691 research outputs found
Impact of plant elicitors on ammonia-oxidizing root and rhizosphere communities in winter wheat
Nitrogen is one of the essential nutrients for plants. Nitrogen is taken up as ammonium (NH4+) or nitrate (NO3-) from roots. If not taken up by the plants, nitrate can be lost to the atmosphere by denitrification which contributes to the global warming. Nitrate can leach out in aquatic systems, this can cause eutrophication, thus itâs important to save the nitrogen in soil. Nitrate can be added as fertilizer or produced by a microbial process called nitrification. The first step of nitrification is the oxidation of ammonia, done by ammonia oxidizing archaea, ammonia oxidizing bacteria and comammox (Nitrospira). This first step is also the rate limiting step of this process.
Plant elicitors such as cis-jasmone, methyl jasmonate and methyl salicylate are used in pest management but there are also indications that they trigger the production of secondary metabolites that can be found in root exudates and inhibit ammonia oxidizers. However, our knowledge on their effect on soil microbes remains limited.
The hypothesis was that treating winter wheat with elicitors will alter the soil ammonia-oxidizing communities without negatively affecting plant performance. The first aim was to determine the abundance, composition and activity of the ammonia oxidizing root and rhizosphere communities. The second aim was to measure plant traits both above- and below ground. The third aim was to assess effects of ammonium availability of the elicitor treated plants.
The elicitor treatments showed most effects in the fertilized pots. The elicitors had most significant effects on the ammonia-oxidizing root communities compared to the rhizosphere communities. Methyl jasmonate showed most significant effects and methyl salicylate showed second most significant effects of both decreased microbial abundance and changed community composition. In both cases the plant traits were positively affected except for the shoot biomass. However, it is possible that this effect is temporary and that a longer growth period would allow an increase in the shoot biomass. Cis-jasmone showed no significant effect on microbial abundance but a trend of changed composition. Cis-jasmone positively affected below-ground plant performance.
Methyl jasmonate seems to be the most promising elicitor and methyl salicylate is the second promising elicitor. Cis-jasmone is still interesting, showing positive effects on plant performance although limited effect on microbial abundance. Fertilizer as ammonium chloride increase the effects of the elicitor treatments limited to the roots microbial community. We should continue use cis-jasmone, methyl jasmonate and methyl salicylate to see how they can be used in practical agriculture and in different crops.KvÀve Àr ett essentiellt nÀringsÀmne för vÀxter. KvÀve tas upp som ammonium (NH4+) eller nitrat (NO3-) genom vÀxtrötterna. Nitrat Àr lÀttrörligt i jorden, om nitrat inte utnyttjas av vÀxter kan det försvinna till atmosfÀren genom denitrifikationen, detta bidrar till den globala uppvÀrmningen. Nitrat kan ocksÄ lÀcka ut till vattendrag och orsakar övergödning, det Àr dÀrför viktigt att spara kvÀvet i marken. Nitrat kan tillföras genom gödsel eller bildas genom mikrobiella processer i marken via nitrifikationen. Ammoniakoxideringen Àr det första steget i nitrifikationen vilket bestÀmmer hasigheten av nitrifikationen. Ammoniak oxideras av ammoniak oxiderande arkéer, ammoniak oxiderande bakterier eller comammox (Nitrospira). VÀxt-elicitorer som cis-jasmonsyra, metyljasmonsyra och metylsalicylsyra inducerar försvarsmekanismer mot herbivorer och patogener. Det finns indikationer om att elicitorer kan ocksÄ trigga syntes av sekundÀra metaboliter i rotexudatet som inhiberar ammoniakoxiderande mikrober i jorden. Kunskapen om effekten pÄ jordmikrober Àr dock minimal.
