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Razvoj opreme za testiranje sistema prenosa momenta sile koji se koriste u poljoprivredi
No full textIt is a very common machine design task for engineers to create high-efficiency energy transfer, for which a standardized calculation methods as well as design factors determined by empirical and laboratory experiments are used. Contrary to general technical practice, these design factors are not always available for scaling the machine elements operating in agricultural and food industry equipment. Without this, we can only rely on the results of our own costly lifetime tests. Our aim is to create such a laboratory test bench with which the operation of the machine elements involved in the drive can be tested under working conditions.Veoma uobičajen zadatak za inženjere konstruktore mašina je konstrukcija visoko efikasnog prenosnika pogona, za koju se koriste standardizovane metode proračuna, kao i faktori koji određeni empirijskim i laboratorijskim ogledima. Nasuprot opštoj tehničkoj praksi, ovi elementi konstrukcije nisu uvek dostupni za kapacitet mašinskih elemenata primenjenih u opremi za poljoprivredu i prehrambenu industriju. Bez ovoga možemo da se oslonimo samo na rezultate dostupne rezultate sopstvenih ispitivanja. Naš cilj je da konstrušemo takav laboratorijski sto za testiranje na kome ćemo moći da ispitujemo rad mašinskih elemenata ugrađenih u prenosnik pogona u radnim uslovima
Primena tabelarnih proračuna u oblasti poljoprivrede
Get PDFPrikaz osnovnih koraka u radu sa programom za tabelarne proračune dat je u prvom
delu dokumenta i sadrži:
Osnovni izgled dokumenta i opcije za rad sa radnim listovima
Podešavanje radne površine - izmena dimenzija ćelije
Formatiranje ćelija
Kreiranje grafikona i opcije za njegovo editovanje
Primena funkcija (Pozivanje osnovnih, često korišćenih funkcija)
Priprema dokumenta za štamp
Secrets to Success with Project Proposals
Get PDFThis CaSA booklet 5 is a development of a document “Secrets to success with FP7 REGPOT proposals”, written whilst working for the Serbian former Ministry of Science and Technological Development as the Director, Consultative Bureau for International Projects from 2008 to 2011. It was put together specifically to help Serbian scientists improve the quality of their proposals for the FP7 REGPOT scheme, which at that time was the most popular sub-programme of FP7 for Serbian scientists. This original document has been modified through the CaSA Tempus project to make it more general in its approach and philosophy for writing project proposals, though many of the examples come from the FP7 REGPOT sub-programme. The advice is based on experiences of reading proposal drafts written by Serbian scientists, discussions with them and evaluation summary reports (ESRs) for their submitted proposals, as well as on experiences working with academics in the CaSA project. In this project, courses in Academic Skills for university teachers of Serbian agricultural faculties were held in 2014, and these courses included preparation of project proposals. A CaSA questionnaire completed by participants for the Academic Skills courses showed that lack of skills in proposal writing was the second biggest obstacle (after lack of time) to writing project proposals. Thus, the original document has now been updated as part of the CaSA project to focus on Horizon 2020 (H2020). This will meet the needs of university teachers to have a written document based on the Academic Skills course for future reference. The approach of this document is to focus largely on the philosophy needed for success rather than just advice on how to fill in the application forms. It aims to help put the applicants within the minds of the proposal reviewers and the funding programme managers to ensure that what is written is what they want to read and not what the applicant wants to write! This guide accompanies the Balkan Security Network (www.balkansecurity.net) European Project Proposal (EPP) training course PowerPoint™ presentation ‘Excellence in EU Project Proposal Writing’, also available as a YouTube video at www.youtube.com/watch?v=3jSQU-_tdA4. I hope you find the “Secrets to success ....” useful
