bluuebunny/crossref_metadata_2025_split huggingface dataset:
Factors affecting farmers' crop diversity decisions: An integrated approach
Authors: Cutforth Laurence B. , Francis Charles A. , Lynne Gary D. , Mortensen David A. , Eskridge Kent M. 
Published: October 2009

AbstractSustainable cropping systems use crop diversity as a foundation to reduce the environmental impacts of agrichemicals and risks of pest and disease outbreaks. Although greater diversity in the agricultural landscape is an important goal, the decisions of individual farmers determine the diversity of crops used in each farming system. Therefore, it is essential to gain an understanding of important factors in farmers' decisions as part of any proposed solution to low crop diversity. Our objective was to develop and test an integrated socioeconomic model of farmers' decisions on crop rotations as an indicator of overall crop diversity. The model incorporated measures of farmers' attitudes, net household income, control over decisions, social norms, and regional location to address the social, economic, and environmental factors of crop diversity. Mail survey responses from 197 farmers from a western Corn Belt county in 1998 supplied the data for the analysis. Location had the strongest influence on crop diversity in the model, on the basis of a standardized beta statistic of 0.46 in the ordinary least squares regression analysis. Farmers in the region with the highest degree of sloping land had significantly higher crop diversity than farmers in the most productive, relatively flat area. Lower household net income and positive attitudes toward crop rotations were also associated with higher crop diversity. We believe social norms and control would exert more influence in uncertain decisions. The results of this study suggest that, to maintain and possibly expand crop diversity in the future, targeting farmers in sloping landscapes with positive attitudes toward rotations would be the best approach to focus economic incentives for diverse crop rotations and technical support from Extension. In any effort to support crop diversity greater than a typical cornsoybean rotation, it is also critical to preserve integrated forage/crop/livestock systems. Further adaptation and application of our behavioral model in other settings would help to better evaluate, understand, and target the integrated decisions people make relative to crop diversity.
IPM adoption in northeastern U.S.: An examination of the IPM continuum
Authors: Hollingsworth Craig S. , Coli William M. 
Published: October 2009

AbstractSurvey data from sweet corn, strawberry, apple, and potato growers in nine northeastern U.S. states were used to assess relative levels of adoption of integrated pest management (IPM). Grower adoption of an IPM system was measured by assigning numerical values for completion of specific management practices, and summing the number of practice points. Practices included those for management of soil, nutrients, weeds, diseases and insects, and education. Numerical scores were used to describe IPM adoption as a continuum, with growers classified as low, moderate, or high adopters based on their completion of practices. The relative level of IPM adoption varied among crops and states. Forty-nine percent of sweet corn growers were found to be moderateto high-level IPM adopters, while 76% of strawberry growers, 90% of potato growers, and 69% of apple growers were moderate- to high-level adopters, respectively. Variation among states with respect to adoption of IPM is described and discussed.
Organic fruit production in Switzerland: Research and development to resolve cultural, management, and marketing problems
Authors: Weibel Franco P. 
Published: October 2009

AbstractThe area devoted to organic table fruit production in Switzerland remained virtually unchanged from the 1930s to the mid-1980s. However, during the last decade there has been a fivefold increase in the production area, approaching a total of 340 ha in 2000 (4.8% of the total area of table fruit production). Factors contributing to this dramatic increase include (1) new and effective non-chemical methods for pest and disease control, (2) improved management and production techniques from research and extension programs, (3) increased marketing of organic produce by supermarkets due to consumer demand, and (4) change in Swiss government policy that began to subsidize ecological performance rather than farm production. A 1994 poll of consumer demand indicated that 3 to 5% of the total apples marketed in Switzerland was organically grown, and projected a total market share of 10% in the near future. Despite this, conventional fruit growers are hesitant to convert to organic production methods because of certain risks involving (1) selection of varieties, (2) pest and disease control, (3) crop hectarage controls, (4) weed control, and (5) tree nutrition. Research and development programs are attempting to deal with these problems, to reduce the level of risk with organic production. Nevertheless, ecological considerations to optimize fruit production are strongly dictated by market conditions and consumer demand. Finally, the development of a stable organic fruit production sector will require that retailers and supermarkets make certain concessions for marketing organic fruit.
The concept of integrated systems in lower input/sustainable agriculture
Authors: Edwards Clive A. 
Published: October 2009