Hypotesen var att elicitorer pÄverkar det ammoniakoxiderande mikrobsamhÀllet som Àr kopplat till höstvete, utan negativ pÄverkan pÄ vÀxtens tillvÀxt. Det första syftet var att mÀta rot- och rhizosfÀrsamhÀllets storlek, komposition och aktivitet. Det andra syftet var att mÀta vÀxtens ovan- och underjordiska delar för att undersöka vÀxtens tillvÀxt av behandlingarna. Det tredje syftet var att bedöma eventuella effekter frÄn ammoniumgödsling pÄ elicitorbehandlade plantor.
Elicitorbehandlingarna visade mest signifikant effekt i de gödslade leden. RotmikrobsamhÀllet visade fler signifikanta effekter jÀmfört med rhizosfÀrmikrobsamhÀllet.
Metyljasmonsyra visade flest signifikanta effekter och dÀrefter metylsalicylsyra. Dessa reducerade storleken pÄ rotmikrobsamhÀllet, förÀndrade samhÀllets komposition, samt hade positiv pÄverkan pÄ vÀxtens tillvÀxt förutom skottbiomassa. Det Àr dock möjligt att denna effekten Àr temporÀr och efter en lÀngre tillvÀxtperiod ökar skottbiomassan. Cis-jasmonsyra visade inga signifikant skillnader pÄ mikrobsamhÀllets storlek, men en trend pÄ förÀndrad komposition. Cis-jasmonsyra visade ÀndÄ positiv pÄverkan pÄ rottillvÀxten.
Metyljasmonsyra Àr den mest lovande elicitoren och metylsalicylsyra den nÀst lovande elicitoren. Cis-jasmonsyra Àr fortfarande intressant dÄ den visade ha positiv inverkan pÄ vÀxtens tillvÀxt men begrÀnsad pÄverkan pÄ mikrobsamhÀllets storlek. Gödsel som ammoniumklorid visade sig ge en förstÀrkt effekt pÄ elicitorbehnadlingarna, begrÀnsad till rotmikrobsamhÀllet. Vi bör fortsÀtta anvÀnda cis-jasmonsyra, metyljasmonsyra och metylsalicylsyra för att se hur de kan anvÀndas i praktiskt jordbruk och vilken effekt de har i oliak grödor
Digital games as a design tool : proposal for outdoor play design
Dagens förskolebarn Àr den första riktigt digitala generationen. De har vuxit upp med datorer och Internet sedan de kom till vÀrlden. Följaktligen Àr barns vÀrld idag bÄde analog och digital och barnen rör sig ledigt mellan
dessa tvÄ vÀrldar. Digitala spel har gjort att barn förstÄr sig pÄ den nya tekniken pÄ ett sÀtt som vuxna inte gör. Digitala spel vÀdjar till barns fantasi och ger ett alternativ till verkligheten AFK (Away From Keyboard). Utomhusmiljön i sin tur lockar genom att erbjuda barnen en miljö som Àr spÀnnande och fantasieggande, dÀr de har mycket att upptÀcka och utforska.
I naturen finns fĂ„ saker som barn inte kan anvĂ€nda i sin lek, enbart deras fantasi sĂ€tter grĂ€nser. Syftet med det hĂ€r arbetet Ă€r att hitta en ny ingĂ„ng till hur en lekpark kan gestaltas, med utgĂ„ngspunkt i den digitala vĂ€rlden. Vi vill visa ett alternativ till âdigitalâ-konceptparker och lekparker som enbart bestĂ„r av utplacerade lekredskap.
SÄledes var vi nyfikna pÄ om det kan vara möjligt att aktivera och attrahera, framförallt barn och ungdomar till den fysiska utemiljön, genom att plocka in egenskaper frÄn digitala spel i designprocessen för utormning av lekparker.
Med vden hÀr uppsats har vi haft som mÄl att ta fram ett generellt tillvÀgagÄngssÀtt, ett designverktyg, som kan anvÀndas för att skapa en attraktiv lekmiljö.
