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| 1 | Effects of icariin on cGMP-specific PDE5 and cAMP-specific PDE4 activities显示文摘Aim:To clarify the mechanism of the therapeutic action of icariin on erectlile dysfunction(ED).Methods:PDE5 was isolated from the human platelet and PDE4 form the rat liver tissue using the FPLC system (Pharmacia,Milton Keynes,UK)and the Mono Q column.The inhibitory effects of icariin on PDE5 and PDE4 activities were investigated by the two-step radioisotope procedure with [^3H]-c GMP/[^3H]-cAMP.Papaverine served as the control drug.Results:Icariin and papaverine showed dose-dependent inhibitory effects on PDE5 and PDE4 activities.The IC50 of Icariin and papaverine on PDE5 were 0.432μ mol/L and 0.680μmol/L,respectively and those on PDE4,73.50μmol/L and 3.07μmol/L,respectively.The potencies of selectivity of icariin and papaverine on PDE5(PDE4/PDE5 of IC50)were 167.67 times and 4.54 times,respectively.Conclusion:Icariin is a cGMP-specific PDE5 inhibitor that may be developed into an oral effective agent for the treatment of ED. | ZC Xin EK Kim CS Lin WJ Liu L Tian YM Yuan J Fu | 2003 | Asian Journal of Andrology2003，5，1： | 38 |
| 2 | 胆囊癌的临床诊疗现状与挑战显示文摘胆囊癌在胃肠道癌症中位居第五位,同时它也是胆道最常见的恶性肿瘤,约占80%~95%。这种肿瘤预后不佳,总体5年生存率低于5%,平均中位生存期〈6个月。因为胆囊癌在进展时可以没有任何症状,所以早期诊断是至关重要。术前诊断为胆囊结石,而术后确诊为胆囊癌的发生率为0.5%~1.5%。如果术前怀疑患者胆囊癌,则不应通过腹腔镜手术。流行病学研究已经确定了胆囊癌的发病率有地理和种族的显著差异:美洲的印第安人高发,东南亚地区也比较高,但在美洲和世界的其他地区发病率较低。环境诱发因素在胆囊癌的发展过程中发挥关键作用,胆石症、胆道和寄生虫感染的慢性炎症是最好的例证。在过去的10年里,改进成像技术和改良根治的手术方法可改善患者的预后,并帮助延长胆囊癌患者的存活时间。对于R0切除的胆囊癌患者,其总体5年生存率为21%~69%。在将来,潜在的诊断标志物的发展将对那些种族易感性或已知胆道解剖异常的人群提供早期筛查诊断的机会。 | Mislav Raki? Leonardo Patrlj Mario Kopljar Robert Kli?ek Marijan Kolovrat Bozo Loncar Zeljko Busic 冯铁诚 | 2016 | 中国普通外科杂志2016，25，2： | 24 |
| 3 | Effect of preoperative immunonutrition and other nutrition models on cellular immune parameters显示文摘AIM:To evaluate the effects of preoperative immunonutrition and other nutrition models on the cellular immunity parameters of patients with gastrointestinal tumors before surgical intervention.In addition,effects on postoperative complications were examined. METHODS:Patients with gastrointestinal tumors were randomized into 3 groups.The immunonutrition group received a combination of arginine,fatty acids and nucleotides.The second and third group received normal nutrition and standard enteral nutrition,respectively.Nutrition protocols were administered for 7 d prior to the operation.Nutritional parameters,in particular prealbumin levels and lymphocyte subpopulations(CD4+,CD8+,CD16+/56+,and CD69 cells)were evaluated before and after the nutrition protocols.Groups were compared in terms of postoperative complications and duration of hospital stay. RESULTS:Of the 42 patients who completed thestudy,16 received immunonutrition,13 received normal nutrition and 13 received standard enteral nutrition. prealbumin values were low in every group,but this parameter was improved after the nutritional protocol only in the immunonutrition group(13.64±8.83 vs 15.98±8.66,P=0.037).Groups were similar in terms of CD4+,CD16+/56,and CD69+prior to the nutritional protocol;whereas CD8+was higher in the standard nutrition group compared to the immunonutrition group.After nutritional protocols,none of the groups had an increase in their lymphocyte subpopulations.Also,groups did not differ in terms of postoperative complications and postoperative durations of hospital stay. CONCLUSION:Preoperative immunonutrition provided a significant increase in prealbumin levels,while it did not significantly alter T lymphocyte subpopulation counts,the rate of postoperative complications and the duration of hospital stay. | Yusuf Gunerhan Neset Koksal Umit Yasar Sahin Mehmet Ali Uzun Emel Ek■ioglu-Demiralp | 2009 | World Journal of Gastroenterology2009，15，4： | 21 |
