A5103100317- Light effects on plants
- Photosynthetic Processes and Mechanisms
- Plant Molecular Biology Research
- CCD and CMOS Imaging Sensors
- Analytical Chemistry and Sensors
- Plant Stress Responses and Tolerance
- Plant tissue culture and regeneration
- Plant nutrient uptake and metabolism
- Advanced Memory and Neural Computing
- Growth and nutrition in plants
- Mitochondrial Function and Pathology
- Aeroelasticity and Vibration Control
- Plant and Biological Electrophysiology Studies
- Photoreceptor and optogenetics research
- Plant responses to elevated CO2
- Leaf Properties and Growth Measurement
- Algal biology and biofuel production
- Copper Interconnects and Reliability
- Electronic Packaging and Soldering Technologies
- Plant Gene Expression Analysis
- Plant Pathogens and Fungal Diseases
- Image Processing Techniques and Applications
- Hand Gesture Recognition Systems
- Enzyme Structure and Function
- 3D IC and TSV technologies
Panasonic (Japan)
2015-2019
Sensors (United States)
2018
Tokyo University of Science
2000-2010
Ritsumeikan University
2000-2010
Sanyo (Japan)
2007-2010
Toho University
2010
Yamagata University
2008
Iwate University
2008
Tokyo Metropolitan University
2008
RIKEN Center for Sustainable Resource Science
2008
Abstract Germination of lettuce (Lactuca sativa L.) seed is regulated by phytochrome. The requirement for red light circumvented the application gibberellin (GA). We have previously shown that endogenous content GA1, main bioactive GA in seeds, increases after red-light treatment. To clarify which step GA1synthesis phytochrome, cDNAs encoding 20-oxidases (Ls20ox1 and Ls20ox2, L. GA20-oxidase) 3β-hydroxylases (Ls3h1 Ls3h2 GA3β-hydroxylase) were isolated from seeds reverse-transcription...
Abstract A computer‐operated spectrograph was recently built at Okazaki, Japan. Different specimens can be placed on a horseshoe‐shaped focal curve (10 m long) covering wavelength range of 250 to 1000 nm so they irradiated simultaneously. The linear dispersion is about 0.8 nm/cm. photon fluence rate the 5 x 10 15 . photons cm ‐2 s ‐1 300nm and 1 16 600 900 nm. spectral half width 5.5 or less curve. stray light content ‐5 main peak ± 100 Specimens are set in microcomputer‐controlled threshold...
Dehydroascorbate reductase (DHAR) is a key component of the ascorbate recycling system. Three functional DHAR genes are encoded in Arabidopsis genome. Ozone exposure increased expression cytosolic (cytDHAR) gene alone. We characterized an mutant with deficient cytDHAR. The completely lacked cytDHAR activity and was highly ozone sensitive. amounts total glutathione were similar both lines, but amount apoplastic 61.5% lower. These results indicate that ascorbate, which generated through...
Germination of lettuce (Lactuca sativa) 'Grand Rapids' seeds is regulated by phytochrome. The action phytochrome includes alterations in the levels gibberellin (GA) and abscisic acid (ABA). To determine molecular mechanism regulation ABA metabolism, we isolated four cDNAs encoding 9-cis-epoxycarotenoid dioxygenase (biosynthesis; LsNCED1–LsNCED4) for 8′-hydroxylase (catabolism; LsABA8ox1–LsABA8ox4). Measurements its catabolites showed that a decrease level coincided with slight increase...
The phototransformation of undegraded pea phytochrome, which was estimated to be about 30 40% pure, from its red-light-absorbing form far-red-light-absorbing examined at 2–4°C after laser flash excitation 655 nm using a custom-designed multichannel transient spactra analyzer. A difference spectrum measured 10 μsec the showed an absorbance increase 692 nm, decrease 660 and slight 604 nm. With time in darkness, peak gradually decreased magnitude shifted 695 decay curve between 500 could...
Regulatory effects of light on senescence rice leaves were investigated by measuring degradation chlorophyll and proteins in leaf segments which had been kept the dark or under illumination with different intensities colors. When left total darkness for three days at 30°C, there was an initial long lag that lasted one whole day then rapidly degraded second third days. Breakdown strongly retarded continuous white intensity as low 0.5 μmol photons m−2 s−1 but effect decreased above 10 s−2. The...
Transverse cortical microtubule (CMT) arrays in lettuce root epidermal cells randomize soon after a shift from pH 6.0 to 4.0, and this randomization is essential for hair initiation. We investigated the hormonal regulation of CMT randomization. At 1 µM auxin competitive inhibitor 2-(p-chlorophenoxy)-2-methylpropionic acid (PCIB), 0.1 ethylene biosynthesis aminoethoxyvinylglycine (AVG) or action Ag+ suppressed 6.0, addition indole-3-acetic (IAA) precursor 1-aminocyclopropane-1-carboxylic...
Phytochrome regulates lettuce (Lactuca sativa L. cv. Grand Rapids) seed germination via the control of endogenous level bioactive gibberellin (GA). In addition to previously identified LsGA20ox1, LsGA20ox2, LsGA3ox1, LsGA3ox2, LsGA2ox1, and LsGA2ox2, five cDNAs were isolated from seeds: LsCPS, LsKS, LsKO1, LsKO2, LsKAO. Using an Escherichia coli expression system functional assays, it is shown that LsCPS LsKS encode ent-copalyl diphosphate synthase ent-kaurene synthase, respectively. a...
