The impact of molecular biology on assessment of water quality: advantages and limitations of current techniques

The advent of molecular biology has had a dramatic impact on all aspects of biology, not least applied microbial ecology. Microbiological testing of water has traditionally depended largely on culture techniques. Growing understanding that only a small proportion of microbial species are culturable, and that many microorganisms may attain a viable but non-culturable state, has promoted the development of novel approaches to monitoring pathogens in the environment. This has been paralleled by an increased awareness of the surprising genetic diversity of natural microbial populations. By targeting gene sequences that are specific for particular microorganisms, for example genes that encode diagnostic enzymes, or species-specific domains of conserved genes such as 16S ribosomal RNA coding sequences (rrn genes), the problems of culture can be avoided. Technical developments, notably in the area of in vitro amplification of DNA using the polymerase chain reaction (PCR), now permit routine detection and identification of specific microorganisms, even when present in very low numbers. Although the techniques of molecular biology have provided some very powerful tools for environmental microbiology, it should not be forgotten that these have their own drawbacks and biases in sampling. For example, molecular techniques are dependent on efficient lysis and recovery of nucleic acids from both vegetative forms and spores of microbial species that may differ radically when growing in the laboratory compared with the natural environment. Furthermore, PCR amplification can introduce its own bias depending on the nature of the oligonucleotide primers utilised. However, despite these potential caveats, it seems likely that a molecular biological approach, particularly with its potential for automation, will provide the mainstay of diagnostic technology for the foreseeable future

Developing researchers in the arts and humanities: lessons from a pilot programme to develop discipline-specific research skills

Although increasing emphasis is placed on the provision of research training for doctoral students, much of the support currently available is generic in nature, rather than tailored to the student’s particular field(s) of study. In this paper, I briefly review UK graduate education for arts and humanities research students, and some of the ways in which the distinctive demands of their discipline(s) shape the research student experience and hence their development needs. I describe the design and delivery of a pilot programme of discipline-specific research skills development, co-ordinated by the Subject Centre for Philosophical and Religious Studies, which aims to address such needs; and I evaluate its success. I conclude with some recommendations for future practice; in particular, I argue that doctoral training provision is more effective when it involves a subject-specific approach in which practising academics from the discipline(s) play a significant role – both in terms of fostering an improved level of student engagement with the programme, and of delivering training and development opportunities which are tailored to the student’s particular context and needs

The Inhabited Wall olive oil factory in Palestine

Olive Oil and Bottle Wash Factory; Market and Base for International Volunteers in Qalqilia, The Palestinian Territories The construction of the separation wall in the Palestinian territories has impacted enormously on the day-to-day lives of Palestinians in Qalqilia. Once described as ‘The West Bank’s Fruit Basket,’ serving Israel and the West Bank as an affluent market town, the people of Qulqilia are now cut off from their land, schools, universities, places of work, medical care, friends and family The negative chain reaction that has resulted from the construction of the wall can be seen in the sharp rise in unemployment, shop closures, shrinking market size, and reduced fruit and vegetable prices My initial exploration work included tracing the companies involved in constructing the barriers, and documenting the structures and defence mechanisms. As a result and conclusion to my initial research, a number deceives were designed which represent my research of the structures and the attributes I attached to the disruptions The construction process of my proposed building begins with tapping into an existing artesian well in Qalqilia. Natural resources will be used wherever possible as a reaction to the unpredictability of power supply in the West Bank Two concrete walls are constructed on the site in front of the existing separation wall. The walls act as a divide between the process of selling goods, making olive oil and washing bottles, and the waste created by the factories and the delivery of goods, olives and used bottles The accommodation, laundry, and communal block are temporary. The structures can be moved to other destinations in the West Bank or other countries where an international presence could benefit areas of conflict The concrete wall uses Palestinian earth and crushed rubble from demolished houses for the aggregate. The factories and market are permanent buildings and act as a legacy, eventually serving the surrounding Israeli towns and West Bank as a market when the international volunteers are relocated, in the event of an end to the occupatio

The Liverpool Care Pathway

For many practising doctors, especially in general practice or in general internal medicine, decisions at the end of life are often some of the most difficult. Not only is decision making difficult, but implementation may create a further set of problems. Most of us are orientated to doing something – usually something that is active, promoting life or health. Many end of life decisions demand something different: the acceptance that life is coming to an end and that the quality of the final phase of the patient’s illness is to offer a good death. The doctor must reorientate his or her thinking to a different, less distinct target. Reference to the the development of the Liverpool Care Pathway for the dying patient (LCP).peer-reviewe

What is Probability?

Probabilities may be subjective or objective; we are concerned with both kinds of probability, and the relationship between them. The fundamental theory of objective probability is quantum mechanics: it is argued that neither Bohr's Copenhagen interpretation, nor the pilot-wave theory, nor stochastic state-reduction theories, give a satisfactory answer to the question of what objective probabilities are in quantum mechanics, or why they should satisfy the Born rule; nor do they give any reason why subjective probabilities should track objective ones. But it is shown that if probability only arises with decoherence, then they must be given by the Born rule. That further, on the Everett interpretation, we have a clear statement of what probabilities are, in terms of purely categorical physical properties; and finally, along lines laid out by Deutsch and Wallace, that there is a clear basis in the axioms of decision theory as to why subjective probabilities should track these objective ones. These results hinge critically on the absence of hidden-variables or any other mechanism (such as state-reduction) from the physical interpretation of the theory. The account of probability has traditionally been considered the principal weakness of the Everett interpretation; on the contrary it emerges as one of its principal strengths

'Tis better to be seen.

The article presents the author's experience related to leisure activities. He says as, "The sound of my Adidas sprigs scratching and clawing at the concrete as I sprint down Wendywood Lane towards the school draws attention and interested looks, not to mention amusement, from the early morning gardeners and people shuffling out to collect the paper. With lungs nearly bursting and my breath heaving painfully in my chest, the picket fences and hydrangeas blur beside me as I eventually round the corner to the back of the school fields. I scan the horizon for my school colors. I can just make out the yellow and blue strip of my hockey team as they gather together by the dug outs. Parents are starting to gather on the sideline and joust for the position closest to the coach. I search along the line for a glimpse of my father. Not there yet. I know that he'll be there soon.