Accelerated CD8+ T-cell memory prime-boost answer dendritic-cell vaccination
Accelerated ageing rice fallow black gram cultivars
Accelerated ageing test aubergine, cucumber melon seeds relationship time temperature variables
Accelerated aging controlled deterioration peanut seeds
Accelerated aging effect Anadenanthera colubrina (Vellozo) Brenan: Mimosaceae seed vigour
Accelerated aging coriander seeds
Accelerated aging cucumber seeds submitted saturated salt solution
Accelerated aging pepper (Capsicum frutescens L.) seeds
Accelerated aging test anise seeds
Accelerated aging test - principles procedures
Accelerated aging tests seeds 11 flax (Linum usitatissimum) varieties
Accelerated aging time estimation birdsfoot trefoil seed
Accelerated bioremediation chlorinated solvents fractured rock aquifer
Accelerated decline fertility India 1980s - trends Hindus Muslims
Accelerated decline ornamental trees - occurrence marine spray
Accelerated estimation cherry resistance coccomycosis moniliosis
Accelerated flow non-Newtonian fluid porous media
Accelerated kiln drying wawa (Triplochiton scleroxylon) sawn timber
Accelerated methods progress acidity-tolerant varieties meadow clover
Accelerated microbial decomposition 3,4-dichloroaniline soil presence activated carbon
Accelerated micropropagation banana species (Musa ssp.: Cavendish)
Accelerated natural attenuation MTBE Oxygen Release Compound (ORCReg.)
Accelerated neutrophil apoptosis neutropenic patients hepatosplenic schistosomiasis stimulated serum Fas ligand
Accelerated regeneration alveolar bone cure periodontal pockets doxycycline-containing polymer (DoxyrobeReg.)
Accelerated ripening Mozzarella cheese increasing ripening temperature
Accelerated screening hazelnut seedlings resistance toern filbert blight
Accelerated shelf-life tests
Accelerated solvent extraction
Accelerated transformation deactivation erythromycin superheated water. Temperature effects, transformation rates, impacts dissolved organic matter
Accelerated transformation deactivation erythromycin superheated water. Transformation reactions bioassays
Accelerated vaccination schedules provide protection hepatitis A B last-minute travelers
Accelerating influence TNF- alpha Rhus verniciflua-induced growth inhibition apoptosis human osteosarcoma cells
Accelerating effects quercetin TNF- alpha -induced apoptosis MC3T3-E1 osteoblastic cells
Accelerating embryonic growth incubation extended egg storage Embryonic livability
Accelerating embryonic growth incubation extended egg storage Embryonic growth metabolism
Accelerating germination tomato seeds
Accelerating commercialization home-grown genetically engineered crops
Acceleration Domiati cheese ripening lipase enzyme
Acceleration flowering night break heating cure harvesting April May Lilium formolongi cv. Hayachine
Acceleration flowering overexpression MFT (MOTHER OF FT AND TFL1)
Acceleration generative clonal selection grape vitro methods
Acceleration thermoxidation oil heme iron
Acceleration wound healing gelatin film dressings epidermal growth factor
Acceptability accessibility shigellosis vaccine Nha Trang City Viet Nam
Acceptability growth lambs fed diverse forms levels tagasaste (Chamaecytisus palmensis)
Acceptability absorption package prevent mother-to-child transmission fast HIV testing Abidjan, Cote dIvoire
Acceptability clean home delivery kits Nepal. qualitative study
Acceptability utilisation services voluntary councelling testing sexually transmitted infections Kahsey Abera Hospital, Humera, Tigray, Ethiopia
Acceptability utilisation voluntary HIV testing nevirapine reduce mother-to-child transmission HIV-1 integrated routine medical care
Acceptability HIV/AIDS counseling testing premarital couples China
Acceptability microbicide women partners 4-country phase I experiment
Acceptability community-based growth monitoring rural village in Africa
Acceptability female-controlled HIV/STI prevention options Nigerian professionals: exploratory study
Acceptability flaxseed/linseed (Linum usitatissimum) incorporated traditional foods
Acceptability irradiated food restaurant managers
Acceptability mesquite flavoring substance native Americans Arizona
Acceptability microbiological inhibitor tests detection inhibitory substances powdered milk-based dietary foods
Acceptability smoke prescribed forest burning theern Inland. focus group advance
Acceptability sweetened calorie dairy desserts - affective tests internal preference mapping