AbstractConventional agriculture has caused economic problems associated with overproduction of crops, increased costs of energy-based inputs and lessened farm incomes. It has also produced ecological problems such as poor ecological diversity, soil erosion, and soil and water pollution. The adoption of integrated systems of agricultural production involving lower inputs of fertilizer, pesticides and cultivations can alleviate these economic and ecological problems. Such systems are dependent upon a good understanding of the nature of interactions between the four main components of such systems, which are fertilizers, pesticides, cultivations and rotations and how these interactions influence crop yields and farm income. Alternatives to energy-based inputs include legume rotations, use of waste organic matter as well as that from animals and crops, integrated pest management, pest and disease forecasting, biological and cultural pest control, living mulches and mechanical weed control, conservation tillage methods, and specialized innovative cultural techniques, including intercropping, strip cropping, undersowing, trap crops, double-row cropping. Two commercial farms in Europe operated on integrated lower input systems have increased farm incomes by 5–20 percent. Further research on such techniques is needed, as well as computer-aided management systems, appropriate extension aids and farmer education.
Energy savings via FDI? Empirical evidence from developing countries
Authors: HÜBLER MICHAEL , KELLER ANDREAS 
Published: October 2009

ABSTRACTIn this paper we examine the influence of foreign direct investment (FDI) inflows on energy intensities of developing countries empirically. We first replicate a simple ordinary least squares (OLS) estimation, as it is found in the literature, that suggests energy-intensity reductions from FDI inflows. However, the OLS estimation turns out to be spurious and only a starting point for further research. In our regressions we use macro-level panel data on 60 developing countries for the period 1975–2004, including other potential determinants of energy intensities, and carry out robustness checks with more specific data. The results do not confirm the hypothesis that aggregate FDI inflows reduce energy intensity of developing countries. Rather, foreign development aid seems to be related to energy efficiency gains.
Electoral Rights beyond Territory and beyond Citizenship? The Case of South Korea
Authors: KALICKI KONRAD 
Published: October 2009

AbstractCurrent world migration is disrupting conceptual boundaries of national democratic polities. One area where the traditional sense of political community is being challenged concerns electoral rights fornon-resident citizensandnon-citizen residents. With the right to vote being an ultimate expression of political membership in a democratic nation-state, any debates about these two groups’ suffrage rights constitute a critical source of empirical insights into how democracies re-imagine themselves away from fixed identities under the pressure of globalization. In view of this, this paper examines the understudied case of South Korea, utilizing the most systematic theoretical framework currently available: one developed by Rainer Bauböck. It provides direct empirical evidence that undermines the conventional wisdom that Koreans define their polity purely on the basis of their ethnicity. Contrary to our expectations, a close scrutiny of the Korean debates in question reveals ample references to the civic ideals of political community. The line of reasoning that emphasizes duties towards the welfare of the polity has produced powerful justifications for denying political franchise to overseas compatriots, while granting limited electoral rights to qualified resident foreigners. A broader implication of this empirical finding is that it highlights a fundamental limitation of Bauböck's theoretical framework: it conceives political franchise only as an expression of people's rights in regard to law-making. The case of South Korea, thus, suggests that Bauböck's scheme should be modified to address both the rights-based logics and the somewhat obsolete duty-based logic of franchise extension.
The Pattern of Cooperation and Conflict between Korea and Japan: Theoretical Expectations and Empirical Realities
Authors: PARK CHEOL HEE 
Published: October 2009