Image sensors are increasingly becoming key devices for various applications (in-vehicle, surveillance, medical, and so on). To realize the best possible imaging sensing performance, there is growing demand extended dynamic range that can precisely reproduce color tone. Several conventional papers have described methods enhancing range, such as multiple exposures in a frame [1] lateral overflow integration capacitor [2,3]. However, all these techniques 100-to-200dB by synthesizing exposures,...
We have investigated a photosensor that consists of field emission transistor (FET) utilizing the biocomponent photosystem I (PSI) protein complex for use in an imaging device. The PSI was immobilized on gold electrode via self-assembling monolayer (SAM) 3-mercapto-1-propanesulfonic acid sodium salt to obtain PSI-modified electrode. As electrode, basic photoresponses originating from excitation PSI, including photocurrent (106 nA) and photoresponse open-circuit voltage (photo-Voc: 28.6 mV),...
There is a growing demand for high-resolution and high-reality cameras use in broadcasting, surveillance, various other systems. Conventional papers report on research development of 8K ultra-high-definition television (UHDTV) systems, full-resolution [1], 240fps that employ stacked sensors [2]. In these camera rolling-shutter method used scanning, since global-shutter has an area tradeoff between the photoelectric conversion region charge storage [3-5]. However, this leads to shutter...
We have developed organic photoconductive film (OPF) CMOS image sensors with pixel structures different from those of a conventional silicon sensors, in which, the thin for photoelectric conversion and charge storage part signal accumulation are completely independent. In this paper, we focus on two unique features OPF sensor: (1) technology that realizes over 120 dB simultaneous-capture wide dynamic range, (2) global shutter achieving high saturation signals per unit square is 10 higher...
The extrinsic 33-kDa protein of photosystem II (PSII) was modified with various reagents, and the resulting proteins were checked for ability to rebind PSII reactivate oxygen evolution. While modification more than eight carboxyl groups aspartyl glutamyl residues glycine methyl ester did not affect rebinding reactivating capabilities, amino lysyl either N-succinimidyl propionate or 2,4,6-trinitrobenzene sulfonic acid guanidino arginyl 2,3-butanedione resulted in a loss capabilities protein....
Gibberellin (GA) plays an important role in the induction of germination photoblastic lettuce (Lactuca sativa L. cv. Grand Rapids) seeds. We have previously shown that gene expression a GA 3-oxidase (Ls3h1) increased after red light treatment, resulting increase endogenous content GA1, bioactive GA. Since metabolism GAs is also for determining levels GAs, cDNAs encoding 2-oxidases (LsGA2ox1 and LsGA2ox2, 2-oxidase), which catalyze deactivation were isolated from seeds to investigate...
Organic photoconductive film (OPF) image sensor is the strong candidate to extend application and create new world. This paper introduces charge generation extraction operation in OPF sensor. By spatial temporal control of electric field OPF, high speed global shutter sub-micron pixel, electrical iris without ND filter, phase difference detective autofocusing are demonstrated.
Root hairs, which arise from root epidermal cells, are tubular structures that increase the efficiency of water absorption and nutrient uptake. A low pH (pH 4) medium induced hair formation in lettuce (Lactuca sativa L.) seedlings, decapitation shoots inhibited formation. The addition shoot extract to restored decapitated seedlings. These results suggest factors essential hairs may be present shoot. We purified one factor facilitates This was identified as chlorogenic acid (CGA), a common...
To elucidate the domains on extrinsic 23 kDa protein involved in electrostatic interaction with 33 spinach photosystem II, we modified amino or carboxyl groups of to uncharged methyl ester N-succinimidyl propionate glycine presence a water-soluble carbodiimide, respectively. The propionate-modified did not bind associated PSII membranes, whereas ester-modified completely bound. This indicates that positive charges are important for membranes. Mapping sites was performed using Staphylococcus...
We realized a simultaneous-capture wide-dynamic-range image sensor with 3.0 μm pixels using novel in-pixel 3D capacitors located in BEOL. achieved high capacitance density of 41.7 fF/μm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> and low leakage current 3.6×10 xmlns:xlink="http://www.w3.org/1999/xlink">-10</sup> A/cm at 1 V by applying structure optimizing dielectric deposition process. TDDB investigations showed that estimated...
Image sensors for applications such as machine vision, in-vehicle cameras, and surveillance cameras require a global shutter (GS) function. GS functions are an increasingly powerful technology driver, not only solving imaging problems caused by rolling distortion or flash bands, but also use in sensing [1]. Conventional CMOS image (CIS) with storage located near the photoelectric conversion area [2-3], two-stage transferring pixel structures required to suppress kT/C noise need two nodes...
This paper describes an RGB-infrared (IR) organic CMOS image sensor with electrically controllable IR sensitivity. The sensitivities of all the pixels in sensor, which has structure two directly stacked layers a high resistance ratio, are simultaneously controlled by changing applied voltage to films. fabricated pixel pitch 3 μm, 2.1 Mpixels (1920 × 1080) both RGB and regions. can switch between color imaging modes frame without requiring mechanically retractable IR-cut filter.