Concentration and distribution of oxygen-containing compounds in crude oils from the southeastern part of Western Siberia

The concentration and distribution of oxygen-containing compounds in crude oils from Jurassic deposits of the southeastern part of Western Siberia have been investigated. Close correlations between compounds containing oxygen, nitrogen, and sulfur atoms have been demonstrated. It has been concluded that petroleum oxygen was inherited from the primary biomass and its content is determined mainly by the type and the burial environment of this biomass, which forms the sediment organic matter transforming subsequently into oil.     

上罗拉皮圈对环锭纺的影响

上罗拉皮圈是复杂的纺线生产流程中一个很小的细节。然而,由于它们对成纱质量有较大影响,必须对它们进行优先考虑。质量不是一个简单的问题,它包括多个方面（橡胶质量、正确的加工、定期的保养）。因此,皮圈的选择就像保养操作的自动化程度一样影响成本产生。本文将就这个问题进行讨论。     

Local triboelectrification of an n-GaAs surface using the tip of an atomic-force microscope

The method of scanning Kelvin-probe microscopy is used to show that the effect of triboelectrification is observed when the tip of an atomic-force microscope interacts with the surface of n-GaAs epitaxial layers. The sign of the change in the potential indicates that the sample surface after triboelectrification becomes more negative. The observed specific features of the phenomena can be attributed to the thermally activated generation of point defects in the vicinity of the sample surface due to deformation caused by the tip.     

Dynamics of parameters of an erosion torch formed under the action of submicrosecond laser radiation on a zinc target

By the laser probing method the time dependence of the transmission factor of an erosion laser torch of zinc under the action on a metal target of intensive submicrosecond pulses has been determined. On the basis of the results of laser probing, a conclusion on the formation mechanism of the liquid-drop phase of the target material under the given irradiation conditions has been drawn.     

Brønsted acidity study of fiberglass materials by H/D-exchange

The kinetics of hydrogen isotopic exchange over fiberglass materials and reference samples (SiO₂, H₃PO₄/SiO₂, and HZSM-5) was studied at 500 °C under the dynamic adsorption–desorption equilibrium. The concentrations and H/D-exchange rates of different Brønsted acid sites (BAS) were determined using the numerical modeling of isotope exchange dynamics. The correlation between H/D-exchange rate of reference samples and their acidity determined by FTIR spectroscopy of adsorbed CO was established. Based on this correlation, the strength of BAS in fiberglass materials was shown to be comparable to that of HZSM-5 zeolite.     

Anterior rhinomanometry in nasal allergen challenges

Even simple and relatively safe provocation procedures like nasal allergen challenges, should aim to allow detection of positivity with the less possible discomfort to the patient. The objective of this work was to evaluate if the use of rhinomanometric measurements during nasal provocation procedures could allow a decrease in the total administered allergen dose, causing less symptoms to the patients but without increasing the number of false-negatives, comparatively to clinical scores or nasal peak-flow measurements. Our results showed that performing rhinomanometric measurements during nasal HDM challenge procedures can lead in many patients to a reduction in the total dose of allergen administered during the challenge, without loss of sensitivity or specificity. This allergen dose reduction translates in less time consumed during the provocation and less patients' discomfort.     

Effect of ambulatory utilization review on referrals from generalists to specialists

We studied whether ambulatory utilization review (UR) alters how many patients internal medicine residents refer to sub-specialists, and whether the effect persists without reinforcement. We compared referral rates of residents from a firm that held UR meetings (intervention firm residents, n = 20) with those of residents from a firm that did not (control firm residents, n = 21). We then compared referral rates of 17 intervention firm residents while they were participating in UR with their rates after not participating for at least 4 weeks. Intervention firm residents submitted 30% fewer referrals than control firm residents (9% vs 13%, p = .05). However, the effect was short-lived; after 4 weeks without UR, intervention firm resident referral rates were similar to control firm referral rates.     

Development of foundations of small-section piles and their introduction to construction

Conclusions 1. The use of small-section piles for the foundations of lightweight buildings and structures significantly reduces material consumption and labor outlays for their construction.2. The technology and embedment equipment, as well as designs of small piles and pile foundations from these designs, which have been developed as a result of experimental construction, will make it possible to introduce these piles on a broader scale in construction practice.3. The basic positions of Construction Norm and Regulation II-17-77 with the refinements proposed in this paper can be used to compute the bearing capacity of small-section piles subject to vertical and horizontal loads and for dynamic tests.Deceased.Scientific-Research Institute of Industrial Buildings and Structures. Translated from Osnovaniya, Fundamenty i Mekhanika Gruntov, No. 1, pp. 6–8, January–February, 1981.     

Effects of citidine diphosphocholine (citicholine) and phospholipids on the elastic properties of the lung and on the physico-chemical properties of the irrigation liquid]

The chemical composition of yeast cells of Oidiodendron kalrai was analyzed and is expressed as percent dry weight. Cultures were grown in tryptone broth and in a liquid synthetic medium containing ammonium salts as a nitrogen source. After 48 h, carbohydrate levels were higher in the synthetic medium, but lipid levels were lower, Deoxyribonucleic acid (DNA), ribonucleic acid (RNA), and protein contents did not differ significantly in the two media. The chemical components were also studied at different stages of growth. DNA remained relatively constant, but other components varied with the age of culture. The RNA was 6.6% at 18 h and declined rapidly to 5% by 24 h and remained constant, An initial protein content of 23% at 18 h increased rapidly to 37% by 48 h and gradually declined to 30% by day 10. The lipid content of 33% at 18 h decreased over the entire growth period to 10% by day 10. An initial carbohydrate level of 30% increased to a maximum of 54% by day 5 and then declined.