1.Evaluation of the vaginal microenvironment in women of menopausal age
Tsevelmaa E ; Buyan-Ulzii Ch ; Lkham-Erdene G ; Pagmadulam S ; Munkhzul N
Diagnosis 2025;112(1):90-94
Postmenopausal estrogen deficiency can lead to genitourinary syndrome of menopause (GSM), which manifests as vaginal dryness, dyspareunia, and sexual dysfunction, among other clinical symptoms. These complications often result in emotional distress and a decline in overall quality of life (7). Several studies estimate that 25–50% of postmenopausal women experience symptoms such as pain during
intercourse, burning, itching, and dysuria due to vaginal atrophy and inflammation (9). Menopause is commonly diagnosed based on the absence of menstruation and hormone levels (10), but one of the simplest diagnostic methods is the evaluation of the vaginal microenvironment. There is limited
data in Mongolia regarding the vaginal microenvironment of perimenopausal and postmenopausal women and the factors influencing its changes. This gap in knowledge formed the basis of our study.
The aim of this research was to assess the vaginal microenvironment in menopausal women and to analyze its relationship with various influencing factors. We conducted a cross-sectional observational study using a descriptive research design. A total of 110 women aged 45–55 years, presenting with menopausal symptoms at “Santmaral” Women’s Clinic and the Women’s Outpatient Department of Songinokhairkhan Health Center, were selected for the study. Both quantitative and qualitative
research methods were employed, including surveys and physical examinations. Participants completed a 10-minute questionnaire consisting of 8 open-ended and 12 closed-ended questions. The vaginal microenvironment was assessed using special pH test strips applied to vaginal secretions. Data were analyzed using Excel 21 and SPSS 23, comparing the vaginal microenvironment with various influencing factors. The results showed that the average vaginal microenvironment pH among menopausal women was 5.18 ± 0.45 (n=110). In married women, the average pH was 5.1 ± 0.45; among women with a history of pregnancy, it was 4.10 ± 1.58; and among those who had given birth,
it was 2.8 ± 0.98 — indicating an abnormal vaginal microenvironment. Women who were using hormone replacement therapy had an average pH of 5.05 ± 0.45, while those using non-hormonal contraceptive methods had an average pH of 5.3 ± 0.43. These findings were statistically significant
(p = 0.0001****)
2.Insights Into JKMS Submissions and Medical Journal Publications in Korea
Jaehun JUNG ; Yumi JANG ; Munkhzul RADNAABAATAR ; Dae Sun JO ; Jong-Min KIM ; Jin-Hong YOO
Journal of Korean Medical Science 2025;40(1):e76-
We analyzed the publication and submission statuses of Korean medical journals from 2010 to 2024, amidst challenges impacting researchers. Data from 58 domestic journals identified through the 2023 JCR database were used to assess publication status, while data from the Journal of Korean Medical Science (JKMS) were utilized to examine submission status.The proportion of published original articles by domestic authors decreased by 3% in 2024 compared to 2023. Submissions to JKMS also decreased overall, except for slight increases in May and October 2024. In contrast, international submissions to JKMS showed consistent growth, surpassing the 15-year average, reflecting growing global interest. Addressing issues, including medical school admission policies and the lingering effects of coronavirus disease 2019, is vital to ensure a sustainable and thriving medical research environment in Korea.
3.Insights Into JKMS Submissions and Medical Journal Publications in Korea
Jaehun JUNG ; Yumi JANG ; Munkhzul RADNAABAATAR ; Dae Sun JO ; Jong-Min KIM ; Jin-Hong YOO
Journal of Korean Medical Science 2025;40(1):e76-
We analyzed the publication and submission statuses of Korean medical journals from 2010 to 2024, amidst challenges impacting researchers. Data from 58 domestic journals identified through the 2023 JCR database were used to assess publication status, while data from the Journal of Korean Medical Science (JKMS) were utilized to examine submission status.The proportion of published original articles by domestic authors decreased by 3% in 2024 compared to 2023. Submissions to JKMS also decreased overall, except for slight increases in May and October 2024. In contrast, international submissions to JKMS showed consistent growth, surpassing the 15-year average, reflecting growing global interest. Addressing issues, including medical school admission policies and the lingering effects of coronavirus disease 2019, is vital to ensure a sustainable and thriving medical research environment in Korea.
