Utilization of wood as building materials is increasingly expected. As a further development of woodenbuildings, there is an increasing movement to make mid-rise and larger scale buildings, such as apartmenthouses and commercial buildings. In wood construction, joints play a very important role. This article outlinesvarious joining techniques for non-residential houses and their characteristics. Wood structure joints aremainly classified into three types: mortice and tenon type joint, metal fastener joint, and adhesive joint.It is possible to achieve a ductile behavior in mortice and tenon type joint by making good use of theperpendicular to grain compression property of wood. The drift pin joint is a commonly used bendingresistance type fastener due to capability of its strength estimation when it has enough arrangement interval.Further research in evaluations of splits failure and reinforcement methods have been promoted. Glued-inrod type joints and lagscrewbolt joint which shaft large diameter screws into timber hole have high rigidityand load carrying capacity. However securing of deformation capacity and control of variation in strength areissues. Self-tapping screw joints has benefit is its workability. Various applications such as shear connector byinclined screw driving and reinforcement element against embedment, shear and sprit have been proposed.In addition to above, this paper will introduce several type of joint technology, such as the large finger joint,steel plate bonding joint, and the use of adhesives as a gap filler and so on.

A review on the use of “task-specific” ionic liquids for designing of the structures of ions. Ionic liquids （ILs）entirely consist of ions. In recent years, functionalized ILs, called “task-specific” ILs （TSILs）, are finding anincreasing number of applications in synthesis, separation, catalysis, and electrochemistry.

乳酸菌の一種であるLeuconostoc mesenteroides によって合成される天然多糖のデキストラン（ α-1,6-glucan） をエステル誘導体化することで，安全性，速乾性，耐水性を有する新規バイオマス接着剤の作製に成功した。エステル基の置換度を変化させることで，アルコールなどの親水性溶媒からアセトンなどの疎水性溶媒まで様々な溶媒に溶解できることが分かった。置換度1.1 のデキストランエステル誘導体は，安全で揮発性も高いエタノールに可溶であり，木材，ガラス，コラーゲン，イカの軟甲などの様々な材料に接着能を示した。更に，デキストランエステル誘導体は，市販のPVA 系接着剤や酢酸ビニル系接着剤よりも高い速乾性を有していた。デキストランエステル誘導体は，接着性能に優れ，木材試験片において，水に浸漬後も酢酸ビニル系接着剤に匹敵する接着強度を有していた。

Scanning Transmission X-ray Microscope（STXM） is one of the most advanced analytical methods to reveal the chemical states in the specific nano-scale areas with focused X-ray from synchrotron radiation. STXM is more suitable for characterizing organic materials than electron microscopies due to the low damage to samples, the high energy resolution, and no necessity of the electron staining. ABS resin, one of the typical polymer alloys including acrylonitrile-styrene resin（AS resin） and polybutadiene, was investigated to clarify the chemical state of the polymeric blend structure by utilizing STXM analysis. We obtained the clear images of the Sea-Island structure in the size range from 10nm to 1mm, judged with the spatial distribution of C≡N bonding in acrylonitrile. C K-edge X-ray Absorption Near Edge Structure（XANES）spectra extracted from the “Sea” and the “Island” areas respectively confirmed that the “Sea” area consisted of AS resin while the “Island” area consisted of polybutadiene by comparing single polymer standards. Ultraviolet exposure as outdoor deterioration model test eliminated the polybutadiene particles with oxidation gasification, and afterward, converted C=C and C ≡ N unsaturated bonding in the AS resin to the functional groups such as -COOH,-CHO, -CO-, and C=N.