Lithuanian University of Health Sciences Research Management System (CRIS)





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  • conference paper; ;
    Valeika, Virgilijus
    ;
    Proceedings of the 7th International Conference on Advanced Material and Systems (ICAMS 2018) : Bucharest, Romania, October 18th - 20th, 2018 / Editors: Luminiţa Albu, Viorica Deselnicu, 2018-10-18, p. 117-122

    The most effective means to protect against bacterial invasion and to reduce the risk of dangerous infections are antibacterial components synthesis. Preliminary investigations show that hybrid coatings of graphene oxide doped with silver and copper nanoparticles have long-term bactericidal effect on a wide spectrum of standard bacterial strains. In this study the possibilities to use hybrid graphene oxide and metal nanoparticles composites for the inhibition not only standard bacteria, but also clinically important bacteria strains, which have developed multiple resistances to antibiotics, have been investigated. Resistant to antibiotics bacteria often cause dangerous infections in medical institutions of many countries due to the acquired resistance to many classes of antibiotics and the ability to obtain resistance to all antibiotics through mutations. Nanocomposite samples were characterized by TEM and SEM microscopy. The antibacterial activity was evaluated against gram-negative, gram-positive and clinical antibiotics resistant A. baumannii bacteria strains by solutions dilution method. The investigations demonstrated that hybrid nanocomposite shows synergistic mechanism of action and characterizes high efficiency against multidrug-resistant bacteria, such as A. baumannii bacteria strains decrease of viability.

  • research article
    Pranaitytė, Guoda
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    Grybaitė, Birutė
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    Mickevičius, Vytautas
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    Scientific Reports, 2025-05-21, vol. 15, no. 1, p. 1-16

    1-Substituted 5-oxopyrrolidine-3-carboxylic acid and its derivatives play an important role as components of many biologically active molecules. This study describes the synthesis of 1-(2,4-difluorophenyl)-5-oxopyrrolidine-3-carboxylic acid derivatives and their anticancer properties. The target compounds were prepared using 2,4-difluoroniline as a starting material; in this way, derivatives of benzimidazoles, hydrazones and azoles were formed. Investigation of the anticancer activity of all synthesized compounds showed that the hydrazones had the strongest effect on cancer cell lines. Compounds were tested for their cytotoxic effect by the MTT assay in human triple-negative breast cancer MDA-MB-231, prostate adenocarcinoma PPC1, melanoma A375 and human foreskin fibroblasts CRL-4001 after 72 hours of incubation. The impact of the compounds on cancer cell migration was assessed using a 'wound healing assay'. Activity in 3D cultures was determined by evaluating changes in spheroid size and assessing cell viability. Overall, the selected compounds 7b, 9c, 9e, 9f and 10 exhibited greater activity in the A375 cell line and were less active against the MDA-MB-231 cell line. Compounds 9c, 9e and 10 showed relatively higher selectivity for cancer cells over fibroblasts. Hydrazone 9f, bearing N'-(4-methylbenzylidene) moiety, was identifiedasthe most cytotoxic compound in both prostate adenocarcinoma PPC-1 and melanoma A375 cells in monolayer and 3D culture models. Compound 9e, with N'-(4-bromobenzylidene) moiety, exhibited the most pronounced inhibitory effect on cell migration as determined by the 'wound healing' assay.

  • ETD
    The Relationship between Sedentary Lifestyle and Increased Probability of Having Lower Back Pain in International Students at the Lithuanian University of Health Sciences
    [Lietuvos sveikatos mokslų universiteto užsienio studentų gyvenimo būdo ir padidėjusios tikimybės patirti apatinės nugaros dalies skausmą ryšys]
    bachelor thesis
    Truman, Roy Reuven
    2025-06-03

    Roy Truman: „Lietuvos sveikatos mokslų universiteto užsienio studentų gyvenimo būdo ir padidėjusios tikimybės patirti apatinės nugaros dalies skausmą ryšys“. Darbo vadovas: Asistentė Brigita Siparytė-Sinkevičienė. Lietuvos sveikatos mokslų universitetas, Medicinos akademija, Slaugos Fakultetas, Reabilitacijos klinika, Kaunas, 2025; 45. Tyrimo tikslas: Šio tyrimo tikslas - ištirti apatinės nugaros dalies skausmo (ANDS) paplitimą tarp Lietuvos sveikatos mokslų universiteto (LSMU) užsienio student, ir nustatyti pagrindinius veiksnius, lemiančius šio skausmo atsiradimą, ypatingą dėmesį skiriant fizinio aktyvumo lygiui, sėdimam elgesiui ir su mokslu susijusiems stresoriams. Tyrimo uždaviniai:

