Effects of Handover Education Using the Outcome-Present State Test (OPT) Model and SBAR in Nursing Students: A Quasi-Experimental Design

Background

Since most of nursing students lack clinical reasoning competency, for effective handover education, it is necessary to include a strategy to improve the clinical reasoning competency in the practical training course of the nursing department.

Methods

This study used a quasi-experimental research design using a non-equivalent control group pretestposttest design to verify the effectiveness of the practice education program using the OPT model and SBAR. The subjects were 73 third-year students participating in clinical practice or clinical alternative practice in Korea.

Results

The experimental group showed significantly better communication clarity (t=-12.262, P<.001), communication confidence (t=-12.486, P<.001), problem-solving processes (t=-13.100, P<.001), and team efficacy (t=-6.197, P<.001) compared to before the intervention. However, there was no significant difference between the pre- and post-intervention scores of the control group.

Conclusion

In a situation where clinical practice is difficult for nursing students, the handover education program using the OPT model and SBAR can helps improve their communication clarity, communication confidence, problem-solving process, and team efficacy.

Health-related quality of life in older women with injuries: a nationwide study

Objectives

This study aims to describe the health-related quality of life (HRQoL) and influencing factors of older women who experienced injuries.

Methods

This study is a secondary analysis of data from 4,217 women aged 65 years or older sampled from the Korea National Health and Nutrition Examination Survey (KNHANES) (2016-2020) database. Two-way analysis of variance was used to analyze the data.

Results

The mean HRQoL scores of older women with and without injuries were 0.81 ± 0.19 (n = 328) and 0.85 ± 0.17 (n = 3,889), respectively, which were significantly different (p < 0.001). The results of multiple regression analysis revealed that working, physical activity, BMI, osteoarthritis, stress, and subjective health status significantly affected the HRQoL of older women with injuries, and the explanatory power of the model was 29%.

Conclusion

The results of this study on factors affecting HRQoL can contribute to the understanding of the experience of older women with injuries and can be used as a reference to develop health promotion programs.

Nursing students' intent to use AI-based healthcare technology: Path analysis using the unified theory of acceptance and use of technology

BACKGROUND

Marked advances in artificial intelligence (AI)-based technologies throughout industries, including healthcare, necessitate a broader understanding their use. Particularly, intent to use AI-based healthcare technologies and its predictors among nursing students, who are prospective healthcare professionals, is required to promote the utilization of AI.

OBJECTIVE

This study conducted a path analysis to predict nursing students' intent to use AI-based healthcare technologies based on the unified theory of acceptance and use of technology.

DESIGN

A cross-sectional survey was performed.

PARTICIPANTS

The participants were 210 nursing students from two nursing schools in Korea.

METHODS

This study established hypothetical paths for the influence of performance expectancy, effort expectancy, social influence, facilitating conditions, self-efficacy, and anxiety on intent to use AI-based technologies. Mediation of positive and negative attitudes and facilitating conditions' direct effects on intent to use were examined.

RESULTS

Positive attitude toward AI (β = 0.485, p = .009) and facilitating conditions (β = 0.117, p = .045) predicted intent to use, whereas the path from negative attitude to intent to use was not significant. Performance expectancy, self-efficacy, and effort expectancy predicted positive attitude. Performance expectancy and self-efficacy had a negative effect on the path to negative attitude, whereas anxiety had a positive effect. Facilitating conditions did not significantly predict positive or negative attitude and only directly predicted intent to use. Social influence did not have a significant effect on intent to use.

CONCLUSIONS

Intervention programs and other measures should be developed to provide education and information to boost performance expectancy, effort expectancy, facilitating conditions, and self-efficacy regarding the use of AI to lower anxiety and foster positive attitude toward AI-based health technologies.

