ABSTRACT
Protein–protein interactions (PPIs) are important for the study of protein functions and pathways involved in differentbiological processes, as well as for understanding the cause and progression of diseases. Several high-throughput experimental techniques have been employed for the identification of PPIs in a few model organisms, but still, there is a huge gapin identifying all possible binary PPIs in an organism. Therefore, PPI prediction using machine-learning algorithms hasbeen used in conjunction with experimental methods for discovery of novel protein interactions. The two most popularsupervised machine-learning techniques used in the prediction of PPIs are support vector machines and random forestclassifiers. Bayesian-probabilistic inference has also been used but mainly for the scoring of high-throughput PPI datasetconfidence measures. Recently, deep-learning algorithms have been used for sequence-based prediction of PPIs. Severalclustering methods such as hierarchical and k-means are useful as unsupervised machine-learning algorithms for theprediction of interacting protein pairs without explicit data labelling. In summary, machine-learning techniques have beenwidely used for the prediction of PPIs thus allowing experimental researchers to study cellular PPI networks.
ABSTRACT
Highly conjugated linear molecular wires are one of the basic elements for constructing molecular electronic devices. Among these conjugated compounds, ferrocene-terminated compounds as well as their derivatives have been widely studied because of their ideal electrochemical activity. Based on these, a new ferrocene-terminated phenylethynyaniline ( Fc-NH2 ) was synthesized by Sonogashira cross coupling reaction. The structure of the target compound was identified by infrared ( IR) , nuclear magnetic resonance ( NMR) , mass spectra ( MS) and cyclic voltammetry ( CV) . Combined the graphene-chitosan ( GH-CS) and Fc-NH2 , a new composite of GH-CS/Fc-NH2 was prepared and then used for immobilization of Cytc to prepare the GH-CS/Fc-NH2/Cytc/GCE. It was found from the CV result that a pair of peaks near-0. 2 V appeared which can be attributed to Cytc. The GH-CS/Fc-NH2/Cytc modified GCE showed good catalysis towards NaNO2 , and good linear relationship was found in the range of 1 ×10-7-1. 5 ×10-4 mol/L,and the determination limit was bellow 4×10-8 mol/L. Therefore, cytochrome c (Cytc) can be immobilized on the GH-CS/Fc-NH2 and the direct electron transfer can be realized between the electrode and solution and shows good prospect for detection of NaNO2 .
ABSTRACT
A novel hydrophobic ferrocene polymer ( P-Fc) was synthesized successfully. Taken the advantage of 2-hydroxypropyl-β-cyclodextrin ( HP-β-CD ) with hydrophilic outside and hydrophobic inside, P-Fc was successfully enveloped in the cavity of HP-β-CD to form macromolecular vesicle by a self-assembly process. The structure and morphology of the macromolecular vesicle was characterized by FTIR, 1HNMR, SEM and CV. Rhodamine 6G (R6G) and doxorubicin hydrochloride (DOX) was used as target drugs and loaded in the vesicles successfully. After added the oxidant, ferrocene was oxidized to dicyclopentadienyl iron, which destroyed the vesicles successfully. The rapid directional release of the drugs was realized. The maximum loading values of R6G and DOX were 6. 89 and 39. 06 μg/mg, respectively. The release rates were 73. 7%and 88. 2%, respectively. It would increase the utilization level of the drugs and enhance their efficiency.
ABSTRACT
O comportamento de elétrodos modificados por camada de ferroceno nos processos da eletrooxidação de certos compostos orgânicos em meios neutro e ácido foi descrito matematicamente, sendo os modelos correspondentes analisados por meio da teoria de estabilidade linear e da análise de bifurcações. Através da comparação dos modelos foi avaliada a influência do pH ao comportamento dos elétrodos, modificados por ferroceno.
The behavior of the electrodes modified by ferrocene layer in the electrooxidation of certain organic compounds in neutral and acid media was mathematically described and the mathematical models were analyzed by linear stability theory and bifurcation analysis. Comparing the models, the influence of pH on the electrodes´ behavior was evaluated.
ABSTRACT
En esta comunicación se reporta la síntesis y caracterización de nuevos compuestos de rutenio(II) con ligantes ferrocenílicos y/o fosfínicos de fórmula general: [RuCl2(PP)(NN)], donde PP = 1,1'-bis (difenilfosfina)ferroceno (dppf) ó 1,2-bis (difenilfosfina)etano (dppe); NN = 3,3'- dicarboxi-2,2'-bipiridina (3,3'-dcbpy) ó 2,2'-bipiridina (bpy). El estudio teórico DFT de estos compuestos permitió racionalizar algunos resultados experimentales y a la vez dio indicios teóricos de que compuestos de Ru(II) con ligantes ferrocenílicos tienen ciertas propiedades para utilizarlos como fotosensibilizadores en celdas solares sensibilizadas mediante colorantes (CSSC). La caracterización de los ligantes y de los complejos de rutenio( II) se realizó por 1 H-RMN y 31P - RMN, UV-Vis, IR, voltametría cíclica y diferencial de pulso.
Novel ruthenium(II) complexes with ferrocenylic and/or phosphinic ligands of the type [RuCl2(PP)(NN)], with PP = 1,1'- bis(diphenylphosphino)ferrocene (dppf) or 1,2-dipheylphospinoethane (dppe) and NN = 3,3'-dicarboxyl- 2,2'-bipyridine (3,3'- dcbpy) or 2,2'-bipyridine (bpy) were synthesized and characterized. DFT studies of these compounds allowed to explain some experimental aspects, leading to a theoretical design of modified Ru(II) ferrocenylic complexes in order to be used as a dye for Photosensitized Solar Cells. The ligands and the complexes were characterized by 1H y 31P - NMR, UV-Vis, IR and Cyclic and differential pulse voltammetries.
Nesta comunicação reporta-se a síntese e caracterização de novos compostos de rutênio(II) com ligantes ferrocenílicos e/ou fosfínicos de fórmula geral: [RuCl2 (PP)(NN)], onde PP = 1,1'-bis (difenilfosfina) ferroceno (dppf) ou 1,2-bis(difenilfosfina) etano (dppe); NN = 3,3'-dicarboxi- 2,2'-bipiridina (3,3'-dcbpy) ou 2,2'-bipiridina (bpy). O estudo teórico DFT destes compostos permitia racionalizar alguns resultados experimentais e, ao mesmo tempo, deu indicações teóricas de que compostos de Ru(II) com ligantes ferrocenílicos têm umas propriedades para utilizar-se como fotosensivilizadores em Células Solares Sensibilizadas diante Colorantes (CSSC). A caracterização dos ligantes e dos complexos de rutênio(II) foi por 1H-RMN e 31P-RMN, UV-Vis, voltametria cíclica e diferencial de pulso.
ABSTRACT
A portable glucometer is developed with ferrocene as an electron mediator, which is characterized by being easy to operate and portable with the small size of 94.3mm?49.2mm?17.8mm. With this meter, the detection result can be available in no more than 20 seconds with about 1.5?l of blood drawn. The meter has a measurement range from 50mg/dl to 500mg/dl and a precision of 1mg/dl. The measurements are compared with the ones from USI 2300 Stat Plus approved by FDA. The coefficient of variation is from 3.0% to 7.8%, and the availability of linear relationship (y=1.006x-1.37, r=0.990, n=1.18) and comparability are demonstrated. Error table analysis proves that all of measurements are in the acceptable A and B sections. The meter is a validated diagnostic system for in vitro blood glocuse.