Polymers derived from monomer Schiff bases are generally synthesized by polycondensation reaction between diamine and a dialdehyde or diketone. The major handicap of Schiff base polymers (SBPs) is their inadequate solubility in most organic solvents because of the rigid chain structure of polymers. The insertion of flexible bonds between main chain aromatic rings is a kind of example to carry off the solubility limitation properties of SBP. In the present study I tried to emphasize the versatile and useful aspects of different kinds of ligands and their polymer compounds with their current interested properties and applications. Presenting good mechanical strength, well-chosen thermal stability, metal chelating ability, nonlinear optical, semi-conducting liquid crystal and fiber-forming properties are the particular classifications of the aromatic polyazomethines or Schiff base polymers. And also these kinds of compounds may lead to treat some medical disease with the effects of DNA cleavage.
India has been known from prehistoric times as the land of spices. India possesses many innate advantages over other spice producing countries - its large genetic base, varied soil and climatic conditions and skilled human power. However, black pepper productivity is low in India. Poor soil fertility, use of low level of inputs like manures, fertilizers and crop protection measures, high labour cost and crop loss due to diseases, lack of resistant varieties and post-harvest losses are the major reasons for the low productivity. The biggest handicap in black pepper export is the high cost of the production. Concerted efforts for producing clean black pepper at competitive prices are urgently needed. In this back ground, the present study was carried out to to apply the latest econometric models to analyse the production and export performance of black pepper and suggest relevant policy measures.
Arsenic contamination of groundwater is a major public health problem in India. Essentially, the arsenic contamination occurred due to excessive usage of groundwater in agriculture that in turn has changed geological pattern and resulted in leaching of arsenic into aquifers. West Bengal is the worst affected state in the country. Millions of people have been suffering from various forms of adverse health manifestations due to drinking of contaminated water. There are numerous studies pertaining to clinical manifestations of chronic arsenicosis due to long-term intake of contaminated water. However, there are very few studies addressing social factors responsible for development of symptoms, impacts of symptoms on their live roles and complex dynamics of environmental, physical and social factors. The study showed that apart from magnitude of arsenic exposure, socioeconomic status, gender, malnutrition, access to health care played a major role in occurrence and distribution of chronic arsenicosis. Moreover, the consequences in the form of disability and handicap have also been determined by the aforementioned social factors.
Achieving optimum dental aesthetics is a difficult and challenging task. Fixed dental restorations play a major role in dental aesthetics. Metal ceramic and all-ceramic restorations are most commonly used in clinical practice. Metal ceramic restorations are known for its strength and reasonable aesthetics. Traditionally Metal ceramic restorations incorporate a collar which is in fact an aesthetic handicap, as the metal collar blocks light transmission through the tooth structure, darkens the root and cause discoloration of gingiva adjacent to the restoration. Generally all ceramic restorations are known for increased light transmission and diffusion. Absence of metal collar in all-ceramic restorations minimizes or in fact eliminates undesirable effects produced by the metal collar. However Zirconia in all-ceramic restorations has opacity and its optical behavior has been considered similar to metal. Both in metal and all ceramic restorations, the cervical region challenges the aesthetic achievement. Hence employing cutback in the substructure is considered to be a viable technique which can bring aesthetic improvement.
Revision with unchanged content. Wireless multihop networks exhibit a number of distinctive and interesting properties, making them a unique environment. This environment is very challenging for existing network protocols, in particular for the Internet protocol stack. For this reason the peculiarities of wireless multihop environ ments have most often been treated as a major handicap. Here, we look at them from a different angle: they can, in fact, often provide the basis for novel and unconventional solutions. Many challenges in wireless multihop net working can be tackled by making use of the network's specific properties. In this spirit, we propose solutions that communicate and co-ordinate actions implicitly, i.e., without dedicated information exchange. This design principle is applied to a number of research challenges in wireless multihop networks. The discussed approaches include mechanisms for unicast and multicast congestion control, end-to-end reliable transport, co-ordinated network coding, and offline time synchronization. This book addresses readers interes ted in computer networking and protocol design, in particular researchers and developers working on wireless multihop networks.
Ayurveda, the Indian system of medicine is an ancient science of diagnosis and treatment of various ailments. When we consider about the prevalence of various diseases, every year worldwide near about 10-20% of the patients seeking medical advice suffers from skin diseases. Diseases of the skin account for a great deal of misery, suffering, incapacity, and economic loss. Beside this, person suffering from the skin disease consider themselves as a great handicap in the society. Ayurveda has its own principles of diagnosing and treatment of various skin diseases under the head of Kushtha. This book 'SKIN DISEASES - Principles of Diagnosis & Treatment in Ayurveda,' is written for medical students especially working in the field of Ayurveda, doctors trying to get (re)acquainted with Ayurvedic dermatology and other paramedical staff including nurses working in Ayurvedic hospitals and Nursing homes who are always interested in this topic. Within the 32 chapters of this book, all the major needs are fulfilled by defining the role of Ayurveda in the management of most of the skin diseases.
High Quality Content by WIKIPEDIA articles! Sailor (foaled 1952 in Kentucky) was an American Thoroughbred racehorse. Bred and raced by heiress Isabel Dodge Sloane's Brookmeade Stable, he was out of the Brookmeade mare Flota and sired by U.S. Racing Hall of Fame inductee, Eight Thirty. Sailor was conditioned for racing by Hall of Fame trainer, Preston Burch. As a three-year-old in 1955, the colt did not run in any of the U.S. Triple Crown races. However, under regular rider Hedley Woodhouse he won four major races that year including the prestigious Pimlico Special at Pimlico Race Course in Baltimore. At age four he began the year competing in Florida where he won the Gulfstream Park Handicap then back at Pimlico Race Course he captured the John B. Campbell Handicap, at the time a race of national importance.
Mordecai Peter Centennial Brown (October 19, 1876 February 14, 1948), nicknamed "Three Finger" or "Miner", was an American Major League Baseball pitcher at the turn of the 20th century. Due to a farm-machinery accident in his youth, Brown lost parts of two fingers on his right hand and eventually acquired his nickname as a result. Overcoming this handicap and turning it to his advantage, he became one of the elite pitchers of his era. Brown was elected to the Baseball Hall of Fame in 1949. Brown was born in Nyesville, Indiana. He was also known as "Miner", having worked in western Indiana coal mines for a while before beginning his professional baseball career. Nicknames like "Miner" and "Three Finger" (or sometimes "Three-Fingered") were headline writers' inventions. To fans and friends he was probably best known as "Brownie". To his relatives and close friends, he was also known as "Mort".