نتایج جستجو برای: chlorophyll spad

تعداد نتایج: 21888  

2015
Pervez Haider Zaidi Zerka Rashid Madhumal Thayil Vinayan Gustavo Dias Almeida Ramesh Kumar Phagna Raman Babu

Waterlogging is an important abiotic stress constraint that causes significant yield losses in maize grown throughout south and south-east Asia due to erratic rainfall patterns. The most economic option to offset the damage caused by waterlogging is to genetically incorporate tolerance in cultivars that are grown widely in the target agro-ecologies. We assessed the genetic variation in a popula...

Journal: :Remote Sensing 2014
Miguel Quemada Jose Luis Gabriel Pablo J. Zarco-Tejada

Estimating crop nitrogen (N) status with sensors can be useful to adjust fertilizer levels to crop requirements, reducing farmers’ costs and N losses to the environment. In this study, we evaluated the potential of hyperspectral indices obtained from field data and airborne imagery for developing N fertilizer recommendations in maize (Zea mays L.). Measurements were taken in a randomized field ...

Hamid Adel Mahmoodabad Morad Shaban, Reza Ashrafi Parchin Saeed Hokmalipoor

Essential oils from aerial parts of Mentha spicata, was obtained by steam destillation using a Clevenger-type system. These oils were screened for antibacterial and anti-Candida albicans activity using bioautographic method. A fiel experiments was laid out in agricultural research farm, city Namin, Ardabil province, Iran in 2013. Experiment was conducted in a randomized complete block with seve...

Journal: :Optics express 2015
Myung-Jae Lee Pengfei Sun Edoardo Charbon

This paper reports on the first implementation of a single-photon avalanche diode (SPAD) in standard silicon on insulator (SOI) complementary metal-oxide-semiconductor (CMOS) technology. The SPAD is realized in a circular shape, and it is based on a P(+)/N-well junction along with a P-well guard-ring structure formed by lateral diffusion of two closely spaced N-well regions. The SPAD electric-f...

2004
Michael R. Schlemmer Dennis D. Francis James S. Schepers M. R. Schlemmer

A plant’s photosynthetic potential is directly proportional to the quantity of chlorophyll present in the leaf Measuring a crop’s physiological parameters provides information tissue. Rapid estimates of photosynthetic potential can for interpreting its response to the environment. Remote sensing is quickly becoming recognized as a valuable tool that has the potential be important for studies of...

ژورنال: علوم آب و خاک 2002
یحیی پرویزی, , عبدالمجید رونقی, , نجف ‌علی کریمیان, ,

Nitrogen is usually the most limiting nutrient for crop production. Manganese deficiency in some calcareous soils of Iran has been reported. The objective of this study was to evaluate the effect of N and Mn on the growth and chemical composition of spinach (Spinacia oleracea L.) under greenhouse conditions. The experiment was conducted in a soil from Chitgar series (Fine-loamy, carbonatic, the...

یحیی پرویزی, , عبدالمجید رونقی, , نجف ‌علی کریمیان, ,

Nitrogen is usually the most limiting nutrient for crop production. Manganese deficiency in some calcareous soils of Iran has been reported. The objective of this study was to evaluate the effect of N and Mn on the growth and chemical composition of spinach (Spinacia oleracea L.) under greenhouse conditions. The experiment was conducted in a soil from Chitgar series (Fine-loamy, carbonatic, the...

Journal: :Journal of bacteriology 2006
Andrew H Gaspar Hung Ton-That

Different surface organelles contribute to specific interactions of a pathogen with host tissues or infectious partners. Multiple pilus gene clusters potentially encoding different surface structures have been identified in several gram-positive bacterial genomes sequenced to date, including actinomycetales, clostridia, corynebacteria, and streptococci. Corynebacterium diphtheriae has been show...

2016
Isamu Takai Hiroyuki Matsubara Mineki Soga Mitsuhiko Ohta Masaru Ogawa Tatsuya Yamashita

A single-photon avalanche diode (SPAD) with enhanced near-infrared (NIR) sensitivity has been developed, based on 0.18 μm CMOS technology, for use in future automotive light detection and ranging (LIDAR) systems. The newly proposed SPAD operating in Geiger mode achieves a high NIR photon detection efficiency (PDE) without compromising the fill factor (FF) and a low breakdown voltage of approxim...

Journal: :Optics express 2017
Tianqi Mao Zhaocheng Wang Qi Wang

Single-photon avalanche diode (SPAD) is a promising photosensor because of its high sensitivity to optical signals in weak illuminance environment. Recently, it has drawn much attention from researchers in visible light communications (VLC). However, existing literature only deals with the simplified channel model, which only considers the effects of Poisson noise introduced by SPAD, but neglec...

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