1.IMPLEMENTATION ANALYSIS OF THE UNIVERSITY MANAGEMENT SYSTEM AT THE MONGOLIAN NATIONAL UNIVERSITY OF MEDICAL SCIENCES
Naranbat G ; Oyungoo B ; Bayanmunkh B
Innovation 2018;12(2):16-19
BACKGROUND. UNIFACE 4.0 program has started implementing of UNIFACE 4.0 program for training since 2004 at MNUMS.
In 2008, registration and information of the six branch schools, MNUMS had been transformed into electronic forms. Since 2010, the electronic form and an integrated information environment has been reached all schools equally.
The business Plan of MNUMS is to become “Open School” under the strategic goal, and UNIMIS is being introduced and implementing by the Presidential ordinance A/55, on May 06, 2015.
OBJECTIVE. To analyze the implementation of the university management information system and determine future trends and approaches
RESULTS. In the survey, 7.89% of the subjects were the first group (teachers) responded that it was not appropriate to continue using UNIMIS for training, were below the average, 39.47% of the teachers responded that it was appropriate in some ways and 52.68% said that they would be better useful than average. 15.76% of the subjects were the second group (students) surveyed were moderately unsuitable, 43.15% responded that they were some appropriately, and 41.08% said that they were moderate or higher useful for them. To fulfill consistently the development of UNIMIS in the near future is required to enhance the training specific characteristics and the period, which is the foundation for further application of this program. Over 90% of the teachers who in the study answered that they only used the grades putting into the UNIMIS, the remaining percentages were asked for using students’ self-study and taking a survey. There are many modules in the UNIMIS program, but they are mostly used for students’ grades in it. For teachers, it may be due to a lack knowledge of about UNIMIS.The foundation for further application of this program is required to fulfill and develop UNIMIS permanently with the training specific characteristics and the period.
CONCLUSION. In UNIMIS, there are many issues; inadequate for registration and information (data), incomplete of system usage and applications, not well educated, unsuffiency and a lack of technical and technological safety.
2.Pharmacological studies of anti-hangover preparation
Oyunchimeg B ; Bayanmunkh A ; Davaasambuu T ; Sosorburam B ; Chimgee TS ; Chuluuntsetseg J ; Lkhagva L ; Khurelbaatar L
Mongolian Medical Sciences 2016;175(1):70-73
IntroductionA hangover is the experience of various unpleasant physiological and psychological effects followingconsumption of alcohol beverages, which can last for more than 24 hours. Common symptoms ofhangover are headache, gastrointestinal complaints, sweating, hyper-excitability, dry mouth, anorexia,diarrhea, dizziness, fatigue and vertigo. Alcohol or ethanol gets metabolized to an intermediate product,acetaldehyde, by the enzyme alcohol dehydrogenase (ADH), and then acetaldehyde is converted toacetate by a second enzyme aldehyde dehydrogenase (ALDH). Acetaldehyde causes toxic effects,such as high pulse, rate, sweating and vomiting. In most people, ALDH metabolizes acetaldehydequickly and effi ciently, so that this intermediate metabolite does not accumulate in high concentrations.Many treatments are described to prevent hangover, shorten its duration, and reduce the severity of itssymptoms, including innumerable folk remedies and recommendations.GoalThis study was conducted to investigate whether anti-hangover preparation has a protective effectagainst acute alcohol induced hangover in Wistar rats.Materials and MethodsMale and female Wistar line rats, weighing 180-210g were used for hangover model or ethanolmetabolism experiment. Rats were administered orally ethanol as 38% aqueous solution with feedingneedle, 1 ml/200g body weight. The anti-hangover preparation was administered 1 hour before ethanolconsumption. Blood was collected from the tail vein for the measurement of serum acetate andacetaldehyde at just before and 8, 16, 24 hour after ethanol administration.Statistical analysis: All value expressed as mean S.E obtained from n number of experiments.ResultFrom this study results summarize that the anti-hangover preparations decreased blood serum acetateand acetaldehyde levels as compared to control. Anti-hangover preparations enhanced acetaldehydeand acetate metabolism.Conclusion: These fi ndings indicate that anti-hangover preparations may exert benefi cial role inthe treatment of alcohol hangover without any toxicity. Therefore, the content of acetaldehyde wasdecreasing and increasing through repeating 8 hours within 24 hours.
