Academic literature on the topic 'Ca 1550-ca 1070 B C'
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Journal articles on the topic "Ca 1550-ca 1070 B C"
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Andrade, Samantha K. Samaniego, István Bakos, Gábor Dobos, Attila Farkas, Gábor Kiss, Szilvia Klébert, János Madarász, and Krisztina László. "Biomass Related Highly Porous Metal Free Carbon for Gas Storage and Electrocatalytic Applications." Materials 14, no. 13 (June 23, 2021): 3488. http://dx.doi.org/10.3390/ma14133488.
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In this paper we report the synthesis of a N, S co-doped metal free carbon cryogel obtained from a marine biomass derived precursor using urea as nitrogen source. Natural carrageenan intrinsically contains S and inorganic salt. The latter also serves as an activating agent during the pyrolytic step. The overall 11.6 atomic % surface heteroatom concentration comprises 5% O, 4.6% N and 1% S. The purified and annealed final carbon (CA) has a hierarchical pore structure of micro-, meso- and macropores with an apparent surface area of 1070 m2/g. No further treatment was applied. The gas adsorption potential of the samples was probed with H2, CO2 and CH4, while the electrocatalytic properties were tested in an oxygen reduction reaction. The atmospheric CO2 and CH4 storage capacity at 0 °C in the low pressure range is very similar to that of HKUST-1, with the CO2/CH4 selectivity below 20 bar, even exceeding that of the MOF, indicating the potential of CA in biogas separation. The electrocatalytic behavior was assessed in an aqueous KOH medium. The observed specific gravimetric capacitance 377 F/g was exceeded only in B, N dual doped and/or graphene doped carbons from among metal free electrode materials. The CA electrode displays almost the same performance as a commercial 20 wt% Pt/C electrode. The oxygen reduction reaction (ORR) exhibits the 4-electron mechanism. The 500-cycle preliminary stability test showed only a slight increase of the surface charge.
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Klyndyuk, Andrey I., and Natalie S. Krasutskaya. "THERMAL EXPANSION AND ELECTRICAL PROPERTIES OF Bi2Ca2O5, Bi2CaO4 AND Bi24Co2O39 DOUBLE OXIDES." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 60, no. 10 (November 16, 2017): 30. http://dx.doi.org/10.6060/tcct.20176010.5588.
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Bi2Ca2O5, Bi2CaO4 and Bi24Co2O39 double oxides are of interest as intermediate phases at preparation of Bi2Ca2Co1,7Oy and (Ca,Bi)3Co4O9+d oxide thermoelectrics and as admixtures to the heterogeneous ceramics based on these layered oxides. In this work Bi2Ca2O5, Bi2CaO4, and Bi24Co2O39 ceramic samples were prepared using solid-state reactions method from Bi2O3, CaCO3, and Co3O4 in air within the temperature range of 923–1143 K. The crystal structure of the samples was studied by X-ray diffraction (XRD) analysis using Bruker D8 XRD Advance with monochromatic CuKa radiation (l = 1.5406 Å). Thermal expansion, electrical conductivity (s), dielectric permittivity (e) and dielectric losses (tgd) of ceramics were studied in air in the temperature range of 290–1070 K. Bi2Ca2O5 crystallizes in the triclinic system (a = 1.01(2) nm, b = 1.01(5) nm, c = 1.05 nm, a = 116.9(1)°, b = 107.14(3)°, g = 92.89°, V = 0.890 nm3, ρXRD = 6.47 g/cm3), Bi2CaO4 - in the monoclinic one (a = 1.664(7) nm, b = 1.162(1) nm, c = 1.402(7) nm, b = 134.17(2)°, V = 1.945(26) nm3, ρXRD = 7.13 g/cm3), and Bi24Co2O39 - in the cubic one (a = 1.021(1) nm, V = 1.063(16) nm3, ρXRD = 9.00 g/cm3). Apparent density values of the sintered ceramics are 5.78, 4.82, and 7.42 g/cm3 for Bi2Ca2O5, Bi2CaO4, and Bi24Co2O39 compounds, respectively. It was found that electrical conductivity of the materials studied had semiconducting character, and increasing in the bismuth oxide content in ceramics leads to the increasing its electrical conductivity, dielectric permittivity, and dielectric losses values. The values of average linear thermal expansion coeffient are equal to 12.9×10–6, 14.7×10–6, and 16.0×10–6 K–1. Activation energy of electrical conductivity are equal to 1.393, 1.159, and 0.499 eV, and temperature of maximum of dielectric losses due to dipole polarization are equal to 923, 780, and 681 К for the Bi2Ca2O5, Bi2CaO4, and Bi24Co2O39 ceramics, respectively. On the temperature dependence of dielectric permittivity of Bi24Co2O39 phase the local maximum at 845 K was detected, which is connnected, obviously, to the partial disordering of dipoles in its crystal structure.Forcitation:Klyndyuk A.I., Krasutskaya N.S. Thermal expansion and electrical properties of Bi2Ca2O5, Bi2CaO4 and Bi24Co2O39 double oxides. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2017. V. 60. N 10. P. 30-35
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Na'aman, Nadav, and Carl S. Ehrlich. "The Philistines in Transition: A History from Ca. 1000-730 B. C. E." Journal of the American Oriental Society 119, no. 1 (January 1999): 161. http://dx.doi.org/10.2307/605572.