Factors associated with self-care behavior in patients with pre-dialysis or dialysis-dependent chronic kidney disease

Self-care behavior plays a pivotal role in the management of chronic kidney disease. Improved self-care behavior in patients with chronic kidney disease is a key factor in health management and treatment adherence. This study aimed to evaluate the participants’ general and medical condition-related characteristics, physiological indices and the level of health literacy affecting self-care behavior in patients with chronic kidney disease in South Korea. The data of 278 participants were analyzed using t-test, analysis of variance, correlation coefficient, and linear multiple regression analysis. There were significant differences in self-care behavior scores depending on participants’ age and cohabitation status, employment, and smoking status as well as having dialysis due to end-stage kidney disease; number of comorbidities; levels of serum hemoglobin, calcium, and creatinine; and estimated glomerular filtration rate. The results of regression analysis revealed that not currently working, non-smoker, end-stage kidney disease, and positive response to the “actively managing my health” scale of the Health Literacy Questionnaire significantly affected self-care behavior in patients with chronic kidney disease, and the explanatory power of the model was 32.7%. Therefore, it is necessary to identify each patient’s barriers or needs according to individual characteristics, such as age, cohabitation and employment status, and daily life circumstances, including smoking habits, comorbidities, social support, and level of health literacy to develop efficient support strategies for promoting adequate self-care behavior with CKD.

Influence of AI ethics awareness, attitude, anxiety, and self-efficacy on nursing students' behavioral intentions

Background

Artificial intelligence (AI) technology has recently seen rapid advancement, with an expanding role and scope in nursing education and healthcare. This study identifies the influence of AI ethics awareness, attitude toward AI, anxiety, and self-efficacy on nursing students’ behavioral intentions to use AI-based healthcare technology.

Methods

The participants included 189 nursing students in Gyeonggi-do, with data collected from November to December 2021 using self-reported questionnaires. We analyzed the data using the SPSS/WIN 26.0 program, including a t-test, Pearson’s correlation coefficient, and hierarchical multiple linear regression.

Results

The results revealed that AI ethical awareness (t = − 4.32, p < .001), positive attitude toward AI (t = − 2.60, p = .010), and self-efficacy (t = − 2.65, p = .009) scores of the third and fourth-year nursing students were higher, while their anxiety scores were lower (t = 2.30, p = .022) compared to the scores of the first and second-year nursing students. The factors influencing behavioral intention included a positive attitude toward AI (β = 0.58) and self-efficacy (β = 0.22). The adjusted R² was 0.42.

Conclusion

It is necessary to inculcate a positive attitude toward AI and self-efficacy by providing educational programs on AI-based technology in healthcare settings.

Health Risk Behaviors Affecting Internet Usage in Adolescents: Evidence from the 2018 Korea Youth Risk Behavior Web-Based Survey

Background: The purpose of this cross-sectional study was to assess the effects of health risk behaviors on the daily Internet usage of Korean high school students. Methods: The data of 19,830 high school students who responded to the Korea Youth Risk Behavior Web-based Survey were analyzed from June to July 2018. Results: The mean daily Internet usage of high school students was 193.3±125.7 minutes. There were differences in daily Internet usage according to body mass index, grade level, school type, academic achievement, economic status, physical activity, number of physical education classes attended, safety accidents, and safety education (p<.05). Daily Internet usage also differed according to health risk behaviors, including smoking (t=8.32), alcohol consumption (t=9.36), drug use (t=4.51), and risky sexual behaviors (t=5.94). The daily Internet usage of students significantly increased in the absence of physical activity and with health risk behaviors such as smoking, alcohol consumption, drug use, and risky sexual behaviors. Conclusion: It is necessary to develop an intervention program and provide education on increasing physical activity and reducing health risk behaviors for the proper management of health and Internet usage in adolescents.

Impact of Internet usage time on mental health in adolescents: Using the 14th Korea Youth Risk Behavior Web-Based Survey 2018

Dependency on the Internet in daily life is increasing, and the negative consequences this dependence may have on mental health are not sufficiently understood. The aim of this study was to investigate the relationship between Korean adolescents' Internet usage time and their mental health. This cross-sectional study included 29,811 high school students ages 16-18 from the 2018 Korea Youth Risk Behavior Web-Based Survey. Participants' mean Internet usage time was 193.4±1.6 min/day. Internet usage time was associated with sex, grade level, type of school, living arrangement, economic status, academic achievement, and experience of school violence. With regard to mental health, subjective health status, stress, feelings of sadness, and suicidal ideation were also related to Internet usage time. The group with more than average Internet usage had poorer subjective health, higher level of stress, and had feelings of sadness and suicidal ideation compared to the group with less than average Internet usage. To effectively manage Internet usage time, interventions to lower Internet usage and leisure programs that could replace Internet usage need to be developed.