3.The pharmacology study result of kidney inflammation treatment active preparation
Davaasambuu T ; Chimgee TS ; Khashchuluu B ; Bayaraa S ; Odchimeg B ; Bayanmunkh A ; Lkhagva L ; Khurelbaatar L
Mongolian Medical Sciences 2014;169(3):55-58
IntroductionNumber of kidney acute and chronic disease is increasing rapidly in the world and becoming the majorcause of death even population employment capacity is invalid. Statistical report of Mongolian Ministryof Health last 5 years statistic kidney disease is in the 3rd of non-contagious disease Synthetic andchemical medicines used for this sort of disease would have side effects in some cases. Plants, animalsand minerals biologically active substances, side effects need to produce new drugs, has attracted theattention of researches.GoalIdentifying pharmacology act of new granule medicine preparation.Material and Methods: The effects of the medicinal substances were investigated on “WISTAR” linesof white rat. Pathological model of nephritis was formed by injected the rats with kanamycin sulfate(Mondodoev.A.J, Lameza.S.B, Bartonov.E.A, 1988). The experimental animals were given any of thenew granular herbal medicine and compared to the rats given Nefromon. After treatment the creatinine,urea acid and MDA in the serum were determined. MDA is identified by an amount of concentration andmethod (Stalinaya. I.D. 1977).ResultCreatinine amount of disease model group of kidney illness created by kanamycin sulfate is comparedwith healthy group animals and 1.64 times, carbamide amount is 4.25 times, rest of the azote’s 2.73are increased and comparing the experiment group creatinine amount is 1.65 creatinine amount is 1.65decreased comparing with disease model group.ConclusionWhen compound ingredients preparation creates experiment animal kanamycin sulfate oxidantdominates, intensify the kidney cell active, decrease the carbamide and creatinine and decrease thekidney cell necrosis.
4.Biochemical and pharmacological studies of bovine liver hydrolysate
Oyunchimeg B ; Bayanmunkh A ; Davaasambuu T ; Chimegee TS ; Sosorburam B ; Narangerel B ; Lkhagva L ; Khurelbaatar L ; Bayarjargal M ; Gan-Erdene T
Mongolian Medical Sciences 2013;164(2):82-88
BackgroundPreliminary clinical studies indicate that liver extract may be helpful in treating hepatic dysfunction. In addition, liver extract seems to work synergistically with interferon in treating hepatitis C and other viral infections. Laboratory studies indicate that liver extract may have some effects that could be useful in treating certain forms of cancer, such as ability to direct migration of metastasizing cells and inhibition of DNA, RNA and protein formation. More research is needed in these areas to determine liver hydrolysate’s properties.Materials and MethodsSeveral biochemical methods were used for determination of chemical compounds in liver extracts: Total protein and nitrogen content was determined by Kjeldahl method; mineral contents – atomic absorption spectrophotometer; Heme iron content – spectrophotometer; Water soluble vitamins - HPLC method. The pharmacological activities of bovine liver were tested by several pharmacological methods: Acute toxicity – LD50 /Prozorovskii 1978/; Acute hepatitis – Carbon tetrachloride (CCl4) induced liver damage in rats /Skakun et al, 1984/; Biochemical parameters in blood serum – Automatic biochemical analyzer.ResultThe values obtained in determination of the biochemical analysis show that 100 g consumption of studied liver hydrolysate can provide 4.3, 2.1 and 0.3 mg vitamin B1, B3 and B9 respectively. Therefore, present data reveal that liver hydrolysate is a good source of most of the analyzed minerals. The liver hydrolysate contains 56.4% total protein and 4.33% amino nutrient.Conclusions:1. From the results of pharmacological study that involves CCl4 induced acute toxic hepatitis, liver hydrolysate has hepatoprotective effect by protecting the liver cells from injury, improving the regeneration process and by correcting metabolic functions of the liver.2. When tested, hydrolysate’s pharmacological parameters can be analyzed reliably with several liver damage experimental designs, further improvements or the use of new designs such as anemia is needed in further pharmacological study.
