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Fitting and evaluation of height-diameter models for Alnus japonica in La Trinidad, Benguet, Philippines

Journal of Mountain science 2018年第11期15卷 2422-2432页

作者： Kamae P.ANACIOCO Judy Ann L.GORIO mary relia s.padsico Roscinto Ian C.LUMBREs Nova D.DOYOG Young Jin LEE College of Forestry Benguet State University Department of Forest Resources College of Industrial Science Kongju National University

The study was conducted to develop height-diameter at breast height(HT-DBH) models for Alnus japonica in La Trinidad, Benguet,Philippines and evaluate their predictive *** six widely used nonlinear growth models that were selected in this study were the ChapmanRichards, schnute, Modified logistic, Korf/Lundqvist,Weibull and Exponential. A total of 208 Alnus japonica trees were measured using standard diameter tape for DBH(1.3 m above the ground) and Vertex and transponder was used for the total height measurement. The performance of the developed models were evaluated using the fit statistics including coefficient of determination(R^2), root mean square error(RMsE), mean bias(ē), absolute mean difference(AMD), and Akaike Information Criterion(AIC). The lack-of-fit statistics was also performed for further evaluation of the performance of the *** on the evaluation criteria, all six models were able to determine the DBH-height relationships and fitted the data well. Using the rank analysis, the Weibull HT-DBH model had the best performance among the six commonly used nonlinear growth models. The results of this study will help forest managers especially in La Trinidad, Benguet to easily predict the total height using the Weibull model for Alnus japonica utilizing the DBH as the predicting variable.

关键词： Height- DBH model Alnus japonica Rank analysis La Trinidad Benguet Philippines

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Dispersion effect of nano-structure pyrolytic carbon on mechanical,electrical,and microstructural characteristics of cement mortar composite

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International Journal of smart and Nano Materials 2024年第3期15卷 534-578页

作者： N.K.Karthikeyan s.Elavenil school of Civil Engineering Vellore Institute of TechnologyChennaiIndia

In material science,converting waste into nanomaterials by green technologies highlights the interest in producing sus-tainable carbon nanomaterial(sCN).This study first-ever uti-lized tyre-char as a Nano-structure Pyrolytic Carbon(NsPC)to develop electrically conductive *** other car-bon nanomaterials,the efficiency of NsPC particle as an sCN in developing electrically conductive composites was investi-gated in terms of dispersion,mechanical,water absorption,electrical resistivity,and *** results of sedi-mentation and zeta potential(-19 mV)showed the excellent dispersion of NsPC particle in water with the combined effect of superplasticizer and *** compressive(40.37%)and flexural strength(10.76%)than that of plain cement mortar composite(CMC)is achieved with 2 wt.%and 1.5 wt.%of NsPC particle,*** water absorption rate and volume of permeable voids were reduced,exhibiting less *** percolation zone of AC and DC resis-tivity of NsPC composite ranges between 1 and 2 wt.%,and the established percolation threshold is at 2 wt.%.XRD analysis showed C-s-H formation consistently increased with curing age,and HR-sEM with EDAX analysis exhibits the dense micro-structure and well-distributed NsPC particle at the *** experimental outcomes significantly enhanced the relia-bility and provided a framework for tailoring NsPC particle as sCN for developing electrically conductive composite.

关键词： sustainable nanomaterial dispersion mechanical properties electrical resistivity microstructure analysis

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尿路清合剂体外抗奈瑟淋球菌作用的研究

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山西中医 2010年第6期26卷 41-42,44页

作者：陆原陈达灿禤国维李清柴宝何雯翁翊广东省深圳市第六人民医院广州中医药大学第二附属医院

目的:评价中药复方制剂尿路清在体外抗奈瑟淋球菌的作用。方法:分别采用对淋球菌的体外抑制试验、抑菌时间观察试验、抑菌环试验,分别检测尿路清、八正散和壮观霉素的抗淋球菌作用。结果:对尿路清、八正散和壮观霉素进行比较,对淋球菌... 详细信息

目的:评价中药复方制剂尿路清在体外抗奈瑟淋球菌的作用。方法:分别采用对淋球菌的体外抑制试验、抑菌时间观察试验、抑菌环试验,分别检测尿路清、八正散和壮观霉素的抗淋球菌作用。结果:对尿路清、八正散和壮观霉素进行比较,对淋球菌的体外抑制试验:尿路清作用最强,体外对产青霉素酶的奈瑟淋球菌(PPNG)和非产青霉素酶的奈瑟淋球菌(NPPNG)均有明显抑制作用。给药浓度为1∶512(160mg/L)～1∶1024(820mg/L)时可抑制淋球菌生长;抑菌时间观察试验:尿路清高浓度能快速杀灭淋球菌,当浓度为7.81mg/mL时,30min可以对淋球菌有杀灭作用;当浓度为15.63mg/mL时,20min能杀灭淋球菌;浓度为31.25mg/mL时,10min即能杀灭淋球菌,而当浓度升为62.5mg/mL时,5min内即可杀灭淋球菌。抑菌环试验:尿路清对淋球菌的平均抑菌环为15～21mm,敏感菌株占63.63%,八正散平均抑菌环12～15mm,敏感菌株占54.55%。壮观霉素平均抑菌环为16～19mm,敏感菌株占72.72%。结论:尿路清有确切的体外抗淋球菌作用。

关键词：尿路清奈瑟淋球菌体外抗菌试验实验研究

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