Effects of a sociodrama-based communication enhancement program on mothers of children with neurodevelopmental disorders: a pilot study

PURPOSE

The incidence and prevalence of neurodevelopmental disorders have rapidly increased, indicating an urgent need for assistance through parenting interventions. This study aimed to evaluate the effects of a sociodrama-based communication enhancement program on mothers of children with neurodevelopmental disorders.

METHOD

A non-randomized controlled experimental study design was employed. The experimental and control groups had 16 and 18 participants, respectively. The once-a-week six-session intervention was conducted from September to November, 2017, in South Korea. The effects of group, time, and group-by-time interactions among the groups were verified using generalized estimating equations with an autoregressive correlation structure.

RESULTS

There was a significant decrease in the parenting burden, alongside a significant improvement in parent-child communication and parenting competence in the experimental group compared to the control group.

CONCLUSION

The sociodrama-based communication enhancement program was found to positively influence the parenting burden, communication, and parenting competence of mothers of children with neurodevelopmental disorders. These findings suggest that sociodrama-based programs may be an effective intervention strategy for parents of children with neurodevelopmental disorders. The sociodrama-based communication enhancement program can be applied to decrease parenting burden and improve parent-child communication and parenting competence. Through continuous parenting interventions, an improvement in expressive language and an increase in the attachment behaviors of children with neurodevelopmental disabilities could be expected.

Development and validation of the Scale for Staff-Family Partnership in Long-term Care (SSFPLC)

Background

A partnership between staff and families is crucial to maintain nursing home residents' health and promote quality of care, and currently, there is a need for a measurement tool to assess the partnership.

Objectives

This study aimed to develop a tool for assessing the partnership between staff and the families of older adult nursing home residents from the perspective of staff members and to verify its reliability and validity.

Methods

The instrument was developed in the following four stages: (1) generation of an item pool via literature review and focus group interview, (2) experts' content validity analysis of 32 items, (3) a preliminary survey on 30 staff members and (4) validity and reliability tests of the instrument on 346 staff members in nursing homes between July and October 2018.

Results

The final instrument consists of 17‐items in four categories (family's trust and support, collaborative relationship and communication, encouragement to participate in care and professional care). Each item was rated on a 4‐point Likert scale, and the higher scores indicating better partnership between staff and families of nursing home residents. The reliability of the instrument was 0.90, and the test–retest intra‐class correlation coefficient was 0.96.

Conclusion

The Scale for Staff–Family Partnership in Long‐term Care (SSFPLC) showed acceptable reliability and validity as an instrument to assess the partnership between nursing home staff and families.

Implications for practice

This tool can be used for evaluating staff and family partnerships within nursing homes.

A therapeutic intervention for Alzheimer's disease using ginsenoside Rg3: its role in M2 microglial activation and non-amyloidogenesis

Previously, we have reported that ginsenoside Rg3 has typical activities for neuroprotection and Aβ42 clearance by modulating microglia. In this study, we determined the pivotal role of ginsenoside Rg3 in microglia and neuronal cells. In human microglia, Rg3 and its stereoisomers significantly restored inflammatory M1 to normal M0 state and promoted M2 activation by up-regulating acute cytokines such as interleukin-10 and Arginase 1. Moreover, scavenger receptor type A (SRA) was significantly elevated in the presence of ginsenoside Rg3 and 20(S)-Rg3. This indicated that ginsenoside Rg3 could play a crucial role in Aβ uptake and clearance under activated M2 state. We also observed that soluble amyloid precursor protein-alpha (sAPPα) and ADAM10 levels were increased in APP swe-transfected Nuro-2a neuronal cells, whereas sAPPβ was not processed, suggesting that ginsenoside Rg3 was involved in non-amyloidogenic processing. In immunocytochemistry, SRA and a disintegrin and metalloproteinase 10 (desintegrin and metalloproteinase-containing protein 10, ADAM10) were coincidently upregulated in the presence of ginsenoside Rg3 and its stereoisomers compared to those in normal control. Taken together, these results suggested that ginsenoside Rg3 could boost acute activation of microglia, promote Aβ uptake, and elevate the sAPPα processing under activated M2 state. Although in vivo studies need to be performed, it is certain that ginsenoside Rg3 is highly involved in ameliorating the pathogenesis of neurodegeneration and can be a promising candidate for treating Alzheimer's disease as a new therapeutic intervention.

Model Setting and Interpretation of Results in Research Using Structural Equation Modeling: A Checklist with Guiding Questions for Reporting

PURPOSE

This study develops a checklist with guidelines for the methods and important factors to consider in research using structural equation modeling (SEM).