Acceptability oral formulation lineal particulate ( beta 1-3 gpl) effect answer Newcastle vaccine
Acceptability tomato fruits stored ambient temperature
Acceptability traditional healers observed cure providers tuberculosis control tribal region Andhra Pradesh, India
Acceptance preference fruits oviposition Ceratitis capitata (Diptera, Tephritidae) populations
Acceptance rejection vasectomy rural males
Acceptance assessment cassava chips
Acceptance HIV testing pregnant women Dar-es-Salaam, Tanzania
Acceptance buckwheat grain food Tyrophagus putrescentiae (Schr.) (Acari - Acaridae)
Acceptance diverse larch timber resources high-quality flooring panels: industrial case study
Acceptance phytopharmaceuticals physicians patients primary-care clinics
Acceptance postharvest technologies cooking banana ineast Nigeria
Acceptance scientifically validated indigenous cure digestive disorders livestock
Acceptance soy yogurt adolescents
Acceptance voluntary whalewatching codes conduct in Scotland - effectiveness governmental industry-led guidelines
Acceptance wind turbines recreational landscape: background results empirical investigation Eifel area
Acceptance wood-HDPE composites manufactured compression mold outdoor functions (I) - Acceptance facility
Accepting uncertainty, assessing risk - decision quality managing wildfire, forest resource values, technology
Access agreements context fiscal reforms: Mozambican context
Access agreements: Pacific Forum Fisheries Agency
Access adhering tuberculosis cure - barriers faced patients communities Burkina Faso
Access discrimination intercollegiate athletics
Access kind
Access abandoned children orphans HIV/AIDS antiretroviral therapy legal impasse
Access rules ligneous resource local population inern Cameroon
Access control resources
Access coverage renal replacement therapy minorities ethnic groups Venezuela
Access antiretroviral therapy HIV/AIDS patients Khon Kaen Province, Thailand
Access information HIV important maximizing acceptance antenatal HIV antibody test
Access continued professional education health workers Blantyre, Malawi
Access genetic resources, protection traditional knowledge, intellectual property rights - learnings learned Costa Rican experience
Access health care in Africa: effect race class
Access historic environments tourists disabilities. compromise?
Access information adoption hybrid corn - proof China's poor areas
Access justice matters protection animals qualified entities
Access land human right?
Access land water - important elements nutrition human right?
Access land water - key elements human food?
Access land rental markets. (counter-) evolution World Bank's land policy?
Access land. human right?
Access pasture: concepts, constraints, practice Kashmir Himalayas
Access rural land land administration violent conflicts
Access rural land inern Ethiopia - mismatch policy reality
Access rural non-farm economic activities - results field study Sri Lanka
Access, disability, tourism - changing responses United Kingdom
Access, sterling image hamper NI hotels
Accessibility attitudinal barriers encountered travelers physical disabilities
Accessibility insecticide treated bed nets intermittent presumptive cure malaria Mozambicans obtaining healthcare inern Malawi. case study international disease control equity health
Accessibility tourism web sites European Union
Accessibility healthcare services cervical cytology performed urban region Colombia
Accessibility, unfinished conquest
Accessing areas
Accessing understanding consumer awareness potential requirement edamame
Accessing limnological change inconsistency fossil diatom assemblages,-East Australia
Accessing microbial diversity bioremediation environmental restoration
Accession manipulation - combining splitting accessions tool improving germplasm manipulation efficiency
Accessory caudal glenoid ossification centre potential lameness dogs
Accessory characteristics description pumping discharge lines
Accessory liver lobe anomaly abdominal area calf
Accessory sperm. biomonitor boar sperm fertilization capacity
Accident bladder rupture dog
Accident risk private farmers similar farm machinery
Accidental drainage cerebral hydatid cyst peritoneal cavity
Accidental poisoning 17 dogs lasalocid
Accidents attributable falling, sliding stumbling forestry
Accidents biological material undergraduate nursing students public Brazilian University
