- Water quality monitoring to support cumulative effects assessment and decision-making in the Mackenzie Valley, Northwest Territories, Canada. [Journal Article]
- IEIntegr Environ Assess Manag 2019 Jun 24
- Project proponent- and government-led environmental monitoring are required to identify, understand, and manage cumulative effects (CE); yet, such monitoring initiatives are rarely mutually supportiv…
Project proponent- and government-led environmental monitoring are required to identify, understand, and manage cumulative effects (CE); yet, such monitoring initiatives are rarely mutually supportive. Notwithstanding the need for a more integrated and complementary approach to monitoring, monitoring efforts are often less effective than intended for addressing cumulative effects. This paper examines current monitoring programs in the Mackenzie Valley, Northwest Territories, Canada, based on seven attributes: consistency, compatibility, observability, detectability, adaptability, accessibility, and usability. Results indicate a tenuous link between and across proponent-led monitoring requirements under project-specific water licenses, and government-led monitoring of regional baseline conditions. There is some consistency in what is monitored, but data are often incompatible, insufficient to understand baseline change, not transferable across projects or scales, inaccessible to end users, and ultimately unsuitable to understanding cumulative effects. Lessons from the Mackenzie Valley highlight the need for improved alignment of monitoring efforts across programs and scales, characterized by a set of common parameters that are most useful for early detection of cumulative change and supporting regulatory decisions at the project scale. This must be accompanied by more open and accessible data for both proponents and regulators, while protecting the sensitivity of proprietary information. Importantly, there must be conceptual guidance for CE, such that the role of monitoring is clear, providing the types of CE questions to be asked, identifying the hypotheses to be tested, and ensuring timely and meaningful results to support regulatory decisions. This article is protected by copyright. All rights reserved.
- Characterization of scale deposition in oil pipelines through X-Ray Microfluorescence and X-Ray microtomography. [Journal Article]
- ARAppl Radiat Isot 2019 Jun 14; 151:247-255
- The formation of scales consists in one of the most relevant problems in the oil prospecting field and occurs when incompatible types of water (injected sea water and formation water) are mixed in th…
The formation of scales consists in one of the most relevant problems in the oil prospecting field and occurs when incompatible types of water (injected sea water and formation water) are mixed in the reservoir, unavoidably undergoing chemical interaction followed by mineral precipitation. In this work, scale samples extracted from obstructed oil pipes were characterized through X-Ray Microfluorescence and X-Ray microtomography by analyzing their elemental and structural composition. Different types of scale were found according to their elemental distribution (mainly BaSO4 and CaCO3) and to the way that they were deposited inside the pipes. The results of both techniques provided data that can be used to optimize the prevention and removal methods of such materials from pipes and equipments used in oil facilities.
- Classification and influencing factors analysis of facial skin color in Chinese population. [Journal Article]
- SRSkin Res Technol 2019 Jun 22
- CONCLUSIONS: This study indicated the different influence of skin color components on perceived brightness between Caucasian and Chinese. And skin color was significantly affected by related variables such as gender, age, working environment, and lifestyles. Therefore, this study suggests how to brighten skin color in daily life.
