Progress and prediction of multicomponent quantification in complex systems with practical LC-UV methods / 药物分析学报

Complex systems exist widely,including medicines from natural products,functional foods,and bio-logical samples.The biological activity of complex systems is often the result of the synergistic effect of multiple components.In the quality evaluation of complex samples,multicomponent quantitative analysis(MCQA)is usually needed.To overcome the difficulty in obtaining standard products,scholars have proposed achieving MCQA through the"single standard to determine multiple components(SSDMC)"approach.This method has been used in the determination of multicomponent content in natural source drugs and the analysis of impurities in chemical drugs and has been included in the Chinese Pharmacopoeia.Depending on a convenient(ultra)high-performance liquid chromatography method,how can the repeatability and robustness of the MCQA method be improved?How can the chromatography conditions be optimized to improve the number of quantitative components?How can computer software technology be introduced to improve the efficiency of multicomponent analysis(MCA)?These are the key problems that remain to be solved in practical MCQA.First,this review article summarizes the calculation methods of relative correction factors in the SSDMC approach in the past five years,as well as the method robustness and accuracy evaluation.Second,it also summarizes methods to improve peak capacity and quantitative accuracy in MCA,including column selection and two-dimensional chromatographic analysis technology.Finally,computer software technologies for predict-ing chromatographic conditions and analytical parameters are introduced,which provides an idea for intelligent method development in MCA.This paper aims to provide methodological ideas for the improvement of complex system analysis,especially MCQA.

Quantitative Detection of Aflatoxin B1 in Traditional Chinese Medicine by Colloidal Gold Immunochromatography / 中国药学杂志

OBJECTIVE：To explore the feasibility of using colloidal gold immunochromatography for quantitative detection of aflatoxin B1 in traditional Chinese medicine. METHODS：Negative samples were used to investigate matrix interference by different levels of spikes.The rapid inspection performance was evaluated by examining the precision, sensitivity, linearity, repeatability and recovery rate. The sample was determined by rapid test method and verified by HPLC. RESULTS：High-concentration and low-concentration aflatoxin B1 reference materials were added to the negative sample matrix. After the measurement, it was found that there were matrix interferences in the samples such as tangerine peel and cassia seed, and the interference was greater when the concentration was increased. So high dilution factor was used to reduce the interference. The precision RSD of the rapid test method was 4.6% (n=10), the reproducibility RSD was 4.1% (n=6), and the recoveries of different samples were between 72.8% and 112.8%. The overall performance of the method was good. A total of 43 batches of 19 kinds of medicinal materials such as silkworm, cockroach and leeches were detected by two methods. The coincidence rate between the fast test and the HPLC test was 83.7%. Therefore, the results obtained by the two detection methods were considered to be approximate. CONCLUSION：Colloidal gold immunochromatographic rapid test method can be used for the quantitative detection of aflatoxin B1 in some traditional Chinese medicines, and provides technical support for the establishment and improvement of relevant rapid detection standard methods.

Necesidad de tratamiento periodontal en adolescentes de 12 años de colegios municipalizados en Valdivia-Chile 2014: estudio transversal / Periodontal treatment needs in 12 year-old adolescents of municipal schools in Valdivia-Chile 2014: A cross-sectional study

Objetivo Determinar la necesidad de tratamiento periodontal de los adolescentes de 12 años de colegios municipalizados urbanos en la ciudad de Valdivia, Chile, en el año 2014. Material y métodos Estudio de corte transversal, donde se evaluó una muestra de 225 adolescentes de 12 años pertenecientes a colegios municipales de la ciudad de Valdivia, entre los meses de abril y mayo del año 2014. Para determinar la necesidad de tratamiento se utilizó el Índice de necesidad de tratamiento periodontal de la comunidad (CPITN). Resultados Los hallazgos revelaron que el 8% de los adolescentes examinados presentó un periodonto sano, un 40,9% sangrado al sondaje, un 47,6% cálculo y un 3,5% inspección a través de un periodontograma completo para determinar si existe periodontitis leve, moderada o grave. Conclusión Según los resultados obtenidos se evidencia que existe una alta necesidad de tratamiento periodontal en los adolescentes de 12 años pertenecientes a los colegios municipales urbanos de Valdivia. Con los datos obtenidos se puede incentivar el inicio de futuras investigaciones, y planificar programas odontológicos en la región que hagan énfasis en la prevención y tratamiento de las enfermedades periodontales desde el nivel primario de salud.

