Showing papers on "Potassium iodate published in 2019"

Iodine Accumulation and Tolerance in Sweet Basil (Ocimum basilicum L.) With Green or Purple Leaves Grown in Floating System Technique.

Abstract: Iodine deficiency is a serious world-wide public health problem, as it is responsible for mental retardation and other diseases. The use of iodine-biofortified vegetables represents a strategic alternative to iodine enriched salt for people with a low sodium diet. However, at high concentrations iodine can be toxic to plants. Therefore, research on plant iodine toxicity is fundamental for the development of appropriate biofortification protocols. In this work, we compared two cultivars of sweet basil (Ocimum basilicum L.) with different iodine tolerance: "Tigullio," less tolerant, with green leaves, and "Red Rubin," more tolerant and with purple leaves. Four greenhouse hydroponic experiments were conducted in spring and in summer with different concentrations of iodine in the nutrient solution (0.1, 10, 50, 100, and 200 μM), supplied as potassium iodide (KI) or potassium iodate (KIO3). Plant growth was not affected either by 10 μM KI or by 100 μM KIO3, while KI concentrations higher than 50 μM significantly reduced leaf area, total plant dry matter and plant height. The severity of symptoms increased with time depending on the cultivar and the form of iodine applied. Growth inhibition by toxic iodine concentrations was more severe in "Tigullio" than in "Red Rubin," and KI was much more phytotoxic than KIO3. Leaf iodine concentration increased with the iodine concentration in the nutrient solution in both varieties, while the total antioxidant power was generally higher in the purple variety. In both basil cultivars, a strong negative correlation was found between the photosynthesis and the leaf iodine content, with significant differences between the regression lines for "Tigullio" and "Red Rubin." In conclusion, the greater tolerance to iodine of the "Red Rubin" variety was associated with the ability to withstand higher concentrations of iodine in leaf tissues, rather than to a reduced accumulation of this element in the leaves. The high phenolic content of "Red Rubin" could contribute to the iodine tolerance of this purple cultivar.

A Useful Synthesis of 2-Acylamino-1,3,4-oxadiazoles from Acylthiosemicarbazides Using Potassium Iodate and the Discovery of New Antibacterial Compounds.

Abstract: A useful method for the synthesis of 2-acylamino-1,3,4-oxadiazoles was developed. By using potassium iodate as an oxidant in water at 60 °C, a wide range of 2-acylamino-1,3,4-oxadiazoles were afforded in moderate to excellent yields within two hours. This method could provide a facile shortcut to generate a series of 2-acylamino-1,3,4-oxadiazoles in medicinal chemistry. Interestingly, some highly potent antibiotic compounds were found through this synthetic method, and some of them displayed a significant improvement in activity compared with the corresponding 1,4-diacylthiosemicarbazides. Compound 2n was the most active against Staphylococcus aureus with MIC (minimum inhibitory concentration) of 1.56 mg/mL, and compounds 2m and 2q were the most active against Bacillus subtilis with MIC of 0.78 mg/mL. The preliminary cytotoxic activities of the most potent compounds 2m, 2n, and 2q against the androgen-independent (PC-3) prostate cancer cell line were more than 30 μM (IC50 > 30 μM).

New approaches for efficient removal of some radionuclides and iron from rare earth liquor of monazite processing

Abstract: In this article, new two approaches (A and B) are created for the efficient removal of the technically enhanced radium isotopes (228Ra, 226Ra and 223Ra), long-lived radioisotope of lead (210Pb), thorium (Th4+) and iron (Fe3+) from the rare earth chloride (RECl3) liquor produced during the monazite processing. In the first approach ‘A,’ elimination of the undesired species is achieved using a synergistic admixture of sulfate–sulfide solution (SO42−/S2− admixture), while the second approach ‘B’ is performed using an iodate solution (IO3−) as a selective precipitating agent. The results indicated that 14% of radionuclides and Th(IV), 12% of Ln(III) and 40% of Fe(III) were removed from the RECl3 liquor at pH 3. In the first approach ‘A,’ the average percentage removal (%R) of all the undesired species reached ~ 96% using sulfate–sulfide admixture (0.058/0.04 mol/L). In the second approach ‘B,’ the average % R of all undesired species is improved and increased to ~ 99% using potassium iodate solution of 0.155 mol/L. Therefore, iodate solution is considered as an efficient and selective agent for the removal of Ra isotopes, 210Pb, Th(IV) and Fe(III) from RECl3 liquor without loss in Ln(III) at the optimized conditions. In this respect, promising results are obtained for the purification and production of Ln(III) using iodate solution or sulfate–sulfide admixture. Finally, the proposed two approaches are considered to be efficient not only to minimize the radiological human risks but also to eliminate the interfering of Th and Fe ions, to produce highly purified lanthanides from monazite ore.

