-
Article
Presence of low-energy chlorophylls d in photosystem I trimer and monomer cores isolated from Acaryochloris sp. NBRC 102871
Acaryochloris species belong to a special category of cyanobacteria possessing chlorophyll (Chl) d. One of the photosynthetic characteristics of Acaryochloris marina MBIC11017 is that the absorption spectra of ph...
-
Article
Modified signal-to-noise ratio in the liver using the background-to-lung activity ratio to assess image quality of whole-body 18F-fluorodeoxyglucose positron emission tomography
The signal-to-noise ratio in the liver (SNR liver) is commonly used to assess the quality of positron emission tomography (PET) images; however, it is weakly correlated with visual assessments. Conversely, the...
-
Article
Beads phantom for evaluating heterogeneity of SUV on 18F-FDG PET images
This study aimed to develop a dedicated phantom using acrylic beads for texture analysis and to represent heterogeneous 18F-fluorodeoxyglucose (FDG) distributions in various acquisition periods.
-
Article
First observation of incomplete vertical circulation in Lake Biwa
Vertical circulation reaches the bottom of the deepest (> 90 m) part of the northern basin of Lake Biwa, a warm monomictic lake, during winter (January to March) every year. In winter 2019, we found non-circul...
-
Article
Development of a new high-throughput and small-size method for measuring sediment oxygen demand in lakes
Sediment oxygen demand (SOD) measurement currently requires a long preparation time and bulky experimental equipment, which represent major obstacles to conducting SOD measurements. We developed a new SOD meas...
-
Chapter and Conference Paper
A Study on Scale Construction of Adjective Pairs for Evaluating Audiovisual Effects in Video Games
The semantic differential (SD) method is widely used to quantify and measure the impressions given by stimuli such as words or images. To evaluate impressions using the SD method, it is necessary to construct ...
-
Article
Accuracy of metabolic volume and total glycolysis among six threshold-based target segmentation algorithms
This study aimed to evaluate the accuracy of six threshold-based segmentation methods with different target-to-background ratios (TBR), images with different voxel sizes and image noise, in measuring metabolic...
-
Article
Comparison of image quality between step-and-shoot and continuous bed motion techniques in whole-body 18F-fluorodeoxyglucose positron emission tomography with the same acquisition duration
This study aimed to compare the qualities of whole-body positron emission tomography (PET) images acquired by the step-and-shoot (SS) and continuous bed motion (CBM) techniques with approximately the same acqu...
-
Article
Open AccessThe Effect of Two Amino acid Residue Substitutions via RNA Editing on Dark-operative Protochlorophyllide Oxidoreductase in the Black Pine Chloroplasts
Dark-operative protochlorophyllide oxidoreductase (DPOR) is a key enzyme to produce chlorophyll in the dark. Among photosynthetic eukaryotes, all three subunits chlL, chlN, and chlB are encoded by plastid genomes...
-
Article
Open AccessRhodobacter sphaeroides mutants overexpressing chlorophyllide a oxidoreductase of Blastochloris viridis elucidate functions of enzymes in late bacteriochlorophyll biosynthetic pathways
In previous studies we have demonstrated that chlorophyllide a oxidoreductases (CORs) from bacteriochlorophyll (BChl) a-producing Rhodobacter species and BChl b-producing Blastochloris viridis show distinct subst...
-
Article
Open AccessFeasibility of deep-inspiration breath-hold PET/CT with short-time acquisition: detectability for pulmonary lesions compared with respiratory-gated PET/CT
Deep-inspiration breath-hold (DIBH) PET/CT with short-time acquisition and respiratory-gated (RG) PET/CT are performed for pulmonary lesions to reduce the respiratory motion artifacts, and to obtain more accur...
-
Article
Open AccessAn unexpectedly branched biosynthetic pathway for bacteriochlorophyll b capable of absorbing near-infrared light
Chlorophyllous pigments are essential for photosynthesis. Bacteriochlorophyll (BChl) b has the characteristic C8-ethylidene group and therefore is the sole naturally occurring pigment having an absorption maximum...
-
Chapter and Conference Paper
Functional Analysis of the Nitrogenase-Like Protochlorophyllide Reductase Encoded in Chloroplast Genome Using Cyanobacterium Leptolyngbya Boryana
Dark-operative protochlorophyllide (Pchlide) reductase (DPOR) is a nitrogenase-like enzyme consisting of two separable components, L-protein (a ChlL dimer) and NB-protein (a ChlN-ChlB heterotetramer), which ar...
-
Article
Functional expression of nitrogenase-like protochlorophyllide reductase from Rhodobacter capsulatus in Escherichia coli
Dark-operative protochlorophyllide oxidoreductase (DPOR) is a nitrogenase-like enzyme catalyzing D-ringreduction of protochlorophyllide in chlorophyll and bacteriochlorophyll biosynthesis. DPOR consists of two...
