نتایج جستجو برای: photosynthesis efficiency index

تعداد نتایج: 785809  

Journal: :Agronomy 2021

Climate change poses a significant threat to agricultural production in the tropics, yet relatively little research has been carried out understand its impact on mature tropical tree crops. This aims genotypic variation growth and photosynthesis cacao trees response elevated CO2 water deficit. Six genotypes were grown under greenhouse conditions at ambient (ca. 437 ppm) 724 well-watered deficit...

Journal: :Remote Sensing 2017
Siheng Wang Lifu Zhang Changping Huang Na Qiao

Remote sensing of high-latitude forests phenology is essential for understanding the global carbon cycle and the response of vegetation to climate change. The normalized difference vegetation index (NDVI) has long been used to study boreal evergreen needleleaf forests (ENF) and deciduous broadleaf forests. However, the NDVI-based growing season is generally reported to be longer than that based...

Journal: :Science 1949
D Burk S Hendricks M Korzenovsky V Schocken O Warburg

239 Elastomers and plastomers: their chemistry, physics, and technology. (Vol. III.) R. Houwink, Ed. Reviewed by H. Mark 239 Foundations of nuclear physics: faesimilies of thirteen original studies: Robert T. Beyer, Ed. Reviewed by Karl Lark-Hororitz 239 Advances in catalysis and related subjcets: XV. G. Frankenburg, V. I. Komaiclrewsly, and E. K. Rideal, Eds. Reviewed by Henry Eyring 2.40 Deta...

2015
E. Bene

Our sowing date experiment took place in the Demonstration Garden of Institution of Plant Sciences, Centre for Agricultural Sciences of University of Debrecen, in 2012-2014. The paper contains data of test year 2014. Our purpose, besides several other examinations, was to observe how sowing date influences the leaf area index and the activity of photosynthesis of maize hybrids, and how those fa...

Silicon is a chemical element that has many positive effects on some qualitative and quantitative characteristics of many plant species such as ornamental plants. The aim of this research was to investigate the impact of silicon spray on growth and photosynthetic characteristics of chrysanthemum. This study was performed as a factorial completely randomized design with 2 factors: silicon source...

Journal: :Journal of experimental botany 2013
Steven M Driever Johannes Kromdijk

Sustainably feeding the world's growing population in future is a great challenge and can be achieved only by increasing yield per unit land surface. Efficiency of light interception and biomass partitioning into harvestable parts (harvest index) has been improved substantially via plant breeding in modern crops. The conversion efficiency of intercepted light into biomass still holds promise fo...

2017
Mads Lichtenberg Kasper E. Brodersen Michael Kühl

We investigated the radiative energy budgets of a heterogeneous photosynthetic coral reef sediment and a compact uniform cyanobacterial biofilm on top of coastal sediment. By combining electrochemical, thermocouple and fiber-optic microsensor measurements of O2, temperature and light, we could calculate the proportion of the absorbed light energy that was either dissipated as heat or conserved ...

Regarding the differences between shoot and root optimum growth temperature and the impress of temperature on root function specially nutrient absorption this study was aimed to investigate the effect of low root temperature with three nitrogen levels in lettuce. The experiment was conducted in factorial completely randomized trial design with five replication. Treatments were used including th...

2011
Tessa R. Calhoun Graham R. Fleming

The initial steps of photosynthesis require the absorption and subsequent transfer of energy through an intricate network of pigment–protein complexes. Held within the protein scaffold of these complexes, chromophore molecules are densely packed and fixed in specific geometries relative to one another resulting in Coulombic coupling. Excitation energy transfer through these systems can be accom...

Journal: :medical journal of islamic republic of iran 0
bahram nabilou social determinants of health research center, urmia university of medical sciences, urmia, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی ارومیه (urmia university of medical sciences) hassan yusefzadeh department of public health, school of public health, urmia university of medical sciences, urmia, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی ارومیه (urmia university of medical sciences) aziz rezapour school of health management and information sciences and health management and economics research center, iran university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences) farbod ebadi fard azar department of public health, school of public health, iran university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences) parviz salem safi department of public health, school of public health, urmia university of medical sciences, urmia, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی ارومیه (urmia university of medical sciences) ali sarabi asiabar health management and economics research center, iran university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences)

background: due to the increasing health care costs, the issue of productivity in hospitals must be taken into great consideration in order to provide, preserve and promote public health services. thus, increasing the level of productivity must become the main aim of any hospital. objective of this study is to determine the total factor productivity and its components over the period under the ...

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