A dynamical explanation for the high water abundance detected in Orion

1979 ◽  
Vol 229 ◽  
pp. 560 ◽  
Author(s):  
M. Elitzur
2018 ◽  
Vol 2 (08) ◽  
Author(s):  
Kayla Dean ◽  
Nripendra Bose ◽  
Saleigh Derico ◽  
Felicia Jefferson

There has been an increase of heavy metals in agricultural soil. The potentially harmful metals in the soil may come from the bedrock, waste deposits, agricultural inputs and urban emissions. Moreover, contaminated food is considered the main source by which humans are exposed to toxic elements. Fruits and vegetables are regarded as containing a low percentage of toxic compounds due to their high water abundance. However, dried fruits, which are often sold in areas where the abundance of fresh fruits and vegetables is low, may contain more toxic elements. Within considering all of the factors the trace metals induce on humans via the consumption of plants, one is able to analyze then disproportionate availability of toxin less foods in certain areas. Reasons that people do not consume fruits and vegetables that are not toxic are complex. This disproportionate representation is evident mainly in urban areas. Studies have shown that urban African Americans who shopped at their local neighborhood small- food stores consumed fewer fresh fruits and vegetables than their higher income peers who were able to shop in suburban supermarkets. Environmental barriers have been found the main cause for the limited availability of fresh fruits and vegetables. This research project will engage whether or not there is a disproportionate availability of toxin less foods in West End Atlanta community area by utilizing the Inductively Coupled Plasma Optic Emission Spectroscopy (ICP-OES), which will analyze the trace metal contents of arsenic, cadmium and lead in apples, bananas, and potatoes.


2018 ◽  
Vol 2 (10) ◽  
Author(s):  
Kayla Dean ◽  
Nripendra Bose ◽  
Saleigh Derico ◽  
Felicia Jefferson

There has been an increase of heavy metals in agricultural soil. The potentially harmful metals in the soil may come from the bedrock, waste deposits, agricultural inputs and urban emissions. Moreover, contaminated food is considered the main source by which humans are exposed to toxic elements. Fruits and vegetables are regarded as containing a low percentage of toxic compounds due to their high water abundance. However, dried fruits, which are often sold in areas where the abundance of fresh fruits and vegetables is low, may contain more toxic elements. Within considering all of the factors the trace metals induce on humans via the consumption of plants, one is able to analyze then disproportionate availability of toxin less foods in certain areas. Reasons that people do not consume fruits and vegetables that are not toxic are complex. This disproportionate representation is evident mainly in urban areas. Studies have shown that urban African Americans who shopped at their local neighborhood small- food stores consumed fewer fresh fruits and vegetables than their higher income peers who were able to shop in suburban supermarkets. Environmental barriers have been found the main cause for the limited availability of fresh fruits and vegetables. This research project will engage whether or not there is a disproportionate availability of toxin less foods in West End Atlanta community area by utilizing the Inductively Coupled Plasma Optic Emission Spectroscopy (ICP-OES), which will analyze the trace metal contents of arsenic, cadmium and lead in apples, bananas, and potatoes.


2021 ◽  
Vol 48 (10) ◽  
Author(s):  
Denis A. Belyaev ◽  
Anna A. Fedorova ◽  
Alexander Trokhimovskiy ◽  
Juan Alday ◽  
Franck Montmessin ◽  
...  
Keyword(s):  

2021 ◽  
Author(s):  
Denis A. Belyaev ◽  
Anna A. Fedorova ◽  
Alexander Trokhimovskiy ◽  
Juan Alday Parejo ◽  
Franck Montmessin ◽  
...  
Keyword(s):  

2021 ◽  
Author(s):  
Denis A. Belyaev ◽  
Anna A. Fedorova ◽  
Alexander Trokhimovskiy ◽  
Juan Alday Parejo ◽  
Franck Montmessin ◽  
...  
Keyword(s):  

The Holocene ◽  
2018 ◽  
Vol 28 (8) ◽  
pp. 1325-1333 ◽  
Author(s):  
Monica L Smith ◽  
Rabindra Kumar Mohanty

In discussions of human-environmental dynamics and climate change, treatments of water usually focus on the problem of drought. Monsoon environments constitute a different set of parameters for landscape interactions because of seasonal episodes of water abundance. In this paper, we evaluate the microscale management of routine and anticipated high-water events for the ancient Indian subcontinent, where people used the monsoon cycle to engage in rice farming that in turn supported the growth of cities. Rice production would have encompassed two fluctuating inputs: rural labor, which may have become scarce when villagers left farmlands to become city dwellers; and water, the quantity of which varies dramatically on both a seasonal basis because of the monsoon and on an occasional basis because of tropical cyclones. The abundance of water (even with its risks of overabundance) encompassed numerous logistical challenges but also permitted high productivity within short distances of urban centers. The case study of the ancient city of Sisupalgarh in eastern India illustrates that high levels of productivity per land area enabled city residents to engage in short-distance economies for food production, while maintaining regional contacts through durable-goods trade to mitigate occasional episodes of crop failure in times of major flooding.


