Novel Class-AB Operational Amplifier for Compact and Energy-Efficient Wake-Up Sensor Systems.

This paper presents a novel rail-to-rail Class-AB operational amplifier tailored for wake-up systems in motion sensor applications. By addressing limitations in free Class-AB designs, such as large inrush current, unstable bias conditions, and area ineffiiency, the proposed design achieves a gain of 59 dB and unity gain frequency of 550 kHz driving a 5 pF load. The inrush current is reduced from 1 mA to 7 µA, increasing the battery life.

Prenatal Diagnosis and Management of a Rare Central Tendon Defect Type of Congenital Diaphragmatic Hernia with a Massive Pericardial Effusion.

The central tendon defect type of congenital diaphragmatic hernia (CDH) is extremely rare and usually associated with a significant pericardial effusion. Prenatal diagnostic ultrasound features of this quite rare entity remain often overlooked or misdiagnosed. There is a dearth of literature about the role of prenatal intervention, often through an elective pericardiocentesis, for the prevention of lung hypoplasia and to decrease the overall neonatal morbidity and mortality.

Risk factors, management and outcomes of patients admitted with near fatal asthma to a tertiary care hospital in Riyadh.

Rationale: Near-fatal asthma (NFA) has not been well studied in Saudi Arabia. We evaluated NFA risk factors in asthmatics admitted to a tertiary-care hospital and described NFA management and outcomes.

Materials And Methods: This was a retrospective study of NFA patients admitted to an ICU in Riyadh (2006-2010).

An inexpensive alternative to routine section adhesives for histology: the mucilaginous substance of the Assyrian plum.

We found that the mucilaginous substance of the Assyrian plum, Cordia myxa, can be used as an adhesive for attaching sections of animal tissues to slides. Unlike Mayer's albumen, this material left no stainable residue and had no noticeable effect on the histological structure of the tissue sections. The mucilaginous substance of C.

Characterization of Enterococcus faecium isolates and first report of vanB phenotype-vanA genotype incongruence in the Middle East.

We aimed to characterize the vancomycin genotype/phenotype, carriage of putative virulence genes, and genetic relatedness of Enterococcus faecium isolates in Saudi Arabia. E. faecium isolated from inpatients at our medical center were studied.