New genera and new species of Catenulaceae (Bacillariophyta) from Coral Reef habitat of two Indonesia islands-Bawean and Sulawesi-A morphological approach.

Indonesia is listed as a region with high marine biodiversity, especially when considering the three large tropical ecosystems: seagrass beds, mangroves and coral reefs. It is likely that the biodiversity of diatoms in this area is also high. Samples for this research were taken from the remote area of Bawean Island and Tomini Gulf in Central Sulawesi.

Application of TiO Supported on Nickel Foam for Limitation of NO in the Air via Photocatalytic Processes.

TiO was loaded on the porous nickel foam from the suspended ethanol solution and used for the photocatalytic removal of NO. Such prepared material was heat-treated at various temperatures (400-600 °C) to increase the adhesion of TiO with the support. Obtained TiO/nickel foam samples were characterized by XRD, UV-Vis/DR, FTIR, XPS, AFM, SEM, and nitrogen adsorption at 77 K.

The Impact of N/O-Functional Groups on the Sorption Capabilities of Activated Carbons Derived from Furfuryl Alcohol.

This work describes the effect of nitrogen and oxygen functional groups on the sorption properties of activated carbons produced from furfuryl alcohol. The poly(furfuryl) alcohol underwent carbonization in nitrogen, ammonia, and ammonia and air (in a 3:2 proportion) atmospheres at 600 °C for 4 h. The resulting materials were subsequently activated in a carbon dioxide atmosphere for 1 h at temperatures of 700 °C, 800 °C, 900 °C, and 1000 °C.

The Superiority of TiO Supported on Nickel Foam over Ni-Doped TiO in the Photothermal Decomposition of Acetaldehyde.

Acetaldehyde decomposition was performed under heating at a temperature range of 25-125 °C and UV irradiation on TiO doped by metallic Ni powder and TiO supported on nickel foam. The process was carried out in a high-temperature reaction chamber, "The Praying Mantis", with simultaneous in situ FTIR measurements and UV irradiation. Ni powder was added to TiO in the quantity of 0.

Influence of Surface Roughness on the Properties of Nitrided Layer on 42CrMo4 Steel.

A crucial factor of a nitriding process of treated parts is surface roughness. Eight samples of 42CrMo4 steel were used to investigate the parameter represented by Ra. In the study, the innovative combined microhardness profiles were used to present results within the compound zone and diffusion layer.

Investigation of CO Adsorption on Avocado Stone-Derived Activated Carbon Obtained through NaOH Treatment.

Activated carbons were prepared from avocado stone through NaOH activation and subsequent carbonization. The following textural parameters were achieved: specific surface area: 817-1172 m/g, total pore volume: 0.538-0.

The Influence of NHNO and NHClO on Porous Structure Development of Activated Carbons Produced from Furfuryl Alcohol.

The influence of NHNO and NHClO on the porous texture and structure development of activated carbons produced from a non-porous polymeric precursor synthesized from furfuryl alcohol has been studied. The non-doped counterparts were prepared and studied for comparison purposes. NHNO and NHClO-doped polymers were carbonized under N atmosphere at 600 °C, followed by CO activation at 1000 °C and the obtained carbon materials and activated carbons were thoroughly characterized.

Carbon Dioxide Adsorption over Activated Carbons Produced from Molasses Using HSO, HPO, HCl, NaOH, and KOH as Activating Agents.

Cost-effective activated carbons for CO adsorption were developed from molasses using HSO, HPO, HCl, NaOH, and KOH as activating agents. At the temperature of 0 °C and a pressure of 1 bar, CO adsorption equal to 5.18 mmol/g was achieved over activated carbon obtained by KOH activation.

Chromatographic properties of hydrogenated microdiamond synthesized by high pressure and high temperature.

