T he purpose of this study was to compare bone promotion around implants which were augmented with ePTFE membranes alone or in combination cortical demineralized freeze‐dried (DFDB) the platelet derived growth factor‐BB (PDGF) and insulin like factor I (PDGF/IGF‐I). Membranes placed over titanium had been inserted into fresh extraction sockets large buccal dehiscences. Twenty‐four 4 dogs. At 18 weeks clinical height measurements taken, animals sacrificed, all specimens retrieved for...

T his study examined histologic and histometric responses to 2 bioabsorbable membranes made from a synthetic copolymer of glycolide lactide. They were tested for their biocompatibility, resorption characteristics, ability support periodontal regeneration. Expanded polytetrafluoroethylene (ePTFE) was used as control. Nine fox hound dogs with no disease used. sedated teeth thoroughly scaled root planed. Plaque control maintained. Two weeks later, each dog anesthetized using gas anesthesia....

Abstract Aim: To evaluate the effect of using guided bone regeneration (GBR) with a titanium‐reinforced e‐PTFE membrane in alveolar defects titanium implants. Material and methods: Following extraction three mandibular premolars molar on both sides jaw dogs, (depth: 5–7 mm) were produced. After 4 months, implants inserted into each defect to depth approximately mm, so that their coronal portion was protruding about 5 mm. Four dogs assigned test group remaining two control group. The 12...

Biofuel quality control involves the determination of metal and metalloid content.

The benefits of using a 350 °C heated single pass spray chamber following segmented flow injection methodology were demonstrated for the analysis petroleum products through inductively coupled plasma atomic emission spectrometry (ICP-OES). present work shows that small sample volume (i.e., 5 μl or less) can be precisely injected into system manual procedure. Two different introduction systems employed: Cyclonic and (a modified version Torch Integrated Sample Introduction System, TISIS)...

A proof of concept study involving the online coupling automatic dispersive liquid-liquid microextraction (DLLME) to inductively coupled plasma optical emission spectrometry (ICP OES) with direct introduction and analysis organic extract is herein reported for first time. The flow-based analyzer features a lab-in-syringe (LIS) setup an integrated stirring system, Meinhard nebulizer in combination heated single-pass spray chamber, rotary injection valve, used as interface between system...

Abstract The pollination specialisation/generalisation continuum is a basic concept in biology, usually defined as the number of species or functional groups pollinators visiting plant species. level specialisation can be affected by relative abundance on flowers, among-pollinator variation per-visit efficiency and intra-population floral traits. Here, we explore how these components influence degree generalisation Mediterranean herb, Moricandia arvensis (Brassicaceae). shows remarkable...

Abstract In this study, a pioneering cascade method involving ultrasound-assisted extraction (UAE) and Box–Behnken Design (BBD) was optimized to valorize pineapple core waste by the sequential of, firstly phenolic compounds and, secondly, carotenoids. The effectiveness of evaluated based on total polyphenol content (TPC) antioxidant activity using 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) ferric reducing power (FRAP) assays. Characterization carotenoids performed...

An innovative approach for routine arsenic quantification in complex tire pyrolysis oil matrices by combining a high temperature torch integrated sample introduction system (hTISIS) with ICP-MS/MS is presented. Tire pyrolysis...

A simple, rapid and sensitive multiresidue method has been developed for the determination in vegetables of organophosphorus pesticides commonly used crop protection. Pesticide residues are extracted from samples with a small amount ethyl acetate anhydrous sodium sulfate. No additional concentration cleanup steps necessary. Analyses performed by large volume GC injection using through oven transfer adsorption desorption (TOTAD) interface. The calculated limits detection each pesticide...

Silicon is present in petrol products under very different chemical forms. The effect of the silicon form on sensitivity was studied by inductively coupled plasma atomic emission spectrometry (ICP-AES). Solutions containing sixteen organic compounds with same concentration were prepared xylene. were: six siloxanes, nine silanes and a silicate. Their boiling points ranged from 101 °C (hexamethyldisiloxane) to 310 (2,3,4-(epoxycyclohexyl)ethyltrimetoxysilane). results indicated that ICP-AES...

A heated Torch Integrated Sample Introduction System (hTISIS) has been applied to the analysis of petroleum products and biofuels through Inductively Coupled Plasma Mass Spectrometry (ICP-MS). Three elements have determined because their importance in industry: V, Ni Mn. injection accomplished by means introduction a low sample volume (2.5 μl) into an air carrier stream. peak thus obtained. Two sets samples selected: five solvents (xylene, kerosene, nonane, undecane hexadecane) real...

Abstract The present work delves into the feasibility of employing a novel structured sorbent referred to as GFAD (Guefoam Adsorption Device) for determination volatile organic compounds (VOCs) in liquid samples. chosen method has been static headspace sorptive extraction-thermal desorption gas chromatography mass spectrometry (HSSE-TD-GC–MS). comprises an aluminum cellular material with distinct replication structure and solid guest phase consisting activated carbon particles dispersed...

A method based on the use of a high temperature single pass spray chamber and injection sample plug into an air carrier gas stream was developed to mitigate non spectral interferences caused by organic samples petroleum products reduce plasma loading in Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES). The studied solvents were eleven alkanes (hexane, heptane, octane, nonane, decane, undecane, dodecane, tridecane, tetradecane, pentadecane, hexadecane), xylene, kerosene...

It has been shown previously that the influence of silicon chemical form could be minimized in ICP-AES by using high efficiency sample introduction systems. In this work, effects two most different forms have near total consumption The tested devices a single pass spray chamber equipped with wall heating (heated torch integrated system, h-TISIS) and demountable direct injection nebulizer (d-DIHEN). A room temperature TISIS cyclonic taken as reference Solutions containing six compounds xylene...

The effects of the solvent dilution factor on physical properties resulting organic solutions, aerosol characteristics and silicon sensitivity were studied in ICP-AES for four different petroleum products by using near total sample consumption systems. samples two gasoline having very volatilities along with a kerosene diesel sample. Petroleum product diluted xylene dilutions; 1 : 2, 5, 10 50. introduction systems single pass spray chamber associated micronebulizer demountable Direct...