Third International Symposium on Biomolecular Archaeology. Trail of mare's milk leads to first tamed horses     

Travis J 《Science (New York, N.Y.)》2008,322(5900):368

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Wilms tumor suppressor WTX negatively regulates WNT/beta-catenin signaling     

Major MB  Camp ND  Berndt JD  Yi X  Goldenberg SJ  Hubbert C  Biechele TL  Gingras AC  Zheng N  Maccoss MJ  Angers S  Moon RT 《Science (New York, N.Y.)》2007,316(5827):1043-1046

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Third World: S(ave) O(ur) S(heep)!     

Travis J 《Science (New York, N.Y.)》1992,255(5045):678

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Computers: minis and maxis     

Pinkerton T  Travis L 《Science (New York, N.Y.)》1976,194(4262):257-259

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Shade coffee in Hawai‘i – Exploring some aspects of quality,growth, yield,and nutrition     

Shawn Steiman  Travis Idol  H.C. Bittenbender  Loren Gautz 《Scientia Horticulturae》2011

In a harsh (Kunia) and an ideal (Kona) growing region of Hawai‘i, sun grown Coffea arabica L. was compared to coffee shaded with varying degrees of black and aluminized shade cloth, macadamia trees, and a novel, spray-on shade composed mostly of kaolin. Shading did not appreciably affect organoleptic quality. Shading resulted in statistically different yields in the macadamia (16% of sun) and kaolin (199% of sun) treatments in the second year compared to full sun treatments in their respective locations, although a negative, linear trend was observed with increased shading. The lack of significant differences in yields between the shade cloth and sun treatments was likely a result of large yield variation among replicates. Bean sizes differed little between shade treatments and the percentage of defects and broken beans were generally not significantly different among the treatments in Kunia. Kona bean sizes and characteristics were not different. Shading reduced surface leaf temperatures and increased specific leaf area but generally did not affect lateral nodal growth. Leaf nutrient concentration differed between treatments.  相似文献   

Addition of Leucaena-KX2 mulch in a shaded coffee agroforestry system increases both stable and labile soil C fractions     

Adel Youkhana  Travis Idol 《Soil biology & biochemistry》2011,43(5):961-966

Agroforestry systems have the potential to increase sequestration of atmospheric carbon dioxide (CO₂) as soil organic carbon (SOC) because of the increased rates of organic matter addition and retention. However, few studies have characterized the relative stability of sequestered SOC in soil. We characterized SOC storage in aggregate size and chemical stability classes to estimate the relative stability of SOC pools after the addition of Leucaena-KX2 pruning residues (mulch) from 2006 to 2008 in a shaded coffee agroforestry system in Hawaii. Soil samples were separated by microaggregate isolation, density flotation and dispersion, and acid hydrolysis, resulting in five distinct fractions that differed in relative stability: coarse particulate organic matter (POM), fine POM, microaggregate-protected POM, silt + clay hydrolyzable soil organic matter (SOM), and silt + clay non-hydrolyzable SOM. With mulch addition, the fine POM fraction increased. There was also a shift in the proportion of SOC to more stable silt + clay fractions. In the absence of mulch there was no significant change in SOC fractions. Given that the turnover time of SOC in silt + clay fractions is on the order of decades to centuries, the potential benefits of active shade management and mulching compensate for the loss of C sequestration in tree biomass from pollarding.  相似文献   

Mercury Concentrations in Largemouth BASS (Micropterus Salmoides) from Five South Carolina Reservoirs     

John D. Peles  Travis C. Glenn  Heather A. Brant  Angela K. Wall  Charles H. Jagoe 《Water, air, and soil pollution》2006,173(1-4):151-162

Mercury concentrations in largemouth bass (Micropterus salmoides) bass were compared among five reservoirs in South Carolina. Three of these reservoirs (Lake Russell, Lake Thurmond, and Lake Marion) are accessible to the public and two (L-Lake and Par Pond) are located on the U.S. Department of Energy's Savannah River Site (SRS), which is closed to public access. Age-adjusted mercury concentrations were significantly higher in SRS bass compared to the offsite reservoirs. In addition, mercury concentrations were significantly higher in bass from Par Pond compared to L-Lake and in bass from Lakes Russell and Thurmond compared to Lake Marion. No mercury concentrations in excess of the U.S. Food and Drug Administration action level (1.0 mg?kg^?1) were found in any bass from the public-accessible reservoirs. However, the majority of fish from these reservoirs had mercury concentrations that fall into or exceed the U.S. Environmental Protection Agency consumption category of “no more than one per week". In addition, most fish from these reservoirs had mercury levels in excess of those believed to be detrimental to sensitive avian species.  相似文献   

Phototropic Leaflet Reorientation in Alfalfa Germplasm Selected for Leaf Color and Size     

R. L. Travis  R. Reed 《Journal of Agronomy and Crop Science》1990,165(4):281-286

Solar tracking has been described in several agronomic and wild species, yet variation within a given species has not been reported. To address that issue, photoperiod leaflet reorientation in response to vectorial light was measured in three alfalfa ( Medicago sativa L.) germplasm pools selected from the cultivar Ladak 65. Dark-leaf germplasm responded to all photosynthetic photon flux densities (PPFD) (100 to 700 μmol/m²/s) with no detectable lag period. Following a 24-h dark treatment only high PPFD (600 to 700μmol/m²/s) elicited reorientation. Pale-leaf germplasm responded to intermediate (300 to 400 μmol/m²/s) and high PPFD in a similar manner; however, the low (100-125μmol/m²/s) PPFD treatment had little effect on reorientation. The 24-h dark treatment decreased reorientation at all PPFD. Small-leaf germplasm responded equally to all PPFD and was not affected by the 24-h dark treatment. The results suggest that available energy levels may influence the reorientation response. Carbonyl cyanide m -chlorophenylhydrazone, an inhibitor of photophosphorylation, and 3-(3,4-dichlorophenyl)-1,1-dimethylurea, an inhibitor of non-cyclic photosynthetic electron transport, reduced reorientation only in the pale-leaf type. These results suggest that stored energy reserves were adequate to maintain leaflet reorientation in the absence of photosynthesis in all but the pale-leaf germplasm. In that germplasm photosynthetically generated energy may be required to support reorientation.  相似文献   

Effect of a low zinc diet on the ewe during pregnancy and lactation     

J Apgar  H F Travis 《Journal of animal science》1979,48(5):1234-1238

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Gene expression profiling of avian macrophage activation     

Bliss TW  Dohms JE  Emara MG  Keeler CL 《Veterinary immunology and immunopathology》2005,105(3-4):289-299

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