In arid and semi-arid regions, pioneer organisms form complex communities that penetrate the upper millimetres of the bare substrate, creating biological soil crusts (BSC). These thin crusts play a vital role in whole ecosystem functioning because they enrich bare surfaces with organic matter, initiate biogeochemical cycling of elements, modify hydrological cycles, etc., thus enabling the groun...

Peloidal crusts are significant components of Early Cretaceous (Aptian) reef carbonates in eastern Spain. The crusts form steep-sided laminated deposits on coral and other skeletal surfaces. Their microfabric consists almost entirely of silt-sized peloids in fenestral microspar matrix. This microfabric contrasts with more poorly sorted and generally finer grained detrital wackestone– packstone ...

Cyanobacterial crusts, sensitive to changes in the moisture content, are widely distributed Ulan Buh Desert. Changes precipitation patterns due global climate change expected influence carbon emission and photosynthetic fixation of soil areas covered with cyanobacterial crusts. We assessed how amount frequency affect processes Crusts. Taking average August during past 30 years as control, we es...

Erythema multiforme (EM) is an uncommon acute mucocutaneous illness with target lesions primarily on the face and limbs. Slow-onset hypersensitivity reactions to infections (including herpes simplex virus mycoplasma pneumonia) medicines antibiotics, anticonvulsants, nonsteroidal anti-inflammatory drugs) cause EM. A 4-year-old male EM after taking metamizole, ampicillin, cloxacillin, unknown puf...

Sand dunes are often covered by vegetation and biogenic crusts. Despite their significant role in dune stabilization, biogenic crusts have rarely been considered in model studies of dune dynamics. Using a simple model, we study the existence and stability ranges of different dune-cover states along gradients of rainfall and wind power. Two ranges of alternative stable states are identified: fix...

in recent decades, as the result of industrial life, consuming fried and fast foods have increased significantly. excessive use of fat, especially saturated fats and trans fatty acids is one of the important factors that increases heart diseases, weight gain, and cancers. therefore, using effective methods for decreasing fat absorption not only retains desirable features but also seems essentia...

© 2017 Indian Dermatology Online Journal | Published by Wolters Kluwer Medknow A 1‐year‐old girl was brought to our clinic by her parents with the complaint of papulosquamous lesions covered with hemorrhagic crusts on the anterior trunk. The patient had developed erythematous squamous plaques on the scalp, inguinal region, and the face at the age of 3 months. The patient was given a therapy of ...

Abstract The present study deals with the set-up and development of a new methodology to quantify carbonaceous fraction (i.e., OC, organic carbon EC, elemental carbon) in black crusts samples on marble stone surfaces historical buildings monuments exposed outdoor pollution. It is worth noting that OC EC represent one main fractions atmospheric particulate matter and, mainly responsible for colo...