Arbetet bygger pÄ samtal med speltillverkare, spelutövare och en pedagog samt litteraturstudier, platsbesök och en pilotstudie av designverktyget. Litteraturstudierna har fokuserat pÄ vilka effekter anvÀndandet av den digitala
vÀrlden och lek utomhus har pÄ framför allt barn och ungdomar. Vi har anvÀnt oss av det populÀra spelet Minecraft som modellspel och frÀmsta studieobjekt för den digitala vÀrlden. DÀrför Àgnade vi tid Ät att spela spelet
för att fÄ en förstÄelse för dess uppbyggnad, attraktionskraft samt dess fördelar och nackdelar.
Undersökningen av spelet Minecraft tillsammans med litteraturstudierna och samtalen har gjort det möjligt för oss att identifiera de egenskaper som finns i det digitala spelet. För att testa vÄra idéer har vi valt att applicera
dem i utformandet av ett tÀvlingsförslag i en arkitekttÀvling för en lekpark i Lill-Valla i Linköping. I gestaltningsarbetet har vi till stor del arbetat traditionellt med skisser och designexperiment. I utformningen av lekparken i Lill-Valla har vi inkorporerat den kunskap om digitala spels egenskaper som vi förvÀrvat genom vÄr undersökning.
En av de viktigaste utgÄngspunkterna i arbetet Àr att vi tror att det i en vÀrld i stÀndig förÀndring krÀvs nya perspektiv pÄ lekmiljöer för barn och unga. Vi vill vÀcka frÄgan kring hur balansen mellan anvÀndandet av digital media och utomhuslek kan se ut för barn och ungdomar.
VĂ„rt arbete ligger i grĂ€nssnittet mellan landskapsarkitektur och digitala spel. Det riktar sig frĂ€mst till landskapsarkitekter.Todayâs preschoolers are the first digital generation. Meaning that theyâve grown up with computers and the Internet from the day they were born into this world. The children of todayâs reality are there for both analogue
and digital and move between the physical world and the digital world with ease. Digital games have prepared todayâs children to understand the new technology in a way that adults donât do. Digital games appeal to childrenâs
imagination and provide an alternative to the physical world, AFK (Away From Keyboard).
On the other hand the outdoor environment and nature does attract, by offering an exciting imaginative environment where children have much to discover and explore. In nature, there are few things that kids canât find a way to play with, only their imagination sets the limit.
The aim of this Master thesis was to find new input to how a playground can be designed based on the digital world. We wanted to produce an alternative to âdigitalâ theme parks and playgrounds that only present set play equipment. We are curious to see if it is possible to activate and attract, mainly, children and young people to the outdoor environment and the playground, by picking incorporating properties from digital games in to the design of playgrounds.
In this paper, our goal is to develop a general approach, a design tool that can be used to create an attractive play environment. The work is based on conversations with game developers, game practitioner, an educator as well as research of written data (papers, books and articles), site visits and a trial study of the design tool. We found most of the data on the effects of childrenâs and adolescentâs use of the digital world and outdoor play through studies of papers and articles on the subject. We have also used the popular game Minecraft as a prototypical game and
spent time playing the game to gain an understanding of its structure, appeal, advantages and disadvantages.
The study of the game Minecraft, reference literature and the dialogues with said practitioners, made it possible for us to identify the features that are available in digital games. To further investigate our ideas, we chose to apply them in developing a design proposal for a childrenâs playground in an architectural competition in, Linkoping. In the design process for the playground, we have mainly worked traditionally with sketches and design experiments, but we have integrated our knowledge of the properties of
digital games, that we acquired throughout our research.
One of the central starting points for our thesis is that we believe, that in a world that is constantly changing new perspectives on how we view play environments for children and young people is required. We want to raise the question of the balance between the use of digital media and outdoor
play and see if, and if so, in what way features from digital games can be a part of the design process for creating outdoor playgrounds.