METHOD

The paper discusses the factors to consider in the process across the three stages of 1) model setting, 2) model evaluation and modification, and 3) interpretation and reporting of SEM-based studies.

RESULTS

The authors present a checklist for researchers during the stages of model setting, model evaluation and modification, result analysis, and reporting, along with examples of figures and tables with explanations.

CONCLUSION

A checklist will help to improve the reporting quality of SEM-based studies.

Critical care nurses' communication challenges during handovers: A systematic review and qualitative meta-synthesis

AIMS

To review and synthesize qualitative studies to gain a deeper understanding of critical care nurses' inter-departmental and shift-to-shift handover challenges.

BACKGROUND

Good-quality nurse-to-nurse handover promotes patient safety, while poor handover has been associated with medical errors. However, systematic reviews of qualitative approaches for better understanding the handover experiences of critical care nurses are lacking.

EVALUATION

Systematic review methods incorporating meta-synthesis were used. A comprehensive search of seven databases was conducted. Two independent reviewers performed data extraction and evaluated ten studies using the Critical Appraisal Screening Program. Findings were analysed and synthesized using thematic analysis. The transactional model of communication was used to guide the analysis.

KEY ISSUES

A total of 10 qualitative studies were included. Seven major handover themes were identified: (a) expectations of perfection, (b) need for partnership, (c) unilateral communication, (d) obstacles to information acquisition, (e) lack of pertinent patient information, (f) need for a structured handover and (g) interruptions/distractions.

CONCLUSIONS

Handovers should be considered an essential part of patient-centred care for ensuring continuity of care.

IMPLICATIONS FOR NURSING MANAGEMENT

Poor communication during a handover could increase the nurse's burden or stress and adversely affect patient care. Therefore, training should be provided on explicit handover communication.

Association between Hospital Nurses' Perception of Patient Safety Management and Standard Precaution Adherence: A Cross-Sectional Study

Standard precautions should be applied to prevent health care-associated infections during every nursing activity. However, adherence to standard precautions was reported to be inadequate. Therefore, this study aimed to identify the rates of standard precaution adherence and the association between perception of patient safety management and standard precaution adherence. In this cross-sectional descriptive study, a convenience sample of nurses was recruited from a university-affiliated teaching hospital in Seoul, Korea. Data were collected using a structured self-report questionnaire. Among the 332 questionnaires returned (response rate: 94.9%), a total of 329 nurses were analyzed. In the present study, the overall standard precaution adherence rate was approximately 53.5%. The multiple linear regression results revealed that participants’ perceptions of patient safety management were only significantly associated with standard precaution adherence after adjusting other covariates (β = 0.412, p < 0.001). Nurse supervisors should focus more on raising awareness about nurses’ perception of patient safety management based on the specific work environment, such as the total number of nurses working together and the nurse-to-patient ratio. Nurse educators should develop integrated curricula to help graduate nurses transition smoothly into professional practice and enhance adherence to standard precautions in diverse health care settings.

Factors Affecting Body Image Discordance Amongst Korean Adults Aged 19-39 Years

Objectives

This study was designed to investigate factors affecting the discordance between body image and body mass index amongst Korean adults aged 19–39 years.

Methods

Data (N = 59,361) from the 2014 Korean Community Health Survey was analyzed using descriptive analysis, chi-square test, and logistic regression analysis.

Results

To examine the factors affecting body image discordance as observed in 43.1% of participants, the group was subdivided into underestimation and overestimation. There were 36.0% of participants that were body image discordant underestimators and 7.1% were overestimators. Multivariate logistic regression analysis showed that the underestimators tended to be men, graduated from high school, married, current/ex-smokers, ex-drinkers, had between 5 to 9 hours sleep (inclusive), had fair to good self-rated health, and demonstrated healthy weight control behavior, relative to the reference group. In comparison, overestimators tended to be in the 19–29 year group and had signs of depression. The OR of individuals who were men, married, and had healthy weight control behavior was significantly lower in the overestimators group.

Conclusion

These findings show that tailored interventions to promote accurate body awareness should be based on the type of body image discordance. In addition, it is necessary to develop and implement a program of body image improvement that considers the factors affecting body weight discordance.

