Organic Polyvalent Iodinc Reagents-Promoted Coupling Reaction of 1-Alkynes

Teminal alkynes couple smoothly in the presence of PhI(OAc)2 or PhI(OH)OTs.catalytie Cul and base. affording conjugated diynes.

Isolation of a novel polyvalent virulent bacteriophage of E.coli

Objective:To isolate virulent bacteriophage from environment samples and explore the potential way of decontaminating the environmental wastewater. Methods: The standard plaque assay, negative staining transmission electron microscopy (TEM), genome extraction and nucleases test were used to isolate bacteriophages. Then its morphology and characteristics were examined. Results: A novel bacteriophage XY-1 was isolated from a sewage pond in a hospital. It infected and killed 6 E.coli reference strains. The phage had a round head (diameter 40-50 nm), no tail and the genome was ssRNA of approximately 5.0 kb. It was able to reduce E.coli to an extent of 44.63% to 67.00% when being added into the samples of different raw sewage water, depending on the contact time, the temperature and the phage dose. Conclusion: From the morphology typical and nucleotide characteristics (RNA) of the genome of phage, phage XY-1 appears to be closely related to phage f2. It may have some effects for the control of E.coli in sewage water.

多功能不定形耐火材料——“POLYVALENT”

在钢铁厂和焚烧炉中,不定形耐火材料"通用产品"一般用于负荷相对较低的部位。品川公司开发了一种新的多功能通用产品系列,只要调整含水量就可用于喷补、涂敷、浇注和泵吸施工。

阿尔斯通公司再次为Léman快线提供Coradia Polyvalent列车

阿尔斯通公司将为奥弗涅—罗纳—阿尔卑斯大区再次提供10列4辆编组的Coradia Polyvalent列车。这些双系统列车用于到瑞士的跨境Léman快线。订单价值为7000万欧元。该地区已经订购了17列Coradia Polyvalent列车,将于2019年12月中旬在法国—瑞士莱曼快线投入运营。

Characterization and complete genome sequence of vB_EcoP-Bp4,a novel polyvalent N4-like bacteriophage that infects chicken pathogenic Escherichia coli

Pathogenic Escherichia coli cause chicken colibacillosis, which is economically devastating to the poultry in- dustry worldwide （Bagheri et al., 2014）. Owing to in- creasing antibiotic resistance, phage therapy reagents have been developed to treat bacterial infections （Xu et al., 2015）.

Valence Stabilization of Fe(II) Ions during Extended Gamma Irradiation of Their Aqueous Acidic Solutions Containing Phenol, Acetone, 4-Ethylpyridine or Hydrazine Hydrate

Valence stabilization of polyvalent ions in acidic solutions during gamma irradiation is an important issue in nuclear aqueous chemical technology. Radiolysis and self irradiation problems encountered during chemical reprocessing of nuclear fuel or during chemical separation of transuranium elements or fission products are extremely important. Consequently studies on valence stabilization of polyvalent ions in strong gamma irradiation fields are very useful. In our previous publications, the valence stabilization of Fe(II) ions in acidic solutions during continuous gamma irradiation was achieved by using an inorganic compound;such as sodium sulfite, or some organic additives such as aliphatic alcohols, aldehyds or acids prior to irradiation. It was found that the efficiency of valence stabilization depends on the amount and chemical structure of the added compounds. In the present work, valence stabilization of divalent iron during gamma irradiation was studied in presence of some organic additives, belonging to some other classes of organic compounds such as Phenol (aromatic alcohol), Acetone (aliphatic ketone), 4-Aminopyridine (heterocyclic amino compound) and Hydrazine hydrate (aliphatic amino compound) to complement our previous studies. The results showed that valence stabilization of Fe(II) in presence of these compounds depends also on the amount and chemical structure of the additive used. Some interaction mechanisms have been proposed.

Interpretable Housing for Freedom of the Body: The Next Generation of Flexible Homes

If we have gone through the first generation of housing design that?pursued functional optimization, ergonomics, and circulation efficiency during the last century, now we are living in the second generation where more advanced goals, such as universal design, ubiquitous design, sustainable design, and environment-friendly design, are emphasized. Although this second generation of design focuses upon the wellness of humans in accordance with environment, it still has the attitude that a more precisely designed home can guarantee a better life. What lacks in this approach is the freedom of the body;it needs to make its own choice as to how to use a space. Thus, it is suggested in this paper that what is important in designing a home is to provide alternatives in daily lives so as to make a full exploration of a given space. These alternatives can be made by offering residents an interpretable space where they can figure out space usages and routs in a constantly changing context. Two spatial devices are discussed in depths as a way to realize this interpretable house: room-to-room enfilade and ring spatial structure. By investigating some existing house plans, it is illustrated how they can guarantee the freedom of the body, and thus alternatives for the flexible domestic life.

某大型立式中开蜗壳泵的真机性能试验研究

经查阅国内外对于大型立式中开泵的试验研究现状及成果,针对自行研制的1000LS-23立式中开蜗壳泵展开了真机性能试验及布置的研究,从而获得水泵的主要参数性能;最后采用MATLAB中的polyval函数将性能参数拟合成曲线,从而对该泵的参数性能进行评判,并得到了具有可读性的性能参数。从试验的结果中得出:该立式中开泵的各项性能参数基本满足设计要求。

On-site solar PV generation and use: Self-consumption andself-sufficiency

As energy storage systems are typically not installed with residential solar photovoltaic (PV) systems,any “excess” solar energy exceeding the house load remains unharvested or is exported to the grid.This paper introduces an approach towards a system design for improved PV self-consumptionand self-sufficiency. As a result, a polyvalent heat pump, offering heating, cooling and domestic hotwater, is considered alongside water storage tanks and batteries. Our method of system analysisbegins with annual hourly thermal loads for heating and cooling a typical Australian house inGeelong, Victoria. These hourly heating and cooling loads are determined using Transient SystemSimulation (TRNSYS) software. The house’s annual hourly electricity consumption is analysed usingsmart meter data downloaded from the power supplier and PV generation data measured with aPV system controller. The results reveal that the proposed system could increase PV self-consumptionand self-sufficiency to 41.96% and 86.34%, respectively, resulting in the annual imported energybeing reduced by about 74%. The paper also provides sensitivity analyses for the hot and coldstorage tank sizes, the coefficient of performance of the heat pump, solar PV and battery sizes.After establishing the limits of thermal storage size, a significant impact on self-efficiency can berealised through battery storage. This study demonstrates the feasibility of using a polyvalent heatpump together with water storage tanks and, ultimately, batteries to increase PV self-consumptionand self-sufficiency. Future work will concentrate on determining a best-fit approach to systemsizing embedded within the TRNSYS simulation tool.

Observation of Spreading Synaptonemal Complex of Early Pachytene in Cultured Rice by an Electron Microscope

Synaptonemal complex (SC for short) spreading in plant is a new technique devel-oped in recent years. It has advantages of fast observation with a light microscope andhigh resolution with an electron microscope, as Well as the capability of analysingchromosome pairing of zygotene nuclei. This technique has been widely applied not