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The Effect of Storage Solutions on mineral content of Enamel

Materials Sciences and Applications 2013年第7期4卷 439-445页

作者： Asli Secilmis Erhan Dilber Nilgun Ozturk Fatma Gokmen Yilmaz Department of Prosthodontics Faculty of DentistryUniversity of GaziantepGaziantepTurkey Department of Prosthodontics Faculty of DentistrySifa UniversityİzmirTurkey Department of Prosthodontics Faculty of DentistryUniversity of SelcukKonyaTurkey Department of Soil Science Faculty of AgriculturalUniversity of SelcukKonyaTurkey

Purpose: This study evaluated the influence of different storage times and storage solutions on the mineral content of enamel. Methods: Ninety enamel slabs were randomly divided into 2 groups of 45: a 45-day group and a 90-day group. Each of these main groups was further subdivided into 9 experimental groups of 5 slabs, and each subgroup was stored in a different storage solution. The mean percentage weights of 5 elements (calcium, potassium, sodium, phosphorus, and magnesium) presented in each enamel slab was measured after storage using inductively coupled plasmaatomic emission spectrometry. Two-way analysis of variance (ANOVA) and Turkey’s honestly significant difference tests were used to analyze differences between the groups. Results: Storage conditions significantly affected the levels of calcium, potassium, sodium, and phosphorus (p 0.05). Storage procedures can significantly affect the calcium, potassium, sodium, and phosphorus contents of enamel.

关键词： Storage Solution Storage Time Enamel ICP-AES mineral content

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RNAi-Mediated Silencing of ITPK Gene Reduces Phytic Acid content,Alters Transcripts of Phytic Acid Biosynthetic Genes,and Modulates mineral Distribution in Rice Seeds

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Rice science 2020年第4期27卷 315-328页

作者： Aritra KARMAKAR Sananda BHATTACHARYA Shinjini SENGUPTA Nusrat ALI Sailendra Nath SARKAR Karabi DATTA Swapan K.DATTA Laboratory of Translational Research on Transgenic Crops Department of BotanyUniversity of CalcuttaKolkata 700019West BengalIndia Plant Nutrition Department Centre Mondial de I’Innovation RoullierSaint Malo 35400France

Phytic acid is the principal storage form of phosphorus in plant seeds and an essential signalling molecule in several regulatory processes of plant ***,it is known as an anti-nutrient compound owing to its potent chelating ***,reducing the phytic acid content in crops is *** involving regulation of MIPS and IPK1 genes to generate low phytate rice have been reported ***,the functional significance of OsITPK and the effect of its down-regulation on phytic acid content and the associated pleiotropic effects on rice have not yet been *** this study,tissue specific RNA interference(RNAi)-mediated down-regulation of a major ITPK homolog(OsITP5/6K-1)resulted in 46.2%decrease in phytic acid content of T2 transgenic seeds with a subsequent 3-fold enhancement in the inorganic phosphorus *** of OsITP5/6K-1 altered the transcript levels of essential phytic acid pathway genes,without significantly affecting the transcript levels of other OsITPK ***,the mapping of elements through X-ray microfluorescence analysis revealed significant changes in the spatial distribution pattern and translocation of elements in low phytate ***,low phytate polished seeds exhibited 1.3-fold and 1.6-fold enhancement in iron and zinc content in the grain endosperm,*** of OsITP5/6K-1 also altered the amino acid and myo-inositol content of the transgenic *** results successfully established that RNAi-mediated silencing of OsITP5/6K-1 gene significantly reduced the phytate levels in seeds without hampering the germination potential of seeds and plant *** present study provided an insight into the mechanism of phytic acid biosynthesis pathway.