| 4 | Endoscopic submucosal dissection for the treatment of neoplastic lesions in the gastrointestinal tract显示文摘AIM: To investigate the indications, resection rate, and safety of endoscopic submucosal dissection (ESD) for neoplastic lesions in the gastrointestinal tract at a European referral center. METHODS: We carried out a retrospective analysis of the ESD procedures performed in our center for mucosal neoplastic and submucosal lesions of the gastrointestinal tract. The duration of the procedure, en bloc and complete (R0) resection rates, and complication rates were evaluated. Variables were reported as mean ± SD or simple proportions. Univariate analysis and comparisons of procedure times and resection rates were performed using Mann-Whitney U tests, or χ2 tests for dichotomous variables.RESULTS: Between 2007 and 2011, ESD was performed in a total of 103 patients (46.7% male, mean age 64.0 ± 12.7 years). The indications for the procedure were epithelial tumor (n = 54), submucosal tumor (n = 42), or other (n = 7). The total en bloc resection rate was 90.3% (93/103) and R0 resection rate 80.6% (83/103). The median speed of the procedure was 15.0 min/cm2 . The complete resection rate was lower for submucosal tumors arising from the muscle layer (68%, 15/22, P < 0.05). Resection speed was quicker for submucosal tumors localized in the submucosal layer than for lesions arising from the muscularis propria layer (8.1 min/cm 2 vs 17.9 min/cm 2 , P < 0.05). The R0 resection rate and speed were better in the last 24 mo (90.1%, 49/54 and 15.3 min/cm 2 ) compared to the first 3 years of treatment (73.5%, 36/49, P < 0.05 and 22.0 min/cm2 , P < 0.05). Complications occurred in 14.6% (n = 15) of patients, including perforation in 5.8% (n = 6), pneumoperitoneum in 3.9% (n = 4), delayed bleeding in 1.9% (n = 2), and other in 2.9% (n = 3). Only one patient with delayed perforation required surgical treatment. During the mean follow-up of 26 ± 15.3 mo, among patients with R0 resection, recurrence occurred in one patient (1.2%).CONCLUSION: ESD is an effective and safe method for resection of neoplastic lesions with low recurrence. Speed and the R0 resection rate increased after 50 procedures. | Andrzej Biaek Anna Wiechowska-Kozowska Jan Pertkiewicz Katarzyna Karpińska Wojciech Marlicz Piotr Milkiewicz Teresa Starzyńska | 2013 | World Journal of Gastroenterology2013，19，12： | 21 |
| 5 | Probiotic effects on intestinal fermentation patterns in patients with irritable bowel syndrome显示文摘AIM: To determine whether Lactobacillus casei strain Shirota (Yakult ) can alter small intestinal bacterial overgrowth (SIBO), as tested by the lactulose breath test, and whether this is associated with changes in symptoms in irritable bowel syndrome (IBS). METHODS: 18 patients with IBS (Rome Ⅱ criteria), who showed an early rise in breath hydrogen with lactulose (ERBHAL), consumed 65 mL of Yakult daily for 6 wk. Lactulose breath test was repeated at the end of the treatment period. Symptoms were recorded daily using a 10 cm visual analogue scale. RESULTS: 14 patients completed