AbstractOver the past few decades, cooperation between Korea and Japan has increased and deepened, but frictions continue to persist. Which direction is the relationship between Korea and Japan heading? This is the question that this article attempts to address.From an analytical standpoint, this article applies contemporary international relations theories – realism, liberalism, and constructivism – to the pattern of cooperation and conflict in Korea–Japan relations. After reviewing both optimistic and pessimistic positions drawn from diverse perspectives, the author makes a synthesis, where he suggests the case for cautious optimism.What we find in reality is long-term progress in an upward movement, interrupted by recurring frictions in the short term. Empirical evidence supports the case that Korea–Japan relations are making steady progress towards deeper, heightened, and multilayered cooperation. However, such issues as historical controversy and territorial disputes are the hurdles that both nations need to overcome. Whether Korea and Japan can maximize the effects of optimism, while they effectively minimize the impacts of pessimism will determine the nature of the ties between the two countries.Cooperation between the two countries is not necessarily guaranteed, but we find irreversible trends of improved cooperation over time. However, lingering suspicions, submerged nationalist sentiments, and sporadic surges of extremism remain. They should be carefully managed by the leaders of the two countries.
Medium selection in tissue culture of japonica rice cultivar Nipponbare and preparation of transgenic plants with an elicitor-coding gene from Magnaporthe grisea
Authors: Jian-Jun Mao , Xiu-Fen Yang , Hong-Mei Zeng , Jing-Jing Yuan , De-Wen Qiu 
Published: October 2009

AbstractN6 medium, Murashige and Skoog (MS) medium and BNBN medium were adopted in tissue cultures of Nipponbare (japonica) scutellum for performance comparison. Results indicated that, among the three kinds of culture media, the NB medium worked best in callus induction and gene transformation and was most suitable for tissue culture of Nipponbare scutellum. Based on this, the elicitor-encoding gene pemG1 from Magnaporthe grisea was introduced into the genome of Nipponbare via the Agrobacterium-mediated method. Transgenic rice plants were obtained. The integration, transcription and expression of pemG1 in rice were confirmed by polymerase chain reaction (PCR), Northern blot and Western blot, respectively. Genetic analysis showed that the transgenes were segregated normally in the progenies.
Effect of nanoparticles on the bacterial community of the cucumber phyllosphere
Authors: Li-Yan Chang , Qi Wang , Ru-Hong Mei 
Published: October 2009

AbstractWith the rapid development of nanotechnology, the security of nanomaterials has been an increasing cause for concern. In this study, the impact of titanium dioxide nanoparticles (nano-TiO2) on the phyllosphere bacterial community were analysed by both a culturable-dependent method and a polymerase chain reaction denaturing gradient gel electrophoresis (PCR-DGGE) method. The quantity of culturable phyllosphere bacteria was significantly reduced with an increased concentration of nano-TiO2. With increasing concentrations from 0.002 to 20 mg/ml of nano-TiO2, the quantity of culturable phyllosphere bacteria decreased from 1.8×106to 3.1×105cfu/g. The phyllosphere bacteria community was analysed by PCR-DGGE, and when the concentrations of nano-TiO2were higher than 0.02 mg/ml, the DGGE bands were significantly lower than in the control. Sequencing results of the bands from the DGGE gel showed that there were at least seven genera in the phyllosphere bacteria. Only one uncultured bacterium was unaffected by the concentration of nano-TiO2.
Cloning and eukaryotic expression of olfaction-related Gqα-protein gene in English grain aphid (Sitobion avenae)
Authors: Jia Fan , Ju-Lian Chen , Deng-Fa Cheng , Jing-Rui Sun 
Published: October 2009

AbstractBased on conserved homologous amino-acid sequences of the Gq protein α subunit in arthropods, a pair of degenerate primers were designed to amplify the gene from the English grain aphid (Sitobion avenae), using reverse transcriptase polymerase chain reaction (RT-PCR) and (3′/5′)-rapid amplification of cDNA ends (3′/5′ RACE) techniques. A Gqα protein was obtained from the alate adult aphids. The open reading-frame was 1062 bp, encoding 352 amino-acid residues with a calculated molecular weight of 40.8 kDa. The cDNA sequence was deposited in GenBank with accession no. EF638906. The deduced amino-acid sequence of Gqα shared a high identity (≥82.17%) with reported Gqα from other insects and even vertebrates, and had the typical characteristics of Gqα protein. In order to explore the function of the Gqα gene, a eukaryotic expressional system (baculovirus expression vector system, BEVS) was constructed by TOPO and Gateway techniques. After the recombinant reaction occurring between pUC-Gqα and the Gateway-adapted baculovirus DNA fromAutographa californica nuclear polyhedrosis virus(AcMNPV), the construct recombinant viruses containing V5-His6Gqα were transfected singly into the insect cell line of Tn-5B1-4. After collecting the infected cell, detection was conducted by sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE) and western blotting. The result showed that the system comprising recombinant baculovirus and Tn could express Gqα protein successfully.
Development of AFLP markers linked to stem nematode resistance gene in sweet potato (Ipomoea batatas (L.) Lam.)
Authors: Qin Jie , Hua Li , Hong Zhai , Yu-Ping Wang , Qiang Li , Dai-Fu Ma , Yi-Ping Xie , Qing-Chang Liu 
Published: October 2009

