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Full-Text Articles in Life Sciences

P. Falciparum Cg2, Linked To Chloroquine Resistance, Does Not Resemble Na+/H+ Exchangers, Thomas E. Wellems, John C. Wootton, Hisashi Fujioka, Xin-Zhuan Su, Roland Cooper, Dror Baruch, David A. Frock Aug 1998

P. Falciparum Cg2, Linked To Chloroquine Resistance, Does Not Resemble Na+/H+ Exchangers, Thomas E. Wellems, John C. Wootton, Hisashi Fujioka, Xin-Zhuan Su, Roland Cooper, Dror Baruch, David A. Frock

Roland A. Cooper

Understanding the molecular basis for chloroquine resistance in Plasmodium falciparum will provide important support for the development of new therapies and prophylactic measures against malaria. Complementary genetic and biochemical investigations should discriminate among current theories and pinpoint the functional determinants of resistance. With this in mind Sanchez et al. 1998 have proposed that the P. falciparum cg2 gene, linked by Su et al. 1997 to chloroquine resistance, may encode a sodium/hydrogen exchanger (NHE) responsible for drug transport. Here, we present evidence against this proposal. Detailed reanalysis of the CG2 sequence fails to support the claims for significant similarity to functional …


The Use Of Myth And Mysticism In Michael Murphy’S Golf In The Kingdom, Don Morrow Jun 1998

The Use Of Myth And Mysticism In Michael Murphy’S Golf In The Kingdom, Don Morrow

Donald Morrow

No abstract provided.


Virtual Voices From A Superclass: Emails In Exhaustion And Exhilaration, Don Morrow May 1998

Virtual Voices From A Superclass: Emails In Exhaustion And Exhilaration, Don Morrow

Donald Morrow

No abstract provided.


Carbon Dioxide Assimilation Efficiency Of Maize Leaves Under Nitrogen Stress At Different Stages Of Plant Development, John Settimi, Jerry Maranville Mar 1998

Carbon Dioxide Assimilation Efficiency Of Maize Leaves Under Nitrogen Stress At Different Stages Of Plant Development, John Settimi, Jerry Maranville

John R. Settimi

Sub-optimal nitrogen (N) affects the N-rich carbon dioxide (CO2) assimilation enzymes which can limit maize (Zea mays) production. The status of the carboxylation system is closely correlated to the Assimilation Efficiency Index (AEI) which is the initial slope of the CO2 assimilation rate versus intercellular leaf CO2 concentrations. Experiments were undertaken to ascertain the effect of soil N nutrition on the AEI, determine genotypic variability for AEI under N-deficiency, determine how leaf and plant development affect treatment differences, and examine correlations between the AEI and plant development. Studies were conducted in the field and greenhouse on five maize genotypes on …


Fractal Analysis For Morphological Description Of Corn Roots Under Nitrogen Stress, John Settimi, Bahman Eghbal, Jerry Maranville, Anne Parkhurst Feb 1998

Fractal Analysis For Morphological Description Of Corn Roots Under Nitrogen Stress, John Settimi, Bahman Eghbal, Jerry Maranville, Anne Parkhurst

John R. Settimi

A means of quantification of plant root branching, specifically under stress, is of importance for evaluating the contribution of plant roots to water and nutrient uptake and subsequently plant growth. An experiment was conducted to describe the morphology of corn (Zea mays L.) root systems using fractal analysis and also to determine if a roots fractal dimension (D) is altered by N stress. Corn genotypes (B73 ✕ LHI05 and N74 ✕ Mo17) were planted in peg boxes, 1.2 m long, 1.2 m deep, and 0.05 m wide filled with 20:80 soil to sand mixture and were grown with N rates …


Food Ingredients: The Lure Of Convenience Amplifies Sales, Jack Marr Feb 1998

Food Ingredients: The Lure Of Convenience Amplifies Sales, Jack Marr

Jack Marr

U.S. exporters stand to benefit from a growing market for convenience foods and improve distribution networks for all industry sectors.


Fate Of Seasonal, Terrestrial Nutrient Inputs To A Shallow Seagrass Dominated Embayment, Kathryn Mcmahon, D Walker Dec 1997

Fate Of Seasonal, Terrestrial Nutrient Inputs To A Shallow Seagrass Dominated Embayment, Kathryn Mcmahon, D Walker

Kathryn McMahon

No abstract provided.


Host-Plant Associations And Specificity Among Cynipid Gall-Inducing Wasps Of Eastern Usa, Warren Abrahamson, G. Melika, R, Scrafford, G. Csoka Dec 1997

Host-Plant Associations And Specificity Among Cynipid Gall-Inducing Wasps Of Eastern Usa, Warren Abrahamson, G. Melika, R, Scrafford, G. Csoka

Warren G. Abrahamson, II

No abstract provided.


Canadian Health, Donald Morrow Dec 1997

Canadian Health, Donald Morrow

Donald Morrow

No abstract provided.


The Subspecies Of Cuora Galbinifrons Bourret, 1939 (Reptilia: Testudines: Bataguridae), Edgar Lehr, Uwe Fritz, Fritz Obst Dec 1997

The Subspecies Of Cuora Galbinifrons Bourret, 1939 (Reptilia: Testudines: Bataguridae), Edgar Lehr, Uwe Fritz, Fritz Obst

Edgar Lehr

(1) C. g. galbinifrons BOURRET, 1939, distributed in North Vietnam (Tonkin) and adjacent southern China, is characterized by its flat and elongated shell and a mainly or entirely black plastron. The carapace bears a wide, anteriorly forked dark brown median band and lacks a solid dark lateral band. The soft parts are sometimes intensely reddish coloured. (2) C. g. bourreti OBST & REIMANN, 1994, occurs in Central Vietnam (Annam, except the southernmost part), and the neighbouring regions of Laos and Cambodia. It is distinguished from the nominotypical subspecies by its more domed, rounder shell, a plastral pattern consisting of black …


Water Uptake And Structural Plasticity Along Roots Of A Desert Succulent During Prolonged Drought, Gretchen North, P. Nobel Dec 1997

Water Uptake And Structural Plasticity Along Roots Of A Desert Succulent During Prolonged Drought, Gretchen North, P. Nobel

Gretchen North

No abstract provided.