Biological
List biological
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Effective and beneficial bacteria in the filter are important for maintaining a healthy biological balance and good water qualityit contains a mix of highly active filter bacteria, which break down harmful substances, and sludge-reducing cleaning bacteria
15 €
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Many women expect to become mothers but are childless through social rather than biological reasons - perhaps they haven't met the right person or they prioritised career or education earlier in lifeeach story highlights the different aspects of being childless by circumstance, as women move through their 30s, 40s, and 50s, and beyond their ages of fertilityfeaturing international interviews by grief counsellor and researcher lois tonkin, this collection of first-person stories provides insight into the under-discussed situation of being childless by circumstancethe book explores feelings of grief and loss, and also how women adapt positively to their changed life expectations, finding excitement in the alternative, rich and complex shapes their lives have taken
13 €
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Written for researchers, industry personnel, and students interested in nonthermal food technology, this reference will lay the groundwork of plasma physics, chemistry, and technology, and their biological applications
79 €
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This book makes an important contribution to current philosophical debate on the nature and origins of agency
103 €
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For the serious koi carp keeper, the answer is a particle filter device for use on the outlet(4") pipe of a settlement chamber, prior to biological filtrationthis particular example is i believe one of the first batch produced so has the all stainless steel rotor arm, it was probably from around although it was only in use for about 18mths and has been stored ever sincethere is some perishing evident so the pump will for instance need rewiringno vat, but price does not include any form of p&p/delivery charge
100 €
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Bonnet includes many accounts of his observations on natural history and relates his biological theoriesillustrations: none condition: strong bindingshis experimental research and his philosophy had a profound influence on 18th and 19th century naturaliststhe first edition consisted of two volumes onlyfairly fresh interior with some inconsequential foxingcatawiki’s goal is to make special objects universally availableare you interested in this item? this item is up for auction at catawikispine adorned with raised bands, title and volume number labels and gilded florets in compartmentssize: octavo (12 x 20 cm)good overall condition3 octavo volumespagination: 364ppcomplete 3/3 volumesstrong bindingscomplete with 3 volumes in period full calf leather bindingsmost complete editionnew edition (second edition), corrected and considerably expanded (with 12 new chapters and many important notes)virchaux et compagnie, (new edition, corrected and considerably expanded)charles bonnet: contemplation de la naturehambourg, chez jplease click on "respond to advert" (orange button) to get redirected to the catawiki websitelight rubbing and tears to the headcapsour weekly auctions feature thousands of unusual, rare, and exceptional objects you won’t find in just any storebinding: period full marbled calfskin binding
98 €
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Ubbink aqua start is a liquid pond water care product ensuring a good biological balance where your fish and plants can thrive! stabilises the ph level of the water at a value of between 6ubbink pond water ph stabiliser aqua start 500ml
21 €
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Sera pond toxivec properties: immediately removes ammonia and nitrite, toxic to fish binds harmful heavy metals such as lead and copper removes chlorine and chloramines reduces high nitrate levels and thus algae growth protects the mucous membranes of the fish promotes and accelerates the establishment of the biological balancesera pond toxivec sera pond toxivec is the effective, safe pollutant remover with immediate effectemergency aid for all pondsif sudden and massive stress peaks with toxic substances occur due to destabilizing factors, you have to react quickly
27 €
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5" bone front pony 8" bone back note: cleaning and washing after use, hose down or wipe exterior and brush lining, or machine warm wash 30’c spin dry avoid biological powdersone complete set of clarendon pony front and hind competition boots in very good conditionthese ensure the boot straps will not undo thus making it unnecessary to over tapethe elastic is made exclusively for clarendonthe hind boot has a speedy cut top to protect the lateral digital extensor tendon and an additional area of protection at the front of the leg of 6mm high impact resistant foam to protect the front of the hind legs when going over jumpsready to use the rrp of these boots is £132 so grab a bargain designed to give maximum all-round protection and even supportimportant keep velcro straps clean of fluff and stable debrisgenerally used: pre-novice, novice and intermediate, cross country eventing