Two-dimensional material-based functional aerogels for treating hazards in environment: Synthesis, functional tailoring, applications, and sustainability analysis

2022 ◽  
Author(s):  
Hao Kong ◽  
Yun Chen ◽  
Guozheng Yang ◽  
Bin Liu ◽  
Lei Guo ◽  
...  
Keyword(s):  
Environmental Pollution ◽  
Human Health ◽  
Two Dimensional ◽  
Ecological Balance ◽  
Global Problem ◽  
Sustainability Analysis ◽  
New Type

Environmental pollution is a global problem that endangers human health and ecological balance. As a new type of nanomaterial, two-dimensional material (2DM)-based aerogel is one of the most promising candidates...

Ferroelectric Liquid Crystal Light Valve Using SiO2 / A-Si:H Photodiode

1991 ◽  
Vol 219 ◽  
Author(s):  
T. Horikawa ◽  
S. Tahata ◽  
S. Kaho ◽  
T. Masumi ◽  
N. Mikami ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Dark Conductivity ◽  
Ferroelectric Liquid Crystal ◽  
Two Dimensional ◽  
Metal Insulator ◽  
Resolution Capability ◽  
New Type ◽  
Light Valve ◽  
Mis Diode ◽  
High Photosensitivity

ABSTRACTA new type of ferroelectric liquid crystal light valve (FLCLV) is presented. The design of the FLCLV is based upon the linear equivalent circuit analyses. A photosensor in the FLCLV consists of a metal-insulator-semiconductor (MIS) photodiode. A-Si:H doped with boron and nitrogen [a-Si:(:N:B)] is used in the MIS diode. The a-Si:H(:B:N) film has a dark-conductivity of less than 1×1012 S/cm and a high photosensitivity.Consequently, the writing characteristics of the FLCLV for a two dimensional (2D) image are evaluated. Using writing light of 630 nm and 1 mW/cm2, a high resolution capability of 120∼140 1p/mm is obtained.

Constructing cationic covalent organic frameworks by post-function for exceptional iodine capture via electrostatic interaction

2021 ◽  
Author(s):  
Lipeng Zhai ◽  
Shuzhuan Sun ◽  
Pengjing Chen ◽  
Yuwei Zhang ◽  
Qikun Sun ◽  
...  
Keyword(s):  
Environmental Pollution ◽  
Human Health ◽  
Nuclear Waste ◽  
Electrostatic Interaction ◽  
Nuclear Energy ◽  
Radioactive Iodine ◽  
Covalent Organic Frameworks ◽  
Continuous Development

With the continuous development of nuclear energy, the radioactive iodine in nuclear waste is becoming more and more harmful to environmental pollution and human health. Here, we synthesized two ionic...

scholarly journals IOT Based Smart Health Care

2018 ◽  
Vol 7 (2.7) ◽  
pp. 470 ◽  
Author(s):  
Yalamanchili Navya Teja ◽  
Lavu Vooha ◽  
Adusumilli Rohini Priya ◽  
N V.K.Ramesh
Keyword(s):  
Health Care ◽  
Environmental Pollution ◽  
Human Health ◽  
Health Problems ◽  
Mobile Data ◽  
Maximum Extent ◽  
Work Pressure ◽  
Smart Health

As these days there is a lot of effect because of environmental pollution and other factors like work pressure human health problems are increasing to a maximum extent. Technology takes a major role in monitoring the health of a individual. This helps to have a copy of recorded values and this helps in taking immediate steps to cure the condition or a precautions needed. As it important to monitor some parameters of the patient we use some sensors. The bluetooth module helps in collecting data from the sensors and sends it to the mobile through Bluetooth and this data can be uploaded to the cloud using Mobile data. This gives perfect data for the doctors to take a decision and give a suggestion to the patient.   

Three-dimensional disturbances to a mixing layer in the nonlinear critical-layer regime

1995 ◽  
Vol 291 ◽  
pp. 57-81 ◽  
Author(s):  
S. M. Churilov ◽  
I. G. Shukhman
Keyword(s):  
Travelling Waves ◽  
Mixing Layer ◽  
Three Dimensional ◽  
Critical Layer ◽  
Dimensional Case ◽  
Two Dimensional ◽  
Weakly Nonlinear ◽  
Weakly Nonlinear Theory ◽  
New Type ◽  
Two Stages