5.Comparative study of fatty acid composition of anti-cancer Ellipin preparation at the production stage
Badamtsetseg S ; Bayanmunkh A ; Uuganbayar M ; Battulga B ; Radnaeva L D ; Lkhagva L ; Khurelbaatar L
Mongolian Medical Sciences 2014;170(4):73-77
Introduction. Monos Group, Drug Research Institute is starting to investigate of Ellipin preparationfrom the mid-1990s, Ellipin has anti cancer activity in liver and several studies were investigated withscientists from Japan and China. Especially Hayashi K., Khurelbaatar L and Ambaga M were determinedanti-cancer action of the preparation and they were explained of mechanism of action, which apoptosisis seduced by influence of unsaturated fatty acids in tumor cells. However, changes of fatty acidscomposition at production stage were did not study yet. Therefore, we studied that composition of fattyacids in different term of production stage and compared of Ellipin dense substance.Materials and Methods. Samples of study were collected from production stage of “Ellipin” series130304, which was tacked in 48th hour, 120th hour of production. Each sample was dried at freezedryer “Labconco freezone12L” in Drug Research Institute. Total lipids of sample were extracted withchloroform: methanol (2: 1 v/v) according to Folch et al. Fatty acid methyl esters were analyzed usingAgilent Packard Gas Chromatograph (GC) (Model HP-6890 Agilent Packard) with mass-spectrumdetector (Model HP MSD 5973N) of Buryat State University, in Ulan-Ude.Results. Ellipin preparation is derived from bovine liver, and which is based on homogenization of bovineliver for isotonic. In this process, unsaturated fatty acids were extracted in organic solution. We studiedchanges which saturated and unsaturated fatty acids of bovine liver in process of homogenization andconsist of each fatty acid contents of end product. Results have shown that unsaturated fatty acidswere decreased by 0.4-44% till 120th hour of homogenization process. While, there were decreasedby 4-12% in the end product, although, ω-6 fatty acids were increased by 13.1-38.4%. Moreover, 25saturated fatty acids and 12 unsaturated fatty acids were detected in the Ellipin dense substance (endproduct). Hence, 67.5% of total fatty acid was saturated fatty acids, 32.5% was unsaturated fatty acidsin the Ellipin dense substance. Resent results and results of previous studies indicated that Ellipindense substance may contains saturated fatty acids on in average 50.34%, unsaturated fatty acids onin average 49,32%, respectively.Conclusion. Proportion of saturated and unsaturated fatty acids in Ellipin production was about 2:1.Saturated fatty acids and unsaturated fatty acids were found 25 and 12, respectively. Saturated fattyacids were gradually decreased and unsaturated fatty acids were slowly increased in production period,which from 48th hour of production-conveyer till end product. Moreover, content of ω-3-6-9 fatty acidswas consist 83,9-87,5% of total unsaturated fatty acid.
6.Effect of Immunos on immune response cells by azathioprine Induced immunosuppression in mice
Davaasambuu T ; Oyunchimeg B ; Bayanmunkh A ; Sosorburam B ; Odchimeg B ; Badamtsetseg B ; Lkhagva L ; Khurelbaatar L
Mongolian Medical Sciences 2018;186(4):47-51
Background:
Herbal medicines continue to be widely used as natural promoters of good health, as immune-modulators
in recent years. This situation is directly related to the rapid growth of natural based products, the decrease of chemical synthesized products and as well as the increase of natural substance consumption.
Objective:
The purpose of this survey was to study influence of Immunos herbal medicines on immune system in the
experimental and preclinical circumstances.
Materials and Methods:
The immune deficiency was to created by Azathioprine through 5 days in the white mice after that control
group, preparation of Immunal, Salimon and Immunos 1, 2 were administrated appropriate doses by oral
during 10 days. Then we collected blood and quantified number of white blood cells (K/µL), quantity of
splenocyte (×106 cell/ml), amount of CD4+, CD8+ and IgM, IgA, Ig G (mg/ml) (Elisa Kit Assay: Catalog.
No: WAM-568 (Elisa Reader, 450 nm)-WKEA MED SUPPLIES CORP) on the 5th, 10th days.
Results:
All statistical analyses were conducted with SPSS version 20.0 software (IBM, Armonk, NY). One-way
ANOVA was used to assess statistical significance between Immunos groups and days of observation.