hunting, team chasing, marathon driving, or where you want your horse to have the bestthe boots are made differently for front and hind legs as the areas of protection and flections differsandwiched between the inner and outer layers is up to 12mm of high impact resistant foamfastened with clarendon’s unique system of three elastic and velcro straps, which are securely held in place by three stainless steel hooks on elasticit’s elasticity and strength is very important, and should never be substitutedconstructed with a tough synthetic leatherette outer, for durability and ease of cleaning, the boot is lined with high quality fur to ensure a perfect comfortable fit, that allows air circulationthe front boot gives an additional area of protection at the back of the fetlock and has a second layer of 6mm high impact resistant foam in the tendon area to help against the hind hoof over-reachingdo not tumble dry
49 €
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Use of this material under your liner will help protect the inner wall from stone punctures and cushion the pond walls for fish, while allowing gases to escape which helps to maintain the proper biological balance for all pond lifeenvironmentally friendlydewitt pond underliner is constructed of a non-woven needle punched 6 ozmeasures 12 foot x 25 footdimensions: 300dewitt pond underliner 12x25installs in minutesproduct features: easy to usedewitt pond underliner is a durable, clean, and safe material to install under ponds instead of using cardboard, newspapers, sand, or old carpet paddingmaterial: polypropylene
40 €
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There's also the chance to find out what's been happening with other blossom street regulars including lydia and her husband, brad, who want to adopt; anne marie; and ellen,whose biological father has tracked her downwith romance and friendship on the horizon, lydia's "knit to quit" class is going to have a busy summer!make time for friendssee oxfam website for delivery information read moreit has four members: abbie, a woman who is dealing with a broken engagement; alix, who wants to quit smoking before she gets pregnant; margaret; and - for the first time - a man, brian hutchinson, who joins the class to help deal with stressoxfam bookshop cheltenham lydia's newest knitting class is called "knit to quit"make time for debbie macomber
2 €
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As humanity adopts biological enhancements in attempts to achieve perfection, a terrorist organisation up-rises to prevent what could be the eventual extinction of the human racetwo former lapd swat members join olympus special mech-piloting, anti-terrorism force to take down the leader of the subversive organisationspecial features include: episode commentaries, english trailer, textless songs, the inside episodes 1-13 (japanese 2see oxfam website for delivery information read moreoxfam emporium manchester at the edge of extinction, humanity needs a hero0 with english subtitles) item is pre-ownedin the wake of destruction from a global conflict, the city of olympus stands as a beacon of hope in a world of chaos
19 €
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These benefits include a unique water vortex filtering process, mechanical filtration to remove small particles, biorock for biological filtering and a uv bulb to remove evidence of green water5 cm unit height 52the filter comes equipped with a cleaning indicator that takes the guess work out of maintenance intervals5cm canister height 40cm canister volume 31l uv bulb 18w power cord 48m foam pieces 4 read morenew, never used, still in original boxlaguna pressure flo high performance pressurised pond filter with uvc steriliser plus laguna max-flo waterfall and filter pump5" flexible hose, two superfish spiral hose clamps -packs and a superfish pond cover netit then passes through the mechanical filtration stage, consisting of highly durable foam filters that intercept and trap dirt and debrispaid £464 asking £350 the laguna pressure-flo has a wide range of benefits resulting in a top quality product that helps pondkeepers enjoy the hobbypressure-flo is designed to work in tandem with a solids handling pump, ideally a laguna max-flo with the filter connected to the pump, water enters the unit through a water inletincludes 5m of 38mm/1laguna have developed a user friendly back wash system that reverses the vortex and uses two internal blades that clean the sponges, this waste water can then be used as a natural fertilised water packed with nutrients that will help your surrounding garden growflow rate lph unit diameter 36with this highly effective unique vortex filtering method pushes water down and through the filter sponge trapping all the small particles, this vortex process does however allow for a buildup of particles on the outside of the sponges
350 €
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After escaping a firing squad, he uncovers a plot to hold the world to ransom with the threat of biological warfaresee oxfam website for delivery information read moreoxfam bookshop wanstead barry humphries plays sir leslie patterson, the australian cultural ambassador, who is sent to an oil rich gulf state to make peace after a united nation blundermeanwhile dame edna everage is on a 'peace for possum's mission' and she becomes embroiled in the whole affairit's up to the two unlikely heroes to save the world
