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Patents

Amherst Rheology Course ARC2005 “Merging Experiment with Theory in Rheology”

Comparison of crystallinity between natural hydroxyapatite and synthetic cp-Ti /HA coatings

Commercial purity titanium (cp-Ti), and some of its alloys are important materials in the medical field because of their excellent biocompatibility and mechanical properties. Recently a simple chemical method to induce bioactivity in these inert metallic materials was reported. In this work, the biomimetic chemical pr…

Rheological properties of alumina injection feedstocks

The rheological behavior of alumina molding feedstocks containing polyethylene glycol (PEG), polyvinylbutyral (PVB) and stearic acid (SA) and having different powder loads were analyzed using a capillary rheometer. Some of the feedstocks showed a pseudoplastic behavior of n < 0, which can lead to the appearance of wel…

Complex-shaped ceramic composites obtained by machining compact polymer-filler mixtures

Research in the preparation of ceramics from polymeric precursors is giving rise to increased interest in ceramic technology because it allows the use of several promising polymer forming techniques. In this work ceramic composite pieces were obtained by pyrolysis of a compacted mixture of a polysiloxane resin and alu…

Effective grating theory for resonance domain surface-relief diffraction gratings

An effective grating model, which generalizes effective-medium theory to the case of resonance domain surface-relief gratings, is presented. In addition to the zero order, it takes into account the first diffraction order, which obeys the Bragg condition. Modeling the surface-relief grating as an effective grating wit…

Recent Progress on Non-oriented Silicon Steel

Control of crystalline orientation and consequent enhancement of magnetic properties are important for decreasing core loss of non-oriented silicon steel as well as grain-oriented silicon steel. Through the development of special process techniques to produce clean refined steel, it is now possible to use any element…

A Simple Route to Prepare Monofunctionalised 21‐Thia‐, 21,23‐Dithia‐, and 21‐Thia‐23‐oxaporphyrins from Unsymmetrical Thiophene Diols and Their Use in the Synthesis of Covalently Linked Unsymmetrical Porphyrin Dimers

Abstract A series of unsymmetrical thiophene diols has been prepared in two steps from thiophene in 16–46 % yields. The unsymmetrical thiophene diols containing functionalised aryl groups were then used as key synthons for the synthesis of a series of monofunctionalised 21‐thia (N 3 S), 21,23‐dithia (N 2 S 2 ) and 21‐…

Effect of Some Variables on Properties of 100% Cotton Vortex Spun Yarn

This paper examines the influence of various parameters such as delivery speed, nozzle pressures, and yarn count on the properties of vortex yarns produced using a Murata vortex spinning system. The results indicated that the delivery speed, nozzle pressure, and yarn count are all significant parameters for yarn evenn…

Quantification of corona discharges on nonceramic insulators

This paper attempts to establish a correlation of the visual images of corona obtained from a camera with discharge magnitude measured with conventional partial discharge equipment. A linear relationship is shown between the transformed image parameters and the discharge magnitude, thereby providing a means for quanti…

Generalised scaling relations for dynamic centrifuge tests

The trend toward physical modelling of larger prototypes triggers a move towards expansion of the current capability of dynamic centrifuge tests. In this paper a method based on the concept of two-stage scaling is proposed that allows expanded use of the currently available facilities. In the first stage a prototype i…

Dinuclear Complexes of MII Thiocyanate (M = Ni and Cu) Containing a Tridentate Schiff‐Base Ligand: Synthesis, Structural Diversity and Magnetic Properties

Abstract A dinuclear Ni II complex, [Ni 2 ( L ) 2 (H 2 O)(NCS) 2 ] · 3H 2 O ( 1 ) in which the metal atoms are bridged by one water molecule and two μ 2 ‐phenolate ions, and a thiocyanato‐bridged dimeric Cu II complex, [Cu( L )NCS] 2 ( 2 ) [ L = tridentate Schiff‐base ligand, N ‐(3‐aminopropyl)salicylaldimine, derived…

Driving forces for sodium removal during phytoremediation of calcareous sodic and saline–sodic soils: a review

Abstract. Sodic and saline–sodic soils are characterized by the occurrence of sodium (Na + ) at levels that result in poor physical properties and fertility problems, adversely affecting the growth and yield of most crops. These soils can be brought back to a highly productive state by providing a soluble source of ca…

Evaluation of mechanical alloying to obtain Cu-Al-Nb shape memory alloy

The technical viability of preparing a Cu-Al-Nb shape memory alloy by high energy ball milling in a planetary mill has been evaluated. The alloy Cu-13Al-2Nb (wt. (%)) was prepared by mixing pure elemental powders. A ball-to-powder weight ratio of 6:1 and rotation rate of 150 rpm in argon atmosphere were the main proce…

Lyotropic Chromonic Liquid Crystals for Biological Sensing Applications

We describe director distortions in the nematic liquid crystal (LC) caused by a spherical particle with tangential surface orientation of the director and show that light transmittance through the distorted region is a steep function of the particle's size. The effect allows us to propose a real-time microbial sensor…

Preparation and characterization of carboxymethylchitosan

Chitosan was reacted with monochloroacetic acid at room temperature for different reaction times (3h, 5h, 7h and 10h) and employing two chitosan/monochloroacetic acid molar ratios (1:4.3 or 1:8.6). The carboxymethylation of chitosan was confirmed by ¹H NMR and 13C NMR spectroscopy. The carboxymethylchitosans had avera…

Development of Nb Microalloying 400 MPa Ⅲ Grade Steel Reinforced Bar

The φ10~25 mm reinforced bars of Nb microalloying 400 MPa Ⅲ Grade steel - 0.17~0.25C,1.20~1.45Mn,0.02～0.04Nb have been developed by 40 t EBT are furnace- 40 t LF- 150 mm×150 mm billet concasting process. The mechanical properties of reinforced bars were σs420~490 MPa,σb590~680 MPa,δ524%～30%,and the yield strength decr…

Practice for Energy Saving of a 65 t Consteel Electric Arc Furnace by Hot Metal Charging at Shiheng Special Steel

With using 30% hot metal charging while the temperature of metal being no less than 1300 ℃,and optimizing power supply schedule and foam slag process,the steelmaking power consumption of a 65 t electric arc furnace at Shiheng Special Steel decreased by 95 kWh/t, the Oxygen consumption decreased by 2.8 m³/t and the tap…

Salicylaldimine−Aluminum Complexes for the Facile and Efficient Ring-Opening Polymerization of ε-Caprolactone

ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTSalicylaldimine−Aluminum Complexes for the Facile and Efficient Ring-Opening Polymerization of ε-CaprolactoneNobuyoshi Nomura, Takuji Aoyama, Ryohei Ishii, and Tadao KondoView Author Information Laboratory of Polymer Chemistry, Grad…

Facile Procedure To Prepare Three-Dimensionally Ordered Macroporous (3DOM) Perovskite-type Mixed Metal Oxides by Colloidal Crystal Templating Method

A new facile procedure to prepare three-dimensionally ordered macroporous (3DOM) materials of perovskite-type La 1 - x Sr x FeO 3 ( x = 0−0.4) mixed metal oxides by using colloidal crystal templating method is presented. This method can ensure the desired metal ratio throughout the preparation procedure, and the desir…