Author(s):  
Martin A. Levin ◽  
Lisa L. Cale ◽  
Valerie Lynch-Holm

Orchestia is a genus of amphipod in the crustacean class Malacostraca. The order Amphipoda contains over 6000 species commonly called side swimmers, scuds and beach fleas(1). Most are marine bottom-dwellers utilizing their thoracic legs and posterior abdominal uropods for walking, crawling and swimming. However, some, like those in the genera Orchestia and Hyale are semiterrestrial. These amphipods, commonly referred to as “beach fleas,' “beach hoppers” or “sand fleas” can hop vigorously for great distances (up to 50 times their length) by extending their abdomens and telsons against the sand(2).In our study, the ultrastructure of the dorsal muscle cord of Orchestia grillus was examined. Vogel(3) described the abdominal muscles of Orchestia cavimana as consisting of two groups of muscles: a strong, complex, dorsal muscle cord used mainly for hopping and a group of weaker, ventral, longitudinal and oblique muscles.The specimens were collected in clumps of decaying seaweed and other detritus from the intertidal zone near the high water mark at Avery Point Beach, Connecticut.


2017 ◽  
Vol 19 (2) ◽  
pp. 157
Author(s):  
Nunung Puji Nugroho

<p class="JudulABSInd"><strong>ABSTRAK</strong></p><p class="abstrak">Informasi hasil air dari suatu ekosistem sangat penting dalam pengelolaan sumber daya air. Dalam perencanaan kegiatan konservasi sumber daya air, informasi sebaran spasial hasil air diperlukan untuk menentukan prioritas wilayah terkait dengan alokasi anggaran. Hasil air dari suatu ekosistem atau daerah aliran sungai (DAS) dapat diestimasi dengan menggunakan model hidrologi. Penelitian ini bertujuan untuk mendapatkan informasi tentang hasil air, baik besaran maupun sebaran spasialnya, dari daerah tangkapan air (DTA) Danau Rawa Pening. Hasil air dari lokasi penelitian dihitung dengan menggunakan model hasil air pada InVEST (<em>the Integrated Valuation of Ecosystem Services and Tradeoffs</em>), yang didasarkan pada pendekatan neraca air. Hasil perhitungan menunjukkan bahwa volume hasil air di DTA Danau Rawa Pening pada tahun 2015 adalah sekitar 337 juta m<sup>3</sup>. SubDAS Galeh, sebagai subDAS terluas, merupakan penghasil air terbesar (72,4 juta m<sup>3</sup>) diikuti oleh subDAS Sraten (66,8 juta m<sup>3</sup>) dan Parat (62,4 juta m<sup>3</sup>). Secara spasial, hasil air di lokasi kajian mempunyai nilai antara 0 hingga 29.634,19 m<sup>3</sup>/ha. Wilayah hulu dan tengah subDAS Sraten secara umum mempunyai hasil air yang lebih tinggi, sedangkan wilayah danau dan sekitarnya serta hulu subDAS Galeh mempunyai hasil air yang lebih rendah dibandingkan dengan wilayah lainnya. Wilayah dengan hasil air tinggi dapat diprioritaskan dalam kegiatan konservasi sumber daya air untuk mendukung pasokan air ke Danau Rawa Pening.</p><p><strong><em>Kata kunci</em></strong><em>: hasil air, daerah tangkapan air, model InVEST, Danau Rawa Pening</em><em></em></p><p class="judulABS"><strong>ABSTRACT</strong></p><p class="Abstrakeng">Accurate information on water yield from an ecosystem is very important in the management of water resources. In the planning of water resources conservation activities, the information on the spatial distribution of water yield is needed to determine regional priorities related to budget allocations. The water yield from an ecosystem or watershed can be estimated using a hydrological model. This study aimed to obtain information about the water yield, both the magnitude and their spatial distribution, from the catchment areas of Lake Rawa Pening. The water yield from the study area was calculated using the water yield model in InVEST (the Integrated Valuation of Ecosystem Services and Tradeoffs), which based on the water balance approach. The results indicated that the volume of water yield in Lake Rawa Pening for 2015 is approximately 337 million m<sup>3</sup>. Galeh subwatershed, as the largest subwatershed, is the largest water producer (72.4 million m<sup>3</sup>), followed by Sraten subwatershed (66.8 million m<sup>3</sup>) and Parat subwatershed (62.4 million m<sup>3</sup>). Spatially, the water yield at the study site has a value between 0 to 29,634.19 m<sup>3</sup>/ha. Upstream and middle areas of Sraten subwatershed generally have higher water yield, while the lake and its surrounding areas as well as the upstream of Galeh subwatershed have lower water yield compared to other regions. The regions with high water yield can be prioritized in water resource conservation activities to support the supply of water to Lake Rawa Pening.</p><p><strong><em>Keywords</em></strong><em>: water yield, catchment areas, InVEST model, Lake Rawa Pening</em><em></em></p>


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