Objective To assess the periodontal treatment needs of 12 year-old adolescents of urban municipal schools in Valdivia, Chile. Materials and methods A cross-sectional, descriptive, observational study was carried out. A total of 225 adolescents of 12 years of age attending municipal schools in Valdivia between April and May, who met the inclusion criteria were evaluated. Treatment needs were determined using the Community Periodontal Index of Treatment Needs (CPITN). Results The findings revealed that 8% of the examined adolescents had a healthy periodontium, 40.9% had gingival bleeding on probing, 47.6% had calculus deposits, and 3.5% were examined using a periodontal chart to determine mild, moderate, or severe periodontitis. Conclusion According to the results it is evident that there is a high need for periodontal treatment by 12 year old adolescents attending urban municipal schools in Valdivia. The data of this study will help encourage additional research on the subject and in planning dental programs in the region, with emphasis on prevention and treatment of periodontal diseases from primary health care.

Determination of rasagiline mesylate in human plasma by LC-MS/MS and its pharmacokinetics study / 中国药理学通报

Aim To develop LC-MS/MS method to de-termine rasagiline mesylate in human plasma and its application in a pharmacokinetics study .Methods Plasma samples were extracted using liquid-liquid ex-traction with clopidogrel as internal standard .The con-tent of rasagiline mesylate in human plasma was detec-ted by selectivelypositive ion reaction monitoring on a triple quadrupoles tandem mass spectrometer .The de-tected ions were m/z 172.3→117.1 ( rasagiline ) , m/z 322.3 →184.0 ( clopidogrel ) .The linear calibration curve was obtained in the concentration range of 0.1047~20.93 μg · L-1 .The lower limit of quantifi-cation was 0.1047 μg · L-1 .Indicators of the method validation were in line with requirements .The method was used to determine the concentration of rasagiline in human plasma after oral administration of rasagiline mesylate capsule to 24 healthy Chinese volunteers ( with half males and females ) and the results were compared statistically .Results The single oral dose of 0.5 ,1.0 and 2.0 mg presented linear pharmacokinetics in the health volunteers .No accumulation was observed with multiple doses .Meanwhile , no significant difference was identified between the gender groups . High fat postprandial has obvious effects on the peak serum con-centration of rasagiline , but there was no effect on the absorption amount and cumulative excretion .Conclu-sion The LC-MS/MS method is specific and sensi-tive, and can be successfully applied to the pharmaco-kinetic study of Rasagiline mesylate tablets in healthy Chinese volunteers .

Detecção de resistência às fluoroquinolonas em Campylobacter isolados de frangos de criação orgânica / Detection of fluoroquinolone resistance in Campylobacter strains from organic poultry

Estudos têm revelado que a resistência às quinolonas em cepas de Campylobacter está relacionada à presença da mutação Treonina-86 para Isoleucina. Com o objetivo de investigar a presença dessa mutação em cepas de Campylobacter sensíveis e resistentes à ciprofloxacina e enrofloxacina, o conteúdo cecal de 80 frangos de corte de criação orgânica, abatidos sob Serviço de Inspeção Estadual (S.I.E.) do Estado do Rio de Janeiro, foram coletados e investigados para a presença de Campylobacter. A determinação da resistência à ciprofloxacina e enrofloxacina foi feita pela técnica de difusão em disco e de diluição em ágar para determinação da Concentração Inibitória Mínima (CIM). A detecção da mutação na Região Determinante de Resistencia às Quinolonas (RDRQ) no gene gyrA foi realizada através de sequenciamento. Campylobacter foi isolado a partir de 100% das amostras avaliadas, sendo 68,75% correspondente à C. jejuni e 31,25% à C. coli. No teste de difusão em disco, 100% das cepas foram resistentes à ciprofloxacina e 56,25% das cepas foram resistentes à enrofloxacina. No teste de diluição em ágar, todas as cepas foram resistentes à ciprofloxacina apresentando CIM variando de ≥ 16-64μg/mL, e resistência ou resistência intermediaria à enrofloxacina foi detectada em 42,50% (CIM ≥ 4-32μg/mL) e 38,75% (CIM = 2μg/mL) das cepas, respectivamente. A mutação Tre-86-Ile, foi observada em 100% das cepas analisadas. Além dessa mutação, foram observadas outras mutações não silenciosas (Val-73-Glu, Ser-114-Leu, Val-88-Asp, Ala-75-Asp, Ser-119-Gli, Arg-79-Lis) e mutações silenciosas (His-81-His, Ser-119-Ser, Ala-120-Ala, Fen-99-Fen, Ala-122-Ala, Gli-74-Gli, Ile-77-Ile, Ala-91-Ala, Leu-92-Leu, Val-93-Val, Ile-106-Ile, Tre-107-Tre, Gli-113-Gli, Ile-115-Ile, Gli-110-Gli). A observação de que cepas sensíveis à enrofloxacina pelos testes fenotípicos apresentavam a substituição Tre-86 para Ile sugere que outros mecanismos podem contribuir para a resistência à enrofloxacina em Campylobacter...

