Prodor slanih maziva u područje kontakta cijevi i trna u stanovima kontinuirane valjaonice cijevi

The mechnism of the salt phosphate lubricant ingress in zone of the tube deformation on a long cylindric mandrel was considered. Suggested mathematical model is based on the points of the hydrodynamic theory of lubrication. Data presented are concerned with a value of a salt lubricant layer thickness and friction factor between metal and mandrel at continuous hot rolling of tubes.Razmatran je mehanizam prodiranja soli fosfatnog maziva u zonu deformiranja cijevi valjanih na dugom cilindričnom trnu. Prijedlog matematičkog modela se osniva na hidrodinamičkoj teoriji podmazivanja. Podaci su prikazani vezano za vrijednosti debljine sloja podmazivanja i koeficijenta trenja između metala i trna pri toplom kontinuiranom valjanju cijevi

The Heat Conditions of the Cold Pilger Rolling

The influence of technological factors and constructive parameters of the cold pilger rolling mill to the warm conditions of deformation is observed. The dependences of the heat conditions of pilger rolling on deformation mode and preheating temperature are shown. There was a conclusion drawn about the expediency of combination of warming and cooling of the metal for keeping the deformation zone temperature within limit, which corresponds to the minimal intensity of the metal strengthening

Thermally stable composite system Al2O3-Ce 0.75Zr0.25O2 for automotive three-way catalysts

Present-day three-way catalysts operate in contact with exhaust gases whose temperature is as high as >1000 C, so the problem of developing thermally stable catalytic compositions is still topical. A series of Al2O 3-Ce0.75Zr0.25O2 composites containing 0, 10, 25, and 50 wt % Al2O3 has been synthesized by direct precipitation. The as-prepared composites and those calcined in air at 1000 and 1100 C have been characterized by BET, X-ray diffraction, transmission electron microscopy, and temperature-programmed reduction methods. The composites aged at 1050 C in a 2% O2 + 10% H2O + 88% N2 atmosphere have been used to prepare monolith catalysts, and the oxygen storage capacity (OSC) of the latter has been measured using a gas analysis setup. As the proportion of Al2O 3 in the composite is raised, the mixing uniformity and degree of dispersion of Ce x Zr1-x O2-δ particles increase, their chemical composition becomes homogeneous, and the amount of cerium involved in oxidation and reduction increases. The composite containing 50 wt % Al2O3 is a mixture of Ce x Zr 1-x O2-δ and Al2O3 crystallites, whose size is practically unaffected by calcination. The (Pt/Al2O3 + Al2O3-Ce 0.75Zr0.25O2) based on this composite has the highest OSC and is the most active. For this reason, full-scale testing of this catalyst is recommended. © 2013 Pleiades Publishing, Ltd

Dissolved organic matter and microbial carbon of Protocalcic Chernozems of different land management

Water-extractable organic matter is the most active and mobile form of soil carbon. The other active fraction and extremely biolabile is the carbon constituent of microorganisms. Both of these fractions play an essential role in agrocenoses and in the global carbon cycle on our planet. The aim of the work was to estimate the carbon content of water-extractable organic matter as well as that of microbial origin in typical chernozems (Protocalcic Chernozems) of different land-use types. Protocalcic Chernozem samples taken from the fields of long-term experiments with different types of land use were investigated: a permanent bare fallow for 55 years (since 1964); conventional tillage – four-field crop rotation, first rotation; direct seeding – crop rotation similar to direct seeding, first rotation; a 21-year fallow (since 1998) after 34 years of bare fallow (since 1964). We determined the carbon content of water-extractable organic matter and the carbon content of microbial origin. In the studied series of variants, the proportion of carbon of water-extractable organic matter in the total amount of organic matter in the upper horizon (0–15 cm) was 0.69, 0.85, 1.01, and 0.98%, respectively, while that of carbon of microbial origin was 0.27, 0.55, 0.53, and 1.52%. It was noted that against the background of increasing the content of total organic carbon in direct seeding variant, compared with the traditional soil treatment, the microbial biomass in this variant does not increase. The fallow variant, unlike all other types of land use, is characterized by a higher proportion of microbial carbon, in contrast to the carbon of water-extractable organic matter

C-fos expression and cell proliferation in mice after exposure to nanosecond repetitively-pulsed X-rays

В статье указано Rostov, Vladimir V

Determining biological value and quality indicators of beverages of the drink-breakfast type