Chemical and genetic diversity of high-seed-yield sorghum (Sorghum bicolor M.) germplasms

This study evaluated the chemical and genetic diversity of high-seed-yield sorghum germplasms from Korea, the United States, and South Africa. We identified significant differences in the chemical contents of whole plants at the heading stage in all cultivars, including differences in crude protein, fat, fiber, ash, neutral detergent fiber, acid detergent fiber, mineral, and fatty acid contents. Our results suggest that Banwoldang is the most appropriate cultivar for roughage because of its high protein yield. We identified significant differences in the tannin, flavonoid, amylose, mineral, crude fat, fatty acid, and 3-deoxyanthocyanin contents in the whole grain from all cultivars, but not in the mineral or crude fat contents. Tannin levels were generally low. IS645 contained the highest levels of flavonoids and linolenic acid compounds, and Moktak had the highest amylose and deoxyanthocyanidin content in the grain. To assess genetic diversity, we used 10 simple sequence repeat (SSR) primer sets to identify 38 alleles with 3-8 alleles per locus. Based on phylogenetic analysis of the SSR markers, the sorghum cultivars were divided into three major groups. Comparison of clusters based on chemical compositions with those based on SSRs showed that the groups formed by the three native Korean cultivars clustered similarly in molecular dendrograms. Association analysis was conducted for the 10 SSR marker; 48 chemical and growth traits were present for two marker traits (seed color and whole plant fatty acid content) with significant marker-trait associations. These markers could be used to select sorghum cultivars for breeding programs.

Clinical assessment of rosacea severity: oriental score vs. quantitative assessment method with imaging and biomedical tools

BACKGROUND

Rosacea is a common chronic inflammatory disorder affecting facial skin. Currently, no accurate and objective method is available for assessing the severity of rosacea. Most studies use the National Rosacea Society Standard (NRSS) grading method, which lacks objectivity and yields varying results.

METHODS

Eighteen patients with rosacea were included. Clinical severity was assessed on the basis of the NRSS grade, Investigators' Global Assessment, Patients' Global Assessment, and Dermatology Quality of Life Index. A skin color analysis system was used to measure the facial area showing erythema, and biophysical parameters of facial skin (transepidermal water loss and skin surface hydration) were examined. To find statistical significant in classification severity of the rosacea, statistical analysis was performed with all parameters.

RESULTS

A significant correlation (P < 0.05) was found between the NRSS grade, facial area showing erythema, and biophysical parameters. The latter two factors differed significantly among patients with rosacea of different levels of severity (mild, moderate, severe; P < 0.05).

CONCLUSION

Color imaging systems can be useful and reliable for evaluating the severity of rosacea, in addition to biophysical parameter assessment. The combination of these two analytical methods enabled objective and quantitative evaluation of the severity of rosacea.

Cost Effectiveness of Using Array-CGH for Diagnosing Learning Disability

OBJECTIVE

To undertake a cost-effectiveness analysis of using microarray comparative genomic hybridisation (array-CGH) as a first-line test versus as a second-line test for the diagnosis of causal chromosomal abnormalities in patients referred to a NHS clinical genetics service in the U.K. with idiopathic learning disability, developmental delay and/or congenital anomalies.

METHODS

A cost-effectiveness study was conducted. The perspective is that of a U.K. NHS clinical genetics service provider (with respect to both costs and outcomes). A cohort of patients (n = 1590) referred for array-CGH testing of undiagnosed learning disability and developmental delay by a single NHS regional clinical genetics service (South East Thames Regional Genetics Service), were split into a before-and-after design where 742 patients had array-CGH as a second-line test (before group-comparator intervention) and 848 patients had array-CGH as a first-line test (after group-evaluated intervention). The mean costs were calculated from the clinical genetics testing pathway constructed for each patient including the costs of genetic testing undertaken and clinical appointments scheduled. The outcome was the number of diagnoses each intervention produced so that a mean cost-per-diagnosis could be calculated. The cost effectiveness of the two interventions was calculated as an incremental cost-effectiveness ratio to produce an incremental cost-per-diagnosis (in 2013 GBP). Sensitivity analyses were conducted by altering both costs and effects to check the validity of the outcome.

RESULTS

The incremental mean cost of testing patients using the first-line testing strategy was -GBP241.56 (95% CIs -GBP256.93 to -GBP226.19) and the incremental mean gain in the percentage diagnoses was 0.39% (95% CIs -2.73 to 3.51%), which equates to an additional 1 diagnosis per 256 patients tested. This cost-effectiveness study comparing these two strategies estimates that array-CGH first-line testing dominates second-line testing because it was both less costly and as effective. The sensitivity analyses conducted (adjusting both costs and effects) supported the dominance of the first-line testing strategy (i.e. lower cost and as effective).

