HYGROSCOPIC GROWTH OF AEROSOL PARTICLES WITH COMPLEX CHEMICAL COMPOSITION

2001 ◽  
Vol 32 ◽  
pp. 293-294
Author(s):  
S. KAMM ◽  
R. NIESSNER ◽  
U. PÖSCHL
Keyword(s):  
Chemical Composition ◽  
Aerosol Particles ◽  
Hygroscopic Growth ◽  
Complex Chemical ◽  
Complex Chemical Composition

Behavior of Some Varieties in the Kernel Group to the Attack of the Main Pathogens

2018 ◽  
Vol 12 (2) ◽  
pp. 1-7
Author(s):  
Sînziana Venera Morărița
Keyword(s):  
Chemical Composition ◽  
Climatic Conditions ◽  
Complex Chemical ◽  
Complex Chemical Composition ◽  
Large Production ◽  
Special Quality

Abstract Although relatively recent, peach culture has grown great in our country due to the special quality of the fruit, its very complex chemical composition and the large production that can be obtained without much effort. Peach is a species slightly adapted to our climatic conditions, suffers from winter frost, but can provide productive and long productions of 10-15 years.

Beans (Phaseolus vulgaris L.): whole seeds with complex chemical composition

2018 ◽  
Vol 19 ◽  
pp. 63-71 ◽  
Author(s):  
Francine Gomes Basso Los ◽  
Acácio Antonio Ferreira Zielinski ◽  
José Pedro Wojeicchowski ◽  
Alessandro Nogueira ◽  
Ivo Mottin Demiate
Keyword(s):  
Chemical Composition ◽  
Phaseolus Vulgaris ◽  
Phaseolus Vulgaris L ◽  
Complex Chemical ◽  
Complex Chemical Composition

scholarly journals Experimental study of the stability and synthesis of the tourmaline supergroup minerals

2019 ◽  
Vol 64 (10) ◽  
pp. 1064-1078
Author(s):  
T. V. Setkova ◽  
V. S. Balitsky ◽  
Yu. B. Shapovalov
Keyword(s):  
Experimental Study ◽  
Growth Rate ◽  
Chemical Composition ◽  
Chemical Stability ◽  
Hydrothermal Solutions ◽  
High Chemical ◽  
Complex Chemical ◽  
Complex Chemical Composition ◽  
The Stability ◽  
High Chemical Stability

Tourmaline is one of the most widespread minerals in nature and one of the most popular gems and promising piezoelectric material. The growth of large crystals is today a topical task. With the growth of tourmaline single crystals appears problems associated with its complex chemical composition, high chemical stability in hydrothermal solutions and a low growth rate. The paper reviews of recent work on the tourmaline synthesis and the results obtained in IEM RAS.

Closure Between Chemical Composition and Hygroscopic Growth of Aerosol Particles During TORCH2

2007 ◽  
pp. 731-735 ◽  
Author(s):  
M. Gysel ◽  
Jonathan Crosier ◽  
D. O. Topping ◽  
J. D. Whitehead ◽  
K. N. Bower ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Aerosol Particles ◽  
Hygroscopic Growth

scholarly journals Investigation of electrooptical breakdown threshold in gas mixtures of complex chemical composition

2015 ◽  
Vol 652 ◽  
pp. 012043 ◽  
Author(s):  
E Y Loktionov ◽  
N A Pasechnikov ◽  
A V Pavlov ◽  
Y S Protasov ◽  
V D Telekh
Keyword(s):  
Chemical Composition ◽  
Gas Mixtures ◽  
Breakdown Threshold ◽  
Complex Chemical ◽  
Complex Chemical Composition

scholarly journals Closure study between chemical composition and hygroscopic growth of aerosol particles during TORCH2

2007 ◽  
Vol 7 (24) ◽  
pp. 6131-6144 ◽  
Author(s):  
M. Gysel ◽  
J. Crosier ◽  
D. O. Topping ◽  
J. D. Whitehead ◽  
K. N. Bower ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Aerosol Particles ◽  
Residence Times ◽  
Hygroscopic Growth ◽  
Data Set ◽  
Composition Data ◽  
The North ◽  
Aerosol Mass ◽  
Hygroscopic Properties ◽  
Evaporation Losses

