglades marsh. JOURNAL OF ENVIRONMENTAL QUALITY 2006; 35:938-49. [PMID: 16641332 DOI: 10.2134/jeq2005.0255] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Florida Everglades restoration plans are aimed at maintaining and restoring characteristic landscape features such as soil, vegetation, and hydrologic patterns. This study presents the results from an exhaustive spatial sampling of key soil properties in Water Conservation Area 1 (WCA 1), which is part of the northern Everglades. Three soil strata were sampled: floc, upper 0- to 10-cm soil layer, and 10- to 20-cm soil layer. A variety of properties were measured including bulk density (BD), loss on ignition (LOI), total phosphorus (TP), total inorganic phosphorus (TIP), total nitrogen (TN), total carbon (TC), total iron (TFe), total magnesium (TMg), total aluminum (TAl), and total calcium (TCa). Interpolated maps and model prediction uncertainties of properties were generated using geostatistical methods. We found that the uncertainty associated with spatial predictions of floc, particularly floc BD, was highest, whereas spatial predictions of soil chemical properties such as soil Ca were more accurate. The resultant spatial patterns for these soil properties identified three predominant features in WCA 1: (i) a north to south gradient in soil properties associated with the predominant hydrological gradient, (ii) areas of considerable soil nutrient enrichment along the western canal of WCA 1, and (iii) areas of considerable Fe enrichment along the eastern canal. By using geostatistical techniques we were able to describe the spatial dynamics of soil variables and express these predictions with an acceptable level of uncertainty.
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Mohan S, Reddy K, Iqbal J, Bhuniya D, Das S. Synthesis and Evaluation of Hypolipidemic Properties of some Novel Derivatives of Thieno Oxazine and 5-Hydroxyindole-2-Carboxylic Acid. LETT DRUG DES DISCOV 2006. [DOI: 10.2174/157018006776287014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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146
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Kantam M, Reddy K, Rajgopal K. Copper(II)-Promoted Regioselective Synthesis of 1,4-Disubstituted 1,2,3-Triazoles in Water. Synlett 2006. [DOI: 10.1055/s-2006-933134] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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147
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Grunwald S, Corstanje R, Weinrich BE, Reddy KR. Spatial patterns of labile forms of phosphorus in a subtropical wetland. JOURNAL OF ENVIRONMENTAL QUALITY 2006; 35:378-89. [PMID: 16397113 DOI: 10.2134/jeq2005.0042] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Phosphorus (P) has been identified as the key constituent defining wetland productivity, structure, and function. Our goal was to investigate the spatial patterns of total P and three labile forms of P (labile organic, inorganic, and microbial biomass P) across a subtropical wetland located in east-central Florida, the Blue Cypress Marsh Conservation Area (BCMCA), and link spatial patterns to ecosystem processes. The wetland received a continual input of nutrients primarily from the south and intermittently from the west and east, respectively, which ceased in the mid-1990s. Since then the marsh system has been undergoing natural succession. We used (i) ordinary kriging to characterize the spatial patterns of total P and labile P forms across the wetland, (ii) local, moving spatial correlations to investigate relationships between total P and labile P forms, and (iii) a clustering technique to link the identified spatial patterns to biogeochemical processes. The spatially explicit analyses revealed patterns of total P and labile P forms as well as changing relationships between variables across the marsh. We were able to distinguish P-enriched areas from unaffected ("natural") areas and intermediate zones that are currently undergoing change as P is mobilized and translocated. We also identified areas that are at risk, showing a shift toward a more P-enriched status. Our results improve our understanding of P and its labile components within a spatially explicit context.
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Somayaji HS, Hassan ANA, Reddy K, Heatley FW. Bilateral gluteal compartment syndrome after total hip arthroplasty under epidural anesthesia. J Arthroplasty 2005; 20:1081-3. [PMID: 16376268 DOI: 10.1016/j.arth.2005.02.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2004] [Revised: 09/21/2004] [Accepted: 02/03/2005] [Indexed: 02/01/2023] Open
Abstract
The gluteal compartment syndrome is uncommon and is discussed in only a few published case reports. The simultaneous bilateral gluteal compartment syndrome is exceptionally rare and is tackled in only 4 case reports to date. We report a case of bilateral gluteal compartment syndrome after total hip arthroplasty under epidural anesthesia and discuss its management.
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Kakani VG, Reddy KR, Koti S, Wallace TP, Prasad PVV, Reddy VR, Zhao D. Differences in in vitro pollen germination and pollen tube growth of cotton cultivars in response to high temperature. ANNALS OF BOTANY 2005; 96:59-67. [PMID: 15851397 PMCID: PMC4246808 DOI: 10.1093/aob/mci149] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2004] [Revised: 01/27/2005] [Accepted: 02/28/2005] [Indexed: 05/20/2023]
Abstract
BACKGROUND AND AIMS High-temperature environments with >30 degrees C during flowering reduce boll retention and yield in cotton. Therefore, identification of cotton cultivars with high-temperature tolerance would be beneficial in both current and future climates. * METHODS Response to temperature (10-45 degrees C at 5 degrees C intervals) of pollen germination and pollen tube growth was quantified, and their relationship to cell membrane thermostability was studied in 12 cultivars. A principal component analysis was carried out to classify the genotypes for temperature tolerance. * KEY RESULTS Pollen germination and pollen tube length of the cultivars ranged from 20 to 60 % and 411 to 903 microm, respectively. A modified bilinear model best described the response to temperature of pollen germination and pollen tube length. Cultivar variation existed for cardinal temperatures (T(min), T(opt) and T(max)) of pollen germination percentage and pollen tube growth. Mean cardinal temperatures calculated from the bilinear model for the 12 cultivars were 15.0, 31.8 and 43.3 degrees C for pollen germination and 11.9, 28.6 and 42.9 degrees C for pollen tube length. No significant correlations were found between pollen parameters and leaf membrane thermostability. Cultivars were classified into four groups based on principal component analysis. * CONCLUSIONS Based on principal component analysis, it is concluded that higher pollen germination percentages and longer pollen tubes under optimum conditions and with optimum temperatures above 32 degrees C for pollen germination would indicate tolerance to high temperature.
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Reddy KR, Rajesh PK, Krishnan M, Sekar U. Antibiotic Susceptibility Pattern and Plasmid Profile of Multidrug Resistant Salmonella typhi. Indian J Med Microbiol 2005. [DOI: 10.1016/s0255-0857(21)02603-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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