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Waldbaum, Jane C. "Early Greek Contacts with the Southern Levant, ca. 1000-600 B. C.: The Eastern Perspective." Bulletin of the American Schools of Oriental Research 293 (February 1994): 53–66. http://dx.doi.org/10.2307/1357277.
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Cano, D., C. F. Gomez, N. Ospina, J. A. Cajigas, H. Groot, R. E. Andrade, and M. M. Torres. "Mitochondrial DNA Haplogroups and Susceptibility to Prostate Cancer in a Colombian Population." ISRN Oncology 2014 (January 28, 2014): 1–11. http://dx.doi.org/10.1155/2014/530675.
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Prostate cancer (PC) is one of the most common cancers and the second leading cause of mortality from cancer in Colombian men. Mitochondrial DNA (mtDNA) haplogroups have been associated with the risk of PC. Several studies have demonstrated dramatic differences regarding the risk of PC among men from different ethnic backgrounds. The present study was aimed at assessing the relationship between mtDNA haplogroups and PC. The mitochondrial DNA hypervariable segment I (HSV-1) was sequenced in a population-based study covering 168 cases (CA) and 140 unrelated healthy individuals as a control group (CG). A total of 92 different mtDNA sequences were found in CA and 59 were found in the CG. According to the geographical origin attributed to each mtDNA haplogroup, 82% of the mtDNA sequences found in both groups were Native Americans (A, B, C, and D). The most frequent was A (41.1%CA–42.1%CG), followed by B (22.0%CA–21.4%CG), C (12.0%CA–11.4%CG), and D (6%CA–10.0%CG). A lower percentage of European haplogroups (U, H, K, J, M, T, and HV) were also found (13.1%CA–12.9%CG), likewise African haplogroups (L0, L1, L2, and L3) (6.5%CA–2.1%CG). There were no statistically significant differences between the distribution of mtDNA haplogroups in CA and the CG in this study.
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Schneider, Tammi J. "The Philistines in Transition: A History from ca. 1000-730 B. C. E.. Carl S. Ehrlich." Bulletin of the American Schools of Oriental Research 312 (November 1998): 81–82. http://dx.doi.org/10.2307/1357676.
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Kanzaki, Natsumi, Robin M. Giblin-Davis, Yasmin J. Cardoza, Weimin Ye, Kenneth F. Raffa, and Barbara J. Center. "Bursaphelenchus rufipennis n. sp. (Nematoda: Parasitaphelenchinae) and redescription of Ektaphelenchus obtusus (Nematoda: Ektaphelenchinae), associates from nematangia on the hind wings of Dendroctonus rufipennis (Coleoptera: Scolytidae)." Nematology 10, no. 6 (2008): 925–55. http://dx.doi.org/10.1163/156854108786161517.