Acclimation Mozambique tilapia (Oreochromis mossambicus) salinity alters protein content larvae liver kidney
Acclimation activated sludge degrade poisonous levels 2,4-dinitrophenol
Acclimation anaerobic sludge degrading chlorophenols biodegradation kinetics acclimation period
Acclimation broiler chickens chronic high environmental temperature
Acclimation crown formation drought Quercus robur L.: intra- inter-annual variation abscission traits shed twigs
Acclimation mesophilic anaerobic sludge thermophilic conditions - PCR genera detection methodology
Acclimation nitrifiers activated sludge treatment. bench-scale assessment
Acclimation peanut (Arachis hypogaea L.) leaf photosynthesis elevated growth CO2 temperature
Acclimation photosynthesis elevated CO2 onion (Allium cepa) grown range temperatures
Acclimation photosynthetic capacity Scots pine annual cycle temperature
Acclimation plant populations shade - photosynthesis, respiration, carbon efficiency
Acclimation wax begonia light intensity - photosynthesis, respiration, chlorophyll concentration
Acclimatization Callistemon sp. microplants fog influenced shading
Acclimatization Ficus benjamina temperature irradiance conditions indoor landscapes
Acclimatization fern vitroplants vitro spore cultivation diverse substrates formed organic manures
Acclimatization vitro Gymnaster koraiensis paclobutrazol transplanting medium
Acclimatization micropropagated forest trees
Acclimatization tissue-cultured plantlets African violet Saintpaulia ionantha Wendl
Acclimatization young banana plants diverse conditions luminosity
Acclimatizing geese high temperature heat cure
Acclimatory responses stomatal conductance photosynthesis elevated CO2 temperature wheat crops grown varying levels N supply Mediterranean environment
Accommodating change bacterial indicators long term water quality datasets
Accommodating spiritual tourist - case religious retreat houses
Accommodation border survey statistics Sweden
Accompanying pre-weaned Thoroughbred (Equus caballus) foals separated mare covering reduces behavioural signs distress exhibited
Accomplishment challenges rapeseed-mustard science
Accomplishments science priorities improvement oilseeds - rape mustard
According estimates FAO, world population goats increasing
Account technical consultation Cuba - genetic resources genetic improvement tropical fruits
Account species Culicoides Latreille, 1809 (Diptera - Ceratopogonidae) regions Norte de Minas, Jequitinhonha Vale Mucuri, Minas Gerais, Brasil
Accounting bias regression coefficients fodder efficiency
Accounting cluster sampling constructing enumerative sequential sampling plans
Accounting culture paddy cultivation - broader designation livelihood
Accounting drop
Accounting fodder intake dairy cattle assessment
Accounting heteroscedasticity rating curve estimates
Accounting inherent inconsistency growth microbial risk evaluation
Accounting sparsely observed rainfall space-time inconsistency rainfall-runoff model semiarid Tunisian basin
Accounting outlay expenditure. basis differentiation technique accounting
Accounting policy agricultural organizations purposes financial reporting
Accounting results 2003
Accounting software small- medium-sized enterprises Estonian market
Accreditation EN 45004 guarantee correct, reliable objective mandatory inspection sprayers Flanders, Belgium
Accreditation veterinary schools Australia Novel Zealand
Accreditation scheme health facilities - challenges opportunities
Accredited turfgrass laboratories USGA specifications golf greens
Accretion, partitioning sequestration calcium aluminum red spruce foliage - implications tree health
Acculturation, volume status, eating habits Chinese-American preschool children primary caregivers. pilot study
Accumulated productivity Nellore cows raised in east Brazil
Accumulating ability gamma -aminobutyric acid millets buckwheat
Accumulating aerobic exercise effective volume control
Accumulating behaviour Lupinus albus L. growing normal decalcified calcic luvisol polluted Zn
Accumulation clearance anaesthetics clove oil AQUI-STM edible tissue silver perch (Bidyanus bidyanus)
Accumulation degradation oxime insecticide HNPC-A9908 Chlorella pyrenoidosa
Accumulation depuration paralytic shellfish poisoning toxins laboratory cultured purple clam Hiatula diphos Linnaeus
Accumulation distribution Na Robinia pseudoacacia saline-alkali soil
Accumulation distribution Samarium-153 rat brain intraperitoneal injection