Bioregulators Application in Pear Production
Get PDFThis short review report the results obtained with the main plant growth
regulators/plant bioregulators (PGRs or PBRs) that are currently tested or used as registered
pre-harvest and post-harvest compounds. The PBRs used in pre-harvest concern the
regulation of fruit setting, bearing, fruit thinning and of shoot growth control. The auxin-like
compounds are mainly used for fruit set and for pre-harvest drop control; Gibberellins for
fruit set; auxins and citokinins for fruit thinning/quality improvement and prohexadione-Ca
(Regalis) for shoot growth and fire-blight control. The PBRs for improving fruit quality and
storability can be used in pre- and post-harvest. Aminoethoxyvinylglycine (AVG) is used in
pre-harvest while 1- methylcyclopropene (1-MCP) can be used in cold storage room or, in
some countries, also in pre-harvest (Harvista) to affect fruit post-harvest maturation and
storability management
Medicinal Properties of Mushroom Coriolus Versicolor
No full textGljiva Coriohis versicolor (L. Ex Fr.) Pilat, sin. Trametes versicolor (L., Fr.) Lioyd, ispoljava znacajna antitumorka i imunostimulatorska svojstva sto je svrstava u lekovite gljive. Zbog cvrstog plodonosnog tela pripada nejestivim gljivama. Iz nje su izolovani polisaharidi za koje je dokazano da su bioloski aktivne materije. Aktivne komponente su fi-glukan-proteini koji pokazuju antitumoma, antiviralna, antibakterijska, antioksidativna i imunomodulatorska svojstva i ergosterol. Istrazivanja su pokazala da micelijum gljive C. versicolor sadrzi dve najznacajnije bioaktivne komponente PSK (polisaharid krestin) i PSP (polisaharid peptid). Pored ove dve komponente, sadrzi i polisaharid koriolan za koji je dokazano da ima visoko antitumorsko dejstvo.The mushroom Coriolus versicolor has significant antitumor properties and improves immunity. Because of tightly fruitful body this mushroom is inedible medicinal mushroom. From this mushroom are isolated polysaccharides that are biologically active substances. Biologically active substances from this mushroom are fl-glucan-proteins which have antitumor, antiviral, antibacterial and antioxidative properties and improve immunity. Studies have shown that mycelium of this mushroom has two significant biologically active substances PSK (polysaccharide krestin) and PSP (polysaccharide peptide). The mycelium contains polysaccharide coriolanus that has high antitumor effect
Brendiranje organskih proizvoda - Osnovi brendiranja
Get PDFZnacaj brendova u životu savremenog potrošaca; Potrošacke navike i sklonost potrošaca ka kupovini
brendirane robe; Benefiti koje potrošaci i kompanije imaju od brendirane robe; Koliko cesto i zašto
kupujemo brendiranu robu i usluge? Zašto se baviti brendiranjem... – ovo su samo neke od tema koje se
namecu kada je u pitanju poslovanje na savremenom tržištu
Vodič za čitanje i pretraživanje online resursa
Get PDFRazvoj informacionog društva i širenje informacionih tehnologija pruža nove
mogucnosti za ucenje istovremeno dovodeci u pitanje ustaljene obrazovne prakse
organizovanja nastavnog procesa. Obrazovne institucije, narocito one na tercijarnom nivou
obrazovanja, koriste internet i druge digitalne tehnologije za razvoj obrazovanja. Ipak, do
skoro su nastavni materijali bili zašticeni autorskim pravima i nije im se moglo pristupiti
bez lozinke. Cilj promovisanja otvorenih obrazovnih resursa (OER) jeste da omoguci
besplatno i slobodno širenje obrazovanja.
Otvoreni obrazovni resursi (OER) predstavljaju digitalizovane materijale koji su
ponudeni za slobodan i otvoren pristup edukatorima, studentima i drugima na korišcenje i
ponovnu upotrebu u cilju poducavanja, ucenja i istraživanja i koji sadrže sadržaj za ucenje
(otvoreni pristup), softverske alate (otvoreni kod) i resurse za implementaciju (otvoreni
standard) koji se odnose na licence intelektualnog vlasništva (OECD, 2007).