the study, 9 (64%) had reversal of ERBHAL, with the median time of f irst rise in breath hydrogen increasing from 45 to 75 min (P = 0.03). There was no signifi cant improvement in the symptom score with probiotic therapy, except for wind (P=0.04). Patients commencing with at least moderate symptoms and who no longer had ERBHAL at the end of treatment, showed improvement in the overall symptoms scores [median fi nal score 5.3 (IQR3.9-5.9), 55% reduction; n=6] to a greater extent than those who had had persisting ERBHAL [final score 6.9 (5.0-7.0), 12% reduction; n = 5; P = 0.18]. CONCLUSION: Yakult is effective in altering fermentation patterns in the small bowel, consistent with reducing SIBO. The loss of ERBHAL was associated with reduced symptoms. The true interpretation of these fi ndings awaits a randomised, controlled trial. | Jacqueline S Barrett Kim EK Canale Richard B Gearry Peter M Irving Peter R Gibson | 2008 | World Journal of Gastroenterology2008，14，32： | 16 |
| 6 | Pulmonary involvement in inflammatory bowel disease显示文摘AIM:To determine the relationship of pulmonary abnormalities and bowel disease activity in inflammatory bowel disease(IBD).METHODS:Thirty ulcerative colitis(UC)and nine Crohn's disease patients,and 20 control subjects were enrolled in this prospective study.Detailed clinical information was obtained.Extent and activity of the bowel disease were established endoscopically.Each patient underwent pulmonary function tests and high-resolution computed tomography(HRCT).Blood samples for measurement of C-reactive protein(CRP),erythrocyte sedimentation rate(ESR),angiotensin converting enzyme and total IgE were delivered by the patients.RESULTS:Ten(25.6%)patients had respiratory symptoms.A pulmonary function abnormality was present in 22 of 39 patients.Among all patients,the most prevalent abnormalities in lung functions were a decrease in forced expiratory volume in 1 s(FEV1),FEV1/forced vital capacity(FVC),forced expiratory flow(FEF)25%-75%,transfer coefficient for carbon monoxide(DLCO),DLCO/alveolar volume.Increased respiratory symptoms score was associated with high endoscopic activity index in UC patients.Endoscopic and clinical activities in UC patients were correlated with FEV1,FEV1/FVC,and FEF 25%-75%.Smoking status,duration of disease and medication were not correlated with pulmonary physiological test results,HRCT abnormalities,clinical/endoscopic disease activity,CRP,ESR or total IgE level or body mass index.CONCLUSION:It is important that respiratory manifestations are recognized and treated early in IBD.Otherwise,they can lead to destructive and irreversible changes in the airway wall. | Aydin Yilmaz Nilgün Yilmaz Demirci Derya Hosgün Enver ner Yurdanur Erdogan Atila Gkek Atalay aglar | 2010 | World Journal of Gastroenterology2010，16，39： | 15 |
| 7 | 昆虫病原线虫(Steinernema longicaudum BPS品系)生物学测定显示文摘研究旨在明确采自北京平谷圣泉庵橡树根际土壤中昆虫病原线虫(Steinernema longicaudum BPS)的生物学特性,进而明确开发应用的可能性。结果显示:在剂量10和20IJs/幼虫下,BPS对寄主幼虫的侵染效果相近,大蜡螟的校正死亡率分别为40.0%和36.7%,黄粉甲的分别为50.0%、53.3%;在剂量40、80、160IJs/幼虫下,BPS的侵染力随剂量的增高而增大,大蜡螟和黄粉甲的校正死亡率分别为73.3%、86.7%、90.0%和70.0%、80.0%、90.0%;在剂量320和640IJs/幼虫下的侵染效果(校正死亡率100%)相近。BPS经40℃水浴处理1h校正死亡率达98%,处理3h,线虫100%死亡;经37℃、36℃和34℃水浴处理10h,校正死亡率分别为92.4%、55.4%和45.7%,处理20h,线虫100%死亡。该线虫在30℃条件下的水平运动能力比在18℃和25℃的强,有34.6%的线虫用24h的时间运动到3.6cm处。研究结果表明BPS具有较强的侵染力、耐热性和水平扩散能力,据此初步分析BPS具有被开发应用潜能。 | 刘奇志 张丽娟 王玉柱 杜小康 孙浩元 Zdeneck Mráek | 2009 | 中国农学通报2009，25，2： | 13 |
