A study of the somatic cell count (SCC) of Irish milk from herd management and environmental perspectives

End of project reportThe objective of this study was to investigate the herd management practices associated with somatic cell count (SCC) and total bacteria count (TBC), to geographically analyse SCC on a national basis, to investigate cow factors associated with SCC and to estimate the milk loss associated with high SCC across parities. From the 400 farms surveyed during farm visits throughout spring and winter, a profile of herd management was developed and the associations between management practices and milk SCC and TBC were established. Management practices associated with low SCC included the use of dry cow therapy, participation in a milk recording scheme, the use of teat disinfection post-milking, a higher frequency of cleaning and increased farm hygiene. Management practices associated with low TBC included the use of heated water in the milking parlour, participation in a milk recording scheme, tail clipping of cows at a frequency greater than once per year and increased farm hygiene. The spatial analysis showed that the south of the country had the greatest density of milk-recording herds. Approximately 60% of all herds in the study were from four counties (Cork, Kerry, Limerick and Tipperary). Average bulk tank SCC increased from 110,264 cells/mL in 2003 to 118,782 cells/mL in 2005, followed by a decrease to 108,454 cells/mL in 2007. Spatial clustering of high SCC scores was not observed (i.e., SCC on one farm was not related to SCC on other farms), which is consistent with mastitis being a herd problem as opposed to an area-based problem. SCC increased with parity from 97,000 cells/mL in parity 1 to 199,000 cell/mL in parity 6. SCC decreased between the period 5 to 35 days in milk (DIM) and 36 to 65 DIM, and increased thereafter. Cows calving in the months of January and September were associated with lower average 305 day SCC. The rate of increase in SCC from mid to late lactation was greatest in older parity animals. There was a test day milk loss of 1.43, 2.08, 2.59, 2.56 and 2.62 litres (parities 1 to 5, respectively) associated with an increase of SCC category from 400,000 cells/mL. When SCC was adjusted (test day SCC/dilution estimate, and test day SCC + (-ß)(test day milk yield)) to account for milk yield, similar trends in milk loss were observed. Alternatively, adjusting SCC (SCC*test day milk yield/mean test day milk yield) to account for milk yield showed an increase in test day milk with increasing SCC category. The results from this study highlight that adherence to best milking/farming practice will help reduce SCC and TBC on farms. The results contribute to the knowledge relating to SCC through increasing the accuracy of milk loss due to SCC and management practices associated with SCC. The results in the study can also be used in the development of strategies to reduce SCC on farms

Similarities and differences of pumping conventional and self-compacting concrete

In Practice, Self-Compacting Concrete (SCC) is Considered as a Simple Extension of Conventional Vibrated Concrete (CVC) When Pumping is Concerned. the Same Equipment, Materials, Pumping Procedures and Guidelines Used for CVC Are Applied When Pumping SCC. on the Other Hand, It Has Been Clearly Shown that the Rheological Properties and the Mix Design of SCC Are Different Than CVC. Can the Same Pumping Principles Employed for CVC Be Applied for SCC? This Paper Compares the Some Published Results of Pumping of CVC with Those for SCC. a First Striking Difference between Pumping of CVC and SCC is the Flow Behaviour in the Pipes. the Flow of CVC is a Plug, Surrounded by a Lubricating Layer, While during the Flow of SCC, Part of the Concrete Volume itself is Sheared Inside the Pipe. as a Result, the Importance of Viscosity Increases in Case of SCC. Due to the Low Yield Stress of SCC, the Behaviour in Bends is Different, But Quite Complex to Study. Due to the Lower Content of Aggregate and Better Stability of SCC, as It is Less Prone to Internal Water Migration, Blocking is Estimated to Occur at Lower Frequency in Case of SCC. © RILEM 2010

Obstetric and Gynecologic Departments, Faculty of Medicine Udayana University, Bali-Indonesia

The high risk of human papillomavirus (HPV) have already known widely and accepted as a causative agent for cervical cancer. Epidemiologically, predominant high-risk is HPV-16 and squamous cell carcinomas (SCC) is the most common histological type. HPV genotype probably correlates to histologic type. This study aims to determine how many fold is the risk of SCC on HPV-16 infection. This is a case control with SCC HPV-16 positive as the cases and SCC HPV-16 negative as the controls. Tissues diagnosed as SCC and non SCC was paraffin-embedded. SPF-10 and specific E7-primer types by LiPA were employed for genotyping of HPV-16. c2 was applied to analyze the correlation. A number of 65 SCC consisted of 33 cases and 32 controls were observed in this study. The risk of SCC on HPV-16 infection was 3.40-fold (95% CI = 1.44-8.03; p = 0.004) compare with HPV-16 negative. Controls in this study consist of 18 (27.69%) of HPV-18, 9 (13.85%) of HPV-52, and 5 (7.69%) of other HPV types. The mean-age of case group and control group infected by HPV were 52.28 ± 12.43 and 47.70 ± 8.02 year, respectively (p = 0.02). HPV-16 infection caused SCC is 3.5 more than other high risk group