    1. Įvertinti ANDS paplitimą tarp užsieniečių studentų.
    2. Išnagrinėti fizinio aktyvumo ir ANDS ryšį.
    3. Įvertinti, kaip nejudrus gyvenimo būdas ir ilgalaikis sėdėjimas veikia ANDS.
    4. Išnagrinėti papildomus veiksnius, tokius kaip akademinis krūvis, jo sąsajas su ANDS.
    5. Pateikti prevencinių priemonių ir fizinio aktyvumo rekomendacijas, skirtoms mažinti ANDS. Tyrimo metodologija: Tyrimui naudotas kiekybinis skersinio pjūvio tyrimo metodas. Duomenys surinkti naudojant struktūruotą apklausą, kurioje buvo išskirti demografiniai duomenys, fizinio aktyvumo lygis, sėdėjimo trukmė ir ANDS atsiradimas. Statistinė analizė atlikta siekiant nustatyti koreliacijas tarp ANDS ir tiriamųjų. Tyrimo dalyviai: Tyrimo imtį sudarė sveikatos mokslų univeristete studijujantys užsienio studentai. Dalyviai atrinkti anketavimo principu, o surinkti atsakymai analizuoti siekiant įvertinti ANDS paplitimą ir jo sąsajas su fiziniu aktyvumu bei sėdėjimu. Išvados. 1. Išvados rodo didelį nugaros skausmo paplitimą tarp LSMU tarptautinių studentų, maždaug du trečdaliai respondentų nurodė patyrę LBP.
    6. Dauguma tarptautinių studentų buvo priskirti prie pakankamai aktyvių. Kai kurie studentai pranešė apie mažą arba vidutinį fizinį aktyvumą tam tikrose srityse. Statistiškai reikšmingo ryšio tarp fizinio aktyvumo ir nugaros skausmų nebuvo, tačiau pastebima tendencija, kad aukštesnio fizinio aktyvumo mokiniai gali patirti mažiau nugaros skausmų.
    7. Tarptautinių studentų imtyje reikšmingo ryšio tarp sėdėjimo elgesio ir apatinės nugaros dalies skausmo nebuvo. Tačiau studentai, įstoję į Medicinos fakultetą, pranešė apie didesnį LBP paplitimą, galbūt dėl ilgų studijų valandų ir akademinio streso, o tai rodo, kad disciplinai būdingi akademiniai reikalavimai gali turėti įtakos.
    8. Išvados rodo, kad akademinis darbo krūvis gali būti pagrindinis LSMU tarptautinių studentų LBP plėtros veiksnys.
    9. Tyrimas pabrėžia tikslinių ergonominių ir laikysenos sveikatos intervencijų poreikį universiteto aplinkoje.

    Raktažodžiai: Apatinės nugaros dalies skausmas; Paplitimas; Fizinis aktyvumas; Sėdimas gyvenimo būdas; Akademinis krūvis.

  • research article; ; ;
    Scientific Reports, 2025-05-20, vol. 15, no. 1, p. 1-12

