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Selected AbstractsSeasonal and geographical toxicity of Indoxacarb against Helicoverpa armigera and influence of different host plants against Indoxacarb in India, 2005,2007ENTOMOLOGICAL RESEARCH, Issue 1 2009Basweshwar S. GHODKI Abstract Indoxacarb, an oxadiazine insecticide, was evaluated for its effectiveness against Helicoverpa armigera collected from selected locations in India. Determination of Indoxacarb efficacy was done using a log-dose probit (LDP) bioassay against third instars collected from cotton (Gossypium arborium) fields near Akola, India. Monthly levels of toxicity of Indoxacarb were determined from July 2005 to March 2007. The maximum tolerance level of Indoxacarb was reported for the Amaravati strain (5.09 p.p.m.) and the minimum tolerance level for the Fatehbad strain (0.22 p.p.m.). Seasonal monitoring of Indoxacarb toxicity revealed an increased trend in tolerance from July 2005 to February 2006, which decreased from March 2006. The LC50 of Indoxacarb was 2.71 p.p.m. in July 2005 and 17.14 p.p.m. in February 2006. During 2006,2007, the LC50 was 3.84 p.p.m. at the start of the season and in March 2007 it was 13.51 p.p.m. The minimum LC50 of Indoxacarb was reported for H. armigera larvae fed on Legasca spp. (1.62 p.p.m.) and the maximum LC50 was reported for H. armigera reared on chickpea (Cicer arietium) (8.45 p.p.m.). LC50 of 2.73 and 4.56 p.p.m. were reported for H. armigera fed on cotton (Gossypium arborium) and pigeonpea (Cajanus cajan), respectively. [source] Analysis of suspended sediment yields after low impact forest harvestingHYDROLOGICAL PROCESSES, Issue 26 2007Norifumi Hotta Abstract Disturbances to forest catchments have profound effects on the environment of headwater streams and have an impact on suspended sediment (SS) management. Forest harvesting is a dominant factor in increasing SS yields. Road construction, skidder activity and ploughing associated with harvesting cause serious soil disturbance that results in SS increases. However, few studies have shown whether harvesting itself increases SS yields. This study examined how harvesting influenced SS yields in a steep forested area. During harvesting, soil surface disturbance was prevented as much as possible by using skyline logging treatments and piling branches and leaves at selected locations in the watershed. Using these methods, the representative SS rating curve did not change significantly after harvesting. The results also show that the characteristics of SS transport were related to the SS source area, and reveal that the riparian zone/stream bank was a dominant SS source area at the study site. Annual SS yields did not increase despite increasing annual water yields after harvesting. The limited water capacity of the soil at the study site likely led to only slight differences in pre- and post-harvest water discharge from heavy rainfall events. Most SS was transported during heavy rainfall events, and increases in SS yields were not detected after harvesting. We concluded that it is possible to prevent post-harvest SS increases by performing careful, low-impact harvesting procedures. Copyright © 2007 John Wiley & Sons, Ltd. [source] Modeling of a geothermal standing column wellINTERNATIONAL JOURNAL OF ENERGY RESEARCH, Issue 4 2008E. Abu-Nada Abstract This paper presents a three-dimensional numerical investigation of a geothermal standing column well (SCW) to carry out heating simulations during January in four selected locations in Jordan. It is shown that the outlet temperature of SCW increases with the depth of the borehole. However, the successful choice of the location is of extreme importance as there is a limit on the outlet temperature that can be achieved at a given location. It is demonstrated that bleeding is generally effective in increasing the outlet temperature. An optimum range of bleed rate exists around 12,13%. Also, bleeding is more effective in achieving higher outlet temperatures when used in locations with higher soil porosity. Copyright © 2007 John Wiley & Sons, Ltd. [source] Review article: Early detection of chronic kidney disease in Australia: Which way to go?NEPHROLOGY, Issue 4 2009TIMOTHY MATHEW SUMMARY Early detection of chronic kidney disease (CKD) followed by appropriate clinical management appears the only means by which the increasing burden on the health-care system and affected individuals will be reduced. The asymptomatic nature of CKD means that early detection can only occur through testing of individuals. The World Health Organization principles of screening for chronic disease can now be largely fulfilled for CKD. The risk groups to be targeted, the expected yield and the tests to be performed are reviewed. For a screening programme to be sustainable it must carry a greater benefit than risk of harm for the participant and be shown to be cost-effective from the community point of view. Whole population screening for CKD is impractical and is not cost-effective. Screening of those at increased risk of CKD could occur either through special events run in the community, workplace or in selected locations such as pharmacies or through opportunistic screening of high-risk people in general practice. Community screening programmes targeted at known diabetics, hypertensives and those over 55 years have been described to detect 93% of all CKD in the community. The yield of CKD stages 3,5 from community screening has been found to vary from 10% to 20%. The limitations of screening programmes including the cost and recruitment bias are discussed. The most sustainable and likely the most cost-efficient model appears to be opportunistic general practice screening. The changing structure of general practice in Australia lends itself well to the requirements for early detection of CKD. [source] GPR survey to understand the stratigraphy of the Roman Ships archaeological site (Pisa, Italy)ARCHAEOLOGICAL PROSPECTION, Issue 1 2003M. T. Carrozzo Abstract Two surveys with ground-penetrating radar (GPR) were carried out in June and December 2000 at the Roman Ships archaeological site (Pisa, Italy). Both surveys were undertaken at selected locations, placed on the plan of excavation (,5 m from the ground surface), using a GSSI Sir System2 incorporating 35, 100, 200 and 500 MHz centre-frequency antennae. The main purpose of the two surveys was to test the value of radar in respect of penetration depth and, therefore, to reconstruct the geological stratigraphy, given the general not too favourable site conditions. The results showed that most of the GPR data acquired with the 35 MHz antenna were contaminated by strong reflections caused by above-ground objects near the survey lines. In fact, the archaeological area is protected on every side by iron barriers, around 6 m high, in order to guarantee the stability of the walls and to contain the present shallow groundwater. Therefore, it is very important to recognize the reflections through air (surface scattering) and not to confuse them with the reflections from underground geological features. For this purpose higher frequency antennae, less prone to surface scattering problems, although allowing shallower penetration depths, also have been used. Their higher resolution permitted the identification of some anomalies probably related to shallow stratigraphical boundaries, as well as other anomalies probably attributable to archaeological features. Moreover, the numerous measurements carried out in the second survey to estimate the velocity of propagation of the electromagnetic waves in the ground, contributed to a better interpretation of the geology of the site. Copyright © 2003 John Wiley & Sons, Ltd. [source] | ||||||||||