Nitrogenous volatiles

The ripe fruit contain approximately 79.50 per cent moisture, 15.25 per cent dry matter, 3.20 per cent crude fibre and little amount of ash. The TSS varies from 10.5-14.5 per cent. Several volatile compounds including hydrocarbons, alcohol and carbonyls have been found to be responsible for the characteristic flavor of guava. The decrease in astringency with advancement of maturity is ascribed to polymerization of leuco-anthocyanins.

7p trinhthamhodang11 27-04-2021 10 1   Download

Air pollution is a heterogeneous, complex mixture of gases, liquids, and particulate matter. Air pollution has become increasingly visible in cities and towns across world. Many factors contribute to air pollution including industry, lack of vehicular emission controls, dirt roads, poor fuel quality, open burning agricultural dust and pesticides and an expanding maquiladora industry. Our plan will lead to reductions in air pollutant emissions that cause smog and acid rain by up to 55% as early as 2018.

7p trinhthamhodang6 09-07-2020 25 2   Download

The effect of rosemary extract and oregano extract was compared with Butylated Hydroxytoluene (BHT) which was incorporated in chitosan film and studied the quality and shelflife of Indian Mackerel (Rastrelliger kanagurta) steaks during ice storage. The quality of the product was analysed by using biochemical methods (peroxide value, free fatty acid, thiobarbituric acid, trimethyl amino nitrogen, total volatile basic nitrogen, pH), microbial methods (total plate count) and sensory quality.

16p angicungduoc5 12-06-2020 19 1   Download

Amino acid-derived aldoximes and nitriles play important roles in plant defence. They are well-known as precursors for constitutive defence compounds such as cyanogenic glucosides and glucosinolates, but are also released as volatiles after insect feeding.

15p vihashirama2711 21-05-2020 12 0   Download

Ocimum sanctum L. or “Tulsi” or Holy basil is a plant well known for its medicinal properties. This plant is rich in essential oil sequestered in peltate glands. The Tulsi is rich source of eugenol, methyl eugenol, chavicol, ursolic acid, rosmerinic acid and other phenolics and terpenes. Aloe barbadensis and Plantago ovata are plants rich in polysaccharides. These plants are very important medicinal plants. A. barbadensis is source of aloin which is used in various cosmetic products and P. ovata is the main source of Isabgol-Husk.

7p nguaconbaynhay4 22-03-2020 14 1   Download

An attempt was undertaken to evaluate the shelf-life of Ready To Eat (fish cutlet) of anchovies (Stolephorus commersonii). Fish cutlet was prepared by following standardized recipe and it was subjected to proximate composition, biochemical, microbiological and organoleptic analysis at an interval of three days during 18 days of storage period. Results for protein, lipid, ash and moisture indicates decreasing trend significantly from 15.14% to 13.26, 12.33% to 10.55%, 2.86% to 2.47% and 60.59% to 57.22% (P < 0.05) respectively.

9p caygaocaolon3 27-02-2020 19 0   Download

In India, fish consumers prefer three types of retail markets viz., local dry fish market, local fresh fish market and supermarket wherein no stringent food safety measures are followed and monitored. Hence, the present study was planned to analyze food safety parameters for different outlets by collecting equal numbers of fish samples from all three markets of Navi Mumbai region. Proximate composition, biochemical and microbiological parameters were evaluated. Antibiogram for the isolated Staphylococcus aureus and Escherichia coli from these fishes was studied.

12p cothumenhmong3 22-02-2020 14 0   Download

Coconut shells were used as a raw material to produce powdered adsorbent carbon of size less than 2mm. The pH, electrical conductivity, proximate analysis (moisture content, volatile matter, ash content and fixed carbon content), ultimate analysis (Carbon, Hydrogen, Nitrogen and Sulphur content), bulk density, particle density, total organic carbon and yield (percentage recovery) were analyzed as per the standard procedures. The raw material of about 20 kg was converted to adsorbent carbon of about 6 kg through thermochemical conversion in the absence of oxygen.

5p nguathienthan2 19-12-2019 16 1   Download

Urea is the most widely used nitrogen (N) fertilizer, with a projected increase in annual demand of 1.5% in the coming years. After its application to soil, urea undergoes hydrolysis via the urease enzyme, causing increases in the soil pH in the surrounding area of the granules and resulting in NH3 losses that average 16% of N applied worldwide and can reach 40% or more in hot and humid conditions. The use of urease inhibitors is an effective way to reduce NH3 losses.

9p trinhthamhodang1 14-11-2019 14 1   Download

The presence of nontraded goods in our model increases the relative volatility of nominal and real exchange rates relative to the volatility in the model without nontraded goods. An important aspect of the behavior of exchange rates in our model with nontraded goods hinges on the agent's inability to optimally share the risk associated with country-speci¯c shocks to productivity in the nontraded goods sector. In response to a (persistent) positive shock to productivity in this sector, agents wish to consume and invest more.

42p dangsuynghi 15-03-2013 47 5   Download

Ozone is a gas that is composed of three oxygen atoms (O3). It is created by the oxides in the air’s nitrogen reaction with volatile organic compounds (VOC). Normally we think of ozone being higher in the atmosphere, also known as “good” ozone. However, when the conditions are right, ozone can occur at ground level, which is known as “bad” ozone. Sunlight and hot weather cause “bad” ozone in harmful concentrations. Thus in the summertime, urban areas have to be concerned about the amount of “bad” ozone. Why do you think urban areas are more...