| 8 | Hypolipidaemic and antioxidant effect of Enicostemma littorale Blume显示文摘Objective:To investigate the hypolipidaemic and antioxidant effects of aqueous leaf extract of Enicoslemma littorale(E.littorale)Blume(Ens)against ethanol induced hepatic injury in albino rats.Methods:Male albino rats of six numbers in each group were undertaken for study.Hypolipidaemic and antioxidant effect of E.littorale Blume(Ens)aqueous leaf extract at a dosage of 250 mg/kg bw was evaluated.Results:Levels of serum and tissue cholesterol,triglycerides and free fatty acids were elevated and levels of tissue thiobarbituric acid reactive substances(TBARS)and lipid hydroperoxide were increased in ethanol treated rats.The activity levels of liver antioxidant enzymes such as superoxide dismutase(SOD),catalase(CAT),glutathione peroxidase(GPX)and glutathione-s-transferase(GST)were decreased.After adiminstration of extract of E,littorale Blume,levels of cholesterol,triglycerides and free fatty acids were decreased in serum and liver tissue,levels of TBARS and lipid hydroperoxide were decreased,and Ever antioxidant enzymes were increased in liver tissue;Conclusions:It can be concluded that the aqueous leaf extract of E,littorale Blume(Ens)has potent restorative effect on hyperlipidaemic and oxidative stress. | Thirumalai T Viviyan Therasa S Elumalai EK David E | 2011 | Asian Pacific Journal of Tropical Biomedicine2011，1，5： | 12 |
| 9 | 牙缺失预测心肌梗死、心力衰竭、卒中和死亡显示文摘本研究调查了以缺牙为代表的口腔健康状况是否与心血管疾病风险增加有关,包括心肌梗死(MI)、心力衰竭(HF)、卒中和全因死亡率.选取韩国国民健康保险随访2007年至2008年期间接受常规牙科检查和健康体检的受试者(n=4.440,970),主要随访指标包括MI、HF、卒中和死亡,随访至2016年,随访时间为 7.56 a。 | Lee HJ Choi EK Park JB 赵泽亮 | 2019 | 中国口腔颌面外科杂志2019，17，2： | 10 |
| 10 | Hypoglycemic effect of Brassica juncea(seeds) on streptozotocin induced diabetic male albino rat显示文摘Objective:To evaluate the hypoglycemic effect of Brassica juncea(seeds) on streptozotocin induced diabetic male albino rats.Methods:Hypoglycemic activity of Brassica juncea(seeds)aqueous extract at a dose of 250,350 and 450 mg/kg body weight was evaluated.Adult male Swiss albino rats of six numbers in each group was undertaken for study and evaluated.Results:The serum insulin levels were recorded a significant depletion in all groups,short term as well as long term diabetic animals,when compared to that of normal animals.A significant dosage dependent augmenting effect of the seed extract on the serum insulin was recorded in both short term as well as long term groups.Conclusions:The aqueous seed extract of Brassica juncea has potent hypoglycemic activity in male albino rat. | T Thirumalai S Viviyan Therasa EK Elumalai E David | 2011 | Asian Pacific Journal of Tropical Biomedicine2011，1，4： | 9 |
| 11 | Rabeprazole vs esomeprazole in non-erosive gastro-esophageal reflux disease: A randomized, double-blind study in urban Asia显示文摘AIM:Gastro-esophageal reflux disease (GERD) is becoming increasingly common in Asia. Data on the efficacy of proton pump inhibitors in patients with non-erosive GERD (NERD)in Asia is lacking. This double-blind study compared the efficacy and safety of rabeprazole with esomeprazole in relief of symptoms in patients with NERD.METHODS: One hundred and thirty-four patients with reflux symptoms of NERD and normal endoscopy were randomized to receive rabeprazole 10 mg or esomeprazole 20 mg once daily for 4 wk. Symptoms were recorded in a diary and changes in severity of symptoms noted.RESULTS: At 4 wk of treatment, rabeprazole 10 mg and