نتایج جستجو برای: nbr

تعداد نتایج: 866  

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد شاهرود - دانشکده مهندسی شیمی 1392

یکی از پرکاربردترین الاستومرها، لاستیک نیتریل بوتادین (nbr ) در صنعت است. برای توسعه و افزایش کاربردهای این لاستیک ، استفاده از ترکیب های پلیمری و تولید ترموپلاستیک الاستومرها یکی از روش های بهبود خواص مکانیکی و تولید محصولات جدید با کیفیت مناسب می باشد. علاوه بر این استفاده از نانو ذرات خاک رس می تواند در خواص کامپوزیت تاثیر گذار باشد. در این پروژه ، هدف ما بررسی بهبود ویژگی های ترموپلاستیک ...

Journal: :Revista Latinoamericana de Difusión Científica 2022

l objetivo fue comparar la altura de planta y producción brotes en pitahaya (Hylocereus sp.) cv. Orejona su relación con las variables climáticas dos sitios Costa Rica. El ensayo se realizó San Mateo, Alajuela, Santa Cruz, Guanacaste, febrero 2017 a noviembre 2019. Las evaluadas fueron: (AP, cm), número vegetativos (NBV), reproductivos (NBR), precipitación pluvial (P, mm), humedad relativa (HR,...

Journal: :International Journal of Digital Earth 2021

Monitoring and classifying disturbed forests can provide information support for not only sustainable forest management but also global carbon sequestration assessments. In this study, we propose an autoencoder-based model disturbance detection, which considers disturbances as anomalous events in temporal trajectories. The autoencoder network is established trained to reconstruct intact Then, t...

Journal: :Turkish journal of geosciences 2022

Fires are considered a threat to the world with all its components and sectors. Recently, it is noticeable an increase in these fires that hit many countries, especially Lebanon which country rich forests. A forest fire can be naturally caused by either global warming or high temperature. On other hand, may man-made via factories glass waste. cause great damage environment lead human death. Unf...

Journal: :Tecnología en Marcha 2023

El objetivo fue comparar la altura de planta y producción brotes en pitahaya (Hylocereus sp.), su relación con las variables climáticas, variedades San Ignacio Amarilla. ensayo se realizó Mateo, Alajuela, Costa Rica, febrero 2017 a diciembre 2019. Las evaluadas fueron: (AP, cm), número vegetativos (NBV), reproductivos (NBR), precipitación pluvial (P, mm), humedad relativa (HR, %), temperatura p...

2013
Miriam del Socorro Herrera Carlo Eduardo Medina-Solis Mirna Minaya-Sánchez América Patricia Pontigo-Loyola Juan José Villalobos-Rodelo Horacio Islas-Granillo Rubén de la Rosa-Santillana Gerardo Maupomé

BACKGROUND Our study aimed to evaluate the effect of various risk indicators for dental caries on primary teeth of Nicaraguan children (from Leon, Nicaragua) ages 6 to 9, using the negative binomial regression model. MATERIAL/METHODS A cross-sectional study was carried out to collect clinical, demographic, socioeconomic, and behavioral data from 794 schoolchildren ages 6 to 9 years, randomly ...

Journal: :Journal of applied physiology 2016
Elizabeth J Simpson Tadej Debevec Ola Eiken Igor Mekjavic Ian A Macdonald

PlanHab is a planetary habitat simulation study. The atmosphere within future space habitats is anticipated to have reduced Po2, but information is scarce as to how physiological systems may respond to combined exposure to moderate hypoxia and reduced gravity. This study investigated, using a randomized-crossover design, how insulin sensitivity, glucose tolerance, and circulating lipids were af...

Journal: :Knowledge engineering and data science 2022

Damage to specimen collections occurs in practically every herbarium across the world. Hence, some precautions must be taken, such as investigating factors that cause damage their and evaluating collection handling usage policy. However, manual investigation of causes requires a lot effort time. Only few studies have attempted investigate damage. So far, non-gaussian approach detecting specimen...

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