In the Central Desert of northern Baja California, blue fan palm populations (Brahea armata) are found as isolated oases on mountaintops and along canyons with ephemeral flow conditions. Here, the effect of the intera...In the Central Desert of northern Baja California, blue fan palm populations (Brahea armata) are found as isolated oases on mountaintops and along canyons with ephemeral flow conditions. Here, the effect of the interaction between the larva of an endemic moth, Litoprosopus bajaensis, and this endemic blue fan palm was documented for the first time. We registered the phenology of palms by counting the number of shoots with flowers or fruits, assessing their damage and calculating the reproductive success per individual palm within three populations: San Pedro Martir, Catavi?a, and La Libertad. Palm populations were severely impacted by this larva, causing high damage to the inflorescences. No differences were found in the number of inflorescence stems produced and damaged among study sites;but the reproductive success of palms was significantly higher in Catavi?a than in the other sites during the entire sampling period, and consequently an important proportion of stems escaped from the herbivore predation. We suggest that differences among sites may be explained by the fact that Catavi?a is the only alluvial canyon and can be considered an area of high nutrient uptake, resource availability, and rooting depths. In contrast the other two are bedrock canyons, where water runs intensely, sweeping away great portions of the nearby vegetation. Catavi?a received the highest precipitation during the winter season of 2010 allowing a continuous production of inflorescence stems and fruits. This preliminary study reveals a new endemic interaction, it occurrence at population and regional levels, and highlights the role of desert oases as resource patches and connectivity pathways for mobile insects. Finally, it also highlights the effects of different water flow dynamics and water pulses in providing an opportunity window of escape from predation for host plant species living in desert environments.展开更多
BACKGROUND Patella baja is a severe complication after knee injury or surgery,resulting in pain and impaired movement.This disorder is also a substantial challenge for orthopaedic surgeons.Currently,no consensus exist...BACKGROUND Patella baja is a severe complication after knee injury or surgery,resulting in pain and impaired movement.This disorder is also a substantial challenge for orthopaedic surgeons.Currently,no consensus exists regarding the gold standard management of patella baja.If not appropriately treated,significant dysfunction of the knee joint will occur.CASE SUMMARY A 46-year-old man with a left patellar fracture was treated with tension band fixation at a local hospital.He had undergone a second operation at the same hospital because of limited knee flexion 6 mo after surgery.Unfortunately,the patellar tendon was ruptured.The patellar tendon was subsequently repaired using an ipsilateral semitendinosus tendon.Two years later,the patient presented to our department with knee pain and loss of range of motion.Autogenous iliotibial band(ITB)enhancement combined with sagittal tendon lengthening plasty was used to improve the symptoms of the knee joint.The patient was followed up for 2 years.The knee joint function of the patient returned to the normal level.CONCLUSION We successfully treated patella baja using autogenous ITB enhancement combined with sagittal tendon lengthening plasty.展开更多
美国《现代轮胎经销商》(www.moderntiredealer.com)2019年1月30日报道:Mickey Thompson轮胎与车轮公司的最新轮胎瞄准了越野爱好者。Baja Pro X轮胎(见图1)不是为铺设路面设计的,而可能是该公司有史以来最具越野性能的轮胎。图1 Baja P...美国《现代轮胎经销商》(www.moderntiredealer.com)2019年1月30日报道:Mickey Thompson轮胎与车轮公司的最新轮胎瞄准了越野爱好者。Baja Pro X轮胎(见图1)不是为铺设路面设计的,而可能是该公司有史以来最具越野性能的轮胎。图1 Baja Pro X轮胎该越野轮胎的上市规格为43×14.50-17LT,未来将推出其他规格。Baja Pro X轮胎的特征包括.展开更多
文摘In the Central Desert of northern Baja California, blue fan palm populations (Brahea armata) are found as isolated oases on mountaintops and along canyons with ephemeral flow conditions. Here, the effect of the interaction between the larva of an endemic moth, Litoprosopus bajaensis, and this endemic blue fan palm was documented for the first time. We registered the phenology of palms by counting the number of shoots with flowers or fruits, assessing their damage and calculating the reproductive success per individual palm within three populations: San Pedro Martir, Catavi?a, and La Libertad. Palm populations were severely impacted by this larva, causing high damage to the inflorescences. No differences were found in the number of inflorescence stems produced and damaged among study sites;but the reproductive success of palms was significantly higher in Catavi?a than in the other sites during the entire sampling period, and consequently an important proportion of stems escaped from the herbivore predation. We suggest that differences among sites may be explained by the fact that Catavi?a is the only alluvial canyon and can be considered an area of high nutrient uptake, resource availability, and rooting depths. In contrast the other two are bedrock canyons, where water runs intensely, sweeping away great portions of the nearby vegetation. Catavi?a received the highest precipitation during the winter season of 2010 allowing a continuous production of inflorescence stems and fruits. This preliminary study reveals a new endemic interaction, it occurrence at population and regional levels, and highlights the role of desert oases as resource patches and connectivity pathways for mobile insects. Finally, it also highlights the effects of different water flow dynamics and water pulses in providing an opportunity window of escape from predation for host plant species living in desert environments.
文摘BACKGROUND Patella baja is a severe complication after knee injury or surgery,resulting in pain and impaired movement.This disorder is also a substantial challenge for orthopaedic surgeons.Currently,no consensus exists regarding the gold standard management of patella baja.If not appropriately treated,significant dysfunction of the knee joint will occur.CASE SUMMARY A 46-year-old man with a left patellar fracture was treated with tension band fixation at a local hospital.He had undergone a second operation at the same hospital because of limited knee flexion 6 mo after surgery.Unfortunately,the patellar tendon was ruptured.The patellar tendon was subsequently repaired using an ipsilateral semitendinosus tendon.Two years later,the patient presented to our department with knee pain and loss of range of motion.Autogenous iliotibial band(ITB)enhancement combined with sagittal tendon lengthening plasty was used to improve the symptoms of the knee joint.The patient was followed up for 2 years.The knee joint function of the patient returned to the normal level.CONCLUSION We successfully treated patella baja using autogenous ITB enhancement combined with sagittal tendon lengthening plasty.
文摘美国《现代轮胎经销商》(www.moderntiredealer.com)2019年1月30日报道:Mickey Thompson轮胎与车轮公司的最新轮胎瞄准了越野爱好者。Baja Pro X轮胎(见图1)不是为铺设路面设计的,而可能是该公司有史以来最具越野性能的轮胎。图1 Baja Pro X轮胎该越野轮胎的上市规格为43×14.50-17LT,未来将推出其他规格。Baja Pro X轮胎的特征包括.