4.Insights Into JKMS Submissions and Medical Journal Publications in Korea
Jaehun JUNG ; Yumi JANG ; Munkhzul RADNAABAATAR ; Dae Sun JO ; Jong-Min KIM ; Jin-Hong YOO
Journal of Korean Medical Science 2025;40(1):e76-
We analyzed the publication and submission statuses of Korean medical journals from 2010 to 2024, amidst challenges impacting researchers. Data from 58 domestic journals identified through the 2023 JCR database were used to assess publication status, while data from the Journal of Korean Medical Science (JKMS) were utilized to examine submission status.The proportion of published original articles by domestic authors decreased by 3% in 2024 compared to 2023. Submissions to JKMS also decreased overall, except for slight increases in May and October 2024. In contrast, international submissions to JKMS showed consistent growth, surpassing the 15-year average, reflecting growing global interest. Addressing issues, including medical school admission policies and the lingering effects of coronavirus disease 2019, is vital to ensure a sustainable and thriving medical research environment in Korea.
5.Insights Into JKMS Submissions and Medical Journal Publications in Korea
Jaehun JUNG ; Yumi JANG ; Munkhzul RADNAABAATAR ; Dae Sun JO ; Jong-Min KIM ; Jin-Hong YOO
Journal of Korean Medical Science 2025;40(1):e76-
We analyzed the publication and submission statuses of Korean medical journals from 2010 to 2024, amidst challenges impacting researchers. Data from 58 domestic journals identified through the 2023 JCR database were used to assess publication status, while data from the Journal of Korean Medical Science (JKMS) were utilized to examine submission status.The proportion of published original articles by domestic authors decreased by 3% in 2024 compared to 2023. Submissions to JKMS also decreased overall, except for slight increases in May and October 2024. In contrast, international submissions to JKMS showed consistent growth, surpassing the 15-year average, reflecting growing global interest. Addressing issues, including medical school admission policies and the lingering effects of coronavirus disease 2019, is vital to ensure a sustainable and thriving medical research environment in Korea.
6.Impact of storage conditions on the antioxidant capacity of food plants
Munkhzul T ; Oyun-Erdene R ; Tulgaa S ; Nandin-Erdene M ; Buyankhuu T ; Munkhtsetseg J ; Odgerel Ch
Diagnosis 2025;114(3):112-118
Background:
Due to Mongolia’s harsh climate and seasonal limitations in fresh food supply, fruits, vegetables, and medicinal plants are often consumed in preserved forms. However, the preservation methods and storage conditions may significantly alter their antioxidant activity, which is crucial for mitigating oxidative stress and preventing chronic diseases.
Objective:
This study aimed to evaluate the antioxidant activity of 19 commonly consumed vegetables, berries, and dried medicinal plants under different storage conditions including fresh, cold storage (cellar), and frozen (-20°C).
Methods:
Samples were extracted in 80% methanol and tested using the DPPH radical scavenging assay. Absorbance was measured at 517 nm using a UV-Vis spectrophotometer. IC⁻⁻ values were calculated to compare antioxidant potency. Statistical differences were assessed using paired and unpaired t-tests with SPSS v27 (p<0.05)
Results:
Cold storage significantly reduced antioxidant activity in root vegetables, with IC⁻⁻ values increasing by 2.4 to 13.5 times (p<0.01), indicating diminished radical scavenging potencial. In contrast, frozen samples showed minimal change (p>0.05). Dried medicinal plants such as Rosa canina and Thymus serpyllum maintained strong activity, with IC⁻⁻<50 μg/mL.
Conclusion
Cellar storage leads to a notable decline in antioxidant capacity of common vegetables, while freezing is a more effective method for preservation. Dried medicinal herbs remain potent sources of antioxidants and may be recommended for year-round use in Mongolian diets.
