This paper presents several microwave power ampl~ier designs that promise high power and broad bandwidth, while meeting the eficiency and linearity requirements of advanced radar and communication systems. Power amplifiers are designed based on an ultra-high f~u~ (>450 GHz) selective buried sub-collector (SBSC) HBT technology [1]. SBSC HBTs are fabricated on prepatterned sub-collector mesas. Th...

Several studies have identified a subset of cancer cells, designated as tumor-initiating cells or cancer stem cells (CSCs), with the ability for self-renewal and differentiation into distinct cell lineages. In recent years, the hypothesis has emerged, and gained great momentum, that tumors are hierarchically arranged, with CSCs being the principal drivers of tumor growth for proliferation, resi...

introduction: maintaining soil moisture content at about field capacity and reducing water loss in near root zone plays a key role for developing soil and water management programs. clay pot or porous pipe is a traditional sub-irrigation method and is ideal for many farms in the world’s dry land with small and medium sized farms and gardens and is still used limitedly in dry lands of india, ira...

This study examined the contributions of genetic variation to individual differences in ability to pay attention. Specifically, we examined a subcapacity version (Ile89Val) of the high affinity choline transporter, a protein important in regulating the brain’s acetylcholine levels, and tested the hypothesis that it would influence the ability to modulate attention. In Experiment 1, subjects wer...

Current issues in the management of clinically negative inguinal lymph nodes in squamous cell carcinoma of the anal canal. Quality of the available evidence. Background The first line of management of squamous cell carcinoma (SCC) of the anal canal is chemo-radiation. The radiation field includes, in addition to the anal region and the perirectal nodes, the iliac and both inguinal triangles to ...

Few topics have generated more debate and contro­ versy in the scientific literature over the past few years than the biological and behavioural origins of an a to ­ mically ‘m odern’ hum an populations: i.e. populations belonging to our own form of Homo sapiens sapiens. W hat is common ground in all these debates is that populations that were fundam entally ‘m odern’ in both a basic anatom ica...

Carbenicillin was introduced in therapeutics in 1967 and was especially useful, on its own or when associated with aminoglycosides, for the treatment of infections caused by Pseudomonas aeruginosa (23), a well-recognized nosocomial pathogen with intrinsic resistance to various antimicrobial agents and the ability to develop multidrug resistance (18). Nevertheless, an increasing frequency of P. ...

Introduction: Large bone defect remains difficult to treat because of limited availability of autologous bone grafts. In contrast, tissueengineering technique can generate large bone tissue using a small amount of autologous cells and therefore, provide an optimal solution. Bone marrow stromal cells (BMSCs) have the potential for multilineage (including osteogenic) differentiation and thus are ...

In 45 children (18-54 months), 28 pulpotomies, 26 indirect pulp therapies, and 27 pulpectomies were completed in primary incisors with 58 incisors acting as controls. Using clinical and radiographic evaluations, the success rate of pulpotomies, indirect pulp therapies, and pulpectomies did not differ statistically from comparable primary molar rates. Incisor pulpotomy success was 85.7% (mean fo...

We report the case of a 16-month-old girl with hypomelanosis of Ito, a relatively rare phenotype associated with neurocutaneous manifestations. The characteristic hypopigmented streaks along the Blaschko lines were associated with hypertrichosis of the genitals and shins, as well as musculoskeletal and dental anomalies. An underlying endocrinologic disorder of the hypertrichosis could be exclud...