Futterverbrauch und Wachstum der Mastschweine     

Joel Axelsson 《Zeitschrift für Tierzüchtung und Züchtungsbiologie》1943,55(2-3):143-155

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A survey of Lolium rigidum populations in citrus orchards: Factors explaining infestation levels          下载免费PDF全文

Valentina Atanackovic  Alejandro Juárez‐Escario  Jordi Recasens  Joel Torra 《Weed Biology and Management》2015,15(3):122-131

The presence of herbicide‐resistant Lolium rigidum in Mediterranean (Spanish) citrus orchards was reported in 2005 and it poses a serious threat to crop management. The main objective of this research was to investigate which components could be responsible for the persistence of annual ryegrass populations in Mediterranean mandarin and orange orchards. This is the first study regarding L. rigidum populations in Mediterranean citrus orchards. Surveys were conducted in 55 commercial citrus orchards in eastern Spain in 2013 by interviewing technicians who were working in cooperatives about crop management. The level of infestation by L. rigidum and the presence of harvester ants (Messor barbarus) then were estimated in the same orchards. The variables were subjected to a two‐dimensional analysis and both univariate and multivariate logistic regression models were fitted for each of the three L. rigidum density levels that had been established. The multivariate models showed the significant factors that were associated with various L. rigidum densities: (i) at a low density, the herbicides that were applied, the number of applications in 2013 and the type of irrigation (flood or drip); (ii) at a medium density, the presence of harvester ants; and (iii) at a high density, the herbicides that were applied in 2013. The results indicated that drip irrigation and one application of glyphosate mixed with other herbicides (or herbicides other than glyphosate) were associated with a lower L. rigidum density. The alternative management options that are presented here should help farmers to reduce weed problems in Mediterranean citrus orchards. Future research is required to better understand the presence of herbicide‐resistant populations, as well as the possible beneficial presence of granivorous ant species.  相似文献   

Are Changes in Species Composition on Central North Dakota Rangelands Due to Non-Use Management?     

Shawn DeKeyser  Gary Clambey  Kelly Krabbenhoft  Joel Ostendorf 《Herpetological Monographs》2009,31(6):16-19

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Phenylalanine ammonia lyase activity in chilli CM-334 infected by Phytophthora capsici and Nacobbus aberrans     

Damaris Godinez-Vidal  Mario Rocha-Sosa  Edgar B. Sepúlveda-García  Joel Lara-Reyna  Reyna Rojas-Martínez  Emma Zavaleta-Mejía 《European journal of plant pathology / European Foundation for Plant Pathology》2008,120(3):299-303

We tested the hypothesis that PAL activity in chilli plants CM-334 inoculated with Nacobbus aberrans (Na) alone or in combination with Phytophthora capsici (Pc), is lower than in those inoculated only with Pc. At 21 days after nematode inoculation, inoculated plants showed a significant (P < 0.01) reduction of 48% in PAL activity compared to those non-inoculated in two separate experiments. In two other tests, where plants were inoculated with the oomycete 21 days after inoculation with the nematode, PAL activity at 2, 4, 6, 8 and 24 h after inoculation with Pc was significantly higher (Tukey, P < 0.01) in plants inoculated only with Pc than in plants inoculated only with Na or both pathogens (Na+Pc).  相似文献   

Multilobular tumor of bone in the mandible of a dog     

Eubanks DL  Ray JD  Bushby PA  Anderson C 《Journal of veterinary dentistry》2010,27(3):163-170

An 8-year-old Siberian husky dog was presented for a mass involving the rostral mandible. Intraoral radiographs demonstrated diffusely irregular bone and displacement of all mandibular incisor teeth. The mass was diagnosed as a grade I multilobular tumor of bone based on incisional biopsy. A bilateral rostral mandibulectomy was performed with tumor negative margins. Oral examination at 14-months following surgery indicated normal healing with minimal side effects and no evidence of tumor recurrence.  相似文献   

An Introduction to the Special Issue on Ecological Sites     

Brandon T. Bestelmeyer  Joel R. Brown 《Herpetological Monographs》2010,32(6):3-4

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Imazapyr seed dressings for Striga control on acetolactate synthase target-site resistant maize     

Fred K. Kanampiu  Joel K. Ransom  Jonathan Gressel   《Crop Protection》2001,20(10):885-895

High herbicide levels can be localized on or near seed of acetolactate synthase (ALS) resistant maize (Zea mays). The magnesium salt of imazapyr was optimal for seed dressings (drenching, priming, and coating), for preventing field damage from parasitic Striga hermonthica (witchweed) in three seasons. Striga emerged on untreated maize from 6 to 12 weeks after planting. There was almost no Striga emergence for 3 months on imazapyr-dressed homozygous ALS-R 3245IR maize seeds. Occasional Striga that emerged and flowered formed no seed by harvest. Dust or polyvinylpyrrolidone adhesive coatings were safer in maize and as effective in Striga control as priming. Seed dressing coupled with pulling Striga escapes reduces infestation and can be used to deplete the Striga seed bank until genetic crop resistance becomes available.  相似文献   

Access to food source and food source use are associated with healthy and unhealthy food-purchasing behaviours among low-income African-American adults in Baltimore City     

D'Angelo H  Suratkar S  Song HJ  Stauffer E  Gittelsohn J 《Public health nutrition》2011,14(9):1632-1639

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Linking farmers to community stores to increase consumption of local produce: a case study of the Navajo Nation     

Setala A  Gittelsohn J  Speakman K  Oski J  Martin T  Moore R  Tohannie M  Bleich SN 《Public health nutrition》2011,14(9):1658-1662

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A Study of Combining Elastin in the Chitosan Electrospinning to Increase the Mechanical Strength and Bioactivity     

Hengjie Su  Tomoko Fujiwara  Joel D. Bumgardner 《Marine drugs》2021,19(3)

While electrospun chitosan membranes modified to retain nanofibrous morphology have shown promise for use in guided bone regeneration applications in in vitro and in vivo studies, their mechanical tear strengths are lower than commercial collagen membranes. Elastin, a natural component of the extracellular matrix, is a protein with extensive elastic property. This work examined the incorporation of elastin into electrospun chitosan membranes to improve their mechanical tear strengths and to further mimic the native extracellular composition for guided bone regeneration (GBR) applications. In this work, hydrolyzed elastin (ES12, Elastin Products Company, USA) was added to a chitosan spinning solution from 0 to 4 wt% of chitosan. The chitosan–elastin (CE) membranes were examined for fiber morphology using SEM, hydrophobicity using water contact angle measurements, the mechanical tear strength under simulated surgical tacking, and compositions using Fourier-transform infrared spectroscopy (FTIR) and post-spinning protein extraction. In vitro experiments were conducted to evaluate the degradation in a lysozyme solution based on the mass loss and growth of fibroblastic cells. Chitosan membranes with elastin showed significantly thicker fiber diameters, lower water contact angles, up to 33% faster degradation rates, and up to seven times higher mechanical strengths than the chitosan membrane. The FTIR spectra showed stronger amide peaks at 1535 cm⁻¹ and 1655 cm⁻¹ in membranes with higher concentrated elastin, indicating the incorporation of elastin into electrospun fibers. The bicinchoninic acid (BCA) assay demonstrated an increase in protein concentration in proportion to the amount of elastin added to the CE membranes. In addition, all the CE membranes showed in vitro biocompatibility with the fibroblasts.  相似文献