Synergistic reaction between SO2 and NO2 on mineraloxides: a potential formation pathway of sulfate aerosol

2012 ◽  
Vol 14 (5) ◽  
pp. 1668-1676 ◽  
Author(s):  
Chang Liu ◽  
Qingxin Ma ◽  
Yongchun Liu ◽  
Jinzhu Ma ◽  
Hong He
Keyword(s):  
Sulfate Aerosol ◽  
Formation Pathway ◽  
Potential Formation ◽  
Synergistic Reaction

Heterogeneous reaction of Cl2 and NO2 on γ-Al2O3: A potential formation pathway of secondary aerosols

2018 ◽  
Vol 188 ◽  
pp. 25-33 ◽  
Author(s):  
Siqun Tang ◽  
Lingling Ma ◽  
Min Luo ◽  
Zhaohui Zhang ◽  
Xingzhong Cao ◽  
...  
Keyword(s):  
Heterogeneous Reaction ◽  
Formation Pathway ◽  
Potential Formation ◽  
Secondary Aerosols

scholarly journals High-resolution Imaging of Transiting Extrasolar Planetary systems (HITEP)

2018 ◽  
Vol 610 ◽  
pp. A20 ◽  
Author(s):  
D. F. Evans ◽  
J. Southworth ◽  
B. Smalley ◽  
U. G. Jørgensen ◽  
M. Dominik ◽  
...  
Keyword(s):  
Target Selection ◽  
High Mass ◽  
Line Of Sight ◽  
Companion Star ◽  
Formation Pathway ◽  
Hot Jupiters ◽  
Potential Formation ◽  
History Of ◽  
Host Stars ◽  
Hot Jupiter

Context. The formation and dynamical history of hot Jupiters is currently debated, with wide stellar binaries having been suggested as a potential formation pathway. Additionally, contaminating light from both binary companions and unassociated stars can significantly bias the results of planet characterisation studies, but can be corrected for if the properties of the contaminating star are known. Aim. We search for binary companions to known transiting exoplanet host stars, in order to determine the multiplicity properties of hot Jupiter host stars. We also search for and characterise unassociated stars along the line of sight, allowing photometric and spectroscopic observations of the planetary system to be corrected for contaminating light. Methods. We analyse lucky imaging observations of 97 Southern hemisphere exoplanet host stars, using the Two Colour Instrument on the Danish 1.54 m telescope. For each detected companion star, we determine flux ratios relative to the planet host star in two passbands, and measure the relative position of the companion. The probability of each companion being physically associated was determined using our two-colour photometry. Results. A catalogue of close companion stars is presented, including flux ratios, position measurements, and estimated companion star temperature. For companions that are potential binary companions, we review archival and catalogue data for further evidence. For WASP-77AB and WASP-85AB, we combine our data with historical measurements to determine the binary orbits, showing them to be moderately eccentric and inclined to the line of sight (and hence planetary orbital axis). Combining our survey with the similar Friends of Hot Jupiters survey, we conclude that known hot Jupiter host stars show a deficit of high mass stellar companions compared to the field star population; however, this may be a result of the biases in detection and target selection by ground-based surveys.

Identification of dipyrrolone pigments and their precursors formed in the Maillard reaction of carnosine and pentose under weakly acidic conditions

2021 ◽  
Author(s):  
Yuri Nomi ◽  
Kento Yamazaki ◽  
Yuki Mori ◽  
Hitoshi Matsumoto ◽  
Shinji Sato
Keyword(s):  
Maillard Reaction ◽  
Free Amino ◽  
Absorption Maximum ◽  
Group Analysis ◽  
Amino Compound ◽  
Formation Pathway ◽  
Amadori Compound ◽  
Potential Formation ◽  
Acidic Conditions ◽  
Yellow Pigments

Abstract Colored compounds formed by the Maillard reaction of carnosine with xylose or glucose were investigated in this study. Yellow pigments showing an absorption maximum at 450 nm were found in a heated solution of carnosine with xylose at pH 5.0. These pigments were then isolated and identified as dicarnosyl-dipyrrolones A and B. The generation of dipyrrolones in the absence of lysine suggests that dipyrrolone pigments can be formed by pentose as well as every amino compound such as amino acids, peptides and proteins possessing a free amino group. Analysis of α-dicarbonyls using LC-MS/MS showed that pentosone, 1-deoxypentosone, 3-deoxypentosone (3-DP), and methylglyoxal were predominantly generated via degradation of Amadori compounds. Also, a potential formation pathway of dypyrrolones was established, indicating that an Amadori compound which could form 3-DP is likely to play a role as a main precursor for dipyrrolones.

