It has been conducted a study of identify population of spermatogenic cells of mice after induction Durian (Durio zibethinus Murr.) bark extract. This research used completely randomized design with five treatments i.e. control without treatment; control with aquadest; 5 percent durian bark extract; 10 percent; and 20 percent with five repetitions for each treatment. Extract was given per oral in volume dose of 0,5 ml/ 25–30 g/BW per day during 36 days. The result of this study showed that durian bark extracts caused significantly decrease of population of spermatogenic cells in concentrate 5, 10, and 20 percent.

This study aims to determine and describe the implementation of academic supervision of principals to improve teacher performance in online learning during the Covid 19 pandemic at SMPNegeri 2 Betung. This type of research is descriptive qualitative research. Collecting data using documentation, interviews, observation and literature review. The results of the study stated that: (1) The planning for the implementation of the principal's academic supervision was scheduled before the new academic year began, (2) it was carried out in accordance with the teaching and learning process which was directed at the pandemic, where teachers had used IT infrastructure in the learning process. teaching, (3) Evaluation of the results of the academic supervision process has been carried out, as evidenced by the implementation of clinical supervision, (4) based on the results of this study it can also be stated that the performance of teachers in implementing online learning is already in good condition, the implication of this research is that there are still teachers who do not understand the making of learning administration. Advice for Teachers, can independently increase professionalism by trying to use new applications.

The proboscis monkey or long-nosed monkey is diurnal and arboreal. This species is endemic to Borneo Island inhabit mangrove forest and swampland. Daily behavioral activities of the proboscis monkey kept in the Bekantan Rescue Center, Sahabat Bekantan Indonesia Foundation was interesting to be observed. A couple of adult proboscis monkey, which was approximately 10 years old for each individu, was utilized in the current study. Observation on daily behavioral activities included locomotion, eating, antagonistic, playing, grooming, and rest-activity. Proboscis monkey spent their daily time for resting, locomotion, grooming, eating, antagonistic, and playing with each percentage were 42.50%; 26.04%; 17.15%; 9.29%; 0.86%; and 0.13%, consecutively. Locomotion activities consisted of walk, jump, moving seat, swing, and cage-shaking. Grooming by removing pieces of dirt, dried skin, and insects from the hair were done individually and more frequently in female than male. Eating activities were 3 times a day, morning, noon, and afternoon with the duration of 5-15 minutes. An antagonistic expression such as opening wide-mouth, vocalization, and cage-shaking was frequently observed in the male shown when the unknown person was present. Playing activity was the lowest percentage activity observed. This activity is less frequently observed in the adult period. Rest activity consisted of night sleep and day sleep. Night sleep was observed from 09.00 P.M to 6.00 A.M, and day sleep was observed after eating time in the morning and noon. Daily behavioral activities of the proboscis monkey in the Bekantan Rescue Center tend to be done routinely and regularly.

A market is the place for the sale and purchase of goods with more than one merchant. It includes shopping centers, traditional markets, shops, malls, palazas, trade centers or other designations. Sanitation conditions are among the important factors in the running of market and poor hygiene may result in a wide range of unfavorable consequences, such as transmission of diseases and vector development. The purpose of the present study was to assess conditions of sanitary facilities, including locations, buildings, sanitation, clean and healthy behavior (CHB), security and other facilities of Wonokromo Market Surabaya. The study was a descriptive research. Data were collected by observations, interviews and measurements using a healthy market form. Variables included location, buildings, clean water bathrooms and toilets, waste management, drainage, sinks, animal-borne diseases of vectors, CHB of the merchants and market management, market disinfections, security and other facilities. Data were calculated for percentage and assingned to healthy, less healthy and unhealthy categories. In overall, conditions of sanitation facilities of Wonokromo Market Surabaya were categorized as unhealthy with a score of 5698 out of a variables, the variables locations and security were categorized as less healthy (66%, 60% and 64%, respectivety) and the variable other facilities was categorized as unhealthy (56%). It is recommended to check, improve and add sanitation facilities or other facilities in accordance with Regulation of the Health Minister No.519/Menkes/SK/VI/2008 on Guidelines for Implementation of Health Markets.

PT. Dok dan Perkapalan Surabaya (Persero) or DPS is state-owned enterprises which is engaged in shipbuilding and nationalization from the Netherlands. PT. DPS in the operational process requires a machine that causes noise during the production process. The purpose of this study is to know the influence of noise intensity, age, working, and ear plug on hearing threshold man-workers in production section of PT. DPS.This study used observational research design and belongs to field research. Based on the time, this study belongs to cross sectional research. The sample of this study is 55 people and used random technique. The researcher collected the data from observation, interview, and measuring. The data analysis was calculated by SPSS 20 version used Chi-Square test. If p > 0.05, the criterion Ho is can not be rejected and if p < 0.05, Ho is rejected. The results showed that the hearing threshold of production workers at PT. DPS are abnormal at 71.4%. Workplace noise that meets the requirements is only 40.5% and it is not acceptable for the requirements. Most of the workers in the production section of PT. DPS is> 40 years old, 92.9% and the rest are ≤ 40 years old. Work period of workers in the production section of PT. DPS have a working period of> 10 years with 97.6%. Workers in the production section of PT. DPS that did not use APT were 69% and the rest did not use APT. The hearing threshold man-workers was influenced by the noise (p=0.041) and the use of ear plug (p=0.03) and the hearing threshold was not influenced by age (p=0.192) and working (p=0.286).It is recommended for companies to carry out technical control, implement a work shift system if the work rotation system cannot be applied optimally, provide training on ear protection devices, and provide strict supervision and policies for workers who do not use APT in noisy workplaces.  Keywords: noise, age, ear plug, hearing threshold