关键词： inositol triphosphate kinase-1 phytic acid mineral content RNA interference silencing X-ray microfluorescence

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Importance of aging to dehydration shrinkage of human dentin

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Applied Mathematics and Mechanics(English Edition) 2012年第3期33卷 333-344页

作者：汪饶饶毛霜霜 E.ROMBERG D.AROLA 张东升 Department of Stomatology Shanghai Tenth People's HospitalTongji University School of Medicine Department of Mechanics Shanghai University Shanghai Key Laboratory of Mechanics in Energy Engineering Department of Health Promotion and Policy Baltimore College of Dental SurgeryUniversity of MarylandBaltimoreMD 21201USA Department of Mechanical Engineering University of MarylandBaltimore CountyBaltimoreMD 21250USA Department of Endodontics Prosthodonticsand Operative Dentistry BaltimoreUniversity of MarylandBaltimoreMD 21201USA

There is an increase in the mineral content of human dentin with aging. Due to the consequent changes in the mineral to the collagen ratio, this process may influence the degree of hydrogen bonding that occurs with the loss of water and the extent of shrinkage as a result of dehydration. Thus, the objective of this investigation is to quantify the differences in the dehydration shrinkage of human dentin with patient age. Specimens of coronal dentin are prepared from the molars of young （23 ~〈 age 34） and old （52 ~ age ~〈 62） patients, and then maintained in storage solutions of water or hanks balanced salt solutions （HBSS）. Dimensional changes of the dentin specimens occurring over periods of free convection are evaluated by using the microscopic digital image correlation （DIC）. The results distinguish that the shrinkage of the young dentin is significantly larger than that of the old dentin, regardless of the orientation and period of the storage. The strains parallel to the tubules increase with proximity to the dentin enamel junction （DE J）, whereas the shrinkage largest in the deep dentin （i.e., near the pulp）. increases from the pulp to the DE J, and is the strains in the transverse direction axe the The degree of anisotropy in the shrinkage largest in the young dentin.

关键词： dentin digital image correlation (DIC) mineral content sclerosis shrinkage

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Grafting Enhances Copper Tolerance of Cucumber Through Regulating Nutrient Uptake and Antioxidative System

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Agricultural Sciences in China 2010年第12期9卷 1758-1770页

作者： ZHANG Zi-kun LI Hua ZHAG Yu HUANG Zhi-jun CHEN Kun LIU Shi-qi College of Horticulture Science and Engineering Shandong Agricultural University/State Key Laboratory of Crop Biology Ministry of Science and Technology/Key Laboratory of Horticultural Crop Biology Ministry of Agriculture Tai 'an 271018 P.R.China Dezhou Academy of Agricultural Science Dezhou 253015 P.R.China

An experiment was carried out to determine plant growth, mineral uptake, lipid peroxidation, antioxidative enzymes, and antioxidant of cucumber plants （Cucumis sativus L. cv. Xintaimici） under copper stress, either ungrafted or grafted onto the rootstock （Cucurbitaficifolia）. Excess Cu inhibited growth, photosynthesis, and pigment synthesis of grafted and ungrafted cucumber seedlings and significantly increased accumulation of Cu in roots besides reducing mineral uptake. Cu concentration in roots of grafted cucumber plants was significantly higher than that of ungrafted plants and obviously lower in leaves. The accumulation of reactive oxygen species （ROS） significantly increased in cucumber leaves under Cu stress and resulted in lipid peroxidation, and the levels of ROS and lipid peroxidation were greatly decreased by grafting. Activities of protective enzymes （superoxide dismutase, SOD; peroxidase, POD; catalase, CAT; ascorbate peroxidase, APX; dehydroascorbate reductase, DHAR; glutathione reductase, GR） and the contents of ascorbate and glutathione in leaves of grafted plants were significantly higher than those of ungrafted plants under Cu stress. Better performance of grafted cucumber plants were attributed to the higher ability of Cu accumulation in their roots, better nutrient status, and the effective scavenging system of ROS.

关键词： copper stress grafted cucumber seedling mineral content antioxidative enzymes antioxidant

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Development and Testing of a Method to Estimate the mineral Composition of Ore from Chemical Assays with a View toward Geometallurgy: Application to an Iron Ore Concentrator

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Geomaterials 2022年第4期12卷 70-92页

作者： Laurence Boisvert Claude Bazin Josiane Caron François Lavoie Department of Mining Metallurgical and Material Engineering Laval University Quebec City Canada Quebec Iron Ore Fermont Canada

For complex orebodies in which the valuable metal is carried by several minerals that respond differently to the concentration process, an ore block model should not be characterized solely with elemental assays, as this information is not sufficient to anticipate the mill performances. Data from an iron ore concentrator is used to demonstrate the idea. A method is then proposed to estimate the mineral contents of ore samples from elemental assays. The method can readily be extended to combine the estimation of the mineral contents in the feed of the mill with an estimation of the recovery of these minerals into the products of the concentrator. These mineral recoveries can subsequently be incorporated into a block model to predict the concentrator response to the processing of an ore block.