We consider the nonlinear spatial evolution in the streamwise direction of slightly three-dimensional disturbances in the form of oblique travelling waves (with spanwise wavenumber kz much less than the streamwise one kx) in a mixing layer vx = u(y) at large Reynolds numbers. A study is made of the transition (with the growth of amplitude) to the regime of a nonlinear critical layer (CL) from regimes of a viscous CL and an unsteady CL, which we have investigated earlier (Churilov & Shukhman 1994). We have found a new type of transition to the nonlinear CL regime that has no analogy in the two-dimensional case, namely the transition from a stage of ‘explosive’ development. A nonlinear evolution equation is obtained which describes the development of disturbances in a regime of a quasi-steady nonlinear CL. We show that unlike the two-dimensional case there are two stages of disturbance growth after transition. In the first stage (immediately after transition) the amplitude A increases as x. Later, at the second stage, the ‘classical’ law A ∼ x2/3 is reached, which is usual for two-dimensional disturbances. It is demonstrated that with the growth of kz the region of three-dimensional behaviour is expanded, in particular the amplitude threshold of transition to the nonlinear CL regime from a stage of ‘explosive’ development rises and therefore in the ‘strongly three-dimensional’ limit kz = O(kx) such a transition cannot be realized in the framework of weakly nonlinear theory.

scholarly journals PFAS Environmental Pollution and Antioxidant Responses: An Overview of the Impact on Human Field

2020 ◽  
Author(s):  
Marco Bonato ◽  
Francesca Corrà ◽  
Marta Bellio ◽  
Laura Guidolin ◽  
Laura Tallandini ◽  
...  
Keyword(s):  
Environmental Pollution ◽  
Human Health ◽  
Antioxidant Defense System ◽  
Epidemiological Studies ◽  
Negative Effects ◽  
Environmental Distribution ◽  
Commercial Applications ◽  
The Impact

Due to their unique properties, perfluorinated substances (PFAS) are widely used in multiple industrial and commercial applications, but they are toxic for animals, humans included. This review presents some available data on the PFAS environmental distribution in the world, and in particular in Europe and in Veneto region of Italy, where it has become a serious problem for human health. The consumption of contaminated food and drinking water is considered one of the major source of exposure for humans. Worldwide epidemiological studies report the negative effects that PFAS have on human health, due to environmental pollution, including infertility, steroid hormone perturbation, thyroid, liver and kidney disorders and metabolic disfunctions. In vitro and in vivo researches correlated PFAS exposure to oxidative stress effects (in mammals as well as in other vertebrates of human interest), produced by a PFAS-induced increase of reactive oxygen species formation. The cellular antioxidant defense system is activated by PFAS, but it is only partially able to avoid the oxidative damage to biomolecules.

scholarly journals Impact of common tobacco products on human health and environmental pollution in Bangladesh

2021 ◽  
Vol 31 (3) ◽  
pp. 130-143
Author(s):  
MA Mondol ◽  
AMM Hosain ◽  
S Sultana ◽  
S Marzia ◽  
MA Islam ◽  
...  
Keyword(s):  
Environmental Pollution ◽  
Human Health ◽  
Smokeless Tobacco ◽  
Tobacco Product ◽  
Tobacco Products ◽  
Face To Face ◽  
Adverse Health Effects ◽  
Survey Results ◽  
Young Smokers ◽  
Structured Questionnaire

Worldwide, tobacco is one of the leading causes of disability and death. Over a million of pounds of toxic chemicals are released by tobacco products. This study aims to explore the effects of tobacco toxicants on human health and environmental pollution. Four districts (Dhaka, Kushtia, Chattogram and Rangpur) were selected where most of the tobacco product grown. Total 468 respondents were interviewed face-to-face using structured questionnaire to assess the knowledge about toxicant content in tobacco and health and environmental hazards of tobacco use. Survey results revealed that about 44.4% respondents used smoking tobacco products and 38.5% used smokeless tobacco, while only 17.1% used both. About two third (74.3%) of smoking tobacco users started smoking when they were between 15 to 24 years old and majority (61.6%) of smokeless tobacco users started tobacco when they were between 30 to 35 years above. Tobacco product has large impacts on health of young smokers. Smokers are suffering from various acute and chronic diseases. Among the respondents, 38% indicated that they were suffering from hypertension. The second most affected disease was COPD/Asthma (31.6%), while cancer was the least suffering disease (0.4%). Majority of the respondents were not aware about the presence of toxicants (i.e. nicotine, tar and metals) in tobacco products. However, 85.1% tobacco users had an idea about environmental pollution. There is a lack of knowledge among the survey respondents about toxicants in tobacco products that are linked to health hazards and environmental pollution. These results are important in strengthening existing policy considering adverse health effects of toxicants examined. Progressive Agriculture 31 (3): 130-143, 2020

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