839 research outputs found
Troubleshooting swine reproductive failure
No full text1 online resource (PDF, 5 pages)This archival publication may not reflect current scientific knowledge or recommendations. Current information available from the University of Minnesota Extension: https://www.extension.umn.edu.Evans, Lawrence; Britt, Jack; Kirkbride, Clyde; Levis, Don; Beck, Larry; Hurtgen, John P.; Singleton, Wayne L.; Swartley, Gerald R.. (1983). Troubleshooting swine reproductive failure. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/207445
Intercropping for conservation biological control of European corn borer Ostrinia nubilalis Hübner (lepidoptera: crambidae) in bell peppers
No full textThe European corn borer, Ostrinia nubilalis Hübner, is the most important insect pest of sweet peppers in New Jersey. Management of this pest has been dependent on insecticides. Numerous predators feed on the eggs and larvae of O. nubilalis and under certain conditions they can contribute high levels of biological control. Maximum control by these predators can be achieved by using selective insecticides and providing nutritional resources when prey is scarce. From 2008 to 2010, we tested the effects of bell peppers intercropped with flowering plants: dill, Anethum graveolens L.; coriander, Coriandrum sativum L.; and buckwheat, Fagopyrum escuelentum Moench on improving O. nubilalis egg predation and reducing its damage to the fruit. By placing O. nubilalis egg masses on sentinel plants, we found that the major predators in New Jersey were the coccinellid Coleomegilla maculata DeGeer, the anthocorid Orius insidiosus Say, and chrysopid larvae, Chrysoperla sp. Egg predation was negatively affected by aphid populations. Aphid populations were reduced and egg predation was enhanced in plots intercropped with flowering plants. Insecticide sprays were used to determine the compatability of a selective material, spinosad, on O. nubilalis suppression in both intercropped and non-intercropped systems. Unsprayed fruit damage was greater in non-intercropped plots with high O. nubilalis densities than intercropped plots, but not in spinosad-treated fruit. Thus spinosad may not be compatible with intercropping systems due to its toxicity to certain predators. In order to test for affects of floral provisioning on biological control, gut contents of O. insidiosus were screened for DNA from the flowers, O. nubilalis, and M. persicae. It was found that the dispersal of this predator from the flowers into the pepper crop was greatest when flowers began to senesce. However, O. nubilalis was not detected in the guts of O. insidiosus during late-June through mid-August sampling periods. Myzus persicae DNA was detcted, indicating that aphids were the primary food during and after peak aphid densities. The proportion of predators feeding on aphids was similar for intercropped and non-intercropped plots, indicating that aphids were a preferred host and that flowers did not distract O. insidiosus from feeding on aphids.M. S.Includes bibliographical referencesby Matthew Wayne Bickerto
Does Justice Have a Syntax?
No full text"Original title: Does Justice Have a Syntax? published in the Journal of Legal Education, vol. 69, no. 1 (Fall 2019); translated into Spanish by Victoria Perani. We thank the author and the Journal of Legal Education for permission to publish this article."Fil: Winter, Steven L. Universidad de Wayne State. Escuela de Leyes. Cátedra de Derecho constitucional. Detroit, Estados Unidos"Título original: Does Justice Havea Syntax?; publicado en la revista Journal of Legal Education, vol.69, nro.1 (otoño 2019); traducido al español por Victoria Perani. Agradecemos al autor y a la Revista Journal of Legal Education por permitirnos publicar el presente artículo.
Creating small opportunities with big impact in Indiana: Microfinance and small business incubator project in Fort Wayne
No full textSeveral federally sponsored programs created specifically to help small business owners and entrepreneurs exist, but are not accessible to those that have poor or no credit. Small business workshops are offered throughout the community, but have no financial means to help once they have armed their clients with the proper tools to open and run a business. This study was conducted to examine the effects of the implementation of a microlending program on low-income Small Business owners, and entrepreneurs in Fort Wayne, Indiana. CANI launched a microlending program in 2010 to address the shortage of financial capital available to existing and startup low-income small businesses. Through the observation of the design, survey questionnaires, number of loans made, small business development training workshops, and presentation to stakeholders, a number of key findings were identified. As a result, the information provided in this thesis will present those findings and other key information about the project and community. (Author Abstract)Early-Aden, S.E. (2012). Creating small opportunities with big impact in Indiana: Microfinance and small business incubator project in Fort Wayne. Retrieved from http://academicarchive.snhu.eduMaster of Science (M.S.)Community Economic DevelopmentSchool of Busines
Variation between Boars in Semen Characteristics and Fertility
No full textThe most important factor influencing the income from a livestock breeding herd is the number of offspring produced per female per year. This number varies between herds and species and is influenced by such factors as disease, nutrition, genetics, management, climate, and endocrine balance. It has been estimated that over 30% of the potential offspring from the sow are lost between ovulation and the thirtieth day of pregnancy. It would be of great economic value to reduce this loss both in terms of increased number of offspring per pregnancy and increased number of offspring per year. The sow has long been considered to be solely responsible for litter size; therefore, much of the research effort in this area has been directed toward the female. Recent studies have indicated that the incidence of fertilization failure and early embryonic mortality are due in part to some inherent abnormalities of the male germ cell. Although actual fertility tests remain the only absolute test of male fertility level, it would be of value to find some reliable, rapid and inexpensive laboratory measure of fertility in order to eliminate males of low fertility from the herd prior to the breeding season. This research was designed to study: 1. The variation of certain semen characteristics between boars and between ejaculates within boars. 2. The relationship between these semen characteristics and fecundity in the gilt
