A study on pollination of Winter Nelis pears

1975 ◽  
Vol 15 (72) ◽  
pp. 105 ◽  
Author(s):  
DF Langridge ◽  
PT Jenkins
Keyword(s):  
Airborne Pollen ◽  
Pear Orchard ◽  
Mesh Cage ◽  
Marked Decline

The roles of wind and honeybees in the transport of pollen for fertilization of Winter Nelis Pears was studied in a pear orchard at Doncaster East, Victoria. Concentrations of airborne pollen in the orchard were greater between 10.00 a.m. and 4.00 p.m. than during the remainder of the day but were similar inside and outside a 2.5 mm mesh cage. Enclosing the trees in beeproof cages caused a marked decline in fruit yields and in numbers of seeds per fruit. The results of this study are compared with those of a previous study with Packhams Triumph Pears.

The role of honeybees in pollination of cherries

1973 ◽  
Vol 13 (61) ◽  
pp. 193 ◽  
Author(s):  
DF Langridge ◽  
RD Goodman
Keyword(s):  
Airborne Pollen ◽  
Flight Activity ◽  
Ambient Temperatures ◽  
Pollen Concentrations ◽  
Cherry Orchard ◽  
Marked Decline

The availability of pollen for fertilization of Moss' Early cherries and its dispersal by wind and by honeybees was studied in the laboratory and in a cherry orchard. Ripening and dehiscence of anthers was promoted by higher temperatures and lower relative humidities. Airborne pollen concentrations in the orchard were greater between 10.00 a.m. and 4.00 p.m. than during the remainder of the day. Flight activity of bees was related to ambient temperatures and bee visits to cherry flowers were comparable with those for apples. Enclosing trees in beeproof cages caused a marked decline in fruit yields.

A study on pollination of Packham's Triumph pears

1972 ◽  
Vol 12 (56) ◽  
pp. 328 ◽  
Author(s):  
DF Langridge ◽  
PT Jenkins
Keyword(s):  
Ambient Temperature ◽  
Airborne Pollen ◽  
Flight Activity ◽  
Pear Orchard ◽  
Pear Trees

The availability of pollen for fertilizing Packham's Triumph pear flowers and its dispersal aerially and by honeybees was studied in the laboratory and in a pear orchard. Ripening and dehiscence of anthers were promoted by higher temperatures and lower relative humidities. More airborne pollen was in the orchard between 10 a.m. and 4 p.m. than during the remainder of the day. Flight activity of bees was related to ambient temperature but not to visits to pear trees. Enclosing trees in beeproof cages did not cause significant effects on yield of fruit or seed counts. The apparent failure of bees to effect pollination of Packham's Triumph pear flowers is discussed.

Airborne pollen and spores’ deposition in alveolar tissues as a tool in drowning forensic diagnosis

Aerobiologia ◽  
2021 ◽  
Author(s):  
H. García-Mozo ◽  
C. M. Beltran-Aroca ◽  
I. K. Badu ◽  
I. Jimena ◽  
E. Girela-López
Keyword(s):  
Airborne Pollen ◽  
Pollen And Spores ◽  
Airborne Pollen And Spores

scholarly journals A novel anatomic titanium mesh cage for reducing the subsidence rate after anterior cervical corpectomy: a finite element study

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yuhang Wang ◽  
Yi Zhan ◽  
Huiming Yang ◽  
Hua Guo ◽  
Haiping Zhang ◽  
...  
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Titanium Mesh ◽  
Titanium Mesh Cage ◽  
Element Analysis ◽  
Cervical Corpectomy ◽  
Subsidence Rate ◽  
Anterior Corpectomy ◽  
Mesh Cage ◽  
Anterior Cervical Corpectomy

AbstractFusion with a titanium mesh cage (TMC) has become popular as a conventional method after cervical anterior corpectomy, but postoperative TMC subsidence has often been reported in the literature. We designed a novel anatomic cervical TMC to reduce the postoperative subsidence rate. According to the test process specified in the American Society of Testing Materials (ASTM) F2267 standard, three-dimensional finite element analysis was used to compare the anti-subsidence characteristics of a traditional TMC (TTMC) and novel TMC (NTMC). Through analysis, the relative propensity values of a device to subside (Kp) of the TTMC and NTMC were 665.5 N/mm and 1007.2 N/mm, respectively. A higher Kp measurement is generally expected to indicate that the device is more resistant to subsidence into a vertebral body. The results showed that the novel anatomic titanium mesh cage (NTMC) significantly improved the anti-subsidence performance after anterior cervical corpectomy and fusion (ACCF), which was approximately 51.3% higher than that of the traditional titanium mesh cage.

