Sökning: "primary sex ratio"

Visar resultat 1 - 5 av 47 avhandlingar innehållade orden primary sex ratio.

1. 1. Sex, hormonal factors and pancreatic cancer

   Författare :Gustav Andersson; Tumörmikromiljö; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Pancreatic cancer; Sex; Anthropometry; Hormonal factors; Tamoxifen treatment;

   Sammanfattning : Pancreatic cancer represents three percent of all incident cancer cases in developed countries, but stands the 7th most common cause of cancer related death. Worldwide, pancreatic cancer is more common among men, however in Sweden, the incidence ratio between sexes is levelling. LÄS MER

3. 2. Chiral building blocks for synthesis of pine sawfly sex pheromones Enantioselective Lipase Catalysed Acylations and Esterifications of Primary Alcohols and Acids and Synthesis of the Sex Pheromone of the Pine Sawfly Microdiprion pallipes

   Författare :Ba-Vu Nguyen; KTH; []
   Nyckelord :lipase; Pseudomonas cepacia; Candida rugosa; enantioselective; enantiomeric ratio; primary 2-methylalcohol; substituted-methylcarboxylic acid; pine sawfly; Microdiprion pallipes; sex pheromone; 3; 7; 11-trimethyl-2-tridecanol; stereoisomer;

   Sammanfattning : This thesis describes the development of new methods for thepreparation of enantiomerically pure methyl branched alkylcompounds and their use as building blocks in the synthesis ofstereoisomerically pure pheromones of pine sawflies.The high regioselectivity, enantioselectivity and activityof lipases in organic solvent in conjunction withenvironmentally compatible reaction conditions have madelipase-catalysed synthesis an attractive alternative toconventional synthetic methods in organic chemistry. LÄS MER

4. 3. Cancer of unknown primary: searching for the etiological clues. A population-based epidemiological study in Sweden

   Författare :Xiaochen Shu; Allmänmedicin och klinisk epidemiologi; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Cancer of unknown primary; causes of death; familial risk; immigrant; incidence; multiple malignancies; risk factor; squamous cell carcinoma; standardizedincidence ratio; survival;

   Sammanfattning : This thesis aimed to search for etiological clues about cancer of unknown primary(CUP) by gathering novel information. The Swedish national registries were used and CUP cases were identified according to the seventh revision of the International Classification of Diseases. LÄS MER

5. 4. Gender inequity in child survival : travails of the girl child in rural north India

   Författare :Anand Krishnan; Nawi Ng; Peter Byass; Chadrakant Pandav; Per Ashorn; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Conditional cash transfers; girl child; inequities; gender; prejudice; mortality; non-specific effects; sex; socio-economic; vaccines; Epidemiology; epidemiologi;

   Sammanfattning : Background: While substantial progress has been made globally towards achieving United Nations Millennium Development Goal 4 (MDG 4) on child mortality, the decline is not sufficient to reach the targets set for 2015. The South Asian region, which includes India, was to achieve the MDG 4 target of 39 deaths per 1000 live births by 2015 but was estimated to have reached only 61 by 2011. LÄS MER

7. 5. Parental and embryonic behaviours in precocial birds

   Författare :Irene Persson; Biologiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; pheasants; growth rate; oxygen consumption; hatch synchronization; incubation behaviour; nest predation; physical condition; Egg laying; primary sex ratio; mallards; Animal ecology; Djurekologi;

   Sammanfattning : This thesis deals with behaviours during reproduction in precocial birds, both from the perspective of the female and of the embryos. Female pheasants in good physical condition laid larger eggs and produced a higher proportion of daughters than females in poor condition. LÄS MER