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Stephen Neidle
Professor Stephen Neidle is a British X-ray crystallographer, chemist and drug designer working at the UCL School of Pharmacy. His area of scientific research has been in nucleic acid structure and recognition, and the research topic of quadruplexes. Early life, education and career Stephen Neidle was born in London and educated at Hendon County Grammar School. He received a bachelor's degree in chemistry, a Ph.D. in X-ray crystallography supervised by Donald Rogers (during which he solved the structure of streptomycin). and a D.Sc. in 1995, all from Imperial College London. He received an ICI Fellowship for X-ray crystallographic studies with Michael B. Hursthouse at Queen Mary University of London working on natural products and pyrrole-based compounds. Subsequently he moved to the Biophysics Department, King's College London to work on the single crystal X-ray structures of nucleic acid and nucleic acid-drug complexes and was awarded a CRC (now CRUK) Career Development Aw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crystallography
Crystallography is the experimental science of determining the arrangement of atoms in crystalline solids. Crystallography is a fundamental subject in the fields of materials science and solid-state physics (condensed matter physics). The word "crystallography" is derived from the Greek word κρύσταλλος (''krystallos'') "clear ice, rock-crystal", with its meaning extending to all solids with some degree of transparency, and γράφειν (''graphein'') "to write". In July 2012, the United Nations recognised the importance of the science of crystallography by proclaiming that 2014 would be the International Year of Crystallography. denote a direction vector (in real space). * Coordinates in ''angle brackets'' or ''chevrons'' such as <100> denote a ''family'' of directions which are related by symmetry operations. In the cubic crystal system for example, would mean 00 10 01/nowiki> or the negative of any of those directions. * Miller indices in ''parentheses ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anticancer
An anticarcinogen (also known as a carcinopreventive agent) is a substance that counteracts the effects of a carcinogen or inhibits the development of cancer. Anticarcinogens are different from anticarcinoma agents (also known as anticancer or anti-neoplastic agents) in that anticarcinoma agents are used to selectively destroy or inhibit cancer cells ''after'' cancer has developed. Interest in anticarcinogens is motivated primarily by the principle that it is preferable to prevent disease (preventive medicine) than to have to treat it ( rescue medicine). In theory, anticarcinogens may act via different mechanisms including enhancement of natural defences against cancer, deactivation of carcinogens, and blocking the mechanisms by which carcinogens act (such as free radical damage to DNA). Confirmation that a substance possesses anticarcinogenic activity requires extensive ''in vitro'', ''in vivo'', and clinical investigation. Health claims for anticarcinogens are regulated by v ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dan Neidle
Dan Neidle is a British tax lawyer and commentator, who researches and writes on issues of tax law and tax policy. He founded Tax Policy Associates, a non-profit which advises policymakers and journalists on tax policy. Legal career Neidle worked as a tax lawyer at international law firm Clifford Chance for 23 years, becoming its UK head of tax in 2020. Described by taxation law specialist Jolyon Maugham and tax publication ''ITR (magazine), ITR'' as possibly the UK's leading tax lawyer, his practice covered tax, cryptocurrency, public law and Brexit. He has been critical of schemes used by prominent individuals and companies to tax avoidance, avoid tax, in favour of increased HM Revenue and Customs, HMRC prosecution of aggressive tax avoidance and evasion, and in favour of windfall taxes on Petroleum industry, oil and gas producers (but did not support the investment allowances proposed in the Government of the United Kingdom, UK Government's 2022 oil and gas windfall tax, saying ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bioorganic & Medicinal Chemistry Letters
''Bioorganic & Medicinal Chemistry Letters'' is a scientific journal focusing on the results of research on the molecular structure of biological organisms and the interaction of biological targets with chemical agents. It is published by Elsevier, which also publishes ''Bioorganic & Medicinal Chemistry ''Bioorganic & Medicinal Chemistry'' is a scientific journal focusing on the results of research on the molecular structure of biological organisms and the interaction of biological targets with chemical agents.Bioorganic & Medicinal Chemistry' It ...'' for longer works. Biochemistry journals Elsevier academic journals English-language journals Medicinal chemistry journals {{biochem-journal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Google Scholar
Google Scholar is a freely accessible web search engine that indexes the full text or metadata of scholarly literature across an array of publishing formats and disciplines. Released in beta in November 2004, the Google Scholar index includes peer-reviewed online academic journals and books, conference papers, theses and dissertations, preprints, abstracts, technical reports, and other scholarly literature, including court opinions and patents. Google Scholar uses a web crawler, or web robot, to identify files for inclusion in the search results. For content to be indexed in Google Scholar, it must meet certain specified criteria. An earlier statistical estimate published in PLOS One using a mark and recapture method estimated approximately 80–90% coverage of all articles published in English with an estimate of 100 million.''Trend Watch'' (2014) Nature 509(7501), 405 – discussing Madian Khabsa and C Lee Giles (2014''The Number of Scholarly Documents on the Public W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
H-index
The ''h''-index is an author-level metric that measures both the productivity and citation impact of the publications, initially used for an individual scientist or scholar. The ''h''-index correlates with obvious success indicators such as winning the Nobel Prize, being accepted for research fellowships and holding positions at top universities. The index is based on the set of the scientist's most cited papers and the number of citations that they have received in other publications. The index has more recently been applied to the productivity and impact of a scholarly journal as well as a group of scientists, such as a department or university or country. The index was suggested in 2005 by Jorge E. Hirsch, a physicist at UC San Diego, as a tool for determining theoretical physicists' relative quality and is sometimes called the Hirsch index or Hirsch number. Definition and purpose The ''h''-index is defined as the maximum value of ''h'' such that the given author/jo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