Studies have shown that resistance to quinolones in Campylobacter strains is related with Threonine-86-Isoleucine mutation. In order to investigate the presence of this mutation in sensitive and resistant Campylobacter strains to ciprofloxacin and enrofloxacin, the cecal contents of 80 broilers from organic raising chickens, slaughtered under State Inspection Service (S.I.S) of the State of Rio de Janeiro, were collected and tested for the presence of Campylobacter. The determination of ciprofloxacin and enrofloxacin susceptibility was done by disk diffusion and agar dilution methods for determining the Minimum Inhibitory Concentration (MIC). The detection of mutation in Quinolone Resistance Determinant Region (QRDR) in gyrA gene was done by sequencing. Campylobacter was isolated from 100% of the samples, being 68.75% C. jejuni and 31.25% C. coli. By the disk diffusion method, resistance to ciprofloxacin was observed in all isolates and 56.25% of the strains were resistant to enrofloxacin. By agar dilution method, all strains were resistant to ciprofloxacin (MIC ≥ 16μg/mL to ≥ 64μg/mL) and full and intermediate resistance to enrofloxacin was detected in 42.50% (MIC ≥ 4-32μg/mL) and 38.75% (MIC =2μg/mL) of the strains, respectively. Mutation Thr-86-Ile was observed in 100% of the isolates investigated. In addition to this mutation, others no silent mutations (Val-73-Glu, Ser-114-Leu, Val-88-Asp, Ala-75-Asp, Gly-119-Ser, Arg-79-Lys) and silent mutations (His-81-His, Ser-119-Ser, Ala-120-Ala, Phe-99-Phe, Ala-122-Ala, Gly-74-Gly, Ile-77-Ile, Ala-91-Ala, Leu-92-Leu, Val-93-Val, Ile-106-Ile, Thr-107-Thr, Gly-113-Gly, Ile-115-Ile, Gly-110-Gly) were detected. All the enrofloxacin-sensitive strains by the phenotypic methods had the Thr-86 to Ile substitution, which suggests other mechanisms contributing to enrofloxacin resistance in Campylobacter...

Prevalence of Malaria and Co-infection with Human Immuno-Deficiency Virus (HIV) in Selected Areas of Ondo State, Nigeria.

The prevalence of malaria and its co-infection with Human Immunodeficiency Virus (HIV) was investigated in Owena, Idanre Local Government Area and State Hospital Akure, Ondo State, Nigeria. A total of 150 blood samples (Total number at, Owena = 88 and the State Hospital = 62) were collected and examined respectively for the presence of malaria using thick and thin blood smear; and also for the presence of Human Immunodeficiency Virus (HIV) using Abbott Determine kit and Stat Pak kit. The age and sex related prevalence of malaria infection in Owena shows that the overall prevalence was 54.5%. Malaria was found to be high among females (54.7%) than in males (54.2%). The age and sex prevalence of malaria infection in State Hospital shows that the overall prevalence was (54.8%). Malaria was found to be higher in females (56.8%) than in males (52.0%). Co-infection of malaria with HIV by sex in Owena shows that the infection was generally low (2.3%) but prevalence was higher in females (3.1%) than in males (0.0%). The sex distribution of malaria with HIV as co-infection in State Hospital shows that the infection was generally low (4.8%) but higher in females (5.4%) than in males (4.0%). The reasons for the high prevalence of malaria with HIV co-infection were discussed. This study suggested the need for more enlightenment campaign and public awareness of malaria and HIV infection.

The determination and analysis of CRP and PLT for patients with acute myocardium infarction / 国际检验医学杂志

Objective Testing the CRP and PLT for patients with acute myocardium infarction(AMI) .Analysising the relation‐ship between AMI and CPR or PLT .Methods We chose 60 patients with AMI who treat in our hospital during 2012/11 and 2014/10 as an observation group .As the same time ,we also chose 60 healthy person as a comparison group .Testing the CRP and PLT of the two groups with the same method ,and then we compare and analysis the results .Results The observation group's concentration of CRP is (22 .13 ± 4 .71)mg/L ,level of PLT is (241 ± 33)× 109/L .The comparison group's concentration of CRP is(2 .74 ± 0 .49) mg/L ,level of PLT is(162 ± 26) × 109/L .The result of the observation group is obvious higher than the comparison group ,and the difference is significance(P<0 .05) .The observation group's positive rate of CRP is 73 .33% ,increase of PLT is 38 .33% .The comparison group's positive rate of CRP is 3 .33% ,increase of PLT is 5 .00% .The result of the observation group is obvious higher than the comparison group ,and the difference is significance(P<0 .05) .Conclusion To the clinical diagnosis of AMI ,testing the CRP concentration and the PLT level is useful to understand the patient's host defenses and inflammation condition .It has clinical value to AM I's prevent ,diagnosis and prognosis .

