Preliminary Results from the TCABR Tokamak

After a long period of assembling and repairing faulty components, tokamak discharges started this year to be routinely obtained in TCABR. TCABR was brought from Lausanne-Switzerland some years ago. It is a middle size ohmic     

The Protosphera Experiment and the PROTO-PINCH Testbench

Spherical Tori A=R/α<2 were originally proposed by M. Peng and his collaborators at ORNL. They are based on economical (low aspect ratio=low volume=low cost) and physical (probable no disruptions, low geodesic curvature,     

Improving the Quality of Thermocouple Wire Made of Platinum-rhodium Alloys

For the manufacture of S-type thermocouple the so-called thermocouple wire of platinum and platinum-rhodium alloy is used.One of the main technical requirements for the quality of the wire,according to State Standard of Russia(GOST 10821),is the uniformity of its largest thermoelectric force(Thermo-emf) in the length different sections.It was found that a determining impact on the uniformity of the wire thermo-emf is the distribution of rhodium along the length of the wire.The impact of platinum-rhodium melt crystallization conditions on the inhomogeneity of wire manufactured from it.It was suggested that the chemical inhomogeneity of the wire is related to the liquation phase of platinum-rhodium alloy.     

大不列颠的传说——李-恩菲尔德步枪全传(四)

李-恩菲尔德No.5系列二战期间,根据东南亚战场上的反映,No.4步枪显得过长过重,不太适合丛林战。因此恩菲尔德兵工厂在1943年开始研制一种较短较轻的No.4缩短型,经过试验后于1944年正式定型为No.5 MkI步枪,通常俗称为"丛林卡宾枪"(Jungle Carbine)。1944年底,No.5步枪开始在皇家兵工厂下属的法扎克雷工厂和BSA公司     

行走在山野——MAGGEAR(麦格尔)TAD快速背包

优秀设计的传承与提升MAGGEAR(麦格尔)一贯信奉质量优先的原则,在针对休闲、户外、运动、军警装备的相关市场上,对于特殊用途的装备,在质量和创意要求上更为苛刻。每一件贴有MAGGEAR商标的户外装备都是为了各行精英的需要而特别设计的,每一处细节所包含的特点和用途都是为了避免产品实际使用中存在的不适和瑕疵,在原材料及周边辅料的选用和制造生产工艺上MAGGEAR也要求精益求精。     

Contribution of extracellular polymeric substances from Shewanella sp. HRCR-1 biofilms to U(VI) immobilization

The goal of this study was to quantify the contribution of extracellular polymeric substances (EPS) to U(VI) immobilization by Shewanella sp. HRCR-1. Through comparison of U(VI) immobilization using cells with bound EPS (bEPS) and cells with minimal EPS, we show that (i) bEPS from Shewanella sp. HRCR-1 biofilms contribute significantly to U(VI) immobilization, especially at low initial U(VI) concentrations, through both sorption and reduction; (ii) bEPS can be considered a functional extension of the cells for U(VI) immobilization and they likely play more important roles at lower initial U(VI) concentrations; and (iii) the U(VI) reduction efficiency is dependent upon the initial U(VI) concentration and decreases at lower concentrations. To quantify the relative contributions of sorption and reduction to U(VI) immobilization by EPS fractions, we isolated loosely associated EPS (laEPS) and bEPS from Shewanella sp. HRCR-1 biofilms grown in a hollow fiber membrane biofilm reactor and tested their reactivity with U(VI). We found that, when reduced, the isolated cell-free EPS fractions could reduce U(VI). Polysaccharides in the EPS likely contributed to U(VI) sorption and dominated the reactivity of laEPS, while redox active components (e.g., outer membrane c-type cytochromes), especially in bEPS, possibly facilitated U(VI) reduction.     

侏罗——白垩纪菊石的演化速度

侏罗纪和白垩纪归于83个科的983个菊石属的阶一级的时限资料是由阶或亚阶的绝对年龄而分析的.我们发现菊石属的平均时限为7.3百万年/菊石属.用类似的方法可以计算出每个科的平均时限.科中长时限属(这些属的时限任意选定为12百万年或更长些)的分布是非随机的.而长时限属集中在少数科里,导致科内属的寿命分布具有显著的非均一性.尽管某些长时限属在形态上比较短时限属要简单,但有些则相等甚至更复杂,这表明菊石属的寿命不仅仅是类别的结果,而且依赖于壳形差异的程度.根据加利福尼亚大峡谷剖面中自垩纪菊石种一级时限资料,由大量长时限属所组成的那些白垩纪菊石科,每个科内种的平均寿命也居于前列.许多长时限属和种具有相似的形态特征:体管(连接环)直径小而壁十分厚.     

Lactobionic acid as antioxidant and moisturizing active in alkyl polyglucoside-based topical emulsions: the colloidal structure, stability and efficacy evaluation

Cosmeceutical antioxidants may protect the skin against oxidative injury, involved in the pathogenesis of many skin disorders. However, an unsuitable topical delivery system with compromising safety profile can affect the efficacy of an antioxidant active. This study investigated the antioxidant potential of lactobionic acid (LA), a newer cosmeceutical active, per se (in solution) and incorporated into natural alkyl polyglucoside (APG) emulsifier-based system using 1,1-diphenyl-2-picrylhydrazyl free radical scavenging and lipid peroxidation inhibition assays. The α-tocopherol was used as a reference compound. The physical stability (using rheology, polarization microscopy, pH and conductivity measurements) of an Alkyl glucoside-based emulsion was evaluated with and without the active (LA); colloidal structure was assessed using polarization and transmission electron microscopy, rheology, thermal and texture analysis. Additionally, the safety profile and moisturizing potential were investigated using the methods of skin bioengineering. Good physical stability and applicative characteristics were obtained although LA strongly influenced the colloidal structure of the vehicle. LA per se and in APG-based emulsion showed satisfying antioxidant activity that promotes it as mild multifunctional cosmeceutical efficient in the treatment and prevention of the photoaged skin. Employed assays were shown as suitable for the antioxidant activity evaluation of LA in APG-based emulsions, but not for α-tocopherol in the same vehicle.