Studies on in Vitro Boar Semen Storage
No full textExperiments were conducted in a study of in vitro boar semen storage. Yorkshire boars and Yorkshire-Hampshire crossbred gilts were used and were fed a 16.0% crude protein ration. The sperm-rich fraction of all ejaculates was collected by the gloved-hand technique at a minimum of 48-hr intervals. One experiment involved separating the seminal plasma from the spermatozoa cells within 30min after ejaculation by centrifugation (550 g for 7min) followed by two washings with a glucose-bicarbonate solution. The cells were resuspended in a glucose-bicarbonate solution. The cells were resuspended in a glucose-bicarbonate solution and in glucose-bicarbonate solution plus 20% egg yolk. Percent progressive motility, oxygen consumption, pH and occurrence of secondary abnormalities were observed at 0 hr and after 72 hr of storage at 15 C. The results suggested that twice washing and resuspension of spermatozoa in yolk-glucose-bicarbonate media may increase the length of in vitro survival and reversible progressive motility as compared to the unwashed controls. However, the high incidence of secondary abnormalities occurring during the washing process limits the usefulness of this technique. Another experiment was conducted to develop an inhibitory medium and collection technique for boar semen and to study the effect of this medium on in vitro survival and fertility. Reversible motility was optimum in a medium consisting of 1.6624 g KHC03, 0.8085 g NaHC03 and 1.900 g C6Ha07•H2O (citric acid). The above dry ingredients were placed in an insulated vacuum flask. Just prior to emission of the sperm-rich fraction, distilled water (100 ml) was added and the semen was collected directly into the medium. Conception rates of 85.7, 44.4 and 55.5%, resulted from semen stored in the inhibitory medium for O, 48 and 96 hr, respectively
"Isozyme variation in ""helminthosporium-type"" species pathogenic on maize"
No full textThe population structure of three species of fungi pathogenic on Zea mays L.; Cochliobolus carbonum, C. heterostrophus, and Septosphaeria turcica were studied using isozyme analysis. Forty isolates of S. turcica were evaluated using nineteen enzyme stains. Polymorphisms were identified with aspartate aminotransferase (EC 2.6.1.1), fumarase (EC 4.2.1.2), glucose-6-phosphate dehydrogenase (EC 1.1.1.49), and mannose-6-phosphate isomerase (EC 5.3.1.8). Associated electrophoretic and virulence phenotypes were found, indicating that populations exist in S. turcica as asexually propagated clonal groups. Use of the UPGMA method to calculate overall similarity between isolates found that isolates of race 1 were more similar to race 2 than isolates of race 3.Isolates of C. carbonum were found to be polymorphic for aspartate aminotransferase, esterase (EC 3.1.1), glucose phosphate isomerase (EC 5.3.1.9), leucine aminopeptidase (EC 3.4.11), and mannitol dehydrogenase. Races of C. carbonum were found to be associated with specific electrophoretic phenotypes. Phenograms generated by the UPGMA method showed similarity between races 1 and 3, which are highly virulent on maize. Both races were less similar to isolates of race 2, a weak pathogen of maize. No isozyme polymorphisms were detected in isolates of race 0 of C. heterostrophus. One race T isolate showed polymorphisms with esterase and hexokinase.Made available in DSpace on 2011-05-07T12:12:09Z (GMT). No. of bitstreams: 2
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International Comparisons of Real Estate E-nformation on the Internet
No full textHow much information should brokers supply on a website? The Internet allows brokers to reduce the cost of providing information to potential buyers. However, brokers may risk disintermediation if they provide too much information. This paper presents a model of a broker’s choice of how much information to provide on a website. The model considers buyers’ tradeoffs between hiring a broker and gathering information on their own. It then investigates why real estate brokers in different countries provide different amounts of information on websites. Tests reveal that information provided on broker websites depends on the search cost of prospective buyers.
In vitro fertilization improves childhood growth and metabolism
No full textBACKGROUND: There is limited information regarding the long-term outcome of children born after in vitro fertilization (IVF), although an increase in rare imprinted gene disorders such as Beckwith-Wiedemann syndrome has been reported. METHODS: We recruited healthy, prepubertal children born at term after singleton pregnancy. The children in the study group were conceived using IVF with fresh embryo transfer, whereas controls were naturally conceived. Anthropometric measurements, bone age, dual-energy x-ray absorptiometry, fasting serum glucose, insulin, lipid profile, IGF-I and -II, and IGF-binding proteins 1, 2, and 3 were performed. RESULTS: There were 69 IVF children aged 5.9 +/- 0.2 yr and 71 control children aged 6.9 yr. IVF children were taller than controls when corrected for parents' heights (height sd score of 1.05 +/- 0.1 vs. 0.51 +/- 0.11, P = 0.001) with higher levels of serum IGF-II (850 +/- 24 vs. 773 +/- 24 microg/liter, P = 0.03), higher IGF-I to IGF-binding protein 3 ratio (P = 0.04), and a trend toward higher IGF-I (105 +/- 4 vs. 92 +/- 4 microg/liter, P = 0.06). IVF children had higher high-density lipoprotein (1.67 +/- 0.04 mmol/liter vs. 1.53 +/- 0.04 mmol/liter, P = 0.02), lower triglycerides (0.65 +/- 0.04 mmol/liter vs. 0.78 +/- 0.04 mmol/liter, P = 0.02), and a lower total to high-density lipoprotein cholesterol ratio (2.58 vs. 2.86, P = 0.01). There were no differences in body composition. CONCLUSIONS: IVF children are taller with higher IGF-I and IGF-II levels and have a slightly more favorable lipid profile. We speculate that IVF results in epigenetic change through altered methylation of genes involved in growth and metabolism. IVF programs should consider long-term longitudinal follow-up of IVF offspring
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