Search results for "amer"
showing 10 items of 2105 documents
Tīklenes attēlu analīze diabētiskās retinopātijas radīto tīklenes izmaiņu detektēšanai
2022
Bakalaura darbs ir uzrakstīts angļu valodā uz 42 lappusēm. Tas satur 32 attēlus, 2 tabulas un 59 atsauces uz literatūras avotiem. Darba mērķis bija pārbaudīt, vai pastāv atšķirība starp vidējo pikseļu intensitāti fundusa attēlā, kurā redzama vesela tīklene, un attēlu ar diabētisku retinopātiju. Attēli tika ņemti no divām datu bāzēm, kurās kopumā bija 127 attēli bez patologijam un 129 attēli ar diabētiskās retinopātijas klātbūtni. Attēlu analīzei tika izmantota programma MATLAB. Pētījuma rezultāti parādīja, ka zilajam kanālam ir būtiska atšķirība, bet sarkanajam un zaļajam kanālam nav. Ir jāveic vairāk pētījumu, lai secinātu, vai ir būtiskas atšķirības pikseļu intensitātē veseliem un diabēti…
Recent advances on nanomaterial based electrochemical and optical aptasensors for detection of cancer biomarkers
2018
Abstract Cancer is a real menace to all societies globally since it is the leading cause of premature mortality in men and women. The incidence of malignancies is enhancing as a result of plenty factors. Physically and economically concerns that occur in cancers patients cannot be neglected. However, current diagnostic methods and cure duration do not fulfill patients requirements. Therefore, it is essential to detect and diagnose cancer biomarkers as soon as possible and overcome the current burdens. Novel aptasensors is emerging as one of the most promising strategies for early recognition of cancer. Aptamers an artificial DNA or RNA sequences, possess plenty of merits such as easy produc…
Iberoamérica en los currículos autonómicos de Ciencias Sociales de Educación Primaria: ¿realidad educativa o declaración de intenciones?
2017
El presente estudio pretende aproximarse a la determinación curricular de la dimensión iberoamericana, así como a sus implicaciones culturales identitarias, mediante el análisis de los planteamientos y enfoques prescritos en las nuevas disposiciones autonómicas de la LOMCE para la Educación Primaria en España. Asimismo, revisa la presencia y potencial adopción de perspectivas interculturales en la enseñanza de la Historia, y específicamente de la iberoamericana, para este nivel educativo This study analyzes the Ibero-American supranational reality and its cultural implications of a possible common cultural identity. With this intention, we analyze the approaches and expositions of the new e…
Rational synthetic design of well-defined Pt(bisethynyl)/Zn(porphyrin) oligomers for potential applications in photonics
2011
Well-defined oligomers of 1, 2, 3 and 4 units built upon the very soluble bis-1,15-(1,4-ethynylbenzene)-3,7,13,17-tetramethyl-2,8,12,18-tetrakis(n-hexyl) zinc(II) porphyrin ligand and the trans-bis(tri-n-butylphosphine)platinum(II) linker, with acetylene or trimethylsilane as end groups, has been prepared in the presence of a dichloromethane/diethylamine mixture (1 : 1 v/v) and CuX (X = Cl, I) at room temperature, analogue to a Sonogashira coupling. The new monodisperse organometallic oligomers were characterized by 1H, 31P NMR, UV-visible spectroscopies and MALDI-TOF mass spectrometry. The methyl groups placed at the 3,7,13,17-positions induces the locking of the C6H4 fragment in a perpend…
Dual-affinity avidin molecules
2005
A recently reported dual-chain avidin was modified further to contain two distinct, independent types of ligand-binding sites within a single polypeptide chain. Chicken avidin is normally a tetrameric glycoprotein that binds water-soluble d-biotin with extreme affinity (Kd ≈ 10−15M). Avidin is utilized in various applications and techniques in the life sciences and in the nanosciences. In a recent study, we described a novel avidin monomer-fusion chimera that joins two circularly permuted monomers into a single polypeptide chain. Two of these dual-chain avidins were observed to associate spontaneously to form a dimer equivalent to the wt tetramer. In the present study, we successfully used …
Ocena aktywności przeciwdrobnoustrojowej ekstraktu roślinnego z Dionaea muscipula
2018
Rośliny owadożerne są przedmiotem badań, nie tylko ze względu na charakterystyczny dla nich sposób pobierania składników odżywczych z otoczenia, ale również z powodu ich pożądanego oddziaływania na mikroorganizmy. W piśmiennictwie znajdujemy potwierdzenie, że ekstrakty z roślin owadożernych mają działanie nie tylko bakteriostatyczne, ale również bakteriobójcze i grzybobójcze. Do badań wybrano jednego z przedstawicieli roślin owadożernych, Dionaea muscipula J. Ellis (Muchołówka amerykańska), w celu określenia ich aktywności biologicznej. Materiałem do badań były odpowiednio przygotowanie ekstrakty z dwóch odmian Dionaea muscipula: Regular Form oraz Red Green. Hodowle prowadzono w warunkach ś…
I diritti dei popoli indigeni sulle risorse naturali in una recente sentenza della Corte interamericana dei diritti umani
2008
Prefazione
2011
Sul filo della memoria si ricostrusice l'importanza dello studio comparato del sistema giuridico degli Stati Uniti nella lettura critica del volume di Toni Fine