7.Neuroticism as a risk factor for anxiety, depression, and insomnia during the covid-19 pandemic
Enkhtuvshin R ; Mongoljin A ; Munkhzul E ; Uranchimeg M ; Oyundari G ; Yerkibulan A ; Khishigsuren Z
Diagnosis 2025;115(4):36-42
Background:
The COVID-19 pandemic has profoundly impacted global mental health, exacerbating anxiety, depression, and insomnia, with prevalence rates of 25–30%, 27–32%, and 30–45%, respectively—2–3 times higher than pre-pandemic levels. Neuroticism, a key personality trait from the Big Five model, characterized by heightened negative emotions and stress reactivity, has been linked to increased vulnerability. Meta-analyses show neuroticism triples anxiety risk (OR=3.21; 95% CI: 2.35–4.39) and correlates strongly with insomnia (r=0.46, p<0.001) and depression during the pandemic. In Mongolia, empirical data on neuroticism's role remains limited.
Objective:
This study examines whether neuroticism acts as a risk factor for anxiety, depression, and insomnia among hospitalized patients during COVID-19.
Methods:
A cross-sectional descriptive study enrolled 552 patients (72.3% COVID-19 cases, 27.7% controls) from tertiary hospitals in Mongolia (2024). Participants (mean age 52.8±15.5 years; 60.5% female) completed self-reported questionnaires: Eysenck Personality Inventory (EPI) for neuroticism, PHQ-9 for depression, GAD 7 for anxiety, ISI for insomnia, and PCL 5 for PTSD. Sociodemographics were assessed. Data were analyzed using SPSS 26.0 with chi-square tests (p<0.05 significance). Instruments showed high reliability (Cronbach’s α=0.81–0.89). Ethical approval was obtained from MNUMS Ethics Committee (No. 2024-Psy-17).
Results:
Overall, 79.5% were depression free, 84.8% anxiety-free, and 77.5% insomnia-free. High neuroticism (n=381) was significantly associated with depression (24.4% vs. 11.7%, p<0.001), anxiety (18.6% vs. 7.6%, p<0.001), insomnia (28.3% vs. 9.4%, p<0.001), and any mental disorder (21.3% vs. 7%, p<0.001), but not PTSD (p=0.472). Cholerics (n=200) showed elevated risks (depression 29.5%, insomnia 34.5%, p<0.001), while sanguines/phlegmatics were protective. Verbal expression and trust levels showed no significant associations.
Conclusion
Neuroticism significantly heightens risks for anxiety, depression, and insomnia during COVID-19, underscoring the need for targeted psychological interventions. Temperament-informed screening could enhance prevention strategies in crisis settings.
8.Study of the stomatal cell in certain saponin containing medicinal plants in mongolia
Nurdana B ; Khulangoо B ; Densmaa L ; Norovnyam R ; Enkhtuul B ; Khuvtavilan B ; Munkhzul B ; Buyanjargal E ; Daariimaa Kh ; Enkhjargal D ; Turtushikh D ; Amarjargal T
Mongolian Journal of Health Sciences 2025;89(5):33-38
Background:
Saponins are secondary metabolites in plants that play an important role in defense mechanisms and
physiological processes. Since stomatal cells are crucial for gas exchange and water balance in plant tissues, studying the
anatomical and biochemical features of stomatal cells in saponin-rich plant species provides insight into the interactions
between these compounds and cellular mechanisms. This serves as the basis of our study.
Aim:
To determine the structure, types, and functions of stomatal cells in saponin-containing medicinal plants
Materials and Methods:
During June–September 2024, nine species of saponin-containing medicinal plants were
collected from Bulgan, Tuv provinces, and “Gorkhi-Terelj National Park” in Mongolia. Prepared microscopic specimens
were examined using macroscopic and microscopic techniques to study the structure, position, number, and epidermal
features of stomatal cells.
Results:
The study revealed that Anemone crinita Juz. exhibited the highest stomatal density (107 stomata/mm²) and
epidermal cell density (229 cells/mm²), indicating strong adaptation and protective capacity in arid conditions. Vicia
baicalensis (Turcz.) B. Fedtsch. showed the highest stomatal index (39.6), highlighting its significant role in regulating
transpiration. Stomatal types varied among species:
• Anomocytic stomata were observed in Potentilla multifida and Vicia baicalensis.