9 €
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Data show that approximately 40 percent of undergraduate students leave engineering programs, 50 percent leave the physical and biological sciences, and 60 percent leave mathematicsthis book grew out of a three-year, seven-campus study aimed at explaining the national loss of 40 to 60 percent of undergraduates from science, mathematics, and engineering majors into nonscience disciplinesgood overall conditionthis intriguing book explores the reasons that lead undergraduates of above-average ability to switch from science, mathematics, and engineering majors into nonscience majorsoxfam bookshop glossop road slight shelf wear to cover, ex-academic library stamps and stickers, slightly warped spineconcern about this waste of talent is heightened because these losses occur among the most highly qualified college entrants and are disproportionately greater among women and students of color, despite a serious national effort to improve their recruitment and retentionthe authors' findings, culled from over 600 hours of ethnographic interviews and focus group discussions with undergraduates, explain the intended and unintended consequences of some traditional teaching practices and attitudessee oxfam website for delivery information read moreworking from extensive interviews with undergraduates, the authors are able to offer explanations for the loss of able students, including students of color and womenbased on a three-year, seven-campus study, the volume takes up the ongoing national debate about the quality of undergraduate education in these fields, offering explanations for net losses of students to non-science majorsthis is a landmark study-an essential source book for all those concerned with changing the ways that we teach science, mathematics, and engineering education, and with opening these fields to a more diverse student bodytalking about leaving is richly illustrated with students' accounts of their own experiences in the sciencesa landmark study, the volume is an essential source book for all those concerned with changing the ways that we teach science, mathematics, and engineering education, and with opening these fields to a more diverse student body
20 €
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We flatter ourselves about the nature of free will and yet the most enormous forces - biological, physical, metaphysical - constrain our every actionthis is a stimulating and enraging meditation on everything from cybernetics to the fairground marionettes of the titlesee oxfam website for delivery information read morevery good conditiontimes literary supplement books of the year in the soul of the marionette, john gray draws together the religious, philosophic and fantastical traditions that question the very idea of human freedommany writers and intellectuals have always understood this, but instead of embracing our condition we battle against it, with everyone from world conquerors to modern scientists dreaming of a 'human dominion' almost comically at odds with our true stateoxfam bookshop raeburn place signed with signature to title pagedustjacket price unclipped
(England)
29 €
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Some parts of the biological world must have been designedat last, michael behe has updated the book with a major new afterword on the state of the debatetoday the movement is stronger than ever, and the book is a classic and an international bestselleryet step-by-step genetic mutations would never produce all of those parts together at oncefrom one end of the spectrum to the other, darwin's black box has established itself as the key text in the intelligent design movement, the one argument that must be addressed in order to determine whether darwinian evolution is sufficient to explain life as we know it, or notprominent among them was michael behe, a microbiologist working in a field that darwin could not even have imagined existingthe intelligent design movement was born when a handful of scientists realized that nature exhibits characteristics that could not have evolved by random mutationthey cannot function without all of their partsoxfam bookshop cheltenham ten years ago, darwin's black box launched the intelligent design movement: the argument that nature exhibits evidence of design, beyond darwinian randomnesssee oxfam website for delivery information read moremicrobiology has discovered staggering complexity at the cellular level of life and during his research behe made a stunning discovery: some parts of life are irreducibly complex
3 €
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It explores areas of darkness and forgetting in scientific research, and the use of inappropriate mechanistic metaphors in the understanding of biological systemsit also considers the neglect of useful research that does not fit the current intellectual fashion in scienceit highlights the misleading images that have distorted people's view of the history of liferichard lewontin rejects the attempt to reduce the complexity of living things to the simplicity of physicsthe history of science, daniel kevles recounts the the strange story of resistance to the idea that viruses can cause cancersee oxfam website for delivery information read morestephen jay gould gives a summary of his critique of conventional "progressive" pictures of evolutionary change, using trees, ladders and conesjonathan miller, with typical wit and insight, shows how the discredited panacea of hypnotism could have helped to reveal a non-freudian view of the unconscious - an unconscious that is not simply the dark underside of the mind, but a powerfully enabling form of knowledgeoliver sacks offers tour of scientific roads not taken, or taken too lateoxfam bookshop cheltenham this volume examines the ways in which science is influenced by culture