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Abstract Two species of aphelench, Bursaphelenchus rufipennis n. sp. and Ektaphelenchus obtusus, were isolated from the 'nematangia', cocoon-like structures found at the base of the hind wings of Dendroctonus rufipennis. The nematangia contained adult females of E. obtusus and the dauer juveniles of B. rufipennis n. sp. Only B. rufipennis n. sp. could be cultured on Monilinia fructicola on LGPDA (lactic acid-treated, glycerol-supplemented, potato dextrose agar). The new species of Bursaphelenchus is described and figured and some additional morphological characters are ascribed to E. obtusus, E. josephi, E. sandiaensis, E. smaelus (= E. prolobos) and E. terebranus after examination of type and/or voucher specimens. Bursaphelenchus rufipennis n. sp. has an adult body length of ca 500-1000 μm, medium a ratios (ca 25-38 for females and ca 30-40 for males), b ratios of ca 8-13 (female) and 7-11 (male), c ratios of ca 15-22 (female and male), c′ ratios of ca 3-4 (female) and ca 2-3 (male), and is characterised by three incisures in the lateral field, mitten-shaped spicules and a conical female tail that curves ventrally and possesses a variable tail tip. The new species is morphologically closest to B. corneolus, B. curvicaudatus, B. gerberae, B. paracorneolus and B. talonus. Morphological examination of type and/or voucher specimens of five Ektaphelenchus species revealed coarse transverse body annulation and three pairs of male caudal papillae (except for the two species where males are not described). Clear typological differences were observed among these five Ektaphelenchus species in the structure of the lip region, presence/absence of stylet knobs and male spicule morphology. Although these characters have not been consistently documented in the past, they may be diagnostic for species in the genus. Molecular phylogenetic analysis based on SSU and D2/D3 LSU sequences revealed that B. rufipennis n. sp. was closest to B. paracorneolus and that E. obtusus was closest to species of Ektaphelenchoides and a Cryptaphelenchus sp.
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Clark, K. A., S. Ikram, and R. P. Evershed. "The significance of petroleum bitumen in ancient Egyptian mummies." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 374, no. 2079 (October 28, 2016): 20160229. http://dx.doi.org/10.1098/rsta.2016.0229.
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Mummification was practised in ancient Egypt for more than 3000 years, emerging from initial observations of buried bodies preserved by natural desiccation. The use of organic balms (and other funerary practices) was a later introduction necessitated by more humid burial environments, especially tombs. The dark colour of many mummies led to the assumption that petroleum bitumen (or natural asphalt) was ubiquitous in mummification; however, this has been questioned for more than 100 years. We test this by investigating 91 materials comprising balms, tissues and textiles from 39 mummies dating from ca 3200 BC to AD 395. Targeted petroleum bitumen biomarker (steranes and hopanes) analyses by gas chromatography-mass spectrometry selected ion monitoring (GC-MS SIM, m/z 217 and 191) showed no detectable bitumen use before the New Kingdom ( ca 1550–1070 BC). However, bitumen was used in 50% of New Kingdom to Late Period mummies, rising to 87% of Ptolemaic/Roman Period mummies. Quantitative determinations using 14 C analyses reveal that even at peak use balms were never more than 45% w/w bitumen. Critically, the dark colour of balms can be simulated by heating/ageing mixtures of fats, resins and beeswax known to be used in balms. The application of black/dark brown balms to bodies was deliberate after the New Kingdom reflecting changing funerary beliefs and shifts in religious ideology. This article is part of the themed issue ‘Quantitative mass spectrometry’.
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Hatano, Naoko, Michio Nakashima, Keizo Horiuchi, Hiromitsu Terao, and Hideta Ishihara. "Crystal Structure, NQR and DSC Studies of Tetrabromocadmates(II): [4-H2NC5H4NH]2CdBr4 · H2O and [2,3,5,6-(CH3)4C4N2H2]CdBr4." Zeitschrift für Naturforschung B 63, no. 10 (October 1, 2008): 1181–86. http://dx.doi.org/10.1515/znb-2008-1007.
