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  1. Book ; Online: Balkan Cyberia

    Petrov, Victor

    Cold War Computing, Bulgarian Modernization, and the Information Age behind the Iron Curtain

    (History of Computing)

    2023  

    Series title History of Computing
    Keywords Information technology: general issues ; History of engineering & technology ; Computer Science/History of Computing ; Science, Technology & Society/History of Technology ; Economics/Economic History ; Business/Business Technology
    Language English
    Size 1 electronic resource (424 pages)
    Publisher The MIT Press
    Publishing place Cambridge
    Document type Book ; Online
    Note English
    HBZ-ID HT030382562
    ISBN 9780262545129 ; 0262545128
    Database ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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  2. Article ; Online: ROS and Abiotic Stress in Plants 2.0.

    Petrov, Veselin / Gechev, Tsanko

    International journal of molecular sciences

    2023  Volume 24, Issue 15

    Abstract: Climate insecurity and extreme weather events have stimulated efforts to enhance plant resilience and productivity in adverse environmental conditions [ ... ]. ...

    Abstract Climate insecurity and extreme weather events have stimulated efforts to enhance plant resilience and productivity in adverse environmental conditions [...].
    MeSH term(s) Reactive Oxygen Species ; Plants ; Stress, Physiological ; Climate
    Chemical Substances Reactive Oxygen Species
    Language English
    Publishing date 2023-07-25
    Publishing country Switzerland
    Document type Editorial
    ZDB-ID 2019364-6
    ISSN 1422-0067 ; 1422-0067 ; 1661-6596
    ISSN (online) 1422-0067
    ISSN 1422-0067 ; 1661-6596
    DOI 10.3390/ijms241511917
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: [The associations of indices of echocardiography with polymorphism of genes of angiotensinogen and angiotensin receptor type I in examined patients with chronic rheumatic heart disease].

    Petrov, V S

    Problemy sotsial'noi gigieny, zdravookhraneniia i istorii meditsiny

    2020  Volume 28, Issue 2, Page(s) 234–238

    Abstract: The purpose of study is to evaluate associations of polymorphism of genes encoding components of renin-angiotensin system and indices of echocardiography in examined patients with rheumatic heart disease (RHD). The sampling consisted of 128 patients with ...

    Abstract The purpose of study is to evaluate associations of polymorphism of genes encoding components of renin-angiotensin system and indices of echocardiography in examined patients with rheumatic heart disease (RHD). The sampling consisted of 128 patients with RHD and average age 58,96±0,34 years. The echocardiography was implemented using Philips Affinity 50 machine. The genetic typing was carried out according polymorphic markers Thr174Met, Met235Thr and А1166С by polymerase chain reaction in real-time with electrophoretic scheme of detecting the result of "SNP-EXPRESS". The heterozygosis of Thr174Met results in larger dilatation of left sections of heart. The Thr174Thr homozygotes characterized by large linear dimensions of right heart. The Thr235Thr homozygotes characterized by minimal parameters reflecting hypertrophy of left ventricle of heart. There was no significant difference in echocardiography indices in patients with A1166A polymorphism. The mutations in codon 235 and 174 did not affect distance of 6-minute walk test. The statistically significant difference in the distance of 6-minute walk test was obtained only for А1166С: the minimum distance indicators is in the group of A1166C heterozygotes - 291,46 (273,83-309,09) meters and the maximum distance in С1166С homozygotes - 357,20 (309,21-405,19) meters. In patients with RHD, Thr174Met heterozygosis can lead to dilatation of left heart camera, while homozygosis for Thr174Mr leads to dilatation of right heart camera and left ventricular hypertrophy. The Met235Thr heterozygosis, on the contrary, are characterized by minimal sizes of left atrium and right ventricle. Polymorphism of the A1166C gene encoding angiotensin type I receptor had practically no effect on echocardiography indices in patients with RHD.
    MeSH term(s) Adult ; Angiotensinogen/genetics ; Echocardiography ; Humans ; Peptidyl-Dipeptidase A/genetics ; Polymorphism, Genetic ; Rheumatic Heart Disease
    Chemical Substances Angiotensinogen (11002-13-4) ; Peptidyl-Dipeptidase A (EC 3.4.15.1)
    Language Russian
    Publishing date 2020-04-17
    Publishing country Russia (Federation)
    Document type Journal Article
    ZDB-ID 1483853-9
    ISSN 0869-866X
    ISSN 0869-866X
    DOI 10.32687/0869-866X-2020-28-2-234-238
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Plant Systems Biology in 2022 and Beyond.

