Synthese und biochemisches Verhalten von Idebenon und verwandten Verbindungen

Syntheses of some metabolites of ubiquinone and of related compounds are described. Idebenone (QSA-10), a methyl-dimethoxy-benzoquinone bearing an omega-hydroxydecyl side chain in 3-position, restored the oxidation of succinate and of NADH in ubiquinone-depleted mitochondrial preparations and showed a stabilizing effect on lysosomal membranes and an inhibitory effect on cAMP-phosphodiesterase. It inhibited lipid peroxidation in canine brain mitochondria and in microsomes from canine brain and rat liver. Administered orally to rats, it increased the respiratory control index for glutamate and succinate oxidation but had no effect on the ADP/O2 ratio. Pharmacological effects of idebenon are also briefly discussed.     

EMF effects on microcirculatory system

Authors review the importance of studying the effects of electromagnetic fields (EMF) on microcirculatory system, especially in respect of possibility that vasculature may have direct and indirect role in interaction of static magnetic fields (SMF). We outline the physiological importance of microcirculation and relatively new methods of evaluation technique in vivo and explain in details the local and/or whole body exposure effects of SMF with␣range of 0.3–180 mT, power frequency EMF with range of 0.1–30 mT and microwaves at 1.5 GHz with range 0.08–8 W/kg brain average specific absorption rate (SAR) on microcirculatory systems in different tissues in experimental animals.     

Japanese carbon storage in materials

The NEAT model (Nonenergy-use Emission Accounting Tables) has been developed in order to estimate CO2 emissions caused by so-called nonenergy use of fossil fuels. The model is based on material flow accounting. The model has been applied to a number of countries in order to validate and improve its use. This paper discusses the case study for Japan. The NEAT analysis suggests that emissions in 1996 were 23 Mt higher than previously estimated based on the guidelines of the Intergovernmental Panel on Climate Change (IPCC). This quantity equals 1.9% of the total Japanese greenhouse gas emission. It is recommended to adjust the Japanese emission accounting practice and to apply more detailed emission estimation methods in future years. Given similar results for other countries it is also recommended to improve the IPCC guidelines.     

Investing in safety an analytical precautionary principle

PROBLEM: Governments and businesses must respond to increasing safety requirements and balance the associated costs with productivity and competing pressures. METHOD: A real options approach has been introduced for decision making in the private sector; this approach is adapted for regulatory decisions that can involve irreversible and uncertain safety impacts, social costs that differ from private costs, and differences in perception among the stakeholders. RESULT AND IMPACT ON INDUSTRY AND GOVERNMENT: The outcome is an economic decision gage that determines if it is optimal to invest in safety even if the estimated costs significantly exceed the estimated benefits. Applications potentially include safety decisions related to aviation, ground transportation, pipelines, nuclear facilities, natural disaster planning, and terrorism, among others.     

Adsorption removal of pollutants by active cokes produced from sludge in the energy recycle process of wastes

This study proposes a recycling system of sludge into active cokes and the fundamental examinations for the application were carried out. In the system, active cokes were produced by carbonizing pellets of sludge in a steam stream. Pyrolysis gas yielded by carbonization can be available to a fuel for a steam generation boiler. The exhaust heat from the boiler is used sequentially for drying of sludge. The active cokes are applied to the adsorbent for dioxin removal in exhaust gas from incinerators of wastes, or for purification of gas obtained in a gasification process of wastes, particularly removal of H2S. The used adsorbent is not recycled, but incinerated in the furnace without a desorption process to decompose adsorbed dioxin or to oxidize H2S for a sequential desulfurization process of SO2. Dry pellets of sludge were carbonized in a quartz tube reactor under various atmospheres. The micro pore structure and the adsorption performance of the cokes produced without activation process were examined. The micro pore structure was influenced by the temperature, the sort of flow gas (N2, CO2 and steam) and carbonization time, and the active cokes produced under the condition of the temperature 823 K for 60 min in the steam atmosphere had a largest specific surface area in the diameter less than 5 nm. The amount of benzene adsorption as an alternative substance of dioxin into the active cokes had a similar quality to a commercial active char produced from coal if it was evaluated by adsorption per a unit specific surface area. This fundamental knowledge must be reflected to an optimum design for development of a simple continuous process to produce the active cokes by a fluidized bed type of the carbonization furnace.     

壬基酚聚氧乙烯醚在MBR 与CASR 中的行为

对比研究了壬基酚聚氧乙烯醚(NPnEO, n 为1~4)在膜-生物反应器(MBR)和传统活性污泥反应器(CASR)中的去除效果和迁移行为.结果表明,在相同NPnEO 污泥负荷的条件下,采用不主动排泥的运行模式,2 种反应器均能有效去除NPnEO,去除率分别为99.2%和97.1%,MBR 的去除效果更稳定.前21d 中,2 种反应器中混合液NPnEO 浓度均呈现先增大后减小的趋势,但MBR 出水NPnEO 浓度小于其混合液浓度,而CASR 出水浓度则高于其混合液浓度;21d 后,2 种反应器混合液与出水浓度均趋于一致.活性污泥对NPnEO 具有吸附作用,但对去除NPnEO 的贡献很小;推测生物降解是去除NPnEO 的主导作用.     

Efficient depolymerization and chemical conversion of polyamide 66 to 1,6-hexanediol

Journal of Material Cycles and Waste Management - Polyamide 66 was efficiently depolymerized and chemically converted by treatment with supercritical MeOH in the presence of glycolic acid. The...     

Highly efficient polishing technology for glass substrates using tribo-chemical polishing with electrically controlled slurry

The outstanding advantage of the novel polishing technology developed by the authors is a considerable reduction in cerium oxide consumption for polishing of glass substrates. This has been realized by introducing tribo-chemical polishing method along with a technique to control the movement of abrasives using an AC electric field. In this paper, we have analyzed the characteristics of the new polishing technique from the viewpoint of slurry distribution in the polishing area under various electric field conditions using a digital image processing and its influence on polishing performance using the experimental setup consisting of high speed polishing method under AC electric field. The results confirmed the increase of slurry distribution in the polishing area under appropriate AC electric field conditions and consequently led to enhanced removal rate, which was 2.5 times higher than that of the conventional CMP (chemical mechanical polishing) method. Furthermore, in spite of enhanced removal rate the surface roughness was comparable to CMP method.     

Feasible conditions for Japanese woody biomass utilization

Environmental Science and Pollution Research - There is an abundance of woody biomass in Japan. However, its economic feasibility is limited. There have been several discussions on whether...