Razvojem interneta i otvorenih obrazovnih resursa sve više je tekstova dostupnih u
online okruženju. Smatra se da citanje u online kontekstu predstavlja novi vid citanja i da se
razlikuje od citanja štampanog teksta: kljucna razlika potice od same prirode hiperteksta u
kome se informacije redaju nesekvencijalno i multilinearno omogucavajuci razlicite putanje
i opcije u procesu citanja.
Ovaj materijal je zamišljen kao vodic za citanje i pretraživanje online resursa sa
posebnim osvrtom na oblast poljoprivrede i biotehnologije. U vodicu su predstavljeni
razliciti online resursi. Vodic za citanje i pretraživanje online resursa je pogodan za
upotrebu u razlicitim okruženjima a posebno u okruženju za e-ucenje i namenjen je
nastavnicima srednjih škola u oblasti poljoprivrede i srodnih disciplina, savetodavcima
poljoprivrednih strucnih službi ali i sadašnjim i buducim studentima poljoprivrede i srodnih
disciplina kao i strucnjacima u drugim oblastima.
Štampanje materijala je finansijski podržao TEMPUS projekat CaSA Building
Capacity of Serbian Agricultural Education to Link with Society, ciji je koordinator
Univerzitet u Beogradu, Poljoprivredni fakultet
A Guide for Reading and Using online Resources
Get PDFThe development of the information society and information technology gave rise to
new opportunities for learning and challenged established practices considering how
teaching and learning should be organized. Yet, until recently, much of the learning
materials were protected by propriety rights and not reachable without passwords. The open
educational resource (OER) movement aims to encourage and enable freely sharing content.
Open educational resources (OER) are digitalized materials offered freely and openly for
educators, students and self-learners to use and reuse for teaching, learning and research
(Center for Educational Research and Innovation, OECD, 2007) including learning content,
software tools, and implementation resources such as open licenses.
With the development of the World Wide Web and open educational resources,
more texts are now processed on screen. Reading in online environment is often considered
as reading practice that is different to that of reading in print. A key difference between the
two kinds of reading is considered to be rooted in the nature of hypertext where presentation
of information is not linear but multi-linear affording different access routes and different
reading options.
In order to put the reading into specific context, this material has been prepared as a
short guide for reading and using online resources in the field of agriculture. Various online
resources are presented, both generally and specifically for the agriculture and related
disciplines. A guide for reading and using online resources is designed to be used by high
school teachers in the field of agriculture and related fields, and agricultural advisors in
Serbia. It can be useful for the current and future students of both agriculture and other
fields of science, and for professionals in other domains.
Printing of the guide is funded by TEMPUS project CaSA Building Capacity of
Serbian Agricultural Education to Link with Society, coordinated by University of
Belgrade, Faculty of Agriculture
Photosynthesis Inhibition as a Tool for Apple Fruitlet Thinning
Get PDFThe possible mechanisms of apple fruitlet abscission are presented in this
paper. Prevailing hypothesis on hormonal triggered processes in the event of “correlative
dominance effects” of adjacent fruitlets or nearby shoot tips has the opponent theory of
assimilate supply dependent fruitlet abscission. Assimilation shortage may also be involved in
the correlative auxin processes but the connections of both statements are not clear yet. On
last years a lot of evidence is provided in support of assimilation dependent fruitlet abscission
process. At the time just after the end of the flowering, a strong competition between fruitlets
and shoots for photosynthates exist. Shading experiments comparable for a few days of
cloudy weather provoked strong natural apple fruitlet abscission. If the applications of