Abstract. Measurements of aerosol properties were made in aged polluted and clean background air masses encountered at the North Norfolk (UK) coastline as part of the TORCH2 field campaign in May 2004. Hygroscopic growth factors (GF) at 90% relative humidity (RH) for D0=27–217 nm particles and size-resolved chemical composition were simultaneously measured using a Hygroscopicity Tandem Differential Mobility Analyser (HTDMA) and an Aerodyne aerosol mass spectrometer (Q-AMS), respectively. Both hygroscopic properties and chemical composition showed pronounced variability in time and with particles size. With this data set we could demonstrate that the Zdanovskii-Stokes-Robinson (ZSR) mixing rule combined with chemical composition data from the AMS makes accurate quantitative predictions of the mean GF of mixed atmospheric aerosol particles possible. In doing so it is crucial that chemical composition data are acquired with high resolution in both particle size and time, at least matching the actual variability of particle properties. The closure results indicate an ensemble GF of the organic fraction of ~1.20±0.10 at 90% water activity. Thus the organics contribute somewhat to hygroscopic growth, particularly at small sizes, however the inorganic salts still dominate. Furthermore it has been found that most likely substantial evaporation losses of NH4NO3 occurred within the HTDMA instrument, exacerbated by a long residence time of ~1 min. Such an artefact is in agreement with our laboratory experiments and literature data for pure NH4NO3, both showing similar evaporation losses within HTDMAs with residence times of ~1 min. Short residence times and low temperatures are hence recommended for HTDMAs in order to minimise such evaporation artefacts.

scholarly journals Levantamento dos estudos realizados com a própolis produzida no estado da Bahia

2013 ◽  
Vol 13 ◽  
Author(s):  
Aline Silva Costa ◽  
Bruna Aparecida Souza Machado ◽  
Marcelo Andres Umsza-Guez ◽  
Marina Gonçalves Cirqueira ◽  
Silmar Baptista Nunes ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Chemical Composition ◽  
The State ◽  
Complex Chemical ◽  
Scientific Papers ◽  
Complex Chemical Composition ◽  
Almost All

Propolis is a product of varied consistency and colour, produced by bees from materials collected from various parts of the plants. It has a complex chemical composition, which depends on the regional flora. Therefore, there are various types of propolis, making comparison between them a difficult task. In the present study, a survey of studies with propolis from the state of Bahia, Brazil, was carried out. We identified 17 scientific papers and eight patents dealing with propolis produced in Bahia. In these works three amongst the 13 types of propolis reported in Brazil were listed. Almost all studies report the antimicrobial activity potential of propolis types 6, highlighting its low percentage of flavonoids. It was also noted that the incentive given to the production of propolis type 13 in Bahia, also known as “própolis vermelha”, is due to the overall aggregate value of this product.

scholarly journals Linalool and methyl chavicol present basil (Ocimum sp.) cultivated in Brazil

2013 ◽  
Vol 15 (2) ◽  
pp. 309-311 ◽  
Author(s):  
R.A. de Oliveira ◽  
I.S. Moreira ◽  
F.F. Oliveira
Keyword(s):  
Chemical Composition ◽  
Medicinal Plants ◽  
Essential Oils ◽  
Complex Chemical ◽  
Methyl Chavicol ◽  
Ocimum Species ◽  
Complex Chemical Composition

In Brazil, Ocimum species are commonly known as aromatic and restorative herbs. The present research aimed to study the chemical composition of the essential oils of fresh and dry basil (Ocimum sp) leaves obtained by hydrodistillation and analyzed by GC-FID and GC-MS. The obtained yield was 0.70% for dry leaves and 0.26% for fresh leaves. The major compounds were: linalool (29.50-32.26%) and methyl chavicol (36.81-41.62%). Eucalyptol could also be detected (9.99-7.68%). The oil from dry leaves presented a more complex chemical composition. This study serves to contribute to the knowledge of medicinal plants occurring in Brazil.

Sign in / Sign up

Export Citation Format

Share Document