6p tainhacmienphi 19-02-2013 52 3   Download

Unlike stratospheric ozone that protects life on earth, tropospheric ozone is highly toxic and is the main pollutant of the atmosphere of industrialized countries and cities. Its precursors are emanated from industrial activities and traffic. Generated by lightning, photochemical reactions or with free radicals, it has a density of 1.66 times greater than air and is maintained close to the ground. It decomposes easily, generating free radicals with oxidizing power. The main primary pollutants leading to ozone formation are nitrogen oxides, volatile organic compounds and methane.

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Secondary aerosol is produced by the oxidation of primary gases (sulphur dioxide, SO2, nitrogen oxides, NOx, and volatile organic compounds, VOCs,) to sulphuric and nitric acid, and organic vapours, followed by their gas-particle conversion [26, 77]. Finally, some of these acidic gases can be neutralised by reaction with ammonia gas or calcium carbonate (calcite) forming secondary aerosol (ammonium sulphate, ammonium nitrate, calcium sulphate, calcium nitrate).

56p saimatkhauroi 01-02-2013 50 7   Download

The principal pollutants from the transport sector responsible for adverse health effects include lead, various types of particulate matter, ozone (formed from atmospheric reactions of oxides of nitrogen [Nox] and volatile organic compounds [VOCs]), various toxic VOCs, nitrogen dioxide, carbon monoxide, ammonia and sulphur dioxide. However, the proportion of these various pollutants attributable to the transport sector varies significantly across different cities, as indicated by the table below.

392p saimatkhauroi 01-02-2013 58 5   Download

Bone Meal: Excellent slow-release source of calcium and phosphorus recommended for bulbs, tomatoes, and other vegetables. Analysis will range from 2-12-0 to 4-12-0 with 2 to 5 percent calcium. Slow release form of calcium and phosphorous. It is used for bulbs, tomatoes, and other vegetables. Analysis will range from 2-12-0 to 4- 12-0 with 2 to 5% calcium. A good calcium and phosphorus source but slower acting and more expensive than soft rock phosphate. Analysis of bone meal will vary from about 2-12-0 to 4-12-0 with 2-5 percent calcium.

20p cao_can 02-01-2013 55 2   Download

Remedial strategies for petroleum UST sites that include a combination of active source zone treatment with enhanced natural attenuation outside the contaminant plume core may consider chemical oxidation technologies. Many chemical oxidation techniques also provide residual dissolved oxygen that is used by aerobic microorganisms to biodegrade contaminants. In addition, these technologies may also oxidize reduced electron acceptors (e.g., nitrogen to nitrate, sulfides to sulfate), which are then used by anaerobic microorganisms to biodegrade contaminants.

51p cao_can 29-12-2012 73 5   Download

Combustion units (process furnaces, steam boilers and gas turbines) give rise to emissions of carbon dioxide, nitrogen oxides, sulphur dioxide and particulates. Nitrogen oxide emissions are most commonly reduced by combustion modifications that reduce temperatures and hence the formation of thermal NOx. The techniques include low NOx burners, flue gas recirculation, and reduced pre-heat. Nitrogen oxides can also be removed after they have formed by reduction to nitrogen using Selective Non Catalytic Reduction (SNCR) or Selective Catalytic Reduction (SCR). Water pollutant control.

44p cao_can 29-12-2012 57 2   Download

Ozone (O3) is a secondary pollutant formed in the atmosphere throughout a complex non-linear chemical reaction involving two classes of precursors: the reactive volatile organic compounds (VOCs) and the oxides of nitrogen (NOx) in the presence of sunlight. The rapid urbanization and industrialization in Vietnam have brought about high air pollutant emissions including the O3 precursors. Ground level O3 may already be high in large cities like Hanoi and Ho Chi Minh City. The O3 episode is very important for scene of view of photochemical smog in Hanoi.

7p dem_thanh 22-12-2012 40 4   Download

I was delighted to respond to an invitation from Ventus Publishing to write a book on atmospheric pollution. It is a topic well enough served by books in the past, but has become increasingly important during these early years of the 21st Century. I believe therefore that there is a place for a review like this one and that notwithstanding the immense activity in the area the book will have a reasonable shelf life. This is because it continually relates the discussion to the principles of physics and chemistry, and these do not change....

109p tuanloc_do 04-12-2012 59 2   Download

CHAPTER 65 AIR POLLUTION-CONTROL TECHNOLOGIES C. A. Miller United States Environmental Protection Agency Research Triangle Park, North Carolina 65.1 SULFUR DIOXIDE CONTROL 65.1.1 Control Technologies 65.1.2 Alternative Control Strategies 65.1.3 Residue Disposal and Utilization 65.1.4 Costs of Control 2012 20 1 3 2015 2015 2015 65.5 VOLATILE ORGANIC COMPOUNDS AND ORGANIC HAZARDOUS AIR POLLUTANTS 2022 65.5.1 Conventional Control Technologies 2023 65.5.

19p liemthanh 16-12-2009 169 25   Download