The aim of the present work to study effect changing velocity (Reynold's number) on oxygen cathodic polarization using brass rotating cylinder electrode in 0.1, 0.3 and 0.5N NaCl solutions (PH = 7) at temperatures 40, 50 600 C. Cathodic experiments were conducted as a function rotational speed concentration.

The paper shows that high–quality super-conducting Nb films can be deposited by means of arc discharges under ultra–high vacuum conditions. The critical temperature Tc of Nb–films obtained with a planar cathodic arc Ultra High Vacuum (UHV) system, is very close to that of pure bulk niobium Tc = 9.26 K and the transition to super–conducting state is very narrow. The films have higher Residual Re...

Oxygen transport to vertebrate tissues is dependent upon (a) the intrinsic O2-binding properties of haemoglobin (Hb) and (b) modulation by allosteric effectors, such as nucleoside triphosphates (NTP), that depress Hb O2-affinity in fish red cells. While some species, such as flatfish, primarily use adenosine triphosphate (ATP) to modulate O2-binding to Hb, others, such as eel and carp, also use...

Lubang biopori adalah lubang yang dibuat khusus untuk mengembangkan di dalam tanah. Biopori lubang-lubang kecil tanah membantu bernafas (mengalirkan oksigen) dan menyediakan/meresapkan air hingga ke dalam. bentuk artifisial dari akar tanaman, khususnya bambu memiliki beberapa kelebihan dengan kemampuannya menyerap nitrogen karbon serta banyaknya mikroorganisme sekitar ujung berperan aktif membe...

Penelitian ini bertujuan untuk mengetahui hubungan antara attachment dengan self-esteem remaja serta memberikan gambaran keterikatan ayah, ibu dan teman selama pandemic covid-19 terhadap harga diri (self esteem) remaja. dilakukan sampel 319 siswa berusia 12 – 18. Data diperoleh Menggunakan alat ukur Parents Peer Attachment Revised (IPPA-R) Rosenberg Self Esteem Scale (RSES). Analisis data mengg...

This work is a preliminary examination of mechanistic issues on the comparative corrosion performance of regular epoxy-coated rebar (ECR) and dual polymer-zinc coated reinforcement (DCR) in simulated concrete pore solution with and without chloride ions, at polarizations from +100 mV to -1000 mV in the saturated calomel electrode (SCE) scale and exposure periods of 1 month or longer. Both mater...

Chitosan (CS) is a versatile biopolymer whose morphological and chemico-physical properties can be designed for a variety of biomedical applications. Taking advantage of its electrolytic nature, cathodic polarization allows CS deposition on electrically conductive substrates, resulting in thin porous structures with tunable morphology. Here we propose an easy method to obtain CS membranes with ...

This paper deals with the urgent issue of the search of new drugs based on plant raw materials that have an influence on various stages of oxidation processes occurring in the human body. The aim of this paper is to determine the antioxidant activity of the bilberry extracts that are used in the medicine practice by a cathodic voltammetry method. We consider the influence of water and alcohol b...

Cathodic prevention (CPre) technique is a promising method and has been used for the past two decades to prevent steel from corrosion in concrete structures. However, wide application of this technique has been restricted due to high costs of anode materials. In order to lower the cost and further improve this technique, carbon fiber composite anode has been introduced as an alternative anode m...