The New Aesthetics and Traditions of the Russian Stone and Jewellery Art in the Collections of Yekaterinburg Jewellery Houses

This article presents a review of the leading jewellery companies in Yekaterinburg. We present a comparative analysis of the range of products, focussing on the new stylistic design techniques and technological features of the jewellery collections and stone-cutting works produced by the leading jewellery houses. Examples of the most significant works in the premium class segment are discussed. We demonstrate how modern Russian jewellery art creatively combines and develops Russian and European historical jewellery tradition while striving to absorb and utilize cutting-edge techniques, materials and technologies. The wide range of resulting artworks and approaches to modern jewellery-making highlights the successful combination of historical and modern approaches. More sophisticated technology allows the jewellery artists to implement new ideas while creating increasingly technically complex works. We analyse the works by the leading Yekaterinburg jewellery houses: MOISEIKIN, CHAMOVSKIKH, Natasha Libelle, Ringo, Maxim Demidov, Jewellers of Ural. Keywords: jewellery collection, design, translation method, quatation method, transformatio

FLUX FOR PROTECTIVE COATING OF BRASS MELT

FIELD: metallurgy. SUBSTANCE: invention relates to metallurgy field and can be used at protection of brass melt in ingot-forming equipment of continuous caster. Flux contains frit of fluoric silicate enamel 20-25% and sodium oktaborate is the rest. EFFECT: defect elimination, appeared during continuous casting of complex alloyed brass. 1 tbl, 3 dwg, 4 ex.Изобретение относится к области металлургии и может быть использовано при защите расплава латуни в кристаллизаторе машины непрерывного литья. Флюс содержит фритту фтористой силикатной эмали 20-25% и октаборат натрия остальное. Технический результат заключается в устранении дефектов, возникающих при непрерывном литье сложнолегированных латуней. 1 табл., 3 ил

Increased Serum Parathyroid Hormone, Osteocalcin and Alkaline Phosphatase Are Associated with a Long-Term Adverse Cardiovascular Outcome after Coronary Artery Bypass Graft Surgery

Despite the fact that an association of osteopoenia/osteoporosis with elevated risk of coronary artery calcification (CAC) and coronary atherosclerosis (CA) is well-established, it remains unclear whether bone turnover markers can be employed in long-term prognostication of such patients. Here we measured serum calcium, phosphate, calcitonin, parathyroid hormone (PTH), osteoprotegerin, osteocalcin, osteopontin, alkaline phosphatase and its bone isoenzyme, subsequently correlating them with an adverse cardiovascular outcome after 3 years of follow-up. The extent of brachiocephalic artery stenosis, CA, or CAC, as well as prevalence of osteopoenia/osteoporosis before the coronary artery bypass graft (CABG) surgery, did not differ between outcome groups, suggesting that subtle molecular mechanisms might be involved in determining the outcome rather than clinical or subclinical disease. After stepwise logistic regression, serum osteocalcin > 26.8 ng/mL and PTH > 49.1 pg/mL were independent predictors of an adverse outcome. Serum ionised calcium correlated with multivessel coronary artery disease; moreover, patients with severe CA (SYNTAX score > 21) had higher serum ionised calcium than those with mild CA. Likewise, serum alkaline phosphatase was associated with severe CA and CAC (Agatston score > 400). In conclusion, serum PTH, osteocalcin, and alkaline phosphatase are associated with an adverse cardiovascular outcome 3 years after CABG surgery regardless of osteopoenia/osteoporosis, coronary/peripheral atherosclerosis, and CAC

Photocatalytic Hydrogen Generation from Aqueous Methanol Solution over n-Butylamine-Intercalated Layered Titanate H2La2Ti3O10: Activity and Stability of the Hybrid Photocatalyst

The stability of platinized n-butylamine-intercalated layered titanate H2La2Ti3O10 during the process of photocatalytic hydrogen production from aqueous methanol under UV irradiation has been thoroughly investigated by means of XRD, CHN, TG, 13C NMR, BET, SEM and GC-MS analysis. It was revealed that n-butylamine completely abandons the interlayer space and transforms into n-butyraldehyde within 3 h of the reaction, while the particle morphology and specific surface area of the photocatalyst are preserved. The resulting solid phase contains carbon in at least two different oxidation states, which are attributed to the intermediate products of methanol oxidation bound to the perovskite matrix. The activity of the photocatalyst formed in this way is stable in time and strongly depends on the medium pH, which is not typical of either the parent H2La2Ti3O10 or TiO2. An approximate linear equation φ ≈ 29−2∙pH holds for the apparent quantum efficiency of hydrogen production in the 220–340 nm range at 1 mol. % methanol concentration. In the acidic medium, the photocatalyst under study outperforms the platinized H2La2Ti3O10 by more than one order of magnitude. The variation in methanol concentration allowed a maximum quantum efficiency of hydrogen production of 44% at 10 mol. % to be reached

Photocatalytic Hydrogen Generation from Aqueous Methanol Solution over <i>n</i>-Butylamine-Intercalated Layered Titanate H₂La₂Ti₃O₁₀: Activity and Stability of the Hybrid Photocatalyst

The stability of platinized n-butylamine-intercalated layered titanate H2La2Ti3O10 during the process of photocatalytic hydrogen production from aqueous methanol under UV irradiation has been thoroughly investigated by means of XRD, CHN, TG, 13C NMR, BET, SEM and GC-MS analysis. It was revealed that n-butylamine completely abandons the interlayer space and transforms into n-butyraldehyde within 3 h of the reaction, while the particle morphology and specific surface area of the photocatalyst are preserved. The resulting solid phase contains carbon in at least two different oxidation states, which are attributed to the intermediate products of methanol oxidation bound to the perovskite matrix. The activity of the photocatalyst formed in this way is stable in time and strongly depends on the medium pH, which is not typical of either the parent H2La2Ti3O10 or TiO2. An approximate linear equation φ ≈ 29−2∙pH holds for the apparent quantum efficiency of hydrogen production in the 220–340 nm range at 1 mol. % methanol concentration. In the acidic medium, the photocatalyst under study outperforms the platinized H2La2Ti3O10 by more than one order of magnitude. The variation in methanol concentration allowed a maximum quantum efficiency of hydrogen production of 44% at 10 mol. % to be reached