Novel technological possibilities for growth of GaAs autoepitaxial films, and properties of Gunn diodes made on their basis

The n⁺-n-n⁺-n⁺⁺-GaAs epitaxial structures were MBE-grown on porous nanostructured and traditional (standard) heavily doped n⁺⁺-GaAs substrates. On their basis, we fabricated the Gunn diodes generating power output in the 44−59 GHz (first harmonic) and 101−104 GHz (second harmonic) frequency ranges. For both harmonics, the power output of the Gunn diodes grown on porous substrates was shown to be from 20 to 30 % higher than those grown on the flat ones

Distribution and number of marine mammals in the open Barents Sea and their connection with capelin and polar cod distribution [presentation]

This paper presents the data on the character of distribution and the assessment of the number of marine mammals in the open part of the Barents Sea in autumn 2001-2004 by the results from PINRO’s aerial surveys using the airborne laboratory AN-26 “Arktika” and the annual joint Russian-Norwegian vessel ecosystem survey for pelagic fish including capelin and polar cod. The aerial surveys were carried out being combined with the vessel surveys and their tacks coincided or crossed in several points

Polymorphism of angiotensin-I-converting enzyme in patients with essential hypertension, left ventricular hypertrophy and myocardial infarction at young age: A preliminary report

Insertion/deletion (I/D) polymorphism of angiotensin-I-converting enzyme (ACE) gene was studied by use of the polymerase chain reaction in 168 normal subjects living in Moscow region and in 70 patients: 38 with essential hypertension (EH), 9 of which survived myocardial infarction at young age, 13 with hypertrophic cardiomyopathy (HCMP) and 19 with myocardial infarction (MI). Left ventricular hypertrophy (LVH) was detected in 24 of 38 EH patients. There was a highly significant increase in the frequency of the ID genotype in EH patients compared to the controls (62.4% versus 32.7%, P < 0.01). There was a relevant decrease in the frequency of the DD genotype in EH patients in comparison with the control (20.8% versus 47.6%, P < 0.05). These results strongly suggest that the ACE gene is associated with EH. No significant differences in both allele and genotype frequencies of the ACE gene were revealed in two groups of patients with MI and with HCMP compared to the controls. Thus, no relations between the ACE gene and these disorders were observed. In hypertensives with MI the II genotype was not detected and the frequency of both D allele and DD genotype was sufficiently increased compared to normotensive patients with MI. Thus, the DD genotype in hypertensives may be a risk factor for MI. The frequency of the DD genotype was significantly increased in hypertensive patients with LVH compared to the uncomplicated hypertension (37.5% versus 7.1%, P < 0.05). Therefore, this genotype is associated with LVH in hypertensive subjects

Polymorphism of angiotensin-I-converting enzyme in patients with essential hypertension, left ventricular hypertrophy and myocardial infarction at young age: A preliminary report

Insertion/deletion (I/D) polymorphism of angiotensin-I-converting enzyme (ACE) gene was studied by use of the polymerase chain reaction in 168 normal subjects living in Moscow region and in 70 patients: 38 with essential hypertension (EH), 9 of which survived myocardial infarction at young age, 13 with hypertrophic cardiomyopathy (HCMP) and 19 with myocardial infarction (MI). Left ventricular hypertrophy (LVH) was detected in 24 of 38 EH patients. There was a highly significant increase in the frequency of the ID genotype in EH patients compared to the controls (62.4% versus 32.7%, P < 0.01). There was a relevant decrease in the frequency of the DD genotype in EH patients in comparison with the control (20.8% versus 47.6%, P < 0.05). These results strongly suggest that the ACE gene is associated with EH. No significant differences in both allele and genotype frequencies of the ACE gene were revealed in two groups of patients with MI and with HCMP compared to the controls. Thus, no relations between the ACE gene and these disorders were observed. In hypertensives with MI the II genotype was not detected and the frequency of both D allele and DD genotype was sufficiently increased compared to normotensive patients with MI. Thus, the DD genotype in hypertensives may be a risk factor for MI. The frequency of the DD genotype was significantly increased in hypertensive patients with LVH compared to the uncomplicated hypertension (37.5% versus 7.1%, P < 0.05). Therefore, this genotype is associated with LVH in hypertensive subjects

Ground of indexes for the estimation readiness and possibilities of rear in relation to implementation of the rearward providing tasks of battle actions of tactical aviation aviation brigades

Обґрунтовано вибір показників для оцінки готовності та можливостей тилу щодо виконання завдань тилового забезпечення бойових дій авіаційних бригад тактичної авіації.Обоснован выбор показателей для оценки готовности и возможностей тыла по выполнению заданий тылового обеспечения боевых действий авиационных бригад тактической авиации.The choice of indexes is grounded for the estimation of readiness and possibilities of rear on implementation of tasks of the rearward providing of battle actions of aviation brigades of tactical aviation

Determination of preferential molecular orientation in porphyrin-fullerene dyad ZnDHD6ee monolayers by the X-ray standing-wave method and X-ray reflectometry

Monolayers of porphyrin-fullerene dyad molecules with zinc atoms incorporated into the porphyrin ring (ZnDHD6ee) on the surface of aqueous subphase and on Si substrates have been investigated by the X-ray standing-wave method and X-ray reflectometry. The experiments have been performed under laboratory conditions and on synchrotron radiation sources (KMC-2 station of BESSY II (Berlin) and Langmuir station at the National Research Centre &quot;Kurchatov Institute&quot;). Depth distributions of Zn atoms and electron density in the monolayer film are calculated. On the basis of the analysis of these distributions, it is concluded that ZnDHD6ee dyad molecules in monolayers have preferential orientation. The data obtained indicate that the molecules in monolayer film retain their orientation when the monolayer is transferred from a liquid subphase surface onto a solid substrate

Substantive provisions of estimation readiness method and possibilities of rear in relation to implementation of the rearward providing tasks of battle actions of tactical aviation aviation brigades

Розкриті основні положення методики оцінки готовності та можливостей тилу щодо виконання завдань тилового забезпечення бойових дій авіаційних бригад тактичної авіації.Раскрыты основные положения методики оценки готовности и возможностей тыла относительно выполнения заданий тылового обеспечения боевых действий авиационных бригад тактической авиации.The substantive provisions of method of estimation of readiness and possibilities of rear are exposed in relation to implementation of tasks of the rearward providing of battle actions of aviation brigades of tactical aviation