AbstractAmplified fragment length polymorphism (AFLP) markers linked to the stem nematode resistance gene were developed in sweet potato (Ipomoea batatas (L.) Lam.). Using bulked segregant analysis (BSA), 800 AFLP primer combinations were screened in the resistant and susceptible bulked DNA from the 186 progeny of an F1 single-cross population of Xu781 (resistant parent)×Xushu18 (susceptible parent), and 245 of these AFLP primers showed polymorphic bands between resistant and susceptible DNA. Primer combinations detecting polymorphism between the two bulks were used to screen the parents and eight individuals from each of the bulks. The results showed that E2M23 and E33M20 produced a specific band of about 500 bp and 200 bp in length, respectively, in the resistant plants but not in the susceptible plants, suggesting that the markers named E2M23500 and E33M20200 linked to a gene for stem nematode resistance. Amplified analysis of the 186 F1 individuals indicated that the genetic distance between these two markers and the stem nematode resistance gene was 6.9 cM and 11.1 cM, respectively, measured with Mapmaker 3.0. These two AFLP markers were used to identify ten sweet potato varieties planted widely in China and the results were consistent with those of conventional resistance identification, indicating that the two markers can be used in molecular marker-assisted breeding for stem nematode resistance in the sweet potato.
Population genetic diversity ofPhytophthora infestansfrom China as revealed by SSRs and RAPDs
Authors: Ben-Jin Li , Xin Lv , Qing-He Chen , Cheng-Zhong Lan , Jian Zhao , Rong-Zhou Qiu , Qi-Yong Weng 
Published: October 2009

AbstractSimple sequence repeats (SSR) and random amplification of polymorphic DNA (RAPD) molecular markers were used to assess the genetic diversity of 80 isolates ofPhytophthora infestansin potato (Solanum tuberosum) from Fujian, Heilongjiang, Hebei and Inner Mongolia Provinces in China. Polymorphism was identified by 13 SSR primers and 14 RAPD primers in the isolates ofP. infestansin potato. A total of 76 bands were amplified by SSRs, with the percentage of polymorphic bands (PPB) being 78.9% and the similarity coefficient ranging between 0.00 and 0.42. A total of 189 bands were amplified by RAPDs, with the percentage of polymorphic bands being 95.2% and the similarity coefficient ranging between 0.04 and 0.66. Analysis of genetic diversity showed that there exists higher genetic variation in the Fujian population in comparison to the populations of Heilongjiang, Hebei and Inner Mongolia. Nei's genetic identity analysis indicates that the genetic similarity between populations of Heilongjiang and Inner Mongolia is the highest and that between Fujian and Hebei is the lowest. A cluster analysis revealed that isolates from Fujian, in the south of China, are distantly related to those from Heilongjiang, Hebei and Inner Mongolia in the north, and the Fujian population is distributed among more groups than the other three, exhibiting a higher genetic diversity.
What factors influence seniors’ desire for choice among health insurance options? Survey results on the Medicare prescription drug benefit
Authors: Rice Thomas , Hanoch Yaniv , Cummings Janet 
Published: October 2009