Logic Problem Analysis on Determination of Syndrome-attribution in A Variety of Animal Model Establishment Methods / 世界科学技术-中医药现代化

Intervening animals by pathogen of traditional Chinese medicine (TCM) to establish animal model is the most common and easiest method to determine syndrome attribute of an animal model. However, the underlying prob-lem of this modeling method is that the concept of wind, cold and dampness in the nature are confused with the syn-drome of wind-cold-dampness summarized by abnormal appearance of clinical patients. The typical animal model establishment are through the methods of wind blowing, low temperature freezing, cold water immersion, environmen-tal humidity increasing. Modern medical modeling methods, such as chemicals, organ resections, are also used in the establishment of animal models. Then, the syndrome-attribution of modeling animal is evaluated by physicochemical indexes of modern medicine which is one of modeling methods that have been used by academia in early times. But animal model established by this method is a kind of disease model which is lack of sufficient theoretical and clini-cal evidences. Therefore, the syndrome-attribution should be reappraised among this kind of animal models.

Study to determine the behavior expression system of hospitals' social responsibilities / 中华医院管理杂志

By means of literature review,the authors initiated the behavior expression system of hospitals' social responsibilities,which is further refined and revised with questionnaires and Delphi method.13 expressions of such behavior expressions were determined,namely “providing quality of care to patients”,“undertaking rescue assignment for emergencies”,and “fulfilling government-assigned tasks”.All of the 13 expressions were supported by 75％ of the experts during the second round of experts consultation.

Reliability of Nutritional Screening Using DETERMINE Checklist for Elderly in Korean Rural Areas by Season / 대한지역사회영양학회지

It is very important to screen the elderly for nutritional risk, because nutritional status is a critical factor to maintain their health. Some nutrition checklists used in Korea for the elderly are from other countries. Reliability of those checklist in Korea is not studied enough. This survey was done for the elderly over 65-years-old who live in Hongcheon, An-dong, Dam-yang and Yeon-gi in Korea (subject; summer: 146, winter: 145) to study the reliability of DETERMINE checklist which is adopted widely in Korea. Using the score of DETERMINE checklist, the elderly were divided as high, middle and low risk groups. For nutritional assessment for those elderly, dietary assessment using 24 recall, anthropometry, biochemical assessment and health condition were used. Results for the checklist showed that percentage below EAR for energy intake and protein intake in winter were higher in the high risk group than other groups. The intakes of phosphorus and iron and most vitamins were below the DRI. The percentage of subjects with intake below DRI was highest in the high risk group. Sensitivity, specificity, and positive predictive values using the DETERMINE were calculated using 6 point as a cut-off point. Subjects were divided into two groups by MAR (MAR< 0.75:undernutrition, MAR< 0.75 : normal). Sensitivity recorded 49.4% and 34.3%, specificity did 61.9% and 65.4 and Positive predictive value did 62.1% and 46.0% each for summer and winter. Results of screening using DETERMINE Checklist were not matched with dietary assessment but not with anthropometric and biochemical measurement. In conclusion DETERMINE 'Checklist' is shown be a good screening tool for finding out risk groups for dietary intake in the elderly, It needs to verify reliability and validity through large-scale survey.

Content Determination of Tannin in Platycladus orientalis (L.) Franco and Its Carbonisatus / 中国中医药信息杂志

Objective To compare the tannin contents of Platycladus orientalis(L.) Franco and its carbonisatus.Method A tungsten molybdophosphate-casein colorimetric method was used with gallic acid as reference substance.Results The standard curve in the range of 0.026～0.26 mg(r =0.999 4),and the average recovery rate was 97.85%,RSD=1.07%(n =9).Conclusion The method is reliable and can be used to determine the tannic of and its different processed products.

Determination of Norcantharidin using high performance liquid chromatography / 中国药理学通报

ABSTRACT AIM To determine Norcantharidin in its tables. METHODS A PHLC method was adopted, using Polaris C18 column(5?,4.6?250 mm) and UV detector at 211 nm wavelength. The mobile phase is consisted of water: methanol(85 : 15 V/V), adjust the pH to 3.1 with phosphoric acid. RESULT Excellent liner relationship was ob- tained from the range of 25 to 1 000 mg ? L-1. The minimal limit of Norcantharidin was 0.2 mg ? L-1. Recovery was 100.84% and RDS was 1.335%. COUCLUSION Practice suggested that this method was rapid, accuracy and suitable for Norcantharidin determining.