Mean values of white blood cells in blood, quantity of splenocyte, CD4+, CD8+ and IgM, IgG levels determined in the control and experimental groups. White blood cells level were significantly increased in the Immunos group compared with the control group by 55.6 percent (11.5±0.9 K/µL vs 5.1±0.51 K/µL, p<0.001) and number of splenocyte increased Immunos group compared with the control group by 60.6
% (352.2±23.5 ×106 cell/ml vs 138.6±23.5 ×106 cell/ml, p<0.01). Therefore, CD4+, CD8+ and IgM, IgG
levels were significantly increased in the Immunos group compared with the control group by 0.71 to
8.8% (IgG: 11.47±0.42 vs 10.45±0.43 μg/ml, IgM: 11.33±0.81 vs 10.48±0.31 μg/ml, CD4+: 10.44±0635
vs 10.04±0.372 U/ml, CD8+: 9.75±1.02 vs 9.68±0.45 U/ml p<0.02).
Conclusion
It’s concluded that, Immunos preparation shows immune-stimulator effect in cellular immunity and humoral immunity in the case of immunosuppressant by Azathioprine.
7.Comparison of Sysmex UF-5000 with urine culture for the diagnosis of urinary tract infections
Otgontungalag D ; Battulga M ; Bolortungalag B ; Munkhzaya D ; Bayanmunkh B ; Erkhembayar O ; Oyuntsetseg D ; Enkhjin B ; Bolor A
Health Laboratory 2020;12(2):5-10
Introduction:
Urinary tract infections (UTI) are at the second place in the frequency of all causes of infection after respiratory ones. The UTI requires appropriate antibiotic treatment. 85% of UTI predictive antibiotic treatment without confirmation by bacteriological analysis. This is one of the major causes of drug resistance, especially in K.coli. Urine bacteriological tests do not show bacterial culture in all cases where the number of bacteria in the urine exceeds the reference level. Therefore, there was a need to establish criteria for urine bacteriology test based on the results of urine sediment analysis.
In 20I7, a new fully automated Sysmex UF-5000 urine sediment analyzer was installed in the laboratory department of Medipas Hospital. The features of this analyzer include counting the number of bacteria in the urine, distinguishing between gram-positive and negative, homogeneous and mixed forms, and counting the formed elements in the urine. This feature made it possible to compare the number of bacteria and leukocytes in the urine with the results of urine bacteriology tests.
Goal:
Determine the relationship between the number of white blood cells and bacteria in the urine measured by the Sysmex UF-5000 urine sediment analyzer and the results of the urinary bacteriological test.
Objectives:
Compare the number of urine bacteriaand leukocyte measured by using the Sysmex UF-5000 urine sediment analyzer with the urine bacterial culture, and calculate the correlation.
Materials and methods:
The study is analytic cross-sectional study, analyzed the results of a total of 159 people who analyzed a urinalysis and urine bacteriological test at the Medipas Hospital Laboratory in 2017-2019 years.Urine samples were collected in a 100 ml, disposable sterile container in accordance with the instructions for taking urine midstream.Urine analysis was performed within 2 hours of sampling with a fully automatic urine sediment analyzer Sysmex UF-5000 Japan. Urine bacteriological analysis was performed on a lul sterile loop of urine specimens, inoculated into 5% blood agar from Hungary's BioLab, Sabouraud agar, and Chromogen agar from Biomerieux France, and incubated for 24 hours in an incubator at 37°C. Bacterial identification and antibiotic susceptibility tests were analyzed using the "Vitek-2" analyzer from the manufacturer Biomerieux France. Bacterial and leukocyte counts data measured by the Sysmex UF-5000 analyzer and urinary bacteriological analysis data were performed using SPSS23 software.
Results:
A total of 159 urine samples were tested for bacteriological analysis, of which 81 (50.9%) were bacteria over 105 CFU/ml or urine positive culture UTIs, 78 (49.1%) were nonsignificant bactcruria and urine negative culture.The average number of bacteria measured in the urine of 81 samples with urine positive culture above 105 CFU/ ml was 46491/ul (1168-100000 BACT/ul).
