scholarly journals Accurate calibration and control of relative humidity close to 100% by X-raying a DOPC multilayer

2015 ◽  
Vol 17 (5) ◽  
pp. 3570-3576 ◽  
Author(s):  
Yicong Ma ◽  
Sajal K. Ghosh ◽  
Sambhunath Bera ◽  
Zhang Jiang ◽  
Stephanie Tristram-Nagle ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Calibration Curve ◽  
Humidity Chamber ◽  
And Control

A novel humidity chamber for accurate control of the relative humidity close to 100% using the shown calibration curve.

Continuous bubble humidification and control of relative humidity of H2 for a PEMFC system

2008 ◽  
Vol 33 (17) ◽  
pp. 4640-4648 ◽  
Author(s):  
G. Vasu ◽  
A.K. Tangirala ◽  
B. Viswanathan ◽  
K.S. Dhathathreyan
Keyword(s):  
Relative Humidity ◽  
And Control

Should black carbon concentration from aethalometer measurements onboard of UAVs be additionally corrected? - What is the impact of rapid relative humidity changes on our measurements?

2021 ◽  
Author(s):  
Grzegorz Florczyk ◽  
Krzysztof Markowicz
Keyword(s):  
Relative Humidity ◽  
Black Carbon ◽  
Mass Concentration ◽  
Strong Dependence ◽  
Correction Method ◽  
Atmospheric Measurements ◽  
Atmospheric Sciences ◽  
Humidity Chamber ◽  
Carbon Mass ◽  
The Impact

<p>Relative humidity and rates of its change are relevant parameters in atmospheric sciences. Observations of output data of AE-51 aethalometer operating in ACS1000 humidity chamber reveal strong dependence of attenuation on rapid relative humidity changes. Data collected in winter 2020/21 suggests a probability of similar effect occurring during UAV measurements as thermodynamic parameters could change fast during such runs. Two AE-51 devices were connected in the WET and DRY ACS1000 humidity chamber's channels. During periodic relative humidity oscillations, incident negative peaks of equivalent black carbon mass concentration coincide with high negative derivatives of relative humidity. In most extreme cases values of -1000 ng/m3 equivalent black carbon mass concentration were recorded in parallel with relative humidity derivative of -1.5 %/min. These correlations seem to play an important role in atmospheric measurements as vertical profiles of aerosol parameters such as attenuation are collected using UAV runs during which relative humidity varies significantly. Our goal is to propose a correction method to minimise these anomalies.</p>

scholarly journals Associations between Meteorological Factors and Visceral Leishmaniasis Outbreaks in Jiashi County, Xinjiang Uygur Autonomous Region, China, 2005–2015

2019 ◽  
Vol 16 (10) ◽  
pp. 1775 ◽  
Author(s):  
Yi Li ◽  
Canjun Zheng
Keyword(s):  
Relative Humidity ◽  
Visceral Leishmaniasis ◽  
Meteorological Factors ◽  
Public Health Problem ◽  
Monitoring And Control ◽  
Autonomous Region ◽  
Xinjiang Uygur Autonomous Region ◽  
Increasing Temperature ◽  
And Control ◽  
The Impact

Although visceral leishmaniasis disease is controlled overall in China, it remains a serious public health problem and remains fundamentally uncontrolled in Jiashi County, Xinjiang Uygur Autonomous Region. During 2005–2015, there were two outbreaks in Jiashi County. Assessing the influence of meteorological factors on visceral leishmaniasis incidence is essential for its monitoring and control. In this study, we applied generalized estimating equations to assess the impact of meteorological factors on visceral leishmaniasis risk from 2005 to 2015. We also compared meteorological factors among years with Kruskal–Wallis test to explore possible reasons behind the two outbreaks that occurred during our study period. We found that temperature and relative humidity had very significant associations with visceral leishmaniasis risk and there were interactions between these factors. Increasing temperature or decreasing relative humidity could increase the risk of visceral leishmaniasis events. The outbreaks investigated might have been related to low relative humidity and high temperatures. Our findings will support the rationale for visceral leishmaniasis control in China.

Bacterial Survival on Cornstarch-Containing Polyethylene Film Held Under Food Storage Conditions

1992 ◽  
Vol 55 (9) ◽  
pp. 681-686 ◽  
Author(s):  
A. A. STRANTZ ◽  
E. A. ZOTTOLA
Keyword(s):  
Relative Humidity ◽  
Pathogenic Bacteria ◽  
Polymer Network ◽  
Storage Conditions ◽  
Polyethylene Film ◽  
Food Storage ◽  
Bacterial Survival ◽  
Pseudomonas Fragi ◽  
General Survival ◽  
And Control

