Search results for "dab"
showing 10 items of 1280 documents
BIODEGRADING BIOFILMS ON INNOVATIVE BIOPOLYMERIC SUPPORTS
2022
ABSTRACT Water bioremediation is traditionally carried out using ‘ free ’ bacterial cells, however, in recent years, utilization of ‘immobilized’ bacterial cells on adsorbing matrices, has gained attention as a promising technique due to biotechnological and economic benefits (Sonawane et al., 2022). Bacterial biofilms show greater resilience, survival and degradative activity for longer periods than cells in the planktonic state (Alessandrello et al., 2017); moreover immobilization reduces bioremediation costs, eliminate cell dilution and dispersion in the environment (Bayat et al., 2015). Possible applications of immobilized biodegrading bacteria require long-term survival and maintenance…
Kopīgo resursu pārvaldība krīžu saplūšanas laikā
2022
Kolektīvā monogrāfija “Kopīgo resursu pārvaldība krīžu saplūšanas laikā” apkopo galvenās pētnieciskā projekta “Gatavi pārmaiņām? Kopīgo dabas resursu ilgtspējīga pārvaldība” (LZP-2019/1-0319) (projekta vadītājs LU SZF SPPI vadošais pētnieks Jurijs Ņikišins) atziņas.
Antibacterial biopolymeric foams: Structure–property relationship and carvacrol release kinetics
2019
Abstract In this work, the feasibility of antibacterial biopolymeric foams containing carvacrol (CRV) for potential food packaging applications was investigated. Sodium bicarbonate (SB) was chosen as foaming agent and a commercial biodegradable polymer, Mater-Bi® (MB), as a matrix. MB/SB and MB/SB/CRV systems were prepared by melt mixing and the foaming process was conducted in a laboratory press. The influence of foaming agent and antibacterial additive content was investigated. The foamed samples were characterized through morphological analysis, mechanical tests and measurements of CRV release kinetics. Moreover, a mathematical model, i.e. power law model, was used to fit the release dat…
On the lattice of prefix codes
2002
AbstractThe natural correspondence between prefix codes and trees is explored, generalizing the results obtained in Giammarresi et al. (Theoret. Comput. Sci. 205 (1998) 1459) for the lattice of finite trees under division and the lattice of finite maximal prefix codes. Joins and meets of prefix codes are studied in this light in connection with such concepts as finiteness, maximality and varieties of rational languages. Decidability results are obtained for several problems involving rational prefix codes, including the solution to the primeness problem.
m.quadriceps statisku slodzi pavadošās hemodinamiskās reakcijas augšstilba maģistrālo artēriju gultnēs
2013
m.quadriceps statisku slodzi pavadošās hemodinamiskās reakcijas augšstilba maģistrālo artēriju gultnēs Pētījums veltīts perifēro artēriju un pretestības asinsvadu tonusa regulācijas īpatnību izpētei, reģionālai muskuļu asinsvadu gultnei iekļaujoties dažāda rakstura hemodinamiskās reakcijās. Promocijas darba pirmajā etapā tika veikti tālākā pētījumā izmantojamo metožu teorētiskā pamatojuma un praktiskās realizācijas pilnveidojumi: fotopletizmogrāfijas metodei – audu tilpuma pulsa un atsevišķas artērijas pulsa reģistrācijas metožu informativitātes salīdzinājums, artēriju ultrasonogrāfijas metodei – oriģinālas programmatūras izstrāde un aprobācija artērijas morfometrisko un asins plūsmas param…
Bagging and Boosting with Dynamic Integration of Classifiers
2000
One approach in classification tasks is to use machine learning techniques to derive classifiers using learning instances. The co-operation of several base classifiers as a decision committee has succeeded to reduce classification error. The main current decision committee learning approaches boosting and bagging use resampling with the training set and they can be used with different machine learning techniques which derive base classifiers. Boosting uses a kind of weighted voting and bagging uses equal weight voting as a combining method. Both do not take into account the local aspects that the base classifiers may have inside the problem space. We have proposed a dynamic integration tech…
Boscia, Cadaba, Capparis
1993
The family Capparaceae is represented in Somalia by various genera. Among these the genus Boscia includes 6 species, the genus Cadaba includes 10 species, and the genus Capparis 4 species. A description and key are furnished for the genera. For each species the description, ecology and distribution are reported.
Četrgadīgu bērnu pētniecisko prasmju pilnveide dabas zinību mācību jomas centrā
2021
Kvalifikācijas darbs: Četrgadīgu bērnu pētniecisko prasmju pilnveide dabas zinību mācību jomas centrā. Darba autore: Ivanda Balsa Darba zinātniskā vadītāja: profesore, Dr.paed. Maruta Sīle Pētījuma mērķis: Pētīt pētniecisko prasmju pilnveides iespējas dabas mācību jomas centrā četru gadu veciem bērniem. Pētījuma uzdevumi: 1.Analizēt zinātniskās teorijas par pētnieciskajām prasmēm, 2. Raksturot pētnieciskās prasmes četrgadīgiem bērniem, 3. Organizēt empīrisko pētījumu un pamatot metožu izvēli, 4. Analizēt empīriskā pētījuma iegūtos datus. Darba ietvaros tika organizēts un veikts empīriskais pētījums pirmsskolas izglītības iestādē “X” par pētniecisko prasmju pilnveides iespējām dabas zinību m…
Estimation of measures of effectiveness (MOE) for the C- Roundabouts
2013
The C-roundabout (cyclist roundabout) is a new multi-lane roundabout designed to improve the safety of cyclists at and make multi-lane roundabouts more cyclist-friendly. The geometric layout of C-Roundabouts allows the decrease of the vehicle speeds through the roundabout to around 30 km/h. The rare C-roundabout installations so far implemented in the world have not allowed analysing the capacity by means empirical data. In the light of this considerations, the main objective of the paper is to give a theoretical closed-form model for evaluation the measures of effectiveness “MOE” (capacity, delay, queues) of the C-Roundabouts.
Cannabinoid control of brain bioenergetics: Exploring the subcellular localization of the CB1 receptor
2014
Brain mitochondrial activity is centrally involved in the central control of energy balance. When studying mitochondrial functions in the brain, however, discrepant results might be obtained, depending on the experimental approaches. For instance, immunostaining experiments and biochemical isolation of organelles expose investigators to risks of false positive and/or false negative results. As an example, the functional presence of cannabinoid type 1 (CB1) receptors on brain mitochondrial membranes (mtCB1) was recently reported and rapidly challenged, claiming that the original observation was likely due to artifact results. Here, we addressed this issue by directly comparing the procedures…