Materials Literature
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Polarized absorption and fluorescence spectra were analyzed to establish individual energy (Stark) levels of Nd3+ ions in host crystals of Sr5(PO4)3F (SFAP) and Ca5(PO4)3F (FAP). Site-selective excitation and fluorescence facilitated differentiation between Nd3+ ions in emitting sites associated with 1.06 μm stimulate…
Freshly harvested beansprouts displayed a respiration rate of about 1 mmol O2 kg−1 h−1 at 10°C which was strongly dependent on temperature, a 10-fold increase being observed every 16·5°C (z=16·5°C, ie Q10=4·4). This commodity is also characterised by a high initial microbial load (about 107 cells g−1). During storage…
The crystal structure of shigaite, [AlMn (super 2+) 2 (OH) 6 ] 3 (SO 4 ) 2 Na(H 2 O) 6 {H 2 O} 6 , rhombohedral, a 9.512(1), c 33.074(5) Aa, V 2591.0(8) Aa 3 , Z = 3, R3, has been solved by direct methods and refined to an R index of 4.2% using 979 observed reflections measured with MoKalpha X-radiation. The structura…
The crystal structure of clinoatacamite, Cu 2 (super 2+) (OH),Cl, has been determined and refined to indices R = 5.2 and wR = 4.9%. The structure is monoclinic, space group P2 1 /n (14), with cell parameters a 6.144(1), b 6.805(1), c 9.112(1) Aa, beta 99.55(3) degrees , V 375.7(2) Aa 3 , and with Z = 4. The structure…
The temperature effect on gold nanodispersion in organic liquids was examined by optical absorption spectroscopy and transmission electron microscopy. It was found that the color of the dispersion changed from purple just after preparation under a low-temperature condition to reddish purple or pink with the elevation…
Emulsion copolymerization of silicones (octomethyl tetracyclosiloxane, D4 and methacryloxypropyl trimethoxy silane, MATS) and acrylics was carried out using three different polymerization processes: semicontinuous monomer emulsion addition, batch and initiator solution addition. Results showed that only the semicontin…
Abstract Active polymers containing peroxide groups were synthesized via polymerization of styrene or methyl methacrylate with oligo(adipoyl 2,5‐dimethylhexane‐2,5‐diyl peroxide) (OAHP) or oligo(2,5‐dimethylhexane‐2,5‐diyl 4,4′‐azobis(4‐cyanoperoxyvalerate)) (LUAB). Poly(β‐hydroxynonanoate) (PHN) and the active polyme…
The crystal structure of namuwite, (Zn,Cu)4S04(OHk4H20, trigonal, a = 8.331(6), C = 10.54(1) A, V = 634(1) A3, Pj, Z = 2, has been solved by direct methods and refined to an R index of 7.9% using MoKa X-ray data. The fundamental building unit of the structure is a gently modulated sheet of edge-sharing (Zn,Cu) octahed…
Porous GaP layers prepared by electrochemical anodization of (1 0 0) and (1 1 1) A-oriented n-GaP crystalline substrates in HF solution have been studied by Raman spectroscopy. A surface vibrational mode at 397 cm−1 was observed in porous GaP. The process of anodization results in downward shifts of the TO and LO phon…
The coincidence problem for planar patterns with N-fold symmetry is considered. For the N-fold symmetric module with N<46, all isometries of the plane are classified that result in coincidences of finite index. This is done by reformulating the problem in terms of algebraic number fields and using prime factori…
UNLABELLED: We conducted a systematic study of the effects of liposome formulation and encapsulated radionuclides on imaging ability. METHODS: Various types of liposomes were prepared and labeled with 67Ga, 111In or 99mTc. Their tumor-imaging potential was evaluated in terms of tumor accumulation and tumor-to-blood ra…
Thermosensitive liposomes are microscopic vesicles that can contain drugs and release them effectively in response to hyperthermia. To deliver an antitumor drug specifically to brain tumor, the authors used thermosensitive liposomes containing cis-diamminedichloroplatinum (CDDP) in conjunction with localized brain hea…
The magnetic properties of ${\mathrm{BaFe}}_{12}$${\mathrm{O}}_{19}$ and ${\mathrm{BaFe}}_{10.2}$${\mathrm{Sn}}_{0.74}$${\mathrm{Co}}_{0.66}$${\mathrm{O}}_{19}$ single crystals have been investigated in the temperature range (1.8 to 320 K) with a varying field from -5 to +5 T applied parallel and perpendicular to the…
Evidence is presented for some secondary structure, very likely alpha-helical, of the propeptide of subtilisin E in aqueous salt solution, as well as for strong intermolecular interactions between the propeptide and the mature sequence both in the processed and unprocessed states (i.e. in prosubtilisin). Prosubtilisin…
Biodegradable films were prepared by casting acetone solutions of mixtures of a high molecular weight poly(DL-lactic acid) (HMW-PLA50) with 0, 10, and 30% w/w poly(DL-lactic acid) oligomers (LMW-PLA50), before drying. From size exclusion chromatography (SEC) it was shown that degradation occurred during film processin…
Bacillus subtilis has duplicate isochorismate synthase genes, menF and dhbC. Isochorismate synthase is involved in the biosynthesis of both the respiratory chain component menaquinone (MK) and the siderophore 2,3-dihydroxybenzoate (DHB). Several menF and dhbC deletion mutants were constructed to identify the contribut…
A new poly(L-)lactic acid (PLLA) thread was tested by applying it in fascial closures of male Wistar rats. The tissue reactions around the thread and in the fascial union, and the changes on the surface and the mechanical properties of the thread were evaluated at 1, 3, 6, 12, 28, and 52 weeks following surgery. Histo…
Serpentinite from Lancaster County, Pennsylvania, consists of a variety of fme-grained serpentine minerals, chlorite, randomly interstratified serpentine-chlorite, and a series of phases based on regular interstratification of serpentine and chlorite (SxCy, where x and y are integers). Within the resolution of the AEM…
X-ray absorption spectroscopy is widely employed in the structural analysis of disordered systems. In the standard extended x-ray absorption fine structure (EXAFS) analysis the coordination of the photoabsorber is usually defined by means of Gaussian shells. It is known that this procedure can lead to significant erro…
Abstract The general crystallization behavior of amorphous polyamides during heating treatment was measured by wide angle X‐ray scattering (WAXS) and differential scanning calorimetry (DSC) to get information on (1) the temperature range where the crystallization in an anisothermic process takes place and (2) the type…