CONCLUSIONS

The first-line testing strategy was estimated to dominate the second-line testing strategy because it was both less costly and as effective. These findings are relevant to the wider UK NHS clinical genetics service, with two key strengths of this study being the appropriateness of the comparator interventions and the direct applicability of the patient cohort within this study and the wider UK patient population.

Removal of insoluble chloride from bottom ash for recycling

In order to recycle bottom ash and use it as raw material for cement production, the removal of insoluble chloride was investigated by testing various washing techniques. The present work is also focused on investigating the properties of insoluble chlorides and determining the conditions for dissolving these compounds in order to reduce the chlorine content to the required level, i.e., less than 0.1 wt%. Within this framework, the effect of washing with water and CO2 bubbling was investigated, because the main insoluble chloride found in bottom ash, i.e., Friedel's salt, can be dissolved by CO2. Then, in order to better understand the removal of Cl, Friedel's salt was artificially synthesized by hydration and then the effect of CO2 bubbling was investigated. If all chlorides in the ash are converted into Friedel's salt by hydration, all chlorides can then be dissolved by CO2 bubbling. In addition, the effect of pH on removing the remaining insoluble chlorides was investigated by washing the ash with sulfuric acid solution. It was found that the most effective technique to reduce the Cl content to less than 1000 ppm was washing with sulfuric acid solution, while keeping the pH value at less than 4. By using this method, Friedel's salt and other insoluble chlorides were dissolved.

Development of a method for the determination of human skin moisture using a portable near-infrared system

In this study, a portable near-infrared (NIR) system was newly integrated with a photodiode array detector that has no moving parts, and this system has been successfully applied for the evaluation of human skin moisture. The good correlation between NIR absorbance and the absolute water content of separated hairless mouse skin, in vitro, was showed, depending on the water content (7.4-84.9%) using this portable NIR system. Partial least squares (PLS) regression was used for calibration with the 1150-1650-nm wavelength range. For practical use for the evaluation of human skin moisture, the PLS model for human skin moisture was developed in vivo using the portable NIR system on the basis of the relative water content values of stratum corneum from the conventional capacitance method. The PLS model showed a good correlation. This study indicated that the portable NIR system, as compared to conventional methods, could be a powerful tool for human skin moisture, which may be much more stable to environmental conditions, such as temperature and humidity. Furthermore, to confirm the performance of the newly integrated portable NIR system, a scanning-type conventional NIR spectrometer was used in the same experiments, and the results were compared.

KR025, a new cytotoxic compound from Myxococcus fulvus

A new bithiazole, KR-025 (1), was isolated from Myxococcus fulvus. Its structure was elucidated by spectroscopic analysis. In addition to 1, the strain produced relatively large quantities of a second, closely related antibiotic, myxothiazol. These compounds demonstrated potent cytotoxicity against human tumor cells.

MR imaging of tears of discoid lateral menisci

OBJECTIVE

The purpose of this study was to determine the positive predictive value (PPV) for diagnosis of discoid lateral meniscal tear using MR imaging and to describe various patterns of such tears in the knee.

SUBJECTS AND METHODS

MR reports of 77 patients (10-67 years old) who underwent prospective MR imaging that led to a diagnosis of discoid lateral meniscal tear were correlated with arthroscopic results. MR images obtained in 71 patients confirmed to have discoid lateral meniscial tear were retrospectively reviewed for the presence, site, and pattern of discoid lateral meniscal tear, including type of displacement of the torn segment. MR abnormalities were correlated with arthroscopic findings.

RESULTS

For the prospective MR interpretations, the PPV for discoid meniscus was 92%. PPV for discoid meniscal tear was 57%. PPVs for individual types of discoid meniscal tears were 46% (peripheral tear, 19/41), 76% (peripheral tear with horizontal tears, 16/21), 56% (horizontal tear, 5/9), 50% (transverse tear, 1/2), 67% (horizontal tear combined with transverse tear, 2/3), and 100% (longitudinal tear, 1/1). Peripheral tear alone and peripheral tear with horizontal tear were the most common types of tears (n = 20, 28%). Multiple tears (n = 34, 48%) were common. Displacement of the torn segments was seen in 51 patients (72%).