Our master thesis lies at the crossroads between landscape architecture and digital games. Our thesis is intended mainly for landscape architects
After-school clubs as a supporter of the daily life and well-being of the child and family : An example of Tennis- ja mailapelikoulu by Grani Tennis
TÀmÀn pro gradu -tutkielman tarkoituksena oli selvittÀÀ, minkÀlainen merkitys koulun jÀlkeisellÀ iltapÀivÀtoiminnalla on lapsen ja perheen arjen sekÀ hyvinvoinnin tukemisessa. Tavoitteena on tuoda esille laadukkaaseen iltapÀivÀtoimintaan kuuluvia tekijöitÀ, joilla arkea ja hyvinvointia tuetaan. IltapÀivÀtoimintaa sekÀ sen yhteyksiÀ hyvinvoinnin tukemiseen liittyen on tutkittu vÀhÀn. Aiemmat tutkimukset ovat kuitenkin osoittaneet, ettÀ lapsen ja vanhempien vÀlisellÀ hyvinvoinnilla on vahva yhteys. Jonkun perheenjÀsenen hyvinvointi tai pahoinvointi vaikuttaa siis muuhunkin perheeseen. IltapÀivÀtoiminnalla on aiempien tutkimusten mukaan suuri merkitys vanhempien työ- ja perhe-elÀmÀn yhdistÀmisessÀ sekÀ lapsen yksinÀisen ajan vÀhentÀmisessÀ koulupÀivÀn jÀlkeen. IltapÀivÀtoiminnalla on myös tÀrkeÀ merkitys lapsen sosiaalisten suhteiden ja terveellisten elÀmÀntapojen vahvistamisessa.
Tutkimus toteutettiin laadullisena tutkimuksena. Aineisto kerÀttiin teemahaastatteluina haastattelemalla kahdeksaa Grani Tenniksen jÀrjestÀmÀÀn Tennis- ja mailapelikoulu -iltapÀivÀkerhoon osallistuvien lasten vanhempaa. Tutkimusasetelma oli fenomenografinen, eli tavoitteena oli ymmÀrtÀÀ ja kuvata vanhempien antamia merkityksiÀ tutkittavalle ilmiölle. Aineisto analysoitiin hyödyntÀen teoriaohjaavaa sisÀllönanalyysiÀ, jossa teoriana toimi tutkielman teoreettinen viitekehys.
Tutkimuksessa nousi esille iltapÀivÀtoiminnan tÀrkeÀ merkitys lapsen ja perheen arjen rytmittÀmisessÀ sekÀ hyvinvoinnin tukemisessa. Toiminta mahdollistaa vanhemmille tÀysipÀivÀisen työssÀ kÀymisen. Vanhemmat kokivat tÀrkeÀksi, ettÀ lapsella on jokin turvallinen paikka, jossa voi viettÀÀ aikaa koulupÀivÀn jÀlkeen vanhempien ollessa vielÀ töissÀ. Vanhempien hyvinvointia tukee se, ettÀ arkea ei kuormita ylimÀÀrÀinen suunnittelu liittyen lapsen yksinÀisen ajan vÀhentÀmiseen. Lapsen ja vanhempien hyvinvoinnilla koettiin olevan myös vahva yhteys. IltapÀivÀtoiminta tukee erityisesti lapsen sosiaalista, psyykkistÀ ja fyysistÀ hyvinvointia. IltapÀivÀtoimintaa tulisi Suomessa vanhempien mukaan kuitenkin kehittÀÀ niin, ettÀ ohjaajia on riittÀvÀsti ja heillÀ on taitoa toimia erilaisten lasten ja tuen tarpeiden kanssa. Jokaiselle lapselle tulee tasa-arvoisesti varmistaa turvallinen paikka kehittyÀ ja kasvaa. Koska iltapÀivÀtoiminta on maksullista, sitÀ tulisi kehittÀÀ myös niin, ettÀ sen hyödyntÀminen olisi mahdollista jokaiselle sitÀ tarvitsevalle perheelle ja lapselle.The purpose of this Master's thesis was to find out what kind of role after-school clubs play in supporting the daily life and well-being of the child and family. The objective is to highlight the factors that are part of a high-quality after-school club. After-school clubs, as well as its connections with well-being support, have been little studied. However, previous research has shown that there is a strong connection between child and parental well-being. So, the well-being or ill-being of someone affects other family members as well. According to previous research, after-school clubs play a large role in combining parents' work and family life, as well as reducing a child's lonely time after school. After-school clubs also play an important role in strengthening the child's social relations and healthy lifestyle.