esomeprazole 20 mg were comparable with regards to the primary endpoint of time to achieve 24-h symptomfree interval for heartburn 8.5 d vs9 d and regurgitation 6 d vs 7.5 d. Rabeprazole and esomeprazole were also similarly efficacious in term of patient's global evaluation with 96% of patients on rabeprazole and 87.9% of patients on esomeprazole, reporting that symptoms improved(P=NS). Satisfactory relief of day- and night-time symptoms was achieved in 98% of patients receiving rabeprazole and 81.4% of patients receiving esomeprazole. Adverse events were comparable in both groups (P = NS).CONCLUSION: Rabeprazole 10 mg has a similar efficacy and safety profile in Asians with NERD as esomeprazole 20 mg. Further study is necessary to investigate whether the small differences between the two drugs seen in this study are related to the improved pharmacodynamicpro perties of rabeprazole. Both drugs were well tolerated. | KM Fock EK Teo TL Ang TS Chua TM Ng YL Tan | 2005 | World Journal of Gastroenterology2005，11，20： | 8 |
| 12 | Antibacterial activity of various leaf extracts of Merremia emarginata显示文摘Objective:To investigate the antibacterial activity and phytochemical screening of the aqueous.methanol and petroleum ether leaf extracts of Merremia emarginata(M.emarginata).Methods:The antibavterial activity of leaf extracts of M.emarginata were evaluated by agar well diffusion method against four selected bacterial species.Results:The presence of tannins,flavonoids,amino acids,starch,glycosides and carbohydrates in the different leaf extracts was established.The methanol extract was more effective against Baciilus cereus and Eseherkhia coli,whereas aqueous extract was more effective against Staphylococcus aureus and Pseudomonas aeruginosa.Condusions:The results in the present study suggest that M.emarginata leaf can be used in treating diseases caused by the tested organisms. | EK Elumalai M Ramachandran T Thirumalai P Vinothkumar | 2011 | Asian Pacific Journal of Tropical Biomedicine2011，1，5： | 8 |
| 13 | Role of sonic hedgehog in maintaining a pool of proliferating stem cells in the human fetal epidermis显示文摘 | Zhou JX Jia LW Liu WM Miao CL Liu S Cao YJ Duan EK | 2006 | 中国生物学文摘2006，20，5： | 8 |
| 14 | Significant decrease in prevalence ofHelicobacter pylori in the Czech Republic显示文摘AIM:To study possible decrease in prevalence of Helicobacter pylori(H.pylori) infection in the Czech Republic within a 10-year period.METHODS:A total of 22 centres entered the study.The catchment areas of these centres covered cities and towns with more than 20 000 inhabitants,smaller towns(≤ 20 000 inhabitants) with surrounding villages and rural areas,and were spread over the whole country,corresponding well to the geographical distribution of the Czech population.A total of 1 837 subjects(aged 5-98 years) took part in the study,randomly selected out of 38 147 people from the general population.H.pylori infection was investigated by means of a 13 C-urea breath test.Breath samples in duplicates were analysed using isotope ratio mass spectrometry.The cut-off point was 3.5.Social and demographic characteristics were based on data from self-completed questionnaires.RESULTS:The overall prevalence of H.pylori infection was 23.5%(430/1826),and 4.8%(20/420) in children aged 15 or less.There was no statistically significant difference in prevalence between males(24.3%;208/857) and females(22.9%,222/969,P = 0.494).H.pylori infection