- Microneedle-assisted microfluidic flow focusing for versatile and high throughput water-in-water droplet generation. [Journal Article]
- JCJ Colloid Interface Sci 2019 May 30; 553:382-389
- Microdroplets have been utilized for a wide range of applications in biomedicine and biological studies. Despite the importance of such droplets, their fabrication is associated with difficulties in …
Microdroplets have been utilized for a wide range of applications in biomedicine and biological studies. Despite the importance of such droplets, their fabrication is associated with difficulties in practice that emerge from the incompatible nature of chemicals, such as surfactants and organic solvents, with biological environments. Therefore, microfluidic methods have recently emerged that create biocompatible water-in-water droplets based on aqueous two-phase systems (ATPS), most commonly composed of water and incompatible polymers, dextran (DEX) and polyethylene glycol (PEG). However, so far, DEX- and PEG-based water-in-water droplet generation schemes have been plagued with low throughput, and most systems can only generate DEX-in-PEG droplets; PEG-in-DEX droplets have been elusive due to chemical interactions between the polymers and channel walls. Here, we describe a simple approach to generate water-in-water microdroplets passively at a high throughput of up to 850 Hz, and obtain both DEX-in-PEG and PEG-in-DEX droplets. Specifically, our method involves a simple modification to the conventional microfluidic flow focusing geometry, by the insertion of a microneedle to the flow focusing junction, which causes three-dimensional (3D) flow focusing of the dispersed phase fluid. We observe that the 3D flow focusing of the dispersed phase enables excellent control of droplet diameters, ranging from 5 to 65 µm, and achieves a high throughput. Moreover, we report the passive microfluidic generation of PEG-in-DEX droplets for the first time, because in our system the 3D flow focusing of the disperse phase separates the disperse PEG phase from the channel walls, negating the commonly observed wall wetting issues of the PEG phase. We expect this microfluidic approach to be useful in increasing the versatility and throughput of water-in-water droplet microfluidics, and help enable future biotechnological applications, such as microparticle-based drug delivery, cell encapsulation for single cell analysis, and immunoisolation for cell transplantation.
- Thiamin Determination in Food: A Chromatographic Challenge (P13-038-19). [Journal Article]
- CDCurr Dev Nutr 2019; 3(Suppl 1)
- CONCLUSIONS: An LC-MS/MS method was successfully developed for the combined determination of all thiamin vitamers and precursors. Application of this method will allow to guide the effectiveness of biofortification strategies in order to fight thiamine deficiency in developing countries.
- Assessment on interactive prospectives of nanoplastics with plasma proteins and the toxicological impacts of virgin, coronated and environmentally released-nanoplastics. [Journal Article]
- SRSci Rep 2019 Jun 20; 9(1):8860
- Recently, the concerns about micro- and nano-plastics (NPs) toxicity have been increasing constantly, however the investigations are quiet meager. The present study provides evidences on the toxicolo…
Recently, the concerns about micro- and nano-plastics (NPs) toxicity have been increasing constantly, however the investigations are quiet meager. The present study provides evidences on the toxicological prospectives of virgin-, coronated- and isolated-NPs on human blood cells and Allium cepa root tip, respectively. Several plasma proteins displayed strong affinity towards NPs and produced multi-layered corona of 13 nm to 600 nm size. The coronated-NPs often attracted each other via non-specific protein-protein attraction which subsequently induced protein-induced coalescence in NPs. In the protein point of view, the interaction caused conformational changes and denaturation of protein thereby turned it as bio-incompatible. The coronated-NPs with increased protein confirmation changes caused higher genotoxic and cytotoxic effect in human blood cells than the virgin-NPs. On the other hand, virgin-NPs and the NPs isolated from facial scrubs hindered the root growth and caused chromosome aberration (ring formation, C-mitotic and chromosomal breaks, etc.) in root of Allium cepa. At the outset, the present study highlights the urgent need of scrutinization and regulation of NPs use in medical applications and pre-requisition of additional studies for assessing the bio-accumulation and bio-magnification of NPs.
- Motor modules account for active perception of force. [Journal Article]
- SRSci Rep 2019 Jun 20; 9(1):8983
- Despite longstanding evidence suggesting a relation between action and perception, the mechanisms underlying their integration are still unclear. It has been proposed that to simplify the sensorimoto…
Despite longstanding evidence suggesting a relation between action and perception, the mechanisms underlying their integration are still unclear. It has been proposed that to simplify the sensorimotor integration processes underlying active perception, the central nervous system (CNS) selects patterns of movements aimed at maximizing sampling of task-related sensory input. While previous studies investigated the action-perception loop focusing on the role of higher-level features of motor behavior (e.g., kinematic invariants, effort), the present study explored and quantified the contribution of lower-level organization of motor control. We tested the hypothesis that the coordinated recruitment of group of muscles (i.e., motor modules) engaged to counteract an external force contributes to participants' perception of the same force. We found that: 1) a model describing the modulation of a subset of motor modules involved in the motor task accounted for about 70% of participants' perceptual variance; 2) an alternative model, incompatible with the motor modules hypothesis, accounted for significantly lower variance of participants' detection performance. Our results provide empirical evidence of the potential role played by muscle activation patterns in active perception of force. They also suggest that a modular organization of motor control may mediate not only coordination of multiple muscles, but also perceptual inference.