Ductilityof fiber-reinforcedself-consolidatingconcreteundermulti-axial compression

The results of 12 multi-axial compression tests performed on cylinders made of self-consolidating concrete, plain (SCC) and reinforced with steel fibers (FR-SCC), are presented. In the experimental campaign, four ‘‘reference'' confining pressures (0, 1, 3 and 10 MPa) were applied on the lateral surface of the specimens. After the first stage of loading, when a hydraulic stress was applied to the cylinders, and progressively increased up to the value of a pre-established confining pressure, a longitudinal compressive load was used to generate crushing of concrete. During this failure, the post-peak behavior of SCC and FR-SCC can be defined by a non-dimensional function that relates the inelastic displacement and the relative stress during softening. Such a function also reveals the ductility of SCC, which increases with the confinement stress and with the fiber volume fraction. In particular, by adding 0.9% in volume of steel fibers, FR-SCC can show practically the same ductility measured in unreinforced SCC with 1MPa of confining pressure. Thus, the presence of an adequate amount of fibers in SCC columns is sufficient to create a sort of distributed confinement

Relationship of herd average somatic cell count and spontaneous recovery from subclinical mastitis

The rate of spontaneous recovery from subclinical mastitis was evaluated in 56 Kansas. DHI herds participating in the Somatic Cell Count (SCC) program. Herds were classified as low (>300,000) or high (>600,000) based on herd sec average. Comparisons between low and high SCC-herds were made for each cow's ability to recover from a subclinical case of mastitis (>600,000 SCC). Low-SCC herds had a rate of spontaneous recovery that was more than three times greater than that of high-SCC herds. Average SCC of cows with subclinical mastitis was similar in low and high herds J as well as the average sec of cows following spontaneous recovery. Results illustrate the importance of monitoring monthly sec reports. Proper attention to good procedures of milking management includes: attention to milking techniques, proper function of milking equipment, and attention to sanitation and housing conditions. As a result, herds with low SCC tests will have higher production and fewer subclinical cases of mastitis

A review on performance of waste materials in self compacting concrete (scc)

Self-compacting concrete (SCC) was first developed in late 80’s in Japan. SCC is well known for its self-consolidation and able to occupy spaces in the formwork without any vibration and become new interesting topic in Construction and Building Materials Research. There were various SCC researches that have been carried out in Turkey, Malaysia, Thailand, Iran, United Kingdom, Algeria, and India.The aim of this review is to summaries the alternative material used in the mix design from 2009 to 2015 through available literature. It hascommon materials such as Limestone Powder (LP), Fly Ash (FA), Silica Fume and Granulated Blast Furnace Slag (GBFS). While there are many alternative or recycled material can be used in producing SCC. This review only focus on waste material fromMarble Powder (MP), Dolomite Powder (DP), Crump Rubber (CR), Recycled Aggregate (RA) and Rise Husk Ash (RHA).Each type of materialshassimilarity effect in fresh and hardened state of SCC. Therefore, this paper will provide significant and useful information to those new to SCC and fellow researchers for future studies on SCC

Cow, farm, and herd management factors in the dry period associated with raised somatic cell counts in early lactation

This study investigated cow characteristics, farm facilities, and herd management strategies during the dry period to examine their joint influence on somatic cell counts (SCC) in early lactation. Data from 52 commercial dairy farms throughout England and Wales were collected over a 2-yr period. For the purpose of analysis, cows were separated into those housed for the dry period (6,419 cow-dry periods) and those at pasture (7,425 cow-dry periods). Bayesian multilevel models were specified with 2 response variables: ln SCC (continuous) and SCC >199,000 cells/mL (binary), both within 30 d of calving. Cow factors associated with an increased SCC after calving were parity, an SCC >199,000 cells/mL in the 60 d before drying off, increasing milk yield 0 to 30 d before drying off, and reduced DIM after calving at the time of SCC estimation. Herd management factors associated with an increased SCC after calving included procedures at drying off, aspects of bedding management, stocking density, and method of pasture grazing. Posterior predictions were used for model assessment, and these indicated that model fit was generally good. The research demonstrated that specific dry-period management strategies have an important influence on SCC in early lactation

Transfer and Development Length of Prestressing Tendons in Full-Scale AASHTO Prestressed Concrete Girders Using Self-Consolidating Concrete

