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排序方式: 共有462条查询结果,搜索用时 31 毫秒
1.
Amicarelli Andrea Alessandrini Stefano Agate Giordano Ferrero Enrico Pirovano Guido Tinarelli Gianni Luigi Trini Castelli Silvia 《Environmental Fluid Mechanics》2021,21(2):433-463
Environmental Fluid Mechanics - A 3D dry deposition scheme for particulate matter (PM) is presented as a Free-Libre and Open-Source Software (FOSS) library, DePaSITIA (RSE SpA). This combines some... 相似文献
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Vanessa M. Barnabei MD PhD David A. Krantz James N. Macri John W. Larsen Jr 《黑龙江环境通报》1995,15(12):1131-1134
We have applied our multimarker approach of maternal serum alpha-fetoprotein (AFP) and free-beta human chorionic gonadotropin (hCG) for Down syndrome screening to multiple gestations to assess its efficacy for improved detection of twin and triplet pregnancies. This study matched 225 cases of twin pregnancy and 39 cases of triplet pregnancy each with ten singleton pregnancies based on gestational week, race, time to receive sample, time of year of sample, and geographical area. The ratios of the MOM for each group at the tenth, 50th, and 90th percentiles were compared by the Wilcoxon test. Risks for twins were calculated using Bayes' rule, the age-related incidence of twins, and the levels of AFP and free-beta hCG. The tenth, 50th, and 90th percentiles of free-beta hCG MOMs in twin and triplet cases were 0.85, 1.99, and 4.51, and 1.38, 2.78, and 4.07, respectively. For AFP, the MOMs at these percentiles were 1.26, 1.91, and 2.99, and 2.02, 2.68, and 5.30, respectively. The twin and triplet distributions for each marker were statistically significantly different from the singleton distributions (P<0.0001) and from each other (P=0.0012). At a twin risk cut-off of 1 in 50, 77.4 per cent of all twin gestations can be detected in a second-trimester AFP and free-beta hCG screening protocol with 5.1 per cent of singleton pregnancies falsely identified as at risk for twins. Our dual marker protocol for mid-trimester pregnancy screening combining AFP and free-beta hCG can identify over 77 per cent of twin pregnancies in women less than 35 years of age. This benefit may contribute to an improved outcome of pregnancy by early detection of multiple gestation. 相似文献
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Natural biodegradation can contain groundwaters impacted by creosote and pentachlorophenol. Using natural biodegradation for such sites is attractive because groundwater restoration is often impracticable, but the dissolved plumes are biodegradable and exert relatively low oxygen demands. Three case studies of its successful use are presented, with emphasis on the types of evidence needed, the rates and extents of removal, and the strategies for incorporating natural biodegradation into a remediation approach. Natural biodegradation was proven at all three sites, using a combination of field geochemical measurements, laboratory simulations, and computer modeling. Contaminant plumes at these three sites were contained within 100 to 700 feet downgradient of the apparent sources, although the rates of biodegradation varied widely. Natural biodegradation should be considered as part of an overall remedial strategy for most sites contaminated by creosote and/or pentachlorophenol. 相似文献
5.
Cicchella Domenico Hoogewerff Jurian Albanese Stefano Adamo Paola Lima Annamaria Taiani Manuela V. E. De Vivo Benedetto 《Environmental geochemistry and health》2016,38(2):619-637
Environmental Geochemistry and Health - The results of a large geochemical study on various environmental media (soil, stream sediment, groundwater, surface water, lettuce and human hair) of the... 相似文献
6.
Lando Gabriele Gomez-Laserna Olivia Proverbio Edoardo Khaskhoussi Amani Iannazzo Daniela Plutino Maria Rosaria De Stefano Concetta Bretti Clemente Cardiano Paola 《Environmental science and pollution research international》2021,28(37):51072-51087
Environmental Science and Pollution Research - This work is focused on the design and preparation of polymer inclusion membranes (PIMs) for potential applications for stannous cation sequestration... 相似文献
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Stefano Esposto 《Sustainability Science》2009,4(2):293-300
From the standpoint of international organisations, sustainability is an important aspect of assistance design and provision
in developing countries. The paper analyses how technical options or projects can be considered to address the needs of drinkable
water in Iraq, and why the sustainability of the project is a key factor in guaranteeing the durability and the efficacy in
time of the action. The design suggested in this paper can update current technology in Iraq in terms of water treatment process
for medium size plants, and help resolve the major problems faced today. 相似文献
9.
Sofia Bajocco Gianni Boris Pezzatti Stefano Mazzoleni Carlo Ricotta 《Environmental monitoring and assessment》2010,164(1-4):445-452
Because of the increasing anthropogenic fire activity, understanding the role of land-use in shaping wildfire regimes has become a major concern. In the last decade, an increasing number of studies have been carried out on the relationship between land-use and wildfire patterns, in order to identify land-use types where fire behaves selectively, showing a marked preference (or avoidance) in terms of fire incidence. By contrast, the temporal aspects of the relationship between landuse types and wildfire occurrence have received far less attention. The aim of this paper is, thus, to analyze the temporal patterns of fire occurrence in Sardinia (Italy) during the period 2000–2006 to identify land-use types where wildfires occur earlier or later than expected from a random null model. The study highlighted a close relationship between the timing of fire occurrence and land-cover that is primarily governed by two complementary processes: climatic factors that act indirectly on the timing of wildfires determining the spatial distribution of land-use types, and human population and human pressure that directly influence fire ignition. From a practical viewpoint, understanding the temporal trends of wildfires within the different land-use classes can be an effective decision-support tool for fire agencies in managing fire risk and for producing provisional models of fire behavior under changing climatic scenarios and evolving landscapes. 相似文献
10.
Stefano Goffredo Erik Caroselli Guido Mattioli Francesco Zaccanti 《Marine Biology》2010,157(12):2603-2612
In corals where complex life history processes decoupling age from size (e.g., fragmentation, fusion, partial colony mortality)
are rare or clearly detectable, individual age may be determined from size, and age-based growth and population dynamic models
may be applied. One example is the solitary Mediterranean coral Leptopsammia pruvoti Lacaze-Duthiers 1897, whose population size and structure, and growth rates were determined at Calafuria (43°28′N and 10°20′E),
Ligurian Sea, from December 2007 to June 2009. Growth rate decreased with increasing size. The growth curve derived from field
measurements confirmed the one obtained by growth band analysis. The frequency of individuals decreased exponentially with
age, indicating a steady state population. Turnover time was 2.3 years. Maximum life span was 13 years. Most reproductive
output was from intermediate age classes (6 years), while older individuals (>7 years), although having higher fecundity,
were rare and accounted for a minority of population reproductive output. In comparison with other solitary dendrophylliids,
L. pruvoti life strategy was characterized by a reproduction with r-strategy correlates (high fecundity, short embryo incubation, small planula size, fast achievement of sexual maturity), and
a rate of demographic renewal occurring halfway along the r–K continuum (intermediate turnover time and maximum longevity). 相似文献