نتایج جستجو برای: gpp

تعداد نتایج: 1505  

2014
Hao Yan Shao-qiang Wang Dave Billesbach Walter Oechel Gil Bohrer Tilden Meyers Timothy A. Martin Roser Matamala Richard P. Phillips Faiz Rahman Qin Yu Herman H. Shugart

Accurate simulation of terrestrial gross primary production (GPP), the largest global carbon flux, benefits our understanding of carbon cycle and its source of variation. This paper presents a novel light use efficiency-based GPP model called the terrestrial ecosystem carbon flux model (TEC) driven by MODIS FPAR and climate data coupled with a precipitation-driven evapotranspiration (E) model (...

Journal: :Remote Sensing 2014
Zhengjia Liu Lunche Wang Sisi Wang

Accurate quantification of gross primary production (GPP) at regional and global scales is essential for carbon budgets and climate change studies. Five models, the vegetation photosynthesis model (VPM), the temperature and greenness model (TG), the alpine vegetation model (AVM), the greenness and radiation model (GR), and the MOD17 algorithm, were tested and calibrated at eight sites in China ...

2015
Catherine E. Lovelock Lisa J. Duckett Ilka C. Feller Mark E. Harmon

There are few detailed carbon (C) budgets of mangrove forests, yet these are important for understanding C sequestration in mangrove forests, how they support the productivity of the coast and their vulnerability to environmental change. Here, we develop C budgets for mangroves on the islands of Twin Cays, Belize. We consider seaward fringing forests and interior scrub forests that have been fe...

2016
Manuel John Albert Vincent Olubunmi Rotimi Jamshed Iqbal Wassim Chehadeh

OBJECTIVE To evaluate the utility of the Luminex xTAG gastrointestinal pathogen panel (GPP) assay in the detection of enteric pathogens from diarrheal stool samples in Kuwait. MATERIALS AND METHODS The Luminex xTAG GPP assay was used according to the manufacturer's instructions to evaluate single diarrheal stool samples from 109 hospitalized patients at Mubarak Al-Kabeer Hospital, Kuwait, fro...

2018
Beliz Özen Y Özay Özdemir E Emrem Beştepe

Objective Causes such as childhood trauma, negative attitude about sexuality, inadequate sexual knowledge and education, relationship problems, and unconscious motivation are reported about psychosexual development in the etiology of genito-pelvic pain/penetration disorder (GPP/PD). There are few studies that focus directly on research etiology of GPP/PD and use structured scales. The aim of th...

Journal: :Remote Sensing 2022

Alpine meadow ecosystems are extremely vulnerable to climate change and serve an essential function in terrestrial carbon sinks. Accurately estimating their gross primary productivity (GPP) is for understanding the global cycle. Solar-induced chlorophyll fluorescence (SIF), as a companion product directly related plant photosynthesis process, has become attractive pathway GPP accurately. To dat...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 1984
S M Lambert S R Childers

Guanine nucleotides regulate binding of opiate agonists to membrane receptors by increasing agonist dissociation rates. The current study demonstrates that the ability of guanosine 5'-triphosphate (GTP) and its nonhydrolyzable analogue guanylyl-5'-imidodiphosphate (Gpp(NH)p) to inhibit opiate agonist binding to rat brain membranes can be altered by two methods: by preincubating with EDTA, and b...

2014
Dan Liu Wenwen Cai Jiangzhou Xia Wenjie Dong Guangsheng Zhou Yang Chen Haicheng Zhang Wenping Yuan

Gross Primary Production (GPP) is the largest flux in the global carbon cycle. However, large uncertainties in current global estimations persist. In this study, we examined the performance of a process-based model (Integrated BIosphere Simulator, IBIS) at 62 eddy covariance sites around the world. Our results indicated that the IBIS model explained 60% of the observed variation in daily GPP at...

2014
David M. Hudson Rachel Werther MaryAnn Weis Jiann-Jiu Wu David R. Eyre

Approximately half the proline residues in fibrillar collagen are hydroxylated. The predominant form is 4-hydroxyproline, which helps fold and stabilize the triple helix. A minor form, 3-hydroxyproline, still has no clear function. Using peptide mass spectrometry, we recently revealed several previously unknown molecular sites of 3-hydroxyproline in fibrillar collagen chains. In fibril-forming ...

Journal: :Global change biology 2017
Hualei Yang Xi Yang Yongguang Zhang Mary A Heskel Xiaoliang Lu J William Munger Shucun Sun Jianwu Tang

Accurate estimation of terrestrial gross primary productivity (GPP) remains a challenge despite its importance in the global carbon cycle. Chlorophyll fluorescence (ChlF) has been recently adopted to understand photosynthesis and its response to the environment, particularly with remote sensing data. However, it remains unclear how ChlF and photosynthesis are linked at different spatial scales ...

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