AbstractQuestions about the design of the new US Medicare prescription drug benefit were raised even before its passage, where one of the most heated issues has been the number of plans offered to beneficiaries. Whether beneficiaries believe that there should be extensive or limited choice is still an open question. To study this issue, we analyzed data from the Kaiser Family Foundation/Harvard School of Public Health Survey, which included 718 individuals aged 65 years and above. The survey asked these older adults (i) whether they prefer having dozens of plans or for Medicare to offer a restricted number of plans and (ii) whether they think there are too many, too few or the right amount of plans. Our findings show that the majority of beneficiaries (69%) preferred that Medicare offer a limited number of options while only 29% wanted to see dozens of plans on the market. We also examine the effect of education level, income, political affiliation, race and health status on the desire for more or fewer plans. One surprising finding is that seniors with higher education appear to prefer fewer, not more, plan choices. Overall, our results question the merit of offering so many prescription drugs plan choices to Medicare beneficiaries.
Immunodeficiencies
Authors: Ballow M , Notarangelo L , Grimbacher B , Cunningham-Rundles C , Stein M , Helbert M , Gathmann B , Kindle G , Knight A K , Ochs H D , Sullivan K , Franco J L 
Published: October 2009

SummaryPrimary immunodeficiencies (PIDs) are uncommon, chronic and severe disorders of the immune system in which patients cannot mount a sufficiently protective immune response, leading to an increased susceptibility to infections. The treatment of choice for PID patients with predominant antibody deficiency is intravenous immunoglobulin (Ig) replacement therapy. Despite major advances over the last 20 years in the molecular characterization of PIDs, many patients remain undiagnosed or are diagnosed too late, with severe consequences. Various strategies to ensure timely diagnosis of PIDs are in place, and novel approaches are being developed. In recent years, several patient registries have been established. Such registries shed light on the pathology and natural history of these varied disorders. Analyses of the registry data may also reveal which patients are likely to respond well to higher Ig infusion rates and may help to determine the optimal dosing of Ig products. Faster infusion rates may lead to improved convenience for patients and thus increase patient compliance, and may reduce nursing time and the need for hospital resources. Data from two recent studies suggest that Gamunex® and Privigen® are well tolerated at high infusion rates. Nevertheless, careful selection of patients for high infusion rates, based on co-morbid conditions and tolerance of the current infusion rate, is advisable. Based on the available data, intravenous Ig offers broad protection against encapsulated organisms. As vaccine trends change, careful monitoring of specific antibody levels in the general population, such as those against pneumococcal and meningococcal bacteria, should be implemented.
Clinical applications of intravenous immunoglobulins (IVIg) – beyond immunodeficiencies and neurology
Authors: Hartung H-P , Mouthon L , Ahmed R , Jordan S , Laupland K B , Jolles S 
Published: October 2009

Summary
The clinical use of intravenous immunoglobulin (IVIg) has expanded beyond its traditional place in the treatment of patients with primary immunodeficiencies. Due to its multiple anti-inflammatory and immunomodulatory properties, IVIg is used successfully in a wide range of autoimmune and inflammatory conditions. Recognized autoimmune indications include idiopathic thrombocytopenic purpura (ITP), Kawasaki disease, Guillain–Barré syndrome and other autoimmune neuropathies, myasthenia gravis, dermatomyositis and several rare diseases. Several other indications are currently under investigation and require additional studies to establish firmly the benefit of IVIg treatment. Increasing attention is being turned to the use of IVIg in combination with other agents, such as immunosuppressive agents or monoclonal antibodies. For example, recent studies suggest that combination therapy with IVIg and rituximab (an anti-CD20 monoclonal antibody) may be effective for treatment of autoimmune mucocutaneous blistering diseases (AMBDs), with sustained clinical remission. The combination of IVIg and rituximab has also been used in the setting of organ transplantation. Firstly, IVIg ± rituximab has been administered to highly human leucocyte antigen (HLA)-sensitized patients to reduce anti-HLA antibody levels, thereby allowing transplantation in these patients. Secondly, IVIg in combination with rituximab is effective in the treatment of antibody-mediated rejection following transplantation. Treatment with polyclonal IVIg is a promising adjunctive therapy for severe sepsis and septic shock, but its use remains controversial and further study is needed before it can be recommended routinely. This review covers new developments in these fields and highlights the broad range of potential therapeutic areas in which IVIg may have a clinical impact.