Plastics in which cornstarch is incorporated into the polymer network have been developed. The effect of cornstarch in plastic film on the survival of spoilage and pathogenic bacteria was evaluated. Cornstarch-containing polyethylene film (CSPE) and control polyethylene film (PE) were inoculated with Salmonella typhimurium, Aeromonas hydrophila, Bacillus cereus, and Pseudomonas fragi and held under various combinations of temperature and relative humidity to mimic food storage conditions. Bacterial recovery from film samples indicated that, in general, survival was not enhanced by the presence of cornstarch. Enhanced growth of S. typhimurium, A. hydrophila, and P. fragi was observed under saturated relative humidity at some storage temperatures when a CSPE-supplemented minimal salts medium was used as compared to PE-supplemented medium. Enhanced growth was not apparent when a nutritionally complex growth medium supplemented with CSPE or PE was used. These results indicated that, from a microbiological viewpoint, cornstarch-containing polyethylene film could be successfully used to package foods.

A CHAMBER FOR STUDYING THE EFFECT OF RELATIVE HUMIDITY AND SOIL MOISTURE ON INSECT EGGS

1968 ◽  
Vol 100 (4) ◽  
pp. 358-362 ◽  
Author(s):  
J. F. Doane ◽  
R. K. Allan
Keyword(s):  
Soil Moisture ◽  
Relative Humidity ◽  
Surface Area ◽  
Insect Eggs ◽  
Humidity Chamber ◽  
Solution Surface ◽  
And Performance ◽  
Optimum Relationship

AbstractConstruction and performance of a humidity chamber, designed to provide an optimum relationship between volume and conditioning-solution surface area, are described.

scholarly journals Design y development of a graphical user interface in LabVIEW for acquisition and visualization of climatological data (temperature and relative humidity)

2020 ◽  
pp. 18-29
Author(s):  
Víctor PEREZ-GARCIA ◽  
Joel QUINTANILLA-DOMINGUEZ ◽  
Israel YAÑEZ-VARGAS ◽  
José AGUILERA-GONZALEZ
Keyword(s):  
User Interface ◽  
Relative Humidity ◽  
Graphical User Interface ◽  
Graphical Interface ◽  
Monitoring And Control ◽  
Virtual Instrumentation ◽  
Text Documents ◽  
Wireless Monitoring ◽  
And Control ◽  
Future Work

This paper describes the design and development of a Graphical User Interface through the virtual instrumentation software NI LabVIEW using the VISA function, to graphically visualize and storage the data of the climatological variables of temperature and relative humidity. The graphical interface offers the option to export the date, time and data of the two variables to text documents with extension “.txt”, which acquires the information of the electronic board wireless monitoring and control, which uses a main device PIC16F877A microcontroller. AMT1001 Precision Analog Sensor was used to sense temperature and relative humidity. The PIC16F877A was programmed using a C programming language in the CCS Compiler compiler, to the data acquisition, and send it via RS232 communication to the computer, using the PL2303 module USB to TTL converter. To check the GUI operation, the electronic wireless monitoring and control card was connected to the computer equipment by wire, however, the monitoring of the climate variables can be done wirelessly by XBEE technology. Future work aims to monitor the climate of a horticultural greenhouse with XBBE technology, so that the data is sent wirelessly to a computer that has the GUI, and is also connected to Ethernet or WIFI, which will have the LabVIEW graphical interface explained in this article, and the data will be displayed / analyzed through the internet.

scholarly journals 808 PB 144 EFFECTIVNESS OF AEROSOL SPRAYS FOR CONTROLLING ROT IN TABLE GRAPES

HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 549a-549
Author(s):  
M. Ahmed Ahmedullah
Keyword(s):  
Sulfur Dioxide ◽  
Relative Humidity ◽  
Vitis Vinifera ◽  
Aerosol Particles ◽  
High Relative Humidity ◽  
Viable Alternative ◽  
Thompson Seedless ◽  
Storage Size ◽  
Table Grapes ◽  
And Control

Fruit of Vitis vinifera cvs. Flame Seedless, Thompson Seedless and Black Monukka were fumigated with 4, 6 and 8 Deccodione Smoke Tables (DST) for 30 minutes. Fruit was stored at 32 F and high relative humidity. Decay control index, freshness of stems and bleaching around the capstem were recorded at 4, 8, 12 and 16 weeks of storage. Size of the aerosol particles was determined using an electrical aerosol analyzer. Fruit was analysed for Deccodione residues. Lower rates of the fungicide gave unsatisfactory decay control. Eight DSTs successfully controlled decay upto a period of 14 weeks. There was no bleaching of pigments commonly associated with sulfur dioxide fumigation. Majority of the aerosol particles were between 0.18 and 0.32 micrometers. Deccodione residues on the fruit were within the acceptable limits established for Deccodione. There was no perceptible difference in taste between treated and control fruit. This method of decay control could provide a viable alternative to sulfur dioxide fumigation.

Sign in / Sign up

Export Citation Format

Share Document