Accumulation distribution dry matter potato
Accumulation distribution micronutrients Willamette red raspberry plants
Accumulation distribution minerals Mysore banana fruits progress
Accumulation distribution petroleum hydrocarbons mussels (Mytilus galloprovincialis) canals Venice, Italy
Accumulation exportation macronutrients watermelon Tide hybrid
Accumulation exportation macronutrients seedless watermelon
Accumulation fractionation rare earth elements (REEs) wheat - controlled phosphate precipitation, cell wall uptake solution complexation
Accumulation lactational transfer PCBs plant-protection products harbor seals (Phoca vitulina) Svalbard, Norway
Accumulation lixiviation metal macro-nutrients soils irrigated treated residual water
Accumulation properties soil organic carbon reclaimed sites Lusatian lignite miningafforested Pinus sp
Accumulation redistribution temporal reserves vegetative organs contribution grain volume high yield winter wheat
Accumulation reduction Cr in industrial effluent Bacillus sp. strain CrM-1
Accumulation release potential soil phosphorus residential areas Hangzhou city, China
Accumulation ultrastructural distribution copper Elsholtzia splendens
Accumulation kinetics organochlorinated plant-protection products triolein-containing semipermeable membrane devices
Accumulation gamma -aminobutyric acid giant-embryo rice grain relationship glutamate decarboxylase activity gene expression water soaking
Accumulation 23 kDa lipocalin brain progress injury Hyphantria cunea
Accumulation Chernobyl-derived 137Cs bottom sediments Finnish lakes
Accumulation Cu, Cd Pb sediments upper gulf Thailand
Accumulation Cu, Mn, Ni, Pb Zn red latosol fertilized sources sewage sludge cultivated maize
Accumulation DHA HepG2 cell membranes elevated supplementation fatty acids dairy fat
Accumulation Na+, Cl- leaves wild soybean seedlings lead oxidative damage salt stress
Accumulation Pb Cd influence Ca distribution corn seedlings (Zea mays L.)
Accumulation Pb, Cd, Cu Zn plants hyperaccumulator choice Lanping lead-zinc area, China
Accumulation RNA senescing root nodular cells soybean (Glycine max (L.) Merrill): histochemical proof
Accumulation Zn, Cu, Pb Cd dandelion (Taraxacum officinale Web.) environments degrees metallic contamination
Accumulation Zn, Pb, Cu Cd dandelion (Taraxacum officinale) leaves region Warsaw
Accumulation actinomycosis llama herd Switzerland
Accumulation advanced glycation products, measured skin autofluorescence, renal disease
Accumulation arsenic Lemna gibba L. (duckweed) tailing waters abandoned uranium mining sites Saxony, Germany
Accumulation arsenic Pacific oysters, Crassostrea gigas, collected aquaculture sites inern Taiwan
Accumulation astaxanthin flagellated cells Haematococcus pluvialis: cultural regulatory aspects
Accumulation biologically active furanocoumarins Ruta graveolens ssp. divaricata (Tenore) Gams vitro culture
Accumulation biologically active furanocoumarins agitated cultures Ruta graveolens L. Ruta graveolens ssp. divaricata (Tenore) Gams
Accumulation biologically active furanocoumarins vitro cultures medicinal plants
Accumulation biomass macronutrients Glycine max Richardia brasiliensis
Accumulation butyl- phenyltin compounds starfish bivalves coastal environment Korea
Accumulation butyltin compounds pantropical spotted dolphin, Stenella attenuate, coasts Taiwan
Accumulation cadmium phosphatic fertilisers soils Pakistan
Accumulation cadmium rats fed diets dietary fiber-rich bakery product
Accumulation calcium human usual iliac artery, aortic valve, xiphoid process, costal cartilage, posterior longitudinal ligament, trigeminal nerve, rib accompanied increase magnesium
Accumulation carbon, nitrogen phosphorus soil structure alder spoil heaps brown-coal mining, Sokolov (Czech Republic)
Accumulation copper zinc snap bean tissues relationship isolated soil
Accumulation copper organic vineyards behaviour
Accumulation copper tissues Chlamys farreri effects activity superoxide dismutase seawater
Accumulation dry matter nutrients tropical temperate corn varieties introduced Brazil
Accumulation dry matter, nitrogen phosphorus roots shoots varieties Cynodon Digitaria treated nitrogen cattle waste
Accumulation essential oils relationship root differentiation Angelica archangelica L
Accumulation heavy metals chemical components fish tissue
Accumulation heavy metals higher plants diverse habitat conditions
