|
|
|
| Registros recuperados: 601 | |
|
|
| Lentz, R.D.; Ippolito, J.A.; Spokas, K.A.. |
| Aluminum-based water treatment residuals (Al-WTR) have a strong affinity to sorb phosphorus. In a proof-of-concept greenhouse column study, Al-WTR was surface-applied at 0, 62, 124, and 248 Mg/ha to 15 cm of soil on top of 46 cm of sand; Al-WTR rates were estimated to capture 0, 10, 20, and 40 years of phosphorus from an urban watershed entering an engineered wetland in Boise, Idaho, USA. Creeping red fescue (Festuca rubra) was established in all columns; one set of columns received no Al-WTR or plants. After plant establishment, once per week over a 12-week period, ~1.0 pore volumes of ~0.20 mg phosphorus/L was added to each column. Infiltration rates were measured, leachate was collected and analyzed for soluble phosphorus, and fescue yield,... |
| Tipo: Article |
Palavras-chave: Chemistry; Soil quality. |
| Ano: 2015 |
URL: http://eprints.nwisrl.ars.usda.gov/1592/1/1550.pdf |
| |
|
| |
|
| |
|
| |
|
|
| Sierra Rayne; Giuseppe Mazza. |
| Sumac is the common name for a genus (Rhus) that contains over 250 individual species of flowering plants in the family Anacardiaceae. These plants are found in temperate and tropical regions worldwide, often grow in areas of marginal agricultural capacity, and have a long history of use by indigenous peoples for medicinal and other uses. The research efforts on sumac extracts to date indicate a promising potential for this plant family to provide renewable bioproducts with the following reported desirable bioactivities: antifibrogenic, antifungal, antiinflammatory, antimalarial, antimicrobial, antimutagenic, antioxidant, antithrombin, antitumorigenic, antiviral, cytotoxic, hypoglycaemic, and leukopenic. As well, the bioactive components can be extracted... |
| Tipo: Manuscript |
Palavras-chave: Chemistry; Pharmacology; Plant Biology. |
| Ano: 2007 |
URL: http://precedings.nature.com/documents/631/version/1 |
| |
|
|
| Arun Chauhan; Swaleha Zubair; Qamar Zia; Saba Tufail; Asif Sherwani; Mohammad Sajid; Mohammad Owais. |
| Biomimetic nano-assembly formation offers a convenient and bio friendly approach to fabricate complex structures from simple components with sub-nanometer precision. Recently, extract from cells of microorganism/plant origin have emerged as a simple and viable route for the synthesis of metal and inorganic material nano-particles. In the present study, we have extended biological synthesis of nano-particles to organic molecules, namely the anticancer agent, 5-fluorouracil (5-FU) using Aloe vera leaf extract. The formation of 5-FU nano- particles was assessed by UV, FT-IR and fluorescence spectroscopic techniques. Transmission electron microscopy and atomic force microscopic techniques confirmed nano-size of the synthesized particles. Importantly, the... |
| Tipo: Manuscript |
Palavras-chave: Biotechnology; Cancer; Chemistry; Molecular Cell Biology. |
| Ano: 2011 |
URL: http://precedings.nature.com/documents/6182/version/1 |
| |
|
| |
|
|
| Regalado, E.L.; Laguna, A.; Mendiola, J.; Thomas, O.P.; Nogueiras, C.. |
| Bioguided fractionation of Agelas cerebrum crude extract resulted in isolation of four bromopyrrole and four bromopyrrole aminoimidazole alkaloids, identified as 5-bromopyrrole-2-carboxylic acid (1), 4-bromopyrrole-2-carboxylic acid (2), 3,4-bromopyrrole-2-carboxylic acid (3), 4,5-bromopyrrole-2-carboxylic acid (4), oroidin (5), bromoageliferin (6), dibromoageliferin (7) and dibromosceptrin (8) on the basis of spectroscopic data analyses (UV, IR, HRMS, 1D and 2D NMR) and comparison with literature data. This is the first report of compounds 2 and 3 in a marine sponge belonging to the Agelas genus and the first evidence of the presence of 1 from a natural source. |
| Tipo: Journal Contribution |
Palavras-chave: Alkaloids; Sponges; Chemistry; Chemistry; Alkaloids; Sponges; Http://aims.fao.org/aos/agrovoc/c_1522; Http://aims.fao.org/aos/agrovoc/c_269; Http://aims.fao.org/aos/agrovoc/c_7321. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/3862 |
| |
|
| |
|
| |
|
|
| Martínez Canals, M.; Montalvo, J.F.; Miravet, M.E.; Lugioyo, M.; Loza, S.; Pérez, R.; García, I.; Rodríguez, A.; Cesar, M.E.; Esponda, S.; Sánchez, M.; Delgado, V.. |
| The anthropogenic affectation was evaluated on the coast N of the Gulf of Batabanó in May 2003 (corresponding to the provinces of Matanzas and Havana), in areas located in the line of the coast. The results were compared with the historical information of the sector. In the coast N and the Ensenada of the Broa, the parameters oxygen saturation, DBO5 and DQO showed characteristic high values of eutrofication. The biggest contribution in the Cianoficies was in the near coastal areas to sources of organic contamination. In the case of the nutrients they show specific data of mesothrofic waters with tendency to the eutrofization and the silts presented a high affectation for toxic metals. The area near to Guanímar is distinguished to present conditions of... |
| Tipo: Proceedings Paper |
