Postharvest conservation of Formosa 'Tainung 1' papaya under refrigeration, modified atmosphere, and chitosan

The objective of this work is to evaluate the use of modified atmosphere and chitosan as an alternative to chemical treatment in postharvest conservation of 'Tainung 1' papaya under refrigeration. The experiment comprised of completely randomized blocks with four replications, one fruit per replication, with a 2 × 4 × 4 factorial design as follows: two types of packaging (with or without polyvinyl chloride [PVC] stretchable film, thickness of 17 µm), four treatments (control, 2% chitosan, 4% chitosan, and prochloraz fungicide with 33.75 g a.i.·100 L­1), and four storage periods (0, 7, 14, and 21 days) at 10 °C and relative humidity (RH) of 90 ± 5%. The variables evaluated were mass loss (ML), external appearance, titratable acidity (TA), soluble solids (SS), vitamin C, reducing sugars (RS), and total sugars (TS). The storage of 'Formosa' papaya under refrigeration at 10 °C and RH of 90 ± 5% associated with PVC provided a low percentage of ML and longer conservation time of apparent quality (up to 7 days) in relation to fruits with no storage in PVC. The external appearance of fruits was preserved for up to 14 days by the PVC + 4% chitosan treatment and for up to 21 days by the PVC + prochloraz fungicide treatment. The treatment PVC + 4% chitosan associated with refrigeration is efficient in maintaining fruit quality. It is, for up to 14 days, a viable alternative to the use of prochloraz fungicide for postharvest conservation of 'Formosa' papaya.

Effect of sealing on the feed out face of trench silos on the performance of confined calves / [Efeito da vedação na porção inicial de silos trincheiras sobre o desempenho de novilhos confinados]

This study aimed to evaluate the productive performance, dry matter intake, apparent digestibility and ingestive behavior of feedlot calves fed corn silage from the feed out face of trench silos with different types of sealing. The animals were divided into three treatments with four repetitions: Conventional seal - double-sided polyethylene of 110µm thickness; Double-sided seal - double-sided polyethylene of 200µm thickness; and Double seal - composed of double face polyethylene with a thickness of 80µm superimposed on a polyamide translucent vacuum film with a thickness of 20µm. The use of double face sealing provided 12.63% increase in average daily gain and improved food conversion by 0.62 percentage points. The apparent digestibility of the diet with double-face sealing system silage was 4.30% higher than the diet with double-face sealing silage and 11.00% higher than the diet with conventional sealing silage. It is recommended to use the double face sealing with 200µm polyethylene and double face sealing with 80µm thick polyethylene on top of a 20µm thick polyamide translucent vacuum film.(AU)

Objetivou-se avaliar o desempenho produtivo, o consumo de matéria seca, a digestibilidade aparente e o comportamento ingestivo de novilhos confinados, alimentados com silagem de milho da porção inicial de silos do tipo trincheira, conservada sob distintos tipos de vedação. Os animais foram divididos em três tratamentos, com quatro repetições: vedação convencional - polietileno tipo dupla face, com espessura de 110µm; vedação dupla face - polietileno tipo dupla face, com espessura de 200µm; e dupla vedação - polietileno tipo dupla face, com espessura de 80µm sobreposto a um filme vácuo translúcido de poliamida, com espessura de 20µm. O uso da vedação dupla face proporcionou incremento de 12,63% no ganho de peso médio diário e melhorou em 0,62 ponto percentual a conversão alimentar. A digestibilidade aparente da dieta com silagem do sistema de vedação dupla face foi 4,30% superior em relação à dieta com silagem da dupla vedação e 11,00% superior à dieta com silagem da vedação convencional. Recomenda-se a utilização tanto da vedação dupla face com polietileno de 200µm quanto da dupla vedação com polietileno tipo dupla face, com espessura de 80µm, sobreposto a um filme vácuo translúcido de poliamida com espessura de 20µm.(AU)

Application of biodegradable plastic film to reduce plastic film residual pollution in Chinese agriculture / 生物工程学报

Plastic film has become an important agriculture production material in recent years. Over the past three decades, the amount and application area of plastic film have increased steadily, and in 2014, which are 1.4 million tons and more than 180 million hm² respectively. It plays a key role for ensuring the supply of agricultural goods in China. Meanwhile, plastic film residual pollution becomes more and more serious, and in some regions, the amount of plastic film residues has reached over 250 kg/hm². In part of the Northwest region, soil structure of farmland has been destroyed by plastic film residues and then crop growth and farming operations were suppressed. It is recognized as a good choice to replace plastic film with biodegradable plastic film, an effective measure to solve the plastic film residue pollution. Now, it is in a critical stage of study and assessment of biodegradable plastic film in China and fortunately some biodegradable plastic films show effects in the production of potatoes, peanuts and tobacco. Overall, a series of challenges has still been faced by the biodegradable plastic film, mainly including improving the quality of biodegradable plastic products, such as tensile strength, flexibility, improving the controllability of rupture and degradation, enhancing the ability of increasing soil temperature and preserving soil moisture, and to satisfy the demand of crops production with mulching. In addition, it is essential to reduce the cost of the biodegradable film and promote the application of biodegradable film on large-scale. With the development of biodegradable plastic technology and agricultural production environment, the application of the biodegradable film will have a good future.