• Anisocytic stomata were found in Delphinium grandiflorum and Ranunculus borealis.
• Paracytic stomata were present in Gentiana algida, Adenophora remotiflora, Helianthemum nummularium,
Anemone crinita, and Ranunculus acris.
Conclution
In the study of the structure, form, and number of stomatal cells in saponin-containing plants growing in
Mongolia, Anemone crinita Juz. was found to have the highest number of stomatal and epidermal cells, indicating its high
efficiency in gas exchange, water regulation, and protection against external stress. Furthermore, Vicia baicalensis (Turcz.)
B.Fedtsch. showed the highest stomatal index, confirming its strong capacity for active regulation of gas exchange.
The variation in stomatal cell types among plant species was identified as playing an important role in ecological and
biological adaptation as well as protective mechanisms.
9.Microscopic structure and histochemical study of Gentiana decumbens L.f.
Nurdana B ; Densmaa L ; Enkhtuul B ; Khuvtavilan B ; Munkhzul B ; Buyanjargal E ; Daariimaa Kh ; Amarjargal Ts
Mongolian Journal of Health Sciences 2025;90(6):128-134
Background:
Plants of the family Gentianaceae in Mongolia are rich in bitter iridoid glycosides, flavonoids, and polyphenolic
compounds, and have been traditionally used in Mongolian medicine to promote digestion, protect the liver, and
reduce fever. However, standardized information on the micro-morphology and histochemical characteristics of the widely
distributed species Gentiana decumbens L.f. is scarce, limiting the assessment of its quality as a medicinal raw material.
Aim:
To identify the morphological and anatomical characteristics of the aerial and underground parts of Gentiana decumbens
and to localize the distribution of starch, polysaccharides, and phenolic compounds using histochemical methods.
Materials and Methods:
Plant materials were collected in July 2024 from Tsagaan-Uul soum, Khuvsgul province, andshade-dried. Samples were softened in a water–ethanol–glycerol solution (1:1:1) for 24 hours, and transverse and longitudinal
sections of stem, leaf, root, and floral parts (anther, petal, receptacle/bract) were prepared using a hand microtome.
Sections were cleared with 10% chloral hydrate. Histochemical reagents included potassium dichromate (K2Cr2O7), ferric
chloride (FeCl3), Lugol’s iodine (I₂+KI), thymol + concentrated H₂SO₄, and methylene blue. Slides were mounted in
glycerin and examined under an Olympus light microscope at 40× and 100× magnifications, and images were recorded
using a 12 MP digital camera.
Results:
Leaf: The leaf exhibits a dorsiventral structure with a dense palisade parenchyma on the adaxial side and a
loosely arranged spongy mesophyll on the abaxial side. Stomata are hypostomatic, and collenchyma is well developed
around the vascular bundles. Histochemical reactions were negative for starch and phenolic compounds. Stem: The stem
consists of an epidermis, a wide cortex, a continuous ring of sclerenchyma, 12–15 collateral vascular bundles, and a broad
central parenchyma. Histochemical tests showed a brownish-yellow coloration with potassium dichromate (K2Cr2O7),
indicating the presence of polyphenols and lignin, and a brown coloration with Lugol’s iodine, confirming the presence
of starch. Reactions with ferric chloride (FeCl₃), methylene blue, and thymol + H2SO4 were mostly negative in cross sections.
However, in longitudinal sections, Lugol’s and thymol + H2SO4 showed positive reactions, suggesting the presence
of starch and polysaccharides, respectively. Root: The root displays a primary structure with radial xylem and phloem,
a distinct endodermis with Casparian strips, and a pericycle layer. Positive reactions were observed with K2Cr2O7 and
FeCl₃, indicating phenolic compounds and lignin. Lugol’s iodine showed abundant starch granules in parenchyma cells.