Industrial Labour Force of Russia in 20-30s of XX Century in Russian Historiography

2020 ◽  
pp. 431-449
Author(s):  
Oleg V. Shekatunov ◽  
Konstantin G. Malykhin
Keyword(s):  
Labour Force ◽  
Historical Period ◽  
Russian Industry ◽  
Wide Range ◽  
Scientific Papers ◽  
Potential Formation ◽  
The Moment ◽  
Force Potential ◽  
Modern Russian

The article is devoted to the specifics of studying the industrial labour force of Russia in the 1920s - 1930s in Russian historiography. The various stages of study from the 1920s through the 1930s and up to the last years are concerned. The relevance of the study is due to several factors. These include contradictions in the assessments of Bolshevik modernization of the 1920s and 1930s; projected labour force shortages in modern Russia; as well as the existing labour force shortage in industry at the moment. This determines the relevance of studying the historical period, which was characterized by the most acute personnel problems in the country. The novelty of the study is due to the fact that in modern Russian historiography there is no holistic, integrated view of the problems of the labour force potential formation of Russian industry in the 1920s and 1930s. It is noted that there is no research aimed at analyzing the historiography of these problems. The main stages of the study of industrial labour force are highlighted. The analysis of scientific works correlated with each stage of the study of the topic is performed. The problems and methodology of each stage are considered. A review of a wide range of scientific papers both articles and thesis is presented.

The concepts and features of the models of venture investment of energy-oriented startups

2019 ◽  
pp. 74-78
Author(s):  
Oleh Pankiv
Keyword(s):  
Power Plants ◽  
Public Procurement ◽  
Financial Resources ◽  
Managerial Decisions ◽  
Potential Formation ◽  
The Difference ◽  
Alternative Sources ◽  
Methodological Principles ◽  
Profile Characteristics ◽  
Start Ups

The theoretical and methodological principles of promising managerial decisions concerning the efficiency of attracting financial resources, as well as creation of fundamentally new sources of funding for the development of energy-oriented start-ups are considered. The role and place of the sectors of innovative energy saving and alternative sources of power supply in a complex system of energy independence of the country are determined. The way and the main directions of research and development of the ways to solve the aforementioned problem are outlined. As part of the search for optimization solutions, it is suggested to use the principles of the existing statistical and mathematical apparatus, marketing achievements and achievements in network development that take place in gaming business. An analogue comparison of the principal models was carried out, during which the existing types of energy-oriented start-ups were determined and presented. A separate direction in the economic search is proposed, and its profile characteristics are outlined. The type of model is typical for Ukrainian conditions. The author proposed a method of comparing strategies for attracting financial resources into a gaming business in the core of the research. To solve the investigated problem, it is proposed to apply the property of the law of the emergence. The analysis is based on a concrete example of the functioning of the tender procedure, namely the organization of public procurement. The purpose of the article is to consider and analyze the author's proposal to focus on such an important phenomenon as the constant creation of the difference between the expected price and the final contractual price. The model of the solution is based on the systematic combination of this phenomenon and the administrative stimulation of implementation of exclusively energy-innovation projects. The combination of these two points is the basis of an optimization policy for the potential formation and maintenance of a state program to search and stimulate the sources of funding for power plants.

