Chemical characterization and sources identification of PM2.5 in a tropical urban city during non-hazy conditions

Urban Climate ◽  
2021 ◽  
Vol 39 ◽  
pp. 100953
Author(s):  
Hanashriah Hassan ◽  
Mohd Talib Latif ◽  
Liew Juneng ◽  
Norhaniza Amil ◽  
Md Firoz Khan ◽  
...  
Keyword(s):  
Chemical Characterization ◽  
Sources Identification ◽  
Urban City

Realtime chemical characterization of post monsoon organic aerosols in a polluted urban city: Sources, composition, and comparison with other seasons

2018 ◽  
Vol 232 ◽  
pp. 310-321 ◽  
Author(s):  
Abhishek Chakraborty ◽  
Anil Kumar Mandariya ◽  
Ruparati Chakraborti ◽  
Tarun Gupta ◽  
S.N. Tripathi
Keyword(s):  
Organic Aerosols ◽  
Chemical Characterization ◽  
Post Monsoon ◽  
Urban City

The Possibilities for Analytical Methods in Photoemission and Low-Energy Electron Microscopy

1990 ◽  
Vol 48 (1) ◽  
pp. 348-349
Author(s):  
Ernst Bauer
Keyword(s):  
Chemical Characterization ◽  
Emission Angle ◽  
Relative Energy ◽  
Objective Lens ◽  
Chemical Information ◽  
Magnetic Lens ◽  
Incident Intensity ◽  
X Ray ◽  
Leed Pattern ◽  
Image Position

One of the major shortcomings of conventional PEEM and of LEEM is the lack of chemical information about the surface. Although the imaging of the LEED pattern in the back focal plane of the objective lens of a LEEM instrument allows chemical characterization via the crystalline structure derived from the LEED pattern, this method fails in the absence of a characteristic LEED pattern. Direct information about the atomic composition of the surface is then needed which can be best obtained from inner shell electrons either directly by x-ray-induced photoemission (XPEEM) or by x-ray- or electron-induced Auger electron emission (AEEM). These modes of excitation and imaging can be combined with conventional PEEM and LEEM in one instrument which is presently being developed. Thus a complete structural and chemical characterization becomes possible in one instrument, with parallel detection and high resolution.In contrast to LEEM, in which up to more than 50% of the incident intensity is available for image formation, the intensity of the emitted electrons is much lower in XPEEM and AEEM and the signal is much lower than the background in AEEM. Therefore, intensity I and resolution d have to be optimized simultaneously which is best done by maximizing Q = I/d2 with respect to maximum emission angle α and relative energy distribution ε = ΔVo/V accepted by the instrument. For a well-designed magnetic lens section of the cathode lens its aberrations are determined by the accelerating field F in front of the specimen. For a homogeneous accelerating field F and a cosine emission distribution one obtains for the optimum α and ε values αo,εo a radius of the minimum disc of confusion of

Olfactory and Chemical Characterization of Indoor Air-Towards a Psychophysical Model for Air Quality

1981 ◽  
Author(s):  
Birgitta Berglund ◽  
Ulf Berglund ◽  
Thomas Lindvall ◽  
Helene Nicander-Bredberg
Keyword(s):  
Air Quality ◽  
Indoor Air ◽  
Chemical Characterization

Lifelog using Mobility Context Information in Urban City Area

2019 ◽  
Author(s):  
Yanlei Gu ◽  
Dailin Li ◽  
Yoshihiko Kamiya ◽  
Shunsuke Kamijo
Keyword(s):  
Context Information ◽  
City Area ◽  
Urban City

PURIFICATION AND PARTIAL CHEMICAL CHARACTERIZATION OF SHEEP NEUROPHYSIN

1973 ◽  
Vol 74 (2) ◽  
pp. 226-236 ◽  
Author(s):  
Michel Chrétien ◽  
Claude Gilardeau
Keyword(s):  
Amino Acid ◽  
Polyacrylamide Gel Electrophoresis ◽  
Chemical Characterization ◽  
Terminal Amino Acid ◽  
Amino Acid Determination ◽  
Pituitary Glands ◽  
Terminal Amino ◽  
Partial Chemical ◽  
Acid Determination

ABSTRACT A protein isolated from ovine pituitary glands has been purified, and its homogeneity assessed by NH2- and COOH-terminal amino acid determination, ultracentrifugation studies, and polyacrylamide gel electrophoresis after carboxymethylation. Its chemical and immunochemical properties are closely similar to those of beef and pork neurophysins, less similar to those of human neurophysins. It contains no tryptophan (like other neurophysins) or histidine (like all except bovine neurophysin-I and human neurophysins). It has alanine at the NH2-terminus and valine at the COOH-terminus. Its amino acid composition is similar to, but not identical with those of porcine and bovine neurophysins.

An Important Relationship between Tourism and Hospitality: A Questionnaire Based Survey on Local People, Kolkata, India

2018 ◽  
Vol 6 (9) ◽  
pp. 189
Author(s):  
Shriya Das Mahapatra ◽  
R. K. Patra
Keyword(s):  
Hospitality Management ◽  
Local People ◽  
Recent Past ◽  
Urban City ◽  
Important Relationship ◽  
Close Relationship ◽  
Employment Generation ◽  
Tourism And Hospitality Industry ◽  
Tourism And Hospitality ◽  
Industry Relationship

It has already been known that recent past tourism depends consistently on hospitality. The present study was aiming to identify the tourism and hospitality industry relationship on the basis of annual income, duration and stay types, tenure of tour, an analysis based survey among local people of Kolkata, India. The survey was done through a questionnaire, which was assessed through random sampling of 200 residents of urban city. The results indicated that lower the income groups but highest duration of stay but tenure of tour may be more than twice per year. In conclusion, people of Kolkata fond of tour because of suitable hospitality management in the tourist spots. Therefore, tourism and hospitality has a close relationship to enhance growth for revenue generation, employment generation, etc.

Sign in / Sign up

Export Citation Format

Share Document