1.Analysis of Phenolic Acid Content and Antioxidant Activity of Chestnut Honey from Different Regions of Korea
Juree KIM ; Neil Patrick UY ; Doyun KIM ; Sanghyun LEE
Natural Product Sciences 2023;29(3):127-131
Chestnut honey contains various components such as phenolic compounds and alkaloids that exhibit antioxidant and anti-inflammatory activities. However, the composition and activity of chestnut honey significantly differ depending on its region of origin. In this study, the antioxidant activity of chestnut honey obtained from nine regions in Korea was evaluated by ABTS free radical scavenging assay. In addition, the phenolic acid content of each honey sample was analyzed using high-performance liquid chromatography (HPLC) and an ultraviolet (UV) detector. The antioxidant activity increased with the increasing concentration of chestnut honey samples. The major phenolic compounds in chestnut honey were observed to be gallic, p-coumaric, and ferulic acid. Altogether, the quantitative analysis of phenolic acids and evaluation of antioxidant activity in chestnut honey from different regions will contribute to establishing regional chestnut honey profiling in Korea and may provide preliminary data for collecting honey with various biological activities.
2.Fate and toxicity of spilled chemicals in groundwater and soil environment I: strong acids
Doyun SHIN ; Youngyeon KIM ; Hee Sun MOON
Environmental Health and Toxicology 2018;33(4):2018019-
We reviewed the chemical/physical properties, toxicity, environmental fate, and ecotoxicity of strong acids in soil and groundwater environments. We recommend that sulfuric acid and hydrofluoric acid be classified as chemicals of priority control based on volumes used, toxicity, carcinogenicity, and past significant spill events. Understanding the behavior and transport of spilled strong acids in soil and groundwater environments requires a multi-disciplinary approach, as they can undergo a variety of geochemical and biochemical reactions with complex geomedia. The toxicity of spilled acid is dependent on the characteristics of the geomedia exposed to the acid and the amount of residual protons following acid–substrate interaction. Soil texture, cation exchange capacity, mineral composition, bedrock type, and aluminum content may be important factors affecting the toxicity of spilled acid in soil-groundwater environments. We expect that the results of this study will contribute preliminary data for future research on chemical spills.
Aluminum
;
Groundwater
;
Hydrofluoric Acid
;
Miners
;
Protons
;
Soil
;
Sulfur
3.Fate and toxicity of spilled chemicals in groundwater and soil environment I: strong acids.
Doyun SHIN ; Youngyeon KIM ; Hee Sun MOON
Environmental Health and Toxicology 2018;33(4):e2018019-
We reviewed the chemical/physical properties, toxicity, environmental fate, and ecotoxicity of strong acids in soil and groundwater environments. We recommend that sulfuric acid and hydrofluoric acid be classified as chemicals of priority control based on volumes used, toxicity, carcinogenicity, and past significant spill events. Understanding the behavior and transport of spilled strong acids in soil and groundwater environments requires a multi-disciplinary approach, as they can undergo a variety of geochemical and biochemical reactions with complex geomedia. The toxicity of spilled acid is dependent on the characteristics of the geomedia exposed to the acid and the amount of residual protons following acid–substrate interaction. Soil texture, cation exchange capacity, mineral composition, bedrock type, and aluminum content may be important factors affecting the toxicity of spilled acid in soil-groundwater environments. We expect that the results of this study will contribute preliminary data for future research on chemical spills.
Aluminum
;
Groundwater*
;
Hydrofluoric Acid
;
Miners
;
Protons
;
Soil*
;
Sulfur
4.Cognitive Impairment Screening Test in Korea as a Screening Tool for Dementia: The Correlation Study of Subtest Scores With Korean Version of the Mini Mental State Examination 2nd Edition
Minseong KIM ; Doyun HEO ; Seonkyeong KIM ; Yunjin LEE ; Yong Sung KIM ; Wonjae SUNG ; Hee-Jin KIM
Dementia and Neurocognitive Disorders 2025;24(2):126-134
Background:
and Purpose: The Cognitive Impairment Screening Test in Korea (CIST-K) was designed to detect cognitive decline. Developed independently and widely used in Korea, it is yet to be validated with other screening tests. This study aimed to introduce normative data to the CIST-K and assess its clinical usefulness through correlation analysis with the Korean version of the Mini-Mental State Examination, 2nd edition (K-MMSE-2).
Methods:
We enrolled 85 participants from a tertiary university hospital in Korea, including patients diagnosed with mild cognitive impairment and Alzheimer’s disease by experienced neurologists. Both the CIST-K and K-MMSE-2 were administered to assess the cognitive function of the participants, with scores from each subtest of the neuropsychological tests compared.
Results:
Multivariate correlation analysis, which was adjusted for age, sex, and education level, revealed a significant correlation between the two tests in orientation, memory, and attention. However, no significant correlation was found between the two tests in visuospatial and language functions.