Structure and Activity of Pentacyclic Triterpenes Codrugs. A Review

2021 ◽  
Vol 21 ◽  
Author(s):  
Justyna Żwawiak ◽  
Anna Pawełczyk ◽  
Dorota Olender ◽  
Lucjusz Zaprutko
Keyword(s):  
Biological Activities ◽  
Anticancer Activities ◽  
Drug Molecule ◽  
Pentacyclic Triterpene ◽  
Formation Pathway ◽  
Chemical Systems ◽  
Drug Molecules ◽  
Wide Range ◽  
Anti Hiv ◽  
Structure And Activity

: Triterpenes are a wide and important group of compounds that have several promising pharmacological properties, such as hepatoprotective, anti-inflammatory, anti-HIV, antioxidant, or anticancer activities. Such potent substances can be successfully incorporated in more complex chemical systems e.g. codrugs or pro-drugs that have better pharmacological profile. The codrug is connected with a drug formation pathway to chemically cohere at least two drug molecules to improve positive therapeutic efficiency or decrease side effects. The codrug can be cleaved in the organism to generate effective compounds previously used as substrates. This article presents an overview of codrugs that consist of pentacyclic triterpene moiety that is chosen as a basic codrug moiety due to their wide range of vital activities and another drug molecule fragment. It was found that triterpenoid codrugs are characterized by a wide range of biological activities. However, most of them have anticancer potency.

scholarly journals The Use of Lavender (Lavandula angustifolia) Essential Oil as an Additive to Drinking Water for Broiler Chickens and Its In Vitro Reaction with Enrofloxacin

Animals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1535
Author(s):  
M. Adaszyńska-Skwirzyńska ◽  
D. Szczerbińska ◽  
S. Zych
Keyword(s):  
Escherichia Coli ◽  
Drinking Water ◽  
Body Weight ◽  
Essential Oil ◽  
Water Consumption ◽  
Broiler Chickens ◽  
Lavender Oil ◽  
Resistant Strains ◽  
Synergistic Reaction

Biological activity of lavender essential oil is a property that can potentially find an application in poultry nutrition. Nowadays, the use of bioactive compounds is encouraged in many areas of industry and agriculture, since these substances have similar properties as withdrawn antibiotic growth promoters. Additionally, antibiotic resistance bacteria are one of the most important current threats to animal health. The purpose of the study was to determine the influence of lavender essential oil on the production parameters and blood parameters in broiler chickens and to assess the lavender oil’s in vitro reaction in a combination with enrofloxacin towards Escherichia coli. One-day-old non-sexed chicks (Ross 308) were divided into three experimental groups, each consisting of 100 individuals (five replicate of 20 boiler chicken each). The chickens in the control group received drinking water with no addition of lavender essential oil. In the experimental groups, lavender oil was added to the drinking water at a concentration of 0.4 mL/L, in the LEO1–42 from 1 to 42 days of age and the LEO22–42 group from the 22 to 42 days of age. The chickens’ body weight, feed consumption, water consumption, deaths and elimination due to health reasons were determined in the experiment. On day 42 of the chickens’ lives, blood samples were collected based on which selected parameters were identified. An in vitro experiment of lavender oil in combination with enrofloxacin was investigated with a checkerboard method. The results of the experiment showed the antimicrobial and antioxidant activity of lavender essential oil and its positive effect on the production results of broiler chickens. The study results proved that the addition of lavender oil positively impacted the chickens’ final body weight and feed conversion ratio (p < 0.01). No differences were observed between the groups for water consumption, death rate and the examined biochemical and immunological blood serum indices. Lavender essential oil was demonstrated to increase the blood serum’s total antioxidant status. A synergistic reaction in vitro was observed for lavender oil combined with enrofloxacin against resistant strains of Escherichia coli. Based on our study, a health-promoting effect of adding LEO to water for broiler chickens was found. Moreover, in vitro studies indicate a significant effect of lavender essential oil on the inhibition of the resistant strains of Escherichia coli growth and synergistic reaction with enrofloxacin.

scholarly journals Insights into antimicrobial agent sulfacetamide transformation during chlorination disinfection process in aquaculture water

RSC Advances ◽  
2021 ◽  
Vol 11 (24) ◽  
pp. 14746-14754
Author(s):  
Yaoguang Guo ◽  
Zhiyuan Liu ◽  
Xiaoyi Lou ◽  
Changling Fang ◽  
Pu Wang ◽  
...  
Keyword(s):  
Antimicrobial Agent ◽  
Systematic Study ◽  
Degradation Kinetics ◽  
Transformation Mechanism ◽  
Chlorination Process ◽  
Disinfection Process ◽  
Potential Formation ◽  
Aquaculture Water

A systematic study for degradation kinetics and transformation mechanism of sulfacetamide antibiotic, and the potential formation of H-DBPs represented by HAAs in the chlorination process is explored.

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