نتایج جستجو برای: 522 bc
تعداد نتایج: 19378 فیلتر نتایج به سال:
Previous studies have shown that after being trained on A-B and A-C match-to-sample tasks, adults match not only same-class Band C stimuli (equivalence) but also BC compounds with sameclass elements and with different-class elements (BC-BC) . The assumption was that the BC-BC performances are based on matching equivalence and nonequivalence relations (equivalenceequivalence) . The present study...
N. Fichtner, E. L. MacMillan, B. Mädler, A. Curt, D. K. Li, M. F. Dvorak, and A. L. MacKay Dept. of Physics & Astronomy, University of British Columbia, Vancouver, BC, Canada, Dept. of Clinical Research, University of Bern, Bern, Switzerland, Philips Healthcare, Vancouver, BC, Canada, Dept. of Neurology, University of British Columbia, Vancouver, BC, Canada, International Collaboration on Repai...
فرم آلدئید یکی از ترکیبات آلی فرّار سمٌی است که بایستی از هوای آلوده حذف شود.یکی از فن آوری های موجود برای حذف فرم آلدئید, تجزیه فتوکاتا لیستی است. تجزیه فتوکاتا لیستی یک فن آوری پیشرفته ونوین جهت تصفیه هوای آلوده محسوب می گردد. هدف از این مطالعه تعیین تأ ثیر ترکیب نانوذرات اکسید روی(zno) با خاکستر استخوان(bc) بر حذف فتو کاتا لیستی گاز فرم آلدئید بود. دراین مطالعه تجربی، خاکسترهای استخوان سیاه و...
در پژوهش حاضر تأثیر مسیرهای کرنش در فرایند نورد تجمعی پیوندی بر خواص مکانیکی و ریزساختار نوارهای مسی مورد بررسی قرار گرفت. بدین منظور از نورد تجمعی پیوندی مستقیم (مسیر a) و همچنین نورد تجمعی پیوندی با زاویه¬های چرخش 90 درجه در جهت پاد¬ساعتگرد (مسیر bc)، 90± درجه (مسیر ba) و 180 درجه (مسیر c) استفاده شد. جهت انجام این پژوهش از نوارهای مسی خالص تجاری با ضخامت 1 میلی متر و در ابعاد 5 × 15 سانتی مت...
Protein Tyrosin Kinase 7 (PTK7) is upregulated in several human cancers; however, its clinical implication in breast cancer (BC) and lymph node (LN) is still unclear. In order to investigate the function of PTK7 in mediating BC cell motility and invasivity, PTK7 expression in BC cell lines was determined. PTK7 signaling in highly invasive breast cancer cells was inhibited by a dominant-negative...
The two heavy quarks in a baryon which contains two heavy quarks and a light one, can constitute a scalar or axial vector diquark. We study electromagnetic radiations of such baryons, (i) Ξ(bc)1 → Ξ(bc)0 + γ, (ii) Ξ∗(bc)1 → Ξ(bc)0 + γ, (iii) Ξ ∗∗ (bc)0 (1/2, l = 1) → Ξ(bc)0 + γ, (iv) Ξ∗∗ (bc)0(3/2, l = 1) → Ξ(bc)0 + γ and (v) Ξ ∗∗ (bc)0 (3/2, l = 2) → Ξ(bc)0 + γ, where Ξ(bc)0(1) ,Ξ ∗ (bc)1 are ...
The black carbon (BC) burden of the upper troposphere and lowermost stratosphere (UTLS) is investigated with the general circulation model (GCM) ECHAM4. The special focus is the contribution of aircraft emissions to the UTLS BC loading. Previous studies on the role of aircraft emissions in the global BC cycle either neglect BC sources located at the Earth’s surface or simplify the BC cycle by a...
We investigated the associations between single nucleotide polymorphisms (SNPs) in the testis-specific Y-encoded-like protein 6 (TSPYL6) gene and breast cancer (BC) susceptibility in the Han Chinese population. A total of 183 BC patients and 195 healthy women were included in the study. Six SNPs in TSPYL6 were genotyped and the association with BC risk analyzed. Odds ratios (ORs) and 95% confid...
Increasing wildfire activity in the Alaskan Arctic may result in new sources of black carbon (BC) to arctic watersheds. Black carbon, primarily comprised of condensed aromatics, is one of the most chemically recalcitrant fractions of organic carbon. However, lateral transfer of particulate and dissolved BC from soils to sunlit surface waters is increasingly suggested to result in the photochemi...
this article presents the application of two algorithms: heuristic big bang-big crunch (hbb-bc) and a heuristic particle swarm ant colony optimization (hpsaco) to discrete optimization of reinforced concrete planar frames subject to combinations of gravity and lateral loads based on aci 318-08 code. the objective function is the total cost of the frame which includes the cost of concrete, formw...
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