403 articles for “high concentration”

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Research ArticleOpen accessPhrase in the titleSimplification of Sun Tracking Mode to Gain High Concentration Solar EnergyOmar Aliman, Ismail Daut, Muzamir Isa, Mohd Rafi AdzmanPower conversion from solar thermal energy to electrical energy is still very cost-intensive. Serious effort has to be given in the development of the concentrator or heliostat structure expenditure which contributing the most expensive component in a central receiver solar power plant. With current development to find alternatives and lower down the capital, a new mode of sun tracking has … …American Journal of Applied Sciences, Vol. 4, Issue 3 · 31 Mar 2007 · 7,187 accessesView PDF Cite

Research ArticleOpen accessPhrase in the titleHigh Concentrations of Glucose can Activate or Inhibit Human Erythrocyte Aminolevulinate Dehydratase in vitro Depending Exposure TimeJ. C. Soares, D. Gabriel, V. Folmer et al.Hyperglycemia can cause oxidative stress and inactivate susceptible enzymes. In the present investigation we examined whether short-term incubations (24 or 48 h) with high concentrations of glucose (10-200 mmol L-1) inhibit ALA-D from human erythrocytes. Incubations of erythrocytes for 24 h with glucose (10 up to 40 mmol L-1) resulted in an increase of δ-ALA-D activity (P<0,001). Incubations of erythrocytes … …American Journal of Biochemistry and Biotechnology, Vol. 2, Issue 4 · 31 Dec 2006 · 6,686 accessesView PDF Cite

Research ArticleOpen accessEvery word in the titleStress Resistance Physiological Traits in Maize Under High-Concentration Salt StressMingxia WangTo quantitatively analyze the stress-resistant physiological characteristics of maize under high-concentration salt stress, a combination of statistical analysis and quantitative recursive analysis is selected to conduct salt stress experiments on maize seedlings. 20 treatments are set up, with each treatment consisting of 5 pots and 3 plants per pot. The experiment is conducted without the involvement of any animals. Physiological … …American Journal of Biochemistry and Biotechnology, Vol. 20, Issue 1 · 26 Apr 2024 · 4,868 accessesView PDF Cite

Research ArticleOpen accessEvery word in the titleCharacteristics of Lipoprotein Peak x Eluted from a Column with the Eluent of High-magnesium Ion Concentration in Lipoprotein Analysis Using the Cation-exchange ChromatographyYuji Hirowatari, Hiroshi Yoshida, Yutaka Ogura et al.The new lipoprotein analysis method using a cation-exchange chromatography, which contains a sulfopropyl-ligand column and two magnesium ion-containing eluents was previously reported. This method can separate serum lipoproteins on the column gel with a magnesium ion concentration gradient and high-density lipoprotein (HDL), low-density lipoprotein (LDL), very-low-density lipoprotein (VLDL) and an unspecified lipoprotein peak are eluted in order from the column. … …American Journal of Biochemistry and Biotechnology, Vol. 1, Issue 3 · 30 Sep 2005 · 6,473 accessesView PDF Cite

Research ArticleOpen accessIn the abstractCadmium Stress Responses in Medicinal and Oilseed Plants: Safflower as a Promising Candidate for Soil Cadmium RemediationChristos Kikis, Giorgos Thalassinos, Vasileios AntoniadisThis study investigated the growth responses of five economically important plants—chamomile (Matricaria recutita), oregano (Origanum vulgare), safflower (Carthamus tinctorius), sage (Salvia officinalis), and wormwood (Artemisia absinthium) exposed to increasing Cd levels. Over 60 days, plants were subjected to Cd concentrations of 0, 1, 2, 3, and 4 mg per pot. Growth parameters and Cd accumulation were then assessed. At the … …American Journal of Agricultural and Biological Sciences, Vol. 20, Issue 1 · 13 Nov 2025 · 3,410 accessesView PDF Cite

Research ArticleOpen accessIn the abstractCharacterization of Fructan Content from Stem Juices of Different Varieties of Agave Atrovirens, Traditionally Used for the Production of Pulque. Production of a Sweetening Syrup by Chemical and Enzymatic ProcessingKaren Gott-Bravo, Arnulfo Pluma-Pluma, Victor Eric López-López et al.Agave atrovirens, the hardiest species of Agave in Mexico, thrives in tough, infertile soils and extreme temperatures across a wide range of altitudes, particularly in impoverished rural areas of Central and Northern Mexico. Its potential for agroindustrial use could offer a pathway to social and economic prosperity for many communities. Traditionally, A. atrovirens is tapped for its sap, known as … …American Journal of Agricultural and Biological Sciences, Vol. 19, Issue 1 · 4 Mar 2025 · 7,670 accessesView PDF Cite

Research ArticleOpen accessIn the abstractHepato and Nephrotoxicity Caused by Sub-Chronic Exposure to Relevant Concentrations of Human Exposure to Glyphosate-Based Herbicide: An Experimental Study in RatsFernanda de Maria Serra, Letícia Rocha Magalhães, Beatriz Bertholace Magalhães Silva et al.Glyphosate's remarkable effectiveness in weed control has made it among the foremost widely employed herbicides globally. Several Glyphosate-Based Herbicides (GBHs) contain 1-4 dioxane, a compound known to induce cancer in animals and potentially contribute to liver and kidney damage in humans. The objective was to assess the liver and kidney toxicity resulting from sub-chronic exposure to GBH in rats. Eighty … …OnLine Journal of Biological Sciences, Vol. 24, Issue 2 · 26 Dec 2023 · 5,194 accessesView PDF Cite

Research ArticleOpen accessIn the abstractAnalysis of Indoor CO2 Concentration Using Split Ventilation Systems as an Indicator of COVID-19 TransmissionManuel Batista, Oscar Bulgim, Ericka Matus et al.We measured the indoor CO2 concentration in occupied areas with ventilation systems that recirculate air without an external air supply. The average time required to achieve the highest probability of contagion was also measured based on the number of participants in the group. Three different experimental groups were evaluated: Group One (G1), which included 5 participants; Group Two (G2), with … …American Journal of Applied Sciences, Vol. 20, Issue 1 · 23 Aug 2023 · 6,051 accessesView PDF Cite

Research ArticleOpen accessIn the abstractDetection of Exogenous Heavy Metal Pesticide Residues in Traditional Chinese Medicine Based on Fluorescent Carbon Quantum DotsYanan He, Shuyin WangThe analysis method based on fluorescent probes has received increasing attention due to its high sensitivity, fast response, and real-time visualization characteristics. Therefore, the application of fluorescent probes for rapid detection of heavy metal pesticide residues in traditional Chinese medicine is of great significance. This study innovatively synthesized B/N co-doped carbon quantum dots using 3-aminophenylboronic acid as the raw material, … …American Journal of Biochemistry and Biotechnology, Vol. 22, Issue 1 · 10 Apr 2026 · 1,610 accessesView PDF Cite

Research ArticleOpen accessIn the abstractEffects of Different Extraction Methods on the Quality of Peony Seed Oil and Its Emulsion PropertiesKang Li, Chao Du, Shuxian Pang et al.Peony seed oil, as a functional oil rich in ω-3 polyunsaturated fatty acids and natural antioxidant components, has its extraction process directly affecting the maintenance of bioactive substances and the added value of the product. In this analysis, the effects of wet milling-micronized continuous leaching method (MCI), solvent extraction (SE), soxhlet extraction (SOXE) and ethanol-assisted enzymatic hydrolysis (EAH) on the … …American Journal of Biochemistry and Biotechnology, Vol. 21, Issue 3 · 28 Jan 2026 · 1,955 accessesView PDF Cite