نتایج جستجو برای: sepiolite
تعداد نتایج: 436 فیلتر نتایج به سال:
DNA manipulation is crucial for many biotechnological prospects and medical applications such as gene therapy. This requires the amplification extraction of from bacteria transfer these molecules into cells, including bacterial mammalian cells. The capacity natural magnesium silicate clay mineral sepiolite to bind makes it a potentially useful tool biotechnological/medical strategies. In additi...
This research aims to develop a new strategy valorize wasted COVID-19 masks based on chemical recycling by pyrolysis convert them into useful products. First, surgical and filtering face piece masks, as defined in Europe the EN 149 standard (FFP2), were thermally pyrolyzed at temperatures of 450, 500, 550 °C, yields valuable solid (biochar), liquid (biooil), syngas products their characteristic...
Background and Purpose: Soil remediation in contaminated soils is an important factor of environmental research. This research evaluated the effect of sepiolite, palygorskite, and triple super phosphate (TSP) on decreasing the heavy metals uptake by wheat cultivars inoculated with Piriformospora indica (P. indica). Materials and Methods: Treatments included applying sepiolite, palygorskite (at...
BACKGROUND Sepiolite is an absorbent clay that is used as pet litter. It forms thin crystals, which are a transition between chain and layered silicates. Inhalation studies in animals have shown no evidence of pulmonary damage. This paper reports a cross sectional study of the total work force of the largest sepiolite production plant in the world. METHODS Two hundred and eighteen workers (21...
This study evaluated the synergism between several P-solubilizing fungi isolates and arbuscular mycorrhizal fungi to improve clover ( Trifolium pratense) growth in the presence of Araxá apatite. Clover was sown directly in plastic pots with 300g of sterilized washed sand, vermiculite and sepiolite 1:1:1 (v:v:v) as substrate, and grown in a controlled environment chamber. The substrate was ferti...
مطالعه تاثیر زمان، دما، اسیدیته و غلظت اورهآز بر جذب و فعالیت آنزیم در رسهای سپیولیت و ورمیکولیت
Urease is one of the most important enzymes in nitrogen cycle. The clay particles (with high surface area) play an important role in the stability of these protein compounds (enzymes) against various environmental factors. In order to examine the interactions between urease with sepiolite and vermiculite, three in vitro experiments were conducted separately in a completely randomized design. Tw...
The purpose of this paper was to determine the possible employment of three groups of phyllosilicates (two smectites, three palygorskites, and two sepiolites) as direct-compression tablet excipients. Compact lots of each material were obtained after application of three different compression loads and the elastic recoveries and tensile strengths of each lot were then determined. The results sho...
Fibers like particles are more and more used as basic components of elctrorheological ( ER ) and magnetorheological (MR) suspensions because of their lower sedimentation rate andhigher yield stress. The theoretical approach of the yield stress mainly rests on the interaction between two spherical particles. We analyze the interactions between fibers , taking into account the contribution of fri...
The filtration behaviour of some clay–water dispersions was studied. Two Spanish fibrous phyllosilicates (sepiolite from Vicálvaro and palygorskite from Turón) and a commercial bentonite (Bentopharm©, UK) with similar sizes and different morphologies (fibrous and/or laminar) were selected as model clays. Sepiolite from Vicálvaro is an almost pure fibrous sample, Bentopharm© presents a high amou...
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