The study was conducted as a qualitative study. The data were collected as themed interviews by interviewing eight parents of children attending Tennis- ja mailapelikoulu -after-school club organized by Grani Tennis. The research setting was phenomenographic, meaning the goal was to understand and describe the meanings given by parents to the phenomenon being studied. The data was analyzed using theory-driven content analysis in which the theoretical framework of the thesis served as the theory.
The studyâs results highlighted the important role of after-school clubs in organizing the daily life of the child and the family and in supporting everyoneâs well-being. They allow parents to work full-time. While working, it is important to have a safe place for their child to spend time after school. Parental well-being is supported by the fact that the daily life is not burdened with additional planning in relation to reducing the child's lonely time. The well-being of the child and parents was also perceived to have a strong connection. After-school clubs particularly support the child's social, psychological, and physical well-being. After-school clubs in Finland, however, should be still developed more so that there are enough instructors that have the skills to work with different children and supporting their needs. It should be ensured that every child has equally a safe place to develop and grow. As after-school clubs are fee-required, they should also be developed so that every family has the possibility to use them in their daily life
Seed treatment with plant-defense elicitors decreases the abundance of ammonia oxidizers associated with winter wheat roots
Priming with elicitors, including phytohormones, is known to induce physiological changes in plants that affect resource allocation and nutrient uptake strategies. However, effects of these changes on belowground microbial communities, particularly those involved in nitrogen (N) transformations, remain poorly characterized. Here, we tested the hypothesis that treating seeds with elicitors would affect N-transforming communities associated to roots and rhizosphere, influencing soil N availability and thus plant performance. We measured the effects of treating winter wheat seeds with cis-jasmone, methyl jasmonate or methyl salicylate on plant traits and on the genetic potential for ammonia oxidation by ammonia-oxidizing bacteria (AOB) and archaea (AOA), the initial inorganic N transformation process resulting in N loss. Elicitors reduced the genetic potential for ammonia oxidation by AOB in root-associated microbial communities and increased traits reflecting N uptake in winter wheat. Proposed mechanisms include increased exploitative competition for ammonium, limiting substrate availability for microorganisms, and induced biological nitrification inhibition capacity actively suppressing ammonia oxidizers. There were minor effects on the composition of the AOB and AOA communities, but an indicator species analysis showed that several AOB and a few AOA genotypes were indicative of elicitor treatments. Seed treatment with elicitors may represent an overlooked strategy to minimize nitrification to mitigate N losses from arable soils
En hÀlsofrÀmjande skog Àr en gammal skog
Intresset för naturvistelse, frÄn allmÀnheten sÄvÀl som frÄn privata- och offentliga aktörer, har
nyligen ökat och forskning i Àmnet har kunnat pÄvisa allt tydligare resultat vilka föresprÄkar naturen
som hÀlsofrÀmjande arena. Detta har bidragit till att det idag finns ett behov av att öka vÄr förstÄelse
kring vilka kvaliteter i naturen som Àr vÀrdefulla ur hÀlsosynpunkt, för att kunna identifiera, skydda
och utveckla dessa miljöer för framtiden. Syftet med arbetet var dÀrför att undersöka vilka
upplevelsevÀrden och miljörelaterade egenskaper som bÀst kan förutsÀga en miljös naturhÀlsovÀrde
och via dessa identifiera hÀlsofrÀmjande naturomrÄden.
UpplevelsevĂ€rdena; Vildhet, Rofylldhet, Artrikedom, Kultur och Ăppenhet, vilka vetenskapligt
visats vara viktiga för en hÀlsofrÀmjande miljö, samt ett naturhÀlsovÀrde inventerades pÄ 203
slumpmÀssigt utlagda platser i VÀsterbottens lÀn. Via miljörelaterade egenskaper för de olika
provpunkterna undersöktes vilka egenskaper som Àr viktiga för ett omrÄdes hÀlsofrÀmjande
potential. Detaljerad analys av naturhÀlsovÀrden i skogsmiljöer utfördes dÀrefter av 157 provpunkter
pÄ skogsmark.