UCL Business
UCL Business PLC is the technology-transfer company of University College London Hospital NHS Foundation Trust in London, England. Its head office is on Tottenham Court Road in the London Borough of Camden. History UCL's first technology-transfer company was named in the Pandora papers for the widespread use of offshore companies and use of third party ownership and payments to avoid UCL and government oversight. UCL Ventures merged with the technology-transfer company of the Royal Free Hospital The Royal Free Hospital (also known simply as the Royal Free) is a major teaching hospital in the Hampstead area of the London Borough of Camden. The hospital is part of the Royal Free London NHS Foundation Trust, which also runs services at Barn ..., Freemedic plc (founded in 1993) to form UCL Biomedica PLC. The former UCL Business had been established to force academics through the use of NDA's to sign over any IP to UCL, thereby aiding the development of commercially valuabl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nucleic Acid Structure
Nucleic acid structure refers to the structure of nucleic acids such as DNA and RNA. Chemically speaking, DNA and RNA are very similar. Nucleic acid structure is often divided into four different levels: primary, secondary, tertiary, and quaternary. Primary structure Primary structure consists of a linear sequence of nucleotides that are linked together by phosphodiester bond. It is this linear sequence of nucleotides that make up the primary structure of DNA or RNA. Nucleotides consist of 3 components: # Nitrogenous base ## Adenine ## Guanine ## Cytosine ## Thymine (present in DNA only) ## Uracil (present in RNA only) # 5-carbon sugar which is called deoxyribose (found in DNA) and ribose (found in RNA). # One or more phosphate groups. The nitrogen bases adenine and guanine are purine in structure and form a glycosidic bond between their 9 nitrogen and the 1' -OH group of the deoxyribose. Cytosine, thymine, and uracil are pyrimidines, hence the glycosidic bonds form betwe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clostridioides Difficile Infection
''Clostridioides difficile'' infection (CDI or C-diff), also known as ''Clostridium difficile'' infection, is a symptomatic infection due to the spore-forming bacterium ''Clostridioides difficile''. Symptoms include watery diarrhea, fever, nausea, and abdominal pain. It makes up about 20% of cases of antibiotic-associated diarrhea. Antibiotics can contribute to detrimental changes in gut microbiota; specifically, they decrease short-chain fatty acid absorption which results in osmotic, or watery, diarrhea. Complications may include pseudomembranous colitis, toxic megacolon, perforation of the colon, and sepsis. ''Clostridioides difficile'' infection is spread by bacterial spores found within feces. Surfaces may become contaminated with the spores with further spread occurring via the hands of healthcare workers. Risk factors for infection include antibiotic or proton pump inhibitor use, hospitalization, other health problems, and older age. Diagnosis is by stool culture or t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phases Of Clinical Research
The phases of clinical research are the stages in which scientists conduct experiments with a health intervention to obtain sufficient evidence for a process considered effective as a medical treatment. For drug development, the clinical phases start with testing for safety in a few human subjects, then expand to many study participants (potentially tens of thousands) to determine if the treatment is effective. Clinical research is conducted on drug candidates, vaccine candidates, new medical devices, and new diagnostic assays. Summary Clinical trials testing potential medical products are commonly classified into four phases. The drug development process will normally proceed through all four phases over many years. If the drug successfully passes through Phases I, II, and III, it will usually be approved by the national regulatory authority for use in the general population. Phase IV trials are 'post-marketing' or 'surveillance' studies conducted to monitor safety over sever ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ridinilazole
Ridinilazole (previously known as SMT19969) is an investigational small molecule antibiotic being evaluated for oral administration to treat ''Clostridioides difficile'' infection (CDI). In vitro, it is bactericidal against ''C. difficile'' and suppresses bacterial toxin production; the mechanism of action is thought to involve inhibition of cell division. It has properties which are desirable for the treatment of CDI, namely that it is a narrow-spectrum antibiotic which exhibits activity against ''C. difficile'' while having little impact on other normal intestinal flora and that it is only minimally absorbed systemically after oral administration. At the time ridinilazole was developed, there were only three antibiotics in use for treating CDI: vancomycin, fidaxomicin, and metronidazole. The recurrence rate of CDI is high, which has spurred research into other treatment options with the aim to reduce the rate of recurrence. , two phase II trials have been completed and two phas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prostate Cancer
Prostate cancer is cancer of the prostate. Prostate cancer is the second most common cancerous tumor worldwide and is the fifth leading cause of cancer-related mortality among men. The prostate is a gland in the male reproductive system that surrounds the urethra just below the bladder. It is located in the hypogastric region of the abdomen. To give an idea of where it is located, the bladder is superior to the prostate gland as shown in the image The rectum is posterior in perspective to the prostate gland and the ischial tuberosity of the pelvic bone is inferior. Only those who have male reproductive organs are able to get prostate cancer. Most prostate cancers are slow growing. Cancerous cells may spread to other areas of the body, particularly the bones and lymph nodes. It may initially cause no symptoms. In later stages, symptoms include pain or difficulty urinating, blood in the urine, or pain in the pelvis or back. Benign prostatic hyperplasia may produce similar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