CONCLUSION

MR imaging has a low PPV for diagnosing discoid lateral meniscal tear. Peripheral tear alone and peripheral tear with horizontal tear were the most common types of tears, and displacement of the torn segment was frequent.

Growth-inhibitory effects of Galla Rhois-derived tannins on intestinal bacteria

The growth-inhibitory activity of Galla Rhois-derived materials towards 17 intestinal bacteria was evaluated using an impregnated paper disc method. The biologically active components of Galla Rhois were characterized as the tannins methyl gallate (MG) and gallic acid (GA) by spectral analysis. The growth responses varied with bacterial strain tested. In the test using 10 mg disc-1, MG and GA produced a clear inhibitory effect on harmful bacteria such as Clostridium perfringens, Cl. paraputrificum, Eubacterium limosum, Bacteroides fragilis, Staphylococcus aureus and Escherichia coli. Methyl gallate showed no growth-inhibitory activity towards Bifidobacterium adolescentis or B. longum whereas the growth of B. bifidum, B. breve, B. infantis, B. animalis, B. thermophilum, Lactobacillus acidophilus, Lact. plantarum and Streptococcus faecalis was slightly affected. However, GA did not adversely affect the growth of the bifidobacteria and lactobacilli. At 5 mg disc-1, MG significantly inhibited the growth of Cl. perfringens and Cl. paraputrificum but did not affect the growth of the bifidobacteria and lactobacilli. At 1 mg disc-1, MG greatly inhibited the growth of Cl. perfringens alone. These results may be an indication of at least one of the pharmacological actions of Galla Rhois.

Two novel abietane diterpenes from Salvia miltiorrhiza

Two new abietane-type pigments named tanshinol A (1) and tanshinol B (2) have been isolated from the roots of Salvia miltiorrhiza B. (Labiatae) as minor components together with sixteen other related tanshinone pigments 3-18. The structures of the two novel components 1 and 2 were established by means of spectral analyses.

A novel flavonoid from Sophora flavescens

A new dihydroflavonol named kosamol A (1) has been isolated from the roots of Sophora flavescens (Leguminosae) along with twelve related flavonoids. The structure of 1 was determined to be (2R,3R)-5,7,2'4'-tetrahydroxy-6-(3-hydroxy-3-methylbutyl)-8-lavandulylflavanonol on the basis of spectral analyses.

Quality control testing of surfaces for mammalian cell culture using cells propagated in a protein-free medium

Mouse NCTC clone 929 L (L-929) cells were propagated continuously for 3 years as monolayers in a protein-free chemically-defined medium. These cells, designated L-929-WS, were used for quality control testing of the surfaces of commercially available cell culture plastic flasks. Differences in attachment and saturation density of L-929-WS cells in a protein-free culture medium were taken to define various levels of quality of the culture vessels tested. The rate of attachment and growth of L-929-WS cells on a surface of a given quality correlated directly with that of human embryonal fibroblasts and embryonal epithelial cells grown in a serum-free medium supplemented with growth factors and hormones. L-929-WS cells propagated continuously in a protein-free medium provide a simple and sensitive assay system for more general quality control testing of surfaces used for the culture of monolayer cells.

Effect of Panax ginseng extract on passive avoidance retention in old rats

Female rats of two groups (6 and 27 months) were tested in the passive avoidance test to investigate the age-dependency of the learning ability. The results showed a significantly better avoidance behavior in the young adult animals compared to the older ones. The influence of a 13-day treatment with Panax ginseng (30 mg/kg/d, oral) on 27 month old rats caused a considerably prolonging of the latency time in comparison to the untreated control group of the same age. In the open field the treated rats exhibited neither an altered locomotion nor exploration nor a changed emotional reactivity which could explain the improved avoidance reaction.

Aucubin: potential antidote for alpha-amanitin poisoning

Aucubin, an iridoid glucoside isolated from Aucuba japonica (Cornaceae), exhibited significant protective activity against alpha-amanitin intoxication in mice. When a single dose of aucubin was administered intraperitoneally, a 50% survival rate was obtained even when the treatment was withheld for 12 hr after alpha-amanitin administration. A possible mechanism of protective activity is partly due to a competitive effect of aucubin on alpha-amanitin inhibition of liver RNA biosynthesis.