Resultatet visar att en hög Älder pÄ skogen Àr den enskilt viktigaste egenskapen tillsammans med
impediment och ett lÄngt avstÄnd till exploaterad mark för att kunna förutsÀga om ett skogsomrÄde
Àr hÀlsofrÀmjande. Vidare Àr upplevelsevÀrdena Vildhet och Rofylldhet bÀst lÀmpade för att
identifiera ett högt naturhÀlsovÀrde. I kartan över VÀsterbottens lÀn ses att större omrÄden av
hÀlsofrÀmjande skogar frÀmst Àr belÀgna i de vÀstra delarna medan mindre omrÄden ligger i öst, nÀra
samhÀllen och vÀgar. Resultatet Àr av vikt sÄvÀl för intressenter i skogen som planerar
skogsbruksÄtgÀrder och nya rekreationsomrÄden, som för de som vill besöka hÀlsofrÀmjande skogar.The interest in outdoor visits, from private and public actors, has recently increased as researchers
are reaching consensus about nature as a reliable health-promoting arena. Therefore, there is a need
to increase our understanding of nature characteristics that are valuable from a health perspective,
to be able to identify, protect and manage these environments for the future. The purpose was
therefore to investigate which Perceived Sensory Dimensions and environmental characteristics, that
best ca n predict the âNa ture Hea lth Va lueâ (NHV) a nd through these identify hea lth -promoting
areas.
The Perceived Sensory Dimensions; Wild, Serene, Species richness, Culture and Space, which
are scientifically proven to indicate health-promoting environments, were along with the NHV,
assessed at 203 randomly placed sites in VĂ€sterbotten County. Through available data of
environmental characteristics in the inventoried points, an area's health-promotive potential were
investigated. Detailed analysis of health values was then performed on 157 points on forest land.
The results show that an old forest is the single most important characteristic for identifying a
health-promoting forest along with impediments and a long distance to exploited land. Furthermore,
Wild and Serene are best suited for identifying a high NHV and thus finding health-promoting
forests. The map of VĂ€sterbotten County shows that larger areas of health-promoting forests mainly
are located in the west, while smaller areas are located in the east, close to communities and roads.
The result is important for forest related stakeholders to plan forestry measures and new recreational
areas, or to act as a basis for those who just want to visit health-promoting forests
Att styra och stÀlla En styrningsstudie med ResursCentrum för kvinnor som fall
In 1994 it was decided that a new network based organizational model was to be initiated to face the problems of some of the gender inequalities in Sweden. The organisation structure was named Resource Centre for Women (ResursCentrum för kvinnor). This essay constitutes a qualitative case study of governing, with this organisation structure as my field of inquiry. My ambition has been to outline and explain what kind of governing has been used and how it works. I have also tried to identify potential changes of the ways of governing over time. To help me out with that task, I have applied a theoretical framework, characterized of a governance perspective, and have used terms as: governing with networks, partnership, projects and visionary government to interpret my empiric material. My result shows that there have been various changes in the ways of governing, from a more hierarchal government form of governing to a more governance based one
Reformation of the yard The Fox
Omgestaltning av bostadsgĂ„rden RĂ€ven pĂ„ Ă
kerbyvÀgen i TÀby, norr om Sthlm
The problem with pink kernels in malting barley
Rosa kÀrnor anvÀnds som en indikator för att överskumning, s.k gushing kommer att uppstÄ pÄ
ölbryggerier. För att analysera rosa kÀrnor görs en okulÀr analys. Denna har fÄtt kritik för att inte
vara tillförlitlig nog att identifiera partier som orsakar gushing.