scholarly journals Potential Fertilization Capacity of Two Grapevine Varieties: Effects on Agricultural Production in Designation of Origin Areas in the Northwestern Iberian Peninsula

Agronomy ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 961
Author(s):  
J. Antonio Cortiñas Rodríguez ◽  
María Fernández-González ◽  
Estefanía González-Fernández ◽  
Rosa A. Vázquez-Ruiz ◽  
F. Javier Rodríguez-Rajo ◽  
...  
Keyword(s):  
Airborne Pollen ◽  
Germination Rate ◽  
Pollen Viability ◽  
Weather Conditions ◽  
Triphenyl Tetrazolium Chloride ◽  
Tetrazolium Chloride ◽  
The Mean ◽  
Study Sites ◽  
Fertilization Capacity

In the present study, we analyzed the main parameters related with the potential fertilization ability of two grapevine varieties, Godello and Mencía, during the years 2017 and 2018. The research was carried out in two vineyards of the Galician winegrowing Designation of Origin areas of Ribeiro and Ribeira Sacra. Ten vines of each variety were selected for bunch and flower counting, pollen calculations, pollen viability studies by means of aceto-carmine (AC) stain and 2, 3, 5-triphenyl tetrazolium chloride (TTC) methods, and the determination of their germination rate. In all vineyards the 50% fruitset was reached, except for Godello in Cenlle during 2017. The mean coulure value was higher for Godello (40.5%) than for Mencía (31%). Analyzing the pollen production per plant and airborne pollen levels, we observed important discordances between them, which can be due to the influence of weather conditions and be related with self-pollination processes. We found important differences on pollen viability depending on the applied method and variety, with higher values for the AC method than the TTC for both varieties in all study plots, and higher values for Mencía variety than Godello. Regarding germination rates, we observed a marked reduction in 2017 with respect to 2018, in all study sites and for both varieties. The analyzed parameters were useful to explain the different productive abilities of Godello and Mencía varieties in the two studied bioclimatic regions of Ribeiro and Ribeira Sacra.

A 3-year airborne pollen and fungal spores record in San Carlos de Bariloche, Patagonia, Argentina

Aerobiologia ◽  
2006 ◽  
Vol 22 (4) ◽  
pp. 247-257 ◽  
Author(s):  
Maria Martha Bianchi ◽  
Susana Ester Olabuenaga
Keyword(s):  
Airborne Pollen ◽  
Fungal Spores ◽  
San Carlos

scholarly journals The Relationship between Symptom Flare of Atopic Dermatitis and Airborne Japanese Cedar and Cypress Pollen Counts: A Self-Scoring Diary Study

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Haruko Nishie ◽  
Mariko Kato ◽  
Shiori Kato ◽  
Hiroshi Odajima ◽  
Rumiko Shibata ◽  
...  
Keyword(s):  
Atopic Dermatitis ◽  
Real Time ◽  
Pollen Season ◽  
Airborne Pollen ◽  
Japanese Cedar ◽  
Diary Study ◽  
Pollen Counts ◽  
High Level ◽  
The Relationship

Background. With an increase in Japanese cedar and cypress (JC) pollinosis, the relationship between JC pollen and atopic dermatitis (AD) has been studied. Some reports suggest that JC pollen can be one exacerbating factor for AD, but there has been no report that discusses JC pollen counts relating to AD symptom flare although actual airborne JC pollen counts can widely fluctuate throughout the pollen season. Objective. The relationship between symptom flare of AD and airborne JC pollen counts was examined. Methods. We monitored JC pollen counts in real time and divided the counts into low and high level. We then analyzed self-scored “itch intensity” recorded by 14 AD patients through a self-scoring diary. Results. Among the 14 patients, 7 had significantly higher itch intensity while the pollen counts were high. Conclusion. Even during the pollen season, actual airborne pollen counts can widely fluctuate. Our study suggested that symptom flare of AD could be influenced by the actual pollen counts.

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