The average number of bacteria measured by the urine sediment analyzer of 78 samples with urine negative culture was 2645 BACT/ ul (2-57280 BACT/ul). To calculate more accurately estimate the average number of bacteria in 81 urine specimens with positive culture, the average number of bacteria in 17 (21%) samples was 4753 BACT/ul, measured in relatively low bacteria numbers of 1168-9450BACT/ul. The average leukocyte number in the urine of 81 samples with positive culture was 472.2 WBC/ul, and the average leukocyte number in the urine of 78 samples with negative culture was 87.7 WBC/ul.There is a strong correlation between the number of bacteria measured by the urine sediment analyzer and urine bacterial positive culture, which is 0.8 or statistically significant (p<0.001).The correlation coefficient of the number leukocytes measured by the urine sediment analyzer with in the urine positive cultureof bacteriological tests was 0.6 or moderately of statistically significant (p=0.005).There is a statistically significant relationship (p=0.001) between the number of bacteria in the bacterial positive culture population and the number of leukocytes.
Discussion:
Of the 81 cases of urine bacterial positive culture, 78 (96%) were female, indicating a high prevalence of UTI among women. According to the results of the Fabio Manon's study, the number of leukocytes in the urine is 160-340 WBC/uL and the number of bacteria is 15000-30000 BACT/u,L in the case of UTI, which is approximate results compared to the our study results.Based on the results of the urine sediment analysis, indications for a urine bacteriological test should be made.
Based on the results of urinary bacteriological tests, the choice of antibiotic treatment is the best treatment for urinary tract infections and a way to prevent of antibiotic resistance to UTI.
Conclusions
The number of bacteria measured by a Sysmex UF-5000 urine sediment analyzer is directly related to the bacterial culture urine bacteriological test. If the number of bacteria in the urine is measured above 4753 BACT/ul, it can be considered as an indication for urine bacteriological analysis. Although the number of leukocytes in the urine measured by the Sysmex UF-5000 urine analyzer is moderately correlated with bacterial culture in urine bactcriologucal tests, it is a key indicator of the degree of inflammation of the urinary tract.
8.Result of nephroprotective effect of aqueous extracts of Iris Tenuifolia Pall and Iris Lactea Pall
Sosorburam B ; Davaasambuu T ; Oyunchimeg B ; Bayanmunkh A ; Choijamts G ; Lkhagva L ; Khurelbaatar L
Mongolian Pharmacy and Pharmacology 2019;14(1):12-18
Background:
Iris Tenuifolia and Iris Lactea known for its various medicinal properties are
also a natural antichloristic and a kidney protective as agent.
Goal:
To evaluate the nephrite activity of aqueous extract of Iris Tenuifolia and Iris Lactea in
a rodent model of kanamycin induced nephrotoxicity.
Materials and Methods:
In the experimental design, thirty-six Wistar rats were randomly isolated into four groups of one control and three experimental. Nephrotoxicity in rats induced by intramuscular injection of Kanamycin {250 mg/kg) daily for 5 days5. The doses of 25 mg/kg, 50 mg/kg, 75 mg/kg, 100 mg/kg of aqueous extract of Iris Lactea and dose of 25 mg/kg Iris Tenuifolia Pall were administrated by oral gavages for 14 consecutive days in rats. At 14 days for the rest of them, serum samples were collected for renal function biochemical tests (Creatinine, Creatinine Clearance, Urea UV and GFR-Glomerulus Filtration Rate).
Results:
All statistical analyses were conducted with SPSS version 20.0 software (IBM,
Armork. NY). One-way ANOVA was used to assess statistical significance between experimental
groups and control group. Mean values of creatinine, creatinine clearance, urea UV and GFR levels
determined in the control and experimental groups. Kanamycin treatment caused nephrotoxicity
as evidenced by marked elevation in serum creatinine, creatinine clearance, GFR and urea UV,
Iris Tenuifolia 25 mg/kg blood serum creatinine (62.49±1.24 (38%), 56.38±1.41 (4.5% μmol/L), serum creatinine clearance (4.79±0.16 (45%), (5.80±0.36 (6%) ml/minute), serum GFR (191.6±6.58
(45%). (232±14.65 (5.9%) ml/minute), serum urea UV (8.64±0.63 (9.6%), (8.40±0.07 (20.23%), Iris
Lactea 75 mg/kg blood serum creatinine 68.92±4.08(31%), 58.87±1.95 (0.4% μmol/L), serum creatinine clearance (5.27±0.67(60%), (5.67±0.28(3.6%) ml/minute), serum GFR (210.9±26.78 (60%),
(226.8±11.28 (3.5%) ml/minute), serum urea UV (7.73±0.58 (19.14%), (7.48±0.35 (28.96%) respectively when compared to the control treated groups. Oral administration of Iris Lactea 75 mg/kg extract decreased the rise in these parameters in a dose dependent manner.
