Nagoya Institute of Technology

About: Nagoya Institute of Technology is a education organization based out in Nagoya, Japan. It is known for research contribution in the topics: Thin film & Catalysis. The organization has 10766 authors who have published 19140 publications receiving 255696 citations. The organization is also known as: Nagoya Kōgyō Daigaku & Nitech.

Photoreaction of the cysteine S-H group in the LOV2 domain of Adiantum phytochrome3.

Abstract: Phy3-LOV2 is the chromophore domain of a blue-light photoreceptor for tropic responses of plants. FMN is noncovalently bound to phy3-LOV2, and the protein structure is characteristic of the LOV (li...

Influence of strontium substitution on structure and crystallisation of Bioglass® 45S5

Abstract: The changes in the structure of 45S5 Bioglass® and its heat-treated versions upon SrO substitution were investigated by solid-state multinuclear magic angle spinning nuclear magnetic resonance (MAS-NMR), X-ray diffraction and differential scanning calorimetry. A series of the melt-derived glasses with SrO gradually substituted for calcium (0, 25, 50, 75 and 100%) on a molar basis was synthesised. The glass transition temperature, Tg, and crystallisation temperature decreased upon SrO substitution. Glasses with 75 and 100% of SrO substitution showed a minor crystalline phase. 31P MAS-NMR showed that phosphorus is present as orthophosphate in the entire glass series; 29Si MAS-NMR data showed a predominantly Q2 silicate network. A small step change in the position of the 31P and 29Si MAS-NMR signals found between the glasses with 25 and 50% of SrO substitution is attributed due to an increase in the ring-type fraction of the Q2 silicate glass over the mainly chain topology in the original 45S5 glass. On heat treatment combeite (Na2Ca2Si3O9) and combeite-type (Na2CaSi2O6) silicate phases were identified. For glasses with increasing SrO contents the equivalent Sr2+ substituted phases were formed (viz. Na2Sr2Si3O9 and Na2SrSi2O6) above 600 °C. The polymerisation degree of phosphorus increased and in addition to orthophosphate amorphous pyro- and meta-phosphate species were observed on heat treatment between 600 and 650 °C, the amount of which reduced with SrO substitution. Above 800 °C, changes in 31P MAS-NMR spectra suggested that several phosphate containing phases crystallised and the fraction of the remaining glass was below the detection limit. In contrast to the SrO containing glasses, in the original 45S5 composition a significant fraction of phosphorus remained amorphous even after heat treatment at temperatures above 800 °C.

Direct dehydration polycondensation of lactic acid catalyzed by water‐stable Lewis acids

Abstract: Poly(L-lactic acid) (PLLA) is generally produced by ring-opening polymerization of (S,S)-lactide, which is prepared from dehydration polycondensation of lactic acid and successive depolymerization. Results of this study show that scandium trifluoromethanesulfonate [Sc(OTf) 3 ] and scandium trifluoromethanesulfonimide [Sc(NTf 2 ) 3 ] are effective for one-step dehydration polycondensation of L-lactic acid. Bulk polycondensation of L-lactic acid was carried out at 130-170 °C to give PLLA with M n of 5.1 x 10 4 to 7.3 x 10 4 (yield 32-60%). The solution polycondensation was performed at 135 °C for 48 h to afford PLLA with M n of 1.1 x 10 4 with good yield (90%). In no case did 1 H NMR, specific optical rotation, or DSC measurement confirm racemizations. The catalyst was recovered easily by extraction with water and reused for polycondensation.

A new structure of 12Slot-10Pole field-excitation flux switching synchronous machine for hybrid electric vehicles

Abstract: This paper presents a new structure of 12Slot-10Pole field-excitation flux switching synchronous machine (FEFSSM) with all active parts namely field excitation coil (FEC) and armature coil are located on the stator, applied for hybrid electric vehicles (HEVs). The rotor part consists of single piece iron makes it more robust and becoming more suitable to apply for high speed motor drive system application coupled with reduction gear. The design target is the motor with a maximum torque of 210Nm with reduction gear ratio of 4:1, a maximum power of 123kW, a maximum power density more than 3.5kW/kg, and a maximum speed of 20, 000r/min with similar restrictions and specifications in IPMSM used for LEXUS RX400h. The deterministic design optimization approach is used to treat design parameters defined in rotor, armature and FEC repeatedly until the target performances are achieved, under maximum current density 21A/mm2 for both armature and FEC. A result shows that the proposed design enables to keep the same power density in existing IPMSM installed on a commercial SUV-HEV.