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Articles 1 - 11 of 11
Full-Text Articles in Life Sciences
Mutations In Pmr5 Result In Powdery Mildew Resistance And Altered Cell Wall Composition, John P. Vogel, Ted K. Raab, Chris R. Somerville, Shauna C. Somerville
Mutations In Pmr5 Result In Powdery Mildew Resistance And Altered Cell Wall Composition, John P. Vogel, Ted K. Raab, Chris R. Somerville, Shauna C. Somerville
Ted K. Raab
Powdery mildews and other obligate biotrophic pathogens are highly adapted to their hosts and often show limited host ranges. One facet of such host specialization is likely to be penetration of the host cell wall, a major barrier to infection. A mutation in the pmr5 gene rendered Arabidopsis resistant to the powdery mildew species Erysiphe cichoracearum and Erysiphe orontii, but not to the unrelated pathogens Pseudomonas syringae or Peronospora parasitica. PMR5 belongs to a large family of plant-specific genes of unknown function. pmr5-mediated resistance did not require signaling through either the salicylic acid or jasmonic acid/ ethylene defense pathways, suggesting …
Lateral Hypothalamic Signaling Mechanisms Underlying Feeding Stimulation: Differential Contributions Of Src Family Tyrosine Kinases To Feeding Triggered Either By Nmda Injection Or By Food Deprivation, Arshad Khan, Herman H. Cheung, Elizabeth R. Gillard, Jennifer A. Palarca, Derek S. Welsbie, James W. Gurd, B. Glenn Stanley
Lateral Hypothalamic Signaling Mechanisms Underlying Feeding Stimulation: Differential Contributions Of Src Family Tyrosine Kinases To Feeding Triggered Either By Nmda Injection Or By Food Deprivation, Arshad Khan, Herman H. Cheung, Elizabeth R. Gillard, Jennifer A. Palarca, Derek S. Welsbie, James W. Gurd, B. Glenn Stanley
Arshad M. Khan, Ph.D.
No abstract provided.
Overweight In Urban, Low-Income, African American And Hispanic Children Attending Los Angeles Elementary Schools: Research Stimulating Action, Wendelin M. Slusser, William G. Cumberland, Ben L. Browdy, Donna Winham, Charlotte G. Neumann
Overweight In Urban, Low-Income, African American And Hispanic Children Attending Los Angeles Elementary Schools: Research Stimulating Action, Wendelin M. Slusser, William G. Cumberland, Ben L. Browdy, Donna Winham, Charlotte G. Neumann
Donna Winham
Objective: This study was undertaken to establish the prevalence and severity of nutritional problems among low-income children of elementary school age in the Los Angeles Unified School District (LAUSD) in order to collect baseline data to inform policy-makers. Design and methods: A cross-sectional survey of children in 14 elementary schools was conducted from January to June, 1998. Nine hundred and nineteen children were measured and interviewed. The planning, design and data analysis were carried out in collaboration with key LAUSD policy-makers. Results: More than 35% of the sample was classified as being at risk for overweight or overweight according to …
Size And Organic Content Of Eggs Of Marine Annelids, And The Underestimation Of Egg Energy Content By Dichromate Oxidation, William Jaeckle, Bruno Pernet
Size And Organic Content Of Eggs Of Marine Annelids, And The Underestimation Of Egg Energy Content By Dichromate Oxidation, William Jaeckle, Bruno Pernet
William Jaeckle
Dichromate oxidation is a simple technique that is often used to estimate the energy content of eggs in studies of marine invertebrate life histories (1). We used this method to measure the energy contents of the eggs of 12 species of marine annelids. In combination with measures of egg ash-free dry weight (AFDW), these data yielded estimates of AFDW-specific energy density that were mostly lower than the average weight-specific energy density of carbohydrates. This seemed unlikely to be correct, as invertebrate eggs typically contain little carbohydrate and instead are composed primarily of energy-dense protein and lipid (1, 2). After validating …
Food Based Approaches For A Healthy Nutrition In Africa, Mamoudou Hama Dicko
Food Based Approaches For A Healthy Nutrition In Africa, Mamoudou Hama Dicko
Pr. Mamoudou H. DICKO, PhD
The latest estimates of the FAO demonstrate the problems of the fight against hunger. These problems are manifested by the ever-increasing number of chronically undernourished people worldwide. Their numbers during the 1999-2001 period were estimated at about 840 million of which 798 million live in developing countries. Sub-Saharan Africa alone represented 198 million of those. In this part of Africa the prevalence of undernourishment ranges from 5-34%, causing growth retardation and insufficient weight gain among one third of the children under five years of age and resulting in a mortality of 5-15% among these children. Malnutrition resulting from undernourishment is …