Intermediate infrared optical doubling frequency crystal fluorinated tungsten potassium iodate material as well as preparation and application thereof

Abstract: The invention relates to an intermediate infrared optical doubling frequency crystal fluorinated tungsten potassium iodate material as well as preparation and application thereof. The chemical formulaof the intermediate infrared optical doubling frequency crystal fluorinated tungsten potassium iodate material is K5(W3O9F4)(IO3); the intermediate infrared optical doubling frequency crystal fluorinated tungsten potassium iodate material belongs to a monoclinic crystal system, and has a space group of Pm, and cell parameters (a is equal to 9.7 to 9.8 angstrom, be is equal to 3.7 to 3.8 angstrom,and c is equal to 10.9 to 11.0 angstrom); alpha and gamma are equal to 90 degrees, beta is equal to 101.9 to 102.8 degrees, and Z is equal to 1; cell volume V is 381 to 401 angstrom. Compared with the prior art, the intermediate infrared optical doubling frequency crystal fluorinated tungsten potassium iodate material disclosed by the invention has the advantages that under the irradiation of 1064nm laser, frequency doubling effect strength of powder is about 11 times that of potassium dihydrogen phosphate crystal; under the irradiation of 2.10mu m, the measured frequency doubling effect strength of the powder is equivalent to that of potassium titanium oxide phosphate. Under the laser with the wavelength of 1064nm, a measured laser-damaged threshold of the powder is 95 times that of commercialized infrared second-order nonlinear materials silver, gallium and sulfide; the crystal material has wide transparent range in visible light and an infrared region; a transmittance waveband is 0.32 to 10.5mu m; the intermediate infrared optical doubling frequency crystal fluorinated tungsten potassium iodate material has broad application range in the fields of laser frequency conversion, electrooptical modulation, laser signal holographic storage and the like.

Effect of iodine biofortification on incidence and severity of Fusarium wilt and yield of tomato ( Solanum lycopersicum L.)

Abstract: Tomato is often attacked by wilt caused by Fusarium oxysporium . Iodine is known to have fungistatic effect in pathogen control. The present experiment was aimed at determining the effect of iodine compounds (potassium iodide, KI and potassium iodate, KIO 3 ) on incidence and severity of Fusarium wilt and yield of two tomato accessions, FUNAABTO/106 and FUNAABTO/123. The experiment was conducted in the screenhouse and on the field. KI was applied at concentrations of 1, 2, 3, 5 mM while KIO 3 was applied at concentrations of 0.5, 1, 2, 3 mM. The untreated plots served as control. Results showed that FUNAABTO/106 treated with 0.5 mM KIO 3 in the screenhouse and on the field had the least (0.00%) disease incidence. Disease severity was significantly (p ≤ 0.05) lower (1.00) in the screenhouse in pots containing FUNAABTO/106 treated with 1 mM KIO 3 . On the field, FUNAABTO/106 treated with 0.5 mM KIO 3 had the least (1.17) disease severity. FUNAABTO/106 treated with 0.5 mM KIO 3 in the screenhouse and on the field were significantly higher (1.65t/ha and 18.54t/ha respectively) in yield. The study concluded that application of iodine compounds at lower concentrations reduced the incidence and severity of Fusarium wilt and increased the yield of tomato. Keywords: Potassium iodate (KIO 3 ), Potassium iodide (KI), Fusarium oxysporium

Double salt fortification with iodine and iron: An in vivo study on albino rat

Abstract: Iron, iodine and vitamin A deficiencies are major clinical conditions affecting 33% of global population Dual fortification of salt with iron and iodine could be a sustainable approach to fight against Iron Deficiency Anaemia (IDA) and Iodine Deficiency Disorders (IDD) The present work was designed to analyse the bioavailability of iron and iodine fortificants For this reason, common table salt (NaCl) was subjected to various analyses like moisture, ash and minerals followed by double salt fortification with iron compounds like sodium iron ethylene diamine tetra acetate (NaFeEDTA), iron(II) sulphate (FeSO4) and potassium iodate (KIO3) at two different levels Bioavailability of iron and iodine fortificants was analysed by feeding albino rats with fortified salt at 35% Serum thyroxin (T4) level increased significantly from day 0 to 28 (2672 +/- 02 to 3141 +/- 04 mnol/L) Haemoglobin (Hb) and serum ferritin levels also depicted significant increase with the passage of time However, whole blood zinc protoporphyrin, serum transferrin and serum triiodothyronine significantly decreased As a conclusion, the present work revealed that double fortification of salt with iron and iodine along with a suitable stabiliser could be an effective strategy to control the two major micronutrient deficiencies (C) All Rights Reserved