Adsorption and chromatographic properties of oxidized and hydrogenated 'high pressure and high temperature' synthesised diamond (HPHT) are studied using high-performance liquid chromatography. The retention factors of organic cation (benzyltributylammonium chloride), weak base (aniline), weak acid (benzoic acid), strong acid (benzenesulfonic acid), hydrophobic toluene, and hydrophilic uracil are obtained at varied pH, organic solvent content, and ionic strength of mobile phase. Both adsorbents exhibited moderate polarity with a mixed-mode retention mechanism with a combination of electrostatic, hydrophobic and hydrophilic interactions.

Activated Carbon Modification towards Efficient Catalyst for High Value-Added Products Synthesis from Alpha-Pinene.

DT0-activated carbons modified with HCl and HNO acids, which were used for the first time in the catalytic process of alpha-pinene isomerization, are presented in this study. The carbon materials DT0, DT0_HCl, DT0_HNO, and DT0_HCl_HNO were examined with the following methods: XRF, SEM, EDX, XPS, FT-IR, XRD, and N adsorption at -196 °C. It was shown that DT0_HCl_HNO-activated carbon was the most active material in the alpha-pinene isomerization process.

FeCl-Modified Carbonaceous Catalysts from Orange Peel for Solvent-Free Alpha-Pinene Oxidation.

The work presents the synthesis of FeCl-modified carbonaceous catalysts obtained from waste orange peel and their application in the oxidation of alpha-pinene in solvent-free reaction conditions. The use of waste orange peel as presented here (not described in the literature) is an effective and cheap way of managing this valuable and renewable biomass. FeCl-modified carbonaceous materials were obtained by a two-stage method: in the first stage, activated carbon was obtained, and in the second stage, it was modified by FeCl in the presence of HPO (three different molar ratios of these two compounds were used in the studies).

Activated Carbons Obtained from Orange Peels, Coffee Grounds, and Sunflower Husks-Comparison of Physicochemical Properties and Activity in the Alpha-Pinene Isomerization Process.

This work presents studies on the preparation of porous carbon materials from waste biomass in the form of orange peels, coffee grounds, and sunflower seed husks. The preparation of activated carbons from these three waste materials involved activation with KOH followed by carbonization at 800 °C in an N atmosphere. This way of obtaining the activated carbons is very simple and requires the application of only two reactants.

Fabrication of Antibacterial Metal Surfaces Using Magnetron-Sputtering Method.

One-hundred-nanometer films consisting of silver, copper, and gold nanocrystallites were prepared, and their antibacterial properties were quantitatively measured. The magnetron-sputtering method was used for the preparation of the metallic films over the glass plate. Single- and double-layer films were manufactured.

Extreme Enlargement of the Inverted Repeat Region in the Plastid Genomes of Diatoms from the Genus .

We sequenced the plastid genomes of three diatoms from the genus , including two strains formerly designated as . At 208,097 and 216,580 bp, the plastid genomes of the latter strains are the largest ever sequenced among diatoms and their increased size is explained by the massive expansion of the inverted repeat region. Important rearrangements of gene order were identified among the two populations of cf.

Photocatalytic oxidation of nitric oxide over AgNPs/TiO-loaded carbon fiber cloths.

Series of AgNPs/TiO-loaded carbon fiber cloth (CFC) composites were prepared by incorporation of pristine TiO and three AgNPs-modified TiO additives onto the surface of four commercial CFCs. AgNPs/TiO photocatalysts were synthesized by the wet impregnation method, including NaBH reduction of silver ions. The silver content in the modified photocatalyst was assessed by inductively coupled plasma optical emission spectrometry (ICP-OES) as well as XRD analysis.

Antibacterial properties of TiO modified with reduced graphene oxide.

In this paper, the antibacterial activity of titanium dioxide modified with reduced graphene oxide (rGO) was presented. TiO/rGO photocatalysts were prepared by the hydrothermal method under elevated pressure at 180°C and heated at 100°C in Ar flow. The obtained photocatalysts were characterized by means of XRD, FTIR/DRS, UV-vis/DR, Raman spectroscopy and scanning electron microscopy (SEM).