Authors:M. Zaharescu, A. Jitianu, A. Brãileanu, V. Bãdescu, G. Pokol, J. Madarász, and Cs. Novák
The hydrolysis-polycondensation of organically modified Si-alkoxides leads to the obtaining of inorganic-organic hybrid materials
in which the organic moieties remain as permanent groups bonded to the inorganic network.
The molecular species previously determinated by GC-MS during the gelation process have been significantly different according
to the type of the alkoxide used.
In the present work, thermal stability of SiO2-based inorganic-organic hybrid materials starting with TEOS (tetraethoxysilan), MTEOS (triethoxymethylsilan), VTEOS (triethoxyvinylsilan)
and MTMOS (trimethoxymethylsilan) was studied.
The molecular structure of the gels obtained determines differences in their thermal behaviour. Gels obtained starting with
MTEOS show the highest thermal stability, while gels obtained using VTEOS the lowest, among the substituted alkoxides. A particular
behaviour presents the gel obtained with MTMOS that decomposes in four steps. This could be explained by the presence in the
gel of some prevalent types of molecular species with different thermal stability.
Hybridness is an important but by no means the defining feature of a translation. Affecting passages or whole texts it is functionally related to a spectrum of causes varying from individual to historical and social motivations (e.g., „resistant translation” vs. pragmatic enculturation). It is also bound up with the formative role translations have always played in the life of different communicative communities, serving as a diagnostic byproduct of the influences wielded by translations on target discourse (six factors of influence). The historical variability and the multiple uses of translation have continually revalued the strategies which translators have applied to produce target texts on a scale ranging from hybridness, often regarded as a deficiency, to originality and creativity lending the target version a new life of its own in a new cultural context. The concept of hybridness could serve its purpose if it were taken as just one option in a new research paradigm that looks at the uses and shapes of translation in history. It studies translation events as they arise in a particular time and place and function as agents in the course of history.
Different types of hybrid constructions, consisting of glass and another material, are analyzed or even newly developed focusing on an optimal structural interaction between both materials and in respect to architectural, static-structural and fabrication criteria. The new, high transparent structural element — hybrid steel-glass beam consists of steel flanges, glass web and bonded connection between them. Long glued joint realized by polymer adhesive is the key element of the structure, therefore the key aspect of the development is the detailing of the steelglass interface and choice of the suitable adhesive. Wide range of adhesives with different mechanical and deformational properties was involved to experimental program. Non-linear Finite Element material models were created in accordance with the results of material tests and than calibrated on steel-glass connection tests. Properly working numerical models of the adhesive layer are being involved to the complex FE model of the hybrid beam and verified by the full-scale tests of the beams with 4 m span.
A new phase of the hybrid fibrous ion exchanger, pyridine based cerium(IV) phosphate (PyCeP), has been synthesized in the
form of a sheet like paper by mixing ceric sulphate, phosphoric acid and pyridine in a particular ratio to get the material
of the optimum ion exchange characteristics. This material has been characterized with the help of ion exchange capacity,
elution and concentration and pH titrations behaviour in addition to some physicochemical studies like X-ray diffraction,
IR, TG, DTG and SEM studies. The SEM study confirms the fibrous nature of the material while amorphous nature is revealed
by its X-ray spectrum.
Authors:I. I. Cofaru, G. Husi, N. F. Cofaru, and M. D. Roman
The article is approaching an interesting topic regarding ACL reconstruction using the hamstring tendons (semitendinosus and gracilis) as the graft. The initial graft fixation after ACL reconstruction is mechanical and it must assure the stability of the system until the biologic integration takes place. No fixation system is as strong as the native ACL insertion. Therefore, hibrid fixation like an improvement of simple fixation is a field worth studying. The fixation shown in this article is the Hybrid fixation consisting of direct fixation with interference screw and an extra cortical fixation over a cortical screw.
The resistance of
maize inbred lines and their hybrids to Western Corn Rootworm was investigated
in a 4 × 4 full diallel system. The most tolerant line against WCR
larvae was the inbred line P26. Four maize inbred lines and their 12 normal and
reciprocal crosses were investigated for resistance to Fusarium ssp. and
European Corn Borer under natural conditions in four replications in 1998-2000.
The highest GCA values were found for the inbred lines P26 and P50. Studies
were also made to determine the optimum concentration of imidazolinone in the
selective medium for the detection of resistant cell lines originating from
homozygous genotypes produced by irradiation.