The Effect Of Water And Nitrogen On The Response Of Sorghum Cultivars With Contrasting Nitrogen Use Efficiency, Teshome Regassa
The Effect Of Water And Nitrogen On The Response Of Sorghum Cultivars With Contrasting Nitrogen Use Efficiency, Teshome Regassa
Teshome H. Regassa
Water and nitrogen (N) are important environmental factors limiting sorghum production. Information is lacking on the combined effects of water and N for cultivars with different degrees of water and/or N stress tolerance. Sorghum cultivars known for N and water stress tolerance difference were evaluated to identify plant characteristics contributing to N use efficiency (NUE). Cultivars San Chi San and CK-60 were evaluated at Mead, NE on a Sharpsburg silty clay loam soil under water (stress and non-stress), and N (0, 40, 80, and 120 kg ha−1) rates. Experimental units were arranged in split-split plot and treatments were …
Molecular Phylogenetic Evidence For An Extracellular Cu Zn Superoxide Dismutase Gene In Insects, Joel D. Parker
Molecular Phylogenetic Evidence For An Extracellular Cu Zn Superoxide Dismutase Gene In Insects, Joel D. Parker
Joel D Parker
Representatives of three ancient gene families of the antioxidant enzyme superoxide dismutase (SOD) can be found in most metazoans. In mammals and Caenorhabditis elegans , there is at least one gene each of the cytoplasmic, mitochondrial and extracellular lineages of SOD genes. The cytoplasmic SOD was one of the first enzymes to be implicated in ageing due to its protection against damaging oxygen free radicals. In contrast to other metazoans, insects were thought to lack a gene for the extracellular SOD. We have cloned and sequenced an SOD mRNA in the ant Lasius niger that appears to belong to this …
Can The Human Brain Do Quantum Computing?, Armando F. Rocha, Eduardo Massad, Francisco B. Coutinho
Can The Human Brain Do Quantum Computing?, Armando F. Rocha, Eduardo Massad, Francisco B. Coutinho
Armando F Rocha
The electrical membrane properties have been the key issues in the understanding of the cerebral physiology for more than almost two centuries. But, molecular neurobiology has now discovered that biochemical transactions play an important role in neuronal computations. Quantum computing (QC) is becoming a reality both from the theoretical point of view as well as from practical applications. Quantum mechanics is the most accurate description at atomic level and it lies behind all chemistry that provides the basis for biology ... maybe the magic of entanglement is also crucial for life. The purpose of the present paper is to discuss …
Identification Of Snake Repellents, Larry Clark, John Shivik
Identification Of Snake Repellents, Larry Clark, John Shivik
Larry Clark
No abstract provided.
Non-Inactivating Voltage-Gated Sodium Channels In Severe Myoclonic Epilepsy Of Infancy, T. H. Rhodes, Christoph Lossin, C. Vanoye, Alfred L. George
Non-Inactivating Voltage-Gated Sodium Channels In Severe Myoclonic Epilepsy Of Infancy, T. H. Rhodes, Christoph Lossin, C. Vanoye, Alfred L. George
Christoph Lossin, Ph.D.
Mutations in SCN1A, the gene encoding the brain voltage-gated sodium channel alpha(1) subunit (Na(V)1.1), are associated with at least two forms of epilepsy, generalized epilepsy with febrile seizures plus and severe myoclonic epilepsy of infancy (SMEI). We examined the functional properties of five SMEI mutations by using whole-cell patch-clamp analysis of heterologously expressed recombinant human SCN1A. Two mutations (F902C and G1674R) rendered SCN1A channels nonfunctional, and a third allele (G1749E) exhibited minimal functional alterations. However, two mutations within or near the S4 segment of the fourth repeat domain (R1648C and F1661S) conferred significant impairments in fast inactivation, including persistent, noninactivating …
Intravenous 2-Deoxy-D-Glucose Injection Rapidly Elevates Levels Of The Phosphorylated Forms Of P44/42 Mitogen-Activated Protein Kinases (Extracellularly Regulated Kinases 1/2) In Rat Hypothalamic Parvicellular Paraventricular Neurons, Arshad Khan, Alan G. Watts
Intravenous 2-Deoxy-D-Glucose Injection Rapidly Elevates Levels Of The Phosphorylated Forms Of P44/42 Mitogen-Activated Protein Kinases (Extracellularly Regulated Kinases 1/2) In Rat Hypothalamic Parvicellular Paraventricular Neurons, Arshad Khan, Alan G. Watts
Arshad M. Khan, Ph.D.
No abstract provided.