Accumulation heavy metals Typha angustifolia (L.) Potamogeton pectinatus (L.) living Sultan Marsh (Kayseri, Turkey)
Accumulation heavy metals soils cultivated land foothill areas Krasnodar area
Accumulation heavy metals vegetable plants grown Mostorod region
Accumulation heavy metals industrialisation
Accumulation intracellular activity tiamulin norfloxacin polymorphonuclear leukocytes
Accumulation jasmonic acid apple seedlings water stress
Accumulation ligands aryl hydrocarbon sex steroid receptors fish exposed treated effluent bleached sulfite/groundwood pulp paper mill
Accumulation lipochitin oligosaccharides NodD-activating compounds efficient plant-Rhizobium nodulation assay
Accumulation long chain fatty acids anaerobic sludge steady condition shock loading conditions - influence acetogenic methanogenic activity
Accumulation macronutrients grapevine rootstocks grown nutrient solution addition aluminium
Accumulation metals effects Brassica juncea (L.) Czern. (cv. Rohini) grown amendments tannery waste
Accumulation nitrate vegetables human health
Accumulation nitrate-nitrogen spinach komatsuna (Brassica spp.) sold local markets
Accumulation nitrates feed crops Far
Accumulation nitrates corn plants depending degree mineral nutrition
Accumulation nitrogen compounds similar soft berry problem table grapes
Accumulation nitrogen vegetative organs grain soft spring wheat Pro lines depending growing conditions
Accumulation non-viral 45.5K 44K polypeptides inversely correlates viral structural polypeptides midgut silkworm, Bombyx mori, infested B. mori densovirus type 2
Accumulation nonylphenol goldfish suckermouth catfish semistatic aquarium scheme
Accumulation ochratoxin A sward winter pasture situated Wielkopolska area
Accumulation organic matter nutrients surface soil young silvopastoral scheme Greece
Accumulation organochlorine plant-protection products water triolein embedded cellulose acetate membranes
Accumulation phenolic compounds aboveground part Melittis sarmatica Klock
Accumulation phenolics activity oxidative enzymes corn infested Helminthosporium species
Accumulation phosphorus nests red wood ants Formica s. str
Accumulation photosynthetic pigments proteins leaves soybean plants cultivated spoils
Accumulation physalin cells tissues Physalis minima L
Accumulation poly- beta -hydroxybutyrate Nostoc muscorum - regulation pH, light-dark cycles, N P status carbon sources
Accumulation radionuclides organs beavers Novgorod area
Accumulation salicylic acid cucumber treated glucohexaose relationship systemic acquired resistance cucumber downy mildew
Accumulation selenium natural plants selenium supplemented vegetable selenium speciation HPLC-ICPMS
Accumulation short-chain fructo-oligosaccharides excised stem root tissues asparagus cultured carbohydrate-rich medium
Accumulation heavy metals spoils soybean plants
Accumulation compatible solutes, glycine-betaine ectoine, osmotic stress adaptation heat shock cross-protection biocontrol substance Pantoea agglomerans CPA-2
Accumulation heavy metals fish living Wislany bay Szczecinski bay
Accumulation trace metals freshwater invertebrates stormwater manipulation facilities
Accumulation trinitrotoluene (TNT) aquatic organisms: Part 1: Bioconcentration distribution channel catfish (Ictalurus punctatus)
Accumulation trinitrotoluene (TNT) aquatic organisms: Part 2: Bioconcentration aquatic invertebrates potential trophic transfer channel catfish (Ictalurus punctatus)
Accumulation volatile compounds ageing red wines diverse composition
Accumulation water soluble carbohydrates perennial ryegrass varieties European sites
Accumulation pattern gliadin fractions alpha , beta , gamma , omega regulation nitrogen
Accumulation regularity protein components wheat varieties diverse HMW-GS
Accumulation regularity soluble proteins polysaccharides interaction Gastrodia elata Bl. Armillaria mellea (Vahl. Fr.) Quel
Accumulations nitrogen metabolites relationship incidences diseases pest insects crop plants
Accuracies evaluation atmospheric correction model retrieved rice reflectance spot satellite images
Accuracy reliability map-matched GPS coordinates - dependence terrain model resolution interpolation algorithm
Accuracy evaluation burned region NDVI NOAA/AVHRR GIS techniques
Accuracy evaluation remote sensing detecting tropical deforestation ineast Asia
Accuracy evaluation Bamboo Stem Fragment distinguishing technique panda population surveys