Research on the peel-away plastic film sheath combination of ureteroscopy pneumatic lithotripsy treatment of female lower segment ureteral calculi / 中国医学装备

Objective:To explore the reliability, availability and security of peel-away plastic film sheath combination of ureteroscopy pneumatic lithotripsy treatment of female lower segment complexity ureteral calculi.Methods: The treatment group(40 cases) used peel-away plastic film sheath establish a bridge sheath channel between the urethra, bladder and the ureteral opening, combining under ureteroscopy pneumatic lithotripsy treatment. The control group(40 cases) with traditional under ureteroscopy pneumatic lithotripsy treatment. The clinical data of two groups of patients were analyzed.Results: The cure rate of the treatment group was significantly higher than the control group(x2=5.54,P<0.05); and the stones operation time, the bleeding, hospital stays and hospital costs was much better than control group; the complications of surgery (except the ureteral perforation) was significantly less than that of control group.Conclusion: Treatment of female lower segment complexity ureteral calculi by using the peel-away plastic film sheath establish a bridge sheath channel between the urethra, bladder and the ureteral opening, combining under ureteroscopy pneumatic lithotripsy treatment, with safe, convenient, practical, low cost, little injury, fewer complications, etc. was worthy of clinical application.

Observation of molluscicidal effect of black plastic film combined with car-bon amide / 中国血吸虫病防治杂志

Objective To evaluate the molluscicidal effect of black plastic film combined with carbon amide. Methods In Jiangdong Town Jinhua City the field with Oncomelania hupensis in the history was selected as experimental area and divided into 3 groups Group One was administered with black plastic film combined with carbon amide Group Two was administered with simple black plastic film and Group Three was a control group. Results On the 3rd 7th 15th 20th and 30th day after the experiment the mortality rates of O. hupensis of Group One were 86.0% 88.0% 100% 100%and 100%respectively which were significantly higher than those of the control group all P<0.05 . The differences of mortality rates between Group One and Group Two were statistically significant on the 3rd and 7th day after the experiment Group One was superior to Group Two . Conclusion The black plastic film combined with carbon amide can improve the molluscicidal effect.

Molluscicidal effect of simple black film mulching in mountainous areas of Yunnan Province / 中国血吸虫病防治杂志

Objective To evaluate the molluscicidal effect of black plastic mulching in mountainous areas of Yunnan Prov-ince. Methods In Leqiu Village,Nanjian County,Yunnan Province,the terraced fields with Oncomelania hupensis snails were divided into A,B,C,D,E groups,and of which,A,B,C,D groups,as the experimental groups,were administered with sim-ple black plastic mulching for 30 days,60 days,90 days and 120 days respectively;Group E,as the control group,was adminis-tered with 50%niclosamide ethanolamine salt wettable powder spraying. Results In Group C and D(simple black film mulching for 90 days and 120 days),no snails were found after the administration,the average density of living snails decreased by 100%, and the cost of one year was similar to that of the control group. Conclusion The molluscicidal effect of black plastic mulching is good in mountainous areas.

A Study on Experiments the Environmental Conditions and the Adaptation of the Human Body in the Vinyl House / 예방의학회지

The purpose of this study is to experiments the environmental conditions and the adaption of the human body in the vinyl house. The study was done in spring and winter and experimental clothes were used working clothes in the vinyl house. The results are as follows. 1. Environmental conditions; In the spring season, the indoor air temperature was 27.4+/-3.7 degrees C and the outdoor air temperature was 14.4+/-2.7 degrees C. In the winter season, the indoor air temperature was 18.3+/-4.8 degrees C and the outdoor air temperature was 7.6+/-2.5 degrees C on the average. 2. Skin Temperature; In the spring season, the mean skin temperatures indoor and outdoor were 33.81+/-0.7 degrees C and 31.57+/-0.8 degrees C respectively, a difference of 2.24 degrees C. In the winter season, they were 31.95+/-1.93 degrees C and 29.86+/-0.55 degrees C respectively, a difference of 2.09 degrees C. 3. Clothing climate; In the spring season, the temperature and humidity in the inner layer of clothing were 34.77+/-0.80 degrees C and 70.75+/-1.65% and indoor, 31.9+/-0.52 degrees C and 51.9+/-3.70% outdoor respectively. In the winter season, those were 32.52+/-1.04 degrees C and 64.65+/-3.68% indoor, 30.27+/-0.96 degrees C and 45.07+/-2.68% outdoor respectively. 4. Physiological Factors; Body temperature increased slightly and the pulse rate also rises, but blood pressure decreased a little with the rise of environmental temperature both in the spring and winter seasons. 5. Psychological Factors; Thermal sensation in the spring season was expressed as "slightly larm" or "warm" indoor and as "neutral" in the open air, while in the winter it was expressed as "neutral" or "slightly warm" outdoor the house and as "cold" in the open air. Comfort sensation was characterized as "uncomfortable" or "slightly uncomfortable" indoor both in the spring and winter seasons, but in the open air it was characterized as "comfortable" in the spring and as "slightly uncomfortable" in the winter.