    The growth and development of the maxillofacial complex share a common embryological origin with the cranial base and upper cervical spine; therefore, anomalies in these regions may be linked to variations in the skeletal pattern. This study aimed to evaluate the relationships between the morphological features of the sella turcica bridging, ponticulus posticus, posterior arch deficiency of the first cervical vertebra, known as the atlas, and the cervical vertebral maturation stages and vertical malocclusions. Randomly selected 300 pre-orthodontic treatment patients (aged 7 to 40 years) were divided into groups according to cervical stage (CS1–CS6) and type of vertical malocclusion. According to the study protocol, cephalometric analysis and evaluation of the sella turcica and atlas were performed twice by two researchers under the supervision of a radiologist. Statistical analysis was performed using SPSS 29.0. Sella turcica bridging was significantly more common in postpubertal patients (58.2%; p < 0.05). Ponticulus posticus and sella turcica bridging occurred more frequently in patients with low mandibular plane angle (43.3% and 51.1%, respectively), whereas atlas posterior arch deficiency occurred more frequently in patients with high mandibular plane angle (24.2%). However, only atlas posterior arch deficiency showed significant difference (p < 0.05). According to logistic regression, patients in the CS6 stage were less likely to have type 1 ponticulus posticus and more likely to have type 2 sella turcica bridging (p < 0.05). Patients with low angle were less likely to have atlas posterior arch deficiency (p < 0.05). Sella turcica bridging and atlas posterior arch deficiency are associated with the skeletal pattern and cervical stage. Sella turcica bridging was more prevalent during the postpubertal period, whereas atlas posterior arch deficiency was more prevalent in those with a high mandibular plane angle.

  • journal-article;
    Camargo do Amaral, Rafael
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    Witt, Kristian Lybek
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    Joergensen, Jens Noesgaard
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    Eisner, Ivan
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    Fermentation, 2025-05-21, vol. 11, no. 5, p. 1-18

    This study aimed to provide deeper insights into fermentation dynamics, aerobic stability, and bacterial community composition during the short-term ensiling of maize forage with lactic acid bacteria-based inoculants. A 50:50 combination of Lentilactobacillus buchneri DSM2250 and Lactococcus lactis DSM11037 (LBL target application: 150,000 CFU per 1 g forage) was tested alongside an untreated control (C) over fermentation periods of 2, 4, 8, 16, and 32 days. A total of 50 3 L mini-silos were filled with 2 kg of fresh maize each and stored at 20 °C. The pH, dry matter, nutrient profiles, volatile fatty acids, lactic acid, alcohols, ammonia-N, microbiological counts (yeast and mold), and aerobic stability of all samples were analyzed after seven days of air exposure. LBL silage showed higher average dry matter content (DMc) and crude protein (CP) levels by 1.5%, p < 0.001, and 10.8%, p < 0.001, respectively, as well as reduced average dry matter (DM) losses by half (p < 0.001) compared to pure silage. The beneficial effects of inoculation became more pronounced with prolonged storage, particularly by day 32 of fermentation. LBL silage showed increased production of lactic and acetic acids by an average of 55.5% and 5.0%, respectively, (p < 0.01) and significantly reduced butyric acid formation by approximately 14 times. Ethanol and ammonia-N concentrations were also reduced by 55.4% and 25.6%, respectively (p < 0.001), while the pH value remained 0.17 units lower (p < 0.001) compared to the control. The combination of the two strains improved silage aerobic stability by 2.4 days (p < 0.001) and extended shelf life by reducing yeast counts (8.02 vs. 7.35 log10CFU g−1 FM, p < 0.001), while maintaining the pH value close to its initial level. Therefore, compared to the untreated control, the inoculated silage exhibited higher nutritional value, reduced fermentation losses, and suppressed undesirable microbial activity. The positive effects of inoculation became increasingly evident over time, particularly by day 32, highlighting the synergistic benefits of using mixed-strain lactic acid bacteria. These findings support the use of LBL inoculants as an effective strategy to enhance short-term silage quality and stability.

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  • journal article
    Lietuvos bendrosios praktikos gydytojas. Kaunas : Vitae Litera, 2008, t. 12, Nr. 10., p. 679-681.

    Lėtinis atrofinis gastritas – tai ilgalaikio lėtinio skrandžio uždegimo sąlygota skrandžio gleivinės atrofija. Atrofinio gastrito fone vystosi metaplazija žarninio tipo epiteliu, vėliau epitelio displazija ir skrandžio vėžys. Atrofija ir žarninė metaplazija apibūdinamos kaip ikivėžinės būklės. Skrandžio gleivinės atrofija ir žarninė metaplazija yra dažnesnės šalyse, kuriose yra didelis sergamumas skrandžio vėžiu. Atrofinis gastritas laikomas ikivėžine liga, tačiau nėra visiškai aišku, ar galimas atrofijos proceso sustabdymas, ar tai leidžia apsaugoti nuo skrandžio vėžio.

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