Conclusion
Our studies suggest that aqueous extract of Iris Lactea 75 mg/kg and Iris tenuifolia 25 mg/kg results are shown good effect for anti-inflammatory of renal.
9.Method validation of total iridoids in “Darmon” tablets by spectrophotometric method
Selbenchal B ; Sugarmaa B ; Odchimeg B ; Ganchimeg G ; Battulga B ; Badamtsetseg S ; Bayanmunkh A ; Tsetsegmaa S ; Lkhagva L ; Khurelbaatar L ; Lkhaasuren R
Mongolian Pharmacy and Pharmacology 2021;19(2):6-12
Introduction:
A joint research team of the Drug Research Institute аndMonos pharm Co.ltd is conducting an experiment to produce of “Darmon” tablets.Idridoids are one of the predominant biological active compound in “Darmon” tablets and will be an important indicator of the quality of the drug.
Objectives:
This is the first report on the determination of iridoids by spectrophotometric method in “Darmon” tablets.
Methods:
The amount of total iridoids of “Darmon” tablets was confirmed by spectrophotometry and the absorbance was measured at 238 nm. Geniposide (98%, Xilong Scientific Co., Ltd) was used as the standard substance.
Results:
The developed spectrophotometric method showed good linearity (R2=0.9989), high precision (RSD<2%) and a good recovery (96.01-104.48%). All the validation parameters of the spectrophotometric method were found to be within the permissible limits according to the ICH guidelines.
Conclusions
The method was robust, accurate and reliable for the quality control of “Darmon” tablets.
10.Method Validation of Dihydromyricetin in Anti-hangover preparation by High Performance Liquid Chromatography
Battulga B ; Badamtsetseg S ; Bayanmunkh A ; Tsetsegmaa S ; Lkhagva L ; Khurelbaatar L
Mongolian Medical Sciences 2019;189(3):54-61
Background:
The high performance liquid chromatography (HPLC) method was developed for selective determination
of dihydromyricetin in capsule formulation dietary supplement containing other components. Further, the
proposed method was validated for linearity, precision (system precision, method precision, intermediate
or inter-day precision), and accuracy, stability in analytical solution, system suitability and ruggedness.
The developed method exhibited the best results in terms of the aforesaid validation parameters. The
other components and additives did not interfere in their determinations. The method was found to be
selective, simple, economical, accurate, reproducible, rapid and reliable for routine estimation purpose of
dihydromyricetin in dietary supplement capsule.
Goal :
The goal of this study was to develop the validation method of dihydromyricetin in the dietary supplement.
Material and Methods :
The hangover preparation was produced by Technological section of Drug Research Institute. The
standard dihydromyricetin was supplied from Sigma Aldrich Co. We used solvents for HPLC grade
(methanol, acetonitrile). Chromatographic conditions: A gradient HPLC (Shimadzu LC20AD) with serial
dual plunger pump; analytical column: Supelco inertsil С18 250 × 4.6 mm, particle size 5 μm; flow rate: 1
ml/min; column temperature: 350C, detection: UV 365 nm. Chromatographic procedure: 20 μl of the mixed standard preparation and assay (sample) preparation were separately injected into the chromatography, the chromatograms were recorded, and the responses for the major peaks were measured. The run time
was approximately 10 minutes.
Results
The calibration curves for dihydromyricetin were made by plotting the peak area versus the concentration for each analyte using regression analysis. Each calibration curve was obtained using six levels of concentrations in the range 28-224 µg/mL. The linear correlation coefficient (r2 ) for all calibration curves was higher than 0.999 for all analytes. The LOD and LOQ for dihydromyricetin were in 11.29 µg/mL and 34.21 µg/mL, respectively. Accuracy and precision were assessed by analyzing five sets of samples, independently prepared at low, middle and high concentrations. The RSD values of both repeatability and intermediate precision were below 0.261% and 0.262%. The accuracy remaining between 101.65 to 104.7%. The resulting accuracy data were satisfactory for the quantitative analysis of dihydromyricetin in anti-hangover preparation. The results of summarized in Table 1, 2, 3. This article presents a simple, accurate, reproducible, and thoroughly validated HPLC-based method for qualitative and quantitative analysis of dihydromyricetin, as part of the quality assessment of products containing anti-hangover preparation.