Under low N conditions, plants allocate a larger proportion of assimilated N and carbon (C) to the roots. Transport of C from shoot to the root via the phloem is enhanced (Gao et al. 2015; Wang and Ruan 2016).Rufty et al. showed that, in N-deficient leaves, 52% of the assimilates are used for root respiration, thereby promoting root …
During a design basis accident in a pressurized water reactor (PWR), the released hydrogen through reactor breaks would induce the hydrogen detonation. The hydrogen passive autocatalytic recombiner (PAR) is widely used as a hydrogen elimination measure in nuclear power plants due to its passive capability, low starting threshold and easy installation. …
Study of Gracia-Gomez et al. clearly revealed that the effect of ZnO-NPs (< 100 nm) depends on plant species, soil PH and exposure time.They observed that with decrease in soil pH the potentially available Zn fraction was prominently higher than in calcareous soil with higher pH value vis-a-vis the effects of ZnO-NPs were higher in soil …
The critical level of Zn was 0.69 mg/kg DTPA-Zn for peas grown in Indian paddy soils (Indira Sarangthem et al. 2018), and is generally between 0.6 and 1.0 mg/kg in Indian soils depending on the ...
Supply of Uranium. (Updated August 2023) Uranium is a relatively common metal, found in rocks and seawater. Economic concentrations of it are not uncommon. Quantities of mineral resources are greater than commonly perceived, and are relative to both market prices and cost of extraction. The world's known uranium resources increased by at least ...
Low-concentration sources, such as power generation, cement, and petrochemical production, with CO 2 concentrations in emissions streams of between 5 and 15 percent, represent the greatest …
This approach has not only resulted in the reduction of chrome losses (<12% Cr 2 O 3) but also the concentrator achieved a stringent target SiO 2 grade of 3.27% in the concentrate. The approach adopted and practical problems encountered during the study are reported in this paper. Keywords: chromite ore, characterization, QEMSCAN, gravity ...
It is the mixture of both the extracted drug material and the solvent of extraction.[2,3] Primary plant constituents. These are mainly nutritional components of plants such as common sugars, amino acid, proteins, and chlorophyll. These have little or no medicinal properties.[6,7] Secondary plant constituents. These are also known as …
Twenty-two (22) plant species were subjected to plant metal concentrations analyses for metals like Arsenic, Cadmium, Copper, Lead, and Mercury. Plesioneuron savaiense and Bats Wing Fern ...
This investigation will take advantage of the unique environment aboard the space station to study an intriguing phenomenon. When exposed to environmental stress, such as spaceflight, plants undergo surprising epigenetic changes. Meaning, instead of changing existing information in the DNA, extra information is added which affects gene …
edible plant parts like roots, herb, flowers and leaves were analyzed for 137Cs and 134Cs contents and activity concentrations were found in the range (0.40 to 3.20) Bq kg-1. Analysis confirmed the radioactivity contents in medicinal plants verily count on radiation exposure at explicit place. In 2007, Narayana et al. [36] investigated ayurvedic
To adapt to high salt concentrations, plants use following strategies; (a) activation of Na + efflux, (b) prevention of Na + influx, and (c) Na + compartmentalization in vacuoles (Rajendran et al., 2009). The Na + /H + antiporters (SOS1 and NHX1) maintain the optimum ionic concentrations in the cytoplasm to avoid toxicity due to Na +.
Open access. Published: 22 October 2013. Natural gold particles in Eucalyptus leaves and their relevance to exploration for buried gold deposits. Melvyn …
The plants found in the hydrocarbon exploration sites needs to be identified and the concentration of different minerals need to be determined. ... ( P < 0.0001) with increasing P concentrations ...
During the ten years that plant explorer Ernest Henry Wilson spent exploring eastern Asia, he collected more than 1,000 unique accessions for the Arnold Arboretum. He sent back around 16,000 herbarium …
Since 1991, the North America–China Plant Exploration Consortium (NACPEC) has brought together plant collectors from Chinese and American botanical institutions for 17 …
1. Introduction. Zinc (Zn) plays a substantial role in many biological processes and is an essential trace element for proper growth and reproduction of plants, and health of animals and humans; it has also been reported to cause contamination of soil, water, and food chains [[1], [2], [3]].In human beings Zn deficiency is associated to diet quality, …
Initially the term hyperaccumulator referred to plants able to accumulate more than 1 mg g −1 Ni (dry weight) in the shoot, an exceptionally high heavy metal concentration considering that in vegetative organs of most plants Ni toxicity starts from 10 to 15 μg g −1. Threshold values were successively provided to define the ...
The construction of the mineral concentration plant, which uses the flotation method, began in 2005. The plant started operating mid-2007. ... Future efforts will focus on the installation and evaluation of its effectiveness in other operations, along with an exploration of possible synergies with other existing technologies for eduction in ...
It is noteworthy that most of the reported lithium concentrations are way above the typical concentration of river waters (10 –4 –0.1 mg l −1) 31 and seawater (0.17 mg l −1) 32, which are ...
Cadmium (Cd) is an unessential trace element in plants that is ubiquitous in the environment. Anthropogenic activities such as disposal of urban refuse, smelting, …
Chowdhury, M. et al. Effects of temperature, relative humidity, and carbon dioxide concentration on growth and glucosinolate content of kale grown in a plant factory. Foods 10 (7), 1524 (2021).
Boucerosia diffusa Wight. is an important endangered medicinal plant belonging to the family Asclepiadaceae. In this study, an efficient protocol has been developed for B. diffusa using nodal explants for callus induction and direct organogenesis. The optimal callus induction (83.7%) was observed on 0.6 mg/L 2,4 …
Phytoremediation is a plant-based approach, which involves the use of plants to extract and remove elemental pollutants or lower their bioavailability in soil ( Berti and Cunningham, 2000 ). Plants have the abilities to absorb ionic compounds in the soil even at low concentrations through their root system.
Brine (concentrate) from desalination plants contains large quantities of minerals, enriched in concentration compared to sea water—thus the figures appearing …
The extensibility of synthetic polymers is routinely modulated by the addition of lower molecular weight spacing molecules known as plasticizers, and there is some evidence that water may have similar effects on plant cell walls. Furthermore, it appears that changes in wall hydration could affect wa …
There is an inverse relationship of Cd uptake and soil pH. Reduction in soil pH causes increase in Cd concentration in plants (Sarwar et al., 2010). Soil pH influences Cd availability in the soil solution but increasing soil pH does not always limit plant uptake of Cd (Kirkham, 2006). Soil pH is one of the significant factors that regulate the ...
The total phosphorus (TP) concentration is a key water quality parameter for water monitoring and a major indicator of the state of eutrophication in inland lakes. Using remote-sensing to estimate TP concentration is useful, as it provides a synoptic view of the entire water region; however, the weak optical characteristics of TP lead to …
NASA announces the award of 7 grants or cooperative agreements for exciting new space biology research that will advance NASA's understanding of how plants respond, acclimate and adapt to the space environment in support of human space exploration. Proposals for these projects were submitted in response to ROSES-2021 …