3 €
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Dimensions glass bell-jar = h33 cm / l26 cm / w15 cm * all insects and butterflies are non-cites species, as this artwork is extremely vulnerable, it will always be sent in double-sided corrugated boxes, packed in the double box system and filled with biological filling materiala beautiful bell-jar with butterfly artwork "papilio dream" filled with 9 real prepared papilio butterflies of a qualityplease click on "respond to advert" (orange button) to get redirected to the catawiki websitea born craftsman with a passion for ancient crafts and mother naturethe artwork features the designer label and certificate with title noa40 and serial number: (see photos) robert marscatawiki’s goal is to make special objects universally available6x papilio zenobia and 3x papilio demodocuswith his special love for the stunning beauty of butterflies and inspired by artists such as van gogh & damian hirst, robert has been designing his own collection of butterfly artworks sinceour weekly auctions feature thousands of unusual, rare, and exceptional objects you won’t find in just any storethis artwork comes from the collection: ‘butterfly artwork’, designed and manufactured by robert mars (the netherlands)are you interested in this item? this item is up for auction at catawiki
189 €
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biological inhibitor of green water algae16 oz (treats gallons)the bacteria help establish and maintain a clean pond, free of algaethey also help improve dissolved oxygen levels and reduce noxious odors from the pond
25 €
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Supports and accelerates the formation of a biological equilibriumprevents high nitrate levels and, correspondingly, algae growthremoves chlorine and chloraminesquick reaction is required if sudden and massive pollution peaks by toxic substances occur due to de-stabilizing factors
71 €
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Wetland systems deals comprehensively with not only the design, operation, maintenance and water quality monitoring of traditional and novel wetland systems, but also covers: analysis of asset performance modelling of treatment processes performances of existing infrastructure sustainability and economic issues solutions to pressing water quality problems associated with constructed treatment wetlands, integrated constructed wetlands, farm constructed wetlands and storm water ponds, and other sustainable biological filtration and treatment technologies linked to public health engineering are explainedit provides a descriptive overview of complex black box' treatment systems and the general design issues involvedoxfam shop chippenham wetland systems covers broad water and environmental engineering aspects relevant for the drainage and treatment of storm water and wastewaterwetland systems is a useful reference for the design and operation of wetland systems by engineers and scientists working for the water industry, non-governmental organisations, local authorities and governmental bodiesstandard and novel design recommendations for predominantly constructed wetlands and related sustainable drainage systems are given to take into account the interests of professional engineers and environmental scientiststhe research projects discussed are multi-disciplinary, holistic, experimental and modelling-orientatedit is also a valuable text for undergraduate and postgraduate students, lecturers and researchers in civil and environmental engineering fieldssee oxfam website for delivery information read morecase study topics are diverse: natural wetlands and constructed treatment wetlands; sustainable water management; and specific applications, such as wetlands treating hydrocarbons
39 €
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Used,large heavy piece of aquaroche for all types of aquariums,substitute to live rock, hoast to live bacteria for biological filteration,56cm high,46cm wide,& 30cm deep, read more
100 €
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A group of prominent academics from a wide range of disciplines focus on three questions famously raised by turing: what, if any, are the limits on machine 'thinking'? could a machine be genuinely intelligent? might we ourselves be biological machines, whose thought consists essentially in nothing more than the interaction of neurons according to strictly determined rules? the discussion of these fascinating issues is accessible to non-specialists and stimulating for all readerspublished  see oxfam website for delivery information read moreoxfam shop fulwood road this is the first of two volumes of essays 'the legacy of alan turing', whose pioneering work in the theory of artificial intelligence and computer science continues to be widely discussed today
24 €
