Effect Of Organic Substances Research Articles

強酸性電解水中の残留塩素に対する有機物の影響

野菜洗浄への利用を考え,強酸性電解水に対する有機物の影響について,次亜塩素酸ナトリウム溶液と比較することにより検討を行った.結果は以下のようになった.(1) キャベツ汁を次亜塩素酸ナトリウム溶液に添加し,その残留塩素の変化を測定したところ,残留塩素の約85%が窒素化合物と反応し,残りの約15%は窒素化合物以外の物質に消費されているものと考えられた.(2) アンモニアを強酸性電解水および次亜塩素酸ナトリウム溶液に添加し,残留塩素の変化を調べたが,2つの溶液のpHを同一にすると,ほぼ同じ挙動を示した.(3) キャベツ汁を強酸性電解水に添加し,残留塩素の変化について検討したが,pHを強酸性電解水と同じにした次亜塩素酸ナトリウム溶液と,同様な反応を示した.このことから,通常における強酸性電解水と次亜塩素酸ナトリウム溶液の挙動の差は,pHの違いが大きく影響しているものと推察された.(4) キャベツ汁に含まれる物質で,窒素化合物以外で残留塩素を消費するものは,ポリフェノール類とL-アスコルビン酸が主なものであると考えられた.(5) シュウ酸を強酸性電解水および次亜塩素酸ナトリウム溶液に添加し,残留塩素の変化を調べたが,2つの溶液の挙動の差は,pHおよびイオン濃度に影響を受けることが示唆された.

Association of fallout-derived [formula omitted] and [formula omitted] with natural organic substances in soils

Activity concentrations and associations of fallout-derived Cs, Sr and Pu in soils were investigated. The activity concentrations of 137 Cs, 90 Sr and 239,240 Pu in volcanic ash soil were much higher than those in granite soil. They decreased with increasing depth in the soil. The activity ratios of 239,240 Pu/ 137 Cs and 90 Sr/ 137 Cs tended to increase slightly with increasing soil depth. Alkali extraction experiments with 0.1 M NaOH solution showed that the percentage activities of the fallout radionuclides found in the organic acid fractions were in the order 239,240 Pu> 90 Sr> 137 Cs . The concentrations of 137 Cs and 239,240 Pu reacted with humic fractions were higher than those with fulvic fractions. In contrast to 137 Cs and 239,240 Pu, 90 Sr reacted more with fulvic fractions than with humic fractions. These results provide information about the effects of organic substances on the retention and migration of 137 Cs, 90 Sr and 239,240 Pu in soils under natural conditions.

Effects of organic acids and solvents in inductively-coupled plasma emission spectrometry

Spectral interferences of the CN band emissions with the analytical lines of rare earths and yttrium were examined in the presence of organic acids or solvents in aqueous sample solutions. The CN band intensity varied with the organic substances as well as with plasma operating conditions. Spectral line intensities of rare earths and yttrium were enhanced by the presence of ethanol, acetone or acetic acid, but suppressed by citric acid. The effects of organic substances on sample uptake rates and intensity distributions along the plasma axis were also investigated.

The effect of organic substances upon the absorption of cathodically produced hydrogen by iron in electrolyte solutions

The effect of organic substances upon the absorption of cathodically produced hydrogen by iron in electrolyte solutions

The Effect of Amino Acids on the Growth of Rice Seedings under Aseptic Culture : The Effect of Organic Substances on the Growth of Higher Plants (Part 2)

The Effect of Amino Acids on the Growth of Rice Seedings under Aseptic Culture : The Effect of Organic Substances on the Growth of Higher Plants (Part 2)

Effect of Organic Substances on the Growth of Higher Plants (Part 1) A New Device of Sterile Water Culture Apparatus and Excretion of Some Enzymes by Rice Plant Root

Effect of Organic Substances on the Growth of Higher Plants (Part 1) A New Device of Sterile Water Culture Apparatus and Excretion of Some Enzymes by Rice Plant Root

The effect of organic substances on the transfer of oxygen from air bubbles in water

AbstractThe liquid film coefficient is related to bubble diameter and velocity in pure water and to the physical properties of the liquid. The addition to water of organic substances which influence the surface tension and viscosity will decrease the size of the air bubble released from a diffuser and reduce the transfer of oxygen into the solution. The maximum reduction in oxygen transfer occurs in the region of maximum surface tension change. The effect of the addition of several organic substances on the oxygen transfer characteristics are shown.

OXYGEN ABSORPTION IN BUBBLE AERATION PART 1.

1) Oxygen absorption rates in bubble aeration were determined polarographically together with the photographic observations of aeration.2) Calculating the interfacial area of bubbles, oxygen transfer coefficients which are free from undesirable effects were determined under an assumption that the liquid film resistance is controlling.3) Using pure oxygen gas, in which no gas film exists, the above assumption was found reasonable in a range of this experimentation.4) The volume-surface mean and the ascending velocity of bubbles do not differ markedly in a range of air flow rates of these experiments. Thus, the liquid film coefficient seems to be independent of the air flow rate.5) Effects of organic substances on the liquid film coefficient were studied.

The effect of organic substances on the growth of the freshwater alga Monodus subterraneus

The effect of organic substances on the growth of the freshwater alga <i>Monodus subterraneus</i>

The effects of organic substances on the upper limits of inflammability of some hydrogen-carbon monoxide-air mixtures

The effect of a large variety of organic substances on the upper inflammability limit of hydrogen-air mixtures has been studied. The effects of the different substances have been compared, and it has been shown that the oxygen-using capacity of the added substance is most important in governing the effect on the limit. However, certain special atoms and groups (e.g. iodide) appear to have appreciable specific, though secondary, effects. The effect of methyl alcohol on the products of combustion and on the limit flame temperatures has also been studied. It appears that the organic substances exert a dual effect on hydrogen limit flames and that, when only small amounts are present, they interfere with the hydrogen-oxygen reaction by removing hydrogen and oxygen atoms and hydroxyl radicals. The upper limits of hydrogen-carbon monoxide-air mixtures have been studied and the effect of varying amounts of n-propyl alcohol, toluene and iso-propyl iodide on them. The effect of water on the carbon monoxide-air upper limit has also been examined. All these results have been considered in an attempt to obtain more information regarding the mechanism of flame propagation, the factors governing the composition at the limits and the limit flame temperatures which have been shown by Egerton &amp; Powling to be very important. The results suggest that, in the systems studied, the reactions that are most important in governing the limits are the branching chain reactions. The part played by radical diffusion has also been discussed.

Effect of Organic Substances on the γ-Ray Oxidation of Ferrous Sulfate

Effect of Organic Substances on the γ-Ray Oxidation of Ferrous Sulfate

Micro-organisms and Plant Growth

THE correspondence (references in the letter by B. Viswa Nath and M. Suryanarayana1) between one Finnish and two Indian groups of workers, on the effect of organic substances upon plant growth, is accenting the need for collaboration between scientific workers. It is indeed curious to note how in this field of plant accessory substances, as in the field of work upon the effects of plants grown in association, workers have remained in ignorance of prior publications even within one country. I make no claim to priority, but, being fortunate in having access to the library of Rothamsted Experimental Station, I am familiar with the papers of most of the workers in both these fields.