Method of detecting doped exogenous chemical potassium iodide in iodine alginate via potassium iodate

Abstract: The invention discloses a method of detecting doped exogenous chemical potassium iodide in iodine alginate via potassium iodate. Potassium iodate with low concentration is utilized to oxidize exogenous potassium iodide doped in iodine alginate; whether exogenous chemical potassium iodide is added to iodine alginate is detected under acid conditions without destroying active structure of iodine alginate. The method herein is simple and feasible, has high efficiency and good convenience and is suitable for identifying whether potassium iodide is added to commercial iodine alginate, so that people's health and benefit are guaranteed.

Detection reagent and method for urinary and salivary iodine via microplate reader after normal-temperature pretreatment

Abstract: The invention discloses a detection agent for urinary and salivary iodine via a microplate reader after normal-temperature pretreatment. The agent is characterized by comprising an agent A, a 0.5-2.2mol/L of sodium hypochlorite solution NaClO in which Mr=74.44; an agent B, a 0.5-2.2mol/L of sulphuric acid solution H2SO4 in which Mr=98.078; an agent C, a0.01-0.2mol/L of arsenous acid solution H3AsO3; an agent D, a 0.01-0.2mol/L of ammonium cerous sulphate solution Ce(NH4)(SO4)4.H2O in which Mr=632.6, and a calibration liquid, a iodine standard series solution (a Potassium Iodate solution KIO3,Mr=214.0).

Method of measuring iodide ions in ammonium fluoride or ammonium bifluoride

Abstract: The invention discloses a method of measuring iodide ions in ammonium fluoride or ammonium bifluoride. An ammonium fluoride or ammonium bifluoride sample is dissolved with water; treatment is carriedout with a cationic exchange resin column to remove interfering cations; bromine water is added into a mixed acid medium of phosphorus acid and perchloric acid; water bathing is performed in water bath at 75-85 DEG C so that all iodine in the solution is oxidized into iodate radicals; sodium formate is added to remove excessive bromine water; reacting is maintained in the water bath at 75-85 DEG Cuntil the solution is colorless; the solution is extracted and cooled to room temperature; potassium iodate and starch solution are added before standing; a spectrophotometer is then used to measureabsorbance of the obtained solution; iodine content is attained by a working curve process. The method has the advantages of low matrix disturbance, low environmental pollution and low results fluctuation.

Iodometric determination of glucose and ribose using potassium iodate as novel reagent in acetic acid medium

Abstract: Glucose is the major carbohydrate found in blood and a chief source of energy in human body. The blood glucose levels are perfectly maintained under the influence of hormones like insulin. However the hormonal imbalance sometimes may result in abnormalities of glucose metabolism and results in diseased condition.1 Thus the detection of blood glucose levels can provide a basic understanding of the malfunctioning of the tissues and body. Although various methods are reported in the literature for the determination of glucose, few are commonly used via, colorimetric method, Benedict’s method,2 Bertrand’s method,3 Hagedorn-Jenson method,4 chloramine-T5 method etc.

Diamond micro-powder chemical nickel-plating formula and process

Abstract: The invention discloses a diamond micro-powder chemical nickel-plating formula and process. The diamond micro-powder chemical nickel-plating formula includes 20-30 g/L of nickel sulfate hexahydrate, 30-35 g/L of sodium hypophosphite, 15-25 g/L of citric acid, 12.5-22.5 g/L of ammonium hydroxide, 12.5-17.5 g/L of sodium citrate, 1-5 mg/L of thiourea, 2-10 mg/L of potassium iodate, 0.1-1.5 g/L of polyethylene glycol 4000 and 0.1-1.5 g/L of dodecylbenzene sulfonic acid. The process comprises the steps of adding diamond micro-powder at the loading capacity of 2-10 g into 400 mL of a plating solution; conducting ultrasonic dispersion for 5 min, then conducting water-bath heating at 75-90 DEG C and conducting chemical nickel plating at the stirring speed of 120 r/min. According to the diamond micro-powder chemical nickel-plating formula and process, citric acid and ammonium hydroxide are added on the basis of sodium citrate; the anti-corrosion capability of a plating coating obtained througha compound complex agent is higher than that of the plating coating obtained through a single complex agent. Interspaces of a single complex compound through the compound complex agent are filled. The structure is more compact. The complex compound becomes stable. Moreover, the deposition velocity is increased to some extent.