Receptacle / Bract: The receptacle is covered by a thick cuticular epidermis with trichomes, and composed of outer and
central parenchyma layers containing numerous small closed (amphivasal-type) vascular bundles. Positive reactions were
detected with K2Cr2O7 and FeCl₃, indicating polyphenols, flavonoids, and tannins; Lugol’s iodine confirmed the presence
of starch; thymol + H2SO4 showed partial positivity for polysaccharides. Stamen (longitudinal section): The stamen structure
includes epidermis, endothecium, pollen sacs, and a distinct vascular bundle. Positive staining was observed with
K2Cr2O7, Lugol’s iodine, and FeCl3, confirming the presence of polyphenolic compounds, lignified elements, and starch.
Conclusion
The anatomical features of G. decumbens indicate adaptations to dry, high-light environments through
well-developed mechanical strengthening (sclerenchymatous ring), efficient photosynthetic structure (compact palisade
mesophyll), and nutrient storage (starch-rich pith and cortex). Histochemical analysis revealed the localization of polyphenolic
compounds and starch/polysaccharides mainly in the root, stem, and floral organs, while absent in the leaves,
demonstrating organ-specific accumulation patterns. These findings scientifically support the plant’s traditional medicinal
uses for digestive stimulation and hepatoprotection.
10.Results of the study on pathogens in vaginal smear tests
Mungunshagai A ; Oyun-Erdene R ; Munkhzul N
Mongolian Medical Sciences 2024;208(2):3-7
Introduction:
Although bacterial vaginosis prevalence varies across countries and populations, recent systematic
reviews and meta-analyses indicate that 23–29% of women of reproductive age are infected. Each
year, 21.2 million (22.9%) women between the ages of 14 and 49 in the United States develop bacterial
vaginosis. Microenvironments are interconnected with the endocrine, immune, and other organ
systems and dependent upon external and internal environmental influences. In women between the
ages of 15 and 44, bacterial vaginosis is the most common vaginal disorder, according to the Centers
for Disease Control and Prevention.
In our nation, 93.4% of women who are of reproductive age have vaginalis; the percentage of cases
with Gardnerella vaginalis alone is 22.6%, and 53.1% have it in combination with other anaerobic
bacteria, which is a significant percentage. Our research is based on the lack of information about the
vaginal environment of Mongolian women and factors influencing changes in the microenvironment.
Our research is based on the lack of information about the vaginal environment of Mongolian women
and factors influencing changes in the microenvironment.
Goal:
The objective is to study how age relates to the development of bacterial and fungal vaginitis through
the analysis of vaginal swabs.
Materials and Methods:
For our study, we selected 100 women aged 20-59 through targeted sampling from clients who
underwent vaginal smear tests at “Yu Bi Lab” laboratory and “Tsetsuu” diagnostic center in Ulaanbaatar
in 2023. Vaginal smear analysis was conducted using Nugent’s criteria and Gram staining. Statistical
analysis was performed by comparing pathogens among the participants based on age using
Pearson’s correlation method. We obtained permission to conduct research.
Through the Etugen University Biomedical Ethics Comittee convention held on march 11,2024
Results:
The study divided 100 women into four age groups to examine the vaginal environment with their age
and the factors influencing it. The research aimed to understand how bacterial vaginitis and fungal
vaginitis evolve during reproductive age and menopause. Among the age groups, women aged 20-29
had an average of 5.59±3.35 epithelial cells (n=32), those aged 30-39 had 6.10±3.29 (n=37), women
aged 40-49 had 6.70±3.90 (n=17), and women aged 50-59 had the highest number of epithelial cells
at 9.42±8.19 (n=14), representing 34% of the group.
Conclusion
1. Women of reproductive and menopausal age experience changes in the vaginal environment due to
various factors. This includes a decrease in the ratio of normal microorganisms and lactobacilli, an increase in the number of conditional pathogens, and the development of an alkaline environment
in the vagina.
2. Bacterial vaginitis predominantly affects younger women, with symptoms often being subtle. In
contrast, fungal vaginitis is more common among menopausal women. Lower estrogen levels in
women in this age group cause lactobacilli to break down glycogen less efficiently into lactic acid,
even though the number of lactobacilli is still normal. This research implies that suppositories and
estrogen pills may help treat these problems for women between the ages of 40 and 59.

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