家蚕抗菌蛋白Ceeropin B cDNAs的表达及其特性

昆虫自身防御体系包含一类急性诱导的不同蛋白质,包括凝集素及抗菌蛋白 Ce-cropins 是一组抗菌蛋白,已知其分子量约4000Da 的杀菌力强的碱性蛋白,具有对革兰氏阴性和阳性细菌的广谱杀菌功能。已报道多种昆虫用细菌诱导的 Cecropin的合成,而且发现细菌细胞壁的组成如脂质体或肽聚糖可能是靶子。诚然。

Metrology for sub-Rayleigh-length target positioning in~10^(22)W/cm^(2)laser-plasma experiments

Tight focusing with very small f-numbers is necessary to achieve the highest at-focus irradiances.However,tight focusing imposes strong demands on precise target positioning in-focus to achieve the highest on-target irradiance We describe several near-infrared,visible,ultraviolet and soft and hard X-ray diagnostics employed in a~10^(22)W/cm^(2)laser±plasma experiment.We used nearly 10 J total energy femtosecond laser pulses focused into an approximately1.3-μm focal spot on 5±20μm thick stainless-steel targets.We discuss the applicability of these diagnostics to determine the best in-focus target position with approximately 5μm accuracy(i.e.,around half of the short Rayleigh length)and show that several diagnostics(in particular,3ωreflection and on-axis hard X-rays)can ensure this accuracy.We demonstrated target positioning within several micrometers from the focus,ensuring over 80%of the ideal peak laser intensity on-target.Our approach is relatively fast(it requires 10±20 laser shots)and does not rely on the coincidence of low-power and high-power focal planes.

Measurement of the integrated luminosity of the Phase 2 data of the Belle Ⅱ experiment

From April to July 2018,a data sample at the peak energy of the T(4 S) resonance was collected with the Belle Ⅱ detector at the SuperKEKB electron-positron collider.This is the first data sample of the Belle Ⅱ experiment.Using Bhabha and digamma events,we measure the integrated luminosity of the data sample to be(496.3±0.3±3.0) pb-1,where the first uncertainty is statistical and the second is systematic.This work provides a basis for future luminosity measurements at Belle Ⅱ.

Review of global neurosurgery education: Horizon of Neurosurgery in the Developing Countries

Globally,the discipline of neurosurgery has evolved remarkably fast.Despite being one of the latest medical specialties,which appeared only around hundred years ago,it has witnessed innovations in the aspects of diagnostics methods,macro and micro surgical techniques,and treatment modalities.Unfortunately,this development is not evenly distributed between developed and developing countries.The same is the case with neurosurgical education and training,which developed from only traditional apprentice programs in the past to more structured,competencebased programs with various teaching methods being utilized,in recent times.A similar gap can be observed between developed and developing counties when it comes to neurosurgical education.Fortunately,most of the scholars working in this field do understand the coherent relationship between neurosurgical education and neurosurgical practice.In context to this understanding,a symposium was organized during the World Federation of Neurological Surgeons(WFNS)Special World Congress Beijing 2019.This symposium was the brain child of Prof.Yoko Kato-one of the eminent leaders in neurosurgery and an inspiration for female neurosurgeons.Invited speakers from different continents presented the stages of development of neurosurgical education in their respective countries.This paper summarizes the outcome of these presentations,with particular emphasis on and the challenges faced by developing countries in terms of neurosurgical education and strategies to cope with these challenges.

Using LiF crystals for high-performance neutron imaging with micron-scale resolution

This paper describes an overview of our recent discovery – clear demonstration that Li F crystals can be efficiently used as a high-performance neutron imaging detector based on optically stimulated luminescence of color centers generated by neutron irradiation. It is shown that the neutron images we have obtained are almost free from granular noise, have a spatial resolution of～5.4 μm and a linear response with a dynamic range of at least 103. The high contrast and good sensitivity of Li F crystals allow us to distinguish two holes with less than 2% transmittance difference. We propose to use such detectors in areas where high spatial resolution with high image gradation resolution is needed, including diagnostics of different plasma sources such as laser and z-pinch produced plasmas.

Performance of Ion-gel Actuator Containing Ionic Liquids

1 Results Electroactive polymers (EAPs) driven by transducing electric energy into mechanical energy have been the subjects of recent interest[1]."Ionic liquids",consisting entirely of cation and anion,have characteristic features such as negligible volatility,non-flammability,thermal and chemical stability,and high ionic conductivity.We proposed an EAP actuator utilizing ion-gels[2-3],which consist of ionic liquids and polymers,sandwiching with two carbon material sheets as shown in Fig.1.This electrol...

Present Status of NIRS ECR Ion Sources

Four ECR ion sources have been operated in National Institute of Radiological Sciences(NIRS). Two ECR ion sources supply various ion species for the Heavy Ion Medical Accelerator in Chiba(HIMAC). The 10GHz NIRS-ECR ion source mainly produces C^(2+) ions for the heavy-ion therapy.Ions of Si,Ar,Fe,Kr and Xe are usually produced by the 18GHz NIRS-HEC ion source for physical and biological experiments.The other two compact ECR ion sources with all permanent magnet configuration have been developed for the new generation carbon therapy facility.One of these,the Kei-source,is a prototype which has been installed to the NIRS-930 cyclotron for axial injection.The other source,Kei2-source,is a demonstration source and utilized for the new generation Linac.In addition,both Kei sources have been used to study fundamental properties. In this paper,present status of the ion sources and recent developments are reported.