Xem 1-20 trên 32 kết quả Methods for breast
  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Novel Multistatic Adaptive Microwave Imaging Methods for Early Breast Cancer Detection

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  • S RECENTLY AS a few years ago, many nuclear medicine physicians would have taken the position that Cardiovascular Nuclear Medicine is now a static field. Similar perhaps in many ways to bone imaging, they would have suggested that all that is left to do is to make some detailed refinements of the techniques, but the big discoveries had been made. This issue and the second part of this issue of Seminars in Nuclear Medicine will certainly discredit that point of view. There are many, many new developments in this field.

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  • B REAST CANCER is the most common malignancy in women. At least 180,000 new cases were diagnosed in 1997, more than double that of the next most common neoplasm, lung cancer. According to the American Cancer Society over 40,000 American women succumb to this disease each year. Early detection of breast cancer by routine mammographic screening of women without clinical signs or symptoms facilitates earlier treatment and has enhanced survival. As pointed out by Dr.

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  • The LmbB1 protein, participating in the biosynthesis of lincomycin,was heterologously expressed inEscherichia coli, purified in its active form, and characterized as a dimer of identical subunits. Methods for purification and analysis of the LmbB1 reaction product were developed. Molecular mass and fragmentation pattern of the product revealed by capillary electrophoresis-mass spectrometry were in agree-ment with its proposed structure, 4-(3-carboxy-3-oxo-propenyl)-2,3-dihydro-1H-pyrrole-2-carboxylic acid.

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  • In North America maize is widely utilised due to the suitability of the climate and advances in Genetically Modified (GM) technology which assures consistency of the crop. In areas where conditions for growing maize are not suitable or irrigation is not possible, other crops containing high levels of starch such barley and wheat offer good substitutes. These crops are not harvested until they reach a late “milky dough” stage of maturation so that the levels of starch are maximised.

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  • Microcalorimetry and UV-vis spectroscopy were used to conduct thermodynamic and kinetic investigations of the scission of calf thymus DNA catalyzed by bleomycin A5 (BLM-A5) in the presence of ferrous ion and oxygen. The molar reaction enthalpy for the cleavage, the Michaelis– Menten constant for calf thymus DNA and the turnover number of BLM-A5 were calculated by a novel thermokinetic method for an enzyme-catalyzed reaction to be )577 ± 19 kJÆmol)1, 20.4 ± 3.8 lM and 2.28 ± 0.49 · 10)2 s)1, respectively, at 37.0 °C. This DNA cleavage was a largely exothermic reaction....

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  • The National Academy of Sciences is a private, nonprofit, self-perpetuating society of distinguished scholars engaged in scientific and engineering research, dedicated to the furtherance of science and technology and to their use for the general welfare. Upon the authority of the charter granted to it by the Congress in 1863, the Academy has a mandate that requires it to advise the federal government on scientific and technical matters. Dr. Ralph J. Cicerone is president of the National Academy of Sciences....

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  • Two studies in Africa evaluated the feasibility of using two visual inspection methods for cervical cancer screening and assessed their performance in the field; the methods were VIA and visual inspection with Lugol’s iodine (VILI). Women in the studies were between 25 and 59 years of age, with at least 73 percent younger than age 45.

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  • Most of the epidemiological studies which compared breast cancer risk of active smokers to women who were not smokers (regardless of their passive smoke exposure) have found no association of smoking and breast cancer risk. But several studies found that women who smoked had a decreased breast cancer risk. It is not uncommon for epidemiological studies to come to different assessments of health risk, especially when, as in these studies, the associated risk is not large.

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  • Cytochrome P450BM3is a self-sufficient fatty acid mono-oxygenase consisting of a diflavin (FAD/FMN) reductase domain and a heme domain fused together in a single polypeptide chain. The multidomain structure makes it an ideal model system for studying the mechanism of electron transfer and for understanding P450 systems in general. Here we report the redox properties of the cyto-chrome P450BM3 wild-type holoenzyme, and its isolated FADreductase andP450 heme domains, when immobilized in a didodecyldimethylammonium bromide film cast on an edge-plane graphite electrode....