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Abstract4-Aminopyridinium tetrabromocadmate(II) monohydrate (1) crystallizes in the orthorhombic space group Pbcm with a = 6.876(2), b = 14.089(2), and c = 18.845(2) Å , Z = 4, T = 296 K. In the crystal structure, a [CdBr4]2− anion, a 4-aminopyridinium cation, and a water molecule are alternately connected into chains by hydrogen bonds N-H···Br and O-H···Br. 2,3,5,6- Tetramethylpyrazinium tetrabromocadmate(II) (2) crystallizes in the orthorhombic space group P212121 with a = 14.640(12), b = 15.615(7), c = 6.686(5) Å , Z = 4, T = 296 K. In the crystal structure, a [CdBr4]2− anion and a 2,3,5,6-tetramethylpyrazinium cation are interconnected by bifurcated hydrogen bonds N-H· · ·2Br and form infinite chains. 81Br NQR spectra with three lines with an intensity ratio of 1 : 1 : 2 (77 K ≤ T ≤ ca. 325 K) and four lines with an intensity ratio of 1 : 1 : 1 : 1 (77 K ≤ T ≤ ca. 330 K) were observed for crystalline 1 and 2, respectively, which are consistent with the crystal structure data. DSC measurements showed the existence of thermal anomalies at high temperatures in both 1 and 2.
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Bawala, T. O., A. A. Taiwo, O. A. Isah, and A. O. Akinsoyinu. "Influence of Mineral Supplementation on the Composition of Goat Milk." Nigerian Journal of Animal Production 36, no. 1 (January 1, 2021): 102–12. http://dx.doi.org/10.51791/njap.v36i1.1081.
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Eighteen monoparousLactating West Afriacan Dwarf (WAD) does, with average weight of 25 土 0.80kg were used in a 12-week feeding trial to examine the effects of dietry mineral supplementation (Dicalcium phosphate and MgSO4 .7H2O) on milk production and composition of Ca. P and Mg The docs were grouped into three of six animal replicate/group and randomly assigned to each of the three isonitrogenous (15% CP) and isoenergetic 9.81MJ/kg ME) Supplementary diets (A, B,, and C) respectively. The supplementary diet contained graded levels (0.5, 1, and 1.5% of Dicalcium phosphate and MgSO4.7H20 and fed with a basal diet of cyndom nlemfeuns grass in a completely randomized design. Results showed that treatment effects on dry matter intake (DMI (g/dry/kgB )circulating levels (mg/100ml) of ca, P and Mg in milk and sera of WAD does were significant (P <0.05), Variations observed on milk wal said were not significant (P >0.05. Significant (p<0,05) dry matter intake (DMI) (g/day/kgBW) values of 155.55, 174.77 and 193.34 were obtained for does on diets A, B and C respectively; While corresponding significant (P < 0.01) mean milk value of 185.30, 301.20, and 340.05 g/day were obtained significantly different (P<0.05) wear values of Ca, P and Mg levels obtained milk of WAD does on diets A, B and C were: Ca. 121.0, 127.0 and 132.0; P. 84.5, 89.78 and 94.08; and Mg: 18.90, 41.87 and 47.61(mg/100ml); while corresponding values in serumn were Ca: 9.75, 10.0 and 10.13. P: 7.15, 7.57 7.79; and Mg: 3.20, 3.52 and' 4.54 (mg/100ml)respectively.Significant (P < 0.05) positive correlations (r- 0.99, 0.97 and 0.73) existed between and serum Ca, P and Mg contents respectively, suggested that blood is a Secondary source of milk mineral secretion in lactating animals. The general trend was that increasing dietary mineral supplementation resulted in concomitant Increase in dr matter consumption, milk yield and milk mineral (Cu, P. and Mg) contents with does and diet C recording In the best performance. Consequently, dietary Ca. P and Mg levels %DM) in supplementary lactation diet for indigenous WAD goats seemed to be best at 0.43, 0.35, and 0.17 respectively
Book chapters on the topic "Ca 1550-ca 1070 B C"
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White, Robert E. "How the Soil Supplies Nutrients." In Soils for Fine Wines. Oxford University Press, 2003. http://dx.doi.org/10.1093/oso/9780195141023.003.0006.