Conclusions
In conclusion, this study demonstrates that some subtests in the CIST-K align with corresponding scores on the K-MMSE-2. However, caution is advised when interpreting visuospatial and language test scores from the CIST-K. Further validity studies are necessary to enhance the sensitivity of each subtest.
5.Cognitive Impairment Screening Test in Korea as a Screening Tool for Dementia: The Correlation Study of Subtest Scores With Korean Version of the Mini Mental State Examination 2nd Edition
Minseong KIM ; Doyun HEO ; Seonkyeong KIM ; Yunjin LEE ; Yong Sung KIM ; Wonjae SUNG ; Hee-Jin KIM
Dementia and Neurocognitive Disorders 2025;24(2):126-134
Background:
and Purpose: The Cognitive Impairment Screening Test in Korea (CIST-K) was designed to detect cognitive decline. Developed independently and widely used in Korea, it is yet to be validated with other screening tests. This study aimed to introduce normative data to the CIST-K and assess its clinical usefulness through correlation analysis with the Korean version of the Mini-Mental State Examination, 2nd edition (K-MMSE-2).
Methods:
We enrolled 85 participants from a tertiary university hospital in Korea, including patients diagnosed with mild cognitive impairment and Alzheimer’s disease by experienced neurologists. Both the CIST-K and K-MMSE-2 were administered to assess the cognitive function of the participants, with scores from each subtest of the neuropsychological tests compared.
Results:
Multivariate correlation analysis, which was adjusted for age, sex, and education level, revealed a significant correlation between the two tests in orientation, memory, and attention. However, no significant correlation was found between the two tests in visuospatial and language functions.
Conclusions
In conclusion, this study demonstrates that some subtests in the CIST-K align with corresponding scores on the K-MMSE-2. However, caution is advised when interpreting visuospatial and language test scores from the CIST-K. Further validity studies are necessary to enhance the sensitivity of each subtest.
6.Cognitive Impairment Screening Test in Korea as a Screening Tool for Dementia: The Correlation Study of Subtest Scores With Korean Version of the Mini Mental State Examination 2nd Edition
Minseong KIM ; Doyun HEO ; Seonkyeong KIM ; Yunjin LEE ; Yong Sung KIM ; Wonjae SUNG ; Hee-Jin KIM
Dementia and Neurocognitive Disorders 2025;24(2):126-134
Background:
and Purpose: The Cognitive Impairment Screening Test in Korea (CIST-K) was designed to detect cognitive decline. Developed independently and widely used in Korea, it is yet to be validated with other screening tests. This study aimed to introduce normative data to the CIST-K and assess its clinical usefulness through correlation analysis with the Korean version of the Mini-Mental State Examination, 2nd edition (K-MMSE-2).
Methods:
We enrolled 85 participants from a tertiary university hospital in Korea, including patients diagnosed with mild cognitive impairment and Alzheimer’s disease by experienced neurologists. Both the CIST-K and K-MMSE-2 were administered to assess the cognitive function of the participants, with scores from each subtest of the neuropsychological tests compared.
Results:
Multivariate correlation analysis, which was adjusted for age, sex, and education level, revealed a significant correlation between the two tests in orientation, memory, and attention. However, no significant correlation was found between the two tests in visuospatial and language functions.
Conclusions
In conclusion, this study demonstrates that some subtests in the CIST-K align with corresponding scores on the K-MMSE-2. However, caution is advised when interpreting visuospatial and language test scores from the CIST-K. Further validity studies are necessary to enhance the sensitivity of each subtest.
7.Cognitive Impairment Screening Test in Korea as a Screening Tool for Dementia: The Correlation Study of Subtest Scores With Korean Version of the Mini Mental State Examination 2nd Edition
Minseong KIM ; Doyun HEO ; Seonkyeong KIM ; Yunjin LEE ; Yong Sung KIM ; Wonjae SUNG ; Hee-Jin KIM
Dementia and Neurocognitive Disorders 2025;24(2):126-134
Background:
and Purpose: The Cognitive Impairment Screening Test in Korea (CIST-K) was designed to detect cognitive decline. Developed independently and widely used in Korea, it is yet to be validated with other screening tests. This study aimed to introduce normative data to the CIST-K and assess its clinical usefulness through correlation analysis with the Korean version of the Mini-Mental State Examination, 2nd edition (K-MMSE-2).
Methods:
We enrolled 85 participants from a tertiary university hospital in Korea, including patients diagnosed with mild cognitive impairment and Alzheimer’s disease by experienced neurologists. Both the CIST-K and K-MMSE-2 were administered to assess the cognitive function of the participants, with scores from each subtest of the neuropsychological tests compared.
Results:
Multivariate correlation analysis, which was adjusted for age, sex, and education level, revealed a significant correlation between the two tests in orientation, memory, and attention. However, no significant correlation was found between the two tests in visuospatial and language functions.