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  • Antisense oligodeoxynucleotides (AS-ODNs) are frequently used for the down-regulation of protein expression.Because the majority of potential antisense sequences lacks effect-iveness, fast screening methods for the selection of effective AS-ODNs are needed.We describe a new cellular screening assay for the evaluationof the potency and specificityof new antisense sequences.

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  • Solvent casting property for the scaffolds preparation is very simple, easy and inexpensive. It does not require any large equipment; it is totally based upon the evaporation of some solvent in order to form scaffolds by one of the two routes. One method is to dip the mold into polymeric solution and allow sufficient time to draw off the solution; as a result a layer of polymeric membrane is created. Other method is to add the polymeric solution into a mold and provide the sufficient time to evaporate the solvent that create a layer of polymeric membrane, which adhere to...

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  • In morocco access to antenatal services is limited and many HIV- positive pregnant women are not identified for lack of HIV testing, especially in rural areas. The fear of stigma and discrimination is a major barrier for women to get tested, both at home and in health care settings. Breast-feeding is contraindicated by the Ministry of Health (an outdated recommendation), but formula is provided in only three cities and only 56 percent of the rural population has access to safe drinking water.

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  • After researching literature on addiction and film, I chose the films for the study and viewed each one many times, specifically looking for socioeconomic representations of characters, treatment of different races, sexes, and sexual preferences, methods of production as they relate to addicted characters and drug usage, and the depiction of treatment/ self-help groups. I then outlined the narrative of each film and compared the uses and meanings brought to addicts, addiction, and substances. I found that these movies construct a fairly unified image of treatment.

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  • Process costing is used in situations where homogeneous products or services are produced on a continuous basis. Costs flow through the manufacturing accounts in basically the same way in a process costing system as in a job-order costing system. However, costs are accumulated by department rather than by job in process costing. In process costing, the equivalent units of production must be determined for each cost cat- egory in each department.

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  • In the traditional region of Northern Nigeria, Pathfinder has struggled to promote the use of modern contraceptive methods to delay and space pregnancies. Traditional communities in this area generally see children as a gift from God and, assured that He will provide for their families, resist limiting their family size or spacing women’s pregnancies. Sexuality is not openly discussed, so reaching families with RH/FP information and services has been difficult.

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  • Ovarian cancer is the most common fatal cancer of the female reproductive tract in industrialized countries. At the time of writing, it is the fourth most common cause of cancer death in women in the U.K., after breast, lung, and colorectal cancer, with a lifetime risk of approximately 2% (1). It tends to present at an advanced stage, with limited prospects for treatment and generally poor survival.

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  • The data items to be collected by a registry are dictated by the purpose for which the registry has been established, by the method of data collection used and by the resources available to the registry. However, the emphasis should be on the quality of the data collected rather than on the quantity. It is advisable that registries in developing countries should start by attempting to collect only information on the basic items listed in . A unique registration number (cancer registry number) is assigned by the registry to each patient.

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  • The abnormal lump or spot may be found using mammography or other testing methods. A procedure called a biopsy removes a piece of tissue from the lump or spot to find out if cancer cells are present. The pathology report will tell you what kinds of cells are present. is the breast cancer invasive? If breast cancer is found, it’s important to know whether the cancer has spread outside the milk ducts or lobules of the breast where it started. Non-invasive cancers stay within the milk ducts or milk lobules in the breast. They do not grow into or invade normal...

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  • Many recent studies have reported that microRNA (miRNA) biogenesis and function are related to the molecular mechanisms of various clinical diseases. Several methods, including northern blotting and DNA chip anal-yses, are capable of assessing miRNA-production patterns in cells. How-ever, the development of repetitive monitoring of the miRNA-production profile in a noninvasive manner is demanded for the application of miRNAs to human medicine.

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