Maternal Feeding Controls Fetal Biological Clock

BACKGROUND: It is widely accepted that circadian physiological rhythms of the fetus are affected by oscillators in the maternal brain that are coupled to the environmental light-dark (LD) cycle. METHODOLOGY/PRINCIPAL FINDINGS: To study the link between fetal and maternal biological clocks, we investigated the effects of cycles of maternal food availability on the rhythms of Per1 gene expression in the fetal suprachiasmatic nucleus (SCN) and liver using a transgenic rat model whose tissues express luciferase in vitro. Although the maternal SCN remained phase-locked to the LD cycle, maternal restricted feeding phase-advanced the fetal SCN and liver by 5 and 7 hours respectively within the 22-day pregnancy. CONCLUSIONS/SIGNIFICANCE: Our results demonstrate that maternal feeding entrains the fetal SCN and liver independently of both the maternal SCN and the LD cycle. This indicates that maternal-feeding signals can be more influential for the fetal SCN and particular organ oscillators than hormonal signals controlled by the maternal SCN, suggesting the importance of a regular maternal feeding schedule for appropriate fetal molecular clockwork during pregnancy

Development and application of an informatization upgrade device for old equipment in ceramic sanitary ware industry

A device is proposed, which can be used to upgrade the informatization process of old equipment and information isolated island equipment of ceramic enterprises. It has the characteristics of standard, high efficiency, low cost and low risk. The universal fast interface does not interfere with the control system of the device itself when connected to the device. It can obtain data that the target device system has but is not open or the system does not have. Then, the device use the standard industrial communication protocol to transmit the data to the manufacturing execution system in accordance with the agreed data format. This method lay a good foundation for the informatization upgrade and optimization of the data. Furthermore it can be used to optimize and control production. Finally, in enterprise applications, it shows that the device has certain economic and social benefits

Study of Proton exchange Membrane Fuel Cells(PEMFC)

通过测定电压～电流密度曲线等方法研究质子交换膜燃料电池的电极参数，构造了Ｅｃｅｌ＝０．７Ｖ，Ｉ＝０．５５Ａ／ｃｍ２并能够稳定运行的燃料电池．改进电池的电极结构，研究了各种操作条件如温度、压力、增湿情况、尾气流量等对电池性能的影响．The electrode kinetic parameters for proton exchange membrane fuel cells(PEMFC) were investigated by measuring the relations of cell potential and current density. An experimental stack of PEMFC which can be operated at E cell =0.7V, I =0.55A/cm 2 steadily is presented, and the effects of electrode structure and operation conditions such as temperature, pressure, humidification, flow rate on the performance of PEMFC are discussed.作者联系地址：中国科学院大连化学物理研究所Author's Address: Dalian Institute of Chemical Phycics, Chinese Academy of Science, Dalian 116023$$

A Study on Solid Polymer Electrolyte Fuel Cell

报道了固体聚合物电解质燃料电池的电极制备方法和温度、压力以及阴极气量对电池性能的影响．Solid polymer electrolyte fuel cell(SPEFC)show promise of a high level of performance in the present fuel cell.In this paper,we report the method of SPEFC electrode preparation,and the effects of temperature,pressure and gas flow rate on the performance.作者联系地址：中国科学院大连化学物理研究所Author's Address: Dalian Institute of Chemical Physics,Chinese A cadamy of Sciences,Dalian 11601