was strongly associated with higher age,among subjects aged 55+ years,prevalence of H.pylori infection was 39.8%(252/633,P < 0.001).The highest prevalence of H.pylori infection was found among persons aged 55-64 years(43.9%,97/221) and 75+ years(37.9%,58/153).Among study subjects aged 15+ years,prevalence of H.pylori infection was significantly increased in those with lowest education(odds risk 3.19,95% CI 1.87-5.47).Compared to never married(14.1%),the prevalence of H.pylori infection was statistically significantly higher among married(35.4%,246/694,P < 0.001),divorced(36.8%,49/133,P < 0.001) and widowed study subjects(40.2%,45/112,P < 0.001),both in minimally and fully adjusted analysis.There was no significant difference in the prevalence of H.pylori infection between married and widowed subjects(35.4%,246/694 vs 40.2%,45/112,P = 0.389).There was little variation in smoking prevalence across categories of smoking and there was no evidence of an increased risk ofH.pylori infection among current or past smokers in our data(odds risk 1.04 with 95% CI 0.78-1.40 for current smokers;odds ratio 0.83 with 95% CI 0.60-1.16 for former smokers).The current prevalence of H.pylori in 2011 was significantly lower compared to the prevalence reported from identical geographical areas in 2001(23.5%vs 41.7%,P < 0.001).CONCLUSION:The overall prevalence of H.pylori infection in the general population has fallen substantially in the Czech Republic over the past 10 years. | Jan Bure Marcela Kopáová Ilona Koupil Bohumil Seifert Miluka kodová Fendrichová Jana pirková Viktor Voíek Stanislav Rejchrt TomáDouda Norbert Král Ilja Tachecí | 2012 | World Journal of Gastroenterology2012，18，32： | 8 |
| 15 | Synchronous and metachronous neoplasms in gastric cancer patients:A 23-year study显示文摘AIM:To determine the prevalence and characteristics of additional primary malignancies in gastric cancer(GC)patients.METHODS:GC patients(862 total;570 men,292women;mean age 59.8±12.8 years)diagnosed at the Department of Gastroenterology at Pomeranian Medical University over a period of 23 years were included in this retrospective analysis of a prospectively maintained database.Mean follow-up time was 31.3±38.6 mo(range 1-241 mo).The following clinicopathological features of patients with synchronous tumors were compared to those with metachronous tumors:age,sex,symptom duration,family history of cancer,tumor site,stage(early vs advanced),histology,and blood group.GC patients with and without a second tumor were compared in terms of the same clinicopathological features.RESULTS:Of 862 GC patients,58(6.7%)developed a total of 62 multiple primary tumors,of which 39(63%)were metachronous and 23(37%)synchronous.Four(6.9%)of the 58 multiple GC patients developed two or more neoplasms.The predominant tumor type of the secondary neoplasms was colorectal(n=17),followed by lung(n=9),breast(n=8),and prostate(n=7).Age was the only clinicopathological feature that differed between GC patients with synchronous vs metachronous malignancies;GC patients with synchronous neoplasms were older than those with metachronous neoplasms(68.0±10.3 years vs 59.9±11.1years,respectively,P=0.008).Comparisons between patients with and without a second primary cancer revealed that the only statistically significant differences were in age and blood group.The mean age of the patients with multiple GC was higher than that of those without a second primary tumor(63.4±11.4years