Conclusions
In conclusion, this study demonstrates that some subtests in the CIST-K align with corresponding scores on the K-MMSE-2. However, caution is advised when interpreting visuospatial and language test scores from the CIST-K. Further validity studies are necessary to enhance the sensitivity of each subtest.
8.Successful long-term management of late-stage precursor-targeted immune-mediated anemia with prednisolone and mycophenolate mofetil in a dog
Doyun KIM ; Woo-Jin SONG ; Sung-Soo KIM ; Soyoung JEONG ; Hyun Jeong HONG ; Youngmin YUN
Korean Journal of Veterinary Research 2023;63(2):e8-
A 13-year-old neutered male Maltese dog presented to our hospital with lethargy and anorexia. Laboratory abnormalities included severe non-regenerative anemia (hematocrit, 12.9%; reticulocyte count 12.8 K/μL). The cytology of bone marrow revealed erythroid hypercellularity with mild myelofibrosis. Therefore, late-stage precursor-targeted immune-mediated anemia (PIMA) was diagnosed. Multimodal treatment including 2 immunosuppressant drugs (prednisolone and mycophenolate mofetil), antithrombic drug (clopidogrel), and blood transfusion was performed. The dog showed complete remission from PIMA, and the total duration of follow-up was 622 days. This is the first case report of canine PIMA managed successfully with prednisolone and mycophenolate mofetil in Korea.
9.A Critical Involvement of Glutamatergic Neurons in the Anterior Insular Cortex for Subdiaphragmatic Vagotomy-induced Analgesia
Yea Jin KIM ; Grace J LEE ; Sang Wook SHIM ; Doyun KIM ; Seog Bae OH
Experimental Neurobiology 2023;32(2):68-82
Subdiaphragmatic vagotomy (SDV) is known to produce analgesic effect in various pain conditions including not only visceral pain but also somatic pain. We aimed to determine brain mechanisms by which SDV induces analgesic effect in somatic pain condition by using formalin-induced acute inflammatory pain model. We identified brain regions that mediate SDV-induced analgesic effect on acute inflammatory pain by analyzing cFos expression in the whole brain. We found that c-Fos expression was specifically increased in the anterior insular cortex (aIC) among subregions of the insular cortex in acute inflammatory pain, which was reversed by SDV. These results were not mimicked in female mice, indicating sexualdimorphism in SDV-induced analgesia. SDV decreased c-Fos expressions more preferentially in glutamatergic neurons rather than GABAergic neurons in the aIC, and pharmacological activation of glutamatergic neurons with NMDA in the aIC inhibited SDV-induced analgesic effect. Furthermore, chemogenetic activation of glutamatergic neurons in the aIC reversed SDV-induced analgesia. Taken together, our results suggest that the decrease in the neuronal activity of glutamatergic neurons in the aIC mediates SDV-induced analgesic effect, potentially serving as an important therapeutic target to treat inflammatory pain.
10.Use of triazolam and alprazolam as premedication for general anesthesia.
Doyun KIM ; Seongheon LEE ; Taehee PYEON ; Seongwook JEONG
Korean Journal of Anesthesiology 2015;68(4):346-351
BACKGROUND: Triazolam has similar pharmacological properties as other benzodiazepines and is generally used as a sedative to treat insomnia. Alprazolam represents a possible alternative to midazolam for the premedication of surgical patients. The purpose of this study was to evaluate the anxiolytic, sedative, and amnestic properties of triazolam and alprazolam as pre-anesthetic medications. METHODS: Sixty adult patients were randomly allocated to receive oral triazolam 0.25 mg or alprazolam 0.5 mg one hour prior to surgery. A structured assessment interview was performed in the operating room (OR), the recovery room, and the ward. The levels of anxiety and sedation were assessed on a 7-point scale (0 = relaxation to 6 = very severe anxiety) and a 5-point scale (0 = alert to 4 = lack of responsiveness), respectively. The psychomotor performance was estimated using a digit symbol substitution test. As a memory test, we asked the patients the day after the surgery if they remembered being moved from the ward to the OR, and what object we had shown them in the OR. RESULTS: There were no significant differences between the groups with respect to anxiety and sedation. The postoperative interviews showed that 22.2% of the triazolam-treated patients experienced a loss of memory in the OR, against a 0% memory loss in the alprazolam-treated patients. In comparison with alprazolam 0.5 mg, triazolam 0.25 mg produced a higher incidence of amnesia without causing respiratory depression. CONCLUSIONS: Oral triazolam 0.25 mg can be an effective preanesthetic medication for psychomotor performance.
Adult
;
Alprazolam*
;
Amnesia
;
Anesthesia, General*
;
Anxiety
;
Benzodiazepines
;
Humans
;
Incidence
;
Memory
;
Memory Disorders
;
Midazolam
;
Operating Rooms
;
Preanesthetic Medication
;
Premedication*
;
Psychomotor Performance
;
Recovery Room
;
Relaxation
;
Respiratory Insufficiency
;
Sleep Initiation and Maintenance Disorders
;
Triazolam*