- Two Tragedies Argument: Two Mistakes. [Journal Article]
- JMJ Med Ethics 2019 Jun 20
- Most opposition to abortion turns on the claim that human fetuses are full moral agents from conception (or soon afterwards). Critics argue that antiabortion theorists act hypocritically when they ne…
Most opposition to abortion turns on the claim that human fetuses are full moral agents from conception (or soon afterwards). Critics argue that antiabortion theorists act hypocritically when they neglect spontaneous abortions-valuing some fetal lives and not others. Many philosophers draw a distinction between killing and letting die, with the former being morally impermissible and latter acceptable. Henrick Friberg-Fernros appeals to this distinction with his Two Tragedies Argument, contending that antiabortion theorists are justified in prioritising preventing induced abortions over spontaneous ones, as the former involves two tragedies-a death and a killing. However, induced abortion can involve either killing or letting die, and thus this view is incompatible with the traditional antiabortion view. Furthermore, Friberg-Fernros appears to value preventing killing attempts more than preventing actual deaths.
- Decaying Organic Matter Does Not Remove Sublethal Effects of Imidacloprid on Mating in Spalangia endius (Hymenoptera: Pteromalidae), a Parasitoid of Filth Flies. [Journal Article]
- JEJ Econ Entomol 2019 Jun 20
- Both the parasitoid wasp Spalangia endius Walker and the insecticide imidacloprid are used to control house flies. A recent study found that negative sublethal effects of imidacloprid on killing flie…
Both the parasitoid wasp Spalangia endius Walker and the insecticide imidacloprid are used to control house flies. A recent study found that negative sublethal effects of imidacloprid on killing flies and on offspring production by this parasitoid wasp are eliminated when females have the opportunity to crawl through decaying matter. An enzyme-linked immunosorbent assay showed that the presence of decaying matter reduces the amount of pesticide on their bodies. This study examined whether this was also true for sublethal effects on mating. S. endius were exposed to a realistic concentration of imidacloprid that induces very low mortality. Then, individual parasitoids were allowed to burrow through decaying organic matter or not, followed by mating tests in the absence of decaying matter. Even after 24 h with the decaying matter, copulation for both males and females that had previously been exposed to imidacloprid was delayed compared with no-pesticide controls. Furthermore, for pesticide-exposed males, subsequently burrowing through media made copulation even more delayed than if they were not exposed to media. For pesticide-exposed females, subsequently burrowing through media neither increased or decreased the negative effect of the pesticide exposure. Together with other studies, these results reinforce that use of S. endius and use of imidacloprid are incompatible, even at much lower than recommended concentration, unless application is sufficiently separated in place and time.
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- Experimental test of fine-grained entropic uncertainty relation in the presence of quantum memory. [Journal Article]
- SRSci Rep 2019 Jun 19; 9(1):8748
- The uncertainty principle, which gives the constraints on obtaining precise outcomes for incompatible measurements, provides a new vision of the real world that we are not able to realize from the cl…
The uncertainty principle, which gives the constraints on obtaining precise outcomes for incompatible measurements, provides a new vision of the real world that we are not able to realize from the classical knowledge. In recent years, numerous theoretical and experimental developments about the new forms of the uncertainty principle have been achieved. Among these efforts, one attractive goal is to find tighter bounds of the uncertainty relation. Here, using an all optical setup, we experimentally investigate a most recently proposed form of uncertainty principle-the fine-grained uncertainty relation assisted by a quantum memory. The experimental results on the case of two-qubit state with maximally mixed marginal demonstrate that the fine-graining method can help to get a tighter bound of the uncertainty relation. Our results might contribute to further understanding and utilizing of the uncertainty principle.