关键词： Block Model Estimation Geometallurgy Iron Ore Concentrator Mill Performance mineral content Modal

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Genomic and genetic basisof seed nutritional content in Eragrostistef

Genomic and genetic basisof seed nutritional content in Erag...

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2015中国遗传学会大会

作者： Xuewen Wang Micai Zhon Meng Li Srini Chaluvadi Katrien Devos Greg Ziegler Ivan Baxter Jeff Bennetzen Germplasm Bank of Wild Species Kunming Institute of BotanyChinese Academy of Sciences Department of Genetics University of Georgia Department of Plant Biologyand Institute of Plant Breeding Genetics and Genomics(Department of Crop and Soil Sciences)University of Georgia

Tef(Eragrostistef),a tetraploid grass,is the mainstay of Ethiopian agriculture,with more acres planted than in any other *** has one of the bestmineral contentsamong cereals,with similarly high levels only found in another Chloridoid cereal,fiuger *** has high resilience to both drought and waterlogged soils,but its yield is low due to tiny seed size and severe susceptibility to *** have used mutational and other genetic approaches to investigate and help solve these *** is very high in protein and iron,and has more calcium than mother’s ***,we have generated the1st high density genetic map using SNPs in our newly developed genotype-by-sequencing *** new map has2002 SNP markers fora 145-RIL population,and generated 20 major linkage groups sorted into A andB genomes of this *** anchored more than 73%sequences of tef genomic contigs and scaffolds in the SNP genetic map,and more sequences after combining a SSR map,meaning an accomplishment of tef *** have used this map to identify QTL associated mineral content.A total of19 QTL were identified from the analysis of twenty minerals in ***-seqanalysis of developing seeds revealed QTL genes involved in nutritional *** combined with two full genome sequence analyses that have recently been completed,these analyses should undercover candidate genes associated with these traits,thus suggesting routes towards further nutritional improvement of tef and other cereals.

关键词： GBS ionomics mineral content QTL tef genomics

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Macro-and Microelement contents of Fruiting Bodies of Wild-Edible Mushrooms Growing in the East Black Sea Region of Turkey

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Food and Nutrition Sciences 2011年第2期2卷 53-59页

作者： Faik A.Ayaz Hülya Torun Ahmet Colak Ertugrul Sesli Mark Millson Robert H.Glew Department of Biology Karadeniz Technical UniversityTrabzonTurkey Department of Chemistry Karadeniz Technical UniversityTrabzonTurkey Department of Biology Education Karadeniz Technical UniversityTrabzonTurkey National Institute of Occupational Health and Safety(NIOSH) CincinnatiOhioU.S.A Department of Biochemistry and Molecular Biology School of MedicineUniversity of New MexicoAlbuquerqueNew MexicoU.S.A

Eleven different wild-edible mushroom species growing in the Black Sea region of Turkey were analysed for their metal content. Specimens of mushrooms were gathered in Trabzon, Giresun and Ordu and analyzed for 31 minerals, four of which (Be, Sb, Te and Ti) were not detected. Whereas some minerals including Ag, As, Cd, La, Mo, Pb, Se, Y and Zr were detected in just a few mushroom species, another 18 minerals were found in all 11 species. All metal concentrations were expressed on a dry weight basis (d.w.). With regard to nutritionally important amounts of essential and trace minerals, the metal content (μg/g d.w.) of mushroom samples ranged from 21,800-39,800 for K, 2590-14,000 for P, 268-1600 for Ca, 561-1210 for Mg, 74-829 for Fe, 11.2-321 for Cu, 36.2-241 for Zn, 14.1-76.5 for Mn and 0.13-2.85 for Co. Small amounts of toxic metals such as As, Cd and Pb were found in all 11 mushroom species. L. laccata contained a large amount of As (145 μg/g d.w.). These results show that the investigated mushrooms can be a useful component for human diets because of their high content of many essential minerals and trace elements and low content of toxic metals.

关键词： Wild-edible Mushrooms mineral content Toxic Metals Trace Elements Turkey

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