chemical thinners are followed by a few days of shading, much stronger abscission occurs
comparing to thinner applications without shade. A photosynthesis inhibitor metamitron has
gone into registration for fruitlet thinning purpose and is available in Europe last year. A good
thinning results can be achieved up to 14 mm king fruit diameter, but additional studies
should be made to adapt dosage for the present and predicted light intensity at the time just
after metamitron application
The Influence of 1-Methylcyclopropene on Fruit Quality of “Granny Smith” Apple Cultivar Depending on Applied Concentration and Storage Conditions
No full textU radu su prikazani rezultati ispitivanja delovanja 1-metilciklopropena (1-
methylcyclopropene, 1-MCP) na kvalitet plodova jabuke sorte „Granny Smith“. 1-MCP je
inhibitor delovanja etilena koji se veže za receptore etilena i na taj način usporava sazrevanje
plodova i produžava njihovo čuvanje. 1-MCP je primenjen u periodu od 5 dana nakon berbe u
koncentracijama od 0, 500, 1000 i 2000 ppb i to sa i bez prisustva egzogenog etilena
poreklom iz druge zrele jabuke. Nakon tretmana plodovi su smešteni u hladnjaču sa
kontrolisanom atmosferom u dve komore sa različitim sastavom gasova. Analize plodova su
izvedene neposredno nakon iskladištenja, ali i nakon dodatnog čuvanja u komori sa
normalnom atmosferom, kao i nakon čuvanja na sobnoj temperaturi. Rezultati su pokazali da
1-metilciklopropen može u značajnoj meri da pomogne očuvanju kvaliteta jabuke tokom
skladištenja u hladnjačama. Nevezano za primenjenu koncentraciju, 1-MCP značajno utiče na
očuvanje čvrstine ploda, čak i nakon iskladištenja odnosno čuvanja plodova na sobnoj
temperaturi, a pokazalo se i da sadržaj ukupnih kiselina u tretiranim plodovima sporije opada
u odnosu na netretirane plodove. Nije bilo uticaja tretmana na sadržaj rastvorljivih suvih
materija. Sve ispitivane koncentracije 1-MCP-a su efikasno suzbile pojavu posmeđivanja
pokožice zelenih plodova (skald) samo u uslovima kada je tretman vršen u komori bez
prisustva plodova jabuke drugih sorti. U tretmanu sa prisustvom egzogenog etilena, 1-MCP
nije sprečio pojavu skalda. Koncentracija od 500 ppb nije dala zadovoljavajuće rezultate kod
svih ispitivanih parametara, te je preporučljivo da se koristi koncentracija od 1000 ppb.
Koncentracija od 2000 ppb je dala iste rezultate kao i 1000 ppb, pa stoga nema opravdanja za
njenu primenu.The paper presents the results of 1-methylcyclopropene (1-methylcyclopropene, 1-
MCP) influence on fruit quality of “Granny Smith” apple cultivar. 1-MCP is an inhibitor of
ethylene action which binds to the receptors of ethylene and thus delays the maturity of fruit,
and prolongs their storage. 1-MCP is applied in a period of 5 days after harvest at
concentrations of 0, 500, 1000 and 2000 ppb, each with and without the presence of
exogenous ethylene from other ripe apples. After treatment, the fruits were stored in cold
storage with controlled atmosphere (CA) in two separate chambers with different composition
of the gases. Fruits analyses were made immediately after CA storage, after additional storage
in normal atmosphere, and after room temperature shelf life. The results showed that 1-
methylcyclopropene can significantly help preserve the quality of apple during cold storage.
Irrespective of the applied concentration 1-MCP significantly affects retention of fruit
firmness even during shelf life, and also affects the total acids (TA) content in the treated
fruits by slowing down drop of TA compared to untreated fruits. There was no treatment
effect on total soluble solids content. All tested concentrations of 1-MCP effectively suppress
the occurrence of superficial scald in circumstances where the treatment is carried out in the
chamber without the presence of other apple cultivars. In the case where the treatment is done
in presence of exogenous ethylene 1-MCP has not prevented scald occurrence. A
concentration of 500 ppb has not yielded satisfactory results with all investigated parameters,
while a concentration of 1000 ppb is recommended to be used. The concentration of 2000 ppb
gives the same results as 1000 ppb and there is no justification for its application