Self-consolidating concrete (SCC) is a highly workable concrete that flows through densely reinforced or complex structural elements under its own weight. The benefits of using SCC include: a) Reducing labor costs by eliminating the need for mechanical vibration, b) Improving constructability, c) Providing a virtually flawless finish, d) Providing uniform and homogenous concrete, and e) Easily filling a complex shape formwork. Even though SCC is comparable to conventional concrete in terms of strength, the comparability of its bond to steel is less well-defined. This disparity of knowledge becomes more critical when using SCC in prestressed members due to the impact that bond strength has on the transfer and development lengths of prestressing tendons. The increasing interest among Illinois precasters in using SCC in bridge girders has motivated the Illinois Department of Transportation (IDOT) and the Illinois Center for Transportation (ICT) to sponsor this synthesis study, which reviews and combines information from literature discussing the impact of using SCC on the transfer and development lengths of prestressing tendons in AASHTO bridge girders. The primary objectives of this study include: (1) Utilizing the results of previous research to evaluate the effect of using SCC on the transfer and development lengths of prestressing tendons and evaluate how SCC compares with conventional concrete, (2) Investigating the feasibility of using SCC in AASHTO bridge girders without the need for changing current design provisions recommended by the ACI and AASHTO, and (3) Providing IDOT with recommendations regarding the application of SCC in prestressed bridge girders. 17. KeyICT-R27-36published or submitted for publicationis peer reviewe

A review on performance of waste materials in self compacting concrete (scc)

Self-compacting concrete (SCC) was first developed in late 80’s in Japan. SCC is well known for its self-consolidation and able to occupy spaces in the formwork without any vibration and become new interesting topic in Construction and Building Materials Research. There were various SCC researches that have been carried out in Turkey, Malaysia, Thailand, Iran, United Kingdom, Algeria, and India.The aim of this review is to summaries the alternative material used in the mix design from 2009 to 2015 through available literature. It hascommon materials such as Limestone Powder (LP), Fly Ash (FA), Silica Fume and Granulated Blast Furnace Slag (GBFS). While there are many alternative or recycled material can be used in producing SCC. This review only focus on waste material fromMarble Powder (MP), Dolomite Powder (DP), Crump Rubber (CR), Recycled Aggregate (RA) and Rise Husk Ash (RHA).Each type of materialshassimilarity effect in fresh and hardened state of SCC. Therefore, this paper will provide significant and useful information to those new to SCC and fellow researchers for future studies on SCC

OSCILACIJA U BROJU SOMATSKIH STANICA KOD KONTROLIRANIH KRAVA U SLOVENIJI U RAZDOBLJU 1997-2007

Oscillation of somatic cell count (SCC) in milk of recorded cows was studied in Slovenia for the period 1997 to 2007. Measurements of 5,267,264 test days were taken predominantly of Simmental (42.4 %), followed by Black and White (37.7 %) and Brown breed (19.9 %). The analysis showed substantial seasonal differences in milk yield and in milk composition. Breeders are faced with problems of low milk quality and frequent mastitis in summer months. It has been concluded that the average SCC was the highest in Black and White cows (404x103/ml milk) and the lowest in Simmental cows (288x103/ml milk). Since 1996 SCC has been considered one of the criteria for milk price determination, therefore it has been reduced and health status of udder improved in recent years. Both are the result of better herd management and wider knowledge that breeders achieved. The average SCC dropped from 431 thousand in 1996 to 331 thousand cells/ml milk in 2007. Lower SCC was noticed also on family farms compared to the former large scale farming enterprises. Monthly recording analysis proved that 10.1 % cows had more than 400 thousand SCC/ml milk, and 84.9% cows up to 250 thousand SCC/ml milk at recording. During the trial period milk yield/milking day increased and fat, as well as protein content improved.Oscilacija u broju somatskih stanica (SCC) kod kontroliranih krava proučavana je u Sloveniji u razdoblju od 1997. do 2007. godine. Tijekom 5.267.264 test dana mjerenja su obavljana pretežno za simentalsku (42,4%), zatim za crno-bijelu (37,7%) i smeđu pasminu (19,9%). Analiza je pokazala znatne sezonske razlike u mliječnosti i sastavu mlijeka. Uzgajivači se suočavaju s problemom loše kakvoće mlijeka i čestom pojavom mastitisa u ljetnim mjesecima. Utvrđeno je da je prosječan SCC najviši kod crno-bijelih krava (404x103/ml mlijeka), a najmanji kod simentalskih krava (288x103/ml mlijeka). Počev od 1996. godine, broj somatskih stanica smatra se jednim od kriterija za utvrđivanje cijene mlijeka. Zahvaljujući boljem upravljanju stadom i proširivanju znanja uzgajivača, SCC je zadnjih godina smanjen, a stanje zdravlja vimena je poboljšano. Prosječan SCC smanjio se od 431.000 stanica/ml mlijeka u 1996. godini na 331.000 stanica/ml mlijeka u 2007. godini. Primjećeno je, također, da je SCC niži na obiteljskim farmama nego na bivšim velikim gospodarstvima. Analiza mjesečne kontrole pokazala je da je 10,1% krava imalo više od 400.000 SCC/ml mlijeka, a 84,9% krava do 250.000 SCC/ml mlijeka u vrijeme kontrole. Tijekom probnog razdoblja mliječnost po mliječnom danu se povećala, a mliječna mast i sadržaj proteina su se poboljšali