    Gechev, Tsanko / Petrov, Veselin

    International journal of molecular sciences

    2022  Volume 23, Issue 8

    Abstract: Plants have remarkable plasticity due to their vast genetic potential which interacts with many external factors and developmental signals to govern development and adaptation to changing environments [ ... ]. ...

    Abstract Plants have remarkable plasticity due to their vast genetic potential which interacts with many external factors and developmental signals to govern development and adaptation to changing environments [...].
    MeSH term(s) Acclimatization ; Adaptation, Physiological ; Plant Development/genetics ; Plants/genetics ; Systems Biology
    Language English
    Publishing date 2022-04-09
    Publishing country Switzerland
    Document type Editorial
    ZDB-ID 2019364-6
    ISSN 1422-0067 ; 1422-0067 ; 1661-6596
    ISSN (online) 1422-0067
    ISSN 1422-0067 ; 1661-6596
    DOI 10.3390/ijms23084159
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  5. Article ; Online: Luminescence of Binary-Doped Silica Aerogel Powders: A Two-Step Sol-Gel Approach.

    Shandurkov, Dimitar / Danchova, Nina / Spassov, Tony / Petrov, Vesselin / Gutzov, Stoyan

    Gels (Basel, Switzerland)

    2024  Volume 10, Issue 2

    Abstract: In this study, we report a novel synthesis of hydrophobic silica aerogel powder composites, functionalized and binary-doped with [Tb(phen) ...

    Abstract In this study, we report a novel synthesis of hydrophobic silica aerogel powder composites, functionalized and binary-doped with [Tb(phen)
    Language English
    Publishing date 2024-01-27
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2813982-3
    ISSN 2310-2861 ; 2310-2861
    ISSN (online) 2310-2861
    ISSN 2310-2861
    DOI 10.3390/gels10020104
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Refined Sellmeier equations for AgGaS

    Kato, Kiyoshi / Petrov, Valentin / Miyata, Kentaro

    Applied optics

    2023  Volume 62, Issue 24, Page(s) 6375–6379

    Abstract: We revisit the 90° phase-matching conditions for second-harmonic, sum-frequency, and difference-frequency generation ... ...

    Abstract We revisit the 90° phase-matching conditions for second-harmonic, sum-frequency, and difference-frequency generation in
    Language English
    Publishing date 2023-09-14
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4522
    ISSN (online) 1539-4522
    DOI 10.1364/AO.494375
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Sudebno-meditsinskie aspekty sozhzheniya trupov lyudei.

    Popov, V L / Petrov, V V

    Sudebno-meditsinskaia ekspertiza

    2021  Volume 64, Issue 5, Page(s) 22–26

    Abstract: Objective - to outline the basic ideas about the conditions and results of the burning of human corpses and the potential possibilities of a forensic medical examination of the burned remains. It is impossible to burn the corpse of an adult to a state of ...

    Title translation Forensic aspects of the burning of human corpses.
    Abstract Objective - to outline the basic ideas about the conditions and results of the burning of human corpses and the potential possibilities of a forensic medical examination of the burned remains. It is impossible to burn the corpse of an adult to a state of only homogeneous ash not only on the fire, but also in special crematorium chambers. After the burning of the corpse, ash and bone fragments remain in a state of black, gray and white heat. The state of the cremated remains allows, at least, establishing the number of incinerated corpses, their species and anatomical affiliation. Reconstruction of the conditions of corpse burning is possible only within the framework of a comprehensive forensic examination with the participation of specialists in the field of fire-technical affairs and forensic medical experts. The exclusive competence of specialists in the field of fire-technical affairs is the verification of the conditions of combustion (type and volume of fuel, technical features of combustion, duration of cremation, etc.).
    MeSH term(s) Accidents ; Adult ; Burns ; Cadaver ; Cremation ; Forensic Medicine ; Humans
    Language Russian
    Publishing date 2021-10-13
    Publishing country Russia (Federation)
    Document type Journal Article
    ZDB-ID 41012-3
    ISSN 0039-4521
    ISSN 0039-4521
    DOI 10.17116/sudmed20216405122
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Zs.B 968: Show issues Location:
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  8. Article: LASER THERMAL ABLATION OF BENIGN THYROID NODULES AS AN EFFECTIVE, SAFE AND MINIMALLY INVASIVE METHOD FOR TREATING NODULAR GOITER (REVIEW).