vs 59.5±13.0 years,respectively,P=0.026).GC patients with a second primary tumor were more commonly blood group O than those without(56.2%vs 31.6%,respectively,P=0.002).CONCLUSION:GC patients may develop other primary cancers;appropriate preoperative and postoperative diagnostic modalities are thus required,particularly if patients are older and blood group O. | Magorzata Lawniczak Alicja Gawin Halina Jaroszewicz-Heigelmann Wiesawa Rogoza-Mateja Joanna Raszeja-Wyszomirska Andrzej Biaek Katarzyna Karpińska-Kaczmarczyk Teresa Starzyńska | 2014 | World Journal of Gastroenterology2014，20，23： | 8 |
| 16 | Acute chylous ascites mimicking acute appendicitis in a patient with pancreatitis显示文摘We report a case of acute chylous peritonitis mimicking acute appendicitis in a man with acute on chronic pancreatitis. Pancreatitis, both acute and chronic, causing the development of acute chylous ascites and peritonitis has rarely been reported in the English literature. This is the fourth published case of acute chylous ascites mimicking acute appendicitis in the literature. | Emily K Smith Edmund Ek Daniel Croagh Lavinia A Spain Stephen Farrell | 2009 | World Journal of Gastroenterology2009，15，38： | 7 |
| 17 | 小杆线虫Rhabditis(Oscheius)sp.生物学特性测定显示文摘[目的]对从内蒙古自治区呼伦贝尔盟海拉尔市苜蓿根际土壤中分离出的小杆线虫[Rhabditis(Oscheius)sp.]的生物学特性进行测定。[方法]以大蜡螟(Galleriamellonella)和黄粉甲(Tenebriomolitor)老熟幼虫为寄主,测定小杆线虫的侵染力;以水浴方法测定小杆线虫的耐热能力。[结果l小杆线虫在10、20和40IJs/虫的剂量下侵染力较低;但在80、160、320和640IJs/虫的剂量下侵染力较高,大蜡螟96h、黄粉甲120h的校正死亡率均达90%以上;在80IJs/虫的剂量下侵染力最高,侵染120h,寄主的校正死亡率达100%。浓度1000~5000U/ml的小杆线虫在36℃条件下水浴2d,有25%左右的个体存活,水浴6d,仍有3%~9%的个体存活,至第9天,线虫个体全部死亡;在38℃下水浴6h、40℃下水浴2h,线虫个体全部死亡。[结论]小杆线虫具有较强的侵染力和耐热能力,具有开发应用潜能。 | 张丽娟 刘奇志 王玉柱 杜小康 孙浩元 Zdeneck Mráek | 2010 | 安徽农业科学2010，38，1： | 6 |
| 18 | Biofabrication of Ag nanoparticles using Moringa oleifera leaf extract and their antimicrobial activity显示文摘Objective:To formulate a simple rapid procedure for bioreduction of silver nanoparticles using aqueous leaves extract of Moringa oleifera(M.oleifera).Methods:10 mL of leaf extract was mixed to 90 mL of 1 mM aqueous of AgNO_3 and was heated at 60-80 ℃ for 20 min.A change from brown to reddish color was observed.Characterization using UV-Vis spectrophotometry, Transmission Electron Microscopy(TEM) was performed.Results:TEM showed the formation of silver nanoparticles with an average size of 57 nm.Conclusions:M.oleifera demonstrates strong potential for synthesis of silver nanoparticles by rapid reduction of silver ions(Ag^+ to Ag^0). Biological methods are good competents for the chemical procedures,which are eco-friendly and convenient. | Prasad TNVKV Elumalai EK | 2011 | Asian Pacific Journal of Tropical Biomedicine2011，1，6： | 6 |
| 19 | 可逆热致变色油墨的色度学特性研究显示文摘本文研究了活化温度为31℃的3种含隐色染料基的热致变色油墨的色度学特性。这3种油墨具有相似的颜料粒径分布和同等厚度且对氧等离子体腐蚀相对稳定的微胶囊壳。油墨颜色与温度、引起颜色滞后的样品热史两个因素有关。比较脱色和着色过程,在CIELAB色空间中所观测的滞后环面积决定了样品上色差的大小。同一样品所能达到的最大色差是由样品不同的热史和温度决定。4个特征温度描述了引起颜色滞后的2个化学反应。当冷却到低于活化温度时,脱色状态的稳定性超过10h。热致变色效应的可逆性随着最高加热温度约呈线性降低。 | Rahela Kular Moja Frikovec Nina Hauptman Alenka Vesel Marta Klanjek Gunde 柳玲 | 2010 | 中国印刷与包装研究2010，2，3： | 6 |
| 20 | 抗菌型鞋衬里革的制备及抗菌性能研究显示文摘使用一种新的抗菌剂——4-(2-苯并噻唑基亚氨甲基)苯氧乙酸的铜配合物(简称CCBMP),以喷洒的方式加入到鞋衬里革中,并采用抑菌圈法和抑菌率法测定了鞋衬里革对从鞋内分离出来的霉菌、细菌和酵母菌的抑制效果,结果表明:当该化合物在鞋衬里革中的含量为18.68g/kg时,鞋衬里革对混合细菌、混合霉菌和混合酵母菌的抑菌率,分别为99.83%、99.98%和99.99%,而要形成清晰的抑菌圈,它在鞋衬里革中的含量则要到达37.59g/kg。 | 辜海彬 赵长青 陈武勇 郝霞 Petr Hlavek | 2009 | 中国皮革2009，38，5： | 6 |
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