Accuracy evaluation improvement reproduction activities diverse sheep farm types measure biochemical-genetic markers
Accuracy evaluation selected methods measurement standing tree volume mountain spruce stands
Accuracy assessments hyperspectral waveband performance vegetation examination functions
Accuracy comparison predicted variance genetic merit diverse models with/out consideration relationships animal breeding
Accuracy water losses estimation distribution network: Paris case
Accuracy ag model export projections explored
Accuracy diagnostic arthroscopy evaluation cartilage damage equine metacarpophalangeal joint
Accuracy dietary energy reporting young Novel Zealand men women - relationships body composition, physical activity degree ethnicity
Accuracy diverse methods sire assessment production efficiency trait Sahiwal cattle
Accuracy estimation canine gallbladder volume determination
Accuracy forest stands delineation examination estimation methods
Accuracy guidance shuttle gantry module
Accuracy leaf rectangular region adoption growth investigations - case tomato (Lycopersicon esculentum Mill)
Accuracy marker-assisted genetic assessment major gene-polygene mixed inheritance models
Accuracy methods estimate ionized corrected serum calcium concentrations critically ill multiple trauma patients receiving specialized nutrition support
Accuracy polymerase chain response assays identification feline immunoinsufficiency virus infection cats
Accuracy pork carcass meatiness estimation based linear measurements volume elements technological Pig Testing Station dissection
Accuracy positioning cervical spine radiation therapy relation GTV, CTV PTV
Accuracy predicting milk yield alternative milk recording schemes
Accuracy remotely sensed classifications stratification forest nonforest lands
Accuracy single- multiple-trait REML assessment data including non-random missing records
Accuracy taper equations represent stem profiles Pinus elliottii
Accuracy diameter distribution prediction uneven forest transition matrix
Accuracy working width connecting fertilization crop protection
Accuracy transvaginal ultrasonography diabetic obese women postmenopausal bleeding
Accuracy ultrasonography early pregnancy identification doe
Accuracy ultrasound-guided fine-needle aspiration liver cytologic findings dogs cats - 97 cases (1990-2000)
Accuracy urine special gravity osmolality indicators hydration status
Accuracy weather forecast forern agroclimatic zone Haryana kharif season
Accuracy, reproducibility normal total body potassium (TBK) ranges measured renovated body 40K counter St Luke's-Roosevelt Hospital
Accurate measurement Cd, Cr, Cu Ni woodlice skins: moulting measure detoxification?
Accurate dye tracer concentration estimations image examination
Accurate diagnosis closely similar Dendrobium species multiple species-specific gDNA probes
Accurate milk standardisation eliminates individual cheese price-labelling
Accurate modeling assembling dummy gear based Pro/E software
Accurate modelling non-loglinear survival curves
Accurate planters - interseed spacing modelization
Accurate method measuring color values grain grain products visible-NIR instrument
Accurate whole-plant phenotyping - important constituent successful marker assisted selection (MAS)
Acephate methamidophos residues greenhouse field grown tomatoes
Acer floridanum - correct scientific Florida Maple
Aceria liopeltus Meyer (Acari - Eriophyidae) Asterolecanium conspicuum Brain (Hemiptera - Asterolecaniidae), potential biological control agents Acacia nilotica ssp. indica (Mimosaceae) Queensland, Australia
Aceria sheldoni.
Acerola's clones industrial interest
Acetamiprid (EPIK) neonicotinoid pest control orchards, vegetables ornamentals
Acetamiprid control sharpshooter citrus
Acetamiprid? A systemic insecticide fruit trees, vegetable crops tobacco
Acetanaerobacterium elongatum gen. nov., sp. nov., paper mill waste water
Acetate esters saturated unsaturated alcohols (C12-C20) major components Dufour glands Bracon cephi Bracon lissogaster (Hymenoptera - Braconidae), parasitoids wheat stem sawfly, Cephus cinctus (Hymenoptera - Cephidae)
Acetate-mediated production orotic acid ura3 mutants Candida albicans
Acetic acid fumigation apple rootstocks tree fruit scionwood remove external microflora potential plant pathogens
Acetic acid fumigation decay fungi food fodder grains storage
Acetic acid production acetic acid bacteria leading death survival