Superior low temperature activity over α-MnO/β-MnOOH catalyst for selective catalytic reduction of NO with ammonia.

Manganese octahedral molecular sieves with an α-MnO crystal structure (OMS-2) and their related materials have attracted significant attention for the selective catalytic reduction of NO using NH (NH-SCR) at low temperatures. Further lowering their operating temperature should be an effective method to develop an environmentally friendly de-NO system; however, their catalytic activity at low temperatures, especially below 100 °C, remains poor. This study describes a post-synthetic approach to develop Mn-based catalysts superior to those in the literature that operate at ultralow temperatures.

Unexpected Low Temperature Activity with Low N O Emission of Stabilized Al-rich Zeolite Beta for Selective Catalytic Reduction of NO.

The low temperature activity of Fe-loaded zeolites as selective catalytic reduction of NO by NH (NH -SCR) catalysts is a critical drawback for practical application. Here, we found unexpected improvement of low temperature activity by our proposed post-synthetic treatment. An Al-rich zeolite beta (Si/Al=5) is employed as the catalyst support, and the parent sample is dealuminated for higher hydrothermal stability, followed by the liquid-mediated stabilization treatment and impregnation.

Interlaboratory testing for the determination of trace amounts of tin and lead in magnesium and magnesium alloys by inductively coupled plasma atomic emission spectrometry.

In order to establish a standard analytical method for the determination of trace amounts of tin and lead in magnesium and its alloys, which could be found in neither JIS nor ISO standards, an interlaboratory testing with inductively coupled plasma atomic emission spectrometry (ICP-AES) has been put into practice. Simple dissolution with nitric and hydrochloric acids and sample nebulization procedures were finally concluded to be suitable for standardization. The analytical methods, proposed in this study have been provided as newly established JIS standards.

Growth arrest associated with 12-o-tetradecanoylphorbol-13-acetate-induced hematopoietic differentiation with a defective retinoblastoma tumor suppressor-mediated pathway.

The retinoblastoma tumor suppressor (Rb) gene product plays an essential role in cell-cycle regulation. However, its role in terminal differentiation of hematopoietic cells is speculative. Here we show a model of 12-o-tetradecanoylphorbol-13-acetate (TPA)-induced hematopoietic differentiation and growth arrest with a defective Rb-mediated pathway.

[Pulsatile diameter change of coronary artery lumen estimated by intravascular ultrasound].

To analyze the pulsatile movement of coronary arterial walls, intravascular ultrasound was used to measure the diameter changes in the arterial lumen of 32 patients with coronary artery disease (CAD group) and five patients with chest pain but no CAD (control group). Measurements were performed on segments of the proximal left anterior descending coronary artery that were angiographically nonstenotic. Following identification of the peak systolic and end-diastolic phases using intra-coronary pressure tracings, the luminal diameters were measured around the center at 4 degrees intervals using a computer-assisted image analyzer.

Oncogenic collaboration of the cyclin D1 (PRAD1, bcl-1) gene with a mutated p53 and an activated ras oncogene in neoplastic transformation.

Cyclin D1 is one of the key regulators in G1 progression in the cell cycle and is also a candidate oncogene (termed PRAD1 or bcl-1) in several types of human tumors. We report a collaboration of the cyclin D1 gene with ras and a mutated form of p53 (p53-mt) in neoplastic transformation. Transfection of cyclin D1 alone or in combination with ras or with p53-mt was not sufficient for focus formation of rat embryonic fibroblasts.

Epidemiological survey of dementia and depression among the aged living in the community in Japan.

The authors surveyed the prevalence of depression and dementia in the elderly in Ohira town in Japan from 1989 to 1990. The total population of this town was 26,712, with 2,778 people aged 65 and above, constituting 10.4% of the total population.

[Exercise in elderly NIDDM].

The clinical evaluation of exercise in elderly NIDDM was investigated with the following. Based on the questionnares filled in by 508 patients with NIDDM regarding whether they had regular exercise for treatment of diabetes mellitus or not, 53.4% and 41.

Arteriovenous malformation with crossed total hemiatrophy: a case report.

A case of crossed total hemiatrophy (right side of the face, and left side of the trunk and left extremities) with a right precentral to central arteriovenous malformation is reported. The atrophy of trunk and extremities was well accounted for by the contralateral arteriovenous malformation, but a pathological early auditory response was the only brainstem sign possibly related to the facial atrophy.