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Most plants need 16 elements to grow normally and reproduce. Some of these elements are required in relatively large concentrations, ideally >1,000 mg/kg (0.1%) in the dry matter (DM); these are called macronutrients. The others, called micronutrients, generally are required in concentrations <100 mg/kg DM (0.01%). Of the essential elements, C and O are supplied as CO2 from the atmosphere, whereas H and O are supplied in H2O from the atmosphere and water sources. Chlorine is also abundant in the air and oceans as the Cl_ ion. Winds whip sea spray containing Cl, Na, Mg, Ca, and S into aerosols to be deposited by rain on the land or as “dry deposition” on vegetation. Nitrogen as N2 gas in the atmosphere enters soil–plant systems primarily by “biological fixation” (section 4.2.2.1), although small amounts are also deposited as NH4+ and NO3_ ions from the air. Cobalt (Co) is essential for biological N2 fixation in legumes and blue-green algae. For the remaining essential elements, the major source is minerals that weather in the soil and parent material. Another term frequently used is trace element, which can include both essential and nonessential elements. A trace element normally occurs at a concentration <1,000 mg/kg in the soil. There are three categories of trace elements: 1. The essential micronutrients Cu, Zn, Mn, B, and Mo, which are beneficial at normal concentrations in the plant (ranging from 0.1 mg/kg for Mo to 100 mg/kg for Mn) but which become toxic at higher concentrations. Iron is the only micronutrient that is not strictly a trace element. 2. Elements such as chromium (Cr), selenium (Se), iodine (I), and Co that are not essential for plants, but are essential for animals. 3. Elements such as arsenic (As), mercury (Hg), cadium (Cd), lead (Pb), and nickel (Ni), which are not required by plants or animals and are toxic to either group at concentrations in the organism greater than a few mg/kg. Trace elements in the soil are normally derived from the parent material. Examples of concentrations of trace elements in soils derived from different parent materials are given in table 4.2.
Conference papers on the topic "Ca 1550-ca 1070 B C"
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Chopra, Seema. "Sclerosing sex cord stromal tumour of the ovary: A rare variant of ovarian neoplasms in childhood and adolescence." In 16th Annual International Conference RGCON. Thieme Medical and Scientific Publishers Private Ltd., 2016. http://dx.doi.org/10.1055/s-0039-1685321.
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Case Report: 19 yr old unmarried girl c/o abdominal distension, loss of appetite and Irregular menstrual cycles x 5 months. USG: gross ascites, liver, Lobulated isoechoic mass in right adnexa, 7x5 cm, abutting right ovary. CA125: 1297 U/ml. FNAC Degenerated crushed cells & stromal fragments. Few scattered benign oval/spindle cells. Laparoscopy f/b laparotomy: 6 litres of straw colored asciic fluid drained. Uterus, left adnexa normal. Rt ovarian mass 6x7 cm, bilobed, arising from ovary. Solid, stuck in POD Adherent to gut. Right oophrectomy done. CA-125: 22 u/ml on day 6 post op. HPE – Sclerosing stromal tumor. Discussion: Sclerosing sex cord stromal tumour of the ovary is a rare tumor; accounts for 6% of ovarian stromal tumors Over a 100 reported tumors in literature. 80% of SST seen in second and third decade of life. Essentially a benign tumour, Usually a unilateral nonfunctioning tumor. Few cases with elevated serum CA-125 and hormonal abnormalities have been reported. Endocrine alterations caused by secretion of estrogen, progesterone or testosterone; induction of precocious puberty. Conclusion: Unilateral oophrectomy is the treatment. No recurrence of the tumor in the patients treated by oophorectomy or by conservative resection of the tumor. Excision of the tumor isfollowed by normal menses, pregnancy has also been reported.
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Tsuchi, H., K. Ishiguro, A. Deguchi, Y. Takahashi, and K. Kaku. "Overview of NUMO’s Policy for Implementing Safe Geological Disposal and Developing Supporting Technologies." In ASME 2010 13th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2010. http://dx.doi.org/10.1115/icem2010-40097.
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Based on the Act on Final Disposal of Specified Radioactive Waste, the Nuclear Waste Management Organization of Japan (NUMO) was established in October 2000 as the implementing organization for geological disposal of the radioactive waste. Since its establishment NUMO has been developing the technologies required for implementation of the project and initiated the solicitation of the disposal site by volunteering from the municipalities. However, no effective application has been received as yet to initiate the site investigation. Thus NUMO decided to prepare the NUMO 2010 Technical Report as a tool for improving the general understanding of the geological disposal project. The report will present the safety policy that describes how NUMO aims to achieve safe geological disposal through the ca.100-year-long project and will document the progress made with developing the technologies that support the safety concept. Three policies for ensuring safety are described namely a) staged and flexible project implementation and decision making based on iterative confirmation of safety, b) project implementation based on reliable technologies and c) technical activities for building confidence in NUMO’s safety concept. The report also summarizes the technological development for implementation of the geological disposal project in Japan.