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These benefits include a unique water vortex filtering process, mechanical filtration to remove small particles, biorock for biological filtering and a uv bulb to remove evidence of green water5 cm unit height 52the filter comes equipped with a cleaning indicator that takes the guess work out of maintenance intervals5cm canister height 40cm canister volume 31l uv bulb 18w power cord 48m foam pieces 4 read morenew, never used, still in original boxlaguna pressure flo high performance pressurised pond filter with uvc steriliser plus laguna max-flo waterfall and filter pump5" flexible hose, two superfish spiral hose clamps -packs and a superfish pond cover netit then passes through the mechanical filtration stage, consisting of highly durable foam filters that intercept and trap dirt and debrispaid £464 asking £300 the laguna pressure-flo has a wide range of benefits resulting in a top quality product that helps pondkeepers enjoy the hobbypressure-flo is designed to work in tandem with a solids handling pump, ideally a laguna max-flo with the filter connected to the pump, water enters the unit through a water inletincludes 5m of 38mm/1laguna have developed a user friendly back wash system that reverses the vortex and uses two internal blades that clean the sponges, this waste water can then be used as a natural fertilised water packed with nutrients that will help your surrounding garden growflow rate lph unit diameter 36with this highly effective unique vortex filtering method pushes water down and through the filter sponge trapping all the small particles, this vortex process does however allow for a buildup of particles on the outside of the sponges
300 €
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Sludge is a build up of biological waste from fish, plants and other pond debrisit can result in very poor water conditions which affect the various life forms within the pondthis pond cleaner can treat up to gallons/ litres of pond water by simply placing the individual nuggets into the bio filter or pond water
22 €
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10mm headphone drivers biological diaphragm hifi headset speakers diy unit minil built-in two arcade joystick functionspropeller holder stabilizer fixing mount for dji mavic air 2 drone accessories
23 €
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See oxfam website for delivery information read moreoxfam bookshop clifton very good condition, some shelf wear
(England)
14 €
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A philosophy which takes its name from ecological and biological concepts, it puts forward ideals developed from traditional japanese philosophy and culture, while continually acknowledging the presence of the multivalent, contemporary worldit is a philosophy of "both-and" rather than "either-or", a practice of mix-and-match rather than creation from scratch, an ethic of inclusion rather than exclusionkurokawa feels that we will recognize each other's differing personalities while competing and will co-operate while we oppose and criticize each otheroxfam bookshop bloomsbury street symbiosis, as defined by kisho kurokawa, one of japan's leading architects, is a new way of interpreting today's culturesee oxfam website for delivery information read moreas such, it is thought to be one of the most essential statements of post-modern culture to date
80 €
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But does this make biological sense? should we expect altruism to evolve throughout the cosmos, or is this only wishful thinking? is it dangerous to send messages to other worlds, as stephen hawking has suggested, or might humankind benefit from an exchange with intelligence elsewhere in the galaxy? would extraterrestrial societies be based on different ethical principles, or would we see commonalities with earthly notions of morality? extraterrestrial altruism explores these and related questions about the motivations of civilizations beyond earth, providing new insights that are critical for setithe book is carefully edited by douglas vakoch, director of interstellar message composition at the seti institute and professor of clinical psychology at the california institute of integral studiesoxfam bookshop bloomsbury street extraterrestrial altruism examines a basic assumption of the search for extraterrestrial intelligence (seti): that extraterrestrials will be transmitting messages to us for our benefitthis question of whether extraterrestrials will be altruistic has become increasingly important in recent years as seti scientists have begun contemplating transmissions from earth to make contacttechnological civilizations that transmit signals for the benefit of others, but with no immediate gain for themselves, certainly seem to be altruisticthis interdisciplinary book will benefit everybody trying to understand whether evolution and ethics are unique to earth, or whether they are built into the fabric of the universethe foreword is by frank drakesee oxfam website for delivery information read morevery good condition with only some minor creasing to the corners of the coverchapters are authored by leading scholars from diverse disciplines-anthropology, astronomy, biology, chemistry, computer science, cosmology, engineering, history of science, law, philosophy, psychology, public policy, and sociology
45 €