    Petrov, V / Molozhavenko, E / Ivashina, E / Sozonov, A / Baksheev, E

    Georgian medical news

    2021  , Issue 313, Page(s) 79–84

    Abstract: To search for effective and safe methods aimed at reducing the frequency of surgical treatment for nodular thyroid pathology. 1999-2019 literature review conducted using NLM databases. There is more and more evidence in the literature on the efficacy and ...

    Abstract To search for effective and safe methods aimed at reducing the frequency of surgical treatment for nodular thyroid pathology. 1999-2019 literature review conducted using NLM databases. There is more and more evidence in the literature on the efficacy and safety of minimally invasive treatments for thyroid nodular disease. Based on the literature data, it was revealed that the most effective technique for minimally invasive treatment is laser thermal ablation of thyroid nodules under visual control. This technique can be considered an alternative to surgical intervention in the treatment of benign thyroid nodules and, in most cases, leads to a decrease or complete disappearance of the nodule, clinical manifestations, or cosmetic defects. Unlike surgical treatment, it is practically devoid of the likelihood of formidable complications and, as a rule, passes without any threatening consequences for the patient. While the use of laser thermal ablation is expanding, the international medical community has begun to incorporate this technique into treatment guidelines and is making efforts to disseminate it in general clinical practice. Since the method of laser thermal ablation can be considered an effective alternative to surgical intervention for the treatment of benign thyroid nodules, it is necessary to widely introduce it into the general clinical practice in Russia and algorithms for providing medical care to patients with nodular goiter. The introduction of imaging-guided laser thermal ablation into clinical practice and its inclusion in the algorithms for the provision of medical care to patients with thyroid nodular pathology will significantly improve the quality and availability of medical care for patients with thyroid nodular pathology.
    MeSH term(s) Goiter, Nodular/surgery ; Humans ; Laser Therapy ; Lasers ; Russia ; Thyroid Nodule/surgery ; Treatment Outcome
    Language English
    Publishing date 2021-06-08
    Publishing country Georgia (Republic)
    Document type Journal Article
    ZDB-ID 2443648-3
    ISSN 1512-0112
    ISSN 1512-0112
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Enhanced Solubility of Ibuprofen by Complexation with β-Cyclodextrin and Citric Acid.

    Sarafska, Tsveta / Ivanova, Stanislava / Dudev, Todor / Tzachev, Christo / Petrov, Vesselin / Spassov, Tony

    Molecules (Basel, Switzerland)

    2024  Volume 29, Issue 7

    Abstract: The ability of β-CD to form inclusion complexes with ibuprofen (IBU) and at the same time to make a two-phase system with citric acid was explored in the present study for achieving improved solubility and dissolution rate of IBU. Mechanical milling as ... ...

    Abstract The ability of β-CD to form inclusion complexes with ibuprofen (IBU) and at the same time to make a two-phase system with citric acid was explored in the present study for achieving improved solubility and dissolution rate of IBU. Mechanical milling as well as mechanical milling combined with thermal annealing of the powder mixtures were applied as synthetic methods. Solubility and dissolution kinetics of the complexes were studied in compliance with European Pharmacopoeia (ICH Q4B). β-CD and citric acid (CA) molecules were shown to interact by both ball milling (BM), thermal annealing, as well as BM with subsequent annealing. Complexes were also formed by milling the three compounds (β-CD, CA and IBU) simultaneously, as well as by a consecutive first including IBU into β-CD and then binding the formed β-CD/IBU inclusion complex with CA. As a result, ternary β-CD/IBU/CA complex formed by initial incorporation of ibuprofen into β-CD, followed by successive formation of a two-phase mixture with CA, exhibited notably improved dissolution kinetics compared to the pure ibuprofen and slightly better compared to the binary β-CD/IBU system. Although the addition of CA to β-CD/IBU does not significantly increase the solubility rate of IBU, it must be considered that the amount of β-CD is significantly less in the ternary complex compared to the binary β-CD/IBU.
    MeSH term(s) Ibuprofen ; Solubility ; beta-Cyclodextrins ; Citric Acid ; Kinetics
    Chemical Substances Ibuprofen (WK2XYI10QM) ; beta-Cyclodextrins ; Citric Acid (2968PHW8QP)
    Language English
    Publishing date 2024-04-06
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 1413402-0
    ISSN 1420-3049 ; 1431-5165 ; 1420-3049
    ISSN (online) 1420-3049
    ISSN 1431-5165 ; 1420-3049
    DOI 10.3390/molecules29071650
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Functioning of Yeast Pma1 H+-ATPase under Changing Charge: Role of Asp739 and Arg811 Residues.

