The conventional ceramic route was utilized to prepare a hard magnetic powder (M-type strontium ferrite, SrFe12O19). The stoichiometric mixture of iron oxide and strontium carbonate were calcined at 1000C and then fired at various temperatures. The influence of various reaction parameters such as mixing ratio, calcination temperature, firing temperature and firing time on the magnetic behaviors...

The Charpy impact energy of A356 alloys has been measured. Instrumented Charpy impact tests have been conducted at 25, 100, 150, and 200 ~ The Charpy specimens were machined from plate castings or tapered cylindrical castings. The plates were produced in sand molds, and tapered cylinders were produced in water-cooled copper molds. Both unmodified and strontium-modified castings were tested. The...

1. Albrektsson T, Johansson C. Osteoinduction, osteoconduction and osseointegration. Eur Spine J. 2001;10 Suppl. 2:S96–101. 2. Reginster JY, Seeman E, De Vernejoul MC, Adami S, Compston J, Phenekos C, et al. Strontium Ranelate reduces the risk of nonvertebral fractures in postmenopausal women with osteoporosis Treatment Of Peripheral Osteoporosis (TROPOS) stydy. J Clin Endocrinol Metab. 2005;90...

Abundance ratios relative to iron for carbon, nitrogen, strontium and barium are presented for a metal-rich main sequence star ([Fe/H]=–0.74) in the globular cluster ω Centauri. This star, designated 2015448, shows depleted carbon and solar nitrogen, but more interestingly, shows an enhanced abundance ratio of strontium [Sr/Fe]≈1.6 dex, while the barium abundance ratio is [Ba/Fe]≤0.6 dex. At th...

This paper presents a development of a new biokinetic model for strontium, which accounts for age and gender differences of metabolism in humans. This model was developed based on the long-term follow-up of the residents living on the banks of the Techa River (Southern Urals, Russia) contaminated with Sr in 1950-1956. The new model uses the structure of ICRP model for strontium but model parame...

Water introduced to surface drainages, such as agricultural and roadway runoff, mine drainage, or coalbed natural gas (CBNG)-produced water, potentially can be of environmental concern. In order to mitigate potential environmental effects, it may be important to be able to trace water discharged to the surface as it infiltrates and interacts with near-surface aquifers. We have chosen to study w...

In review the possibility of biomaterials osseointegration improvement with help of bisphosphonates or strontium ranelate is discussed. For this purpose, they are added to hydroxyapatite used for implants coating, or are included as a component of bulk calcium phosphate materials. Strontium is employed as a compound of biodegradable metal alloys, also. Combined use of carrier (implant) with bis...

Inhibition of calcium absorption by dietary strontium is the result of a block in the renal synthesis of 1,25-dihydroxycholecalciferol (1,25-(OH)&C) from 25-hydroxycholecalciferol (25-OHCC). The administration of 1,25-(OH)&C but not 25-OHCC restores to normal calcium absorption in strontium-fed chicks. Kidney mitochondria from strontium-fed chicks do not metabolize 25-OHCC to 1,25-(OH)&C, but r...

Inhibition of calcium absorption by dietary strontium is the result of a block in the renal synthesis of 1,25-dihydroxycholecalciferol (1,25-(OH)&C) from 25-hydroxycholecalciferol (25-OHCC). The administration of 1,25-(OH)&C but not 25-OHCC restores to normal calcium absorption in strontium-fed chicks. Kidney mitochondria from strontium-fed chicks do not metabolize 25-OHCC to 1,25-(OH)&C, but r...

In March 2011, enormous radioactive materials, mainly 137Cs, 129I, 90Sr and so on were released from the Fukushima Daiichi nuclear power plant after The Great East Japan Earthquake. Tap water, raw milk, vegetables, mushrooms, fruit, nuts, seaweed, marine invertebrates, fish, beef, wild animal meat, brown rice, wheat, tea leaves and other foodstuffs were contaminated by many radionuclides. In pa...