Розробленi рецептури та технологiї виробництва напоїв типу «drink-breakfast» з пiдвищеним вмiстом бiлка та вираженими антиоксидантними властивостями. Компонентами композицiй напоїв стали: сир кисломолочний, молоко коровьяче знежирене, насiння канюти, ядра волоських горiхiв, мед, шпинат, банан, псилiум, гiдролiзат коллагена (глютин). Напої є джерелами легкозасвоюваного бiлка, вiтамiнiв-антиоксидантiв (С, РР, Е) i харчових волокон. За рахунок введення в композицiю глютина, одна порцiя розроблених напоїв «Шпинатний» i «Банановый» задовольняє потребу в бiлках на 7,6 % i 7,2 % вiдповiдно. Введення в склад напоїв шпинату i банану сприяє їх збагаченню фолатами. Аналiз мiнерального складу розроблених напоїв дає можливiсть стверджувати, що напої є джерелами основних макро- та мiкронутриентов i на високому рiвнi задовольняють потреби в них. Використання як активних iнгредiєнтiв псилiуму та глютину пiдвищує антиоксидантну активнiсть у 50–60 разiв, що пояснюється синергiзмом всiх компонентiв. Визначено технологiчнi умови гiдратацiї псилiуму. Встановлено, що середнiй розмiр сухих частинок псилiуму складає 1,79 мм, а гiдратованого 2,28 мм (5 хв., 20 °С). На поверхнi часточок утворюється шар слизи – розчинних харчових волокон, що сприяє стабiлiзацiї харчової системи. Використання глютину в якостi пiноутворювача в напоях забезпечує утворення стабiльної аерованої структури. Розмiри комiрок пiни в напої «Шпинатний» коливається в дiапазонi 0,05–0,15 мм, а в напої «Банановий» вiд 0,001 до 0,15 мм. Моделювання умов зберiгання за допомогою ALST тесту за оцiнкою змiни мiкробiологiчних та органолептичних показникiв дає можливiсть стверджувати, що напої будуть конкурентоспроможними на споживчому ринку України. При зберiганнi протягом 36 годин при температурi (4 ± 2) °С влажнiстю не бiльше 75 % в герметичнiй тарi вмiст санiтарно-показових мiкроорганiзмiв вiдповiдає санiтарно-гiгiєнiчним вимогам до напоїв на молочнiй основi. Розробленi напої «drink-breakfast» можуть бути рекомендованi для дитячого харчування, а також у харчування вагiтних жiнок i жiнок, що знаходяться в перiодi лактацiї

NOVOSIBIRSK REGION PROGRAM OF THE LIVER TRANSPLANTATION IN CHILDREN

The aim of the study was to analyze the early and late outcomes of pediatric liver transplantation (LTx) program in the Novosibirsk region. Material and Methods. The retrospective study included 24 patients aged 72 ± 74.8 months (from 4 to 212 months, median – 20 months) with a body weight of 21.7 ± 18.1 kg (from 4.5 to 55 kg, median – 12.5 kg). Two (8.3 %) cadaveric whole liver grafts, 19 (79.2 %) living donor liver grafts, and 3 (12.5 %) cadaveric liver fragments (reduced-size or split-liver) were transplanted. Results. The features of vascular and biliary reconstruction in different types of LTx are discussed. The incidence of vascular and biliary complications was 8.3 and 20.8%, respectively. The patients stayed in the intensive care unit for 9 ± 5.1 days (from 4 to 22 days, median 8 days) and total length of hospital stay was for 40 ± 25.4 days (from 19 to 136 days, median 32 days). Two (8.3 %) recipients had early graft dysfunction. Perioperative mortality (up to 90 days) was absent. The overall 5-year patient and graft survival rates were 95 and 88 %, respectively. Conclusion. The Novosibirsk region has a pediatric LTx program with outcomes comparable to the data of the leading world and Russian centers

A Genome-Wide Association Study Identified AFF1 as a Susceptibility Locus for Systemic Lupus Eyrthematosus in Japanese

Systemic lupus erythematosus (SLE) is an autoimmune disease that causes multiple organ damage. Although recent genome-wide association studies (GWAS) have contributed to discovery of SLE susceptibility genes, few studies has been performed in Asian populations. Here, we report a GWAS for SLE examining 891 SLE cases and 3,384 controls and multi-stage replication studies examining 1,387 SLE cases and 28,564 controls in Japanese subjects. Considering that expression quantitative trait loci (eQTLs) have been implicated in genetic risks for autoimmune diseases, we integrated an eQTL study into the results of the GWAS. We observed enrichments of cis-eQTL positive loci among the known SLE susceptibility loci (30.8%) compared to the genome-wide SNPs (6.9%). In addition, we identified a novel association of a variant in the AF4/FMR2 family, member 1 (AFF1) gene at 4q21 with SLE susceptibility (rs340630; P = 8.3×10−9, odds ratio = 1.21). The risk A allele of rs340630 demonstrated a cis-eQTL effect on the AFF1 transcript with enhanced expression levels (P<0.05). As AFF1 transcripts were prominently expressed in CD4+ and CD19+ peripheral blood lymphocytes, up-regulation of AFF1 may cause the abnormality in these lymphocytes, leading to disease onset