Monthly Archives: June 2017

The capillary web gets lost in diseased kidneys

Main functions of the kidney are regulating ions, pH, fluid balance and blood pressure and disposing of metabolic waste products. These functions are dependent on properly working renal blood vessels, including the smallest ones, the so called

Puberty changes how adolescents remember peer faces

Together with voices, faces are the most important source of social information for humans, even prior to birth. What is equally important to know is how the kinds of information we pay most attention to in faces

Time is Brain. Rupture of a brain aneurysm and the patients journey to the neurosurgical center

In brain infarction or traumatic injuries of the brain an immediate admission to a neurosurgical / neurological center can be life saving. With brain hemorrhages caused by a ruptured aneurysm the situation is not as clear. First

Mechanisms of diuretic plants: an overview

Ongoing research suggests several molecular mechanisms that were correlated with acute or prolonged diuretic activity of different natural products. So, it is not surprising that research on this subject is at the forefront of research on the

New strategy for the degradation of persistent pollutants in water

An hybrid solid system for the degradation of persistent pollutants was realized by mixing titanium dioxide, silica and an enzyme extracted from soybean hulls. Removal of organic pollutants from urban and industrial wastewaters is one of the

A covert authentication and security solution for GMOs

Significantly increasing worldwide utilization of genetically modified organisms (GMOs) presents challenges to ensure security, authenticity and validation of material goods and legal agreements. Similarly to the evolution witnessed in Internet protocols, strategic focus is required to anticipate,

Evolution of aquatic mammals and birds: the present predicts the past

The movement of vertebrates from the water to the land has been considered one of the great evolutionary transformations in history. However of equal evolutionary importance was the re-invasion of the aquatic environment by various groups of

The worldwide prevalence and phenotypic features of polycystic ovary syndrome

PCOS is the most common endocrine disorder among women of reproductive age. Although many studies have investigated the prevalence of PCOS, there are discrepancies in their results. Even using the same subset of diagnostic criteria, the reasons

The distressful life of FtsZ-deprived bacteria

Failure to assemble a division septum occurs in Escherichia coli cells when their supply of FtsZ is blocked. FtsZ, ancestor of eukaryotic Tubulin, is the main component of the divisome, the molecular machinery that drives septation in

Studying potential endocrine disrupting chemicals: comparison of yeast and human cell-based in vitro assays

The production of chemicals for agricultural and industrial use, cosmetics or food additives is steadily increasing. To protect the environment and human health against the potential risks arising from these man-made chemicals, the authorities introduced several programs

Limiting environment speeds up the opening of serotinous cones and decreases aerial cone banks

Serotiny, the maintenance of closed cones after maturation (Fig. 1), is a key adaptive trait of plants in fire-prone environments. However, in moderately serotinous species, cones may open in the absence of fire under hot and dry

Screening sunscreens: protecting the biomechanical barrier of skin from ultraviolet radiation damage

The uppermost layer of human skin, known as the stratum corneum (SC), is the most important physical barrier between the human body and the environment and plays a surprisingly acute role in the mechanical function of full

A sticky, flexible and strong material for better dentistry

Restorations of endodontically treated teeth represent a big part of modern restorative treatment. A post and core should be fabricated to provide retention for the coronal restoration- most often an indirectly made crown. Traditionally metal cast post

Glucose – a bitter sweet for the brain

During ischemic stroke, insufficient supply of oxygen and glucose leads to severe damage of cerebral tissue. Since the most important energy substrate for the brain is glucose, high blood sugar levels could be a strategy to enhance

A curious eighteenth century travelling theodolite

An old topographic compass displayed in a showroom at the Museum of Astronomy and Related Sciences (MAST) in Rio de Janeiro, Brazil (Fig. 1), took my curiosity namely because of its resemblance to a theodolite described by

Key genes for amniote organ regeneration detected in lizard transcriptomes shed new hope for limb regeneration in humans

While in water-adapted vertebrates (anamniotes: fish and amphibians) organ regeneration is relevant or outstanding, including in fins or limbs, in fully terrestrial vertebrates (amniotes: reptiles, birds and mammals) regeneration is absent or rare. Aside numerous anatomical and