Det hÀr arbetet gjordes dels genom en litteraturstudie, dels genom en analys av data frÄn en
svensk spannmÄlshandlare (2013-2018) för att undersöka andelen underkÀnda maltkornspartier pga.
rosa kÀrnor och för att se om det fanns Ärsvariationer av förekomsten av rosa kÀrnor eller skillnader
i förekomsten mellan regioner i Sverige. Dataanalysen visade att rosa kÀrnor förekommer ungefÀr
lika mycket i de regioner i Sverige som undersöktes. 2017 förekom det mest rosa kÀrnor och 2018
förekom det minst i alla regioner.
Gushing orsakas av proteinerna hydrofobiner och ns-LTP. Ns-LTP kommer frÄn vÀxter och
hydrofobiner frÄn Ascomyceter och Basidiomyceter. Det rÄder delade meningar om vilka
svamparter som orsakar rosa kÀrnor i maltkorn som leder till problem med gushing. Det kan till stor
del vara kopplat till axfusarios som orsakas av Fusarium spp. och Microdochium nivale men det
finns uppgifter om att det kan vara andra mikroorganismer som orsakar rosa kÀrnor och gushing.
Det finns inte nÄgra tydliga rekommendationer kring ÄtgÀrder för att minimera förekomsten av rosa
kĂ€rnor i fĂ€lt mer Ă€n att förekomsten av rosa kĂ€rnor ökar vid sen tröskning. Ăr rosa kĂ€rnor till stor
del orsakat av axfusarios finns det flera rekommendationer för att frÀmst förebygga infektion i
vÀxande gröda.
Det behövs mer forskning och utveckling för att hitta orsaken till rosa kÀrnor och sÀkrare
analyser som förutser gushing, om det finns svampar som producerar hydrofobiner som leder till
kraftigare gushing, och om det finns metoder som kan anvÀndas under mÀltning för att minimera
hydrofobinproduktionen, till exempel att tillsÀtta mikroorganismer.Pink kernels are used to indicate if a malting barley lot can cause gushing in the brewing industry.
A visual assessment is used and has been criticized because the results are not always correct to
identify gushing.
The present study is based on a literature survey and a data analysis from a Swedish grain trader
(2013-2018). The data was analyzed by the rejected cereals lot caused by pink kernels, in relation
to seasonal variations and differences between regions in Sweden. The data analysis showed that
pink kernels were most common in 2017 and least common in 2018 in all regions. Pink kernels
occurred in approximetely the same amounts in all regions.
Gushing is caused by ns-LTP from plants and hydrophobins from Ascomycetes and
Basidiomycetes. There are various opinions about which fungi that causes pink kernels and later the
problem with gushing. It can be related to Fusarium head blight, caused by Fusarium spp. and
Microdochium nivale but there are indications that other microorganisms can also cause pink kernels
and gushing. There are no distinct recommendations to minimize pink kernels in the field, other than
harvest in time as late harvest increase the presence of pink kernels. If pink kernels are caused by
similar fungi and factors as fusarium head blight, there are recommendations to prevent infection in
the crop.
More research and development is needed to find the cause of pink kernels and assure analyzing
methods to previse gushing. Research is needed about fungi producing hydrophobins that makes
heavier gushing and if microorganisms can be used to decrease the synthesis of hydrophobins in the
brewing industry
Agreement between methods of measurement with multiple observations per individual
Limits of agreement provide a straightforward and intuitive approach to agreement between different methods for measuring the same quantity. When pairs of observations using the two methods are independent, i.e., on different subjects, the calculations are very simple and straightforward. Some authors collect repeated data, either as repeated pairs of measurements on the same subject, whose true value of the measured quantity may be changing, or more than one measurement by one or both methods of an unchanging underlying quantity. In this paper we describe methods for analysing such clustered observations, both when the underlying quantity is assumed to be changing and when it is not
Copepods in a changing sea : Ocean acidification, long-term changes and short-term variability
Anna-Karin Almén conducted field and lab work for this thesis at TvÀrminne Zoological Station
- âŠ