    Petrov, V V

    Biochemistry. Biokhimiia

    2017  Volume 82, Issue 1, Page(s) 46–59

    Abstract: The plasma membrane Pma1 H+-ATPase of the yeast Saccharomyces cerevisiae contains conserved residue Asp739 located at the interface of transmembrane segment M6 and the cytosol. Its replacement by Asn or Val (Petrov et al. (2000) J. Biol. Chem., 275, ... ...

    Abstract The plasma membrane Pma1 H+-ATPase of the yeast Saccharomyces cerevisiae contains conserved residue Asp739 located at the interface of transmembrane segment M6 and the cytosol. Its replacement by Asn or Val (Petrov et al. (2000) J. Biol. Chem., 275, 15709-15716) or by Ala (Miranda et al. (2011) Biochim. Biophys. Acta, 1808, 1781-1789) caused complete blockage of biogenesis of the enzyme, which did not reach secretory vesicles. It was proposed that a strong ionic bond (salt bridge) could be formed between this residue and positively charged residue(s) in close proximity, and the replacement D739A disrupted this bond. Based on a 3D homology model of the enzyme, it was suggested that the conserved Arg811 located in close proximity to Asp739 could be such stabilizing residue. To test this suggestion, single mutants with substituted Asp739 (D739V, D739N, D739A, and D739R) and Arg811 (R811L, R811M, R811A, and R811D) as well as double mutants carrying charge-neutralizing (D739A/R811A) or charge-swapping (D739R/R811D) substitutions were used. Expression of ATPases with single substitutions R811A and R811D were 38-63%, and their activities were 29-30% of the wild type level; ATP hydrolysis and H+ transport in these enzymes were essentially uncoupled. For the other substitutions including the double mutations, the biogenesis of the enzyme was practically blocked. These data confirm the important role of Asp739 and Arg811 residues for the biogenesis and function of the enzyme, suggesting their importance for defining H+ transport determinants but ruling out, however, the existence of a strong ionic bond (salt bridge) between these two residues and/or importance of such bridge for structure-function relationships in Pma1 H+-ATPase.
    MeSH term(s) Amino Acid Substitution ; Arginine/chemistry ; Arginine/genetics ; Aspartic Acid/chemistry ; Aspartic Acid/genetics ; Models, Molecular ; Mutation, Missense ; Proton-Translocating ATPases/chemistry ; Proton-Translocating ATPases/genetics ; Saccharomyces cerevisiae/enzymology ; Saccharomyces cerevisiae/genetics ; Saccharomyces cerevisiae Proteins/chemistry ; Saccharomyces cerevisiae Proteins/genetics ; Structural Homology, Protein ; Structure-Activity Relationship
    Chemical Substances Saccharomyces cerevisiae Proteins ; Aspartic Acid (30KYC7MIAI) ; Arginine (94ZLA3W45F) ; PMA1 protein, S cerevisiae (EC 3.6.1.-) ; Proton-Translocating ATPases (EC 3.6.3.14)
    Language English
    Publishing date 2017-01
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1109-5
    ISSN 1608-3040 ; 0006-2979 ; 0320-9717
    ISSN (online) 1608-3040
    ISSN 0006-2979 ; 0320-9717
    DOI 10.1134/S0006297917010059
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