Palavras-chave: Phytoplankton; Water quality; Primary production; Chemistry; Environmental monitoring; Phytoplankton; Water quality; Primary production; Chemistry; Environmental monitoring; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_16061; Http://aims.fao.org/aos/agrovoc/c_34329; Http://aims.fao.org/aos/agrovoc/c_1522; Http://aims.fao.org/aos/agrovoc/c_37876. |
| Ano: 2006 |
URL: http://hdl.handle.net/1834/2172 |
| |
|
|
| I. C. Baianu. |
| A critical overview of recent clinical trials in cancer is presented focused on signaling pathways blockers or inhibitors with a view to developing successful clinical trials employing personalized cancer therapies. Rational, pharmacogenomic strategies in cancer trials should be adopted that include specific molecular targeting based on adequate data for, and detailed modeling of, cancer cell genomes, modifications of cancer signaling pathways and epigenetic mechanisms. Novel translational oncogenomics research is rapidly expanding through the application of highly sensitive and specific advanced technology, research findings and computational tools and complex models to both pharmaceutical and clinical problems. Multiple sample analyses from several... |
| Tipo: Manuscript |
Palavras-chave: Biotechnology; Cancer; Chemistry; Genetics & Genomics; Immunology; Molecular Cell Biology; Pharmacology; Bioinformatics. |
| Ano: 2012 |
URL: http://precedings.nature.com/documents/7046/version/1 |
| |
|
| |
|
|
| Sierra Rayne. |
| Increasing concentrations of carbon dioxide (CO2) in the atmosphere have stimulated significant global research and development efforts regarding the reduction in CO2 emissions from all point and non-point sources. In addition to technologies that do not use carbon feedstocks or which capture and "permanently" store CO2 (i.e., sequestration), there is considerable worldwide interest among the academic, industrial, and government communities regarding methods for dissociating waste stream carbon dioxide molecules into their constituent carbon and oxygen ("CO2 splitting") atoms as a final "end-of-pipe" treatment option. The splitting of carbon dioxide has also been actively discussed and researched in the... |
| Tipo: Manuscript |
Palavras-chave: Chemistry; Earth & Environment. |
| Ano: 2008 |
URL: http://precedings.nature.com/documents/1741/version/1 |
| |
|
|
| Rita Khanna; Mohammad Ikram-ul Haq; Veena Sahajwalla. |
| Seismological and geochemical observations have revealed a complex structure for the earth's core-mantle boundary (CMB) region, with lateral and chemical heterogeneities. The presence of higher than expected concentrations of siderophile elements (Ni, Co, Pt etc) in the earth's mantle, iron enrichment of the lower mantle relative to the upper mantle, and a possible carbon flux from the core suggest the possibility of continual long-term exchange of materials between the core and the mantle. The chemical interactions of molten iron with complex mantle oxides and diffusion have been postulated as key mechanisms. A number of studies have been carried out on the reduction reactions taking into account the extreme conditions of... |
| Tipo: Manuscript |
Palavras-chave: Chemistry; Earth & Environment. |
| Ano: 2008 |
URL: http://precedings.nature.com/documents/2336/version/1 |
| |
|
|
| Keisuke Saito; Hiroshi Ishikita. |
| Photosystem I (PSI) and II (PSII) possess chlorophyll pairs P~A~/P~B~ and P~D1~/P~D2~, respectively. These chlorophylls are the primary electron donors in the light-induced electron transfer. After the electron transfer, the radical cation remains on these chlorophyll pairs, forming [P~A~/P~B~]^·+^ and [P~D1~/P~D2~]^·+^. The positive charge distributions over the two chlorophylls were reported to be 10/90-50/50 for P~A~^·+^/P~B~^·+^ [1,2] and 70/30-80/20 for P~D1~^·+^/P~D2~^·+^ [3,4]. To clarify the origin of the distributions, we calculated ratios of P~A~^·+^/P~B~^·+^ and P~D1~^·+^/P~D2~^·+^ with a quantum mechanical/molecular mechanical (QM/MM) approach and the... |
| Tipo: Poster |
Palavras-chave: Chemistry; Bioinformatics; Plant Biology. |
| Ano: 2011 |
URL: http://precedings.nature.com/documents/6486/version/1 |
| |
|
| |
|
| |
|
|
| Srilakshmi Adhyapak; Shamanna Iyengar. |
| Background: There exists a sub group of patients with uremic cardiomyopathy who experience resolution of heart failure following hemodialysis. It has been hypothesized that these patients are fluid overloaded, and following hemodialysis, show improvements in cardiac geometry and function. We wanted to study their clinical, biochemical and echocardiographic features to define any other additional characteristics.

Aim: To define characteristics of reversible systolic dysfunction.

Methods: We studied 72 patients with chronic kidney disease on hemodialysis of whom 52 presented with congestive heart failure, over a period of 190 days. We studied their echocardiographic profile and blood... |
| Tipo: Manuscript |
Palavras-chave: Chemistry; Pharmacology. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3199/version/1 |
| |
|
| |
| Registros recuperados: 601 | |
|
|
|
